Biosolids Management And Headworks

Biosolids Management And Headworks
ACRS automatic scraper-strainers from Acme Engineering Products

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Belt Filter/Rotary Presses

Belt Filter Press

The 1.7-meter trailer-mounted belt filter press from Bright Technologies includes a control room with insulated FRP walls, air conditioning, electric heat, a refrigerator, stainless steel desk, tool storage, locker, closed circuit TV and remote operator controls. The modular design allows the room to be custom manufactured to fit most single-drop trailers. Units are made for rapid setup with folding conveyor and operator walkways. No special lifting equipment is required. 800/253-0532;

Three-Belt Press

The Sentry three-belt press from Charter Machine Company has a 4-foot initial gravity deck for easy viewing. A belt drive and variable-frequency drive enable belt speed selection independent of the pressure section. This makes thin biosolids become more manageable and allows higher cake solids to be achieved. Belt alignment is maintained by a center-pivot design, minimizing belt stretch. A vertical roller arrangement allows easier conveyor maintenance. Rilsan-coated one-piece pillow block housings with gasketed end plates house self-aligning double-roll spherical-type bearings with quadruple lip seals. Machined and polished shafts are held in place with a lock ring, eliminating slippage or misalignment. 732/548-4400;

Container Filter

Sludge Mate container filters from Flo Trend Systems dewater biosolids and other materials. The closed-system design provides complete odor control, prevents spillage, minimizes maintenance and shields against weather. Units have 10-gauge reinforced walls and a seven-gauge carbon steel floor. Options include peaked roofs with gasketed bolted-down access hatches, drainage ports, inlet manifolds, floor filters and side-to-side rolling tarps. Units in 5- to 40-cubic-yard capacities available as roll-offs, on trailers and tipping-stand mounted. 713/699-0152;

Rotating Biosolids Press

The Dehydris Twist from Infilco Degremont uses a rotating cylinder and moving piston that travels within the cylinder to continuously press biosolids, allowing water to pass through flexible drainage elements. Biosolids entering the cylinder are continuously rotated and pressed by the piston to reach the limit of mechanical dewatering. The cake is automatically discharged. Digested biosolids can be dewatered to auto-thermal conditions before incineration, lowering capital and operational costs for drying. 804/756-7696;

Screw Press

The ACAT screw press from Kusters Water, a division of Kusters Zima Corp., offers slow rotational speed, low maintenance, low noise and low energy consumption. All components in contact with biosolids are made of corrosion-resistant materials, such as 304SS or 316SS. The base frame is made of carbon steel and factory-painted. The only wear part is the screw sealing, which lasts 5,000 to 15,000 hours. 864/576-0660;

Rotary Fan Press

The compact, slow moving, quiet design of the Rotary Fan Press from Prime Solution Inc. integrates with wastewater facilities, often with no building modifications. Continuous dewatering within enclosed vertical channels yields high throughput per unit of floor space. It offers easy and fast startup and shutdown and minimal operator attention. Pressure increases as biosolids move slowly through a tapered channel. Friction intensifies as the material compresses against two rotating filter screens. Filtrate drains through the screens. Cake averages 18 to 24 percent solids and reaches up to 60 percent in some applications. 269/694-6666;

Mobile Belt Filter Press

The Model 3DPTM trailered mobile belt filter press from Stewart Spreading has a variable-speed paddle wheel. It provides full belt-width distribution, and an independent gravity zone that allows for higher production capacity and higher cake solids. A spiral wedge applies increasing cake pressure over the entire length of the belt for effective expressing of filtrate with excellent cake retention. A vertical arrangement allows filtrate pans under each roll to keep filtrate from falling on adjacent rolls, eliminating filtrate reabsorption and improving cake solids. 815/695-5667;


Decanter Centrifuge

The ALDEC G3 decanter centrifuge from Alfa Laval offers a 2Touch control package that makes it easy to monitor, adjust and improve all operating parameters to meet changing requirements and varying inputs and conditions. The smaller conveyor diameter makes room for more liquid in the pond and allows higher bowl wall pressures for a 10 percent boost in processing capacity or drier cake. Power Plates reduce the power consumption by up to 40 percent and reduce CO2 emissions. 866/253-2528;



