固相碳源的制备及其释放能力探究

Research on the Preparation and the Release Ability of Solid Carbon Source

碳源作为反硝化过程的电子供体,是影响反硝化过程的重要因素。通常每去除1mg的N需要消耗6~8mg的COD。由于人工湿地的碳源主要来源于进水,但是进水中溶解有机碳浓度较低,且大多为难溶有机碳,故考虑添加外来碳源作为反硝化过程的电子供体。出于对水力停留时间和去除率的考虑,决定采用固相碳源。通过比较常用的碳源不同配比和聚乙烯醇的不同含量,寻找合适的碳源配比和稳定的碳源供体。固相碳源既能有效减小水力停留时间,又能保证提供充足的碳源,材料简单易得,价格低廉,具有广阔的应用前景。

As denitrification process of electronic donor,carbon source is the main factors of denitrification process in artificial wetland.Six to eight mgs of COD were consumed while 1 mg of N was removed,normally.Because carbon source of artificial wetland mainly comes from influent,however,because the water soluble organic carbon concentration is very low,and almost difficult degradable organic carbon,therefore,using external carbon source to provide denitrifying electronic donor is needed.Considering HRT and removal rate,solid carbon source is used.Comparing different matching of common carbon source and the proportion of vinol,the matching of common carbon source and stable electronic donor was examined.Solid carbon source can get easily and the price is economic,which would deduce HRT and has a broad prospect of application.