Sludge, Handling, Processing

In 2011, Synagro will dredge and dewater solids from nearly 50 lagoons, finding beneficial uses for the majority ...

Pennwell web 180 124

Dredging, lagoon cleaningPennwell web 180 124

In 2011, Synagro will dredge and dewater solids from nearly 50 lagoons, finding beneficial uses for the majority of the processed material. The company owns and operates a fleet of mobile dredges, pumps, high flotation dozers, hydraulic excavators, belt filter presses and centrifuges. The company leverages its technologies, experience and professional staff to complete lagoon dredging projects with the highest attention to regulatory compliance and safety. Synagro Technologies Inc., www.synagro.com

Sludge blanket interfacePennwell web 170 111

The ECHO “Sludge Hunter” is a sludge blanket level detector used in primary and secondary clarifiers and thickeners. It can monitor the interface in difficult applications with its advanced “solids algorithm” used to remove all interference caused by floating particles and electrical noise. It comes standard with an isolated 4-20mA output and 4 SPDT relays. The unique air purge transducer automatically cleans itself every 15 minutes. ECHO Process Instrumentation Inc., www.echopi.com

DAF systemsPennwell web 100 133

Hi-Tech offers a line of rectangular and circular Dissolved Air Flotation units for use in solids collection and sludge thickening. Each DAF mechanism is equipped with the necessary pressurization and recycle components required for efficient separation and collection of solids. Hi-Tech Environmental Inc., www.hi-techenv.com

AODD pumpsPennwell web 150 150

Almatec’s AH Series High-Pressure AODD Pumps have a number of characteristic advantages when feeding filter presses with chemical wastes and special sludges. The pumps have no drives, no rotating parts and no rotary shaft seals. The pumps also offer dry-run capability, good controllability and a gasketless mechanical design, which makes operating against a closed discharge possible. A compressible drive medium permits gentle product delivery with attenuated pressure peaks. The plastic AH pumps are available in three sizes, based on their maximum delivery volume: AH 15 (70 lpm/18.5 gpm), AH 25 (180 lpm/48 gpm) and AH 40 (330 lpm/87 gpm). Almatec®, www.pumpsg.com

Wastewater pumps

KSB, a supplier of wastewater pumps, has released the versatile Amarex N pump to the U.S. market. The pumps are available in eight models to fit a variety of applications, such as wastewater transport, fluids containing long fibers and solid substances, fluids containing gas/air, raw, activated or digested sludge, or drainage of rooms subjected to a flooding risk in industrial and commercial premises. KSB Inc., www.ksbusa.comPennwell web 80 164

Sludge grinders

JWC Environmental has introduced its new Sludge Monster® grinder – built to protect sludge pumps, heat exchangers, centrifuges and other dewatering equipment from clogging with rags and debris. The in-line system uses the same low speed, high-torque design as the bigger Muffin Monster®, but in a compact and economical package. The grinder produces three times the torque and five times the cutting force of high-speed macerators. A 2-hp motor generates all the torque needed to shred rag balls and trash into small particles. JWC Environmental,www.jwce.com

Double diaphragm pumpsPennwell web 160 124

Wilden® has designed its Stallion® Series of Metal Air-Operated Double Diaphragm (AODD) Pumps with the transfer of solid-laden slurries in mind. The pumps incorporate design concepts that make the handling and transfer of fluids with a high solid content more efficient and effective. Chief among these are a shock-absorbing polyurethane screen base that absorbs the impact from constant assault by solid particles, resulting in increased durability. The pumps are available in three sizes: PX4, 1-1/2”; PX8, 2” and PX15, 3”. All are available in either aluminum or ductile iron materials of construction, are submersible, intrinsically safe, lube-free, can run dry, have superior anti-freezing properties and can handle pressures to 125 psi. Wilden, www.wildenpump.com

Sludge stabilizationPennwell web 170 100

Sodimate offers a lime sludge stabilization system. Sludge processed through any dewatering system (centrifuge, belt press, etc.) is collected and conveyed into a lime sludge mixer. The sludge mixer is composed of two dual shredding paddle screws. Each paddle is adjustable according to the sludge uniformity and dry solids contents. The blades and mixer casings are made of special alloy steel that resists the exothermic reaction created by the mixture of lime and sludge. Sodimate Inc.,www.sodimate-inc.comPennwell web 100 112

Suspended solids monitoring

MJK’s Susix® Monitor continuously measures suspended solids with +/-3% correlation to laboratory tests. It is ideal for sludge thickening, clarifier and sludge recirculation applications to optimize system performance and lower energy costs.MJK, www.mjk.com

Sludge scraperPennwell web 180 95

The Zickert Shark™ Sludge Scraper, available from WesTech, provides an innovative solution for sludge scraping in rectangular tanks and Lamella plate clarifiers. The system is based on the forward and return movement of dynamically designed sections. The concave faces of the sections transport the sediment toward a sludge pit. During the return movement, the wedge-shaped parts of the sections slide under the sludge blanket, providing continuous and uninterrupted transport of the sludge. WesTech Engineering, www.westech-inc.com

