Alkaline fermentation of waste activated sludge with calcium hydroxide to improve short-chain fatty acids production and extraction efficiency via layered double hydroxides

被引：30
作者：
Ma, Xiao [1 ]
Ye, Jiongjiong [1 ]
Jiang, Li [1 ]
Sheng, Liang [1 ]
Liu, Jianyong [1 ]
Li, Yu-You [2 ]
Xu, Zhi Ping [3 ]
机构：
[1] Shanghai Univ, Sch Environm & Chem Engn, 333 Nanchen Rd, Shanghai 200444, Peoples R China
[2] Tohoku Univ, Grad Sch Engn, Dept Civil & Environm Engn, Aoba Ku, 6-6-06 Aza, Sendai, Miyagi 9808579, Japan
[3] Univ Queensland, Australian Inst Bioengn & Nanotechnol, Brisbane, Qld 4072, Australia
来源：
BIORESOURCE TECHNOLOGY | 2019年 / 279卷
基金：
中国国家自然科学基金;
关键词：
Anaerobic fermentation liquid (AFL); Short chain fatty acids (SCFAs); Layered double hydroxides (LDHs); Calcium hydroxide; NITROGEN REMOVAL; SEWAGE-SLUDGE; HYDROLYSIS; LIQUID; PHOSPHORUS; ACIDIFICATION; ACCUMULATION; TEMPERATURE; RECOVERY; CARBON;
D O I：
10.1016/j.biortech.2019.01.128
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
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.
引用
收藏
页码：117 / 123
页数：7
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