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Fate of polynuclear aromatic hydrocarbons during anaerobic digestion of municipal wastewater sludges
The fate of six polynuclear aromatic hydrocarbons during anaerobic digestion of municipal sludges was investigated in a two‐stage pilot‐scale digester system. Primary digester removal efficiencies ranged from 23% for acenaphthene to 62% for acenaphthylene; secondary digester removal efficiencies ranged from 22% for acenaphthylene to 42% for phenanthrene. Most of the remaining mass of candidate compounds was present in the secondary digester waste sludge stream. Less than 2.5% of the candidate compounds entering the digestion system was present in the secondary digester supernatant. A dynamic model of the primary digester incorporating mixed first‐order biodegradation kinetics was calibrated for each of the candidate compounds. The biodegradation rate coefficients that were estimated for the primary digester ranged from 0.004 L/g·d for acenaphthene to 0.16 L/g·d for acenaphthylene. The biodegradation rate coefficient for acenaphthene did not significantly differ from zero.
Fate of polynuclear aromatic hydrocarbons during anaerobic digestion of municipal wastewater sludges
The fate of six polynuclear aromatic hydrocarbons during anaerobic digestion of municipal sludges was investigated in a two‐stage pilot‐scale digester system. Primary digester removal efficiencies ranged from 23% for acenaphthene to 62% for acenaphthylene; secondary digester removal efficiencies ranged from 22% for acenaphthylene to 42% for phenanthrene. Most of the remaining mass of candidate compounds was present in the secondary digester waste sludge stream. Less than 2.5% of the candidate compounds entering the digestion system was present in the secondary digester supernatant. A dynamic model of the primary digester incorporating mixed first‐order biodegradation kinetics was calibrated for each of the candidate compounds. The biodegradation rate coefficients that were estimated for the primary digester ranged from 0.004 L/g·d for acenaphthene to 0.16 L/g·d for acenaphthylene. The biodegradation rate coefficient for acenaphthene did not significantly differ from zero.
Fate of polynuclear aromatic hydrocarbons during anaerobic digestion of municipal wastewater sludges
Parker, Wayne J. (author) / Monteith, Hugh D. (author)
Water Environment Research ; 67 ; 1052-1059
1995-11-01
8 pages
Article (Journal)
Electronic Resource
English
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