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[...]Micro Screens and Filter Advanced wastewater treatment for removal of suspended solids to improve clarifier effluent quality Products for Micro Screening and Filtration Disc Filter Pile Cloth Media Filter Sandfilter Active Carbon Filter Reliable and innovative solutions for advanced wastewater treatment HUBER offers reliable and innovative solutions for advanced wastewater treatment by means of filtration, active carbon filtration, micro-screening and pile cloth media filtration. This leads to a significant effluent quality improvement in addition to the following treatment stages - for biologically treated wastewater and for raw wastewater. Filtration of biologically treated wastewater serves for removal of suspended solids remaining in clarifier effluents. Such suspended solids contain about 50 % carbon, almost 10 % nitrogen and over 1 % phosphorus. Around 1 mg/L (ppm) of phosphorus remain in the effluent, even if the biological treatment stage is designed for enhanced biological phosphorus removal and/or chemical phosphorus precipitation. Subsequent filtration is necessary where stringent phosphorus limits must be reliably maintained. Micro-screening is also possible for the treatment of raw wastewater which is discharged into the watercourse. Thereby almost all solids and, if required, also phosphates are removed.[...]

[...]HUBER STEP SCREEN® Reliable Separation and Transport of Screenings for High Separation Efficiencies and any Flow Rate Products and Variants HUBER Fine Screen STEP SCREEN® SSV STEP SCREEN® HUBER Fine Screen STEP SCREEN® SSF STEP SCREEN® The success and broad acceptance of the STEP SCREEN® system is due to its function, the easy-to-understand operation method, the simple cleaning method without any aids (self-cleaning effect according to the counter current principle), easy servicing, its ability to handle very large screenings volumes and its operating reliability. Contacting us means speaking with a partner who has more than 30 years experience with screens, their layout, construction, manufacture, operation and after-sales service and with several ten thousands of references worldwide is the unrivalled market leader in mechanical preliminary wastewater treatment.[...]

[...]Belt Screens Sturdy wastewater screens with rotating perforated plate or mesh screening elements for maximum solids separation Products and Variants HUBER Belt Screen EscaMax® Belt Screens HUBER Band Screen CenterMax® Belt Screens HUBER Band Screen DiscMax® Belt Screens HUBER Band Screen DualMax® Belt Screens HUBER Belt Screens of the Max-Family Offer Two-dimensional screening High separation efficiencies also for fibers and hair Perforations ≥ 1 mm Also for deep channels, high water levels and high throughputs Space-saving design Easy to retrofit into existing channels[...]

[...]Rope and Chain Pull Rakes Sturdy cable or chain operated coarse screens protect pumping stations and wastewater treatment plants Products and Variants HUBER Grab Screen TrashLift Rope and Chain Pull Rakes HUBER Basket Screen CageLift Rope and Chain Pull Rakes HUBER Wastewater Screens with Rope or Chain Hoists Offer: Reliable removal of all types of coarse material Space-saving design due to vertical installation Bar spacings from 20 mm to 150 mm Easy to retrofit into existing channels, pumping stations and intake shafts[...]

