Bugs and Carbon Make a PACT

by Harry W. Heath, Jr., Head; Wastewater Treatment Plant, Chambers Works, DuPont Co., Deepwater, NJ,

Serial Information: Civil Engineering—ASCE, 1986, Vol. 56, Issue 4, Pg. 81-83

Document Type: Feature article


At its Chambers Works in southern New Jersey, DuPont was ordered to sharply reduce the BOD load in the wastewater it discharged to the Delaware River. Out of this mandate came the PACT (Powdered Activated Carbon Treatment) process, in which the carbon and the bacteria work together in the same vessel. Removals of BOD and DOC are reportedly greater, and costs markedly lower, than for plants where the two processes are in separate vessels. The plant also features an unusual, state of the art landfill that is totally above ground. Since Chambers Works has excess capacity to treat chemical wastewaters, DuPont is marketing that capacity, and dilute chemical aqueous wastewaters arrive daily from all over the Eastern U.S. Meanwhile, the PACT process is being marketed by Zimpro Inc., of Rothschild, Wis., and is being used in three ways—to treat industrial wastewaters including pretreatment, chemically polluted groundwater, and as advanced or tertiary waste treatment.

Subject Headings: Chemical treatment | Chemical wastes | Wastewater treatment | Industrial wastes | Carbon fibers | Light rail transit | Load factors | Water discharge | United States | New Jersey | Delaware

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