不同碳/氮(C/N)植物体去除废水中氮效果研究

 将枯柳枝、银杏叶、水杉叶、枯竹竿、梧桐叶和枯葡萄藤等6种不同碳/氮(C/N)值含量的植物体浸泡在生活污水中，并测定其对生活污水中氮(N)和磷(P)含量的影响。研究结果表明，除银杏叶外，其余5种植物均有不同的除N能力，其中枯柳枝的除N效果最好，能在40 d内将污水中的总氮(TN)含量从11.09 mg/L降到0.48 mg/L，去除率为95.67%，去除效果最差的水杉叶也可将污水中的TN含量从11.09 mg/L降到1.39 mg/L，去除率为87.47%。所选6种植物均无除P能力，并且在浸泡过程中均有P释放致使污水中P含量升高。

Effect of Removing Nitrogen in Plant bodies with different C/N ratios

Six sorts of plants,i.e.,willow branches,gingkgo leaves,bamboos,grapevines,cotoier leaves and metasequoia leaves,were immersed into sewage,and then,the TN and TP content in the sewage were measured.The test results show as follows: All of the five sorts of plants except gingkgo leaves possess the ability to remove N from sewage.The willow branches have the best effect among them,can reduce the TN from 11.09 mg/L to 0.48 mg/L,and its desewerage rate is 95.67%;the worst effect is metasequoia leaves,it only can reduce the TN from 11.09 mg/L to 1.39 mg/L and the desewerage rate is 87.47%.But all of these six sorts of plants con not remove P from sewage,on the contrary,would release P into sewage and then cause the increase of P content in the sewage.