[...]Grit Washing Plants Separation of organics from the mineral particles. The clean grit is removed through a classifying screw, statically dewatered and discharged into a container. The clean grit is removed through a classifying screw, statically dewatered and discharged into a container. HUBER Coanda Grit Washing Plant RoSF4 Grit Washing Plants HUBER Grit Washer RoSF4 T Grit Washing Plants HUBER Grit Washer RoSF G4E Grit Washing Plants Grit from grit traps of wastewater treatment plants The grit contained in the wastewater is usually removed in grit traps by gravity or centrifugal force to protect downstream equipment. Various different grit trap systems are available for this purpose which however separate not only the grit but frequently also many of the organic particles, dependent upon the hydraulic load (inflow). The separated particles are then pumped from the grit trap to a grit classifying unit (screw or pilgrim step classifier) which remove the solids from the flow without any differentiation. As a result, the loss on ignition of the classified grit trap material varies from 10 % to 80 % depending on the screen bar spacing and inflow. The water content of the grit trap material is accordingly high (50 - 80 %). The result are inevitably high costs for removal, transport and disposal, and in addition very bad hygienic conditions. Grit from sewer systems, gully waste, road refuse These raw materials are more or less contaminated with organics (sludge, leaves, etc.), but they contain also foreign matter that is similar to domestic waste (such as cans, screenings, stones, etc.), and a considerable amount of water. Additionally, the individual raw materials (grit, organics, foreign matter) vary seasonally so that their loss on ignition will range from 5 % to 80 % and their water content from 40 % to 90 %. This results in inevitably high costs for dewatering, removal, transport and disposal. FAQ Frequently Asked Questions Why is grit washing needed? In municipal wastewater treatment, grit is separated in a grit trap. This separation takes place by sedimentation, i.e. the grit settles in the grit chamber after sufficient retention time. However, since there are not only mineral substances such as grit in the wastewater, but also many organic solids, these also settle to a greater or lesser extent. As a result, when the grit is discharged from the grit chamber, it sometimes contains a large amount of organic solids. This contamination of the grit with organic matter hinders, among other things, cost-effective landfilling or reuse of the grit. Grit washing with a HUBER Grit Washer RoSF4 solves this problem and produces clean grit with an organic content of less than 3% loss on ignition, the HUBER Grit Washer RoSF G4E reduces the organic content to ≤ 5%. What are the characteristics of a good grit washing system? A good grit washing system is characterised by its ability to wash out the organic substances in the grit so that the loss on ignition in the washed grit is < 3%. In addition to the effective separation of organic and mineral components, the retention of fine sands is also decisive in practice, which is taken into account in the design of HUBER Grit Washing Plants . Can sewer grit be washed together with sewage treatment plant grit? HUBER has solutions for the processing of sewer grit and grit from sewage treatment plants as well as road sweepings. Depending on the quantities and composition of the material to be processed as well as other general conditions, we design a tailor-made HUBER solution for grit treatment . Why should subsequent grit washing be implemented after grit separation? Conventional grit classifiers separate virtually all solids contained in the grit trap effluent. This classified and partly dewatered grit is usually more or less contaminated with organic particles. With further treatment in a subsequent grit washer , the organics are separated from the mineral particles. What is the difference between a grit washer and a grit classifier? Both the grit washer and the grit classifier are fed with a grit-water mix. In the machine, the grit is separated from the water. In contrast to the grit classifier, the grit washer is able to wash the separated grit. This means that the separated grit is freed from organic components as far as possible. The grit washer thus produces grit that is almost free of organic matter, whereas the separated grit in the grit classifier may contain a considerable amount of organic matter. What is the advantage of classification with simultaneous grit washing compared to simple classification? Due to the additional washing, the organic content in the discharged grit can be guaranteed below 3%. This leads to possible lower disposal costs and volumes.[...]

[...]Dissolved Air Flotation Plants Effective and efficient wastewater and process water treatment for industrial applications through flotation with micro bubbles HUBER Dissolved Air Flotation Plant HDF Dissolved Air Flotation Plants HUBER Dissolved Air Flotation Plant HDF S Dissolved Air Flotation Plants Extensive pre-treatment of used process water is reasonable and necessary for both economic and legal reasons Process water is needed in many production processes as a solvent, for production of material, or for cleaning purposes. Water is recirculated and reused for economical and environmental reasons. Grease, oil, fat, floating and suspended solids, settling material, and dissolved components need to be separated to provide good and uniform water quality. Recovery of valuable product from the water may be another additional objective. Proper pre-treatment ensures that the applicable discharge standards for problematic substances (e.g. heavy metals, HC, AOX, etc.) are met and that the effluent discharge fee is minimized. Conventional gravity clarifier sare often incapable to achieve sufficient pre-treatment for the reliable compliance with effluent standards or for extensive reduction of the contaminant load upstream of subsequent treatment stages. Various types of flotation processes have been developed for such separation requirements, whereof dissolved air flotation with pressure water recirculation has proven most effective. The use of a multistage rotary pump for recycle water saturation with air eliminates the need for costly pressure tanks with high maintenance requirements.[...]

