基于能值分析的农村污水处理工艺可持续性评价

Sustainability evaluation of rural sewage treatment process based on energy analysis

随着我国城镇化和农村污水治理工作的不断推进,开展农村污水治理可持续性发展研究具有重要的现实意义。从工艺、地域等角度入手选取5个典型案例,分析农村污水处理工艺的可持续性。采用能值分析法探讨同种工艺在不同地区及不同工艺在同一地区的可持续性特点,并结合污水处理系统独特的复杂性对传统能值分析法进行改进,以更好地考察各系统对生态环境的影响及其可持续性。结果表明,对比分析分处常州、北京、广州的1#、2#和3#人工湿地系统,常州的1#系统的可持续性最强,北京的2#系统的可持续性最弱;对比地域相同的4#MBR、5#SBR、1#人工湿地系统发现,3个系统的可持续性依次增强。

With the rapid development of new urbanization and rural sewage disposal,it has important practical significance for studying the sustainable development of rural sewage treatment. To analyze the sustainability of rural wastewater treatment processes,five typical cases was selected from the aspects of the process and geography. Emergy method was applied to discuss the same process in different regions and different proesses in the same district. And the traditional energy analysis has been improved by considering the complexity of sewage treatment system for better evaluating the effect of the ecological environment and the sustainability in the different systems. The results show that when analyzing the sustainability of 1# artificial wetland system in Changzhou is the strongest among the 1#,2 #,3 # constructed wetland system,which is separately located in Changzhou,Beijing,Guangzhou,and 2 # in Beijing is the weakest. Meanwhile,the sustainability increases in turns when comparing the process of 4 # MBR,5 # SBR and 1 # constructed wetland systems while comparing different processes at the same region.