剩余污泥高温热碱解及絮凝改善裂解液可生化性的试验研究  

Study on high temperature thermo-alkaline hydrolysis of excess sludge and flocculation to improve biodegradability of pyrolysis liquid

作　　者：章保[1,2] 彭星源 陈瑶 汪炎 郑晓浩[2,3] 肖岳冰 董方 ZHANG Bao;PENG Xingyuan;CHEN Yao;WANG Yan;ZHENG Xiaojie;XIAO Yuebing;DONG Fang(East China Engineering Science and Technology Co.,Ltd.,Hefei230024,China;Anhui Provincial Key Laboratory of Industrial Wastewater and Environmental Treatment,Hefei230088,China;Department of Municipal Engineering,School of Civil Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]东华工程科技股份有限公司,合肥230024 [2]工业废水及环境治理安徽省重点实验室,合肥230088 [3]合肥工业大学土木与水利工程学院,合肥230009

出　　处：《工业用水与废水》2022年第3期67-72,共6页Industrial Water & Wastewater

基　　金：国家自然科学基金项目(51308172);东华工程科技股份有限公司研发项目(W2020JSKF0733,W2021JSKF0888)。

摘　　要：为促进剩余污泥的减量化和资源化,采用高温热碱解耦合絮凝的方式来处理剩余污泥。高温热碱解处理污泥的碳源释放量为0.50 g[COD]/g[VS],热碱解所得泥饼的含水率在70℃条件下仅需9 h即可降至(26.82±3.57)%,同时实现了23.39%的干重减量。另外,相比于单纯的热碱解处理,污泥裂解液再经过铁、铝离子絮凝处理后,其m(BOD5)/m(COD)值增加超过了40%,脱氮效能也显著提升。因此,金属离子的絮凝作用可以改善污泥裂解液的可生化性,并且金属离子的价态越高,其作用效果越明显。裂解液可生化性的改善机制主要在于金属离子对难降解腐殖酸类物质的絮凝去除作用。In order to promote the reduction and resource recovery of excess sludge,high temperature thermo-alkaline hydrolysis coupled flocculation was used to treat excess sludge.After high temperature thermo-alkaline hydrolysis treatment,the release of carbon source from sludge was 0.50 g[COD]/g[VS],and the sludge cake moisture content could be reduced to(26.82±3.57)%and the dry weigh could be reduced by 23.39%at 70℃for only 9 h.In addition,compared with pure thermo-alkaline hydrolysis treatment,the m(BOD5)/m(COD)value of the pyrolysis liquid increased by more than 40%and its denitrification efficiency was also significantly improved after the iron and aluminum ion flocculation treatment.Therefore,the flocculation of metal ions could improve the biodegradability of the sludge pyrolysis liquid,and the higher the valence state of metal ions was,the more obvious the effect would be.The mechanism of improving the biodegradability of the pyrolysis liquid was mainly due to the flocculation removal of hard degradable humic acids by metal ions.

关 键 词：剩余污泥 污泥热碱解 污泥减量 脱氮效能 可生化性 

分 类 号：X703.1[环境科学与工程—环境工程]