A study on aerobic biodegradation (AT4) according to mixing ratio of sludge and sawdust

Although the consumption of fossil fuels is rapidly increasing, the development of other energy sources to replace fossil fuels is still insufficient. In this situation, marine reclamation of organic wastes is banned, and research on the fuel conversion using organic wastes is being actively carried out. Among them, fuelization using sewage sludge is progressing, but high water content and biodegradability of sewage sludge are a problem of conversion to fuel. So a method of mixing biomass is used. In this study, the biodegradability was measured according to the mixing ratio of sewage sludge and sawdust using AT4 test. As the ratio of sewage sludge in the mixture increased, the biodegradability of sewage sludge was increased up to 49.35 g O2/kg DM considering the biodegradability of sawdust. When the sewage sludge was more than 70%, the biodegradability of the mixture exceeded raw sample (54.67 g O2/ kg DM).