Sludge Handling, Processing

Sept. 1, 2010
The CQ Centrifuge from Ashbrook Simon-Hartley is engineered to minimize polymer and energy usage.

The CQ Centrifuge from Ashbrook Simon-Hartley is engineered to minimize polymer and energy usage. The centrifuge incorporates a field-replaceable polyurethane feed chamber equipped with integral accelerator bars. Its dual angle bowl design minimizes wear on scroll flights. Bowl parts and scroll flights are duplex stainless steel. Ashbrook Simon-Hartley, Houston, TX, 800-362-9041,

Rotary drum screen

Vulcan Industries has added new filtering media choices to its Rotary Drum Screen to protect downstream processes from fibrous materials. Potential uses include membrane bioreactors (MBR), integrated fixed film activated sludge (IFAS), moving bed bioreactors (MBBR) or other applications where stringy or fibrous material impact process efficiency. Vulcan Industries, Missouri Valley, IA, 712-642-2755,

Anaerobic digestion system

Infilco Degremont's 2PAD is a two-phase anaerobic digestion system designed to enhance digestion processes and to satisfy Class A biosolids requirements in accordance with EPA's 40 CFR Part 503 regulations. Two key sequential phases take place in anaerobic digestion, the acidogenesis and methanogenesis phases. Unlike conventional anaerobic digestion where the two phases occur in the same tank, these phases occur in separate digesters in the 2PAD system. The process is operated in a semi-batch, draw and fill mode, which ensures untreated sludge never discharges from the process. The process relies on Infilco Degremont's Cannon Mixer® System for its mixing, ensuring the active digestion volume is greater than 90 percent. Infilco Degremont Inc., Richmond, VA, 804-756-7600,

Sludge pumping

The Moyno® 2000 HS System features an integral hopper with a twin-screw auger feeder and specially 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., Springfield, OH, 877-486-6966,

Sludge dewatering

BDP Industries is a supplier of Sludge Dewatering Equipment. The company began designing and fabricating equipment over 35 years ago. Presently the company has over 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, Greenwich, NY, 518-527-5417,

Solids handling pumps
The Fairbanks Morse non-clog pump is designed to handle raw sewage, sludge and slurries. The design versatility allows the pump to fit in numerous piping configurations. These pumps feature the original non-clog radial impeller design with well-rounded leading vanes tapered toward the trailing edge to guide trash flow away from the vanes and into the circular flow channels of the impeller and casing. Fairbanks Morse Pump, Kansas City, KS, 913-371-5000, www.fmpump.comRotary fan press

Prime Solution offers the Prime Rotary Fan Press, a dewatering technology meeting the needs of small to midsize wastewater treatment facilities. With a footprint as small as 22 square feet, the press produces high cake solids for a range of applications. Typical results range from 18-26% for anaerobically digested biosolids, 15-20% for aerobically digested biosolids and 20-32% for mixed primary and secondary sludges. Suitable for system integration, the press is a fully enclosed turnkey system that can operate 24/7 with minimal supervision. A touch screen panel controls automated operations such as startup and shutdown. Prime Solution Inc., 269-673-9559,

Biosolids treatment

BCR Environmental offers the Neutralizer® for Class AA/EQ biosolids treatment, CleanB™ for Class B biosolids treatment, and Cleanstream™ for effluent treatment. The Neutralizer® treats municipal sludge to a Class AA (commercial grade fertilizer) residual in less than eight hours without digestion. CleanB™ produces Class B residuals in minutes through a simple chemical process without digestion thereby reducing operating time and cost. Cleanstream™ achieves high level disinfection without the safety and disinfection byproduct concerns of chlorine. BCR Environmental, Jacksonville, FL, 904-819-9170,

Screw press

The Huber Technology RoS3Q Inclined Screw Press has changed the current market perception of slow rotational dewatering technologies. It is especially suited to handle thin biological sludge, producing high cake solids without compromise of the capture rate. The system can help reduce chemical, electrical, operations and sludge disposal costs. Huber Technology Inc., Huntersville, NC, 704-949-1002,

