BILLIONS IN THE BALANCE: EPA'S [RE]INTERPRETATION OF THE FEDERAL BYPASS RULE
As biological systems become increasingly subject to potential influences of varying wet weather flows and concentrations of pollutants, publicly owned treatment works (“POTWs”) need to be operated in a flexible manner that achieves applicable environmental objectives. Historically, EPA and the States have allowed municipal facilities to route peak wet weather flows around the secondary treatment process, to disinfect the rerouted flows, and then blend the peak flow with the other, more highly treated, effluent. This process, generally referred to as “blending” or “slip streaming,” avoids washing out the activated sludge in the secondary treatment facility. Moreover, it avoids days, if not weeks (during the winter), of potential noncompliance often associated with reestablishing the plant biomass.
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Document Type: Research Article
Publication date: 2000-01-01
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