堆肥
废物管理
重金属
环境科学
腐殖质
环境修复
有机质
污水污泥
石灰
绿色废弃物
污水处理
环境化学
环境工程
化学
污染
工程类
材料科学
土壤水分
生态学
生物
土壤科学
有机化学
冶金
作者
Rongwei Xiong,Xiufang Gao,Xinyue Tu,Yilin Mao,Li Jiang,Lu Zheng,Yitong Du
出处
期刊:Journal of Renewable Materials
[Computers, Materials and Continua (Tech Science Press)]
日期:2022-01-01
卷期号:10 (2): 469-486
被引量:4
标识
DOI:10.32604/jrm.2022.017226
摘要
The safe and efficient disposal and utilization of sludge are major issues to be solved in solid waste treatment and environmental protection due to the complex characteristics of sludge and the low rate of innocuous treatments. Composting is a process of decomposing organic matter and transformed low-molecular organic acids into high-molecular humus substances under the action of microorganisms. Although land-use after composting has become an important direction for sludge treatment, heavy metal pollution is still the bottleneck problem restricting land use of sludge compost. Adding zeolite, hydroxyapatite, and other conditioning agents to the composting process affects the concentration or form of some heavy metals and effectively reduces the environmental risk. Lime and phosphorus modifiers change heavy metal speciation in samples, playing a role in decreasing biological availability and mobility. In this study, the effects of sludge composting treatment and conditioning agents on the concentrations and forms of heavy metals are reviewed. This review will provide a theoretical basis to treat heavy metals in sludge composting and lay the foundation for the land utilization and waste recycling of sludge.
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