Search

[...]Water purification and residue treatment for paper and pulp production and wood processing Saving disposal costs Minimising residues Treating process water Screening out fines and fibres Cooling wastewater Recovering heat Treating process and river water The paper, pulp and wood industries traditionally use large quantities of water, which in turn generates large quantities of wastewater. These must be treated accordingly for discharge. In order to further reduce fresh water requirements and costs, water recycling is also being pursued. In addition, the minimisation of residual materials such as process sludge also plays a major role. Ideally, residual materials can be recycled directly on site, e.g. after drying. As one of the world's leading suppliers, we offer proven machines and systems to also solve your challenges in wastewater purification, water treatment or the volume minimisation of residual materials up to their recycling - at low costs and short payback times. HUBER products and solutions for your requirements For cooling or process water, river water or surface water is often used, which first has to be pretreated. For such requirements we use our HUBER screens and screening plants for water intake applications. Grit and gravel can be reliably separated using HUBER Grit Traps or HUBER Complete Plants . Our HUBER Drum Screens are ideally suited for fine screening up to 0.2 mm and offer superior separation performance as well as high hydraulic throughput. Residual materials (e.g. separated process sludges or excess sludge from biological wastewater treatment) are treated with HUBER thickening or dewatering machines, thus saving transport and disposal costs. With HUBER Belt Dryer BT , dewatered biosolids can be dried to a dry residue of more than 90% DR and thus be reused as fuel. Existing heat sources are used for this purpose. For the removal of fines or paper fibres, as well as for the reduction of particulate and colloidal COD (or as pre-treatment or secondary clarification), HUBER Dissolved Air Flotation Plants are used. This allows the process water to be further treated or the resulting clear effluent to be discharged into the sewer. The specially developed self-cleaning HUBER Heat Exchanger RoWin cools wastewater and effluent before it enters biological treatment or is discharged. Recovered heat can be reused. We are your competent partner, from the treatment of raw water to process water and water recycling to the disposal and recycling of screenings, process sludge and biosolids. Our solutions for your challenges: Water intake COD, fat and solids reduction Reliably comply with discharge limits Reduce operating costs for wastewater treatment Reduce disposal costs for waste and sludge Recover wastewater heat and reduce wastewater temperature Access solutions for manholes and tank[...]

[...]Sleaford, UK Anglian Water approached HUBER in January 2006 and asked us to offer a solution for resolving problems at their Sleaford plant where large amounts of screenings passing through the inlet works and impairing downstream processes. The operators were also experiencing problems with their existing screenings processing system. In co-operation with a local contractor we proposed to remove the existing screen and screenings processing system. We offered a pair of HUBER Belt Screen EscaMax® 4000 perforated band screens with a width of 752 mm and a capacity of 101 l/s, installed at an angle of 60° within the channel, a WAP/SL size 2, and control panels. The local contractor would carry out the removal of the failing equipment, supply of a launder channel and complete mechanical and electrical installation. Our proposal was accepted by Anglian Water and an order was placed in April 2006. The plant was commissioned in November 2006 and operator training was carried out in January 2007. The operators are delighted with the new equipment and we are using this site as an excellent reference for the HUBER EscaMax®.[...]

[...]Sustainable Use of our Waters Municipal wastewater contains between 5 and 15 mg/l phosphorus. If phosphorus is not adequately removed during wastewater treatment, it ends up in the receiving waters. In lakes and rivers, phosphorus acts as a nutrient that generally promotes and accelerates plant growth, especially algae growth, which has a negative impact on water quality and thus on the biotic communities in the water body. Reducing phosphorus inputs from municipal wastewater treatment plants is therefore a very important contribution to maintaining or achieving a good ecological status in flowing waters. Three different processes are available for the elimination or reduction of phosphorus at municipal wastewater treatment plants, which are used either individually or in combination: Biological phosphorus elimination Chemical-physical processes Flocculation filtration Flocculation Flocculation Filtration HUBER offers reliable and proven process technology for flocculation filtration, which ensures that the relevant phosphorus limits can be safely met. Flocculation filtration with sand filter The sand filter used is the HUBER Sandfilter CONTIFLOW® , which is a deep-bed type upflow filter that provides filter bed cleaning without interrupting the filtration process. The precipitant (e.g. FeCl 3 solution) is added into the feed line to the filter. Due to the fast reaction time of the precipitant with the ortho-phosphate, the filter bed of the sand filter can be used directly as reaction volume. The precipitated ortho-phosphate is then separated together with other solids in the sand filter and phosphorus concentrations of < 0.2 mg/l can be maintained in the outlet of the sand filter. Flocculation filtration with cloth filter The HUBER Pile Cloth Media Filter RotaFilt® , which consists of several rotatably arranged disc-shaped filter elements, is used as cloth filter. The wastewater with the added precipitant is passed through the filter system and the precipitated phosphate compounds, together with other solid particles still present, are reliably separated by the filter discs. Phosphorus concentrations of < 0.2 mg/l can be maintained in the outlet of the cloth filter. Three Ways to Filter Phosphor Biological phosphorus elimination The Bio-P process, i.e. the increased biological phosphorus elimination, is based on a special process management in biological wastewater treatment. Through the targeted alternation between anaerobic and aerobic conditions, an increased uptake of phosphorus by certain bacteria is achieved. Chemical-physical processes Here, a precipitant (iron or aluminium salts) is added to the wastewater, which precipitates the phosphorus so that it can be separated with the sewage sludge. Flocculation filtration In addition to the aforementioned phosphorus elimination processes, a filter unit is installed in the outlet of the secondary clarifier. With the addition of precipitation and flocculation aids, very extensive phosphorus elimination can be achieved.[...]

