用于地表水反硝化的纤维素碳源选择研究
Selection of cellulose carbon sources for biological denitrification of surface water
-
摘要: 为了选取合适的天然有机物作为反硝化细菌碳源用于解决地表水中NO-3-N污染问题，以江南大学校内湖水为接种物，选取8种天然纤维素碳源在缺氧状态不同的处理方式下对60 mg/L NO-3-N的降解特性进行研究。结果表明，以碱处理作为预处理可明显提高反硝化速率，碳源脱氮率均在96%以上（树皮除外）。2种处理方式中均有NO-2-N累积，部分碳源释放NO+4-N并发生DNRA反应，树叶在2种处理中脱氮效果均较好。结合各碳源脱氮率、耗碳源量以及处理成本，选取基本处理的香樟叶作为最佳纤维素碳源。Abstract: In order to select appropriate natural carbon sources for biological denitrification to solve the Nitrate-N pollution of surface water，This paper described the effect of denitrification from eight selected cellulose carbon sources to 60 mg/L Nitrate-N under the anoxic conditions. The experiment was carried out with the campus pond as inoculum in Jiangnan University by basic and alkali two pretreatment methods. The results showed that the cellulose carbon source which was pretreated with alkali had better denitrification rate (up to 96%)， apart from the wooden skin. Nitrite-N accumulation was found in both processes (basic and alkali pretreatment).Ammonium-N，contributed by the release and DNRA process of some carbon sources，was also detected. Leaves were suit for both treatments. Therefore， according to the nitrogen removal rate， consumption of carbon sources and treatment cost，cinnamomum camphor leaf is considered as the best denitrification carbon source in local region.
-
Key words:
- cellulose carbon source /
- biological denitrification /
- surface water
-
-
点击查看大图
计量
- 文章访问数: 2369
- HTML全文浏览数: 954
- PDF下载数: 966
- 施引文献: 0
下载:
