摘要
温室气体的排放量增加,加剧全球气候变暖,最终导致农业生态环境恶化。甲烷是一种典型的温室气体,生活污水是其中一个重要的贡献源。中国人口众多,生活污水排放量巨大,因此亟需对生活污水处理厂产生甲烷情况进行研究。本研究对南京市某污水处理厂的各个构筑物进行了采样分析,结果表明,该污水厂的主要甲烷释放构筑物为氧化沟、厌氧区、旋转沉砂池、二沉池和缺氧区,这5个构筑物中的甲烷释放量贡献占整体释放量的94.69%。经估算,该污水处理厂每年释放12 625.61 kg甲烷,根据化学需氧量的去除量,测算出甲烷排放因子为0.045 7 kg/kg(CH4/COD)。化学需氧量、水温和溶解氧是影响甲烷释放通量的重要影响因素。
An increaseing emissions of greenhouse gases has contributed to global warming,which has caused a deterioration of the agricultural ecological environment. Methane（CH4） is an tipical greenhouse gas and domestic sewage is an important contributor.China has a large population and a large domestic sewage discharge.Therefore,the generation of methane in domestic sewage treatment plant is a problem urgent to be studied.Samples were analyzed from each structure of the sewage treatment plant in Nanjing City. The results showed that the main structure of methane emission were oxidation ditch,anaerobic zone,rotary grit chamber,secondary settling tanks and anoxic zone. The methane emission of these five structures was accounted for 94.69% of the total discharge. It is estimated that 12 625. 61 kg/yr of methane will be released by this WWTP.Based on the chemical oxygen demand（COD） removal,CH4 emission factor was estimated to be 0.045 7 kg/kg（CH4/COD）.COD,temperature and dissolved oxygen are important influencing factors of methane flux.
作者
张星
陈敏东
高庆先
马占云
ZHANG Xing1, CHEN Min-dong1,2 , GAO Qing-xian3, MA Zhan-yun3(1.School of Environmental Science and Engineering, Nanjing University of Information Science ＆ Technology, Nanjing 210044, China; 2.Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control/Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Nanjing 210044, China ; 3. Chinese Research Academy of Environmental Science, Beijing 100012, Chin)
出处
《江西农业大学学报》
CAS
CSCD
北大核心
2018年第3期657-662,共6页
Acta Agriculturae Universitatis Jiangxiensis
基金
国家自然科学基金项目(91543115
21577065)~~
