Nitrogen removal characteristics on contact oxidation techniques using filamentous bamboo as biofilm carrier for treatment of recalcitrant wastewater with high concentration and low C/N ratio.
Abstract:Recalcitrant wastewater with high concentration and low C/N ratio was treated for its nitrogen removal by contact oxidation technique, in which filamentous bamboo was used for biofilm carrier. Experimental results showed that total nitrogen removal percentage was 26.6%~96.95% when influent COD was 804~5100 mg/L and BOD 45.0~1100mg/L and the ratios of influent and effluent BOD/COD were respectively 0.01~0.46 and 0.07~0.75. Total nitrogen removal percentage was 4.94%~48.8% corresponding to COD of 98~251mg/L, TN of 28.0~105.1mg/L and COD/TN of 1.6~4.6. Above experimental results indicated that better denitrification results were achieved due to filamentous bamboo as a biological nitrogen removal system, which was suitable for treatment of recalcitrant wastewater with high concentration and low C/N ratio. Nitrogen removal fluctuated was due to secretion of bamboo juice secreted from the cavity of filamentous bamboo. The distribution characteristics of the main of bacteria was investigated to show that total number of bacteria at inlet and outlet were same roughly during the wastewater treatment, while bacteria, nitrifying bacteria were distributed in outlet, and nitrifying bacteria accounted for 1.57% of total bacteria, while denitrifying bacteria evenly distributed in the reactor.
曹文平, 张永明, 李亚峰, 张改红, 郭一飞. 竹丝填充床对高有机负荷及低C/N水质的脱氮特性[J]. 中国环境科学, 2010, 30(8): 1067-1072.
CAO Wen-Ping, ZHANG Yong-Ming, LI Ya-Feng, ZHANG Gai-Hong, GUO Yi-Fei. Nitrogen removal characteristics on contact oxidation techniques using filamentous bamboo as biofilm carrier for treatment of recalcitrant wastewater with high concentration and low C/N ratio.. CHINA ENVIRONMENTAL SCIENCECE, 2010, 30(8): 1067-1072.