Evaluation of Biogas Production from Solid Waste using Pretreatment Method in Anaerobic Condition

In the present study, biohydrogen production optimized in working capacity 800ml batch reactor, using kitchen waste and mixed consortia in the equal in the batch reactor. The batch reactor was operated at the room temperature and at pH 7 throughout the study. The pH of the kitchen waste slurry was 6.7. Maximum chemical oxygen demand (COD) removal as the result of the biogas production was in the range 40-50%. This study shows the improvement in the hydrogen yield when the pretreatment methods was used like heat and pH. Pretreatment methods affect the activity of the methanogens or suppressed their activity and results in the increased production of the hydrogen. The time period for the pretreatment may be not sufficient due to which the percentage of hydrogen produced has not remarkable difference than the untreated reactors. The maximum percentage hydrogen was produced when the inocula was pretreated at 500C i.e. 26-28%. But when pH pretreatment was given to the inocula, about 40% of the hydrogen produced at pH 3. Due to the pretreatment effect percentage production of methane decreases which is important as the high production of methane will result in global warming.