Long-lasting pipe

Basalt lined piping from Abresist Kalenborn lasts five times longer than 1/2-inch wall cast iron. Pipes, elbows and fittings are custom engineered for each application and can be provided in a variety of end connection arrangements to easily retrofit into existing systems or install in new ones using flanges, grooved couplings, compression couplings or welded attachment. Most coating systems can be applied to the carbon steel outer casing. The piping is well-designed for abrasive slurry systems and pneumatic systems in pressure or vacuum conditions. 800/348-0717; www.abresist.com.

 

Belt filter press

The KLAMPRESS belt filter press from Ashbrook Simon-Hartley achieves specific dewatering goals and can be provided as an extended belt press, as a three-belt press with gravity belt thickener, as an extended high-solids belt press, as a vertical Z-Type belt press with horizontal gravity belt thickener, and as other configurations. It offers low cost of ownership and trouble-free operation. 800/547-7273; www.as-h.com.

Related: Headworks and Biosolids

 

Full penetration bar screen

The FlexRake FPFS from Duperon for wastewater installations uses Thru-Bar technology, ensuring that scrapers fully penetrate the bars and eliminate the issues of wrapping and clinging debris. Multiple scrapers discharge once per minute, further minimizing debris accumulation.

The manufacturer says the unit’s configuration of custom tear-shaped bars provides a 50 percent screening efficiency advantage over rectangular and circular-shaped bars (based on 0.25-inch bar openings). This delivers improved flow, reduced slot velocity and decreased headloss. Controlled by fractional horsepower, it runs on 0.25 hp. Hourly, this expends 0.186 kWh, with an average cost of $1.75/hour. 800/383-8479; www.duperon.com.

Related: Energy Management and Renewable Resources

 

Grit removal system

Full Circle vortex grit systems from Envirodyne Systems are 360-degree designs using the Hercules drive, which allows for inline entry and exit. All parts are designed for long service. The systems offer low headloss, coarse to fine grit removal, custom designs for all applications, no submerged parts, removal of grit with low organic content and designs to accommodate varying flows.

Laminar flows are introduced tangentially into the grit chamber and are directed along the outside of the tank by an inlet baffle into a rotational current. A mechanized impeller forces a vortex, creating a shear zone that separates lighter organics from heavier grit. An outlet is provided inline, but at a higher elevation to prevent short-circuiting. Grit collects towards the center of the tank, where it settles into a lower grit storage hopper. Water and air scour lines or mechanical means can be supplied to fluidize the grit. A variety of grit pumping options are available, including airlift, vacuum-primed and self-priming. 717/763-0500; www.envirodynesystems.com.

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Polymer blending

The L4-D dynaBLEND liquid polymer blending system from Fluid Dynamics is lightweight and available in three sizes: L4-300, L4-600, L4-1200. Five diaphragm pump models are available (0.4D, 1.0D, 2.5D, 4.5D, 8.0D) with polymer flow rate ranges from 0.02 to 8.0 gph. The L4-600 2.5D model fits polymer blending applications with 60-600 gph of dilution water and 0.1-2.5 gph of polymer. The unit requires a water supply able to provide a maximum pressure of 35-50 psi greater than the water pressure at the point of use. All L4 and L6 models can handle operating pressures to 100 psi and run on single-phase 115 VAC standard power. 215/699-8700; www.dynablend.com.

 

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Inline disintegrator

The Super Shredder inline disintegrator from Franklin Miller reduces tough solids directly in sludge or raw sewage lines. The unit combines grinding capabilities with streamlined features. The design provides a large open area to fluid flow for applications requiring a heavy-duty size reduction processor that can handle high flows with minimal headloss. The unit stops pumps and valves from ragging and plugging, protects filter presses from punctures and incomplete dewatering, and enhances and protects centrifuge operation.

