Search

[...]News Archive All categories General HUBER News Staff News News for Sludge Treament News for Mechanical Pre-Treatment News for Stainless Steel Equipment New HUBER Videos Service News and Articles News for Industrial Solutions News on Trade Fairs and Events News for Energy from Wastewater News on HUBER Technology Foundation Production News Environmental News News Archive 25/07/2024 Roeselare + Beringen, Belgium Major Aquafin project: 5 HUBER Belt Dryers BT for the thermal treatment of more than 120,000 tonnes of sewage sludge per year HUBER SE will supply a total of five HUBER Belt Dryer BT units to the Belgian company Aquafin for the two sites in... Continue reading 03/06/2024 Munich, Germany HUBER at the record IFAT Munich 2024 The world's leading trade fair for environmental technologies reflects the global growth of the industry with around... Continue reading 24/04/2024 Denver, NC, USA HUBER starts up expanded production in the USA HUBER Technology Inc., the American subsidiary of HUBER SE, officially inaugurated its newly expanded production... Continue reading 20/02/2024 Munich, Germany HUBER SE at IFAT 2024 HUBER will be presenting many exciting products and solutions for drinking water supply, wastewater treatment and... Continue reading 10/11/2023 Taicang, China Federal Environment Minister Steffi Lemke visits HUBER China as part of the 7th Sino-German Environmental Forum 2023 Federal Environment Minister Steffi Lemke visited the Chinese subsidiary of HUBER SE as part of the Sino-German... Continue reading 17/10/2023 Berching, Germany Technical excursion for young water managers at HUBER On Wednesday, 11 October 2023, HUBER SE welcomed about 35 young professionals from the German water industry at the... Continue reading 05/10/2023 Luxembourg Supraregional interest in the wastewater symposium on the removal of micropollutants in Luxembourg On Thursday, 5 October, the wastewater syndicate SIDEST together with HUBER and ProMinent invited to the final... Continue reading 13/09/2023 Berching, Germany Impulses for the growth industry of the 21st century: CECEP China visits HUBER SE together with Umweltcluster Bayern As part of its membership in the Bavarian Environmental Technology Cluster, HUBER in the person of Chief Sales Officer... Continue reading 25/07/2023 Regensburg, Germany Energy from Wastewater: Presentation of HUBER ThermWin System with Bavaria's Minister of Finance at the House of Bavarian History Regensburg Bavaria's Minister of Finance and Home Affairs Albert Füracker visited the Museum of Bavarian History in Regensburg... Continue reading 19/07/2023 HUBER Technology - Safe Access Solutions HUBER offers a wide range of products in their safe access solutions range from pressure tight doors, access covers,... Continue reading 18/07/2023 HUBER Technology deliver their innovative DfMA Sludge thickener S-DISC containerised unit to a site in DCWW HUBER deliver and install their innovative DfMA containerised Sludge thickener solution. Continue reading 18/07/2023 HUBER’s Space-Saving carbon reduction solution HUBER’s CarbonWin® solution incorporating the HUBER Drum Screen Liquid and HUBER Sludge Thickener S-DISC Continue reading 1 2 3 4 5 6 7 8 9[...]

