Isolation and Degradation Optimization of Filamentous Fungi Capable of Degrading Hydrothermal Treated Sludge Leachate

Discussion on filamentous fungus separation and optimization of degradation conditions of sludge filtrate from silk-degrading hydrothermal treatment is of great significance to the efficient and safe treatment of sludge filtrate from biological enhanced hydrothermal treatment. In this study, filamentous fungi that can efficiently degrade hydrothermal treatment sludge filtrate were isolated and screened from surplus sludge, and their treatment conditions were optimized. The results show that filamentous fungus Mucor sp. LS-1 has a good degradation effect on hydrothermal treatment sludge filtrate, and the optimal inoculation concentration of sludge filtrate is 50% (V/V ) original filtrate (~7000 mg/L ), and the optimal inoculation concentration of fungus is 15% (V/V ). Mucor sp. LS-1 Treatment of sludge filtrate under the optimum conditions can make filtrate COD decrease 64.65%, obviously improving the effluent quality of sludge filtrate. During the treatment of sludge filtrate by Mucor sp. LS-1, the degradation of COD in the filtrate is mainly related to the adsorption and biodegradation of filamentous fungi. Therefore, using Mucor sp. LS-1 to degrade hydrothermal treatment sludge filtrate is a new high-concentration sludge filtrate degradation technology with great potential.