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不同改性方式对控释碳源材料脱氮性能的影响

Keywords: 改性,脱氮,循环冷冻解冻,化学交联,DRNA

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Abstract:

以玉米淀粉(S)为碳源,聚乙烯醇(P)为骨架载体,根据是否用硼酸(B)和硫酸钠(N)做改性处理,制备了GSP、GSP-N、GSP-B和GSP-BN4种控释碳源材料,研究N、B和BN3种改性方式对碳源材料脱氮性能的影响。在添加4种碳源的静态实验中,硝酸盐氮去除率均在96.1%以上。碳源材料的改性对硝酸盐氮的降解情况影响不明显,但对脱氮过程中TOC、亚硝酸盐氮、氨氮和TN浓度的变化有不同程度的影响。以TOC、亚硝酸盐氮、氨氮和TN为指标,N、BN和B3种改性方式综合效益指数分别为5.62、4.6和1.92,硫酸钠(N)改性处理对提高控释碳源材料整体性能具有最佳效果。

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