[...]Kodersdorf, Germany Kodersdorf in Saxony lies on the River Weißer Schöps and is nestled in a picturesque landscape between the Königshain Mountains and the Upper Lusatian Lakeland, in the immediate vicinity of Görlitz. The sewage treatment plant is located in the industrial estate; its capacity was expanded from 4,500 p.e. to 7,500 p.e. in 2023. The plant operates using aerobic sludge stabilisation. As part of the capacity expansion, a new pre-treatment system was installed, comprising a HUBER Complete Plant ROTAMAT® Ro5 100 and a HUBER Rotary Drum Fine Screen ROTAMAT® Ro2 1000/3. A second sludge storage tank and a HUBER Screw Press Q-PRESS® 440.2 for stationary sludge dewatering were also installed, creating the conditions for modern sewage sludge drying. Subsequently, the plant was equipped with a solar sludge drying system as a sustainable and future-proof solution. Since its successful commissioning in April 2025, the system has been in continuous operation throughout the first drying season, proving itself to be reliable and stable while delivering consistently excellent results. Premiere of the HUBER Sludge Turner SOLSTICE® FloorRunner The municipality of Kodersdorf installed this new, fully automated plant design, enabling unmanned, autonomous operation. While the plant does require monitoring, adjustment and maintenance, the drying process itself runs entirely without staff. The entire process, from low-viscosity sludge to finished dry granulate, is automated. This significantly reduces the workload for operating staff and makes the Kodersdorf sewage treatment plant particularly future-proof, especially in view of the growing shortage of skilled workers. Details of the process A HUBER Screw Press Q-PRESS® 440.2 dewaters around 150 tonnes of dry matter annually to approximately 20–23% dry residue. The approximately 730 tonnes of dewatered sewage sludge are then conveyed by a HUBER Screw Conveyor Ro8 TSF to the solar sewage sludge dryer. There, the HUBER Sludge Turner SOLSTICE® FloorRunner takes over; Kodersdorf was the first site to use this newly developed model. The machine spreads the sludge across a 660 m² drying area. The drying hall is a 68 m long, 12 m wide greenhouse structure equipped with controlled fans. Through the combination of gentle sludge turnover by the FloorRunner air turbulence from the fans accumulated heat in the greenhouse and direct sunlight the sludge achieves an annual average dry residue of over 80%. Approximately 550 tonnes of water evaporate in the process each year. This leaves around 180 tonnes of dry granulate with a density of approximately 0.8 kg/l. A HUBER Screw Conveyor Ro8 TSD and a bucket elevator are used for automated sludge discharge. The dry granulate is then distributed into two containers by the elevator. Consistent use of HUBER machinery ensures a perfectly coordinated system. A particular technical advantage is that the FloorRunner can transport sludge in a targeted manner, thus enabling the feed and discharge points to be arranged compactly on the same gable side. This allowed the greenhouse structure to be built right up to the property boundary in a space-saving manner, without the need to construct a rear access road. Proven technology and successful real-world operation The FloorRunner was extensively tested in a prototype plant at HUBER SE’s headquarters prior to its first delivery. All findings from these tests were incorporated into the system design for implementation in Kodersdorf. Representatives from the engineering firm IBOS and the Weißer Schöps/Neiße Administrative Association had the opportunity to observe the system’s functionality and efficiency first-hand in advance. Since commissioning in April 2025, the plant has consistently produced outstanding results in real-world operation. The first full drying season was completed without any significant incidents. The plant is performing exactly as planned, confirming the confidence placed in HUBER’s mature, highly automated technology. Sludge turner now available worldwide Following the successful tests and impressive performance in Kodersdorf, HUBER SE is now offering the HUBER Sludge Turner SOLSTICE® FloorRunner worldwide. The solar sewage sludge drying plant in Kodersdorf serves as an important reference installation. The consistently high quality of HUBER products, combined with their high operational reliability and autonomous plant operation, is sure to continue impressing customers around the world.[...]

[...]Novelty – HUBER Sludgecleaner STRAINPRESS® 420 With nearly 1000 produced machines, the HUBER Sludgecleaner STRAINPRESS® 290 is one of the most proven HUBER products. To complement or as an alternative to fine screens installed in channels, the STRAINPRESS® permits the separation of solids even from closed pipeline systems. In contrast to conventional screening systems, the STRAINPRESS® not only separates solid material, it also dewaters the material before discharging it. Typical screen perforations used for screening primary sludge are 3 mm or 5 mm, with the screenings being dewatered to dry substance contents of 35 to 45% already in the discharge of the STRAINPRESS®. To adjust to varying sludge qualities and solids properties, the screw speed and contact pressure of the dewatering unit are regulated automatically according to the pressure conditions and the motor load of the STRAINPRESS®. It is, however, not only the screen perforation that is easily adjustable. The dewatering area can also be adjusted to different screenings properties due to its modular design. The STRAINPRESS® is therefore suitable for coarse screening of biosubstrate as well as for separating fine plastic particle from the fermentation product of biogas plants. With the use of the newly developed size 420 of the HUBER Sludgecleaner STRAINPRESS® presented now, it is possible to separate and dewater up to 2000 l/h screenings with sludge throughputs in excess of 150 m³/h. The new unit size is of course suitable to be integrated into pressure lines completely odour-encased easy to retrofit with screen perforations from 2 mm to 10. All components of the new system size are made of corrosion-resistant stainless steel, as with all other sizes. To minimize wear, the outer edges of the screw shaft are equipped with a replaceable protection on a carbide basis.[...]

