在线化学清洗对厌氧MBR产甲烷性能影响研究

发布时间：2018-06-04 15:07

本文选题：氢氧化钠 + 次氯酸钠　；参考：《中国环境科学》2017年09期

【摘要】：研究了厌氧膜-生物反应器(An MBR)污泥在不同浓度的Na OH(10~400mg/L)和Na Cl O(5~40mg/L)短期暴露下产甲烷活性(SMA)、产甲烷潜能(BMP)、脱氢酶活(DHA)和辅酶F_(420)活性的变化情况.结果表明,采用Na OH作为清洗剂时,SMA随着Na OH浓度的增加而下降;当Na OH浓度在200mg/L内,厌氧微生物产甲烷活性受抑制但未致死,当Na OH浓度超过200mg/L时,产甲烷微生物活性降低甚至致死.从相关酶活性来看,DHA对Na OH具有耐受性,而辅酶F_(420)在一定Na OH浓度范围内(10~100mg/L)受激发而活性增强,超过100mg/L其活性下降.当采用Na Cl O作清洗剂时,随着Na Cl O浓度的增加(0~40mg/L),SMA由50m LCH_4/(g VSS·d)下降至15m LCH_4/(g VSS·d);BMP在这一浓度范围内无明显变化;DHA和辅酶F_(420)活性均随Na Cl O浓度的升高而降低,Na Cl O浓度为40mg/L时,DHA降低30%,辅酶F420活性降低70%.
[Abstract]:The changes of methanogenic activity (SMA), methanogenic potential (BMP), dehydrogenase activity (DHA) and coenzyme (FV 420) in anaerobic membrane bioreactor (an MBR) sludge were studied under different concentrations of NaOH 10400 mg / L and NaCl O 5 + 40 mg / L). The results showed that the concentration of NaOH decreased with the increase of NaOH concentration, and the methanogenic activity of anaerobic microorganisms was inhibited but not killed when the concentration of NaOH was in 200mg/L, and when the concentration of NaOH was higher than 200mg/L, the methanogenic activity of anaerobic microorganisms was inhibited. The activity of methanogenic microorganism decreased and even died. According to the related enzyme activities, DHA is tolerant to NaOH, while Coenzyme FZ420) is stimulated and its activity is increased in a certain concentration range of NaOH, which is higher than that of 100mg/L. When Na Cl O is used as a cleaning agent, With the increase of Na Cl O concentration, the activity of DHA and coenzyme FG 420 decreased from 50m LCH_4/(g VSS d to 15m LCH_4/(g VSS DMA in this concentration range. The activity of DHA and coenzyme FG 420 decreased with the increase of Na Cl O concentration and decreased by 300.The activity of coenzyme F420 decreased by 70wt% when the concentration of Na Cl O increased to 40mg/L.
【作者单位】：同济大学环境科学与工程学院污染控制与资源化研究国家重点实验室;
【基金】：国家自然科学基金资助项目(51678423)
【分类号】：X703

【相似文献】