PHOSPHORUS RELEASE IN AEROBIC SLUDGE DIGESTION

Lu-Kwang Ju; Hemant K. Shah; Jim Porteous

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PHOSPHORUS RELEASE IN AEROBIC SLUDGE DIGESTION

Abstract

Significant (60–80%) phosphorus (P) release has been reported during anaerobic digestion of BNR sludge. The objectives of this study are to examine the P release in aerobic sludge digestion and to better understand its governing mechanisms. In this study, P release was examined using the secondary sludge from both conventional and BNR processes. The experiments were carried out at room temperature (22 ± 2 °C), with or without automatic control of pH (4.5–7.8), and under three aeration schemes: fully aerobic (DO at 3–4 mg/L), low-DO (0.2–0.8 mg/L), and cyclic (with alternate on/off-aeration). The released P concentrations were 20–80 mg/L for the conventional sludge and 60–130 mg/L for the bio-P sludge. Higher P release also occurred at low pH (

Significant (60–80%) phosphorus (P) release has been reported during anaerobic digestion of BNR sludge. The objectives of this study are to examine the P release in aerobic sludge digestion and to better understand its governing mechanisms. In this study, P release was examined using the secondary sludge from both conventional and BNR processes. The experiments were carried out at room...

Author(s)

Lu-Kwang JuHemant K. ShahJim Porteous

SourceProceedings of the Water Environment Federation

SubjectSession 61 – Research Symposium: Recycle and Fate in Biological Nutrient Removal

Document typeConference Paper

PublisherWater Environment Federation

Print publication date Jan, 2002

ISSN1938-6478

SICI1938-6478(20020101)2002:11L.1;1-

DOI10.2175/193864702784900110

Volume / Issue2002 / 11

Content sourceWEFTEC