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[...]Madrid-Butarque, Spain It is a successful large-scale project at the gates of the Spanish capital: HUBER successfully commissions 18 HUBER Multi-Rake Bar Screen RakeMax® units in the Madrid-Butarque stormwater retention basin. After ten years of less than satisfactory operation with products from other manufacturers, combined with high additional expenses, the City of Madrid renewed the facility in the south of the city with innovative and reliable products from HUBER. With a capacity of up to 400 million litres (400,000 m³), the stormwater retention basin is one of the largest of its kind in Europe. Maximum throughput of 63 m³/s: new screening plant with 18 HUBER Multi-Rake Bar Screen RakeMax® units The new screening plant for the protection of the Butarque stormwater retention basin consists of 18 HUBER Multi-Rake Bar Screen RakeMax® units size 5120 x 1775 with a bar spacing of 40 mm for a maximum water throughput of 63 m³/s. The screenings are discharged via a conveyor belt system. HUBER Technology España, the Spanish subsidiary of HUBER, developed a customised solution to ensure reliable and smooth operation under real conditions. After being contacted by the City of Madrid in 2019, HUBER convinced with its tailor-made solution – through detailed and specific knowledge of the wastewater situation in Spain and specifically in the Madrid metropolitan area, coupled with significant practical experience from ongoing projects. First project phase from December 2020 to April 2021: successful commissioning of the first nine HUBER RakeMax® As the inflow into the stormwater basin could not be interrupted and the continuous availability of the system had to be ensured, the project was carried out in two phases. In phase I, the necessary adaptation of the concrete works to the new equipment was carried out from December 2020 to February 2021. The installation of the first nine HUBER Multi-Rake Bar Screen RakeMax® units, including the electrical installation, was successfully carried out in March 2021 and the commissioning of the first project phase was completed at the beginning of April 2021. Outstanding performance of the HUBER machines: customer's expectations fully met Shortly after commissioning, the newly installed products had to master the first test: with the onset of spring rains, the first floods hit the stormwater retention basin, filling the screenings containers with several cubic metres of screenings within a few minutes. The performance of the new HUBER plant proved to be excellent and fully met the customer's expectations. Second project phase from July to November 2021: full upgrade and commissioning The second project phase was carried out between July and November 2021. By the end of 2021, the Butarque stormwater retention basin was fully upgraded and commissioned with the new HUBER RakeMax® screens. With this major project, HUBER has once again proven to be a very reliable partner for its customers. City of Madrid had invested 90 million euros for new stormwater retention basin As part of the infrastructure plan to improve the quality of the Manzanares, the approximately 90 km long river running through the Spanish capital, the city of Madrid had carried out the construction of one of the largest rainwater retention basins in Europe from 2005 to 2010. The city invested about 90 million euros in the construction. In total, more than 2.5 million m³ of earth was moved and over 90,000 m³ of concrete was used. Pollution and negative environmental impacts minimised, quality of river and ecosystem guaranteed Thanks to this measure, Madrid was equipped with a management and storage system (total capacity: 1.3 million m³) that prevents the direct discharge into the Manzanares of the large volumes of rainwater collected by the sewer network. This made it possible to stop the pollution of this water body, minimise negative environmental impacts and guarantee the quality of the river and its entire aquatic ecosystem. Installed products from other companies had to be replaced The originally proposed and installed solution for the inlet works comprised ten individual grab screens, and a flume channel had been built for the transport and removal of the screenings. However, already during the first storm event it became apparent that the installed equipment, screens and flume channels were not capable of handling the very large amounts of wastewater and screenings that entered the inlet structure of the stormwater basin. The inefficient and unsuitable cleaning system of these screens led to severe clogging of the bars, making it difficult to fill the rainwater basin. In addition, the operations staff had great difficulty in preventing the site from flooding and had to spend many hours manually cleaning the screens and the entire construction site after each rain event. After almost ten years of operation: HUBER delivers innovative and reliable products After almost ten years of operation under these inadequate conditions, which caused high effort and costs especially for operation and maintenance, the authorities planned to replace the mechanical equipment. In 2019, HUBER Technology España had been contacted and the current situation on site had been discussed by the responsible consultants, operators and owners. The successful implementation of such projects once again clearly showed how important it is to work with partners who not only have a great deal of experience, but above all detailed knowledge of the local conditions and processes. This is the only way to find tailor-made solutions that work in the end and meet the customers' expectations. And HUBER has impressively succeeded in this in the major Madrid-Butarque project.[...]