[...]Redesign reduces the hazard potential Whether we develop new products or redesign existing machines, we always do this considering also the safety aspects that are important to minimise the hazard potentials when handling our products as required by the Machinery Directive. How important it is to pay special attention to product safety could be seen only last year on a competitor’s solar sewage sludge dryer installation in Bavaria where a tragic accident happened. This was even more reason for us to once again look very thoroughly at our safety systems and further improve them. When we recently redesigned the HUBER Sludge Turner SOLSTICE®, we completely revised the safety system of the entire sewage sludge drying plant. The innovative heart of the solar sewage sludge dryer The HUBER Sludge Turner SOLSTICE® is the innovative heart of the solar sewage sludge dryer and operates in a greenhouse both as a sludge turning and sludge transporting system for the sludge to be dried. Depending on the different specific conditions on site (throughput, air moisture, inside and outside temperature, ...), the especially developed control unit controls the travel and rotation of the HUBER Sludge Turner SOLSTICE®. New feature of the safety concept The new feature of the safety concept is that the access to the operating area of the automatically operating machine is consistently monitored electronically. Whenever somebody walks into this area, the machine will be shut down by the emergency circuit. This prevents severe injury. It was further of great importance for us to ensure that the safety devices cannot be bypassed and will not be perceived as uncomfortable or disturbing. Their new design is therefore still very functional and user-friendly. The entrance area where the wet sludge is fed is equipped with a 3-beam light grid that allows the operator to directly inspect the machine any time without interrupting the operation cycle of the HUBER Sludge Turner SOLSTICE®. Feeding the sludge with a wheel loader is safe and easy. The interface between the man-operated machine (wheel loader) and the automated movement of the sludge turner is controlled by the light grid. The wheel loader can drive directly into the operating area and bring in sludge without having to remove fences or similar installations before. It is at the same time ensured that the HUBER Sludge Turner SOLSTICE ® does not start to move. The rear gates and the maintenance doors are equipped with monitoring sensors. When the doors or gates are opened, the emergency circuit will be interrupted. Signs are additionally mounted at all mechanical entrances to warn of potential hazards. The new safety system will be applied for the first time in the project Denizli in Turkey, the biggest solar sewage sludge drying project by now that will be equipped with HUBER machines. An annual amount of 25,000 t press sludge will be dried on the Denizli site in the future by 8 HUBER Sludge Turner SOLSTICE® units, size 11. The second project where the new safety system will be used is not 2,000 km away like Denizli but only 10 km from the HUBER headquarters, on STP Freystadt. A solar sewage sludge drying plant will be built there, for which HUBER will supply a complete solution.[...]

[...]Applications and Benefits A tailored solution to suit any application: Industrial and municipal applications Primary and secondary treatment stage Protection of membrane plants Replacement for primary settlement tank Load reduction in the biological treatment system through reduction of COD / AFS Screening in the inlet to power plants Treatment of cooling water circuits Brewery wastewater River and sea outfall Surface and river water screening The benefits are obvious Economical channel/machine sizing Low life-cycle costs Easy maintenance and operation Automatic, rotating high pressure system with a very low water consumption (0.25 l/s) For channel or tank installation Maximum corrosion protection through stainless steel design and acid treatment in a pickling bath The HUBER screens have a long tradition. The well-proven ROTAMAT® machines have successfully been installed all over the world since more than 30 years. To meet the ever changing requirements and the various site conditions, HUBER has continuously further developed its wastewater screening products. A result of this development process are the products of the ROTAMAT® family as well as the well-known STEP SCREEN® units and the screens of the MAX-family. The demand of the market for ever improved separation efficiency and at the same time higher throughput capacities was the incentive for HUBER to develop the HUBER Drum Screen LIQUID. The situation Mechanical pretreatment