摘要
采用UASB反应器,接种由好氧颗粒污泥、厌氧颗粒污泥、氧化沟活性污泥及短程硝化活性污泥组成的混合污泥,以污泥脱水液经短程硝化处理后水质为进水,在温度(30±0.2)℃,pH值7.3～7.9,初期进水氨氮、亚硝氮容积负荷分别为0.07,0.10kg/(m3·d)条件下,经过24d运行,氨氮和亚硝氮得到稳定同步去除,186d时TN去除负荷达0.99kg/(m3·d).启动初期,氨氮、亚硝氮进水浓度分别为20,30mg/L,二者浓度随去除量增加而逐级增加,最高分别达到157,216mg/L;启动过程中,系统受到O2抑制以及O2和亚硝氮基质的连续抑制,分别经过了约10d和30d才得以恢复.厌氧氨氧化(ANAMMOX)反应与反硝化反应可以共存于系统中,产气量与总氮去除呈正比关系,可及时地指示系统运行状态,对气体成分检测,氮气含量在99.8%.在稳定期ANAMMOX反应呈pH值升高而碱度略有降低.接种混合污泥、低基质负荷启动ANAMMOX,可30d内实现稳定的氨氮和亚硝氮同步去除,180d左右启动成功.
Under the condition of reactor in （30±0.2）℃, influent pH of 7.3 to 7.9, reject water of nitfitation as influent, and initial ammonia and nitrite nitrogen loading of 0.07 and 0.10kg/（m^3.d）, respectively, simultaneous removal of ammonia and nitrite nitrogen were occurred in 24d in UASB reactor inoculating with mixed sludge consisted of aerobic granular sludge, anaerobic granular sludge, oxidation ditch sludge and nitritation sludge, and TN removal up to 0.99 kg/（m^3.d）was obtained in 186d. At the initial period of start-up, influent concentration of ammonia and nitrite were 20, 30mg/L, and the highest up to 157, 216mg/L. The system could be resumed about 10d when it was inhibited by dissolved oxygen or about 30d by both dissolved oxygen and high nitrite during the start-up. ANAMMOX and denitrification happened simultaneously. The volume of biogas was in direct ratio with TN quantity removed and it could directly and timely indicate the operational state of the system, and what is more, the N2 percent of the biogas was about 99.8%. At the steady period, the pH was incremental but alkalinity was appreciably reduced. The stable simultaneous removal of ammonia and nitrite nitrogen were realized in less than one month and ANAMMOX started up successfully for about 180d through inoculating mixed sludge and low loading rate of ammonia and nitrite nitrogen.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2009年第3期318-324,共7页
China Environmental Science
基金
“十一五”国家科技支撑计划项目(2006BAC19B01)
北京市科技计划项目(D07050601500000)