[...]Constance, Germany Lake Constance, with a water surface of about 536 km² the largest lake in Germany and the largest freshwater reservoir in Central Europe, has been used for the drinking water supply of the city of Constance for more than 110 years. Due to the already excellent quality of Lake Constance water, the waterworks can provide up to 50 million litres of drinking water for the Constance region every day with comparatively few treatment steps. Excellent drinking water quality through microfiltration, ozonation and sand filters The raw water is pumped out of Lake Constance from a depth of 40 metres. First, all coarse pollutants are removed by microfiltration and then any germs are killed by treatment with ozone. In the final step, the water flows through a sand filter that retains all remaining particles. Afterwards, the excellent drinking water can be distributed through the water network in the city and region. Use of reliable and innovative HUBER Disc Filter RoDisc ® technology A challenge in water treatment at Lake Constance are the approx. 50 µm small larvae of the Quagga mussel. The mussel, which originates from the Black Sea region, was first detected in Lake Constance in 2016 and has been spreading rapidly since then. In order to prevent a high cleaning effort in the downstream systems, it must be ensured that the mussel larvae do not impair the operation of the waterworks. To ensure this in the long term, the now 50-year-old drum filters are replaced by reliable and innovative HUBER Disc Filter RoDisc ® units. HUBER renews micro-screening system with three RoDisc® disc filters HUBER SE is responsible for the complete renewal of the micro-screening system. Together with the company Sülzle Kopf GmbH from Sulz am Neckar, the machines will be replaced step by step from the beginning of 2022 to mid-2023 to ensure that the drinking water supply remains continuously guaranteed. In the course of this, HUBER will supply three size 8 RoDisc ® disc filters. Equipped with a special filter fabric, the disc filters reliably remove particles > 20 µm and thus all mussel larvae. The HUBER Disc Filter RoDisc ® 8 consists of eight filter discs each, the wastewater flowing through the screen from inside to outside by gravity. If the permeability of the filter fabric decreases due to retained particles, the machine switches on automatically. Then the filter discs rotate and are cleaned by means of a high-pressure pump. As the filtrate from the machine itself can be used for cleaning, no additional fresh water connection to the machine is necessary.[...]

[...]Screw presses have been proving their worth for many years at wastewater treatment plants with population equivalents ≤ 100,000 mainly because the simple operating principle offers advantages compared to other continuously operating dewatering units such as decanter centrifuges: The use of the sludge feed pressure (0 – 300 mbar) as a control variable enables automatic adjustment of the machine and flocculant settings to fluctuations in the sludge consistency. Time-consuming readjustments by the operator are thus reduced to a minimum, and the dewatering system can typically be operated unattended overnight or over the weekend. With continuous operation of the sludge dewatering unit, the back-loading of the treatment plant by the filtrate water is evened out. Additional buffers to protect the biological stage from back-loading peaks can be omitted. he slow speed of the screw shaft (< 1 rpm) enables low-wear operation and thus reduces maintenance times and costs for spare parts. Dewatering degree and flocculant consumption determine operating costs However, the operating costs and thus the economic efficiency of sludge dewatering are largely determined by the degree of dewatering and the flocculant consumption. These parameters are typically determined in advance by on-site tests on a real scale or in the laboratory, evaluated in the tender process and thus used to award the contract. The increasing sales figures of the HUBER Screw Press Q-PRESS® prove its competitiveness here. Rising energy prices, energy self-sufficiency and security of supply Although the energy costs of sludge dewatering have so far played only a minor role in economic efficiency, a detailed consideration may make sense under the aspects of rising energy prices, security of supply or even energy self-sufficiency. Electricity consumption of sludge dewatering The electricity consumption of a sludge dewatering plant typically consists of the individual consumptions of feed pumps, conveying units, the flocculant preparation unit and the dewatering unit itself. While the peripheral plant components of a sludge dewatering system can typically be assumed to have a specific electricity consumption of approx. 