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The City of Los Angeles has developed an award-winning program of biosolids reuse, primarily by farmland application of mesophilically digested, dewatered cake. Unfortunately, California has witnessed a proliferation of county bans and restrictions on biosolids application. Kern County, one of the City's major application areas, recently adopted an ordinance that will require Class A biosolids beginning in 2003. The City is moving aggressively to achieve Class A biosolids by use of advanced, thermophilic digestion. Pilot and full-scale tests have been conducted to evaluate alternative flowsheets and to support design decisions for the selected flowsheet. It is believed that Hyperion is the largest U.S. wastewater facility currently committed to producing Class A material by on-site advanced digestion.

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864702785302645

Publication date: January 1, 2002

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  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

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