基于氧化钙-加热法的剩余污泥蛋白质提取率及嗅味值的影响因素研究  

Influencing Factors on Odor Value and Protein Extraction from Surplus Sludge by Calcium Oxide-heating Method

作　　者：傅金祥[1] 张凤麟 FU Jinxiang;ZHANG Fenglin(School of Municipal and Environmental Engineering,Shenyang Jianzhu University,Shenyang,China 110168)

机构地区：[1]沈阳建筑大学市政与环境工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2024年第1期187-192,共6页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家水体污染控制与治理科技重大专项子课题(2018ZX07601001-3)。

摘　　要：目的 研究温度、pH、反应时间和含水率对剩余污泥蛋白质提取率及嗅味值的影响。方法 以污水厂剩余污泥为原料、氧化钙为药剂,采用联合加热的方法处置剩余污泥,采用单因素和正交试验的方法来分析蛋白质提取率、嗅味值与各个反应条件之间的关系。结果 氧化钙-加热法提取剩余污泥蛋白质的最优工艺条件:pH为13,反应时间为4 h,温度为100℃,含水率为90%,蛋白质提取率为63.47%,嗅味值为6;氧化钙-加热法提取剩余污泥蛋白质各因素作用大小依次为:pH、反应时间、温度、含水率;各因素对嗅味值影响大小依次为:温度、pH、含水率、反应时间。结论 氧化钙-加热法有利于污泥水解反应的进行,但在碱性条件下温度过高会加剧美拉德反应,释放更多的恶臭物质而提高嗅味值,不利于提取剩余污泥中蛋白质。Various influencing factors such as temperature,pH,reaction time and water content are studied to explore their influence on the protein extraction rate and odor value of the remaining sludge.Taken the surplus sludge of the sewage treatment plant as the raw material and calcium oxides as the agent,the protein is extracted from surplus sludge by combined heating.The effect of the pH,reaction temperature,reaction time and material moisture content of the reaction system on the protein production and smell during the surplus sludge disposed is analyzed by using single factor and orthogonal experimental methods.In the process of extracting excess sludge protein by calcium oxide-heating method,the influencing factors are in a descending order as follows:pH,reaction time,temperature,and moisture content.And the influencing factors on the odor value,in a descending order:temperature,pH,moisture content,and reaction time.The optimal process condition for extracting protein from the remaining sludge is pH 13,reaction time 4h,reaction temperature 100℃,and water content 90%.Under the optimal process condition the protein extraction rate is 63.47%and the odor value is 6.It is conducive to the sludge hydrolysis reaction which uses calcium oxide-heating method.However,under alkaline conditions the excessively high temperature aggravates the Maillard reaction and releases more malodorous substances to increase the odor value,which is not conducive to the extraction of excess sludge protein.

关 键 词：氧化钙-加热法 剩余污泥 蛋白质 嗅味值 污泥水解 

分 类 号：TU99[建筑科学—市政工程] X52[环境科学与工程—环境工程]