摘要
为评价生物法同步沼气提纯与合成气利用工艺的可行性,文章通过批实验考察了不同初始CO含量、气液传质速率和污泥形态条件下微生物对CO的降解转化特性。结果表明:CO被厌氧微生物完全降解转化所需的时间随其初始含量升高而延长,当CO初始含量分别为10%,20%和40%时,絮状污泥完全降解CO所需时间分别为3,7和15 d,颗粒污泥需2~3 d;不同气液传质速率对絮状污泥降解CO的影响不大,但能明显影响颗粒污泥降解转化CO,在相同初始CO含量(20%)条件下,颗粒污泥在高气液传质速率时对CO的最大降解速率比低气液传质速率时提高近2倍;颗粒污泥实验组中CO的最大降解速率比絮状污泥提高了约85%~90%,有望在后续同步沼气提纯与合成气利用工艺中得到应用。
Degradation characteristics of CO by anaerobic microorganisms were investigated in batch experiments to assess the feasibility of simultaneous biogas upgrading and syngas utilization.Initial CO concentration,gas-liquid mass transfer rate and sludge type were selected as the main factors.The results showed that the time required for complete CO degradation was positively related to initial CO concentrations.As for 10%,20%and 40%of initial CO concentrations,3,7 and15 days were respectively required for flocculent sludge,and 2-3 days for granular sludge.Gas-liquid mass transfer rate had tiny effects on CO degradation with flocculent sludge,but obviously affected the CO degradation by granular sludge.With the granular sludge,the maximum CO degradation rate at high gas-liquid mass transfer rate almost doubled comparing with that at low gas-liquid mass transfer rate under the same initial CO concentration(20%).It was also observed that maximum CO degradation rate of granular sludge were 85%-90%higher than those of flocculent sludge,which showed great promise in simultaneous biogas upgrading and syngas utilization.
作者
颜锟
徐恒
崔康平
汪翠萍
常风民
马海玲
王凯军
YAN Kun;XU Heng;CUI Kang-ping;WANG Cui-ping;CHANG Feng-min;MA Hai-ling;WANG Kai-jun(School of Resources and Environmental Engineering,Hefei University of Technology,Hefei 230009,China;State Key Joint Laboratory of Environment Simulation and Pollution Control,School of Environment,Tsinghua University,Beijing 100084,China)
出处
《中国沼气》
北大核心
2017年第1期3-8,共6页
China Biogas
基金
国家科技支撑计划(2014BAC27B01)
关键词
CO
厌氧微生物
降解转化
合成气
沼气提纯
CO
anaerobic microorganisms
degradation
syngas
biogas upgrading
