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[...]All-round building protection with tested security We must eliminate the risk of any manipulation of our drinking water and its quality. Access to the free water surface must be prevented and the plants protected against vandalism and theft. The exterior shell of objects should therefore be designed as a mechanical barrier with a long resistance time. Criminal investigation departments recommend, among other measures, the use of security doors certified to resistance class RC3 or RC4 in compliance with DIN EN 1627. For vertical access, it is best to use tested security manholes covers . Certified according to DIN EN 1627 Only certified products are able to meet the high requirements. All openings and entrances should be of the same security class. HUBER security products meet the high requirements of DIN EN 1627, resistance class RC3 or RC4. Beside careful manufacture and matured product design the material stainless steel ensures high mechanical strength. Due to its robustness, stainless steel offers maximum mechanical security against boring, sawing and grinding tools. The extensive HUBER product range offers: Attack-proof manhole covers Security doors Security louvres[...]

[...]Stay on the safe side! The need for security has strongly increased especially in the recent past. This development can be recognized in nearly all situations of life. The security requirements are however especially high where a great many people could be affected very easily. Drinking water supply is an example for such a case. The facilities in this sensitive environment are often in a very poor condition. To identify potential weak points, the authorities recently simulated burglary attempts on public institutions, among them also drinking water supply structures. This campaign lead to a significant increase in inquiries we received for attack-proof products for improved security. There are, however, a variety of other structures in sensitive areas that have inspection openings and entrances and therefore need also special protection against unauthorised access. The specifications of DIN EN 1627 define resistance classes, resistance times (the period for which a product can withstand a burglary attempt), type of criminal, and the so-called ‘modus operandi’, i.e. how the offender proceeds. According to DIN EN 1627, six different resistance classes are defined for burglar resistance, with RC 6 as the highest class (RC = resistance class). Which resistance class is required for which application depends on the individual hazard situation (risk), e.g. where the object is located and how easily the hazard area can be observed and overlooked. The advisory bodies of the State Offices of Criminal Investigation recommend for example resistance class RC3 for entrance doors to water supply installations with burglar alarm system. If there is no burglar alarm system, it is recommended to use security doors that offer resistance class RC4. Security doors certified to resistance class RC3 and RC4 have been in the product portfolio of HUBER SE for several decades already. To increase also the safety factor of manhole covers, our program includes now manholes covers certified to resistance class RC3 according to DIN EN 1627. The term “burglar-resistant” thus is clearly defined also for manhole covers and represents comparable values according to the latest security definitions. Some details were optimised as a result of the security test. The lock for example is now a lock system with anti-drilling protection. Also manhole covers can be equipped with a magnetic contact as OPEN/SHUT indicator. We have many years of experience in the manufacture of manhole covers of all kind and have therefore placed the focus on maximum resistance to unauthorized entry into the shaft when developing and manufacturing burglar-resistant manhole covers. Let us find the weak points of your plant before others do – contact us! In addition to reliable protection against burglary, also the factors economic efficiency, operational reliability, easy operation and compatibility with existing plants are important quality characteristics. The quality “stainless steel” itself implies a high level of resistance. The perfect resistance of stainless steel products is however only given if the material is properly processed and finished. We have been manufacturing almost exclusively from the material stainless steel for more than 45 years and are therefore a stainless steel supplier by conviction! The result of these many years of focusing on stainless steel is a production that is completely tailored to processing this material and includes an integrated pickling bath to form a passive layer. This passive layer is the requirement for the corrosion resistance of stainless steel over many years. Act now! Especially remotely located well shafts are under constant threat of unauthorized manipulation. Beside careful manufacture and matured product design, the material stainless steel ensures high mechanical strength. Stable equipment will more likely deter burglary attempts and resist long enough![...]

