Liu Hong, Nan Yan-Bin, Li Hui, Wang Xiang, Peng Yong-Zhen, Chen Yong-Zhi
School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China.
National Engineering Laboratory of Urban Sewage Advanced Treatment and Resource Utilization Technology, Beijing University of Technology, Beijing 100124, China.
Huan Jing Ke Xue. 2018 Feb 8;39(2):865-871. doi: 10.13227/j.hjkx.201707029.
Shortcut nitrification sludge, which was set aside for two months, was recovered using Reactors Ⅰ, Ⅱ, Ⅲ, and Ⅳ. The aeration rates of Reactors Ⅰ, Ⅱ, Ⅲ, and Ⅳ were 120, 100, 80, and 60 L·h, respectively, while treating real domestic sewage, and the ratio of aerobic/anoxic was 30 min/30 min at the temperature of 25℃. The influent of ammonia was 50-80 mg·L, and the concentration of effluent ammonia was stable, at below 5 mg·L, after the 12, 18, 21, and 21 cycles. The removal ratio of ammonia nitrogen was about 95%. The highest concentrations of nitrite for Reactors Ⅰ, Ⅱ, Ⅲ, and Ⅳ were 20.83, 22.81, 21.50, and 20.73 mg·L, respectively, which occurred in the 30, 35, 38, and 42 cycles, respectively. The concentrations of effluent nitrate were lower than 0.5 mg·L, and the nitrite accumulation rates were higher than 99%. The activity of ammonia-oxidizing bacteria (AOB) increased gradually and finally stabilized at 100.00%; however, the activity of nitrite-oxidizing bacteria (NOB) was gradually inhibited. The recovery of shortcut nitrification was achieved successfully in the different aeration modes.
将存放两个月的短程硝化污泥，通过反应器Ⅰ、Ⅱ、Ⅲ和Ⅳ进行恢复。在处理实际生活污水时，反应器Ⅰ、Ⅱ、Ⅲ和Ⅳ的曝气速率分别为120、100、80和60 L·h，在25℃的温度下，好氧/缺氧比为30分钟/30分钟。进水氨氮为50 - 80 mg·L，经过12、18、21和21个周期后，出水氨氮浓度稳定在5 mg·L以下。氨氮去除率约为95%。反应器Ⅰ、Ⅱ、Ⅲ和Ⅳ的亚硝酸盐最高浓度分别为20.83、22.81、21.50和20.73 mg·L，分别出现在第30、35、38和42个周期。出水硝酸盐浓度低于0.5 mg·L，亚硝酸盐积累率高于99%。氨氧化细菌（AOB）的活性逐渐增加，最终稳定在100.00%；然而，亚硝酸盐氧化细菌（NOB）的活性受到逐渐抑制。在不同曝气模式下成功实现了短程硝化的恢复。
