Combined treatment of domestic wastewater with landfill leachate using aerobic moving bed bioreactor (AeMBBR)

Abstract

In this study, the treatment of landfill leachate (LFL) and domestic wastewater using an aerobic moving bed biofilm reactor (AeMBBR) was investigated. AeMBBR was filled with 30 % (v:v) biocarrier material (Kaldnes K1). The tested volumetric ratio of landfill leachate was 10%. The impact of varying hydraulic retention times (HRTs) (24-12-6 h) at a constant dissolved oxygen (DO) of 3.2 mg/L was investigated for system optimization. AeMBBR was successfully operated (HRT: 6h) for LFL and domestic wastewater treatment corresponding to 94 %, and 78 % ammonium nitrogen (NH4-N) and total organic carbon (TOC) removals, respectively. Additionally, Proteobacteria (66%) have been identified as the predominant culture in the biofilm layer, which plays a significant role in the co-treatment of domestic wastewater and LFL. Considering the results obtained; it was found that a significant amount of ammonium nitrogen was successfully removed.

Keywords

• Domestic wastewater
• Kaldnes K1
• Landfill leachate
• Moving bed bioreactor
• Nitrification

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