人工土层降解废水中氨氮的试验研究

Experimental study on ammonia nitrogen degradation in wastewater of artificial soil layer

氮在水体中过多地存在,会成为对人类有危害作用的污染因子。就土壤渗滤法去除硝酸铵水溶液中的氨氮、硝酸盐的效能与机理方面进行了初步探讨。人工土层下部填加活性炭不需要驯化过程,便可有效地降解氨氮、硝酸盐氮。下部填加豆石的土壤渗滤柱须经过驯化,才能有效地降解氨氮,但不能去除硝酸盐氮。下部填加活性炭与下部填加豆石的土壤渗滤柱,经过22d的驯化过程之后,亚硝酸盐氮均可降至0.1mg/L以下。

The excessive existence of nitrogen in water become a pollution factor causing harmful effect on human beings.The efficiency and mechanism of ammonia nitrogen and nitrate removal from ammonium nitrate solution by soil infiltration method were discussed.The addition of activated carbon in lower part of artificial soil layer can effectively degrade ammonia nitrogen and nitrate nitrogen without domestication process.The soil percolation column with pisolith in lower part must be domesticated to effectively degrade ammonia nitrogen,which can not remove nitrate nitrogen.The nitrite nitrogen of soil percolation column can be reduced to less than 0.1 mg/L after 22 dof domestication？process,which are filled with activated carbon and pisolith at the lower part of the soil.