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[...]Central Hesse, Germany Mittelhessen University of Technology (THM) university of applied science intends to exploit a previously quite unknown potential with a new system: heating and cooling with energy from wastewater. The new plant, with the HUBER ThermWin system at its core, was commissioned at the end of May by THM's executive committee, Giessen's Mayor Frank Tilo Becher and Ayse Asar, State Secretary at the Hessian Ministry of Science and Art (HMWK). THM President Prof. Dr Willems: “previously untapped wealth” The plant is located at THM's Wiesenstraße campus. With canteens, numerous lecture halls, central administrative facilities as well as laboratories and workshops in several specialist areas, the campus is always a bustling hive of activity. The amount of wastewater generated is correspondingly high. In addition, the university primarily uses the wastewater from public sewers. “It may sound strange, but this wastewater represents previously untapped wealth,” THM President Prof. Dr Matthias Willems said during commissioning. Wastewater has average temperatures of 10 to 12 degrees Celsius in winter and just under 20 degrees in summer. Using heat exchangers and heat pumps, this “wealth” can be used for cooling and heating. Saving 300 tonnes of CO 2 per year with HUBER ThermWin At THM, the wastewater will in future be collected from the sewers of the Central Hessian water utility company using a HUBER ROTAMAT ® RoK4 pumping stations screen. From there, the liquid medium is pumped into the HUBER RoWin heat exchanger installed in the building, while the solids are directly returned to the sewer. The heat exchanger operates a heat pump in winter and a chiller in summer. The heat pump can provide around 850 kW of heat output, while the chiller generates around 600 kW of cooling energy. The aim is to save around 300 tonnes of CO 2 per year. Hessen’s State Secretary Asar: “system saves CO 2 and advances research into sustainability” “Hessen plans to be climate-neutral by 2045, the state government wants to lead by example and be CO 2 neutral by 2030 – universities will make an important contribution to this as a result of their share of energy consumption in the state properties,” Ayse Asar explained. "And, it goes without saying that our universities are also training the bright minds of tomorrow who are developing solutions for a climate-friendly energy supply. The wastewater heat recovery plant not only saves CO 2 , it also represents a big step forward in sustainability research." Around EUR 1 million in funding HMWK is supporting the construction and operation of the plant with around one million euros from the “REACT-EU” fund, which was set up in response to the Covid pandemic to promote projects in the European Regional Development Fund (ERDF), especially at educational institutions. However, the idea of using the heat from wastewater was already floating around at THM before the pandemic, as Prof. Dirk Metzger, Vice President of Strategic Construction Planning and Sustainability, explained. The project was implemented in 2022, when THM’s facility management developed an energy concept and, following a tour of the HUBER pilot plant at the Museum of Bavarian History in Regensburg, started with the concrete planning. The structural key elements of the plant for the use of energy in wastewater were delivered last December before commissioning was completed in May of this year. Federal Minister Geywitz found out more on site At the end of August, Klara Geywitz, Federal Minister for Housing, Urban Development and Building, gained first-hand information on site about the potential of municipal wastewater for heating and cooling: “it is becoming increasingly more important that we have as many decentralised solutions as possible in terms of energy and heat supply,” Geywitz said. During a guided tour of the technical facilities, she was impressed by the engineering performance and its compact implementation, which also enables its use in existing buildings or new residential housing districts. “What you are doing here is basically municipal heat planning – just on a campus,” emphasised Federal Minister Geywitz. The fact that the university relies on wastewater as an energy source that is available anywhere is innovative: “you are using something that is actually seen as a problem, without generating additional costs or an environmental impact.” The fact that the technology is also available for teaching and research purposes in the sense of an actual laboratory completes the idea of sustainability.[...]