[...]Rhiwsaeson, UK Achieving Reliable Ultra‑Low Phosphorus Compliance using the HUBER Pile Cloth Media Filter RotaFilt® Client: Dŵr Cymru Welsh Water, Site: Rhiwsaeson Wastewater Treatment Works (Trickling Filter site, 51 l/s FFT) The Challenge With increasingly stringent Total Phosphorus (P T ₒₜₐₗ) consent limits on the horizon, Rhiwsaeson WwTW required a robust, future‑proof tertiary treatment solution capable of consistently achieving 0.1 mg/l P T ₒₜₐₗ The solution also needed to perform reliably under: Variable flows and seasonal temperatures, Wet and dry weather conditions, Periods of upstream biological stress and planned maintenance, and Existing chemical dosing arrangements. The Solution A HUBER RotaFilt® TSR pile cloth filter, supplied as a free‑standing demonstration unit, was installed alongside a compact tertiary coagulant dosing system housed in a small ancillaries container. The RotaFilt® system was trialled from November 2024 to July 2025, allowing performance to be assessed across a full range of operating conditions. Performance Results The trial clearly demonstrated that the RotaFilt® system: Consistently achieved ≤0.1 mg/l Total Phosphorus, Maintained effluent quality without adverse impacts on other parameters, Operated reliably across seasonal temperature changes, and Performed effectively even during upstream process challenges. Importantly, the system showed strong resilience, continuing to meet phosphorus targets when the biological treatment process was not operating optimally. Operational Insights & Process Benefits The trial delivered valuable operational data and optimisation opportunities: Insensitivity to Dosing Set-up The degree of mixing after dosing and flocc retention time were not critical to ensure effective phosphorus removal performance. When the upstream biology was underperforming, however, ≥ 5.5 outgoing pH was realised by maintaining: ≥0.5 m/s velocity through the static mixer, and ≥90 seconds flocc retention time. Smarter Chemical Control A clear relationship was identified between the incoming turbidity and P T ₒₜₐₗ concentration. This enables more accurate, demand‑based coagulant dosing, rather than relying solely on flow‑proportional control. Low Maintenance, High Resilience A deliberately induced partial clogging event demonstrated: Rapid recovery, No need for chemical cleaning, and No removal of filter discs was required. Furthermore, over 9 months of continuous operation: No deep cleaning of the pile cloth media was necessary, and The natural humus build‑up during warmer months was easily managed using a simple, operator‑friendly method. These confirmed the RotaFilt® system’s low maintenance burden and high operational robustness. Operational Cost Savings A key outcome of the trial was the discovery that: Target phosphorus levels were achieved without increasing tertiary coagulant usage when the primary ferric dosing stage was inactive. This finding highlights the significant potential for chemical OPEX savings, particularly for sites reviewing or rationalising existing dosing strategies. Conclusion The RotaFilt® system proved to be a reliable, efficient, and low‑maintenance solution for ultra‑low phosphorus removal at Rhiwsaeson WwTW. The HUBER RotaFilt® offers: Confidence in meeting tightening discharge consents, Reduced operational risk, Optimised chemical usage, and A compact and easily deployable tertiary treatment solution. The HUBER RotaFilt® is a proven choice for wastewater treatment works seeking dependable phosphorus compliance with long‑term cost benefits.[...]