[...]Our demonstration plants with the HUBER Drum Screen LIQUID for the reduction of the pollution load in the inlet to wastewater treatment plants are in great demand and fully booked until 2020. Even in the local press, our machine technology receives attention again and again. On average, the location of a trial plant changes every 8 weeks. To ensure that everything runs smoothly, a well-coordinated, proven HUBER team takes over the organisation and integrates the responsible persons on site. Two applications are in special demand by our customers: Bridging operation during the rehabilitation of existing primary treatment and/or aeration tanks Not only the machine technology on a sewage treatment plant is subject to wear and requires regular maintenance and overhaul. The same applies, only at longer intervals, to concrete structures such as primary clarifiers or aeration tanks. Such a rehabilitation requires well-thought-out planning, as the cleaning performance of the plant must not be impaired even when individual tanks are shut down. The mobile plant with the HUBER Drum Screen LIQUID can play an important role here by removing particulate carbon from the untreated wastewater. Thus, such a tank rehabilitation can be carried out during operation of the wastewater treatment plant and still ensure the purification performance of the wastewater treatment plant is maintained. Trial operation for technical primary clarification during a sewage treatment plant conversion In the course of planning for the conversion and/or expansion of a sewage treatment plant, many points need to be clarified. Frequent questions are among others: What measures need to be taken to increase the capacity of the sewage treatment plant in a space-saving and cost-efficient way? Is it worthwhile to change from aerobic sludge stabilisation to anaerobic digestion with digester and energetic utilisation of the sewage gas? What effect does mechanical pre-clarification have on cleaning performance and the aeration energy necessary for the biological treatment stage? What are the advantages of using a drum screen? Regardless of the task at hand, the mobile HUBER Drum Screen LIQUID unit is prepared for it. The test plant can be fed with raw wastewater either by pumps or by gravity. Solids separated during operation of the HUBER Drum Screen LIQUID accumulate as thin sludge, which must be further thickened and disposed of. If the wastewater treatment plant already has a digester, the thin sludge can be fed to the existing sludge treatment system. However, if the trial operation is carried out on a sewage treatment plant where no sludge treatment has been available so far, different solutions are possible in practice, depending on the specific conditions on site: Mechanical thickening: The thin sludge is mechanically thickened to approx. 5% with a mobile plant and transported to the nearest sewage treatment plant with free capacities in a digester. For mobile thickening, HUBER uses a trial plant with the HUBER Disc Thickener S-DISC. Mechanical dewatering: The thin sludge is mechanically dewatered with a mobile unit to approx. 25% DR and disposed of together with the screenings. For mobile dewatering, HUBER uses a trial plant with the HUBER Screw Press Q-PRESS ® . Static thickening: Existing tanks or a converted polishing pond can be used as static thickeners. The thickened sludge can then be disposed of at the end of the trial operation. In the case of bridging or trial operation, the logistics for the disposal of the thickened sludge must be ensured by the plant operator. The amount of screenings/sludge produced must not be underestimated. If the mobile plant is fed with the HUBER Drum Screen LIQUID at maximum throughput, a 7 m³ container may be filled overnight despite thickening with a HUBER Disc Thickener S-DISC. Whatever the application, the advantages of the mobile trial plant with the HUBER Drum Screen LIQUID are: High operational reliability Small space requirement High flexibility Sufficient throughput capacities for wastewater treatment plants from 10,000 - 50,000 PE HUBER Drum Screen LIQUID - trial units offer: 50 - 250 m³/h wastewater screening Volume control proportional to the sewage treatment plant inflow HUBER Operation Control HOC system with online data recording Fig. 1: Validation operation - a pump sump was retrofitted into an existing buffer tank with concrete shaft segments. The demonstration plant HUBER Drum Screen LIQUID is fed with the effluent from the mechanical pre-treatment system. The effluent (screened wastewater) of the LIQUID machine flows by gravity back into the buffer tank Fig. 2: Bridging operation - pump feeding of the demonstration plant HUBER Drum Screen LIQUID (right container) and discharge of screened wastewater by gravity, thin sludge thickening with a mobile HUBER Disc Thickener S-DISC (left container) Fig. 3: Thickened primary sludge from the HUBER Drum Screen LIQUID demo unit after a HUBER Disc Thickener S-DISC Fig. 4: Validation operation - HUBER Drum Screen LIQUID demo unit (right container) combined with the HUBER Screw Press Q-PRESS® demo unit (left container) Fig. 5: Mechanically dewatered thin sludge from the HUBER Drum Screen LIQUID demo unit in a HUBER Screw Press Q-PRESS® Fig. 6: Bridging operation - polishing pond converted into a settling pond for static thickening of the thin sludge from the HUBER Drum Screen LIQUID demonstration plant[...]

