Beijing Qinghe 500,000t/d second reclaimed water plant sludge treatment project

Project profile：

Raw materials and capacity: Sewage sludge, 814 t/d (with 20% of solid content)
Biogas production: 51,600 Nm³/d
Biogas use: CHP
Purac Supply scope: anaerobic system

The technical rout of this plant is gravity concentration + sludge pretreatment + THP + anaerobic digestion + dewatering by chamber filter press. PURAC provides an overall process design and system integration consulting service, and at the same time be responsible for core equipment supply and technical services such as  commissioning and test run for the sludge anaerobic digestion system. This project has been running stably for many years.

The project is located at Qinghe second reclaimed water Plant, the scale of which is 500,000 tons/day. The technical route of sludge treatment in the whole plant is that the excess sludge is pumped into pre-dewatering treatment system after gravity concentration, and the primary sludge is directly pumped into the pre-dewatering system after grit removal, and then pretreated sludge will be pump into theTHP system.

After THP treatment the sludge is pumped into the digester, and the digestate is dewatered by chamber filter press, the TS of sludge cake is more than 40%.