Experimental Study on Methane Yield influenced by Biogas Project Fermentation Temperature

DOI

10.2991/jimec-18.2018.10How to use a DOI?

Keywords

Anaerobic; Fermentation; Temperature; High temperature; Sludge activity; Methane High temperature; Sludge activity; Methane

Abstract

We tried to understand the differences in the biogas production characteristics of anaerobic sludge digestion at moderate and high temperature. Based on the three-stage theory of anaerobic fermentation, using cellulose, glucose and acetate as substrates, this study compared and analyzed the methanogenic characteristics of anaerobic sludge fermentation at moderate and high temperature. The test results show that the special methane activity (SMA) of acetate, glucose and cellulose at 35℃ was 66.98mL·gVS-1·d-1, 36.11mL·gVS-1·d-1 and 23.33mL·gVS-1·d-1, respectively, and that at 55℃ was 69.05mL·gVS-1·d-1, 43.13mL·gVS-1·d-1 and 27.46mL·gVS-1·d-1, respectively. Compared with moderate temperature anaerobic sludge fermentation, the high temperature anaerobic sludge fermentation has a higher activity, and is featured by shorter hydrolysis time, faster digestion rate and higher methane yield, but the methane concentration of the biogas produced by high temperature anaerobic sludge fermentation is lower than that of the moderate temperature sludge fermentation. Meanwhile, the net energy balance under different temperature conditions was analyzed. Since the high-temperature anaerobic fermentation requires more energy, it is economically disadvantageous. In addition, high-temperature anaerobic fermentation can easily produce ammonia nitrogen inhibition, so the advantage of intermediate temperature fermentation is more obvious.

Copyright

© 2019, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Man Zhou
AU  - Luyao Guo
AU  - Siqi Liu
AU  - Zhiyong Zou
PY  - 2018/12
DA  - 2018/12
TI  - Experimental Study on Methane Yield influenced by Biogas Project Fermentation Temperature
BT  - Proceedings of the 2018 3rd Joint International Information Technology，Mechanical and Electronic Engineering Conference (JIMEC 2018)
PB  - Atlantis Press
SP  - 46
EP  - 49
SN  - 2589-4943
UR  - https://doi.org/10.2991/jimec-18.2018.10
DO  - 10.2991/jimec-18.2018.10
ID  - Zhou2018/12
ER  -