The Dimminutor7 from Franklin Miller provides automatic screening and grinding of wastewater solids in straight-through channels and wet wells. It reduces plastics, wood, rags and other solids to fine bits, protecting pumps and other downstream equipment. It uses a smooth, continuously rotating design with high torque. Three bidirectional rotary cutters intermesh at close clearance with stationary cutters, reducing solids to a size small enough to pass through a sizing screen. 973/535-9200;

Submersible Shredder Pump

The S3SHR 3-inch hydraulic-drive submersible shredder pump from Hydra-Tech Pumps continuously rips and shears solids with 360-degree shredding action. It uses an open-vane shredder impeller with tungsten carbide cutting tip. Compact size allows it to fit in tight spaces. A guide rail assembly is available for stationary applications. Combined with HT11 to HT20 power units, it handles flows up to 450 gpm. The safe and variable-speed hydraulic drive can be used where electric power is hazardous or impractical. 570/645-3779;

Screw Centrifugal Pump

Triton screw centrifugal pumps from Vaughan Company handle thick biosolids, large or stringy solids, shear-sensitive fluids and delicate or highly abrasive materials. Features include steep performance curves, nonoverloading power characteristics, heavy-duty power frames and a flushless mechanical seal to eliminate water flush requirements. A water-flushed mechanical seal or packing is available. 888/249-2467;

Grit Handling/Removal/Hauling

Continuous Bag System

The Longofill continuous bag system from Paxxo can connect to the discharge point of machines used to move, dewater or compact screenings, grit and biosolids. Material is then deposited in a 90-meter-long continuous bag for odor containment and spillage control. The cassette bag is easy to seal, and the material and odors are trapped inside, cutting down development of bacteria and fungus spores. 770/502-0055;

Grit And Grease Removal System

The Grit & Grease removal system from Schreiber has two rectangular concrete channels that separate and collect grit and grease. One channel settles particles and the other collects grease using an air-skimming system. A rotating spiral flow pattern washes organics from the grit and deposits it in a trough at the bottom of the channel. A grit pump on a traveling bridge pumps the grit to an elevated trough sloped at one end of the structure to transfer the grit slurry to a grit classifier for further washing and dewatering. Floating grease is transported to one end of the channel by an air-skimming grease removal system. Air is directed onto the surface of the grease channel in the direction of a rotating screw conveyor, which lifts the grease into a collection container. 205/655-7466;

Efficient Grit Removal System

The PISTA 360 from Smith & Loveless removes grit efficiently with a V-FORCE BAFFLE that prevents short-circuiting and allows 360-degree rotation through the inlet and outlet. Increased chamber velocity during low flow enables an extended grit path so that more grit is captured on the flat floor. Flow velocity stays at 3.5 feet per second peak and 1.6 feet per second minimum with no additional downstream flow control device. It improves control of water elevations without a submerged weir resulting in a smaller footprint and construction cost savings. The system ensures 95 percent grit removal efficiency down to a 140-mesh particle size. Units range from 0.5 to 10 mgd capacity and can be constructed of concrete or steel. 800/898-9122;

Low-Moisture Grit Generator

The WEMCO Hydrogritter from Weir Specialty Pumps / WEMCO Pump includes a pump, cyclone separator and dewatering classifier. The pump pulls grit from the grit chamber and feeds it to the cyclone separator, which concentrates it and reduces the volume of liquid so that a smaller and more economical classifier can be used. The slurry from the pump is converted to rotational motion as it enters the cyclone inlet head. The resulting centrifugal force acts on the grit particles, driving them to the cyclone wall where they migrate down decreasing-diameter sections, discharging through the cyclone apex. The grit is then concentrated and discharged into the spiral classifier, where it is dewatered. The system can remove 95 percent of grit size 150 mesh and larger with a specific gravity of 2.65. 801/359-8731;

