摘要
进行了三组两相厌氧工艺中产甲烷相(UASB)反应器的酸化试验研究,考察了酸化后的状态并采取了三种不同的酸化后恢复手段。结果表明,反应器酸化后表现为COD去除率下降、pH值下降、碱度值下降、产气率减少,同时ORP值上升,菌群组成也发生明显变化;在恢复过程中用贮留的产甲烷相出水快速置换反应器中含有高浓度有机酸的污水,是反应器酸化后的快速恢复手段;工程运行中COD的常规监测有利于防止反应器的酸化;反应器气体产量可作为工程运行的指示性参数。
?Acidification experiments on the UASB reactor were conducted, which studied acidification states and the recoveries. Three kinds of remedy methods were adopted for the recovery. Results indicated that after the reactor acidification happend, it behaved as COD removal ability failure, the pH dropped, alkalinity declined, the gas production rate reduced, ORP raised, and microbial community changed. Displacing the acidified fermenting liquor with stored effluent from methenogenicphase reactor could solve the problem effectively. Routine measurement of COD could observe the the happening of acidification in time and biogas production rate can be used as indicative parameter in practical.
出处
《中国沼气》
2003年第2期7-10,共4页
China Biogas
基金
黑龙江省重大科技攻关项目(GA01C201-01)
哈尔滨工业大学校科学研究基金资助项目(HIT.2001.51)
关键词
酸化
恢复
COD常规监测
acidification
recovery
routine measurement of COD
