Behavior of dimethyl phthalate (DMP) in simulated landfill bioreactors with different operation modes |
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Authors: | Cheng-ran Fang Yu-yang Long Ying-ying Lu Dong-sheng Shen |
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Institution: | aDepartment of Environmental Engineering, Zhejiang University, Hangzhou 310029, China;bSchool of Civil Engineering and Architecture, Zhejiang University of Science & Technology, Hangzhou 310023, China;cEnvironmental Science Research & Design, Institute of Zhejiang Province, Hangzhou 310007, China;dCollege of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China |
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Abstract: | The behavior of dimethyl phthalate (DMP) from municipal solid waste (MSW) in the leachate and refuse of two simulated landfill bioreactors was compared. In one reactor, the leachate was circulated between a landfill and a methanogenic reactor, while the other reactor was operated using direct recirculation of the leachate. The results revealed that the original concentration of DMP in the refuse was approximately 3.3 μg g−1, and the concentration decreased greatly during decomposition of the waste in both reactors. The major loss of DMP from the landfill occurred in an active methanogenic environment in the later period, while the environment was acidic due to a high concentration of chemical oxygen demand (COD), volatile fatty acids (VFA), and contained a large volume of biologically degradable material (BDM) during the early stage. In addition, a high correlation was found between the residual DMP concentrations and the BDM of the refuse in both systems. Circulating the leachate between the landfill and a methanogenic reactor resulted in an increase in the biodegradability of MSW and the degree of waste stabilization. Furthermore, the removal of DMP was enhanced 14% in the landfill that was operated in conjunction with the methanogenic reactor when compared to the landfill in which there was direct leachate recirculation. |
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Keywords: | Dimethyl phthalate Landfill bioreactor Leachate recirculation Biodegradation Methanogenic reactor |
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