is required for both municipal and industrial wastewater in order to remove coarse materials and separate floating, settling and suspended solids. Depending on the method of wastewater treatment that is applied, the mechanical pretreatment system must fulfil different requirements in terms of separation efficiency. Special plants which operate according to the MBR principle put the highest demands on the mechanical pretreatment system as all coarse material needs to be removed. A cost-efficient solution must not only achieve the requested separation results, it must also provide high throughput capacities combined with maximum operating reliability. Our solution: HUBER Drum Screen LIQUID The HUBER Drum Screen LIQUID is a machine that is available in different designs and suitable for numerous applications of solids-liquid separation. Depending on the specific application requirements the horizontal drum is covered with a mesh, wedge wire or perforated plate. Function principle The characteristic feature of the HUBER Drum Screen LIQUID is its screen basket which is horizontally installed in the channel or in a tank. The wastewater to be treated flows through the basket from inside to outside. Whilst the wastewater flows through the open front into the screen basket, solids are retained within the drum. A special sealing between the channel and the front-end screen basket opening prevents unscreened wastewater from passing through the screen basket. The solids settling on the drum surface lead to gradual blinding of the surface. As a result, the water level upstream of the screen rises. When the predefined maximum water level has been reached, the screen basket starts to rotate slowly around its axis to clean its surface. At its crown a spray nozzle bar sprays water onto the drum surface from outside to remove the solids and flush them into a trough inside the drum basket from where the screenings are discharged by gravity. The screenings can optionally be pumped to a higher level. The HUBER Wash Press WAP® liquid is available for further treatment of the separated screenings. The wash press dewaters the screenings prior to discharging them into a container. This reduces the load on the sludge treatment system. High pressure cleaning For preventive drum cleaning an innovative automatic high pressure system can be integrated as an option. The spray nozzle head rotates automatically due to the water pressure and moves linearly along the full length of the screen basket to clean the complete basket very efficiently. Water demand and operator attendance are reduced to a minimum. Reliable sealing Every system is only as good as its sealing system in the inlet of the machine. A special PU sealing is therefore integrated in the HUBER Drum Screen LIQUID to ensure that no unscreened wastewater can pass through the screen and constant separation results are reliably met. Maintenance-friendly chain drive The HUBER Drum Screen LIQUID is equipped with a unique self-adjusting bearing unit with a chain drive. The bearing is water-lubricated and made of highly wear-resistant fibre composite material. The bearing can be replaced without dismounting the machine. Technical data The machine is completely made of stainless steel and pickled in an acid bath for optimal corrosion protection and minimised maintenance requirements. The compact unit can be supplied in a tank or installed directly in the channel. The HUBER Drum Screen is available in 4 sizes for throughput capacities up to 10,000 m³/h wastewater. Drum diameter 2.2m Drum length up to 4m Perforated plate 1.5 - 3mm Perforations of Star design 1 - 2mm Mesh sizes 0.2 - 0.75mm Bar spacings 0.5 - 3mm Slide Show: Model variations of the HUBER Drum Screen LIQUID Wedge wire: Drum Screen LIQUID ww Wedge wire sizes 0.5 / 1 / 2 / 3 mm Solids retention up to 10,000 m³/h per machine Typical applications: Mechanical pretreatment on sewage treatment plants, industrial solids-liquid separation Perforated plate: Drum Screen LIQUID pp Perforations 1.5 / 1 / 2 / 3 mm High separation efficiency and retention of fibres and hair Typical applications: Protection of membrane filtration plants Folded perforated plate: Drum Screen LIQUID Star Perforations 1 / 1 / 1.5 / 2 mm Increased screen surface for higher throughputs, high separation efficiency and retention of fibres and hair Typical applications: Protection of membrane filtration plants Fine mesh fabric: Drum Screen LIQUID Mesh Mesh sizes from 0.2 up to 0.75 mm Maximum separation efficiency and reduction of COD and BOD by 20 – 40% Typical applications: Load reduction in the preliminary treatment stage, replacement for primary settlement tank, sea and river outfall applications[...]