The device features a spherical shredding mechanism that cuts and shears sludge and sewage solids into fine bits. The hard-faced stainless steel cutters resist wear. With two replaceable one-piece cutters and fewer moving parts, less maintenance is required than with banks of cutter disks. An S-250 auto-reversing control system that senses jam conditions is included. 800/932-0599; www.franklinmiller.com.

 

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Biosolids hauler

The BlackBelt live-bottom trailer from Henderson Products hauls processed sludge to its final staging area. The weight of the material creates a seal inside the unit during transport. The corrosion-resistant, stainless steel unit is 100 percent cab-controlled for safety. With the load sense tensioning drive system, the conveyor belt discharges the biosolids out the rear. Planetary drive provides 71 percent roller to belt engagement, eliminating belt slippage and guaranteeing a smooth discharge. Because there is no tipping, exact material placement is achieved, reducing airborne particles generated during unloading. 800/359-4970; www.hendersonproducts.com.

 

Modular headworks plants

A full line of modular headworks plants from Hi-Tech Environmental treats flows from 150 to 2,300 gpm. Major components are constructed from 304 or 316 stainless steel for long life. Every modular plant features screening, grit removal and optional grease removal along with a PLC control system for fully automated operation and minimal operator attention. Outdoor weather protection is available for colder climates. Every system comes in a self-contained stainless steel tank with flanged inlet and outlet. 800/264-7005; www.hi-techenv.com.

 

Sludge screen

The Hydro-Sludge screen from Hydro International is a durable pressurized screen that separates material from sludge and dewaters screened materials for landfill in one operation. The horizontal, inline coarse material separator has an inlet screening zone and a pressing (compaction) zone. The enclosed system reduces odors and has no washwater requirements. Sludge passes through the perforated stainless steel screen while material larger than 5 mm is captured and conveyed to the compaction zone.

Coarse materials are compacted in the regulating cone, and screenings are discharged for disposal. The unit can be used for pumped feed or on direct discharge from a septage truck and can be used in primary, secondary or combined sludges. It is fully automatic for continuous or intermittent screening. 866/615-8130; www.hydro-international.biz.

 

Drum thickeners

IFT rotary drum sludge thickeners from IPEC consist of a cylindrical drum with progressive series of screen elements. The drum rotates on four wheels mounted on a structural housing. The smallest openings are used to screen the influent, followed by coarser elements as the material thickens. The screens are used to remove free liquids from a variety of sludges, including those with microbial particles. Sludge contains 0.5 to 3 percent solids and can be thickened to 3 to 15 percent.

Sludge is pumped to the thickener where polymer is injected before the material enters a tank. A vertically mounted mechanical mixer agitates for up to one minute to aggregate the fine solids into a tightly held floc. The conditioned sludge flows into the distribution headbox and is fed into a screen cylinder. The floc are retained on the screen surface as the liquid flows through the screen opening. Liquid filtrate is collected and directed to a bottom outlet. Solids are transported by flights along the cylinder and discharged out the open end, exiting through the discharge chute. A shower bar along the top section applies an intermittent cleaning shower to keep screen openings clean. 800/663-8409; www.ipec.ca.

 

Automated biosolids press

The Dehydris Twist biosolids press from Infilco Degremont uses the Bucher Unipektin hydraulic piston press technology. The automated process consists of a rotating cylinder and moving piston that continuously squeezes the material, allowing the water to pass through flexible drainage elements made of porous woven cloth. The resulting cake is retained inside the cylindrical shell and automatically discharged. The unit provides up to 30 percent reduction in bulk volume. Digested biosolids can be dewatered to autothermal conditions before incineration. Maximum dry substance content is achieved for chemically untreated and denatured material. 804/756-7600; www.degremont-technologies.com.

 

Low-maintenance classifier

The grit classifier from JDV Equipment Corp. is a low-maintenance system with high-efficiency features to handle flows up to 800 gpm. The system traps small, inorganic materials such as sand, silt, gravel, ashes and coffee grounds and delivers them dewatered to the solids discharge for disposal. The optional hydro cyclone increases the overall capacity by reducing the amount of water flowing to the classifier and diverting excess water to plant flows, but passing the grit through to the classifier. 937/366-6556; www.jdvequipment.com.

