Transformation and degradation mechanism of landfill leachates in a combined process of SAARB and ozonation

Waste Management
Weiming ChenQibin Li

Abstract

Dissolved organic matter (DOM) in mature landfill leachate is significantly different from that in young landfill leachate; the composition of DOM greatly influences both biological treatment and advanced treatment processes. In the present study, the transformation and degradation mechanisms of landfill leachates in a combined semi-aerobic aged refuse biofilter (SAARB) and ozonation process was investigated using organic removal analysis, molecular weight distribution (MWD), 3D-EEM-PARAFAC analysis, UV-Vis spectroscopy, and linear regression. Results revealed that the DOM in mature landfill leachate contained a greater amount of aromatic substances and had higher molecular weight than DOM in young landfill leachate. After the SAARB process, humus contained in the SAARB was discharged with effluent from both mature and young landfill leachate. Due to the differences in composition and structure of organic matter, the COD removal efficiency (17.89%) of SAARB effluent from treating mature landfill leachate (mature SAARB effluent) was much lower than that (45.91%) of SAARB effluent from treating young landfill leachate (young SAARB effluent) under the same operational parameters of the ozonation process. As indicated by PARAFAC an...Continue Reading

Citations

Sep 16, 2019·Environmental Science and Pollution Research International·Zhepei GuAiping Zhang
Nov 11, 2019·Environmental Science and Pollution Research International·Zheqing HuangAiping Zhang
Jul 15, 2020·Environmental Science and Pollution Research International·Yan XiangAiping Zhang
Nov 2, 2020·The Science of the Total Environment·Chuanwei WuQibin Li
Aug 14, 2021·Water Research·Chunying TengWei Chen
Sep 28, 2021·Journal of the Air & Waste Management Association·Salvador VillamizarJoseph Soto
Dec 22, 2021·Journal of the Air & Waste Management Association·Ferenc Péter PachZoltán Bihari
Dec 31, 2021·Waste Management & Research : the Journal of the International Solid Wastes and Public Cleansing Association, ISWA·Yuyu Huang

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