[...]Berching, Germany Simple and low-cost method of phosphorus removal from wastewater The nutrients we discharge into water courses (phosphorus, nitrogen) severely impairs water quality in the long run. Even phosphate contents in the lower microgram range can already have a negative effect on the oxygen content in waters and thus increase their eutrophication potential. Eutrophication is referred to as the enrichment of a water body by plant nutrients (overfertilation). These nutrients lead to increased algae growth, and algae make the water turbid. After some time, only the surface-near layer still has sufficient light for photosynthesis. As a result of reduced photosynthesis the oxygen concentration in the water decreases. In addition, degradation of dead algae by microorganisms takes place, a process that consumes oxygen. So, eutrophication results in a very low oxygen concentration in the water which can finally lead to (anaerobic) decomposition processes and fish death, i.e. "dying of the water body". The plague of algae even threatens drinking water supply in some countries, such as China or Russia. In June last summer, for example, the algae in the Lake Taihu in China had grown so much that the drinking water supply to the connected population in the city Wuxi in the Jiangsu province had to be interrupted and five million people were dependent on bottled water. As nitrogen, sulphur, etc. are usually present in waters in greater amounts due to human influences, phosphorus content is considered to be the limiting factor for excessive algae growth. Removal of phosphorus therefore plays a key role for the protection of our waters as any additional discharge further increases the growth of plants. In terms of wastewater treatment phosphorus is removed from wastewater in the solid aggregation state along with the sludge. Phosphorus is converted into solids and integrated into the sludge either through being absorbed into the biomass or through additional chemical precipitation. As the biological integration of the phosphorus (bio-P-process) is limited, most sewage treatment plants use a combination of biological and chemical phosphorus reduction. During the process of chemical phosphorus elimination multivalent metal ions form insoluble compounds with the phosphate ions that are present in the wastewater as dissolved ions. Especially as the phosphorus is converted into an undissolved form in these partly complex process steps, the reliable separation of solids plays an important role. The HUBER RoDisc® screen is a cost-effective and reliable filtration solution for this purpose, it ensures extensive solids removal from the effluent from the secondary clarification tank. Due to its small space requirements, low pressure loss, modular design and feeding by gravity the RoDisc® screen can easily be tailored to suit any specific site requirements and keeps the structural alteration work required to a minimum. The major part of the residual contaminants in the sewage treatment plant effluent are dissolved substances, another part are suspended sludge flocks. Each milligram of suspended activated sludge that runs off along with the treated wastewater increases phosphorus effluent values by approximately 0.02 to more than 0.04 mg/l (ATV-DVWK-A131). This means for example that phosphorus concentration can already be reduced by approximately 0.4 to 0.8 mg/l with the use of a downstream disc filter screen that removes 20 mg/l of filterable solids. Phosphorus removal efficiency can be further improved by adding more precipitants in the upstream process steps (simultaneous precipitation). The use of precipitants leads to an increase in the amount of inorganic substances that are bound to the sludge flock through agglomeration, these are also removed from the wastewater through filtration. Normally, phosphorus effluent values below 1 mg/l can reliably be met with filtration and addition of a sufficient amount of precipitants in the upstream treatment stages, even effluent values below 0.5 mg/l phosphorus can be achieved. Where especially extensive phosphorus elimination is required the RoDisc® screen can be used as flocculation filtration system. In this case, simultaneous precipitation and biological phosphorus elimination should be used in the upstream wastewater treatment stage to ensure that the phosphorus concentration in the secondary clarification tank is relatively low already and the disc filter screen can be operated economically. The precipitant is dosed into the effluent from the secondary clarification tank. After a short flow distance (reaction distance) it is passed into the disc filter screen. The screen is equipped with needle felt as filter material to ensure that the very fine flocks produced with the use of precipitants are removed. Due to the three-dimensional design of the needle felt filter the separation effects are virtually the same as those of a conventional deep-bed filter, and these are the effects which are necessary to reliably remove the micro flocks. Retrofitting of this additional treatment stage makes it possible to achieve monitoring values below 0.3 mg/l phosphorus. A disc filter screen is a simple yet efficient solution which can be used to meet various specific requirements of phosphorus reduction and is therefore a decisive contribution to the protection of our waters. The minimal pressure loss combined with small space requirements permit the problem-free integration of downstream filtration stages in existing wastewater treatment plants.[...]