[...]Morgantown, West Virginia, USA USA keep relying on HUBER when it comes to screening wastewater upstream of membrane plants The HUBER fine screens for the protection of downstream membrane plants have a long tradition in the USA. Due to continued further development we have been able to offer our customers tailored solutions for membrane screening and implement machines for a variety of different applications. Our screens were also selected recently for the project Morgantown where they will protect Evoqua's Memcor hollow fibre membranes. Morgantown is a city and county seat of the Monongalia County in the north of the US state West Virginia. The town was founded in 1810 and is situated on the Monongahela River, near the border to Pennsylvania. Due to the rapidly developing infrastructure and associated additional loads arriving on the sewage treatment plant Morgantown, the wastewater treatment on site had to be adapted to cope with increased flows and to meet also the EPA standards. Three years passed from the first contact until order placement. Finally, HUBER USA managed to receive the order for the complete mechanical pretreatment equipment including the membrane screens. Commissioning of the machines is scheduled for mid of 2018: HUBER STEP SCREEN® SSV, the well-proven inlet screen HUBER Wash Press WAP® units for screenings treatment HUBER Coanda Grit Washer RoSF4 for grit classification and separation of organic matter from grit HUBER Perforated Plate Screen ROTAMAT® STAR liquid for membrane screening HUBER Micro Strainer ROTAMAT® Ro9 to treat the fine screenings from the membrane screen Reliable protection of the membrane plants with HUBER Perforated Plate Screen ROTAMAT® STAR liquid We had to meet several specific customer requirements with our machines to be installed for the protection of the hollow fibre membranes: Reliable separation of disturbing material Space-saving installation downstream of the primary settling tank Easy removal and transport of the separated fine screenings Downstream treatment of the fine screenings Three HUBER Perforated Plate ROTAMAT® STAR liquid screens were finally selected, two for parallel operation and one as standby unit. The throughput capacity per unit is 608 l/s. The fine screenings from each machine flow through gravity lines into a central pipeline through which they are flushed to a pump sump. From this pump sump, the water-solids mix is pumped to two HUBER Micro Strainer ROTAMAT® Ro9 units. The micro strainers are installed approx. 6 m above the fine screen. Due to its unique and special design the HUBER Perforated Plate ROTAMAT® STAR liquid screen can be installed at a small inclination angle. This, in addition to the 30% larger screening surface of the screen basket provided by the innovative STAR design, makes it possible to achieve very high throughputs. Moreover, the separated screenings can be passed on to further treatment as a water-solids mix without the need for an additional discharge screw. A great advantage of this solution is that the screenings do not have to be treated in the machine but can be treated centrally even at a distant location. Extra screw conveyors that would need a lot of space are therefore not necessary. This concept has already been implemented in many installations around the world and this project will be the first of this kind in the USA. It is a very interesting and economical system for projects where space-saving solutions combined with high throughputs and maximum freedom of planning are required for the treatment of screenings.[...]

[...]Hanover, Germany The sewage sludge recycling plant in Hanover-Lahe will go into operation after successful hot start-up and optimisation: the plant, which has been equipped with two HUBER RotaDry® 2050 M disc dryer units, now recycles sewage sludge from the surrounding sewage treatment plants every day and supplies 5,000 households with district heating from a renewable source. The opening ceremony for the sewage sludge recycling plant took place on 6 July in the presence of Dr. Manfred Schüle (Managing Director of enercity contracting GmbH), Dr. Susanna Zapreva (Chief Executive Officer of enercity) and Hanover’s Mayor Belit Onay. Recycling 130,000 tonnes of sewage sludge per year The primary goal of the plant, which was planned and built by sludge2energy GmbH as the general contractor, is to recycle around 130,000 t of drained sewage sludge per year. A further goal is the return of the valuable and finite raw material phosphorus from the sewage sludge ash. As a result, enercity contracting GmbH is already making it possible today to comply with the recovery of phosphorus from wastewater, legally required as of 2029. HUBER supplied key plant components With the two disc dryers, HUBER supplied two key components for the Hanover-Lahe recycling plant. The sewage sludge delivered by various sewage treatment plants is supplied to the respective dryers by a bunker crane and piston pumps. The two HUBER RotaDry® 2050 M disc dryers dry the sludge from an average of approx. 22% DR to approx. 40% DR. The partially dried sewage sludge is then autothermally recycled in the subsequent, fluidised bed incineration unit. This means that without additional fuel, the thermal energy from the combustion is sufficient to supply the consumers of the steam system with steam. The installed turbine also makes its contribution to covering the plants own electrical needs. Greener district heating for up to 15,000 citizens of Hanover In addition to sewage sludge utilisation, the plant also contributes to making district heating in Hanover greener. The sewage sludge utilisation plant supplies up to 15,000 customers within the supply area with regenerative heat. Consequently, fossil-fuelled heat is substituted in the district heating network. A majority of this extracted heat is provided by the vapour condenser supplied by HUBER. Here, the vapours evaporated in the disc dryers are re-condensed, the district heating water is heated to 90°C and then made available to consumers. The HUBER start-up team would like to thank all those involved for the constructive cooperation on the construction site and wish everyone smooth plant operation![...]

