生物表面活性剂烷基多苷强化含油污泥厌氧资源化利用的机制解析

Mechanism Analysis of Biosurfactant Alkyl Polyglycosides Strengthening Anaerobic Resource Utilizationof Oily Sludge

为了探究生物表面活性剂烷基多苷(APG)对含油污泥的厌氧资源化利用的影响,构建了序批式厌氧污泥反应器,探究了APG的含量对含油污泥资源化利用的影响,结果表明APG能够高效地提高含油污泥厌氧发酵产挥发性脂肪酸(VFA),且APG的最佳含量为6%,对应VFA的最大浓度为186.5 mg/g VSS。APG促进了VFA内小分子羧酸如乙酸和丙酸的占比。APG提高了含油污泥的溶出和水解过程,促进了有机质的释放。此外,APG有效促进了油脂的释放与利用,在6%APG组别内,油脂利用率高达75.6%。酶活性分析揭示APG促进了负责水解方面蛋白质和淀粉酶,酸化过程PTA、AK和BK的相对活性。APG促进了含油污泥厌氧发酵内副产物氨氮和磷酸盐的释放。研究结果拓宽了APG的应用范围并为含油污泥的资源化提供备选方案。

In order to investigate the effect of biosurfactant alkyl polyglycosides(APG) on the anaerobic resource utilization of oily sludge,a sequencing batch anaerobic sludge reactor was constructed.The effect of APG content on the resource utilization of oily sludge was investigated.The results showed that APG can efficiently increase the production of volatile fatty acids(VFA) by anaerobic fermentation of oily sludge,and the optimal APG content is 6%,corresponding to a maximum concentration of 186.5 mg/g VSS.The APG promotes the proportion of small molecule carboxylic acids such as acetic acid and propionic acid in VFA.The APG improves the dissolution and hydrolysis processes of oily sludge,promoting the release of organic matter.In addition,APG effectively promotes the release and utilization of oil,with a high oil utilization rate of 75.6% in the 6% APG group.Enzyme activity analysis revealed that APG promotes the relative activity of proteins and amylases responsible for hydrolysis,as well as PTA,AK,and BK during the acidification process.The APG promotes the release of by-products such as ammonia nitrogen and phosphate in anaerobic fermentation of oily sludge.The research results broaden the application scope of APG and provide alternative solutions for the resource utilization of oily sludge.