Selected Products for Screenings Removal & Grinding


Finescreens typically have screen material openings < 0.25" and produce and provide high capture rate of wastewater solids. Use of finescreens generally produce an increase in screenings volume that must be considered when determining cost of screenings transportation and disposal. Many plants consider the use of an efficient screenings washer/compactor to minimize this added expense. Finescreens may incorporate a continuous band of stainless steel or UHMW panels. Finescreens are excellent for removing small wastewater solids typically missed by bar screens such as rags, cigarette butts, latex, plastics and other small debris.


Bandscreens use rotating panels that are positioned parallel to the flow and as wastewater enters the screen it flows left or right through the perforated screening panels. This helps eliminate bypass since only the inner loop of the screen touches screenings. Panels available with 5/64", 1/8", or 1/4" (2, 3 or 6mm) openings. The heavy-duty stainless steel roller chain passes around a UHMW guide track to eliminate the need for sprockets or bearings in the flow.


Drumscreens are an internally fed fine screen ideal for removal of small debris using woven wire mesh panels. With the 0.25" (2mm) openings, this fine screen removes all unwanted material from the flow. When used in a MBR application the external spray system washes soft organics back into the waste stream for biodegradation in the membrane bioreactor. This process greatly reduces solids loading and fouling of the MBR.

Chain & Rake

A Chain and Rake screen is typically designed to provide quick removal of large slugs of material in order to protect downstream processes. Chain and Rake screens are also used in storm overflow application where large concentrations of debris are expected. A series of replaceable rakes are bolted to two bands of matched endless chain.

Modular Headworks Systems

Modular Headworks Systems combine three technologies - a grinder, a fine screen and a compactor. This integrated system removes trash and unwanted solids. Solids are captured by a perforated plate screen and removed by a rotating auger. As solids are removed, wash zones clean off fecal material. The rotating auger then conveys solids to the discharge chute where the integrated compacter squeezes out water before depositing the cleaned and dried material into a dumpster. A well designed headworks system provides a small footprint and a single point of responsibility for performance, start-up and training.

Channel Grinder

A Channel Grinder system accommodates high-flows while shredding solids (such as rags, trash, rocks and wood) into particles that flow harmlessly through pumps, pipes and processes. Screening drums direct solids into the cutters and are made of 1/2" (12mm) stainless steel coil.

Grease Receiving Station

FOG systems are integrated solutions that process and condition Fats, Oil and Grease (FOG) prior to anaerobic digestion. Addition of FOG to the digestion process can have a profound and positive effect on methane gas yield, allowing for greater energy production from new or existing engines or micro-turbines or other electricity producing devices. Integrated systems typically include an insulated collection tank, flow meter, screenings removal mechanism, piping and controls. Card Readers and billing or payment systems with “swipe cards” are available.