Drying systems

Komline-Sanderson offers complete biosolids drying systems capable of handling in excess of 1,000 tons of wet cake per day. Dryers are designed to use steam or thermal fluid with heat supplied from the combustion of natural gas, digester gas, landfill gas, or fuel oil. Excess heat from combustion engines or turbines can also be used to heat thermal fluid or produce steam. The dryer's shaft, hollow paddles, and trough are all heated. The robust design, low speed with minimal rotating parts results in reduced maintenance costs. Indirect drying using the airtight dryer results in minimal off-gas volume which allows simplified odor control systems and safe operation. Komline-Sanderson, Peapack, NJ, 800-225-5457,

Anaerobic gas storage

The Dystor® gas holder from Siemens can be used on primary and secondary digesters. This manufacturer-installed, dual membrane system is able to use the entire water depth for solids storage, as well as operate at variable operating pressures. Its dome shape maximizes gas storage and membranes are sealed to the top of the wall so odors can't escape. The system can hold up to three times as much digester gas as a conventional steel cover. Siemens Water Technologies, Waukesha, WI, 800-524-6324

Sludge reduction system

The Fluidyne ISAM™ (Integrated Surge Anoxic Mix) sludge reduction system incorporates a constant level anaerobic basin, followed by a surge/anoxic/mix tank, and an aeration basin that incorporates BOD, TSS and nitrogen removal along with sludge reduction (as much as 85% compared to conventional activated sludge processes) in an integrated system. Wastewater enters a covered anaerobic reactor for pretreatment, sludge thickening and sludge destruction. Fluidyne Corp., Cedar Falls, IA, 319-266-9967,

Sludge pump

The Double Disc™ pump from Penn Valley incorporates a repair-in-place hinged housing design that allows complete servicing without disturbing the piping. With flow rates ranging from 1-1,400 gpm, the pump is routinely used for sludge handling applications to include: belt press feed, centrifuge feed, rotary press feed, thickener feed, thickened sludge, digested sludge, primary sludge, scum and septage. The pump is self-priming and able to handle high suction lifts. It can run dry without risk of damage. Penn Valley Pump Co., Warrington, PA, 215-343-8750,

Sludge dredge

The SRS Crisafulli remote control Flump dredge is designed to remove settled wastes and other by-products from settling ponds or lagoons. It is equipped with discharge pumps in sizes 3", 4", 6", and 8". The integrated system is comprised of major standard and optional components - i.e., flotation system, primary and secondary motors, hydraulic and electrical systems, cutterhead, pump, ladder, manual or programmable computerized controls, cabled traverse system, and Crisafulli Integral Floating Discharge System. Four models are offered with standard dredging depths to 12 feet. Custom depths to 30 feet. SRS Crisafulli, 800-442-7867,

Sludge mixer

The Sodimate MBV paddle sludge mixer is the smallest sludge mixer on the market. Its unique conception and efficiency comes from its orientable paddle blades that allow intimate mixing of lime and dewatered sludge. It also eases maintenance when paddle blades need to be replaced. The mixer can mix from 0.5 to 15 tons/hr of dewatered sludge.Sodimate Inc., Chicago, IL, 773-665-8800,

Non-contacting flow meter

The new DFM 5.0 Doppler Flow Meter from Greyline Instruments measures flow from outside a pipe. The clamp-on ultrasonic sensor mounts on any pipe ½" ID or larger. The meter is designed for "difficult" liquids like wastewater, sludge, slurries, abrasives or any liquid with bubbles or suspended solids. Calibration and start-up is simple with the built-in 5-button keypad. Standard features include a backlit display and totalizer, isolated 4-20 mA output and two control relays. Options include a built-in data logger and reporting system with USB output, Windows software and intrinsically safe sensor. Greyline Instruments Inc., Massena, NY, 888-473-9546,

Hose pump

Watson-Marlow has introduced the new SPX100D hose pump for challenging sludge applications. Using no valves, seals or rotors in the product stream, the pump can run dry and handle high grit or air entrained sludge. With flows up to 400 gpm, the pump is ideal for scum, thickener underflow, belt press or centrifuge feed. The hose is self-loading and can be replaced where the pump sits. There is no drive realignment or off-site rebuilding of the pump required. Advanced hose technology enables the SPX to pump corrosives, abrasives, shear sensitive fluids, high viscosity fluids, high density fluids, large solids and long stringy materials. Both pump rotors are always fully and centrally supported by their own high strength bearings. Unlike other pump types, the highly abrasive materials do not affect pump life. Watson-Marlow Pumps Group, 800-282-8823,

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