三级厌氧氨氧化处理生活污水与硝酸盐废水

为进一步充分利用原水中碳源,实现生活污水与富含硝酸盐的工业废水同步脱氮,采用2个SBR和1个UASB串联,处理低C/N生活污水和硝酸盐废水,分别启动内源反硝化反应器(ED-SBR)、半短程硝化反应器(PN-SBR)和厌氧氨氧化反应器(AMX-UASB),考察各反应器处理性能,并探讨生活污水与硝酸盐废水同步脱氮的可行性....

Simultaneous removal of domestic wastewater and nitrate wastewater by three-stage anammox system

To further utilize carbon source, endogenous denitrification reactor (ED-SBR)、partial nitrification reactor (PN-SBR) and anammox reactor (AMX-UASB) were used to treat low C/N domestic wastewater and industrial wastewater rich in nitrate. The feasibility of simultaneous denitrification of domestic wastewater and nitrate wastewater was discussed. 77.5% of the organic matter in the influent could be converted into internal carbon source in the ED-SBR anaerobic stage, and endogenous denitrification was carried out in the anoxic stage. The average NO₃^--N concentration in the effluent was 3.4mg/L, reaching an average removal rate of 90.4%; PN-SBR can achieve stable half shortcut nitrification under low do (0.1~0.3mg/L), Nitrite Accumulation Ratio (NAR) is 96.3%, and the ratio of NO₂^--N/NH₄⁺-N in effluent is about 1.01, which can provide stable substrate for anammox; AMX-UASB reduces NH₄⁺-N and NO₂^--N in influent is converted to N₂ and NO₃^--N. The average effluent of NO₃^--N was 7.12mg/L. The average TIN concentration of inlet and outlet water was 77.5 and 8.2mg/L respectively, and the average TIN removal rate was 89.2%. In order to couple domestic sewage with high NO₃^--N content, providing an effective way to remove nitrogen from wastewater simultaneously.