Search

[...]Rednitzhembach, Germany HUBER was awarded the contract in early 2024 to supply and install a HUBER Rotary Drum Fine Screen ROTAMAT® Ro2 with a downstream HUBER Wash Press WAP® for renewing the STW’s screening system. These have now been in operation since the end of August 2024. Technical challenge and solution in the screen channel A particular challenge in this project was that the screen channel had to be widened from 600 mm to 1000 mm in the area of the screen basket. In order to minimise conversion time, which included demolishing the old channel and continuing to operate the sewage treatment plant with a rental screen system, a prefabricated stainless steel channel was delivered in advance and installed in the area of the screen basket. The entire project, from dismantling and conversion to commissioning, was thus completed in less than two working weeks. Initial operating experience with the new plant technology Operations managers Mr Strauß and Mr Rühl report on their experience with operating this new technology in comparison to the previously installed screening system (double bar screen with downstream screenings press): What were the main reasons for replacing the old screening system? Ultimately, there were two main reasons that led to the complete replacement of the installed system. The first reason certainly lies in the technical process of the plant. Firstly, the old screening system was unable to deliver the required throughput during mixed water peaks, resulting in the emergency bypass being activated. Secondly, the bar spacing was too large for the composition of our wastewater, so that the contamination in the other areas of the sewage treatment plant, such as floating scum on the aeration and secondary clarification tanks and screenings volume at the coarse screen in the return sludge lifting station, was much too high. Of all areas, this was most intense in the manually cleaned coarse screen (e=20 mm). Sometimes, this had to be cleaned by hand twice a day. Despite the relatively coarse bar spacing, the screenings accumulation here was almost as high as with the old 6 mm inlet screen! Another reason is the ageing equipment and the associated problems with repairing and procuring the necessary spare and wear parts. The newly installed HUBER fine screen with downstream screenings wash press has been in operation since the beginning of August 2024. What has changed fundamentally since then, in your opinion? Everything, really. There are no floating scum layers visible in the aeration and secondary settling tank or in the return sludge area. The screen separation efficiency has increased enormously. Under the same boundary conditions, approximately two to three times as much washed and dewatered screenings are now produced. The time required for manual cleaning of the coarse screen in the return sludge lifting station has been significantly reduced, from previously about twice a day with a high volume of screenings, to now once a week with a very, very low volume of screenings. A small bucket is sufficient for this. How satisfied were you with the advice received on improving the operating situation and project planning for the plant, and the work carried out? It was delivered exactly as promised – exactly as one would ideally imagine. We would like to thank everyone involved in the project, especially the Rednitzhembach sewage treatment plant employees, the plant manager Mr Strauß, and Mr Rühl, for placing their trust in us and for their excellent cooperation.[...]

