A Study on Degradation of Organic Contaminants of the A/O Process of Denitrogenation Enhanced by Zeolite and Chemical Phosphorus Removal

The test results of Raman Spectra, TOC and UV254 showed that, in the A/O process of denitrogenation enhanced by zeolite and chemical phosphorus removal, the dissolved organic contaminants and non-dissolved organic contaminants in municipal wastewater were easily is adsorbed by activated sludge with zeolite. The number of heterotrophic bacteria in activated sludge with zeolite was several times to 55 times as great as that in activated sludge of the conventional A/O biological nitrogen removal process. The activated sludge with zeolite can improve biodegradability of organic contaminates, and the COD removal rate reached about 90%, TOC removal rate of colature by 0.22µm filter membrane was nearly 97% and TOC removal rate of colature by 0.45µm filter membrane reached 92%. The sludge with zeolite can depredate further organic contaminants, which was difficult to degrade using organisms.