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As a new clean energy source, the utilization and demand for hydrogen fuel are rapidly increasing. The integrated process of wastewater treatment of DESAR and energy recovery was developed in the studies. A new hydrogen anaerobe was isolated from the activated sludge. The optimal glucose concentration and the optimal initial pH were 12.0 g/L and 5. 5 respectively. The optimum C/N of the growth and hydrogen production in Rennanqilyf3 was (3.0 ～3.5): 1. The integrated process between DESAR system and biohydrogen production will be an important progress on energy recovery of DESAR system.