Startup And Operation Of Sluge-microbial Film Hybrid Anaerobic Baffled Biological Hydrogen Production Reactor

A study of biological hydrogen production was performed in a Anaerobic Baffled Reactor (ABR). The reactor has five compartments with an effective volume of 43.2 L, the temperature of 35 ± 1℃.Brown granulated sugar as substrate and mixed culture of aerobic sludge as inoculation sludge, study the comparison on the start-up with low load and high load, start-up and operation of "sluge-microbial film "hybrid ABR used as a hydrogen production system and Influences of Hydraulic Retention Time on treating of brown sugar wastewater in an Anoxic Baffled Reactor.The result shows that compared the start-up with low load and high load, the reactor has high COD removal efficiency when starting up at low load condition (influent COD was 685-3395 mg/L), the total COD removal rate could reach above 70%.,but poor hydrogen production. When starting up at high load condition (influent COD is about 1300-2500 mg/L), the reactor has low COD removal efficiency, the highest total COD removal is about 48.53%,but performed better in terms of hydrogen production.Improved the Anaerobic Baffled Reactor (ABR) system, established a new Sluge-microbial Film Hybrid Anaerobic Baffled Reactor(SMHABR).The experimentation studied on the formation of ethanol type fermentation,the hydrogen production capacity and COD removal capacity. The experimentation were carried out for 180 days. Using brown sugar wastewater as raw material with hydraulic retention time of 12 h, the system of ethanol type fermentation bacteria could be formatted in 35 days through increasing the influent COD in a phased operation mode. The first compartment was the first to form ethanol type fermentation. When the influent COD was about 3500 mg/L, the maximum hydrogen production yield could be achieved, and the total hydrogen yield could reach 44.75 L/d. The hydrogen production in the second compartment was larger than that of the other compartments. When the influent COD was about 7100 mg/L, the maximum COD removal capacity could be achieved, the average total removal rate could reach 49.33%.The maximum hydrogen production yield and the maximum COD removal rate did not appear at the same time. It shows that the optimal influent concentration of hydrogen production and COD removal rate are not the same. This kind of situation is worth to be used in the actual application in the future according to the experimental purpose. When the influent COD concentration was too high, the organic acid accumulation in the reactor was too much, resulting in the reactor pH down to 3. Low pH affected the system’s hydrogen production efficiency, was not conducive to hydrogen production in the system. Although ethanol fermentation was formed in the system, the hydrogen production capacity was lower.The experiment was carried out 43 days. Study the hydrogen production and COD treatment capacity by way of a phased reduction of HRT. The maximum gas production could be got when the HRT is 8 h, influent COD is about 5000 mg/L, the average total gas production could reach 13.15 L/d. The maximum COD removal rate could be got when the HRT is 12 h, the average COD removal rate could reach 49.17%.HRT (8 h) of max hydrogen production and HRT (12 h) of max COD removal is not same.