TY - JOUR
T1 - Alkaline fermentation of waste activated sludge with calcium hydroxide to improve short-chain fatty acids production and extraction efficiency via layered double hydroxides
AU - Ma, Xiao
AU - Ye, Jiongjiong
AU - Jiang, Li
AU - Sheng, Liang
AU - Liu, Jianyong
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 , 51808331 , 51778352 ), the Science and Technology Commission of Shanghai Municipality ( 16010500200 , 18230710900 ).
Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/5
Y1 - 2019/5
N2 - Ca(OH)2 addition was proposed to improve short chain fatty acids (SCFAs) production via alkaline fermentation of waste activated sludge (WAS), with CO32− and PO43− being removed simultaneously, so that the SCFAs extraction efficiency could be improved. Alkaline fermentation of WAS with Ca(OH)2 and NaOH addition were performed respectively, and the efficiencies of SCFAs extraction from the fermentation liquids via in situ layered double hydroxides (LDHs) were investigated. The results showed that, the SCFAs production was much more improved with NaOH addition than that with Ca(OH)2 addition. However, the SCFAs contents in the synthesized SCFAs-LDH were 6.7 ± 0.4 mg COD/L (control), 12.4 ± 0.5 mg COD/L (with NaOH addition) and 17.4 ± 0.4 mg COD/L (with Ca(OH)2 addition), respectively. This means that Ca(OH)2 addition is an effective way to improve SCFAs extraction from fermentation liquid of WAS.
AB - Ca(OH)2 addition was proposed to improve short chain fatty acids (SCFAs) production via alkaline fermentation of waste activated sludge (WAS), with CO32− and PO43− being removed simultaneously, so that the SCFAs extraction efficiency could be improved. Alkaline fermentation of WAS with Ca(OH)2 and NaOH addition were performed respectively, and the efficiencies of SCFAs extraction from the fermentation liquids via in situ layered double hydroxides (LDHs) were investigated. The results showed that, the SCFAs production was much more improved with NaOH addition than that with Ca(OH)2 addition. However, the SCFAs contents in the synthesized SCFAs-LDH were 6.7 ± 0.4 mg COD/L (control), 12.4 ± 0.5 mg COD/L (with NaOH addition) and 17.4 ± 0.4 mg COD/L (with Ca(OH)2 addition), respectively. This means that Ca(OH)2 addition is an effective way to improve SCFAs extraction from fermentation liquid of WAS.
KW - Anaerobic fermentation liquid (AFL)
KW - Calcium hydroxide
KW - Layered double hydroxides (LDHs)
KW - Short chain fatty acids (SCFAs)
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U2 - 10.1016/j.biortech.2019.01.128
DO - 10.1016/j.biortech.2019.01.128
M3 - Article
C2 - 30716603
AN - SCOPUS:85060844141
SN - 0960-8524
VL - 279
SP - 117
EP - 123
JO - Bioresource Technology
JF - Bioresource Technology
ER -