[...]The first HUBER service consultant tour in New Zealand, organised and planned by our long-time service consultant Martin Burger, marked a significant milestone for HUBER. With a time difference of 12 hours and a flight time of approx. 22 hours, he was faced with great challenges, which he successfully mastered together with colleagues from our partner company Hydroflux at the end of 2024. In his report, Martin Burger talks about an unforgettable journey: ‘New Zealand, known for its active volcanoes and impressive landscapes, provided the setting for a tour full of technical highlights and enriching encounters. The first service consultant tour to Australia had already taken place in 2022, organised in collaboration with Hydroflux. This proved so successful that it has now been extended to New Zealand. The next tour in this region is planned for 2026. The tour was excellently organised by Hydroflux and included customer visits to the North Island of New Zealand. The aim was to provide customers with professional service advice on site and at the same time deepen the knowledge of our local partners. I was accompanied on the tour by three colleagues from the Hydroflux team: Stewart Harris, Jamsheed Tata and Joshua Eickhoff. Tour details Day 1 and 2: Taupo region After arriving in Taupo, we visited the Taumarunui and Whakapapa sewage treatment plants, the latter at the foot of the Ruapehu volcano. This volcano, which was last active in 2007, was the setting for the film ‘The Lord of the Rings – The Return of the King’. Further stops were the sewage treatment plants in Ohakune and Motuoapa. Day 3 and 4: Kerikeri region The second stage took us north of Auckland to the Kerikeri region. We visited the Kaihoe, Rawene, Whatuwhiwhi and Kaitaia sewage treatment plants. A special moment of the tour was the meeting with Michael Jackson from the Ventia wastewater treatment plant. The customer's enthusiasm about the direct support from a German HUBER service consultant was overwhelming. A cultural highlight was the visit to the ‘Hundertwasser toilet’ in Kawakawa. Designed by the Austrian artist and architect Friedensreich Hundertwasser, it was opened in 1999 and is now one of the most famous public toilets in the world. Day 5: Hydroflux office, Auckland On the fifth and final day of the tour we met at the Hydroflux office. Here I shared our experiences with 15 colleagues from Australia and New Zealand and organised another digital training session on the HUBER machines. To summarise, I can say that the service consultant tour in New Zealand was a complete success. In addition to providing technical support and customer advice, we were able to expand our partners' knowledge and deepen our collaboration. Working closely with Hydroflux once again demonstrated the importance of strong partnerships. The positive feedback from customers confirms that HUBER Global Service and especially our service consultants are on the right track with their commitment to strengthening and expanding customer relationships in the long term. We are already looking forward to the next tour in 2026!’[...]

[...]Hannover-Lahe, Germany The Hannover-Lahe project of HUBER and sludge2energy GmbH is progressing further: The two HUBER Disc Dryer RotaDry® 2050 M units are just before their hot commissioning. Using a heavy-duty crane, the two disc dryers, each weighing around 63 tonnes, were unloaded from the heavy-duty transporters on site in November 2021 and lifted directly into the building onto the prepared level. They will be used in the Hannover-Lahe sewage sludge mono-incineration plant (KVA) as pre-dryers for processing the sewage sludge into fuel. Shortly afterwards, the fluidised bed furnace and turbine were also lifted into place and the missing steel structure was completed. Thermal drying for further utilisation of the sewage sludge: environmentally friendly heat for around 5,000 households The HUBER Disc Dryer RotaDry® units dry the dewatered sewage sludge to such an extent that it can be utilised autothermally (i.e. without external heat or energy input) as fuel in the fluidized bed incinerator. The steam generated in the boiler is used both to produce electricity to cover the plant's own electrical needs and to heat the dryers. The vapours produced (steam) are condensed in a vapour condenser, the resulting heat is used to feed the district heating network. The environmentally friendly heat is then available to around 5,000 households. Successful cold commissioning in 2022 A successful milestone in the project: In November 2022, the cold commissioning with signal check and direction of rotation tests took place. During the cold commissioning, the two rotors, which weigh several tonnes, were also set in motion gently for the first time. After completion of cold commissioning, a comprehensive training of the operating personnel by the responsible HUBER process engineer took place. Outlook: hot commissioning and start-up The service team will soon start the hot commissioning and start-up of the two HUBER Disc Dryer RotaDry® units. The dryers will then be exposed to steam for the first time and heated up in a controlled manner. Following the successful hot commissioning, sewage sludge can be dried and conveyed to the fluidized bed incinerator for the first time.[...]