[...]Devon, England HUBER Technology recently completed and commissioned a large project for South West Water to improve the inlet works facility to treat the sewage from the town of Exmouth in Devon. Project Profile HUBER Technology were approached by Tecker towards the end of 2015 to look at improving the existing inlet works on site. The site features a balance tank which was prone to a large build up of rag and screening which were overloading the existing inlet works. Cleaning of this rag build up proved difficult and dangerous so the project was split into two sections, supply of a coarse screen to protect the balance and storm tanks and supply of new fine inlet screens and screenings handling equipment. HUBER Technology Supplied: 1 x HUBER Multi-Rake Bar Screen RakeMax® 4160/990/40, throughput 1027 l/s peak flow per screen 2 x HUBER Belt Screen EscaMax® 5000/1352/6, throughput 363 l/sec peak flow per screen 2 x HUBER Screenings Wash Press WAP® WAP/L BG4-V, throughput 4.5m³/hr Objective The challenge on site was to maintain adequate screening on site whilst the new screens were installed. Previously the flow into the balance tank was via four pumped rising mains, flow to the inlet screens was controlled by penstocks in the balance tank. We worked with the contractors – Tecker to develop a solution to minimise downtime. This solution was to install the coarse screen into a off-site fabricated site channel which could be mounted on top of the existing balance tank structure. This was installed on site and the rising main connections made, the coarse screen was then installed into it with the screening discharging directly to a skip. Following agreement on the installation sequences with Tecker we ensured the hydraulic constraints of the structure were taken into account to ensure the screen performed correctly and adequate bypass weirs were provided. The fine screens and handling plant were installed in a phased manner to allow the screening at the inlet works to be maintained. Richard Willis, Area Manager for HUBER Technology said “ This difficult project was delivered in conjunction with Tecker and already significant improvements can be seen on site, particularly the coarse screen which is protecting the balance tank and fine screens from the large volume of screenings received into the works”. Screenings build up in balance tank – before screens were fitted New HUBER Wash Press WAP®-L BG4v screenings handling plant, EscaMax® inlet screens and RakeMax® bar screen in the background[...]

[...]Uhldingen-Mühlhofen, Germany In August 2023, after more than two years of construction, one of the most cutting-edge systems for the removal of trace substances was successfully put into operation at the Uhldingen-Mühlhofen association sewage treatment plant. At the heart of the new treatment stage is a combined process of ozonation and activated carbon filtration on a technical scale that had not yet been implemented to date. 24 HUBER CONTIFLOW® GAC activated carbon filters and HUBER TT7 pressure door HUBER supplied the two-lane activated carbon stage with a total of 24 CONTIFLOW® GAC activated carbon filters for reliable biological post-filtration and adsorption. In addition, the upstream ozone reactor was equipped with the proven HUBER TT7 pressure door. As part of ozonation, trace substances are initially oxidised and converted into various transformation products. In the downstream activated carbon filter stage, these products are partly biodegraded and partly adsorbed. Reliable separation of persistent and hazardous trace substances With this additional treatment stage, the largest sewage treatment plant of the Lake Überlingen Wastewater Association now treats up to 230 l/s. Persistent and hazardous trace substances such as medication residue, hormones and flame retardants are reliably separated even before they enter Lake Überlingen. This part of Lake Constance supplies around four million people in large parts of Baden-Württemberg with around 135 million m³ of drinking water each year.[...]

