摘要
随着城市污水处理厂的大规模兴建和运营,大量剩余污泥的产生给水处理行业和环境保护带来巨大压力,污泥安全处置与资源化利用成为环保领域的热点问题。高温热解碳化剩余污泥制备污泥基活性炭材料是污泥资源化研究的重要方向之一,可实现污泥安全处置及环境修复的双重目的。目前主要的制备方法包括直接碳化法、化学活化法、催化活化法、添加碳源法等。通过概述各种制备方法的特点及产品性质,针对污泥基活性炭材料在水相中对有机污染物及重金属的吸附性能及其机理进行了分析,提出了污泥热解制备活性炭材料未来研究的主要方向,并从能源回收,特种行业污泥、废物资源化利用角度,对城市污水处理厂剩余污泥热解处置进行了展望。
With the extensive construction and operation of urban sewage treatment plant, massive excess sludge has brought great pressure to the water industry and environmental protection. The safe disposal and resource utilization of sewage sludge have been the hot issues in the field of environmental protection. The preparation of sludge-based carbons from carbonizing excess sludge at high temperature is one of the important directions of sewage sludge recycling, safe disposal and environmental remediation. The main methods include direct carbonization, chemical activation, catalytic activation, and carbon source addition, etc. The characteristics of various preparation methods and the properties of the product were summarized firstly, and the adsorption performance of organic pollutants and heavy metals in aqueous phase and the adsorption mechanisms were analyzed. Then the main research directions of preparation of activated carbons from pyrolytic sludge were proposed. Finally the outlook of excess sewage pyrolysis disposal was given from the perspectives of energy recovery, special industrial sludge and waste resource utilization.
出处
《环境工程技术学报》
CAS
2017年第3期306-317,共12页
Journal of Environmental Engineering Technology
基金
国家水体污染控制与治理科技重大专项(2012ZX07202-005)
关键词
污泥
资源化
材料
制备
吸附
sewage sludge
resource utilization
materml
preparation
adsorption