[...]Bitburg and Kyllburg, Germany A HUBER Service partnership on the basis of our service and maintenance contracts has meanwhile become a much-demanded HUBER Service product worldwide, especially when it comes to absolute security for plant operation yet low and calculable operating costs! Preventive maintenance and inspection on a manufacturer quality level and their benefits for the customer, such as high operational reliability high machine performance calculable operating costs maintenance of value and investment security professional and reliable support of the operating staff on site detailed documentation and report of results after each maintenance for the plant managers are factors which are gaining in importance, both in Germany and abroad. Individually and flexibly designed HUBER service systems – a suitable solution for every customer Due to their modular design and flexible solution concepts HUBER service and maintenance contracts can be optimally tailored to suit customer needs and help to maintain customer satisfaction in the long term. Meanwhile, nearly 1000 sewage treatment plants, with in total 2000 machines in Germany alone, make use of the extensive benefits! No matter which branch, whether common municipal sewage treatment works or industrial plants, sewage sludge drying plants, dairy producers, automobile manufacturers, or even jails – they all went for a HUBER Service partnership, with good reason as one of our customers reports below! Example: Expanded HUBER service and maintenance contract of Verbandsgemeinde-Werke Bitburger Land – branch Bitburg and Kyllburg We are especially happy about one of our major HUBER service and maintenance partnerships with Verbandsgemeinde-Werke Bitburger Land which was signed in November 2015 after a merger of the municipal utilities and is now one of our most extensive HUBER service and maintenance contracts! With 20 sewage treatment plants and a total of 23 machines this maintenance contract includes both older machines of the year 1992 and completely new ones installed in 2014. This shows that continuous systematic maintenance from the manufacturer ensures that a very long operational life is achieved and the maximum machine lifetime can thus be utilized by plant operators. And there is another decisive advantage we could offer our customer for his new machines: extended warranty to 4 years according to VOB/B (German Construction Contract Procedures) instead of the usual 2 years. This bonus can be granted according to VOB if the customer commissions HUBER to take over the maintenance of new machines for the complete warranty period. HUBER service engineer Torsten Winzer during regular annual maintenance on one of the sewage treatment plants that is included in the service contract HUBER service engineer Torsten Winzer during regular annual maintenance on one of the sewage treatment plants that is included in the service contract Plant manager Frank Müller points out the great benefits customers get from HUBER service and maintenance contracts: "For us, one of the greatest benefits from a HUBER service and maintenance contract is the know-how transfer that takes place when our machines are maintained by competent HUBER service engineers. Every time they are on site our own staff can learn so much, they can watch and discuss with them decisive details of the complex technical machines and plants. We are very satisfied with the quality of maintenance we have got form the HUBER service engineers over many years already and impressed by their expert knowledge. Beyond the contractual maintenance it is very important for us that the HUBER service consultant Erwin Wagner is available for us. He provides competent additional advice and has efficient solutions to any problems and requirements on our sites. Because of the high number of plant and machines we are responsible for it is also very important for us to have a personal contact in the HUBER Service centre and thus get everything from one source. This makes it so much easier for us. In addition, the failure rate has considerably improved due to the systematic plant maintenance provided by HUBER, we have hardly had any noteworthy failures during all this time! This gives us a maximum of plant availability. Another plus factor for our decision to sign a HUBER service and maintenance contract was the extended warranty of 4 years. In summary, we must says that we are very satisfied with the services provided by the HUBER service team and can only recommend to other plant operators to make us of the same extensive benefits!"[...]

[...]The containerised HUBER S-DISC sludge thickening plant was a design concept that HUBER GB developed during the COVID lockdown, achieving the first sale in 2022. It is not a trial unit but a fully WIMES compliant maintainable package plant that includes the S-DISC thickener, feed and discharge pumps, a bunded poly make up & dosing unit, lighting and ventilation and a WIMES 3.04 control panel built in -house to each water company specification. Initially available with a S-DISC size 1 with a capacity of up to 18 cu.m/hr, we are now able to offer the S-DISC size 2 with a capacity of 38 cu.m/hr. Features & Benefits The simplest, most robust & compact thickener on the market Lowest physical & Carbon footprint Up to 40% lower capital costs & 25% lower operating costs Low energy, chemical & washwater demand = Lowest WLC Plug & Play solution = Reduces installation time & H&S risk Low operating & maintenance time Rapid deployment as a temporary solution for short / long term hire 90% reduction in tankering costs 10 UK Installations[...]

[...]Optimisation of existing treatment concepts through adapted machine technology Industries that produce wastewater with above-average pollution levels must either pre-treat it before discharge into the sewer or treat it completely biologically before it can be returned to water bodies. The relevant regulations result from the Water Resources Act, or from local statutes and environmental legislation. Since these industries can usually provide wastewater treatment with comparatively few resources, necessary optimisations are often not undertaken, and this is reflected in particular in increased operating and maintenance costs. Process Technology HUBER solutions for reduction of operating costs Regular evaluation of the plants often reveals a wide range of optimisation and cost-saving potentials: Optimisation of the mechanical preliminary treatment system Installation or optimisation of chemical-physical wastewater treatment Installation or optimisation of secondary treatment (filtration, flotation) Use of wastewater heat In principle, the more solids and organic matter that can be removed by mechanical and physico-chemical processes, the lower the operating costs of wastewater treatment. In contrast, aerobic treatment is significantly more expensive because of the energy costs. In case of high amounts of dissolved organic matter, anaerobic treatment may also be useful. HUBER has suitable machine technology and long experience in industrial wastewater treatment. Thus, previously undiscovered potential for improvement can be uncovered. Prior laboratory and pilot tests are used to determine the potential very precisely in advance. In principle, the entire HUBER product portfolio is used, but especially the HUBER Dissolved Air Flotation Plant HDF , the HUBER Screw Press Q-PRESS® , as well as the HUBER Disc Filter RoDisc® and the HUBER Pile Cloth Media Filter RotaFilt® .[...]

