Influence of flow rate variation on bio-energy generation during anaerobic co-digestion

• Methanization of petrochemical wastewater and thickened manure activated sludge is researched.
• Effect of the ten unlike flow rates of the substrates on methane yield is analyzed.
• Optimal flow rate of the substrates for the best energy generation is obtained.
• Energy and environmental assessment of anaerobic co-digestion have been quantified.
• The result revealed that anaerobic co-digestion at flow rate of 370 ml/day is cost-effective.

The anaerobic biodegradability of a combination of petrochemical wastewater (PWW) and thickened manure activated sludge (TMAS) was measured with a 4.5 l pilot-scale continuous stirred tank reactor, ran at mesophilic (37 °C) condition. The anaerobic digestion, biogas generation, and energy assessment were analyzed for ten flow rates; 170, 220, 300, 370, 410, 475, 540, 600, 640 and 680 ml/day at mesophilic condition (37 °C). The analytical data revealed that the environmentally complied optimum flow rate was 370 ml/day, for bio-energy generation.

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