The component analysis of filter cake on membrane surface showed that metallic membrane played a very important role in TN removal by retaining macromolecular soluble and colloid compounds.

膜表面滤饼成分分析表明，除了生物去除之外，通过截留大分子溶解性和胶体含氮化合物，金属膜在脱氮方面发挥重要作用。

The results showed that the removal rate of TN and TP increase with the increase of wastewater concentration.

结果表明，TN、TP的去除率随污水浓度升高而升高，水培液中TN、TP浓度随污水浓度升高而降低。

Meanwhile, efforts should be made to improve the removal of TN and TP.

但总氮和总磷的去除效果还有待进一步提高。