投加氮源提高臭氧—生物活性炭工艺CODMn去除效果中试研究

Pilot experiment on dosing NH4Cl to improve CODMn removal effects in O3-biological activated carbon process

采用中试研究投加氮源（NH4Cl）提高臭氧生物活性炭工艺去除CODMn的效果。试验结果表明，投加一定量的氮源有利于去除有机物，而过量则无助于去除效果的提高。试验发现，NH4Cl的最佳投加量为0．75mg／L。在最佳投加量下，CODMn总去除率为59．5％，提高了5％左右；生物活性炭对CODMn去除率为36％，提高了6％。

In this paper, adding NH4C1 as nitrogen source in O3-biological activated carbon （BAC） process was studied to improve CODMn removal effects. The results showed： adding certain quantities of NH4Cl would benefit to organic removal, while excessive dosage would not; optimized dosage of NH4Cl was 0. 75 mg/L; with the optimized dosage, the total CODMn removal and CODMn removal in BAC was 59.5% and 36% respectively, increased by 5% and 6% respectively.