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Research Article Open Access
Most CETPs use Reverse Osmosis technology in their tertiary treatment. The major problem in this technology is the disposal of RO concentrate. The present disposal methods for the RO reject are energy intensive. This paper focuses on the concept of generating biogas from RO reject by codigesting it with secondary treatment plant sludge. Biochemical methane potential test were conducted for different ratios of RO reject and secondary treatment sludge, to examine the optimum ratio for biofuel generation. From the results obtained it was observed that the mixture containing one part of seed sludge and two part of RO reject were the optimum ratio.