[...]Wackersdorf and Föhren, Germany Sand and water, as the most important components for concrete production, are a basis of modern society. Due to the growing world population and the ongoing construction boom, both resources are becoming increasingly scarce. Smart solutions from HUBER are designed to remedy this by exploiting synergies of ecology and economy, thus promoting sustainable grit processing in the disposal industry. Intelligent and efficient products and solutions for grit processing not only in industrial plants include the HUBER Grit Treatment Process RoSF5, with the HUBER Horizontal Grit Dosing Screw RoSF7, the HUBER Wash Drum RoSF9 and the HUBER Coanda Grit Washer RoSF4. The HUBER Grit Treatment Process RoSF5 The HUBER Grit Treatment Process RoSF5 is the solution for processing grit, mineral waste and wastewater into reusable fractions. Especially the low operating costs and low maintenance requirements of the HUBER machine technology are decisive for the efficient treatment of the input material and thus also for waste management companies to plan economically. In addition, HUBER technology ensures a consistently high quality of the components to be recycled. This in turn provides the disposal company with planning security and can lead to competitive advantages. Used by waste management companies: intelligent HUBER solutions in practice Hammerer Kanalservice GmbH, based in Wackersdorf, Germany, and HP Enders Umweltservice GmbH, based in Föhren, Rhineland-Palatinate, Germany, have recognised the advantages of HUBER products and solutions: both waste management companies have met the steadily growing customer demands for a receiving station for grit from municipal wastewater treatment plants, industrial grit chambers and sewer flushing by taking a HUBER Grit Treatment Process RoSF5 into operation. Hammerer Kanalservice GmbH can accept up to 20 tonnes of raw material per day, process it and sell it profitably on the raw materials market. The processing plant of the waste management company HP Enders Umweltservice is designed for a solid material volume of 1 m³/h. Thanks to HUBER's treatment technology, HP Enders was able to immediately accept the sewer flushing material produced during last year's flood disaster and to make an essential contribution to the restoration of the sewer system. Acceptance of the liquid and solid phase in the receiving bunker of the HUBER Grit Dosing Screw RoSF7 The first step of the process is the discharge of the liquid phase from the tanker vehicles. For this purpose, the operator connects the vehicle via the hose directly to the provided Perrot connection. With the HUBER system, the liquid phase can be reused and recirculated as service water. Cost-intensive fresh water supply is therefore not necessary for the operation of the plant. This is a significant advantage because, compared to municipal wastewater treatment plants, the process water in industrial companies is not available in sufficient quantities and quality and not without additional costs. At the wastewater treatment company HP Enders, the solids are fed directly via the tanker truck into the receiving bunker of the HUBER Grit Dosing Screw RoSF7. Due to the situation on site at Hammerer, the grit as well as the mineral and organic waste is fed from the dewatering site to the HUBER reception bunker by wheel loader. In general, HUBER designs the receiving area according to customer specifications. Alternatively, a crane can be used to feed the waste into the HUBER reception bunker. Use of HUBER Grit Screw RoSF7 and HUBER Wash Drum RoSF9: separation and washing of coarse material The HUBER Grit Dosing Screw RoSF7 integrated in the receiving bunker feeds the material fully automatically into the HUBER Wash Drum RoSF9. In the wash drum, the fraction < 10 mm is washed out by homogenisation. Coarse material > 10 mm is separated by the inclined screening drum, statically dewatered and discharged into the customer’s bin. In addition, a magnet is provided for the separation of metals. Both operators dispose of the coarse materials, and the metals are sold after pre-sorting. Classification, washing and dewatering of the grit in the HUBER Coanda Grit Washing Plant RoSF4 In the next process step, the HUBER Coanda Grit Washing Plant is used. The grit, organic and water mixture (fraction < 10 mm) is fed into the plant via the Coanda tulip with upstream vortex chamber. The flow, which is set into strong rotation by the vortex chamber, is deflected from the vertical into the horizontal direction at the curved surface of the Coanda tulip due to the Coanda effect that occurs and is fed evenly into the container. The solids contained in the flow (grit particles, organic material) are then separated due to the flow diversion combined with flow velocity reduction, dependent upon the particle settling velocity, and sink down to the bottom area of the tank. There, the organic and mineral components are separated. Due to a defined introduction of upwardly directed service water the grit in the lower part of the HUBER Coanda Grit Washing Plant RoSF4 will be fluidised in the upflow, i.e. a locally defined grit fluidised bed is created. Within this fluidised bed the lighter organic particles are separated from