Research Of Factors On Anaerobic Fermentation Biological Hydrogen Production

In the field of developing new energy sources, environmental pollution to the characteristics of hydrogen is considered to be the ideal new energy. Many ways to produce hydrogen, in many physical, chemical, biological hydrogen production methods. The mixed bacteria (anaerobic activated sludge) is inoculated with microbial fermentation hydrogen production much attention to the scientific community, Broad prospects for development of this method, a lot of potential to achieve industrial scale production of biological hydrogen production technology. Anaerobic fermentation of biological hydrogen production is currently the main question is the hydrogen production rate is not high, hydrogen production is not continuous. The sludge pretreatment can improve hydrogen production performance. Sludge pretreatment methods , for the Quick Start hydrogen production reactor, shorten the fermentation time and improve response capabilities and equipment, hydrogen production process of enhancing the stability of hydrogen production, all have an important impact.In this experiment, the anaerobic wastewater treatment plant sludge for anaerobic microbial fermentation of inoculated biological hydrogen production by batch tests, in order to improve the performance of hydrogen production from two studies, one by sludge pre-experimental selection of 5 out the better of the three pretreatment methods to determine the optimal control parameters. Study of ecological factors on the other hand, in the pH, COD concentration, carbon and nitrogen ratio, temperature aspects of research on hydrogen production performance.The results show that:(1) In this study, which compared the five pretreatment sludge: acid treatment, alkali treatment, heat treatment. these methods are low cost, the result is ideal for large-scale industrial production.(2) Pretreatment with acetic acid used in the experiments, alkaline using ammonia. Optimal control parameters for the acid treatment:The best time of acid treatment 3.0h, pH value of 4.0, the best control parameters for the alkali treatment: The best alkali treatment time 3.0h, pH value of 10. Optimal control parameters for the best heat treatment time was 10 min, the temperature is 90℃.(3) Pretreatment of sludge obtained by the experimental method, the acid treatment was the best results.(4) Investigated in terms of ecological factors pH, COD concentration, carbon and nitrogen ratio, temperature and other ecological factors on hydrogen production ability. The results show that:the temperature of 35℃, pH=5.0, hydrogen production performance of the best. Gas production rate increased with increasing concentration of the influent COD increased, but the COD concentration in excess of 7000 mg/L resulted in reaction time to stop.Anaerobic bio-hydrogen test increased by pretreatment of the sludge is not only the hydrogen yield and hydrogen production as well as degradation of the organic compounds, waste water purification.