TY - JOUR
T1 - Simultaneous release of polyphosphate and iron-phosphate from waste activated sludge by anaerobic fermentation combined with sulfate reduction
AU - Hu, Peishan
AU - Liu, Jianyong
AU - Wu, Liang
AU - Zou, Lianpei
AU - Li, Yu You
AU - Xu, Zhi Ping
N1 - Funding Information:
This study was financially supported by the National Natural Science Foundation of China ( 51578329 , 51778352 ), the Science and Technology Commission of Shanghai Municipality ( 18230710900 ).
Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2019/1
Y1 - 2019/1
N2 - Iron is widely used in sewage treatment systems and enriched into waste activated sludge (WAS), which is difficult and challenging to phosphorus (P) release and recovery. This study investigated simultaneous release performance of polyphosphate and iron-phosphate from iron-rich sludge via anaerobic fermentation combined with sulfate reduction (AF-SR) system. Batch tests were performed, with results showing that AF-SR system conducted a positive effect due to the relatively low solubility of ferrous sulfide in comparison with ferric phosphate precipitates. Simulation study was performed to investigate the total P release potential from actual waste activated sludge, finding that about 70% of the total P could release with the optimized pH of 7.0–8.0 and the theoretical S 2− /Fe 2+ molar ratio of 1.0. A potential new blueprint of a wastewater treatment plant based on AF-SR system, towards P, N recovery and Fe, S, C recycle, was finally proposed.
AB - Iron is widely used in sewage treatment systems and enriched into waste activated sludge (WAS), which is difficult and challenging to phosphorus (P) release and recovery. This study investigated simultaneous release performance of polyphosphate and iron-phosphate from iron-rich sludge via anaerobic fermentation combined with sulfate reduction (AF-SR) system. Batch tests were performed, with results showing that AF-SR system conducted a positive effect due to the relatively low solubility of ferrous sulfide in comparison with ferric phosphate precipitates. Simulation study was performed to investigate the total P release potential from actual waste activated sludge, finding that about 70% of the total P could release with the optimized pH of 7.0–8.0 and the theoretical S 2− /Fe 2+ molar ratio of 1.0. A potential new blueprint of a wastewater treatment plant based on AF-SR system, towards P, N recovery and Fe, S, C recycle, was finally proposed.
KW - Anaerobic fermentation
KW - Iron-phosphate (Fe-P)
KW - Polyphosphate (poly-P)
KW - Sulfate reduction
KW - Waste activated sludge
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U2 - 10.1016/j.biortech.2018.09.117
DO - 10.1016/j.biortech.2018.09.117
M3 - Article
C2 - 30268013
AN - SCOPUS:85053843838
SN - 0960-8524
VL - 271
SP - 182
EP - 189
JO - Agricultural Wastes
JF - Agricultural Wastes
ER -