15 kWh/tDR across all manufacturers, there are significant differences for the dewatering units. Power consumption of a HUBER Screw Press Q-PRESS® demo unit The diagram shows an exemplary evaluation of the power consumption of individual consumers of a demonstration unit of the HUBER Q-PRESS® at different wastewater treatment plants and under different load conditions. The specific power consumption of the peripheral plant components (without screw press) is approx. 15 kWh/tTR. Experience shows that this proportion is largely independent of the dewatering technology used. Only 30 per cent of the total electricity consumption of sludge dewatering The diagram shows that the screw press requires about 5 kWh/tDR and thus accounts for only 30% of the total electricity consumption of the sludge dewatering process. Differences in the specific energy requirements between the test locations are due to different solids loads and load conditions. Compared to decanter centrifuges: screw press saves around 80 per cent energy Using a modern decanter centrifuge results in a specific power consumption of about 40 kWh/tDR for the dewatering unit alone. The use of a screw press can therefore save approx. 80% energy compared to a decanter centrifuge. The following example calculation, based on a sludge quantity of 1,000 t dry matter (approx. 50,000 PE), illustrates the financial savings potential: Assuming an electricity price of 0.26 EUR/kWh, the annual electricity costs for the decanter centrifuge are 10,400 euros, for the screw press only 1,300 euros. A similar saving in operating costs of around 9,000 euros per year would result, for example, from: a permanent increase in the degree of dewatering by about 0.5 percentage points, assuming disposal costs of 100 EUR/tDR an average reduction in polymer demand of 3 kg/tDR at polymer costs of 3 EUR/kg The low energy consumption of a screw press can thus influence the economic comparison with decanter centrifuges and significantly reduce the electricity consumption for sludge dewatering.[...]

[...]Prepared for the future with HUBER Retrofit Service The ravages of time not only affect the machine technology, but also the associated switchboard and control system. As a result, failures and malfunctions occur more frequently, especially on the sensitive PLC (programmable logic controller) components. With outdated hardware, a standstill in the near future is unavoidable. Function and operational safety are no longer guaranteed. Moreover, the manufacturers of the PLC hardware are already focusing on new technologies (IoT, Industry 4.0, etc.). This means that spare parts procurement is no longer possible or is associated with high costs and long delivery times. HUBER Service has the perfect solution for you! With our HUBER Retrofit Service, you receive a new PLC hardware and a new operating device. This package is optimally tailored to your existing machine technology and your requirements. This replacement not only restores the long-term function and operational reliability again, it also leads to wear-optimised operation of your HUBER machines due to continuous further developments of the program sequence. We will be happy to plan a partial or complete renewal of the control system together with you, depending on your needs and requirements. The replacement can be carried out by yourself or by one of our experienced HUBER service technicians. HUBER uses standard programs that are tailored to your plant-specific requirements. This eliminates the need for expensive programming work on site. Nothing stands in the way of a quick restart. Replace - Switch on - Run! Of course, we can replace controls that were not originally included in our scope of delivery as well. The integration of third-party products is also no problem for HUBER. Our recommendation: Do not wait until the control system fails! Contact service@huber.de at an early stage. We will be happy to advise you without obligation on site or by phone to find the best solution for you. Kläranlage Fremdingen „steuert“ wieder sicher in die Zukunft - nur DE! Frank-Markus Merkt, Erster Bürgermeister der Gemeinde Fremdingen (Landkreis Donau-Ries, Schwaben), kommentiert die zukunftsweisende HUBER-Lösung für die Steuerungstechnik auf der Kläranlage der Gemeinde: "Der Grund für den Austausch der Schalt- und Steueranlage war, dass wir auf unserer Kläranlage immer fit für die Zukunft sein wollen und müssen, d. h. die Funktion und Betriebssicherheit der Anlage muss gegeben und heutzutage auf dem neuesten Stand der Technik sein! Die alte Schalt- und Steueranlage auf unserer Kläranlage war in die Jahre gekommen und dadurch nahm die Anzahl der Störungen und Ausfälle leider zu. Beim Ausfall einer Hardware an der alten Schalt- und Steueranlage, musste erst ein Spezialist kommen, der sich mit dieser veralteten Anlage auskannte, um den Fehler lokalisieren zu können. Wurde dann ein neues Bauteil benötigt, war dies oft mit langen Lieferzeiten und hohen Kosten verbunden. Teilweise mussten die Ersatzteile sogar auf Ebay ersteigert werden, weil diese gar nicht mehr im Handel erhältlich