[...]Access door for containers, especially in the field of potable water supply, pressure-tight up to a water gauge of 10 m Pressure-tight door , pressure-tight up to a water gauge of 10 m, opening to the pressure side, ready for installation, to be lined on both sides (wall thickness ≥ 300 mm), rectangular, completely made from 1.4404 (AISI 316 L) stainless steel, statically certified. Registered design no. 298 01 144.1 Door, plate thickness: 5 mm thick , reinforced with U-shaped bent plate. Smooth door leaf on the pressure side. With circumferential square silicone seal, suitable for potable water, ozone resistant, certified to KTW and DVGW W 270 standards. Locking crank handles operable both from the door outside and, for safety reasons, also from the pressure side while the reservoir is empty. With stable maintenance-free hinge plates between the door and frame. Frame , circumferential with one centre and two side gaskets, provided for embedding in concrete. Frame with lifting eyes. Frame and door shielded arc-welded and acid bath cleaned before washing, drying and surface passivation. Door opening variants: Hinges on left Hinges on right Options Sanding of frame parts in contact with concrete Condensate drain on external door surface Sampling valve on external door surface Doorstop with wedge Partly submersible, lower part pressure-tight, upper part with an integrated inspection opening Provided for welding to the PE coating Potential equalisation on the frame Completely made of 1.4307 (AISI 304 L) stainless steel Frame, for retrofitting, space required for the frame: 150 mm, circumferential. Prerequisite is a plane inner wall surface, tolerance: ± 1 mm per metre. Pressure door for round tanks Centrally installed inspection window, inside diameter: 150 mm, with or without window wiper Installed LED underwater spotlight Installed cylinder lock (operable from one side) Pressure door with three-sided open-top frame for parapets, maximum water gauge = door height.[...]

[...]Access door for containers, especially in the field of potable water supply, pressure-tight up to a water gauge of 30 m Pressure-tight door , pressure-tight up to a water gauge of 30 m, opening to the pressure side, ready for installation, to be lined on both sides (wall thickness ≥ 300 mm), rectangular, completely made from 1.4404 (AISI 316 L) stainless steel, statically certified. Door, curved convex design with frame reinforcements to ensure that the acting pressure forces can pass into the door frame via the circumferential frame. With circumferential special silicone seal, suitable for potable water, ozone resistant, certified to KTW and DVGW W 270 standards. Locking crank handles operable both from the door outside and, for safety reasons, also from the pressure side while the reservoir is empty. Frame, circumferential with one centre and two side gaskets, provided for embedding in concrete. Frame with lifting eyes. Frame and door shielded arc-welded and acid bath cleaned before washing, drying and surface passivation. Options Frame for retrofitting. Space requirements for the frame: 180 mm, circumferential frame on four sides. Prerequisite is a plane inner wall surface, tolerance: ± 1 mm per metre Sanding of frame parts in contact with concrete Vent holes in the frame Door opening options: Hinges on left or on right[...]

