Study On The Technology Of Hydrogen Production By Photosynthetic Bacteria From Swine Manure Wastewater

Energy lack and environmental pollution are the two greatest difficulties facing the human being in the future. Hydrogen, with the advantages of high thermal density, clean combustion and renewability, is considered as one of the most potential new energy in the energy field. With the social development, its purpose and demand are increasing quickly. Obtaining clean hydrogen by bio-technology is the theme that many countries in the world are studying greatly. Photosynthetic bacteria have the activity of hydrogen photoproduction and can convert solar energy into hydrogen energy utilizing organics. In present research, the most substrates of photosynthetic bacteria treating are various industrial organic wastewaters. It isn't reported that swine manure is used as substrate. Now the swine manure from livestock and poultry farms has become one of the chief pollution resources. So the technology of hydrogen production by photosynthetic bacteria from swine manure wastewater, integrating environment management and clean energy production, is a new important research direction of new technology research and development in the field of renewable energy and environment protection.In this paper, the fundamental research of the technology of hydrogen production by photosynthetic bacteria from swine manure was carried out emphatically. Phodobacter sphaeroides1.1737 strain was used to study the effect of material concentration, temperature, light intensity, material initial pH and initial activity of PSB on hydrogen photoproduction, The change rules between the main factors and hydrogen production quantity were got through single factor experiments. Then, according to the above experimental results, an orthogonal experiment was designed. It was shown that temperature is the most notable factor influencing the hydrogen production quantity. The sequence of other factors according to influencing degree is as follows: light intensity→material pH→initial activity of PSB. The optimal level conditions of all factors, that is, the best condition combination of hydrogen production is that temperature is 30℃, light intensity is 1600lux, material pH value is 7.0 and initial activity of PSB is 60h.One of the most prominent features of the technology of hydrogen production by photosynthetic bacteria from swine manure is the combination of biological hydrogen production and the swine manure wastewater treatment, that is, obtaining plenty of clean energy hydrogen at the same time of treating wastewater. And the technology has the characteristics of obvious environmental, social and economic benefits. It is one comprehensive technology integrating wastewater treatment and wastes comprehensive utilization, and has a very wide application prospect.