waren. Diese Ausfallzeiten, letztendlich hervorgerufen durch veraltete Technologie, führten dazu, dass die gesamte Anlage nicht mehr optimal betrieben werden konnte. Der Umbau der elektrischen Schalt- und Steueranlage auf technologisch aktuellen Stand durch den Service von HUBER lief reibungslos ab und die neue Schalt- und Steueranlage konnte innerhalb der von uns geplanten Zeit wieder in Betrieb gehen. Auch der Not-Betrieb während der Umbauphase lief sehr gut, die Anlage wurde vom HUBER Service auf Handbetrieb umgestellt und konnte während der Umbaumaßnahme so optimal betrieben werden. Die geforderten Ablaufwerte wurden somit gesichert eingehalten. Besonders gut war die Zusammenarbeit mit den beiden Klärwärtern Martin Fuchs und Alexander Lawatschka. Auf deren Wünsche und Vorschläge wurde eingegangen und die Anlage so vor Ort nach unseren Bedürfnissen optimal von den Spezialisten der Firma HUBER konfiguriert. Wir sind nach dem Umbau mit der neuen Schalt- und Steueranlage hoch zufrieden. Die neue Touch-Funktion am Display erleichtert die Bedienung sehr und unsere Mitarbeiter auf der Kläranlage konnten sich durch die kompetente Einweisung und Schulung durch den Service von HUBER sehr schnell einarbeiten und waren auch nach kurzer Zeit in der Lage, Betriebswerte bei Bedarf selbst anzupassen. Die Anlage kann dadurch optimal gesteuert und überwacht werden. Wir haben die Firma Huber als Partner für den Umbau der Schalt- und Steueranlage gewählt, da wir bisher mit dem Service von HUBER ausschließlich sehr gute Erfahrungen gemacht haben. Mit dem HUBER-Serviceberater, Herrn Erwin Wagner, haben wir neben dem HUBER Service-Center, einen hochkompetenten Ansprechpartner, der auch zu ungewöhnlichsten Geschäftszeiten immer erreichbar ist und uns bei Bedarf mit entsprechenden Maßnahmen hilft. Dieser notwendige Umbau unser Steuerungstechnik auf den neuesten Stand der Technik mit der Firma HUBER als Partner, bringt uns wieder Sicherheit für die Zukunft unseres Anlagenbetriebes! Die Zuverlässigkeit und Kompetenz von HUBER Service sucht ihresgleichen – wir fühlten uns von der ersten Minute an gut aufgehoben."[...]

[...]Birmingham, UK[...]

[...]Basel, Switzerland Wastewater as a heat source for heat pump systems represents a highly efficient energy source and energy sink. Its use is however often limited to big sewer diameters and high flow rates. This article presents an alternative to the use of heat from sewer wastewater: the use of the exhaust heat of locally generated wastewater as a regenerative and sustainable energy source for the production of service water and heating buildings, like in the example of the old-age home Hofmatt in Switzerland that is described below. Introduction Due to the ever improving quality of building shells the heat demand of modern buildings is decreasing continuously. Modern shells ensure to the greatest possible degree that the room air escapes or the room air is released to the open air via heat exchangers so that as little as possible of the energy gets lost. Such energy potential is hidden in our wastewater as well but usually runs off through the sewer system without being utilised. This is where wastewater heat utilisation comes into play. The aim is further use of the energy that is contained in wastewater. To achieve this, heat exchangers are required to separate the dirty wastewater flow from a clean cooling water flow. Such heat exchangers are available for installation into a sewer or for external above-ground installation. They are field-tested systems that have proven their efficiency. Most of the previously realised projects use the wastewater flow when it has already reached the sewer. In the old-age home Hofmatt in Switzerland we decided to take a new and very promising path: We use the in-house wastewater flow to recover energy to be used for heating purposes and to heat the service water. The use of wastewater at source carries a great potential. The daily pro capita production of wastewater is 130 l on average. The water has a temperature of 23-25 °C. When cooled by 15 K approximately 2.26 kWh energy can be recovered per day and pro capita. With a permissible annual energy demand of 55 kWh/m² as according to KfW85 and assuming 170 heating days this amount of energy is sufficient to heat approximately 7 m² living space at 100 percent duty. One of the major energy leaks of modern buildings can directly be closed this way (see figure2). Project History Located in the picturesque scenery near the "garden town" Münchenstein not far from Basel, the old-age home Hofmatt is a foundation of the family Zaeslin in memory of their two sons who died in a train accident in 1891. At that time Hofmatt was a recreation home for convalescents from the spital in Basel. From 1940 on the home was used as a protectory before, in the sixties, it became an old-age and nursing home. The first wing with about 60 beds was built from 1966 to 1968, the additional west wing was