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Anaerobic sequencing batch reactor treatment of landfill leachate

Anaerobic sequencing batch reactor treatment of landfill leachate

Water Research 33(15): 3225-3230

Anaerobic treatability of municipal landfill leachate was evaluated using lab-scale anaerobic sequencing batch reactors (ASBR) at 35degreeC. Experimental studies were conducted at wide-range of volumetric (0.4-9.4 g COD l-1 d-1) and specific (0.2-1.9 g COD g-1 VSS d-1) loading rates by varying hydraulic retention times (HRT) (10-1.5 days) and influent wastewater COD's (3800-15900 mg l-1). The COD removal efficiencies were in the range of 64-85% depending on volumetric and specific loading rates applied. The net daily biomass conversion yields were about 0.1 g volatile suspended solids (VSS) per g of COD removed. Bacterial decay rate constant was 0.01 d-1. The maximum volumetric methane production rate (VMPR) of 1.85 l CH4 l-1 d-1 was achieved at the volumetric loading rate of 9.4 g COD l-1 d-1. The specific methane production rates in terms of COD were about 1.06 g CH4-COD g VSS-1 d-1 in the reactor. The results have shown that about 83% of COD removed during the treatment was converted to methane. The average biomass yield was determined as 0.12 g VSS per gram of COD removed.

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Accession: 010165751

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DOI: 10.1016/s0043-1354(99)00048-2

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