[...]Another milestone in the Hannover-Lahe project of sludge2energy GmbH The two HUBER Disc Dryer RotaDry® units 2050 M were successfully lifted into place in calendar week 44. A crane unloaded the two disc dryers from the heavy load transporters on site and lifted them directly into the building onto the prepared level. The disc dryers, each weighing around 63 tonnes, are used in the Hannover-Lahe sewage sludge mono-incineration plant (KVA) as pre-dryers for fuel preparation. Thermal drying for further utilisation of the sewage sludge: environmentally friendly heat for around 5,000 households Thermal drying ensures that the dewatered sewage sludge is dried to such an extent that it can be utilised autothermally (i.e. without external heat or energy input) in the fluidized bed incinerator. The steam generated in the boiler is used both to produce electricity to cover the plant's own electrical needs and to heat the dryers. The vapours produced (steam) are condensed in a vapour condenser, the resulting heat is used to feed the district heating network. The environmentally friendly heat is then available to around 5,000 households. Video: Erfolgreicher Einhub der HUBER Scheibentrockner RotaDry® The huge dryers on their way to site on flatbed trailers The first dryer is lifted directly into the building onto the prepared level Next please After the dryers have been lifted into place, the steel construction above the dryers can now continue Video: HUBER Disc Dryers successfully lifted into place The two HUBER Disc Dryer RotaDry® units 2050 M were successfully lifted into place in calendar week 44 / 2021. After dryer insertion: steel construction, mechanical assembly and commissioning in 2022 After the dryers have been lifted into place, the steel construction above the dryers can now continue, and the roof of the building will be closed at the beginning of next year. Subsequently, mechanical assembly will start by the third quarter of 2022, followed by commissioning of the entire plant. HUBER, in cooperation with its subsidiary and the general contractor of the overall project, sludge2energy GmbH, is thus building a modern and efficient plant for sewage sludge recycling that meets the highest standards. Another heavy load lifting manoeuvre: fluidized bed furnace S2E-Fluidizer, followed by insertion of the steam turbine Lifting in of another heavy load component followed directly in calendar week 46: The S2E-Fluidizer, the fluidized bed furnace developed by S2E and the heart of the combustion concept, was already completed on site and lifted into place at the plant. In calendar week 47, installation of the steam turbine will take place.[...]

[...]Plants for Thermal Sludge Treatment Sewage Sludge Drying and Mono-Incineration Sludge Turner for Solar Drying Cold Air Dryer Belt Dryer Disc Dryer The existing and future challenge in sewage sludge treatment is to process the dewatered sewage sludge with further process steps to such an extent that safe disposal or even economic use is possible. With our machines and plants, we provide customised solutions. Reducing the water content of the sewage sludge by drying reduces the resulting disposal costs considerably. Sludge Drying is energy intensive. The energy demand of available drying systems varies, as well as their operation and end product quality. The most suitable system is selected for each individual sewage treatment plant. HUBER can select the right drying solution for any application and specific conditions.[...]

[...]Enabling water cycles, removing disturbing solids, compacting residual materials Reduce disposal costs Increase economic efficiency Separate disturbing solids and coarse material Remove grit and mineral material Separate organic matter Dewater residues Save process water The recycling of plastics from households, industry and agriculture is becoming increasingly important for ecological and economic reasons. A large number of new plants for the wet-mechanical processing of plastics are being built all over the world. The resulting wastewater must be treated and reused in the best possible way. The quantities of wastewater and residual materials to be disposed of should be reduced to a minimum. HUBER offers efficient and proven solutions for the treatment of such types of wastewater and sludge and also has the long-standing know-how in design and dimensioning of the machines and plants. HUBER products and solutions for your requirements Depending on flow rate, pollution load and required separation, HUBER ROTAMAT® screens or HUBER Drum Screen RoMesh® units are used for pre-screening the wastewater. The pre-screened wastewater is fed into a HUBER Dissolved Air Flotation Plant HDF . This chemical-physical treatment produces water that is almost free of mineral and organic solids. The treated water can be reused in the treatment process. Before disposal, the sludge is mechanically dewatered by HUBER Screw Press Q-PRESS® units to achieve maximum volume reduction. The numerous projects we have successfully completed in the plastics recycling industry, combined with our many years of experience in wastewater and sludge treatment, guarantee the reliable and efficient operation of your plant technology. On the basis of our standard components, we are able to create the appropriate concept for every application and supply you with optimal and reliable technology. Our solutions for your challenges: COD, fat and solids reduction Reliably comply with discharge limits Reduce operating costs for wastewater treatment Reduce disposal costs for waste and sludge Water reuse Access solutions for manholes and tanks[...]