When the Brockville, Ontario wastewater treatment plant faced more stringent effluent limits that increased sludge volumes, it overwhelmed existing digester capacity. They needed a cost-effective alternative to building another digester for $2.9 million.
The solution
JWC recommended installing two Monster Drum Thickeners to meet the new effluent requirements, the handling of which the plant supervisor’s team estimated at an additional 20 to 30m3 of primary sludge and another 200 to 250m3 of secondary sludge per day. These rotary drum thickeners feature adaptive controls to compensate for sludge concentration and flow fluctuation. With the Monster Drum Thickener’s 98%-plus sludge dewatering capture rate, the plant can now convert 200m3 secondary sludge into 20m3 of 5% thickened waste activated sludge.
As a result, less water is sent to the digesters, which reduces sludge volume and maximizes digester capacity. Although the digesters are handling an additional 40 to 50m3 of primary and secondary sludge, they remain well within their capacity limits. In addition, Monster Drum Thickeners are engineered for fast flocculation and low polymer use to reduce operating costs and further support digester efficiency.
Installing two Monster Drum Thickeners for less than $1 million allowed the Brockville, Ontario, wastewater treatment plant to meet stringent effluent limits without building a new digester, saving the municipality more than $2 million.
JWC Environmental engineers and manufactures a complete range of municipal wastewater solids reduction and removal equipment solutions.
800-331-2277 | www.jwce.com | jwce@jwce.com