Screening Systems


ACRS automatic scraper-strainers from Acme Engineering Products provide automatic removal of solids and large particles using only dirty water for blowdown. They are available in sizes up to a 66-inch body in steel or corrosion-resistant metals. They remove large, irregularly shaped solids and contaminants from wastewater and nonpotable water systems and protect downstream fine filtration equipment. Screens are available down to 75 microns. The strainers are custom fabricated and fit existing strainer locations, avoiding piping rework. Designs are available to handle viscous fluids like biosolids and extremely high solids loading. 518/236-5659;

Adaptive Screening System

The Duperon FlexRake utilizes FlexLink technology to flex and pivot around all types of debris — from standard influent to logs, tires and sewer plugs. This capability assures that all debris is removed at the bar screen, without alarms or operator intervention. The Adaptive Technology recognizes the variability of wastewater influent and provides reliable process protection, regardless of what comes into the channel. 800/383-8479;

Self-Cleaning Fine Screen

The CleanFlo Monoscreen self-cleaning fine screen from WesTech Engineering uses a reliable blade and drive system, creating a progressive step motion that allows screenings to be evenly distributed while minimizing water level surges. The result is a screenings capture rate of 82.5 percent. When matched with the CleanWash SWP/CPS dewatering unit, the system maximizes solids capture for almost any headworks operation while minimizing solids for disposal. 801/265-1000;

Septage Receiving Stations

Septage Acceptance Plant

The Raptor septage acceptance plant from Lakeside Equipment Corporation manages biosolids unloading and protects downstream equipment. The system offers security access and hauler management and accounting software to help maximize revenue generation and produce more energy with minimal maintenance. Properly screened waste can be utilized more successfully in energy production or processed through the facility. 630/837-5640;

Biosolids Handling

Biosolids Data Management Software

The BioSolids Module for Operator10 Wastewater from AllMax Software monitors loading rates for land application of biosolids. It also tracks application locations, methods, amounts and who applies the material. A reporting section allows users to generate limit, application and nutrient reports to maintain proper recordkeeping and stay compliant with reporting requirements. Its use enhances communication between the preparer, applier and landowner. 800/670-1867;

Roll-Off Dewatering Unit

The Roll-off Dewatering Unit from AQUA-Zyme Disposal Systems can reduce biosolids volume with reductions in BOD, COD, FOG and TSS. Solids can be landfill-ready in 24 hours. Units can be transported with a standard roll-off truck. The watertight unit has a 1/4-inch steel floor plate and seven-gauge sides, with filter media on the sides, floor and center partition. Other features include a roll-over tarp, quick-connect fittings, dual inlet ports and multiple drain ports with caps. Fifteen- and 30-cubic-yard sizes are in stock, and custom sizes are available. 979/245-5656;

Mobile Rotary Lobe Pump

Mobile rotary lobe pumps from Boerger are self-priming, valveless, positive-displacement units for rapid deployment for spill situations and digester and lagoon clean up. Twenty pump models in six series are offered with pulsation-free operation, fully reversible rotation, dry-run capabilities and flow rates up to 5,000 gpm. All wear parts can be replaced through the front cover without removing pipe or drive systems. Suction and pressure hoses can be installed in minutes. 612/435-7300;

Collector Monitoring System

The SmartGuard collector monitoring system for rectangular clarifiers from Brentwood Industries identifies collector system overloads that cannot be detected by shear-pin or torque monitoring devices. The system provides two zones of monitoring via sensors. Embedded magnets in the lower-rear idler sprockets allow the system to identify irregular sprocket motion. Flight misalignment is detected by cam assemblies as each flight passes over the head shaft. Early detection helps wastewater plants avoid system failures by controlling up to four mechanisms, including longitudinal collectors, cross-collectors, scum pipes and screw conveyors. 610/374-5109;

Container Cover System

The LEVEL LODOR container cover system from JDV Equipment Corporation helps reduce operator time and the building footprint, while keeping plant odors and solids exposure minimal and providing efficient leveling of solids. The system has a low power requirement, stainless steel construction, odor control and standard safety devices. The fully automated system levels biosolids in roll-off containers to save time and handling of potentially hazardous or infectious material. It protects dried solids from exposure to weather. 973/366-6556;

