Multiple process integrations for broad perspective analysis of fermentative H2 production from wastewater treatment: Technical and environmental considerations

► Integrated evaluation of eleven combinations of dark, photo and anaerobic processes. ► Energy recovery and wastewater treatment were considered to identify optimum integration. ► Secondary and tertiary processes were effective for energy recovery and treatment. ► Organic flux analysis enumerated the effectiveness of each process on integration. ► Technical and environmental analysis showed practical feasibility of the integrations.