Stop & Shop Wastewater Treatment Plant

Stop & Shop Wastewater Treatment Plant

Total Nitrogen Removal For High Strength Commercial Wastewater

Stop & Shop is one of the premier supermarket chains in New England. Prior to 1995, most stores that were constructed without access to municipal sewer infrastructure were installed with conventional septic tanks and drain fields.

The high strength nature of waste streams from Stop & Shop facilities caused many of their drain fields to fail within 5-7 years and they budgeted accordingly for the expected replacement costs. In 1995 Stop & Shop installed their first AquaPoint Bioclere™ wastewater treatment system in an effort to preserve a store’s drain field. When an analysis several years later confirmed the field was as good as new, Stop & Shop determined that onsite treatment with a reliable, energy efficient biological treatment technology represented a 2-3 year return on investment. This store in Foxboro Massachusetts is one of 21 Bioclere™ systems serving Stop & Shop facilities throughout New England.

Stop & Shop’s Engineer selected an AquaPoint Bioclere ™ treatment system for its proven nitrification & denitrification performance capability, energy efficiency, ease of operation and small footprint. At the Foxboro facility, the Bioclere™ units are followed by a tertiary stage anoxic reactor for denitrification. Effluent from the plant is discharged through a conventional pressure dosed drain field.

Get a Quote

Design Characteristics

Influent Effluent
 DESIGN FLOW (GPD)  5,575 5,575
DESIGN TEMP (C) 10
BODs (mgjl) 800 < 30
TSS (mgjl) 400 < 30
TKN (mgjl) 100
AMMONIA-N (mgjl) 80 < 2
NITRATE-N (mgjl) < 5
TOTAL-N (mgjl) < 10

Performance Data

2009 BOD5 (mg/l) TSS (mg/l) Nh3 (mg/l)
JAN 6 32 2.5
FEB 27 16 4.2
MAR 23 12 6.5
APR 38 19 8.6
MAY 29 15 10
JUN 7.6 7 6.4
JUL 3 5 10
AUG 12 3 5.9
SEP 7.8 5 6.9
OCT 6 7 2.6
NOV 25 20 6.8
DEC 13 14 3.6
AVERAGE 16.5 12.9 6.2

System Diagram