the dense grit particles, independent of the particle size. The mineral fraction is then statically dewatered via the discharge screw and can be profitably sold by both companies to the construction industry. Organic and fine grit separation with the HUBER Compact Plant ROTAMAT® Ro5 The effluent from the HUBER Coanda Grit Washing Plant RoSF4 is then treated in the multifunctional HUBER Complete Plant ROTAMAT ® Ro5. Here, the organic and fine grit components are separated from the water stream in a grit channel in only one process step. Both the organic material and the fine grit < 0.2 mm are in turn dewatered and discharged by separate discharge screws. The fine grit is used, for example, in the recultivation or backfilling of pits in opencast mining and can thus be sold at a profit, while the organic components can be used in biogas plants. Sustainable internal water recycling for further reduction of operating costs: effluent from the HUBER Complete Plant ROTAMAT ® Ro5 supplying the Wash Drum RoSF9 The quality of the effluent from the HUBER Complete Plant ROTAMAT ® Ro5 is so good that it can be used directly as wash water supply for the HUBER Wash Drum RoSF9. The remaining wastewater is treated to clear water by the HUBER Dissolved Air Flotation Plant HDF at the end of the process. This clear water is reused as internal process water for the Grit Washer and the Complete Plant. In addition, Hammerer uses the clear water to refuel its suction vehicles. The disinfection plant ensures that the water is free of germs. The internal and external use of clear water reduces operating costs to a minimum, as the cost-intensive supply of fresh water can be dispensed with and, in addition, no wastewater subject to charges is produced. Furthermore, no additional compressed air is required for the saturation system of the HUBER Dissolved Air Flotation Plant HDF, which is another positive influence on the operating costs of the overall plant. Dissolved Air Flotation sludge is dewatered mechanically. The HUBER Grit Treatment Process RoSF5: smart, efficient, sustainable and economical The HP Enders and Hammerer project examples show that the turnkey HUBER Grit Treatment Process RoSF5 is the smart, efficient and sustainable solution for an adaptive system for grit treatment that guarantees a consistently high quality of the recyclable fractions and also saves operating costs. This technologically sophisticated process for grit treatment by HUBER makes an important contribution to the efficient use of resources – and has the nice side effect of being economical.[...]

[...]Belfast, Northern Ireland Huber Technology successfully completed a large £1.2 million project at Duncrue Street, Belfast. The project consisted of supply of equipment and mechanical installation to the inlet works. Huber Technology worked extremely closely with the main contractor Graham Construction and Northern Ireland Water. Project Profile Any project large or small doesn’t happen overnight and in most cases involves a lot of time and effort from a lot of people with different disciplines, experiences and very importantly local site knowledge needs to be involved. Duncrue Street, Belfast was typical of the effort that goes in to making sure that from the very start that a successful and fully functioning project is delivered and all parties and specifications and site requirements are not only met but in most cases exceeded. From the initial enquiry, which was in 2011, regular dialogue has been undertaken between NIW, the design consultant, contractor and Huber Technology. The understanding and appreciation by all of the high elevated and compact inlet works fed by 5 off large screw pumps meant that any issues relating to hydraulics were of the utmost importance. Any failures in this respect would cause extensive damage and untidiness to the surrounding area. In addition to this the existing 6 off coarse and 6 off fine screens on site along with their associated dedicated very long screw conveyors and handling equipment were continually causing issues concerning of not only carryover of screenings but high maintenance and reliability problems. This compounded with the high peaks of loadings in respect of flow and rags meant that the operation of the works involved large amount of manpower and monitoring to take place by NIW. During the long dialogue with all parties Huber Technology had to take into account the very critical site hydraulics and control philosophy requirements for this site along with the right selection of equipment to be used and the associated sizing that goes with this. The coarse screens chosen were used to protect and reduce the solids loading onto the 6mm escalator screens which have one of the highest screenings capture ratios on the market today of 84%. This would ensure that pump blockages and rags were not carried over into the works. Additionally Huber Technology suggested that in place of the very long and maintenance intensive duty standby screw conveyors that a launder system be utilized. This eliminated the need for the very complicated and maintenance intensive screw conveyors and duty / standby change over systems. One of the important aspects of this is that at all stages of the contract, meetings