 

Filter presses

Filter presses from Johnson Screens produce filter cake with a solids content up to 75 percent. They come in five configurations: sidebar, overhead I-beam, membrane, high-speed and mobile. The presses are available with capacities from 0.4 to 670 cubic feet, with plate sizes from 320 by 320 mm to 2,000 by 2,000 mm and with multiple cake thicknesses. The user can choose the level of automation.

The units are available with 100 or 225 psi feed pressure ratings; stainless steel sidebar caps fitted standard; polypropylene filter plates, both gasketed and non-gasketed; electric/hydraulic and air/hydraulic operating systems integrated into the press frame; and technical support. Options include automatic plate shifters; air blowdown and cake washing configurations; filtrate leakage collectors; automatic washing systems; PLC automation packages with HMI interface, SCADA monitoring and data logging capabilities; automated pump controls; light curtains and safety shut-off alarms; and sludge hoppers, screw augers and conveying systems. 800/833-9473; www.johnsonscreens.com.

 

Sludge grinder

The Sludge Monster grinder from JWC Environmental protects sludge pumps, heat exchangers, centrifuges and other dewatering equipment from clogging with rags and debris. The inline unit uses the same low-speed, high-torque design as the Muffin Monster, but in a compact package. The energy-efficient grinder includes a 2 hp motor, improved solids reduction using 11- or 13-tooth alloy steel cutters, hardness of Rockwell 60-65, top and bottom shaft supports to prevent shaft deflection, and automatic reversals. There is no cleanout trap to maintain, and the unit can be designed and built for a 4-inch flange specification. The grinder processes 274 gpm and can also be used in scum line applications. 800/331-2277; www.jwce.com.

 

Thermal hydrolysis

The EXELYS thermal hydrolysis system from Kruger USA, used with Kruger’s DLD (digestion-lysis-digestion) configuration, optimizes energy production and solids reduction. DLD is the combination of double digestions separated by EXELYS. Sludge is fed to the first digester, which can operate in a mesophilic or thermophilic state. The material is then dewatered and fed to the EXELYS system. The heat is recovered for steam generation and heating of the first digester. The hydrolyzed sludge is then digested again in the second mesophilic digester. All of the solids solubilized in the unit are converted to biogas. 919/677-8310; www.krugerusa.com.

 

All-in-one plant

The Raptor septage acceptance plant and Raptor septage complete plant from Lakeside Equipment Corp. remove debris and inorganic solids from municipal, industrial and septic tank sludges. The heavy-duty machines incorporate the Raptor fine screen for screening, dewatering and compaction. Accessories include grit and rock removal and security access and automated accounting systems. With the addition of aerated grit removal, the acceptance plant is offered as the complete plant. 630/837-5640; www.lakeside-equipment.com.

 

Pump technology

Smart Conveying Technology (SCT) from seepex provides fast pump maintenance, assembly and dismantling. Progressive-cavity pumps with SCT do not have to be removed for maintenance, and there is no dismantling and reassembly of piping or removal of other components. The integrated retensioning device and a readjustment of the stator increases the service life of the stator and rotor. 937/864-7150; www.seepex.com.

 

Sludge meter

The Model 602 sludge depth meter from Markland Specialty Engineering measures sludge levels in DAFs, SBRs, inclined plate clarifiers, decanting tanks and clarifiers. The meter has four power levels to adjust for different concentrations of sludge. It also can be used to find the level of any interface in a liquid. The optical beam means sludge can be located in obstructed or constricted areas not suitable for other meters. The PVC probe is corrosion resistant. Analog, digital and relay outputs are available. 905/873-7791; www.sludgecontrols.com.

 

Grinder system

The M-Ovas Grinder System from NETZSCH Pumps protects downstream pumps, pipelines, belt presses, centrifuges and digesters from blockages. The single shaft design cuts and conditions debris-laden fluids into a homogenous sludge. Other debris like stones and metal parts fall out of suspension and accumulate in an integrated stone trap, making it easy to access and dispose of settled matter.