erected in 1977. The home was modernised for the first time in 1984 and another extension followed in 1995 which laid the basis for the nursery with 124 beds. In 2010, planning started to completely renovate and once again expand the building. It was at IFAT 2010 when HUBER SE for the first time presented a heat exchanger which is especially designed for wastewater applications. When the engineers of ETA Group learnt about it they presented their idea of small decentralized solutions for wastewater heat utilisation. It became clear very soon that the RoWin was the type of heat exchanger that would be ideal for the idea of wastewater heat utilisation for Hofmatt. The old-age and nursery home has been under renovation since 2012 and two new blocks will be added to the building. The modernisation of the building includes a completely new energy concept. The utilisation of the residual heat of the in-house wastewater and canteen play an important role in this concept. The complete wastewater generated in the complex is collected in a shaft in front of the house (see figure 1) and flows then through the HUBER RoWin Wastewater Heat Exchanger. In this process the thermal energy is extracted from the 23 °C warm wastewater flow and delivered to a heat pump. Comparison with alternative solutions At the beginning of the planning phase they thought about installing a manually cleaned heat exchanger. With a manually cleaned heat exchanger the wastewater passes through a filter unit when if enters the system to ensure the heat exchanger is protected against coarse material. Due to biofilm formation and lack of preventive surface cleaning the system must be cleaned manually which causes high maintenance costs. In addition, a quite large shaft is necessary to house the heat exchanger. The contractor EBM therefore decided together with the plant owners and operators to use a HUBER RoWin system which does its job without the need for maintenance due to fully automatic cleaning of the heat exchanger modules. Moreover, a turbulence generator ensures the heat transfer capacity is constantly high even with batch feeding. The installation of a fully automatic screen in the wastewater shaft ensures that the pump and heat exchanger are reliably protected against coarse material. Furthermore, a much smaller wastewater shaft was sufficient. Gas-tight and odour-tight manhole covers were installed in the shaft (see figure 3). It was therefore possible to place the shaft directly next to the building without annoying residents with emissions. A piston compressor heat pump with direct condensation is used on the heating side. The pump is able to heat the domestic hot water in the combi storage tanks to up to 70 °C. The district heating connection of EBM Münchenstein is available as 100% backup and to handle peak loads. The idea of the special district heating station with fully integrated plant parts came from HLK Consulting GmbH in Dornach. Their concept included service water warming combined with supplementary heating instead of mere service water warming. This solution was realised already 15 years ago in a number of installations in Basel where exhaust heat from cooling processes was used as a heat source. In this case the heat source is wastewater. ETA Group was responsible for the turnkey supply of the plant. Also the electrical controls for the complete plant came from the pens of ETA Group. The overall plant concept costed not more than the initially planned solution although it additionally provides increased use of the exhaust heat through supplementary heating. Mechanical equipment HUBER SE supplied the size 4S HUBER RoWin heat exchanger, the smallest available size, and the ROTAMAT® RoK 1 Storm Screen. The heat exchanger was installed in the basement of the building next to the heat pump (see figure 4). ETA Group supplied a heat pump with piston compressor and direct condensation which is able to heat the domestic water to up to 70 °C. ETA Group installed Jenni storage tanks which are suitable to be operated with direct condensation. As no other heat exchanger is used system efficiency can be improved and also the achievable temperature rises. Inside the stratified storage tank warm service water is hold available with a temperature of 65 °C in the upper section, with 30-40 °C for heating the building in the middle and with 25 °C in the bottom section for additional cooling of the liquefied cooling agent. The speed-controlled compressor increases the efficiency in partial-load mode. Operational experience Plant start-up took place in 2012. Both ETA Group and EBM Münchenstein have given a positive review on the two years operational experience. Since the teething problems were solved the system has produced 65 °C hot service water and ensured the supply to a large part of the heating with an energy efficiency ratio of 3.2. Maintenance has not been necessary up to now, neither for the heat exchanger nor