Xiaoying Dong, Lijie Shao, Yan Wang, 等. Biogas by two-stage microbial anaerobic and semi-continuous digestion of Chinese cabbage waste[J]. 中国化学工程学报(英文版), 2015,23(5):847-852.
Xiaoying Dong, Lijie Shao, Yan Wang, Wei Kou, Yanxin Cao, Dalei Zhang. Biogas by two-stage microbial anaerobic and semi-continuous digestion of Chinese cabbage waste[J]. Chin.J.Chem.Eng., 2015, 23(5): 847-852.
Xiaoying Dong, Lijie Shao, Yan Wang, 等. Biogas by two-stage microbial anaerobic and semi-continuous digestion of Chinese cabbage waste[J]. 中国化学工程学报(英文版), 2015,23(5):847-852.DOI: 10.1016/j.cjche.2015.03.001.
Xiaoying Dong, Lijie Shao, Yan Wang, Wei Kou, Yanxin Cao, Dalei Zhang. Biogas by two-stage microbial anaerobic and semi-continuous digestion of Chinese cabbage waste[J]. Chin.J.Chem.Eng., 2015, 23(5): 847-852.DOI: 10.1016/j.cjche.2015.03.001.
Biogas by two-stage microbial anaerobic and semi-continuous digestion of Chinese cabbage waste
摘要
Abstract
Anaerobic digestion of Chinese cabbage waste was investigated through a pilot-scale two-stage digester at a mesophilic temperature of 37 ℃. In the acidification digester
the main product was acetic acid
with the maximum concentration of 4289 mg·L
-1
on the fourth day
accounting for 50.32% of total volatile fatty acids. The oxidation reduction potential (ORP) and NH
4
+
-N level decreased gradually with hydraulic retention time (HRT) of acidification. In the second digestion phase
the maximum methanogenic bacterial concentration reached 9.6×10
10
ml
-1
at the organic loading rate (OLR) of 3.5-4 kg VS·m
-3
with corresponding HRT of 12-16 days. Accordingly
the optimal biogas production was 0.62 m
3
·(kg VS)
-1
with methane content of 65%-68%. ORP and NH
4
+
-N levels in the methanizer remained between -500 and -560 mV and 2000-4500 mg·L
-1
respectively. Methanococcus and Methanosarcina served as the main methanogens in the anaerobic digester.
关键词
Keywords
references
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