Credit 4: Process Water Efficiency
Reduce process water use and process wastewater generation.
Credit 4.1 (1 point)
Calculate and document baseline of annual process water use and
process wastewater generation. Install water meters to measure process
Credit 4.2 (1 point)
Adopt technologies and strategies to reduce process water use and
process wastewater generation by 20%. Document the reductions from
Process water is defined as any water that is used in the laboratory.
Technologies & Strategies
Employ technologies/methodologies based on Pollution Prevention
hierarchy reduce, reuse, recycle.
Treat process wastewater so that is can be downcycled for use in
cooling towers, etc.
Apply segregation especially in baths so that materials
are separated from process water. This also recovers materials and
thereby reduces overall material use (applicable to credit 8 of
Materials & Resources).
Reduce water use for wash-up by using efficient floor wash machines
instead of hosing.
Work with scientists and researchers to modify process to reduce
water use (if feasible and does not interfere with science).
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