GAS PRODUCTION PERFORMANCE OF RICE STRAW ANAEROBIC FERMENTATION BY CRYOGENIC FREEZING PRETREATMENT

ZHANG Jian-wei; HUANG Tao; PENG Dao-ping; JIANG Shuai; XIA Yu-yang

doi:10.13205/j.hjgc.202008036

Volume 38 Issue 8

Nov. 2020

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2020 > 38(8): 217-221

ZHANG Jian-wei, HUANG Tao, PENG Dao-ping, JIANG Shuai, XIA Yu-yang. GAS PRODUCTION PERFORMANCE OF RICE STRAW ANAEROBIC FERMENTATION BY CRYOGENIC FREEZING PRETREATMENT[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(8): 217-221. doi: 10.13205/j.hjgc.202008036

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ZHANG Jian-wei, HUANG Tao, PENG Dao-ping, JIANG Shuai, XIA Yu-yang. GAS PRODUCTION PERFORMANCE OF RICE STRAW ANAEROBIC FERMENTATION BY CRYOGENIC FREEZING PRETREATMENT[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(8): 217-221. doi: 10.13205/j.hjgc.202008036

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GAS PRODUCTION PERFORMANCE OF RICE STRAW ANAEROBIC FERMENTATION BY CRYOGENIC FREEZING PRETREATMENT

doi: 10.13205/j.hjgc.202008036

Faculty of Geosciences and Environment Engineering, Southwest Jiaotong University, Chengdu 611756, China

Received Date: 2019-08-25

Abstract

Abstract

The rice straw was used as the raw material for anaerobic fermentation. Under the wet batch fermentation conditions with medium temperature (37 ℃), the low temperature freezing pretreatment was investigated at different temperatures (-5, -18, -40, -60 ℃) and times (12, 24, 36 h), to discover the effect of time on the gas production performance of rice straw anaerobic fermentation. The experimental results showed that low temperature freezing pretreatment significantly increased the COD content of straw dissolution, and D3 treatment increased by 7.65 times, compared with the control. Low temperature freeze pretreatment significantly reduced the lignin content by 16.36%~59.88%. Under the pretreatment of -5 ℃, -18 ℃, -40 ℃ freezing temperature, the gas production rate and methane content of rice straw anaerobic fermentation increased with the extension of pretreatment time. Among them, gas production rate of D2 treatment and methane content of D3 treatment was the highest, increased by 96.46% and 209.30% compared with the control group.
- rice straw,
- cryogenic freezing,
- pre-treatment,
- anaerobic fermentation

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References(16)

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