[...]We help you to get rid of fat and grease! Grease concentration in wastewater is usually measured by the content of lipophilic substances. A laborious extraction process is necessary to obtain this analytical value from a composite wastewater sample. Grease contained in wastewater is normally present as a dispersed (suspended) fraction. A small portion of the grease is contained as an emulsion, this can be explained by the use of solvents and rinsing liquors. Depending on the type of sewer (length, drop structures, number of pump stations, screens) it is differentiated between a coarse-particle phase (> 1 mm) and fine-particle phase of dispersed grease. Depending on their size and shape the particles can be separated easily, reasonably or only with difficulty in an aerated longitudinal grit trap with grease pocket. A definitive separation rate can however not be quantified, In contrast to the grit trap. Large calm surfaces are positive for efficient grease separation. They permit dispersed particles to slowly rise towards the surface due to their density difference and accumulate without redispersing. This method is practised in conventional longitudinal grit traps with lateral grease pocket with more or less success. On the one hand, a certain flow roll is necessary as grease transport medium. On the other hand, the generated secondary flow roll in the grease trap must not be too strong. With our patented Combi Grit Trap with Hydro Duct flow system we have managed to find a solution to this Sisyphean task. The innovative feature of the Hydro Duct grit trap system, which we presented at IFAT 2005, is the combination of an aerated and unaerated grit trap and thus provides the advantages of both aerated and unaerated grit traps in one plant. Fine bubbles of air are blown into the aerated area and induce a water roll. Organics are well kept floating and dispersed fine particles are floated up at the same time. The particles agglomerate and form a foam layer that moves slowly towards the outlet. The aerated chamber is followed by an unaerated chamber in which laminar flow conditions prevail. Both chambers are separated by a scum board. A high separation rate of > 95% of the grit fraction size 0.20 – 0.25 mm is achieved without problems in this chamber through exactly defined velocities. The relative velocity is set to ensure that the majority of organic particles is still transported out of the grit trap plant along with the wastewater. Due to the large surface in the unaerated chamber all dispersed coarse grease particles rise to the water surface in this chamber and mix with the foam of the aerated chamber. A scum board is installed in front of the outlet to prevent drifting off of the floating matter that accumulates in front of the scum board. From time to time, an integrated automatic grease scraper carries the floating material into a grease chamber (see fig. 2). An eccentric screw pump is installed below the grease chamber and conveys the contents into a separation/grease tank or into a raw sludge chamber. Integrated grit conveying and grit classifying screws dewater the separated grit trap material and transport it towards the discharge where the material is dropped either into a container or an appropriate downstream grit washer. Due to the new large grease trap system in our Hydro Duct type system the separation of dispersed coarse grease particles can be improved significantly. The grease trap system described above is implemented in all our HUBER Complete Plant ROTAMAT ® Ro5 HD units. Come to where experience meets innovation![...]

[...]Berlin, Germany New base in the capital: HUBER SE is expanding the locations of its Global Service in Germany and is commissioning a new base in Berlin. The official opening of the base in the capital took place on 1 December 2021 and, in addition to the expansion of regional capacities, will primarily offer HUBER customers shorter distances and even faster response and reaction times for on-site enquiries in the future. Over 1,200 square metres of floor space: even more productivity and flexibility for HUBER Service In addition to office and social facilities, the more than 1,200 m² site area also includes a production hall that provides sufficient space for a spare parts warehouse and prefabrication work and thus contributes significantly to improving the productivity and flexibility of HUBER Service's processes. At present, five highly qualified and permanent employees expand the range of services offered by HUBER Service to include the highest quality in strict compliance with the manufacturing and welding standards DIN EN 1090 and DIN EN ISO 3834. Even better service and more customer proximity Personal contact and the geographical proximity of the contact person also for business partners in northern Germany have high priority for HUBER Service. The opening of the new service base in Berlin is HUBER's response to its continuous growth. At the same time, HUBER sees the investment as a commitment to the region, which will also benefit in the medium term from a successive and variable increase in service staff. This consistent next step in the further development of HUBER's after-sales service activities brings the company even closer to its customers, enabling a detailed analysis of the market's needs and thus also the continuous expansion of service competencies.[...]

