学会誌「EICA」

[研究発表] 硫化物によるメタン生成古細菌の不可逆的な失活を表現するための生物反応モデル

内容

[研究発表] 硫化物によるメタン生成古細菌の不可逆的な失活を表現するための生物反応モデル

巻

28巻2/3号2023年

Page

117

題名

硫化物によるメタン生成古細菌の不可逆的な失活を表現するための生物反応モデル

Title

Modeling Sulfide Inhibition on Methanogenʼs Decay

著者

フンティオァン, 孫夢，寺嶋光春，安井英斉

Authors

著者表記

Author attribution

Thi Oanh Phung, Meng Sun, Mitsuharu Terashima, Hidenari Yasui

著者勤務先名

北九州市立大学大学院<br>Faculty of Environmental Engineering, The University of Kitakyushu

Office name

著者所属名

キーワード

Key Words

methanogen, sulfide inhibition, anaerobic process

概要

Abstract

This study is focused on the biocidal effect of sulfide inhibition on methanogenic biomass. Using the methanogen-enriched cultures obtained from the digestate of the anaerobic digester in the wastewater treatment plant, Kitakyushu, Japan, batch inhibition tests were performed for 6 days to analyze the dynamic change of the living microorganism concentrations under varied sulfide concentrations. When the cultures were exposed by high sulfide without addition of methanogenic substrates, the methanogenic archaeal concentration were considerably reduced. Higher sulfide concentration in the system resulted in higher decay of the biomass. Besides, to collect the additional data to examine the impact of unionized H2S on methanogen decay, another batch test was performed with addition of sulfide at varying pH conditions. These experimental results are almost identical, it seems that the methanogen was inhibited by total sulfide, not only unionized H2S gas.