[...]Access door for containers, especially in the field of potable water supply, pressure-tight up to a water gauge of 10 m Pressure-tight door , pressure-tight up to a water gauge of 10 m, opening to the pressure side, ready for installation, to be lined on both sides (wall thickness ≥ 280 mm), rectangular, completely made from 1.4404 (AISI 316 L) stainless steel, statically certified. Door, 5 mm thick , reinforced with U-shaped bent plate. Smooth door leaf on the pressure side. With circumferential square silicone seal, suitable for potable water, ozone resistant, certified to KTW and DVGW W 270 standards. Locking levers operable both from the door outside and, for safety reasons, also from the pressure side while the reservoir is empty. With stable maintenance-free hinge plates between the door and frame. Frame , circumferential with one centre and two side gaskets, provided for embedding in concrete. Frame with lifting eyes. Frame and door shielded arc-welded and acid bath cleaned before washing, drying and surface passivation. Door opening variants: Hinges on left Hinges on right Options Frame, for retrofitting, space required for the frame: 150 mm, circumferential. Prerequisite is a plane inner wall surface, tolerance: ± 1 mm per metre Pressure door for round tanks Centrally installed inspection window, inside diameter: 150 mm, with or without window wiper Installed LED underwater spotlight Installed cylinder lock (operable from one side) Locking by means of screw caps Pressure door with three-sided open-top frame for parapets, maximum water gauge = door height. Sanding of frame parts in contact with concrete Condensate drain on external door surface Doorstop with wedge Sampling valve on external door surface Partly submersible, lower part pressure-tight, upper part with an integrated inspection opening Provided for welding to the PE coating Potential equalisation on the frame Completely made of 1.4307 (AISI 304 L) stainless steel[...]

[...]Using the thermal energy of process water to reduce operating costs Much of the industrial wastewater comes from the food production sector: slaughterhouses, breweries and beverage industry, distilleries and dairies. Wastewater from the chemical industry or mineral oil processing is also part of industrial wastewater. Independent of the specific industry sector, these different types of wastewater have one thing in common: the high energy content of the wastewater streams. Recovering thermal energy from process water The reuse of thermal energy already contained in the production cycle is becoming increasingly important these days. To this end, considerable amounts of thermal energy can be recovered, especially from industrial process water with high temperature levels, in order to raise fresh process water, for example, to the temperature level required for the actual production process. If this is not practical, then there is the possibility of feeding this energy to other processes or using it for other purposes (e.g. energy contracting). Cooling industrial wastewater Industrial wastewater can either be treated in a company’s own separate wastewater treatment plant (direct discharger) or, after possible partial treatment, be discharged to a public wastewater treatment plant (indirect discharger). Regardless of whether treated wastewater is discharged directly into a receiving water body or into the public sewer system, it must be ensured that the discharge temperatures are not too high and that the required limit values are complied with. Process Technology HUBER solutions for wastewater heat recovery and wastewater temperature reduction A particular challenge when using heat exchangers for industrial process water and/or wastewater is when the medium tends to form a film on the heat exchanger surfaces. The more build-up there is, the more the heat transfer capacity and efficiency is reduced. With the HUBER Heat Exchanger RoWin , HUBER has developed a self-cleaning heat exchanger that ensures permanently high and efficient energy transfer. For the removal of coarse contaminants and larger solids from wastewater or process water, HUBER offers a comprehensive range of screens and screening systems .[...]

