Abstract:The SNAD (simultaneous partial nitrification, anaerobic ammonium oxidization and denitrification) process was successfully developed in a SBR to treat domestic wastewater. In the beginning, some anammox (anaerobic ammonium oxidation) granules were inoculated into the SBR to develop partial nitrification granules under high DO(500L/h). Afterwards, some anammox granules were added again to develop SNAD granules under low DO(40L/h). During the stable partial nitrification stage, the average ammonium removal rate was above 94% while the average nitrite accumulation rate was more than 95%. In the stable SNAD stage, 85% average total nitrogen removal rate was achieved. To the partial nitrification granules, batch tests indicated that the specific aerobic ammonium oxidation activity and nitrite oxidation activity were 0.234 and 0kgN/(kgVSS×d), respectively. To the SNAD granules, batch tests indicated that the specific anammox activity, denitrification activity over nitrite, aerobic ammonium oxidation activity and nitrite oxidation activity were 0.158、0.104、0.281、0kg/(kgVSS×d), respectively. The denitrification activity over nitrate was 0.061kg/(kgVSS×d) during 0~120min while the value was 0.104kg/(kgVSS×d) during 120~360min. The SEM observations indicated that the bacteria in the outer part of the SNAD granule were mainly short rod-shaped and spherical, which may be AOB and denitrification bacteria. In the inner part of the SNAD granule, the bacteria were mainly crater-shaped, which should be anammox bacteria.
郑照明, 李泽兵, 刘常敬, 陈光辉, 郑林雪, 马静, 李军, 赵白航. 城市生活污水SNAD工艺的启动研究[J]. 中国环境科学, 2015, 35(4): 1072-1081.
ZHENG Zhao-Ming, LI Ze-Bing, LIU Chang-Jing, CHEN Guang-Hui, ZHENG Lin-Xue, MA Jing, LI Jun, ZHAO Bai-Hang. The study of SNAD process start-up on domestic wastewater. CHINA ENVIRONMENTAL SCIENCECE, 2015, 35(4): 1072-1081.