took place to ensure that all parties were aware of the current situation and all parties agreed the way forward. Huber Technology Supplied 6 x HUBER EscaMax® Belt Screen 5000 x 2252 with 6mm perforated plate 6 x HUBER RakeMax® Multi-Rake Bar Screen 4300 x 2250 with 50mm bar spacing 4 x HUBER WAP/SL Screenings Wash Press, size BG12 All Launder Channels DN350 Knifegate valves Equipment EscaMax® Screen throughput 2100 l/s peak flow per screen (5 off duty screens and 1 standby) RakeMax® Screen throughput 2100 l/s peak flow per screen (5 off duty screens and 1 standby) WAP SL max throughput of 15m³/hour per unit (duty + standby for coarse and fine screens each) Launder Channels for a flow rate of 25 l/s Objective A phased installation was crucial on this project to keep the existing works active which had been agreed with Graham Construction and Northern Ireland Water. As you can see from the photos the equipment offered had to also fit within the existing very tight sites hydraulic constraints. Solution The equipment was delivered directly to site where our regional service office based in Portadown, Northern Ireland took over the mechanical installation and commissioning. This proved to be a valuable resource and ensued that the project moved forward and any issues were quickly resolved. The HUBER equipment was successfully commissioned after a 28 day testing period already on 16th October 2013. “Having a strong local presence with a dedicated team and skilled technicians able to deliver this to a consistent high standard of workmanship ensures the project is delivered on time with the highest quality to the client. Huber is a global company with a local presence, the client has a local contact and this means project delivery of any size or complexity can be delivered with minimal fuss. Duncrue Street, Belfast will then be supported throughout its lifetime by the local regional team with prompt response and support to the end user.” commented Kieran Hagan, Regional Field Manager Ireland. Fred Neumann, Regional Sales Manager for Huber Technology also explained “The complexities of this major project were successfully minimized and overcome, due to early engagement with NIW operations/ project manager, consultants, main contractor and their subcontractor. Installation phasing and commissioning problems had minimum impact on the project delivery. This was down to the integrity and commitment of the local Huber Technology installation team.” Product Profile EscaMax® Belt Screen Versatile inlet screen Excellent separation efficiency due to its perforations Reliable cleaning of the perforated plates with a rotating brush Very compact system with minimum space requirements Easy to retro fit into existing channels RakeMax® Multi Rake bar Screen Very high screenings discharge capacity Low headloss Low installation height above ground level even in deep channels Control independent safety system WAP-SL Superior launder Wash Press Volume, weight and disposal cost reduction of up to 85% Compaction up to 50% DR High washed screenings quality of < 20mg BOD 5 /g DR Feeding through a launder channel or directly from a screen or conveyor Quotes “In January 2013 Huber Technology were appointed as a sub-contractor to GRAHAM Construction to supply and install 6 No new course and fine screens at Belfast WwTW under the IWWF Phase 2 Base Maintenance scheme. Works commenced on site in July 2013 and were successfully handed over officially to NI Water in May 2014. The quality of product, workmanship and co-operation provided by Huber for this scheme was of a very high standard.” explained Gerard Mc Keever, Project Manager for GRAHAM Construction. Peter Neeson, Operations Manager from NIW explained in the following 3 bullet points how well the project was carried out: "The reliability of the HUBER equipment has been excellent giving just minor teething problems which have been addressed and sorted effectively by both Huber Technology and the main contractor Graham Construction The screening capture rate, by both the course and fine sets of screens is excellent, evident now by how quickly the skips fill, and the significant reduction in Sewage related debris downstream of the screens. This has meant less pumping and treatment process problems for myself and break downs for NIW M&E. Prior to the new Huber screening system being installed the old one used to pass forward into the works large amounts of sewage debris which often settled out with the sludge’s. This issue drew complaints of pump blockages etc. from the sludge incinerator team (previously NIW) now Veolia water and NIW M&E. Pump blockages are rarely an issue now on site. Screenings handing has been vastly improved by the installation of the Huber WAPs and launder trough system. It replaced a screw conveyor and compaction units which were housed in a purpose built building, this made the maintenance of the old units a dirty and sometimes dangerous job because of space and lighting issues. The WAP’s seem to be well capable of dealing with plug flows of screenings that occur from time to time BWWTW catchment is fairly flat, so in wet weather screenings can arrive at the works on mass after a dry spell, the new WAP’s seem to be very good at dealing with this."[...]