[...]Efficient wastewater pre-treatment to achieve indirect discharge quality Compared to municipal wastewater, the generated industrial wastewater is much more polluted, and the composition of the wastewater varies greatly. In particular, pollution by organic or inorganic substances depends on the sector of industry, the product range, the production methods and, last but not least, the individual usage behaviour. Many industries discharge their wastewater directly into the sewer and must therefore comply with certain limits for COD and solids, ensure pH neutrality and reduce grease content to a minimum. Industries that operate their own biological wastewater treatment plant must also carry out this pre-treatment in order to ensure the functionality and economic operation of the plant. . PROCESS TECHNOLOGY HUBER solutions to reduce COD, fat and solids in industrial waste water Part of this industrial pretreatment is usually: Screens for mechanical preliminary treatment Grit traps (where grit is present) Dissolved air flotation plants with chemical treatment stage Sludge treatment for resulting flotate sludge Depending on the industry sector, type of wastewater and degree of contamination, the right machines and components have to be selected, as for example high grease contents require screen cleaning with high pressure or hot water. HUBER has decades of experience in dimensioning and selecting the optimum machine technology for each industry wastewater pre-treatment application. As different requirements also demand different types of systems, HUBER has developed a wide range of various screens, fine screens, flotation plants and sludge treatment systems, which are in use in thousands of installations worldwide. Separated and compacted screenings and grit are disposed of, while separated flotate (= organics) is usually further utilised in anaerobic sludge treatment as co-substrate or in approved biogas plants.[...]

[...]Development of innovative sewage treatment technology as a component for energy self-sufficient treatment plants For the process changeover from aerobic to anaerobic sludge stabilisation fine screening systems represent a highly interesting alternative when it comes to reducing the solids loads in the biological treatment stage. Fine screening achieves better removal rates than a conventional primary settling tank but on a much smaller footprint and with significantly lower investment costs. Changeover from aerobic to anaerobic sludge stabilisation reduces aeration costs by at least 20-25%. The reduction is achieved through removal of the carbon upstream of the biological treatment stage of the wastewater treatment plant, e.g. by building a preliminary settling tank or installing a HUBER fine screening system. Due to continuously increasing energy costs, changing from an aerobic to an anaerobic process frequently makes sense for sewage treatment plants for economic reasons. The research project E-Klär (BMBF FKZ 02WER1319F) examines among other issues the "Increased gas yield through solids input". In cooperation with the research institution ISA (university of Aachen) and the water authority Ruhrverband processes for the removal of pollution loads in wastewater flows are tested on an industrial scale and analysed on a scientific level. HUBER supplies the mechanical equipment that is required to carry out the tests. The central element of the research project are the 68 municipal sewage treatment plants operated by the Ruhrverband. These are plants of all sizes and cover a wide spectrum of different processes for sewage treatment. On many of them, whether bigger or smaller, block heat and power stations are installed to provide for the energetic use of the biogas that is generated by the anaerobic sludge stabilisation process. On most of these sewage treatment plants the electric and thermal energy is mainly used directly on site. The project with a duration of three years started at the beginning of 2015. Here is a summary of the test results: Results of carbon removal with a HUBER Drum Screen LIQUID Reduction achieved for filterable solids with a plant size of 28,500 PE Reduction achieved for total COD with a plant size of 28,500 PE Reduction achieved for filterable solids with a plant size of 17,000 PE Reduction achieved for total COD with a plant size of 17,000 PE The results of the tests carried out on two sewage treatment plants are presented in the following. The design size of the sewage treatment plants is 17,000 PE and 28,500 PE. On both plants, the HUBER Drum Screen LIQUID was operated for approximately five weeks, with different throughputs of up to 35 l/s. Both plants have installed a 6 mm preliminary screen and a conventional grit trap. The wastewater was taken from the channel downstream of the grit trap and pumped to the HUBER Drum Screen LIQUID. Figure 6 shows the HUBER Drum Screen LIQUID in compact design with (optional) downstream mechanical screenings thickening which is performed by a HUBER Wash Press WAP® liquid installed in a tank. Samples marked "2-h" are two-hour random samples (composite samples) taken during the day, while samples marked "10 h" are ten-hour composite samples taken during the night. Additionally, time-proportional 24-hour