Biosolids Management and Headworks

Biosolids Management and Headworks
Drum thickener

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Drum thickener

The ALDRUM G3 drum thickener from Alfa Laval increases solids load capacity up to 30 percent within the same footprint as the standard ALDRUM unit. The new feed zone provides lower polymer consumption, while Power Plates reduce power consumption by the ALDEC G3 decanter centrifuges. The Slimline design of the centrifuges and a smaller conveyor diameter provide room for more liquid in the pond and higher bowl wall pressures for a drier cake. 866/253-2528; www.alfalaval.us/wastewater.

Degritting system

Flo Trend's Front Loader Hydrocyclone Combo degritting system combines a gum-rubber-lined steel body hydrocyclone with a Front Loader Container Filter. Underflow from the hydrocyclone with concentrated wet grit is discharged into the container filter. The grit is then retained on the filters inside the container while water exits through discharge ports on the bottom of the unit. 800/762-9893; www.flotrend.com.

Front-clean bar screen

The Catenary bar screen from Fairfield Service Company is a front-clean, front-return configuration with no sprockets, bearings or shafts below the water. The cleaning rakes descend on the upstream side of the bar rack, then turn upward in a Catenary loop, without the use of sprockets. The cleaning rakes engage the bar rack at the channel floor and ascend on the upstream side of the bar screen. Maintenance can be performed without isolating or dewatering the channel. The versatile bar screen can accommodate heavy and varied debris loads.

The unit features a rugged stainless steel design, and options include drive sprocket shear pin or limit switch for mechanical overload protection. The bar screen includes a drive shaft mounted gear reducer or variable-frequency drive, and a dual head shaft model is also available. The unit is designed for municipal and industrial wastewater treatment plants. It can be inclined from 15 to 45 degrees in standard channel widths from 2 to 30 feet. 219/872-3000; www.fairfieldservice.com.

SLOW-TURNING press

The Model 3012 DSP screw press from BDP Industries helps reduce labor related to drying beds, reed beds, bag filters and settling ponds. A positive displacement pump transfers feed slurry from the aerobic digester to the rotary drum thickener on the top of the press. Thickening before dewatering increases throughput. Slow-turning operation and few moving parts reduce wear and maintenance. 518/527-5417; www.bdpindustries.com.

Filter press

The Hy-Pack filter press from Beckart Environmental is available in capacities up to 125 cubic feet. It features polypropylene recessed plates rated at 100 psi, an automatic plate shifter and durable all-welded steel construction. The press helps minimize waste haul-out charges, producing 35-50 percent solids landfillable filter cake. The system is easy to use and fully automated, limiting plant labor for press setup, cake removal and maintenance. 262/656-7680; www.beckart.com.

Chopper pump

The Chopper Pump from Vaughan Company is an economical solution for sewage and sludge pumping. It offers high efficiency, and reduces and conditions solids in pits with large amounts of rags and flushable consumer products. 888/249-2467; www.chopperpumps.com.

Inline grinder

The RotaCut RCX inline grinder from Vogelsang frees workers from entering digesters to direct and unclog the suction pipe. The grinder attacks heavy settled sludge, breaking down solids and homogenizing it to release the pumping unit's full suction capabilities. 800/984-9400; www.vogelsangusa.com.

Biosolids press

The Three Belt Press from Charter Machine Company offers a tower press arrangement of rollers for extremely high cake discharge and low maintenance while incorporating an independent third belt for the gravity deck portion. The gravity belt thickener (GBT) can be used as a thickening unit only. The low gravity deck enables the operator to view the operation without a platform, saving space and cost. An open design provides easy access and simplifies cleanup. Hydraulic or pneumatic units are offered in a standard eight-roll model or a high-solids 15-roll model. 732/548-4400; www.chartermachine.com.

Evaporator

Driven by a 25 hp industrial-grade motor, the DriBoss DBE-750 evaporator from Dust Control Technology eliminates wastewater quickly and cost-efficiently without evaporation ponds. The high-speed head features stainless steel fan blades for optimal droplet distribution. Low plume height helps ensure short drift distances. The frame floats on polyethylene pontoons filled with closed-cell urethane foam so that even if a pontoon is punctured, it retains the buoyancy. A 7.5 hp submersible pump is attached. 309/693-8600; www.driboss.com.

Polyacrylamide flocculants

Flocculant Technologies from the BASF Corporation – Water Solutions Division are designed to suit an array of sludge and process conditions. Polyacrylamide flocculants deliver higher cake solids, reducing transportation and landfill costs, improving incineration efficiency and enhancing opportunities for beneficial reuse. 800/322-3885; www.watersolutions.basf.com.

Rotating screen

The Flo-Drum rotating screen from Enviro-Care features a double seal at the influent end of the screen basket that reduces bypass. An external spray and brush keep small solids contained in the basket. The basket is constructed of stainless steel perforated media that contains captured solids. There are three separate washing functions: System One washes organics from the screen, System Two cleans the screen basket, and System Three cleans the dewatering zone. 888/805-5794; www.enviro-care.com.