[...]Schwarzenfeld, Germany HUBER supplies the sludge dewatering plant for Naabtaler Milchwerke The dairy company Bechtel recently built its own new industrial wastewater treatment plant. HUBER supplied three screw press units, type Q-Press® 620, for sludge dewatering. Naabtaler Milchwerke GmbH & CoKG, Privatmolkerei Bechtel, founded in 1908, is a large German dairy company based in the Bavarian town Schwarzenfeld. As one of the largest and most important dairies in Germany the company processes more than 1000 t milk a day. Selling to 27 European countries, the company is well established internationally as well. About 1,600 milk producers supply the milk which is processed to make cheese, yoghurt, curd, etc. As the company has been growing, also its water consumption and amount of wastewater generated has increased. The dairy therefore decided in 2016 to build its complete own wastewater treatment plant. The situation on site The industrial wastewater treatment plant clarifies the generated wastewater through flotation and downstream SBR technology. The produced surplus sludge is dewatered by two HUBER Screw Press Q-PRESS® 620 units. The press cake comes out almost solid and is transported away in mobile containers. For internal operational reasons they started with dewatering the flotate sludge only recently but the excellent dewatering and separation efficiencies achieved in the pre-tests seem to be sustainable. Since the dewatering units have been in operation, several truck transports a day have become unnecessary – an important economic advantage for the customer and, moreover, a benefit for the environment as traffic noise and exhaust gases are reduced. First operationa l experience In the initial operation phase, during which the operation of the units was optimised by HUBER SE, a final DR in excess of 18% was reliably achieved with surplus sludge dewatering. The separation efficiency of more than 95% was achieved even without additional filtrate treatment, contrary to competitive systems. The remarkable results for surplus sludge dewatering are only outperformed by the results achieved with flotate sludge dewatering where dream results of more than 30% are achieved. Energy and polymer consumption are low while the separation degree of > 98% is excellent. This is the point from where the operator OEWA will continue, supported by a master student, optimising equipment operation to tease out one or another percent. We wish our customers all the best and are of course still available for them with help and advice. Surplus sludge press 1 + 2 Flotate sludge press 3 DS inlet 0.8% - 2.5% 4.3 - 6.9% DS outlet 18.2% - 19.5% > 30% Separation degree > 95% > 98% ![...]

[...]Berching, Germany At HUBER SE, the 3,000th RakeMax® screen has left the factory at the company’s headquarters in Berching. In the course of its almost 20-year success story, the RakeMax® has become the flagship among screening systems. The HUBER Multi-Rake Bar Screen RakeMax ® , firmly established in the market and first presented to the public at the International Trade Fair for Sewage Technology IFAT 2005, has meanwhile proven itself more than three thousand times on the worldwide market of wastewater technology due to its versatile application possibilities. The “anniversary machine” RakeMax® in its basic version in the main inlet of a wastewater treatment plant. The HUBER Multi-Rake Bar Screen RakeMax® HF with its cranked frame construction is almost indistinguishable from the proven basic RakeMax® machine from the outside. In the case of the RakeMax® J, the screen bars, which are curved towards the channel bottom, result in an overall larger cross-section of the screen through which the flow passes, which leads to lower hydraulic losses. HUBER Multi-Rake Bar Screen RakeMax® HF In the course of continuous development, another innovative screen type based on the successful RakeMax ® was already developed in 2010 in the field of influent screening: the cranked version of the multi-rake bar screen called RakeMax ® HF (High Flow). This screen version consists of a flat and therefore hydraulically very advantageous bottom screening section with a subsequent transition into a steep conveying section. Here, the positive characteristics of the proven RakeMax ® – reliable solids separation and high screenings discharge capacity – are combined with low hydraulic screen loss due to a large and effective bar rack surface of the screen. Due to the extremely flat inclination of the bar rack of 30°, the screen section through which the flow passes is always double the depth of the approaching flow. HUBER Multi-Rake Bar Screen RakeMax® J The HUBER RakeMax ® J is also a modified variant of the proven Multi-Rake Bar Screen RakeMax ® . In contrast to the standard version, the screen bars of the RakeMax ® J are not straight, but curved towards the bottom of the channel. The additional designation “J” is also derived from the shape of the bar rack, as the contour of the screen bars resembles the silhouette of this letter. The screen rake moves along the curvature of the screen bars and describes a segment of a circle in this section. The flat inclination of the rake bars directly in the bottom area results in an overall larger cross-section of the screen through which the flow passes, which leads to lower hydraulic losses as well as to a reduction of the flow velocity in the gaps between the screen bars. For the manufacture of the semi-circular curved screen bars, HUBER uses its many years of experience in the production and use of screens with curved screen bars, such as the well proven HUBER Fine Screen ROTAMAT ® Ro1. In this screen system, the curved bar rack is reliably cleaned in a comparable way by the screen cleaner rake with corresponding meshing teeth. With the two variants RakeMax ® HF and RakeMax ® J described above, disturbing deposits can already be absorbed by the rakes in the lower screen area thanks to the special design. This further optimises the functionality and ease of maintenance of the multi-rake bar screen. HUBER Multi-Rake Bar Screen RakeMax® CF For the first time presented at WEFTEC (Water Environment Federation's Technical Exhibition and Conference) 2019, the leading American trade fair for the water industry, another innovative screen type based on the successful RakeMax ® was introduced: the HUBER RakeMax ® CF (Center Flow) screen combines the advantages of the proven model with the positive features of a center flow screen. The HUBER Multi-Rake Bar Screen RakeMax® – modern screening system of the highest quality class The HUBER Multi-Rake Bar Screen RakeMax ® offers enormous potential in a wide range of applications due to its diverse application possibilities: the above-mentioned RakeMax ® models represent only an overview of the possibilities. One example of the continuous development and variability: the angle of installation. At the beginning of its “career”, the installation angle of the RakeMax ® was 75 to 80° – today it can be used with an angle of 50 to 85°. Its product features, advantages and the resulting application possibilities and solutions make the HUBER Multi-Rake Bar Screen RakeMax ® a modern screen of the highest quality. Thanks to its various designs, the RakeMax ® also opens up a very wide range of applications, enabling HUBER to respond even more individually to customer needs and structural and hydraulic conditions in the future. Despite all the enthusiasm for technology, one essential aspect of machine development must not be left out: user-friendliness. And in this respect, too, HUBER’s RakeMax ® impressively demonstrates that its individually configurable machines offer tailor-made solutions in the field of mechanical wastewater treatment.[...]

