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|a eng
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|a Iranpour, Reza
|e verfasserin
|4 aut
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|a Full-scale class A biosolids production by two-stage continuous-batch thermophilic anaerobic digestion at the hyperion treatment plant, Los Angeles, California
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|c 2006
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|a Text
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|a ohne Hilfsmittel zu benutzen
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|a Date Completed 22.01.2007
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|a Date Revised 22.09.2019
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|a published: Print
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|a Citation Status MEDLINE
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|a The City of Los Angeles Hyperion Treatment Plant (HTP) (California) converted its anaerobic digesters to thermophilic operation to produce Class A biosolids. Phase IV tests demonstrated compliance of a two-stage, continuous-batch process with Alternative 1 of U.S. Environmental Protection Agency 40 CFR Part 503 (U.S. EPA, 1993), which defines the time-temperature requirement for batch treatment (T > or = 56.3 degrees C at 16-h holding). Fecal coliforms, Salmonella sp., viable helminth ova, and enteric viruses were not detected in biosolids in the postdigestion train, including the truck-loading facility and the farm for land application as the last points of plant control where compliance is to be demonstrated. The same results were achieved during Phase V tests, after lowering the second-stage holding temperature to 52.6 degrees C to reduce the elevated methyl mercaptan production that was observed during Phase IV. Hence, the Phase V process complied with Alternative 3 of 40 CFR Part 503. Currently, HTP operates its digesters under the same conditions as tested in Phase V. In 2003, monthly monitoring of the biosolids at the truck-loading facility and the farm for land application demonstrated consistent compliance with Alternative 3
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|a Journal Article
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|a Sewage
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|a Cox, Huub H J
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|a Fan, Steve
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|a Abkian, Varouj
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|a Minamide, Traci
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|a Haug, Roger T
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|i Enthalten in
|t Water environment research : a research publication of the Water Environment Federation
|d 1998
|g 78(2006), 11 vom: 20. Okt., Seite 2244-52
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|x 1554-7531
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|g volume:78
|g year:2006
|g number:11
|g day:20
|g month:10
|g pages:2244-52
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