daily mixed samples were taken and analysed. The figure on the right show that an average total COD reduction of 51-57% and AFS reduction of 71-72% could be achieved on both sewage treatment plants with the use of a HUBER Drum Screen LIQUID. These results were achieved without adding polymer. The separation capacity of conventional primary settlement tanks with material residence times of 0.5 to 1 h is 25% COD reduction and 50% AFS reduction according to ATV A 131. Sewage treatment plant 1 with 28,500 PE had a rate of external water of approximately 75%. This background explains the significantly reduced concentrations of AFS and COD in the inflow. Despite of the high rate of external water, more than 90% of all measurements showed a COD elimination of more than 50%. The low AFS concentrations could also be reduced by on average 72%. On sewage treatment plant 2 with 17,000 PE, the inlet concentrations of > 600 mg/l COD are high compared to plant 1. The reduction achieved on this plant was 71% on average for AFS and 51% for COD. These excellent outcomes result from the special functional principle of the HUBER Drum Screen LIQUID. The screen is equipped with a fine 0.1-0.3 mm stainless steel mesh. Due to these small apertures the screen retains even finer particles which could not be removed by primary sedimentation. Through screening alone, the HUBER Drum Screen LIQUID achieves results comparable to a conventional primary settlement tank. Due to the additional effect of deep bed filtration, however, the fine screen is able to remove much more COD and AFS from the wastewater flow than a conventional primary settlement tank. Deep bed filtration is enabled by the filter carpet that is formed inside the drum by the separated solidst. Contrary to a primary settlement tank, it is possible to specifically influence AFS and COD removal efficiency of the drum screen by changing the mesh aperture of the screen. Depending on the specific length of the HUBER Drum Screen LIQUID, flow rates of up to 200 l/s per machine are possible. This allows for space-saving solutions when it comes to reducing the strain on overloaded sewage treatment plants or increasing the capacity of the plants. Such a system is also suitable to be used if run-down aeration tanks need to be refurbished as one of several aeration tanks can be shut down during its refurbishment without any loss of capacity on the sewage treatment plant. The installation of a HUBER Drum Screen LIQUID needs only about one tenth of the space of a primary settlement tank and is therefore perfect to be used as a replacement for the primary clarifier especially on sewage treatment plants where the available space is too limited to install a conventional primary settling tank (figure on the right). Process description of the HUBER Drum Screen LIQUID for carbon removal To achieve the aim of mechanically reducing the loads in the bio-system and replace a primary settling tank, a HUBER Drum Screen LIQUID was used in place of a primary settling tank when changing from an aerobic treatment process to anaerobic treatment with sludge digestion. The HUBER Drum Screen LIQUID is a new development that has been designed on the basis of the operation principle of the traditional HUBER Rotary Drum Screen ROTAMAT® units. The innovation uses external screenings treatment and allows for flexibility in location selection for the screenings predewatering system. The screenings can simply be flushed into the screenings press through a pipeline, against the direction of the wastewater flow from the drum screen. Furthermore, a trough with connected pipeline is installed inside the screen drum that provides an extremely flexible and easy solution for screenings transport to the HUBER Screenings Wash Press WAP® liquid. The maximum filter surface can be utilised due to the horizontal position of the screen drum and at the same time a very high maximum possible upstream level. Very high throughputs with excellent separation results can thus be achieved. Options of Screenings Thickening In the HUBER Screenings Wash Press WAP® liquid, which has especially been developed for the treatment of fine screenings, the generated screenings are predewatered to DS contents of up to 10% without the use of any polymers. The dewatering degree can directly be influenced as the HUBER Screenings Wash Press WAP® liquid is equipped with exchangeable perforated plates. The screenings separated by the fine screen are flushed into the wash press through a gravity pipeline. A part of the liquid phase can drain off through the very fine perforated plate inside the wash press. In practice, a DS content of approx. 3-4% has turned out to be reasonable for the digester. The thickened screenings from the WAP® liquid can directly be delivered into the digester by means of an eccentric screw pump. As applicable, the sludge can alternatively be treated in a continuous thickener, or the primary and secondary sludge are thickened together. Owing to our extensive experience of the past years and the reliable operation principle of the Drum Screen LIQUID, it was possible once more to successfully develop an innovation for the future – another major step towards an energy self-sufficient sewage treatment plant.[...]

