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| Malodorous volatile compounds released from pig wastewater and their component source apportionment |
| Received:September 29, 2021 |
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| KeyWord:malodorous volatile compounds;odor pollution;pig farm wastewater;proton transfer reaction mass spectrometry;principal component analysis |
| Author Name | Affiliation | | DAI Xiaorong | 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 | | WANG Leiping | 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 | | MAN Zun | 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 | | WANG Penghan | 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 | | HE Yuxuan | 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 | | 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 |
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| Abstract: |
| 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%）, pcresol（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. |
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