Projects

Ewing-Lawrence Sewerage Authority

Central New Jersey

Ewing-Lawrence wastewater treatment plant serves a predominantly residential area of over 37 square miles having a present population of 60,000 persons. The system includes 300 miles of sewers from 8" to 48" in size, and 10 sewage pumping stations.

BS&J, as the Authority's Engineer for over 40 years (1947 through 1989), provided engineering services on all phases of its operations, including: rate schedules, wastewater management study in accordance with the requirements of the New Jersey Department of Environmental Protection, services in connection with a determination of the character of waste discharges, supervision of operations, bimonthly inspection of the plant, and preparation of annual operating budget. BS&J designed the original plant plus its enlargements and additions, enlarged 4 pumping stations and designed 5 others, and designed much of the sewer system including interceptor sewers, collectors, and laterals.

The original plant was 3.5 MGD and has been enlarged twice. The present capacity is 16 MGD. BS&J conducted pilot plant studies for nitrification in our laboratory, made process designs for new treatment processes, prepared the design and specifications, and inspected the work during construction. BS&J provided an Operator Training Program which included twenty-two (22), three (3) hour classes instructing in design, operation and maintenance of the treatment plant with its additions.  BS&J also provided Plant Start-up service for one (1) year after the additions had been placed in service, which included advice and one-site help, review of operations, and revision and updating the operation and maintenance manual.

Dechlorination Facilities - This project included preparation of design and specifications and construction inspection for a sulfur dioxide dechlorination system.

Odor Control System - This project included the preparation of a design for covering the existing gravity sludge thickeners and installing a carbon adsorber vessel to reduce odors emanating from this process.

Magnesium Hydroxide Facilities - This project the design of a conversion of the existing lime feed facility to a facility for the feed of magnesium hydroxide, for pH control to enhance the nitrification process. This project included the reuse of those facilities still serviceable and replacement as necessary to provide a viable, economical system.

Programs completed for the Authority include Industrial Pretreatment Program, Infiltration/Inflow Analysis and Chlorine Risk Management Program.


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