[...]Davidstowe, UK Following successful trials using the HUBER Technology pilot plant Screw Press Q-PRESS®, Dairy Crest Creamery in Davidstowe went ahead and purchased 2 off HUBER Screw Press Q-PRESS® units complete with polymer dosing, pumps and controls. This has now been followed by a third order to cover for expansion of the effluent plant which has now been successfully installed and commissioned. Four different sludge streams arise from Dairy Crest’s modern effluent plant and it was initially thought they might behave differently with regards to polymer requirements and dewatering potential. Bench tests were carried out on all 4 streams individually and various combinations were followed by full scale tests and it was agreed that the 4 streams could be combined and an acceptable result could be achieved by combining all 4 streams. The dissolves air flotate sludge aided the dewatering of the biological sludge and a suitable polymer was found to bind up the fines in all 4 feeds. By combining all 4 streams the system was simplified and a large saving in pipework and controls was made. Originally the DAF sludge was dewatered on a Belt press and the other sludge’s were not possible to dewater efficiently on the belt press so they were taken away by tanker in a slurry form at ~4% Dry Solids. The belt press was awkward to use and the building required constant housekeeping to keep it clean and tidy. The totally enclosed HUBER Screw Press Q-PRESS® is much cleaner and reliable to operate. On the permanent installation HUBER supplied all the pumps which pump the combined sludge into a common sump, 3 off Screw Press Q-PRESS®, the polymer dosing package, the conveyors and the control panel. Each Q-PRESS® discharges the cake via a conveyor into a farm trailer for spreading by a solids muck spreader as opposed to liquid spraying. The volume reduction was 4 to 6 times the feed volume thus reducing transport and disposal costs. HUBER Technology worked with Williams Industrial Services to install the 3rd Q-PRESS® and were pleased to of found the solution that Dairy Crests required. The permanent Q-PRESS® units have now been running for over 6 months and consistently supply cake suitable for spreading by muck spreader and clean filtrate to return the flow to the effluent plant. The Q-PRESS® with its low power and volume reduction fit well in the ethos of Dairy Crest in reducing their environmental impact of running Europe’s largest mature Cheese production plant. The trial plant is supplied as a complete package and incorporates; the Q-PRESS®, the polyelectrolyte (poly) dosing unit, the sludge feed pump, the flocculation reactor and the control panel. The container also comes with a conveyor that is positioned under the discharge point from the Q-PRESS® and allows cake to be deposited outside the container. Key benefits of the Q-PRESS®: Digestate volume reduction Reduced storage and transport costs High quality fertilizer For more information please contact Tony Clutten, Process Sales Manager Tel: 01249 765050 Mobile: 07525224521 Email: tc@huber.co.uk[...]

[...]Catch basin, rectangular in shape, made of 1.4307 (AISI 304 L) stainless steel. Universally applicable, for retrofitting under manhole covers as protection against ingress of harmful chemicals, liquid or similar substances into the manhole. Custom-made to suit the specific local conditions. The cover is made of stainless steel plate, with a centrally raised profile, removable, with two handles. The frame consists of an angle section designed as an outlet channel, provided for bolted fixing inside the manhole under the manhole cover, with integrated ¾“ hose nozzle, for on-site connection to an outlet pipe. Fixing material and drinking water approved silicone as sealing between the wall and frame included. Cover and frame shielded arc-welded and acid bath cleaned before washing, drying and surface passivation. Options 1.4404 (AISI 316 L) stainless steel Air vent DN 150 Lockable version[...]

