Multistage biological contact oxidation for landfill leachate treatment: Optimization and bacteria community analysis

Landfill leachate is a wastewater contained solid waste and is hard to treat due to its complex composition. The most effective treatment is biological method among leachate transfer, biological treatment, and physical and chemical methods, however, the chemical oxygen demand (COD) removal efficienc...

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Published inInternational biodeterioration & biodegradation Vol. 125; pp. 200 - 207
Main Authors Yuan, Chunli, Wang, Youzhao, Zhu, Tong, Feng, Xuelin, Ma, Yongguang, Yu, Fenghao, Xie, Yuanhua
Format Journal Article
LanguageEnglish
Published Barking Elsevier Ltd 01.11.2017
Elsevier BV
Subjects
Aeration
Ammonium
Bacteria community structure
Bacterial leaching
Biodegradation
Biofilms
Biological effects
Biological treatment
Chemical oxygen demand
Communities
Community structure
Composition effects
Hydraulic retention time
Landfill
Landfill leachate
Landfills
Leachates
Multistage
Multistage biological contact oxidation
Nitrogen
Optimization
Orthogonal array test
Oxidation
Retention time
Solid wastes
Studies
Waste disposal sites
Waste treatment
Wastewater
Wastewater treatment
Water pollution treatment
Water treatment
Landfill leachate
Orthogonal array test
Multistage biological contact oxidation
Bacteria community structure
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Summary:Landfill leachate is a wastewater contained solid waste and is hard to treat due to its complex composition. The most effective treatment is biological method among leachate transfer, biological treatment, and physical and chemical methods, however, the chemical oxygen demand (COD) removal efficiency of present biological treatment has not been more than 90% at influent COD concentration of 2000 mg/L to 5000 mg/L. In this study, the multistage biological contact oxidation (MBCO) is performed for treating landfill leachate. The optimized parameters as followed achieve 91.28% COD removal efficiency: influent COD landfill leachate concentration of 4000 mg/L; 0.1 L/min·L (reactor volume) aeration rate; temperature (T) of 35 °C and hydraulic retention time (HRT) of 24 h and also obtained 318.64 mg/L ammonium nitrogen (NH3-N) effluent concentration, Besides, biofilm community structure show that Proteobacteria, Bacteroidetes and Firmicutes are identified as the dominant in phylum. All the results indicate that the MBCO is an effective technology for landfill leachate treatment.
ISSN:0964-8305
1879-0208
DOI:10.1016/j.ibiod.2017.09.008