Applied Research of Microbial Degradation of High-concentration Organic Wastewater

As high-concentration organic wastewater is high in proteins, polysaccharides and its decomposition products of organic acids and other ingredients, direct emissions will lead to environmental pollution. In this paper, under light and anaerobic conditions, as the photosynthetic bacterium Rhodopesudomonas HY21 has removal characteristics of three high-concentration organic wastewater—soybean wastewater, citric-acid wastewater and distillery wastewater, studies have shown that after HY21 strains were treated for 9d, the COD removal rates of soybean wastewater, citric-acid wastewater and distillery wastewater were 58.17%, 84.38% and 86.84%, respectively. In addition, inoculation of HY21 strains had only a slight impact on performance of degrading organic wastewater, while organic wastewater pH could seriously affect the HY21 biodegradation ability of high-concentration organic wastewater, and the optimal pH for HY21 strains was between 6 and 8.