The Dover Township Sewer Authority (DTSA) Wastewater Treatment Plant in Dover, PA, is an 8.0 MGD plant that processes sewage from Dover Township and surrounding municipalities.  In addition to the new influent screen, the treatment process includes influent pumping, grit removal, biological nutrient removal (BNR), final clarifiers, and ultraviolet disinfection. The plant provides biological treatment and nitrogen removal through aeration and denitrification.

In 2020, as part of a plant upgrade, DTSA replaced their influent grinder with a Saveco (formerly Enviro-Care) FSM Perforated Filter Screen to remove debris from the incoming wastewater and prevent damage and clogging of downstream processes.  The screenings are discharged to an FSM Washer Compactor to wash, dewater, and compress the screenings.

The screening equipment was started up in October 2020, and the operations staff was trained on the operation and maintenance of the equipment.

The Saveco FSM Filter Screen is a fine screen with a very high capture rate, ideal for wastewater treatment plants seeking an influent screen that can do the job right. The screen is a fully automatic, self-cleaning screen constructed with 304 or 316 stainless steel. Perforations from 3 mm to 12 mm provide the right solids removal and protection of downstream equipment. The screenings capture for an FSM screen with 6 mm holes is double that of a 6 mm bar screen.

The Saveco FSM Washer Compactor is a screw auger press used to reduce the weight and volume of your screenings by washing the screenings and returning the organic material back to the plant flow. The Washer Compactor washes out more than 95% of the fecal matter, then dewaters, compacts, and transports screenings to produce a clean, dry product. The Washer Compactor is designed to handle debris ranging from rags and wipes to bricks, rocks, and 2x4s.

Some of the features & benefits of the Saveco (Enviro-Care) Screens are as follows:

• Extremely high capture rate
• Self-adjusting brush ensures effective cleaning with low brush wear
• All 302 or 316 stainless steel construction
• Handles large quantities of grease in the flow
• Minimal water use for cleaning
• Low maintenance requirements

Saveco screens combine practical design with reliability and efficient operation.

Saveco offers a variety of mechanical bar screens with a wide range of sizes, configurations, and screen openings.

Adding a screen at a wastewater treatment plant can offer several benefits, including:

• Improved Treatment Efficiency: Screens can help to remove debris, such as plastics, rags, and other solids, from wastewater before it enters the treatment process. This can help to improve the efficiency of the treatment process by preventing clogs, reducing wear and tear on equipment, and reducing maintenance needs.
• Reduced Maintenance Costs: Removing debris from the wastewater stream can also help to reduce maintenance costs by preventing damage to equipment, reducing the frequency of repairs, and increasing the lifespan of the equipment.
• Improved Water Quality: Screens can help to remove debris and solids that can contribute to poor water quality, including odors, turbidity, and contaminants. This can help to improve the overall quality of the treated wastewater and reduce the risk of pollution.
• Compliance with Regulations: Adding a screen to a wastewater treatment plant can help to ensure compliance with regulations related to discharge limits and water quality standards. This can help to prevent fines and penalties and protect the environment.
• Increased Safety: Removing debris from the wastewater stream can help to reduce the risk of accidents and injuries, such as slips, trips, and falls, that can occur when employees are working in or around wastewater treatment equipment.

We would welcome the opportunity to meet with you to discuss your screening application. For more information, contact us at sales@envirep.com.

by Mike Gillespie, P.E., President at Envirep

For more information about Saveco FSM screens or compactors, CLICK HERE.

For a complete list of our products, CLICK HERE to view our manufacturer’s line card.

SAVECO is also the exclusive sales organization in North America for FSM of Germany. This FSM partnership allows SAVECO to complete its headworks product line, including the FSM perforated plate belt screen and other products.

The WAMGROUP is a multi-national company founded as a designer and manufacturer of conveyors. The company quickly expanded into screens and solids handling equipment. They are a recognized leader in this essential industrial application with thousands of installations worldwide.

SAVECO has a wide variety of fine and coarse screening systems for municipal and industrial wastewater treatment systems. Contact us for help selecting the right screen system for your operations and choosing the proper screen size and screen opening size.

Envirep is a manufacturer’s representative for manufacturers of equipment used to pump, treat and dispose of wastewater and biosolids. We also represent manufacturers of equipment used to pump, treat, distribute, and store drinking (potable) water. Envirep serves the municipal and industrial water and wastewater market in Pennsylvania, New Jersey, Maryland, Delaware, the District of Columbia, and Virginia.