[...]Ampfing, Germany The turkey slaughterhouse Süddeutsche Truthahn AG was built in Ampfing in 2002. With 500 employees and 200 contractual fatteners, the independent Süddeutsche Truthahn AG generates an annual turnover of more than 170 million euros. The slaughterhouse Süddeutsche Truthahn AG produces approx. 800 m³ of wastewater daily. This wastewater has already been collected in the production building and treated in the wastewater building with a preliminary screen (curved screen) and a flotation system and discharged to the adjacent wastewater treatment plant. Due to continuous expansion of the production, the existing machine technology could no longer meet the discharge conditions required by the municipality. In addition, a high cleaning and maintenance effort was necessary. Therefore, Süddeutsche Truthahn AG decided to renew the complete wastewater treatment plant in order to be able to reliably and permanently comply with the required inlet conditions. The collected wastewater from the production will continue to be discharged by gravity to the existing pump shafts. In each of these shafts a feed pump has been installed. One pump is used to feed the screening plant, the other to circulate and agitate the solids. A HUBER Drum Screen RoMesh ® 3 with 3 mm perforated plate and an internal and external spray nozzle bar is used as screening system. This is mounted on a base frame to direct the effluent directly into the downstream HUBER Longitudinal Grit Trap ROTAMAT ® Ro6 30. The grit trap is equipped with paddles to remove floating materials (e.g. free grease). The sediments (grit, stomach pebbles) are transported into a container by a discharge screw conveyor. The mechanically cleaned wastewater then flows by gravity into another pump shaft and from there into an agitated mixing and equalising tank (approx. 900 m³). This tank not only serves to homogenise the wastewater but also functions as a safety in case of an accident or for carrying out maintenance work on the wastewater system (buffering of a whole daily quantity). From the mixing and equalising tank a dry-installed centrifugal pump transfers the wastewater via a tubular flocculator to the HUBER Dissolved Air Flotation Plant HDF 10. In the tube flocculator, precipitant (ferric III chloride) and polymer are dosed and neutralised. In the HUBER Dissolved Air Flotation Plant HDF 10 the produced flocs are floated with micro-bubbles (approx. 50µm) and are pushed into the flotate sludge tank by a scraper. The flotate sludge and settling solids are removed at regular intervals by the flotate pump. The disposal route for the flotate sludge is still via a biogas plant. The clear water flows by gravity to another pump shaft and is pumped on to the sewage treatment plant. Later on, a part of the clear effluent from the flotation plant is planned to be reused. However, this requires hygienisation, which will be retrofitted at a later date. The tube flocculator and the switchboard and control system have already been prepared for easy retrofitting of the HUBER chemical dosing system DIGIT-DOSE. In addition to the machines, HUBER SE also supplied the complete piping, the mechanical and electrical installation as well as the switchboard and control system. The plant technology was successfully commissioned in May 2020. Process parameters / inlet values: Nominal flow 60 m³/h Maximum flow 80 m³/h Daily flow 1000 m³/d pH 6-8 COD 7000 mg/l Conductivity 3.02 mS/cm TR 0.71 % NH 4 -N 72.6 mg/l PO 4 -P 47.6 mg/l[...]