鄂尔多斯城市污泥蚯蚓堆肥过程中重金属变化特征研究  

Research on the Characteristics of Heavy Metal Changes During the Vermicomposting Process of Urban Sludge in Ordos

作　　者：杨静 张诗若 尤文辉 詹鸿荣 李晓春 Yang Jing;Zhang Shiruo;You Wenhui;Zhan Hongrong;Li Xiaochun(Ordos Institute of Technology,Department of Chemical Engineering,Ordos,Inner Mongolia 017100)

机构地区：[1]鄂尔多斯应用技术学院化学工程系,内蒙古鄂尔多斯017100

出　　处：《包头职业技术学院学报》2024年第3期1-4,9,共5页Journal of Baotou Vocational & Technical College

基　　金：内蒙古自治区大学生创新创业训练计划项目“鄂尔多斯市城市污泥在矿山修复中的利用”(202214532014)成果。

摘　　要：随着城市化进程的加速,城市污水处理量和污泥产量不断上升,污泥中重金属的存在对环境和人体健康构成潜在风险。本研究以鄂尔多斯市污水处理厂的污泥为研究对象,探究蚯蚓堆肥城市污泥过程中污泥营养元素变化和重金属含量的变化特征。结果表明:通过蚯蚓堆肥技术,寒冷地区城市污泥中有机物快速下降,重金属中汞和砷含量降低,但是降幅较小;而铅和铬降幅较大,分别下降75.6%和78.7%。蚯蚓堆肥技术改善污泥的理化性质,提高污泥中重金属钝化效率。蚯蚓堆肥技术是一种有效的污泥处理和资源化利用方法。通过合理的堆肥工艺和添加材料,可以显著改善污泥的理化性质,提高其作为有机肥料的应用价值,同时降低其对环境的潜在风险。With the acceleration of urbanization,the volume of urban sewage treatment and sludge production is continuously increasing.The presence of heavy metals in sludge poses potential risks to the environment and human health.This study takes the sludge from the sewage treatment plant in Ordos as the research object to explore the changes in nutrient elements and the characteristics of heavy metal content changes during the process of urban sludge vermicomposting.The results show that through vermicomposting technology,the organic matter in urban sludge in cold areas rapidly decreases,and the content of mercury and arsenic in heavy metals is reduced,but the reduction is small;while the reduction of lead and chromium is significant,decreasing by 75.6%and 78.7%respectively.Vermicomposting technology improves the physicochemical properties of sludge and enhances the immobilization efficiency of heavy metals in sludge.Vermicomposting technology is an effective method for sludge treatment and resource utilization.By adopting reasonable composting processes and additive materials,the physicochemical properties of sludge can be significantly improved,its application value as organic fertilizer can be enhanced,and its potential environmental risks can be reduced.

关 键 词：污泥处理 蚯蚓堆肥 重金属 环境风险 资源化利用 

分 类 号：X703[环境科学与工程—环境工程] S141.4[农业科学—肥料学]