STUDY ON METHANE PRODUCTION BY THERMOPHILIC ANAEROBIC DIGESTION OF MUNICIPAL SLUDGE AND CORN STRAW

LI Qiushi; GUO Xiang; LIU Bin; LIN Fawei; ZHAO Yingxin

doi:DOI:10.13205/j.hjgc.202207020

Volume 40 Issue 7

Sep. 2022

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2022 > 40(7): 139-145

LI Qiushi, GUO Xiang, LIU Bin, LIN Fawei, ZHAO Yingxin. STUDY ON METHANE PRODUCTION BY THERMOPHILIC ANAEROBIC DIGESTION OF MUNICIPAL SLUDGE AND CORN STRAW[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(7): 139-145. doi: DOI:10.13205/j.hjgc.202207020

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LI Qiushi, GUO Xiang, LIU Bin, LIN Fawei, ZHAO Yingxin. STUDY ON METHANE PRODUCTION BY THERMOPHILIC ANAEROBIC DIGESTION OF MUNICIPAL SLUDGE AND CORN STRAW[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(7): 139-145. doi: DOI:10.13205/j.hjgc.202207020

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STUDY ON METHANE PRODUCTION BY THERMOPHILIC ANAEROBIC DIGESTION OF MUNICIPAL SLUDGE AND CORN STRAW

doi: DOI:10.13205/j.hjgc.202207020

LI Qiushi^1,2,
GUO Xiang^{3
,
,},
LIU Bin⁴,
LIN Fawei³,
ZHAO Yingxin³

1. Tianjin Port Engineering Institute Co., Ltd, Tianjin Key Laboratory of Underwater Tunnel Construction and Operation & Maintenance Technology, Tianjin 300222, China;
2. CCCC First Harbor Engineering Co., Ltd, Tianjin 300461, China;
3. School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China;
4. Qingdao Institute for Ocean Engineering of Tianjin University, Qingdao 266235, China

Received Date: 2021-11-21
Available Online: 2022-09-02

Abstract

Abstract

Municipal sludge and corn straw mixtures from three cities,Tianjin,Zhaotong,Taiyuan in China were subjected to thermophilic anaerobic digestion (55℃) with domesticated secondary sedimentation tank sewage as the inoculum.The changes in pH,single-day and cumulative biogas production,and methane production under different systems with digestion time were investigated.The results indicated that anaerobic digestion of sludge-only exhibited no acidification,and its pH value was higher than that of the trials fed with corn straw.The maximum single-day biogas production of the sludge anaerobic digestion system appeared on the first or second day.With the addition of corn straw,the maximum single-day biogas production was delayed.The cumulative biogas production of the Tianjin sludge-only group reached 2004 mL,which was higher than the other two groups.The removal rates of VS under all fermentation systems were higher than 40%.As the digestion process stabilized,the methane content in biogas was maintained at 70%~85%(volume ratio).The specific methane production of Tianjin sludge-only reached 141.01 mL/g-VS.Gompertz model revealed that the sludge-only groups did not fit with the"S"curve,and the lag phase was very short.When the sludge:corn straw was 3:1 or 2:1,both the specific methane production,methane production rate,and lag phase had certain advantages.
- municipal sludge,
- corn straw,
- thermophilic anaerobic digestion,
- biogas

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References(18)

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