摘要
为探究猪场曝气池和出水口废水水样的恶臭挥发性物质(Malodorous Volatile Compounds,MVCs)组成和释放特征,本文采用质子转移反应质谱(PTR-MS)检测了养猪废水在实验室模拟存储过程中顶空MVCs组成,检出了含苯芳香烃、胺类、硫化物、酮类、酚类、羧酸和吲哚7类共22种MVCs。两种废水中MVCs浓度较高是氨、硫化氢、丙酮、二甲胺、甲基乙基酮、甲硫醇和丙酸等。通过臭味活度值(OAVi)分析了两种废水的臭气组分相对贡献率,曝气池废水释放的MVCs臭味贡献度较高的是甲硫醇(28.77%)、3-甲基吲哚(19.05%)、对甲苯酚(18.45%)、硫化氢(15.05%)和二甲胺(7.15%);而出水口液样释放的MVCs臭味贡献度较高的是对甲苯酚(47.17%)、甲硫醇(38.26%)和3-甲基吲哚(14.57%)。胺类和羧酸类物质在整个储存过程中的浓度变化较小,硫化物在所有挥发性有机物中所占的比例较低,在存放过程中浓度变化差异较小。曝气池废水中释放速率最高的MVCs是氨、丙酮和二甲胺,分别为47928、27μg·h^(-1)·m^(-2)和15μg·h^(-1)·m^(-2)。主成分分析结果显示MVCs组分来源为4类,分别为含碳有机物的厌氧消化、蛋白质分解、粪浆及冲刷水中的颗粒物和动物排泄。
Proton transfer reaction mass spectrometry(PTR-MS)was used to detect the composition and release characteristics of malodorous volatile compounds(MVCs)from pig farm wastewater stored at constant temperature.Samples were collected in an aeration tank and outlet.The results showed that seven species with a total of 22 MVCs including benzene aromatic hydrocarbon,amine,sulfide,ketone,phenolic,carboxylic acid,and indoles were detected.The highest concentrations of MVCs included ammonia,hydrogen sulfide,acetone,dimethylamine,methyl-ethyl ketone,methanethiol,and propionic acid,et al.Odor activity values(OAVi)were used to analyze the relative contribution of odor components released from the two wastewaters.Methyl mercaptan(28.77%),3-methylindole(19.05%),p cresol(18.45%),hydrogen sulfide(15.05%)and dimethylamine(7.15%)released from aeration tank samples were the principal contributors of the odor,while cresol(47.17%),methyl mercaptan(38.26%),and 3-methylindole(14.57%)primarily created odor in the effluent. The concentration of amines and carboxylic acids changed slightly during the storage process, the proportion of sulfide compounds was low, and the concentration change was insignificant during the storage process. The highest release rates of MVCs in the aeration tank wastewater were ammonia, acetone and dimethylamine, with the release rates of 47 928, 27 and 15 μg·h^(-1)·m^(-2), respectively. According to the principal component analysis, the sources of MVCs could be divided into four categories, including the anaerobic digestion of carbon organic matter, protein decomposition, particulate matter in wastewater, and animal excretion.
作者
代小蓉
王雷平
满尊
王鹏涵
何宇轩
肖航
DAI Xiaorong;WANG Leiping;MAN Zun;WANG Penghan;HE Yuxuan;XIAO Hang(Center for Excellence in Regional Atmospheric Environment&Key Laboratory of Urban Environment and Health,Institute of Urban Environment,Chinese Academy of Sciences,Xiamen 361021,China;Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control,CAS Haixi Industrial Technology Innovation Center in Beilun,Ningbo 315830,China;College of Biosystems Engineering and Food Science,Zhejiang University,Hangzhou 310058,China)
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2022年第5期1067-1076,共10页
Journal of Agro-Environment Science
基金
国家自然科学基金青年科学基金(41605094)。
关键词
恶臭挥发性物质
恶臭污染
猪场废水
质子转移反应质谱
主成分分析
malodorous volatile compounds
odor pollution
pig farm wastewater
proton transfer reaction mass spectrometry
principal component analysis
