磷酸盐对高基质厌氧氨氧化反应器脱氮性能的影响

Effect of phosphate on performance of Anammox process at high substrate

采用模拟废水,在UASB反应器中研究磷酸盐对厌氧氨氧化(Anammox)工艺的长期影响,考察了厌氧氨氧化反应器处理高磷酸盐、高浓度含氮废水的可行性。结果表明:当磷酸盐在进水中的浓度低于750 mg·L^(-1)(25.8 mmol·L^(-1))时,Anammox工艺的脱氮效果较好,且磷酸盐浓度对废水中氮的去除及转化效果影响不大,当磷酸盐浓度增至800 mg·L^(-1)(25.8 mmol·L^(-1))时,Anammox工艺的脱氮性能被抑制,NH+4-N的去除率从96.5%降至74.1%,NO-2-N从97.8%降至75.6%,NRR(nitrogen removal rate)从5.7 kg·(m3·d)-1降至4.4 kg·(m3·d)-1。停止投加磷酸盐后,反应器的脱氮性能得到快速恢复。

To research the feasibility of using an anaerobic ammonium oxidation（ Anammox） process to treat ammonium-rich and phosphate wastewater,an upflow anaerobic sludge blanket（ UASB） reactor was used to study the long-term effects of phosphate on the Anammox process. When the concentration of phosphate was below 750 mg·L^-1（ 24. 2 mmol·L^-1）,the nitrogen removal effect of the Anammox process changed little,even with variation of the phosphate concentration in the influent. However,the nitrogen removal effect of the Anammox process was inhibited significantly,as the phosphate concentration increased to above 800 mg·L^-1（ 25. 8mmol·L^-1）. When the phosphate concentration was 800 mg·L^-1,the removal rates of NH＋4-N and NO-2-N decreased from 96. 5% to 74. 1% and 97. 8% to 75. 6%,respectively,and the nitrogen removal rate decreased from 5. 7 kg·（ m3·d）- 1to 4. 4 kg·（ m3·d）- 1.