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不同温度下应用比值控制实现连续流好氧颗粒污泥短程硝化

本站小编 Free考研考试/2021-12-31

中文关键词低温短程硝化好氧颗粒污泥连续流比值控制 英文关键词low temperaturepartial nitritationaerobic granular sludgecontinuous-flowratio control
作者单位E-mail
梁东博北京工业大学建筑工程学院, 城市污水深度处理与资源化利用技术国家工程实验室, 北京 100124bjutliangdongbo@163.com
卞伟北京工业大学建筑工程学院, 城市污水深度处理与资源化利用技术国家工程实验室, 北京 100124
阚睿哲北京市城规技术服务中心, 北京 100045
王文啸北京工业大学建筑工程学院, 城市污水深度处理与资源化利用技术国家工程实验室, 北京 100124
赵青北京工业大学建筑工程学院, 城市污水深度处理与资源化利用技术国家工程实验室, 北京 100124
孙艺齐北京工业大学建筑工程学院, 城市污水深度处理与资源化利用技术国家工程实验室, 北京 100124
李军北京工业大学建筑工程学院, 城市污水深度处理与资源化利用技术国家工程实验室, 北京 100124jglijun@bjut.edu.cn
中文摘要 在连续流反应器中接种成熟好氧颗粒污泥(AGS)处理低氨氮污水,通过控制溶解氧(DO)和出水氨氮(NH4+-N)的浓度,研究了控制DO/NH4+-N(R值)实现连续流好氧颗粒污泥系统短程硝化的可行性和不同温度(30、20、10℃)条件下实现短程硝化系统对R值的需求.结果表明,通过比值控制,连续流好氧颗粒污泥系统可以快速实现短程硝化;在30、20、10℃条件下,系统实现短程硝化所需要的R值分别为0.50(±0.05)、0.35(±0.03)和0.20(±0.02).因此可知,温度越低,系统实现短程硝化所需要的氧抑制越强.采用荧光原位杂交(fluorescence in situ hybridization,FISH)实验表明,通过比值控制,氨氧化菌(AOB)得到一定的富集,而亚硝酸盐氧化菌(NOB)的相对数量逐渐减少.基于比值控制和污水水质的特点,选择短程硝化的方式有所不同,低氨氮废水选择半量亚硝化,而高氨氮污水则选择全量亚硝化. 英文摘要 Mature aerobic granular sludge (AGS) was inoculated in a continuous-flow reactor to treat low ammonia sewage, and the feasibility of achieving partial nitritation in a continuous-flow aerobic sludge system and the demand for R value (the ratio of dissolved oxygen and ammonia nitrogen) when partial nitritation is achieved at different temperatures (30, 20, and 10℃) were investigated. The control strategy was designed to maintain a constant ratio between dissolved oxygen (DO) and ammonia nitrogen (NH4+-N). The results revealed that stable nitritation in a continuous-flow aerobic sludge reactor could be achieved via ratio control, and the value of R were 0.50 (±0.05), 0.35 (±0.03), and 0.20 (±0.02) at the temperatures 30, 20, and 10℃, respectively, from which it can be concluded that stronger oxygen-limiting conditions were required when the temperature was lower. The experiment of fluorescence in situ hybridization (FISH) revealed that ammonia oxidizing bacteria (AOB) have a certain concentration, and the relative number of nitrite oxidizing bacteria (NOB) gradually reduced through the ratio control strategy. Based on the ratio control strategy and the characteristics of wastewater quality, full nitritation of high ammonia wastewater may be allowed; however, for low ammonia wastewater, only partial nitritation is recommended.

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