Biosolids Cake Conveying System

The NEMO BF/SF biosolids cake conveying system from NETZSCH Pumps North America uses positive displacement pumps that convey dewatered biosolids from filter presses or centrifuges. The customizable rectangular hopper and force-feed chamber provide direct entry of the product into the rotor and stator. The coupling rod incorporates a positioned-feed screw auger extending over the joints that is always positioned opposite the open cavity of the stator. This gives biosolids cake the shortest possible route into the open cavity, improving chamber filling significantly. Its Friction Loss Reduction (FLR) system reduces pressure, cuts operating costs and improves system life. 610/363-8010;

Progressive Cavity Pump

Progressive cavity pumps from seepex provide valveless flow control for flow stability, especially where turndown is required. They offer gentle, precise handling with virtually no pulsation and can be made of materials to accommodate all types of fluids. The stator is split axially into two halves, compression-fit together using four retaining segments. Simple access to the rotor and stator for inspection dismantling pipelines reduces service time. 937/864-7150;

Solids-Handling Pump

IQ Series pumps from Vogelsang eliminate half the parts in a typical rotary lobe pump wet-end, reducing parts cost and labor. They offer an advanced flow-path design that improves flow and solids handling. An integrated flange design allows a flange to be used in a 90-degree or gooseneck arrangement, keeping the pump flooded to maintain prime and extended dry running. The flange arrangement delivers pulsation-free flow, low shear and high solids handling. 800/984-9400;

Biosolids Heaters/Dryers/Thickeners

Rotary Drum Biosolids Thickener

The IFT rotary drum biosolids thickener from IPEC Consultants consists of a cylindrical drum with progressive series of screen elements. The drum rotates on four wheels mounted on a structural housing. The screens remove free liquids. Biosolids containing 0.5 to 3 percent solids can be thickened to 3 to 15 percent. The biosolids are pumped to the thickener, where polymer is injected before the material enters a tank. A vertically mounted mechanical mixer gently agitates for up to one minute to aggregate the fine solids into a tight floc. The conditioned biosolids flow into the distribution headbox and are fed gently into a screen cylinder. The floc is retained on the screen surface as the liquid flows rapidly through the screen. Filtrate is collected and directed to a bottom outlet. Solids are transported by flights along the cylinder and exit through a discharge chute. 800/663-8409;

Biosolids Drying System

Biosolids drying systems from Komline-Sanderson use steam or thermal fluid with heat supplied from the combustion of natural gas, digester gas, landfill gas or fuel oil, or recovered heat from engines or turbines. The dryer’s shaft, hollow paddles and trough are all heated. The design and low speed with few rotating parts reduces maintenance. Indirect drying reduces off-gases, simplifying odor control. The system produces a Class A granular product for agricultural use or an autogenous paste for use as a green fuel. 800/225-5457;

Thermal Biosolids Dryer

The BioCon thermal dryer from Kruger USA processes biosolids into a marketable end product. The dual-belt dryer creates an end product dried to at least 90 percent solids that meets Class A requirements. The product is suitable for most agricultural applications. Particle-sizing equipment can screen the product to meet nutrient marketers’ specific size requirements. The system can be paired with an end product storage system, such as a bagging station or silo system. 919/677-8310;

Enclosed Biosolids Dryer

The Bioset Process from Schwing Bioset achieves Class A biosolids via the time versus temperature equation and pH adjustment per EPA 503 regulations. Operating costs are reduced due to PFRP approval, allowing process operation at 55 degrees C for 40 minutes. From startup to shutdown the process remains easy to operate and reliable. A completely enclosed system prevents spills and odors. 715/247-3433;

Heat Exchanger

The Type E concentric tube-in-tube heat exchanger from Walker Process Equipment uses counter-flow circulation of hot water and biosolids, providing high heat transfer with low headloss. End castings are removable for cleaning without draining the waterside tubes and include water back-flushing connections. High-pressure units are available for use with egg-shaped or large-depth digester tanks. Controls include non-flow restrictive temperature sensors and glass tube or dial thermometers to measure inlet and outlet biosolids temperatures. 630/892-7921;


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