ANAEROBIC DIGESTION OF VEGETATION IN EBB ZONE ENHANCED BY CaO FOR METHANE PRODUCTION AND ITS MECHANISM

WANG Yuan-yuan; QIN Xiao-jie; NIU Lai-chun; FAN Jia-qi

doi:10.13205/j.hjgc.202009033

Volume 38 Issue 9

Nov. 2020

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WANG Yuan-yuan, QIN Xiao-jie, NIU Lai-chun, FAN Jia-qi. ANAEROBIC DIGESTION OF VEGETATION IN EBB ZONE ENHANCED BY CaO FOR METHANE PRODUCTION AND ITS MECHANISM[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(9): 208-212,218. doi: 10.13205/j.hjgc.202009033

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WANG Yuan-yuan, QIN Xiao-jie, NIU Lai-chun, FAN Jia-qi. ANAEROBIC DIGESTION OF VEGETATION IN EBB ZONE ENHANCED BY CaO FOR METHANE PRODUCTION AND ITS MECHANISM[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(9): 208-212,218. doi: 10.13205/j.hjgc.202009033

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ANAEROBIC DIGESTION OF VEGETATION IN EBB ZONE ENHANCED BY CaO FOR METHANE PRODUCTION AND ITS MECHANISM

doi: 10.13205/j.hjgc.202009033

College of Arts and Sciences, Yunnan Normal University, Kunming 650222, China

Received Date: 2019-09-17

Abstract

Abstract

In order to explore the effect of CaO pretreatment on anaerobic digestion of vegetation in the ebb-flow zone (VE) for methane production, four kinds of CaO with different mass fractions were used to pretreat VE at medium temperature, and the anaerobic digestibility of VE after CaO pretreatment was investigated. The experimental results showed that CaO pretreatment increased the content of soluble COD in VE, reduced the content of cellulose and lignin, and provided material basis for subsequent digestion process. When CaO dosage was 3%, the maximum methane accumulation was (229.8±6.3) mL/g, which was significantly higher than other groups. In addition, the volume fraction of methane in VE group pretreated with CaO increased with digestion time. CaO could promote the accumulation of volatile fatty acids (VFA). When the dosage of CaO was 3%, the maximum accumulation of VFA was (964±45) mg/L. CaO pretreatment accelerated the reduction of total suspended solids and volatile suspended solids in VE.
- vegetation in ebb zone,
- anaerobic digestion,
- methane,
- calcium oxide

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