碱度对SBR中氨氮硝化的影响

对比试验的进水总氮约２００ｍｇ／Ｌ，当进水碱度为１０００ｍｇ／Ｌ左右时，达到１００％的氨氮去除，出水中存在剩余碱度，ｐＨ在６．８以上；当进水碱度为６００ｍｇ／Ｌ左右时，氨氮去除只达到８３％左右，出水中碱度耗尽，ｐＨ在５左右。试验并对一次操作过程进行了跟踪测试，测试指标有ＣＯＤ，ＮＨ３，ＮＯ２＾－，ＮＯ３＾－，碱度和ｐＨ。在碱度耗尽时，氨氮向亚硝酸盐氮的转化被抑制，但亚硝酸盐氮向硝酸盐氮的转化仍在进

Effect of Alkalinity on Ammonia Nitrification in SBR

Under the condition of influent with concentration of total N about 200 mg/La comparison experiment is made. When the alkalinity of the influent is about 1 000 mg/L,the removal of ammonia of effluent is up to 100%,the alkalinity of effluent exists and pH is above 6.8.When the alkalinity of the influent is about 600 mg/L,the removal of ammonia of effluent is only 83%or so,the alkalinity of effluent is exhausted and pH is about 5.A tracing measurement for one operational cycle is made too. The parameters of tracing measurement are COD,ammoina,nitrite,nitrate, alkalinity and pH. When the alkalinity is exhausted,the progress of change of ammonla to nitrite stops,while the progress of change of nitrite to nitrate continues until it is completed.