微波-活性炭法处理氨氮废水的研究

目的]探讨微波-活性炭法处理氨氮废水的可行性及最佳试验条件。方法]以模拟氨氮废水为处理对象,研究了活性炭存在条件下,溶液pH、空气通入状况、活性炭投加量、微波作用功率和时间对微波辐射下氨氮废水去除效果的影响。结果]微波-活性炭法对氨氮具有较好的去除作用,向溶液中通入空气,也能在一定程度上提高氨氮的去除率;提高溶液pH,增大微波作用功率、延长微波处理时间均能提高氨氮的去除率,而活性炭用量对氨氮去除效果的影响不显著;微波-活性炭联合技术法用来处理氨氮废水有很好的可行性,正交试验结果表明,活性炭投加量为0.5 g,pH=11,微波功率为850 W,处理时间4 min时,氨氮去除率可达92.47%。结论]该研究为氨氮废水的处理提供了一种新的方法,即微波-活性炭法。

Study on the Removal of Ammonia Nitrogen from Wastewater Using Microwave Coupled with Active Carbon

Objective] The study aimed to discuss the feasibility and optimal conditions of removing ammonia nitrogen by using microwave coupled with active carbon.Method] In the study,a novel process,microwave radiation coupled with active carbon,was applied to remove ammonia nitrogen from wastewater,and the effects of solution pH,air conditions,active carbon usage,microwave power and time on ammonia nitrogen removal were studied.Result] Microwave coupled with active carbon can remove ammonia nitrogen efficiently,and pumping air into the wastewater can also increase the removal rate of ammonia nitrogen to a certain extent.Higher pH,intensive microwave power and longer treating time could also increase the removal rate of ammonia nitrogen using microwave radiation coupled with active carbon,whereas the usage of active carbon contributed a small impact.It was proved that microwave coupled with active carbon was an effective method for the removal of ammonia nitrogen from wastewater.Meanwhile,orthogonal experiments results showed that the removal rate of ammonia nitrogen reached 92.5% under the optimal conditions,that is,active carbon usage was 0.5 g,pH=11,microwave power was 850 W,and microwave time was 4 minutes.Conclusion] The research provided a new method to remove ammonia nitrogen from wastewater,namely microwave coupled with active carbon.