Abstract:

Rice husk，corn cob and old rice have been used respectively as additional carbon source for investigating the effect of different carbon sources on low C/N wastewater denitrification. The results show that rice husk and corn cob has significant removing effect on NH3-N，whose removing rates are 0-93.33% and 6.9%-91.75%，respectively.After adding old rice，the NH3-N in effluent is higher than that in raw water. The TN removing effect of rice husk and corn cob by the reaction system is instable，whose removal rates are -28.36%-42.79% and -14.93%-58%，re- spectively. However，after adding old rice，the removing efficacy of TN is significant. The range of effluent TN con-centrations is 0.69-10.8 mg/L，and the removing rates of TN is 33.43%- 93.37%. From the aspects of denitrification efficiency and costs，old rice is more suitable for being used as denitrification carbon source.Key words： low C/N；denitrification；sustained-release carbon source

Key words: low C/N, denitrification, sustained-release carbon source

摘要：

分别采用稻壳、玉米芯和陈米作为外加碳源,研究不同碳源对低碳氮比污水反硝化的影响。结果表明:稻壳和玉米芯对NH3-N的去除效果显著,去除率分别为0~93.33%和6.9%~91.75%;投加陈米后,出水NH3-N比原水有所增加。投加稻壳和玉米蕊时,反应体系对TN的去除效果不稳定,去除率为-28.36%~42.79%和-14.93%~58%;而投加陈米后,对TN的去除效果显著,出水TN范围为0.69~10.8 mg/L,去除率为33.43%~93.37%。从反硝化效率和成本方面看,陈米更适于作为反硝化脱氮的碳源。

关键词: 低碳氮比, 反硝化, 缓释碳源

CLC Number: 

• X703