Storage tanksPennwell web 200 120

Modular storage tanks for sludge processing are available from ModuTank for rent or purchase. They feature per-gallon costs below those of conventional aboveground liquid storage systems of comparable volume. Handling from 2000 to a million gallons and above, these modular facilities are bolted together from galvanized panels for free-standing or anchored installation. A full range of membrane liners assures compatibility with most applications. Optional fittings for piping, as well as floating covers, can be specified. Typically, a one-million gallon sludge tank can be assembled in approximately three days by eight workers using ordinary hand tools. These modular systems can also be customized in any unique size or rectangular shape configured for unusual sites. ModuTank Inc.,www.modutank.com

Dewatering filter pressesPennwell web 170 92

ErtelAlsop is a US Based filter press manufacturer. Its EA-Series filter presses are supplied with lightweight polypropylene plates and are sized from 102 mm to 1500 mm with press capacities ranging from 1 ft3 to over 350 ft3. The presses include fast acting hydraulic systems, uniform fill manifolds, safety lanyards, reverse core blow capabilities, and a wide range of options including a variety of construction materials and coatings, wash capabilities, and PLC controlled automation for drip trays, plate shifting, cloth washing, and many other features. ErtelAlsop, www.ertelalsop.comPennwell web 120 153

Cake Pump

The seepex BTH cake pump design allows flow rates up to 220 gpm at pressures up to 540 psi. An auger pushes the cake into the pumping element. The pitch, diameter and speed of the auger can be adjusted to match the application. A customizable open hopper along with controls for dry running protection, load cell sensors, pressure gauge and boundary layer injection completes the system. The system has low capital, operating and maintenance costs and does not pulsate. Seepex Inc., www.seepex.com

Sludge pumping

The Moyno® 2000 HS System features an integral hopper with a twin-screw auger feeder and speciallyPennwell web 200 73 designed progressing cavity pump that handles high solids, dewatered municipal sludge to over 50 percent solids. The system can pump filter cake further distances with higher volumetric efficiencies than many other progressing cavity pumps. Its twin-screw feeder supplies a constant, pressurized feed rate to the pump resulting in a 100 percent pump cavity fill rate. It is an alternative to piston pumps and conveyors for dewatered sludge transfer. Moyno Inc.,www.moyno.com

Sludge dewateringPennwell web 150 123

BDP Industries is a supplier of sludge dewatering equipment. The company began designing and fabricating equipment over 35 years ago. The company has more than 1,000 operating belt presses throughout the world. The company’s products include gravity belt thickeners, belt presses, rotary drum concentrators, lime stabilization systems, and mobile dewatering equipment. BDP Industries, www.bdpindustries.com

Rotary fan pressPennwell web 190 157

The Rotary Fan Press from Prime Solution uses continuous pressure and a rotational speed of less than 1 rpm to dewater sludge and slurries. The system is enclosed, automated, low maintenance, has a long service life and is energy efficient. It is also portable and expandable. Several capacities are available to meet flow applications of all sizes. The compact design simplifies installation. Skid mounted systems include a central operator control panel, feed pump, chemical prep, inline mixing and the availability of plant integrated controls as standard. Mobile systems can be containerized or trailer mounted. Prime Solution Inc., www.psirotary.com

Screening, grindingPennwell web 75 144

The Dimminutor® Turbo model from Franklin Miller provides automatic screening and grinding of wastewater solids in straight-through channels and wet wells. The system reduces plastics, wood, rags and other solids to fine bits, enhancing plant operation and improving the reliability of pumps and other downstream equipment. It employs a smooth, continuously rotating design with high torque. As its three bidirectional rotary cutters intermesh at close clearance with stationary cutters, solids are reduced to a size small enough to pass through a new ultra-precision sizing screen. With no gaps or openings between the screen and cutters, output is controlled and complete reduction assured. Franklin Miller Inc., www.franklinmiller.com

Sludge reductionPennwell web 120 132

BioSpikes™ 4000, available from Novozymes Biologicals, offers a new way to minimize settled sludge volume and reduce solids handling costs in wastewater lagoons. The product contains microorganisms, powerful enzymes, and essential micronutrients and is made via a process that creates a dense spike that rapidly sinks to the bottom of a lagoon, even when applied at the water’s surface. This simplifies dosing and ensures contact between the microorganisms and the sludge layer. The combination of microorganisms, enzymes and micronutrients ensures rapid stimulation of biological activity and reduction of the sludge layer. Novozymes Biologicals Inc.,www.biospikes.novozymes.com

Screw pressPennwell web 130 97

The Huber RoS3Q Inclined Screw Press is designed for dewatering municipal and industrial sludge and biosolids. With its slow rotating auger the press can handle the toughest sludge. The system offers fully automatic operation, and can quietly run unattended 24 hours a day, seven days a week. Huber Technology,www.huberforum.net

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