The Regulation Of Molasses Water In Hydrogen Production System And Bio-augmentation

Human survival and development are inseparable from the energy.Energy shortages have become the problem of the international community need to be resolved. Hydrogen is clean, efficient, renewable energy, but also is one an ideal substitute for fossil fuels. It is considered the most potential energy 21st century, the energy sector has become the focus of attention. Biological hydrogen production recover energy and clean environment with the dual effect Fermentative hydrogen production technology industry is a key factor to further improve the hydrogen production capacity, reduce production costs in the reactor system.Hydraulic retention time (HRT) is an important parameter which result of anaerobic hydrogen production process. This paper examines the HRT in the range of 2-12 h when changes in the hydrogen production efficiency of CSTR. The results show that hydrogen production in the hydraulic retention time from 12 hours to 8 hours of diminishing, the present growth slowly. When HRT is 8 hours,the maximum hydrogen production value is 7.92 L/d, TSDE to 95%, COD removal rate reached 25%. At this residence time not only to meet the needs of microbial metabolism, but also to ensure a continuous bio-hydrogen production. When the HRT was 8 h, the system ethanol-type fermentation is the main metabolic fermentation type. Total liquid end of the fermentation product is 2986 mg/L, ethanol and acetic acid fermentation product is 85% in the end of the percentage content.When the reactor HRT decreased from 12 h to 10 h, the reactor biomass increased significantly. HRT is 10 h when times are stable at 12.8 g VSS/L. In the HRT was 8 h, when the reactor reached the highest biomass of sufficient biomass and biological activity of hydrogen production with high effect. Therefore, the reaction system to maintain more and higher microbial activity of microbial biomass, anaerobic fermentative hydrogen production system is critical to ensure an efficient hydrogen production. System of anaerobic metabolism of activated sludge microbial community can affect the fermentation sludge system.Remain unchanged under HRT 8 h, in a certain range, increased OLR could improve the hydrogen production anaerobic sludge hydrogen production system significantly. Hydrogen production anaerobic sludge system in the OLR 18 kg/(m3·d) the average time to achieve stable hydrogen production capacity of 7.92 L/d, compared with OLR 12 kg/(m3.d) conditions (5.94 L/d) Increased by 25%, over the OLR 6 kg/(m3·d) conditions (3.78 L/d) increased 52.3%.Hydrogen production from anaerobic fermentation of activated sludge system to improve the impact of OLR has a certain ability to adapt, but this adaptation is limited. In our experimental conditions, OLR to 24 kg/(m3·d), the anaerobic sludge of hydrogen production system the following pH decreased to 3.7 rapidly, while the ORP increased to-230 mV. Anaerobic activated sludge microorganisms can not afford to increase the organic load caused by environmental changes, and its activity was severely inhibited. Hydrogen production capacity of the reactor sharp decline in acid fermentation of organic waste water,type is also changed.Increased hydrogen production capacity and reduce the cost of hydrogen fermentation hydrogen production technology the key to industrial production. Bioaugmentation is developed to improve the effect of a new wastewater treatment technology in recent years.Studies show that the control COD is 6000 mg/L, HRT was 8 h. CSTR reactor was stable running afer 21ds, put R3 bacteria into the reactor. The reactor run a total of 30 days, biological enhance at the eighth day, the twelfth day and twenty-one days respectively. The dosage of hydrogen producing bacteria (accounting for the mass fraction of activated sludge MLVSS) were 1.2%,3.7%,4.9%.Afer bioaugmentation, the hydrogen production system achieved a typical pH value in the range of ethanol fermentation. Strengthen the role of biological hydrogen production can promote fermentation type of reactor to hydrogen production, higher ethanol type fermentation changes.Hydrogen Producing Bacteria Bioaugmentation could improve the initial hydrogen production rate with stable operation at low load in the hydrogen production system significantly. After 3 times of biological strengthen.Hydrogen production rate increased 3.6 mmol/(kg·d) to the enhanced 5.7 mmol/(kg·d), is to strengthen the pre-1.5 times biological hydrogen production system.