Decanter centrifuge

The Decanter Centrifuge from Noxon North America features a variable-frequency drive design that allows for fully electric drive packages with the same torque-generating characteristics as units that use hydraulic backdrives. The centrifuges can dewater a wide variety of sludges and slurries to higher solids concentrations and high-capture efficiency. 416/843-6500; www.noxon.com.

Rotary press

The completely enclosed design of the Fournier Industries Rotary Press eliminates the need for odor containment and can easily be expanded from one channel to six to accommodate future flow rates. Sludge is first dosed with a polymer and passed through a variable-speed flocculator to improve settleability. It then enters the circular dewatering channel that slowly rotates and uses backpressure to dewater sludge through fine mesh screens on either side of the channel. Dry cake exits the press and drops to a collection bin, or is conveyed away. After dewatering, the press goes through a 5-minute wash cycle once per day. Operation is largely automated. 418/423-4241; www.rotary-press.com.

Channel grinder

The Taskmaster Titan TM 14000 twin shaft channel grinder from Franklin Miller combines channel grinding with high flow capacity and low headloss without rotating screens. The grinder employs two counter-rotating shafts. One cutter stack intermeshes with a larger-diameter second shaft, allowing large, bulky or round objects to be finely ground to protect pumps, filter presses and other downstream equipment. The grinder is equipped with a 3 hp or 5 hp motor and cycloidal gear drive, cutter cartridge technology, and a 14- by 12-inch up to 14- by 60-inch inlet cutting chamber for flow rates up to 8 mgd. 973/535-9200; www.franklinmiller.com.

Hydraulic drive

The compact S3SHR 3-inch hydraulic drive submersible shredder pump from Hydra-Tech Pumps features an open-vane shredder impeller with tungsten carbide cutting tip. It continuously rips and shears solids with 360-degree shredding action. Its compact size allows for use in tight spaces. There are versions for portable or fixed installations; a guide rail assembly is available for stationary applications. A variable-speed hydraulic drive can be used when electric power is hazardous or impractical. 570/645-3779; www.hydra-tech.com.

Screenings compactor

The SLB Series screenings compactor from IPEC Consultants removes trash solids from primary effluent ahead of the biological process cells. The auger-style screen removes solids down to 500 microns, followed by washing and compacting. The unit consists of an auger with cleaning brushes attached along the rim, a fixed screen cylinder of perforated plate, a structured wedge wire element for extraction of pressate, an automatically operated cleaning shower, a solids discharge spout and a mechanical gear drive and motor. Influent is pumped to an inlet fitting, which directs flow to a screen cylinder. Solids are retained on the interior of the cylinder and are transported axially by the auger. Solids accumulate in the press zone cylinder, where a series of shower nozzles are directed to wash organic components during a compaction process. The final discharge solids exit in plug form to a disposal bin. Filtrate and wash water collects in the bottom of housing and drains to the downstream treatment process. 800/663-8409; www.ipec.ca.

Macerator grinder

The Sludge Monster Grinder from JWC Environmental produces three times the torque and five times the cutting force of high-speed macerators to ensure smooth, reliable grinding of any debris. Available for 4- and 6-inch sludge lines, it is built to protect sludge pumps, heat exchangers, centrifuges and other dewatering equipment from clogging with rags and debris. It uses an energy-efficient 2 hp motor, consuming 27 percent less energy than a typical high-speed macerator. The low-speed design ensures long service life and low life-cycle costs. 800/331-2277; www.jwce.com.

Dewatering press

The Rotary Fan Press from Prime Solution simplifies dewatering by using continuous pressure differential technology. Units offer semi-automated operation, self-cleaning, low maintenance, long service life, energy efficiency, portability, and a minimal footprint. It has few mechanical parts and a slow revolution. 269/694-6666; www.psirotary.com.

Rake bar screen

Kusters Water offers FSM/WasteTech multi-rake bar screens that can be used in many screening applications. The multiple-rake design features lubrication-free lower bearings, a rake "step-over" feature, and individually replaceable bars that provide reliable, low-maintenance operation. Screen spacing as small as 2 mm is available. Materials include 304 or 316 stainless steel for low maintenance and long life. 800/264-7005; www.kusterswater.com.

Screw press

With a wide range of dewatering features, the screw press from Schwing Bioset does not need to suspend operations for cleaning. Performance is the same from the smallest press to the largest. Dewatering results are similar to high-speed centrifuges but with lower energy and maintenance costs. The press is suitable for unattended operations. 715/247-3433; www.schwingbioset.com.