[...]Plymouth, England Background Site operators at Plymouth Central STW wanted a more reliable and less labour intensive option to de-watering than a centrifuge. South West Waters requirements were lowest WLC, low operator attendance and simple operation South West Water had been looking at alternative dewatering technologies with lower TOTEX to potentially replace existing veteran centrifuge assets and tasked preferred contractor Kier to offer solutions for the Plymouth Central and Maer Lane WwTWs. Plymouth Central serves a Population Equivalent of around 320,000 and, being on a coastal port receives higher proportions of saline and fat than other in-land works typically do. Maer Lane serves a small population on the outskirts of Exmouth On site previously was a 2002 centrifuge unit with 45 kW main drive and 7.5 kW back drive which operates from around 6:30 AM to 9 PM as required, running at around 30 m³/h. Kier undertook the process evaluation which compared Whole Life Costs, operational requirements and product support. Solution HUBER worked with Kier, undertaking trials to demonstrate the machine to SWW operations who wanted to touch and feel the machine and satisfy them that the machine was simple, robust and easy to operate. The trial data not only satisfied SWW that this - first of its kind in their region - was what they needed but provided hard data to confirm WLC in terms of power and chemical consumption as well as enabling accurate sizing. HUBER Screw Press sludge dewaterers are designed to provide efficient, fully-automatic, mechanical dewatering of sludge once the diluted polymer dose into the feed sludge has been adjusted correctly to provide a suitable flocc. The enclosed design serves to reduce the odours, noise and the potential requirement for operator attendance due to spills that can be associated with other dewatering technologies on some sites. The low operating speed of the screw presses reduces wear and energy demand. For the trial to take place, a HUBER Screw Press 280 was tested on indigenous co-settled chemically-assisted lamella-settled DensaDeg Primary and humus-like BAFF secondary sludges from the Plymouth Central site as well as imported similar sludges from the site at Maer Lane WwTW. The feed sludge during the trial varied from 4.6 to 5.15% DS with an average active polymer usage of 4.7-4.8 kg/tDS with an average cake dryness of 33% and minimum of 28.6%. As a comparison the existing centrifuge was using around 8-10 kg/tDS of polymer based on a throughput of 25-30 m³/day to produce cake at around 23%. A sample of the trial results from a single day are shown in the adjacent table. Following the successful trial Huber Technology were asked to tender for the supply of the permanent units for both of the sites at Maer Lane and Plymouth Central. The sludge feed at both sites was specified as 4.5% DS with a feed rate at Maer Lane of 10.22m³/hr and at Plymouth Central a feed rate of 35.55 m³/hr. The HUBER Screw Press 800.2 model was selected for both sites with a single unit required at Maer Lane and three units required at Plymouth Central. Following a successful tender submission Huber Technology were awarded both projects in January 2019 with installation and commissioning due to take place in July 2019. Client Benefits SWW now have an alternative to centrifuges with a demonstrable WLC benefit together with Operators who have bought into the equipment and are supportive of the change. 50% polymer saving 80% power savings (typical) 6 fold maintenance savings are achieved[...]

[...]New pressure doors? Hasn't HUBER successfully manufactured a large number of pressure doors for a long time already? That's right – since the early eighties about 250 to 300 a year. What new features would make them better? The pressure doors (TT7) we have produced by now are laid out for a limited static load of up to 10 m water column. The feedback we get from the market, from suggestions, predictions or even concrete inquiries, we know that this pressure resistance will not be sufficient any more for many future building projects. A pressure resistance of up to 30 m water column could be required for some projects, such as for pumping stations, pressure increasing plants in drinking water supply projects, locks or stormwater overflow tanks. Reason enough to work on a solution! The solution has the internal name "TT7-30" – a pressure door that is absolutely tight up to 30 m water column. The development phase for the new door started at the beginning of 2012 and held a lot of challenges for everyone involved in the project. The HUBER product management together with the construction department designed a new door based on the long-term experience with manufacturing pressure-tight doors. A special construction had to be developed which, due to its distinctive design and appearance (see picture), offers a substantially improved resistance to high water pressures. The construction was statically calculated and tested to meet the diverse relevant standards, regulations and guidelines. After a prototype had been manufactured and successfully tested, the first order could be realized: As part of an order placed by Gelsenwasser AG for the water works Echthausen we delivered three doors of the new, innovative type with size 800x1200 mm. The new product impresses with numerous innovative features: Absolutely tight up to 30 m water column. The central lock allows for easy and quick operation of the door. Due to its special design the door can easily and hygienically be cleaned in the course of regular elevated reservoir cleaning. Especially robust seals have been developed with regard to dead water zones. The seals of the TT7-30 doors are certified to KTW and DVGW W270 standards which are of fundamental importance in the field of drinking water supply.[...]