[...]Flotation Plants Effective and efficient treatment of industrial wastewater and process water allows recirculation and reuse Dissolved Air Flotation Plants Chemicals Dosing Efficient wastewater and process water treatment for industrial applications through flotation with micro bubbles Grease, oil, fat, floating and suspended solids, settling material, and dissolved components need to be separated to provide good and uniform water quality. In addition, clogging and excessive wear of pipelines and other associated equipment is prevented, which increases the operating reliability of the production plant. Where used process water is discharged as wastewater, pre-treatment is often required to prevent toxic or otherwise harmful substances from entering the sewer system and reduce disposal costs. Conventional gravity clarifiers are often incapable of achieving sufficient pre-treatment. Various types of flotation processes have been developed, whereof dissolved air flotation with pressure water recirculation has proven most effective. The HUBER Dissolved Air Flotation Plant provides a significantly improved flotation process with a special inlet structure that provides optimum control of the flow within the flotation tank. HUBER Dissolved Air Flotation Plants are successfully operating for a very wide variety of industrial and municipal applications.[...]

[...]ROTAMAT® Screens Screening – Washing – Transport – Dewatering in one unit A system for screens with maximum separation efficiencies and throughput, proven in thousands installations world-wide. A system for screens with maximum separation efficiencies and throughput, proven in thousands installations world-wide. Products and Variants HUBER Fine Screen ROTAMAT® Ro1 ROTAMAT® Screens HUBER Rotary Drum Fine Screen ROTAMAT® Ro2 / RPPS / STAR ROTAMAT® Screens HUBER Micro Strainer ROTAMAT® Ro9 ROTAMAT® Screens HUBER Complete Plant ROTAMAT® Ro5 ROTAMAT® Screens | Complete Plants HUBER Complete Plant Hydro Duct ROTAMAT® Ro5 HD ROTAMAT® Screens | Complete Plants HUBER Coanda Complete Plant ROTAMAT® Ro5 C ROTAMAT® Screens | Complete Plants HUBER Pumping Stations Screen ROTAMAT® RoK4 ROTAMAT® Screens Screening Separation – Washing – Transport – Dewatering in one unit Based on the ROTAMAT® principle "screening – washing – transport – dewatering in one unit" a complete ROTAMAT® family was developed and successfully launched onto the worldwide wastewater treatment market. All ROTAMAT® screens work according to the unique system that has been sold for more than a thousand installations worldwide. The space-saving screens can be installed into either a channel or tank. Depending on the screen size and bar spacing throughputs of up to approx. 3,000 l/s (10,800 m³/h) per unit can be achieved. The machines are completely made of stainless steel. Their unique principle ensures maximum separation efficiencies and maximum throughput.[...]

[...]Machines for Sludge Screening Efficient and reliable sludge screens for removal of disturbing solids HUBER Sludgecleaner STRAINPRESS® Machines for Sludge Screening HUBER Sludge Acceptance Plant ROTAMAT® Ro3.1 Sludge Acceptance Plants | Machines for Sludge Screening HUBER Sludge Acceptance Plant RotaShield® Sludge Acceptance Plants | Machines for Sludge Screening Sludge screening for removal of disturbing solids prevents disruption of subsequent sludge treatment processes and equipment Sludge screening is a mechanical treatment stage that primarily achieves homogenisation and separation of foreign matter and ensures therefore undisturbed further treatment of the sludge, irrespective of the subsequent treatment methods applied. Operating problems, such as clogging of pipelines, pumps, heat exchangers or downstream filtration units, tressing on stirrers and aeration plants, scum in settling and sludge tanks as well as damage in downstream drying units, can reliably be prevented by using HUBER sludge screens.[...]

[...]HUBER Grit Washing Plants and System Components Separation of organics from the mineral particles Grit Washing Plants Wash Drum Grit from grit traps of wastewater treatment plants and grit from sewer and road cleaning are heavily contaminated with organic matter and debris. The high content of organic material, the wide volatile solids ratio of 10 to 80%, is the reason why such grit slurries do not dewater well. The solids concentration remains somewhere between. The common performance criteria for the quality of grit removal are: The capture rate of 0.2 mm diameter grit particles; and the volatile solids concentration of the removed grit. The end product after effective grit treatment is a reusable product with a volatile solids ratio of less than 3 % and a water content of below 10 %. Such grit treatment not only reduces the volume and mass of the removed grit, but also the disposal costs. If the clean grit product is reused, e.g. for road bedding, costs for grit disposal could be avoided.[...]