[...]During dry weather, organic and inorganic sediments increasingly settle on the sewer base in combined sewer systems due to slow flow velocities. Under stormwater conditions, these sediments float up and arrive along with the sewer flow at the sewage treatment plant or stormwater overflow structure. If the combined sewer volume exceeds the capacity of the overflow structure or sewage treatment plant, the combined water is frequently discharged to a receiving water course, impairing water quality with the result of increased costs for maintenance and cleaning. As a preventive measure, coarse material retention systems are installed to retain unsightly coarse matter. DWA, the German Water, Wastewater and Waste Association, recommends in its Guideline A 166 the use of screening plants to retain coarse material. Scum boards are considered as unsuitable for this purpose. This position corresponds with the experience made in practice. Even though scum boards are able to retain the majority of the floating solids, the suspended matter can pass unhindered. In view of increasingly often occurring extreme weather conditions, even more consideration will have to be given to the use of screening plants in the future. Longer dry periods with storm events lead to load surges on coarse material retention systems with sudden huge amounts of screenings. In practice, it is quite possible that systems reach their capacity limits if faced with such high screenings loads. When planning a new plant, it is recommended to use especially systems that provide a defined take-up and removal of screenings directly at the sill and return of screenings to the continuation sewer through utilisation of the flow properties. Pushing the screenings back and forth only can very soon bring screening systems to their limits, with the result that part of the combined wastewater is discharged unscreened together with the screenings. In such cases, especially combined water screening systems for installation in front to the sill are well suited that transport the screenings in flow direction away from the machine. The screenings are transported along with the flow to the sewage treatment plant and do not get into contact with the combined water screening systems anymore. Moreover, no return of screenings is necessary, contrary to screening systems installed behind or on the sill. With its Storm Screen ROTAMAT ® RoK2, HUBER SE has offered a solution for such applications for more than 25 years already. In the RoK2 screens, the wastewater flows through the screen basket from bottom upwards. Screenings bigger than the screen surface perforations are retained on the screen basket and removed by a screw conveyor transporting the screenings to the discharge and dropping them at the end of the machine. While conveying the screenings, the screw cleans also the screen basket perforations so that the screen surface blinding produced is continuously low and maximum throughput rates are achieved all the time. The screen is equipped with a level control system and starts to operate automatically when the level control system measures a defined water level and stops again when the water level falls below the defined level again. This system keeps the run times of the screw as short as possible. In summary, it remains to be said that problems with screenings in combined water overflow structures will occur more and more in the next years. It is therefore important to develop a solution that is able to work reliably even with large screenings volumes.[...]

[...]Good ideas always find imitators The RakeMax® HF excellently combines the advantages of the well-proven RakeMax® with the positive properties of a screen with a bar rack that is installed with only a small inclination. The multi-rake bar screen RakeMax® for preliminary mechanical wastewater treatment was developed by HUBER in 2003 and presented to the public for the first time at IFAT 2005. Due to its versatility the RakeMax® has since very well proven its efficiency and become firmly established in the global wastewater technology market. More than 1,300 reference installations give proof of this success. On the basis of the successful RakeMax®, another new screen type for headworks has been developed in the course of continuous further development and for the first time presented at IFAT 2010, the L-shaped RakeMax HF® (high flow). Like the RakeMax® screen this L-shaped multi-rake bar screen belongs to the MAX family of HUBER screens. It were our competitors themselves who indirectly confirmed that we are on the right track with this innovation at IFAT 2014 where similar models could be "admired" on many booths. The RakeMax HF® screen consists of a flat and therefore hydraulically advantageous bottom section and a steep conveying section. This combines the benefits of the well proven RakeMax®, reliable solids separation and high screenings discharge capacity, with a low headloss due to a large effective screen rack surface. We have already sold more than fifty RakeMax® HF units. Due to the extremely small inclination of the bar rack, the screen section through which the flow passes is always double the flow profile in front of the rack. Another advantage of the large effective screen rack surface is that the flow velocity is very slow in the screen gaps with the result of a significant increase in separation efficiency. Furthermore, the flat installation angle of the bar rack and lifting of the material virtually at bottom level prevents problems with sediments in front of the screen, i.e. prevents right from the beginning that such material can settle at all. Main characteristics of the RakeMax® HF: High hydraulic throughput with a small bar spacing, even with deep channels Sturdy design, well-proven technology High removal efficiency Prevents disturbing sediments in front of the screen Especially with existing screening plants the minimum requirements on solids retention in the inlet are often not reliably met. One reason for this is certainly that people can select from a great variety of sanitary products today and have changed their consumer behaviour during the past years. To meet these changed requirements the passage opening at the bar rack needs to be reduced, but this frequently leads to growing hydraulic loads. These conditions make it inevitably necessary to provide for a bigger hydraulic passage area, and this normally means that the size of the existing channel has to be widened or even a new building erected for the screen, with the result of high construction costs. For such applications HUBER offers another screen type for headworks, the well-proven L-shaped multi-rake bar screen RakeMax® HF. RakeMax® HF screens can be adjusted to suit specific site requirements, both structural and hydraulic, and reduce investment and operating costs.[...]