SCDPW Bergen Point Wastewater Treatment Plant Expansion
The Bergen Point Wastewater Treatment Plant provides primary and secondary treatment for the removal of biological oxygen demand (BOD) and suspended solids in the wastewater flow. Primary treatment consists of influent screening, influent pumping, grit removal, and primary sedimentation. Secondary treatment consists of an activated sludge process followed by secondary sedimentation, chlorination, and effluent pumping. Solids handling at the plant consists of chemical treatment of scavenger wastes, sludge thickening, dewatering, and off-site disposal.
In 2006, the actual annual average flow was 25.6 MGD, which is below 95% of the plant design flow, but the design BOD was exceeded for ten months out of the calendar year. In accordance with New York State Regulations 6 NYCRR Part 750-2.9 (c)(2), since the design loading rates were exceeded for more than eight calendar months, a plan for future growth was required.
In response to this issue and the need to provide capacity for development outside and adjacent to the district, D&B was retained as part of a joint venture to investigate, design and provide construction management services for an expansion of the Bergen Point Wastewater Treatment Plant. D&B and the engineering team completed the design of a 10 MGD expansion to the existing 30.5 MGD plant which included:
- Two 30 MGD, two 20 MGD and two 10 MGD variable speed drive raw wastewater pumps
- Four Primary Settling Tanks and associated systems
- Four 30hp Primary Sludge Pumps, variable frequency drives and associated systems
- Two Scum Ejectors
- Two Aeration Tanks
- Three 2,000hp aeration blowers
- Two 40hp variable speed Waste Activated Sludge (WAS) pumps and three 200hp variable speed Return Activated Sludge (RAS) pumps
- An RAS/WAS Pumping Station
- A Secondary Clarifier and associated systems