The compact design allows high flow rates with low energy consumption. The grinder allows for maintenance in place without disconnecting any piping. The quick-release hinged lid gives access to the cutting blades and plates. The cutting blades are simple to change, and the cutter plate is reversible. A variety of cutter plates and control panels are available. 610/363-8010; www.netzschusa.com.

 

Compact fan press

The Rotary Fan Press from Prime Solution simplifies dewatering performance for sludges and slurries using continuous pressure differential technology. With a rotational speed of less than 1 rpm, the unit is portable and enclosed and offers a long service life. Several capacities are available to meet various flow applications. Skid-mounted systems include control panel, feed pump, chemical prep, inline mixing and plant integrated controls. The compact designs can be configured for portability with mobile systems containerized or trailer mounted. 269/673-9559; www.psirotary.com.

 

Grit slurry treatment

The Grit Classifier from Schreiber washes and dewaters grit slurry from grit removal systems, enabling easy handling and transfer for disposal. It is effective over a wide range of grit particle sizes. The slurry is transferred to the grit classifier, where the inlet flow is directed downward. The grit settles into the bottom of the hopper. A shaftless screw rotates, lifting the grit from the bottom of the hopper up the trough, further washing and dewatering the grit.

The decanted water flows over a weir and returns to the waste stream, and the dewatered grit is discharged into a container. The system is fully enclosed and is made of 304 stainless steel for long life and corrosion protection. A hardened steel shaftless screw provides durability and requires no submerged bearing. The device is available in 12-inch diameter for flows up to 150 gpm, and 20-inch diameter for flows up to 300 gpm. 205/655-7466; www.schreiberwater.com.

 

Lime/sludge mixer

The MBV lime/sludge mixer from Sodimate has orientable blades that allow efficient mixing of the lime and dewatered sludge coming from dehydration systems. The small unit eases maintenance when paddle blades need to be replaced. It is possible to combine the mixer with sludge conveyors, sludge pumps and lime feed systems for biosolids stabilization (Class B).

Stainless steel construction makes it versatile for harsh applications. It comes in different sizes and mixes from 0.5 to 15 tons/hr of material. The mixer can also be mounted into trailers for remote treatment areas and used for demonstrations and trials. The resulting product is a homogenized and stabilized biosolids with up to 30 percent solids, convenient for transport, storage, landfill or use as fertilizer. 773/665-8800; www.sodimate-inc.com.

 

Tubular drag conveyors

DYNAFLOW tubular chain drag conveyors from Spiroflow Systems are designed for heavy-duty conveying. The mechanical drag conveyor-type system operates in the confines of a pipe. Heavy-duty disks connected by articulated metal links or chains move material. The durable discs are made from steel or cast iron to withstand extremely hot conditions.

The conveyors offer totally enclosed, dust and contamination-free handling and self-feeding with most flowable materials. They require minimum horsepower and energy consumption. The units permit complex circuits, operate in two or more planes, and can have multiple feed and discharge points within a circuit without the need for a baghouse. They provide gentle conveying action, do not separate blended material and minimize material buildup. 704/291-9595; www.spiroflow systems.com.

 

Wastewater screening

The CleanFlo Monoscreen from WesTech Engineering provides high-efficiency wastewater screening with a durable drive system that uses few moving parts with no chains or submerged bearings. The low-profile design allows easy access and inspection. The unit uses a progressive step shape and motion that minimizes flow surges during operation and evenly distributes the screenings on the face of the unit. The result is a screenings capture ratio (SCR) of 82.5 percent.

Combined with the optional CleanWash SWP/CPS for dewatering, the machine maximizes screenings capture while minimizing screenings volume for disposal. The improved solids washing reduces odor generation, and the high-efficiency internal counterpressure screw produces lighter, drier screenings. 801/265-1000; www.westech-inc.com.


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