Screening system

The hydraulically operated telescoping boom and rake mechanism on the Hydronic T screening system from Lakeside Equipment cleans bar screens, trash racks and intake screens. Hydraulic cylinders pivot the boom and extend and retract the boom and rake. Single telescoping designs are typical, and multiple telescoping sections are available to expand reach. For indoor headworks systems with deep channels or low headroom, fine and coarse screening options are available. 630/837-5640; www.lakeside-equipment.com.

Lime and biosolids mixer

The compact MBV lime and sludge mixer from Sodimate features orientable paddle blades that allow efficient mixing of the lime and dewatered biosolids coming from dehydration systems. It has a stainless steel construction for harsh applications, and can be combined with conveyors, pumps and lime feed systems for effective stabilization. The MBV can mix 0.5 to 15 tons/hr of dewatered biosolids. 773/665-8800; www.sodimate-inc.com.

Thermal dryer

The BioCon Thermal Dryer from Kruger USA processes biosolids into marketable products. The dual-belt dryer is designed for safe and efficient operation, creating a Class A end product dried to at least 90 percent solids. The product can be enhanced with particle-sizing equipment. The product is then screened to meet the specific size requirements. Depending on facility size, a bagging station or silo system can be provided for handling the dried product. The silo includes a conveyance system to transfer biosolids into commercial trucks for shipment. 919/677-8310; www.krugerusa.com.

Dual belt press

The three-stage TRIAD BPRM dual belt press from Pro-Equipment includes final polymer mixing, rotary drum thickening, dual belt dewatering and complete controls in a single package. This system can achieve solids concentrations from 16 to 18 percent with affordable polymer costs. The press consists of a structural frame and panels to support rollers, bearings and other ancillary equipment while assuring structural integrity and minimal corrosion. 262/513-8801; www.proequipment.com.

Skid-mount dewatering system

The skid-mount dewatering system from PHOENIX Process Equipment provides biosolids dewatering capacities on conventional two-belt designs ranging from 300 to 3,000 pounds of dry solids per hour. The belt press, sludge pump, belt wash water booster pump, polymer system, compressor and master control panel are factory piped, wired and mounted onto a steel skid for plug-and-play startups. Three-belt designs use a two-stage gravity zone with an independent pre-thickening section mounted on top of the press. Skid-mounted systems with footprints as small as 4 x 15 feet are available. 502/499-6198; www.dewater.com.

Decanter centrifuge

DRYCAKE Decanter Centrifuge systems from Vanderbeken Enterprises separate the liquid from biosolids by centrifugal force. Heavier solids are conveyed along the bottom of the drum to the outlet chamber by an internal screw rotating at a slightly different speed. The liquid exits the opposite side, flowing over an adjustable weir. The centrifuges feature sectional split-case covers for ease of access, an independently driven solids scraper to prevent clogging by sticky cake, a zero-footprint hydraulic back drive for increased performance, and a high-speed DPC processor that reacts to biosolids conditions and delivers better dry cake. 877/379-2253; www.drycake.com.

Bagging system

The Longofill continuous bag system by PAXXO can connect to the discharge point of machines used to move, dewater or compact screenings and grit, which are then deposited in a continuous bag for odor containment and spillage control. The cassette is easy to seal, and the material and odors are trapped inside, reducing environmental and health issues and cutting down development of bacteria and fungus spores. 770/502-0055; www.paxxo.com.

Microbial stimulant

SUPER PHOS from Probiotic Solutions starts out as food grade white phosphoric acid (tech grade) pre-complexed with organic acids to maximize availability to aeration basin microbes. It improves plant performance by maximizing phosphorus bioavailability with minimum P input. The product uses the company's Micro Carbon Technology as its base ingredient for maximum microbial stimulation in wastewater to increase treatment efficiency by reducing biosolids quicker, improving settleability, and raising dissolved oxygen levels. 800/961-1220; www.probiotic.com.

Tanks and clarifiers

The ZICKERT Shark from WesTech Engineering offers rectangular tanks and lamella plate clarifiers based on the forward and return movement of hydrodynamically designed rake sections. The concave faces of the sections transport the sediment toward a sludge pit. During return movement, the wedge-shaped parts of the sections slide under the sludge blanket, providing continuous and unidirectional transport of the sludge. The robust and simple design has few moving parts, can be powered by hydraulic or electric motors and provides the same results whether it is pulled or pushed. It is also easy to install and maintain, offering complete sludge transport without dead zones or turbulence. 801/265-1000; www.westech-inc.com.

Fine screen

The block design of the MC Fine Screen from Schreiber consists of two elements­ — straight or hook — that are interchangeable. It is a deep-channel traveling-band fine screen with depths up to 50 feet and widths up to 14 feet, including slot spacing to 1 mm. The screen is easy to maintain without dewatering due to the block design and absence of underwater moving parts. Filter elements are mounted on two stainless steel support shafts, with end caps making up separate blocks. Units can be custom configured and are completely assembled and bolted into place. The blocks can be removed in three easy steps for inspection and maintenance. 205/655-7466; www.schreiberwater.com.



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