Factoid/2001/10/12
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< Beachapedia:Factoid | 2001 | 10
Secondary Treatment of Sewage Often Inadequate
- "Although secondary treatment of municipal sewage removes at least 85% of the organic material and suspended solids in wastewarter, only one-third of the nitrogen and phosphorus is eliminated. These 2 nutrients are the principal causes of eutrophication of receiving waters. Advanced treatment technologies, capable of eliminating up to 97% of the nitrogen and 99% of the phosphorus, are being implemented in regions susceptible to nutrient overenrichment from direct discharges." (Excerpt from "Marine Pollution in the United States," published by the Pew Oceans Commission, 2001, pg. 6)
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