摘要
脱水污泥的污染问题影响了城市污水处理厂的生存和发展,中水的不同处置方式对当地的水资源和水环境影响也不一样,将污水处理、脱水污泥和中水处置结合起来构建污水处理生态系统有利于研究污水处理的综合效益、探索促进污水处理事业可持续发展的途径。能值分析方法可作为分析这一复合系统的工具,传统能值分析方法由于对废物处理处置和排放的影响没有考虑,因此提出了针对污水处理生态系统的改进的能值分析方法和指标体系,以明镜滩污水处理生态系统作为案例用两种方法进行了对比分析。结果表明,改进的能值分析方法更适合于污水处理生态系统的实际情况;不可更新资源能值流比值(NR)和废物排放能值流比值(WR)对污水处理生态系统的可持续性影响最大,其次是中水回用能值流比值(IR),污水处理生态系统的可持续性最终取决于NR、WR和IR三者的共同贡献;废物利用可提高污水处理生态系统的可持续性。不同废物利用方式由于对废物利用的程度不同以及对不可更新资源的消耗不同,因此对污水处理生态系统的可持续性影响不一样;在提出的8个方案中,"脱水污泥填埋+中水排放"方案的可持续性最低,而"脱水污泥制堆肥+中水回用"方案的可持续性最高。
Pollution from dewatered sludge affects municipal sewage treatment plants＇ survival and development, and different intermediate water disposal methods have different impacts on the local water resources and environment. Therefore, it is important to study the comprehensive performance of sewage treatment and explore measures on promoting its sustainability through constructing a sewage treatment ecological system composed of a sewage treatment system, a dewatered sludge disposal system and a intermediate water disposal system. Emergy analysis method has been used to analyze this complicated system. The traditional emergy analysis method ignores the impacts of wastes disposal and discharge and has been improved for evaluating a sewage treatment ecological system. Ming-jing-tan sewage treatment ecological systems projects proposed, as cases, were analyzed by traditional and improved emergy analysis methods. The results show that the improved method is more practical for evaluating a sewage treatment ecological system; the nonrenewable resources emergy ratio （NR） and discharged wastes emergy ratio （VVR） have the largest impacts on the sustainability, next comes from intermediate water reuse emergy ratio （IR）. , The sewage treatment ecological system＇s sustainability mainly depends on the three factors＇ common contribution; wastes reuse can increase the sustainability of the sewage treatment ecological system. Different methods of wastes reuse have different impacts on the entire system＇s sustainability due to different wastes reuse degree and different nonrenewable resources consumption; the emergy sustainable index （ESI） of the project ＂dewatered sludge land-filling ＋ intermediate water discharge＂ is the lowest （0.32） and the ESI of the project ＂dewatered sludge making aerobic compost ＋ intermediate water reuse＂ is the highest （1.05） among the eight projects proposed.
出处
《生态学报》
CAS
CSCD
北大核心
2008年第5期2300-2308,共9页
Acta Ecologica Sinica
基金
国家自然科学基金资助项目(50410719)~~
关键词
能值分析
污水处理
可持续性
指标体系
emergy analysis
sewage treatment
sustainability
index system
作者简介
张小洪（1970～），男，重庆垫江人，博士生，主要从事污染控制与废物资源化研究．E-mail：zxh19701102@126．com