for the collection shaft. This project has been ideal for the parties involved to gather experience on a small scale how to operate such plants. They are now well prepared to integrate them when planning bigger projects. Conclusion In modern buildings a large part of the heat energy is required to produce hot water which is then discharged to the sewer system and sewage treatment plant without making use of the energy potential contained. This energetic gap can now be closed with the use of wastewater heat. The released energy can be recovered. This reduces the primary energy demand and CO 2 emissions. Wastewater heat utilisation can thus contribute a lot to the overall energetic optimisation of buildings. Wastewater heat utilisation is also acknowledged as a regenerative alternative measure according to the German Renewable Energy Heat Act (EEWärmeG). Future projects should however not only focus on heat recovery from wastewater alone, also the possibility of cooling with wastewater should be considered. Through simple heat pump circuit reversal the same system that is used to heat the building in winter can be used for cooling in summer. This results in a significant reduction of the period of amortisation without the need to install additional equipment for cooling. Due to its more than 130 years company history HUBER is a reliable partner when it comes to project planning and is able to satisfy customers with its technical high-quality products. Thanks to the company's global sales network the technical solutions that are required for wastewater heat utilisation can be made available to customers on all continents of the world. The easily available resource wastewater, short decision making processes and having both energy source and energy sink under literally one roof are good reasons in favour of such a type of plant. Under appropriate frame conditions it is certainly recommendable to repeat the concept. In modern buildings a large part of the heat energy is required to produce hot water which is then discharged to the sewer system and sewage treatment plant without making use of the energy potential contained. This energetic gap can now be closed with the use of wastewater heat. The released energy can be recovered. This reduces the primary energy demand and CO 2 emissions. Wastewater heat utilisation can thus contribute a lot to the overall energetic optimisation of buildings. Wastewater heat utilisation is also acknowledged as a regenerative alternative measure according to the German Renewable Energy Heat Act (EEWärmeG). Future projects should however not only focus on heat recovery from wastewater alone, also the possibility of cooling with wastewater should be considered. Through simple heat pump circuit reversal the same system that is used to heat the building in winter can be used for cooling in summer. This results in a significant reduction of the period of amortisation without the need to install additional equipment for cooling. Due to its more than 130 years company history HUBER is a reliable partner when it comes to project planning and is able to satisfy customers with its technical high-quality products. Thanks to the company's global sales network the technical solutions that are required for wastewater heat utilisation can be made available to customers on all continents of the world. The easily available resource wastewater, short decision making processes and having both energy source and energy sink under literally one roof are good reasons in favour of such a type of plant. Under appropriate frame conditions it is certainly recommendable to repeat the concept.[...]

[...]Birmingham, Great Britain[...]

[...]Oslo, Norway[...]

[...]Venting chimney / ventilation stack DN 150 154 mm outside dia.), with insect-proof stainless steel screen, mesh 1x1 mm, free sectional area 37%, with attached hood. Completely made of 1.4307 (AISI 304 L) stainless steel and shielded arc welded, acid-treated in a pickling bath and passivated. Vapour hood for optimal shaft ventilation A insect filter offers protection against small animals Stainless steel, acid-treated in a pickling bath - offers long life and hygiene Short-term availability from stock in various lengths Options Options for vertical installation: Adjustable wall flange Welded-on wall flange Welded-on dowel flange Rubber seal and fixing material for the dowel flange Pipe saddle DN 150, wall distance to pipe axis: 227 mm ± 30 mm Plastic connection possible (only for manhole interior) Options for lateral installation: Guard grille for dowelling to the inner tank wall, mesh 10 x 10 mm, free cross section, 55% Rubber seal and fixing material for the dowel flange Pipe saddle DN 150, wall distance to pipe axis: 227 mm ± 30 mm Options for both installation variants: Replaceable pollen filter Tubular biofilter within the ventilating chimney for odour elimination 1.4404 (AISI 316 L) stainless steel Other pipe diameters[...]