[...]Bad Orb, Hessen, Germany The further developed HUBER Screw Press Q-PRESS® was presented for the first time at IFAT 2016. The first units were installed soon and have meanwhile been in operation for more than a year. Now, it is time to review the operational experience gained on site against development targets. In April 2016, a new sludge dewatering system for STP Bad Orb was put out to tender to replace a chamber filter press. Extensive on-site testing was done before in 2015. During the tests, the screw presses turned out to be the most suitable dewatering solution. HUBER offered the newly developed HUBER Screw Press® 620.2 and could win the tender which included a screw press, the electrical control sytem, conveying technology, coagulant agent plant for simultaneous conditioning of liquid and powdery polymer, and a solution for bridging the time of installation. The screw press was installed and successfully put into operation in October 2016. The operating staff on site had already time to get familiar with the operation of the machine during the installation phase when a mobile Q-PRESS® 440 unit was operated on site as a transitional solution. Performance data of the HUBER Screw Press Q-PRESS® 620.2 Throughput: 5 – 7 m³/h, 100 – 210 kgDR/h Polymer demand: 15 kg/t; 1:1 mix of powder/liquid Dewatering results: 24 – 27 % DR Separation degree: > 97 % Screw rotation speed: 0.3 - 0.4 rpm Power consumption: 0.5 – 0.8 kW The Q-PRESS® on STP Bad Orb has already dewatered approximately 7000 m³ sludge since when it was put into service. We would like to thank the operators for their cooperation and excellent support when we were testing new drive technologies on the screw press. In addition to the installation in Bad Orb, another eight HUBER Screw Press Q-PRESS® 620.2 units have been installed successfully. HUBER Screw Press Q-PRESS® – features of the new model Easier maintenance and reduced space demand Axially dividable filter baskets are optionally available, they facilitate maintenance work significantly. Massive components, such as the screw shaft and some filter elements, can now remain in the machine during inspections. Much less space and time is therefore required for maintenance. Even if non-dividable filter baskets are used, space requirements for maintenance on the installation place are now reduced to the minimum that is necessary for machine operation and inspection. Efficient screen surface cleaning inside and outside for improved screening performance The outer surface of the cylindrical filter baskets was previously cleaned by rotating the filter baskets along a stationary nozzle bar while the dewatering process was interrupted. The new screw press offers continuous dewatering without interruptions through a rotating washing system that rotates around the filter baskets for periodic cleaning. Dewatering degree and machine throughput are no longer influenced by interruptions or starts/stops of the washing systems. In contrast to many competitive machines the rotating washing system allows for independent cleaning of the filter surfaces of the inlet and press zone. In addition, the upper and lower filter halves can be cleaned separately so that only the contaminated filter surface sections are cleaned. Filter surface sections which have been cleaned cannot be contaminated again by wash water that runs down.This system significantly reduces the water demand for filter cleaning and additionally minimizes rewetting of the sludge cake through washing. Reliable cleaning of the inner screen basket surfaces is just as important as cleaning of the outer surfaces. The inner surfaces are typically cleaned by a scraper that is mounted on the screw flights and wipes clear the inner filter surface as the screw shaft rotates. The efficiency of this scraping & wiping operation has direct influence on filter resistance and the water discharge velocity of the screw press. Both have an influence on dewatering degree, throughput, filtrate quality, polymer demand, and thus on the operating costs for dewatering. After extensive development and test series HUBER screw presses are now equipped with an innovative, especially designed patented scraper material which cleans the inner filter surface much better and more reliably than customary brushes and a lip seal system. Larger screening surface for increased hydraulic throughputs What is new is that the open filter surfaces in the filter baskets have been increased by up to 100%. The individual screen sizes are therefore able to process significantly higher hydraulic loads without placing higher loads on the filter surfaces and thus the filtrate, and without increasing polymer demand. More efficient drives for improved performance with reduced energy costs New drives exceed current energy efficiency standards. They save not only electricity costs, they also offer plant operators the possibility to operate their sludge dewatering unit much more flexibly due to significantly wider motor speed ranges. Inclined installation for improved dewatering efficiency For good reasons, the basic appearance of the press, the inclined installation, remains as it has always been. The inclined design ensures that screenings removal units can in most cases be connected without the need to place it on an additional elevation. Furthermore, the inclination of the filtrate chambers prevents sedimentation and eliminates the need for manual cleaning work. The decisive advantage of the inclined installation is improved dewatering efficiency. The separated filtrate flows off from the screen basket by gravity, against the flow direction of the press sludge. Rewetting of hydrophilic sludges through filtrate is thus reduced and the dewatering degree improved. Moreover, inclined installation facilitates especially the start-up procedure of the screw press.[...]