猪场污水高氨氮负荷处理过程中温室气体的排放特征  

Greenhouse gas emissions during the treatment of swine wastewater with high ammonia

作　　者：杨一铭 王恩全 隋倩雯[1,3] 陈梅雪[1,3] 郑蕊 魏源送[1,2,3] YANG Yiming;WANG Enquan;SUI Qianwen;CHEN Meixue;ZHENG Rui;WEI Yuansong(State Key Joint Laboratory of Environment Simulation and Pollution Control,Research Center for Eco-Environment Sciences,Chinese Academy of Sciences,Beijing 100085,China;University of Chinese Academy of Sciences,Beijing 100049,China;Laboratory of Water Pollution Control Technology,Research Center for Eco-Environment Sciences,Chinese Academy of Sciences,Beijing 100085,China;Anping Hongjia Environmental Protection Technology Co.,Ltd.,Hengshui 053600,China)

机构地区：[1]中国科学院生态环境研究中心环境模拟与污染控制国家重点联合实验室,北京100085 [2]中国科学院大学,北京100049 [3]中国科学院生态环境研究中心水污染控制实验室,北京100085 [4]安平县弘嘉环保技术有限公司,河北衡水053600

出　　处：《农业环境科学学报》2024年第3期688-695,共8页Journal of Agro-Environment Science

基　　金：中国农业科学院国际农业科学计划项目(CAAS-ZDRW202110);中国科学院生态环境研究中心自主部署项目(RCEES-TDZ-2021-26);中国科学院青年创新促进会项目(2021042);国家重点研发计划项目(2018YFD1100600,2021YFC3200601)。

摘　　要：为探讨畜禽养殖污水高氨氮负荷处理过程中的温室气体排放,本试验对缺氧/好氧(A/O)中试工程处理猪场沼液过程进行采样,对温室气体特性及影响因素进行了监测分析。结果表明:A/O工艺CH_(4)平均排放通量为1454.76 mg·m^(-2)·h^(-1),平均排放因子为0.85%,缺氧池排放占比最高,占总排放量的56.0%;N_(2)O平均排放通量为101.25 mg·m^(-2)·h^(-1),平均排放因子为0.64%,好氧池排放占比最高,占总排放量的87.1%。NO_(2)^(-)-N的积累会促使N2O排放,但对CH4排放有抑制作用。硝化细菌和反硝化细菌的反硝化反应可能是猪场污水处理过程中N_(2)O的主要排放途径。To explore the greenhouse gas emissions during livestock wastewater treatment processes under a high ammonia loading rate,this study sampled the anoxic/aerobic(A/O)process during the treatment of swine digestate at the pilot scale.We monitored the characteristics of GHG emissions and analyzed the influencing factors.The results indicated that the CH_(4) emission flux of the A/O process was 1454.76 mg·m^(-2)·h^(-1) and the emission factor was 0.85%.The largest source of CH4 emissions was the anoxic tank,accounting for 56.0%of the total emissions.The N_(2)O emission flux was 101.25 mg·m^(-2)·h^(-1) and the N_(2)O emission factor was 0.64%.The largest source of N2O emissions was the aerobic tank,accounting for 87.1%.An accumulation of NO_(2)^(-)-N contributes to N_(2)O emissions but inhibits CH_(4) emissions.The denitrification reactions of nitrifying bacteria and denitrifying bacteria may be the main emission pathways of N_(2)O during the treatment of swine wastewater.

关 键 词：温室气体排放 畜禽养殖污水 污水处理 甲烷 氧化亚氮 高氨氮负荷 

分 类 号：X713[环境科学与工程—环境工程] X701