Little Ferry WPCF
Flow through the Little Ferry WPC facility in 2011 averaged 94.092 million gallons per day (mgd), an increase of seventeen percent (17%) from the previous year. Of the flow processed during 2011, an average of 1.45 mgd of treated effluent was supplied to Public Service Electric & Gas Company (PSE&G) for use as cooling tower make-up water at its power generating facility across the Hackensack River in Ridgefield. On August 28th, there was a peak flow of 285.7 mgd.
Safeguarding the health of Bergen County residents and improving the water quality of the Hackensack River continues as one of the most important objectives; the BCUA’s success of the latter being independently verified by newspaper and NJDEP reports. Daily influent carbonaceous biochemical oxygen demand (CBOD) concentration averaged 198 mg/l and after secondary treatment and disinfection was discharged at 13.2 mg/l, for a removal efficiency of 93.1%. Total suspended solids (TSS) removal was 91.1% based upon a yearly average daily wastewater influent concentration of 250 mg/l and 22.0 mg/l effluent discharge. A maximum daily average effluent concentration of 25 mg/l for CBOD and 30 mg/l of TSS as well as minimal removal efficiencies of 85% are required by the BCUA’s NJPDES permit. Therefore, based on these annual averages, the BCUA complied with NJPDES permit effluent limitations.
Materials removed from wastewater are thickened, stabilized by anaerobic digestion, and stored in tanks before barging or tanker-trucked by private contractors for further treatment works in Newark, N.J. In 2011, approximately 54,056,664 gallons of Class B biosolids, at an average percent solids of approximately seven percent (7%), were transported by barge or tanker truck from the Little Ferry water pollution control facility. After application of the Zimpro® treatment process to further reduce pathogens and dewatering by belt press, the Class A biosolids were transported by dump trucks from PVSC to the New Jersey Meadowlands Commission landfill in Lyndhurst, New Jersey.
Flow from the Edgewater WPC facility, during the year 2011 averaged 3.701 mgd with a peak daily flow of 13.6 mgd on May 18th. Influent TSS averaged 154 mg/l and influent CBOD averaged 124 mg/l. During 2011, the effluent TSS is averaged 22.3 mg/l and the effluent CBOD is averaged 18.7 mg/l. Percent (%) removals were 85.2% for TSS and 91.7% for CBOD. Analytic analyses show the water pollution control facility is in compliance with NJPDES requirements for all parameters.3,304,000 gallons of 6.5% (avg.) thickened sludge was processed through the gravity belt thickener and hauled to the Passaic Valley Sewerage Commissioners for disposal.