Biological treatment of closed landfill leachate treatment by using Brevibacillus panacihumi strain ZB1

4th International Conference on Civil and Environmental Engineering for Sustainability

地球科学;生态环境科学;经济学

Er, X.Y.^1 ; Seow, T.W.^1 ; Lim, C.K.^1 ; Ibrahim, Z.^2 ; Mat Sarip, S.H.^3

Faculty of Technology Management and Business, Universiti Tun Hussein Onn Malaysia, Parit Raja, Batu Pahat, Johor

86400, Malaysia^1

Faculty of Biosciences and Medical Engineering, Universiti Teknologi Malaysia, Skudai, Johor Bahru, Johor

81310, Malaysia^2

Institute of Bioproduct Development, Universiti Teknologi Malaysia, Skudai, Johor Bahru, Johor

81310, Malaysia^3

关键词: Anaerobic-aerobic treatment;    Biological treatment;    Closed landfills;    Discharge standards;    Heavy metal contents;    Landfill management;    Treatment efficiency;    Waste decompositions;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/140/1/012012/pdf
DOI  :  10.1088/1755-1315/140/1/012012

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Landfills are widely used for solid waste disposal due to cost effectiveness and ease of operation. Poor landfill management generally accompanied with production of toxic leachate. Leachate refers to heavily polluted liquid produced due to waste decomposition and rainwater percolation. Direct discharge of untreated leachate into the environment will lead to environmental degradation and health hazards. The aim of this study was to study the efficiency of leachate biological treatment by B. panacihumi strain ZB1. In this study, leachate wastewater was treated by B. panacihumi strain ZB1 via 42-days anaerobic-aerobic treatment. Leachate characterization of both raw and treated samples was carried out based on ammonia nitrogen content, chemical oxygen demand (COD) and heavy metal content. Through leachate characterization, raw leachate carried high concentrations of ammonia nitrogen (1977 mg/L), COD (5320 mg/L) and certain heavy metals exceeding discharge standard. From this study, B. panacihumi strain ZB1 able to remove COD nearly 40%, ammonia nitrogen nearly 50% and different degrees of heavy metals from the leachate sample after combined anaerobic-aerobic treatment. As a result, B. panacihumi strain ZB1was expected to treat the leachate wastewater with certain treatment efficiency via combined anaerobic-aerobic treatment.