[...]Charfield, UK As part of the Wessex Water inlet screen replacement projects, HUBER Technology completed the delivery and installation of a new inlet screen and screenings handling project at Charfield STW near Wooton under Edge. Project Profile Installed on site was an old 20mm bar screen discharging into a launder feeding a macerator and licep unit. All the equipment installed were at the end of their asset life and were constantly failing. The inlet screen was also allowing rag to bypass it due to its age. HUBER Technology Supplied HUBER Micro Strainer ROTAMAT® Ro9/700/6 without washwater or compaction, throughput 150 l/s peak flow/700/6 without washwater or compaction, throughput 150 l/s peak flow HUBER Screenings Wash Press WAP®/L size 2 screenings handling unit Control Panels HUBER Launder Channel HLC Objective After an initial site visit, the Wessex Water delivery team gave us a challenge to fit a screen without the normal requirement for washwater ruling out travelling fine screens - HUBER EscaMax® screens. The pumped flow to the screen would peak at 150l/s, which meant that a HUBER Micro Strainer ROTAMAT® Ro9 combined screen would be working on its upper limit. The inlet screen channel was 700mm wide and 900mm deep and was too far away to get a skip local to the screen. We then looked at a screen discharging into a launder feeding a HUBER WAP®/L size 2 compactor. We were also challenged due to a lack of washwater on site. Solution We modified our combined screen (HUBER Micro Strainer ROTAMAT® Ro9) so that it ran without washwater and no compaction, it was essentially a conveyor to elevate the screens into a small washpactor (Washpress WAP®/L). This Inlet screen was one of the first Ro9’s without the washwater feature to be supplied into the UK for the Wessex Water inlet screen replacement projects. This innovative idea of discharging from the Ro9 into a launder was a success and is currently working extremely well. The lack of wash water for the launder resulted in an additional modification - Wessex Water fitting a submersible pump in a chamber upfront of the screen, this chamber had a 6mm perforated plate upfront to prevent large rag blocking the pump. The pump starter was included in our control panel and was linked to the screen start. Adrian Heneghan, Area Manager for HUBER Technology said “ This was a considerable challenge for all involved and the end result was a great success. The communication between the client and the contractor was crucial. This type of installation could be used on sites where wash water is limited. ”[...]

[...]Targeted dosing of chemicals for better clarification performance with less consumption The use of chemicals such as acids, alkalis, flocculants or flocculation aids is necessary in many areas of wastewater treatment and sludge treatment in order to achieve the required process performance. Ideally, the right chemicals should be added in exactly the right dosage to avoid either underdosing or overdosing. While underdosing leads to reduced performance, overdosing leads to increased operating costs and can also have a negative impact on the process. The fluctuations in concentration and volume that often occur in practice make it difficult to achieve exactly the right dosage, and attempts are made to get these fluctuations under control with large mixing and equalisation tanks. The disadvantage here, however, is the space and investment required for basins and aggregates for the necessary homogenisation (e.g. circulation pumps or aerators). Often, however, the fluctuations cannot be completely eliminated despite the equalisation basins, so that in practice manual intervention is always necessary to adjust dosing to the respective situation. In the best case, this manual intervention reduces chemical costs, but leads to increased personnel costs. Optimal Chemicals Dosing for Flotation Systems A typical wastewater treatment process in which chemicals are used is dissolved air flotation . The HUBER Chemicals Dosing DIGIT-DOSE system was developed especially for this process. It reliably ensures that the HUBER Dissolved Air Flotation Plant HDF is always fed with wastewater containing the optimum amount of chemicals. In this way, the best cleaning results are always achieved with minimum costs for chemicals and personnel.[...]

[...]Circular Grit Traps Separation of grit and other mineral materials transported with the wastewater with centrifugal force HUBER Circular Grit Trap HRSF Circular Grit Traps HUBER Vortex Grit Chamber VORMAX Circular Grit Traps Circular and vortex grit traps separate the grit from the wastewater with centrifugal force. Separation of the grit particles is supported by the rotational motion of the wastewater. Due to the radial rotation, the solids are very quickly collected within the centre of the grit chamber from where they can be separated and discharged.[...]