可生物降解聚合物在低碳氮质量比含盐废水脱氮处理中的应用研究
|
摘要
利用可生物降解多聚物(BDPs)材料固体颗粒作为反硝化过程的碳源和生物膜载体,进行低碳氮质量浓度比含盐废水的生物脱氮研究,考察碳源、温度、停留时间对反硝化脱氮效果的影响及使用前后可生物降解多聚物颗粒的变化。结果表明,实验条件下,可生物降解多聚物材料颗粒可以作为碳源使用,总氮去除率大于90%;温度对反硝化脱氮影响较大,15℃时的反硝化速率较25℃时降低30%;使用前后固体颗粒质量和表面均发生较大变化,证明其可作为碳源被生物利用。
The research on biological denitrification of low C/N mass ratio and salinity wastewater is carried out.Biodegradable polymer(BDPs) is used as the carbon source of the denitrification process and the carrier of the biofilm. The effects of carbon source, temperature, and residence time on denitrification effects are studied, and the changes of the BDPs during the experiment is also investigated. The results demonstrate that BDPs can be used as the carbon source, and the removal efficiency of TN reached higher than 90%. Moreover, temperature plays an important role in the denitrification process. The denitrification rate decreases by 30% when the temperature decreases from 25 ℃ to 15 ℃. In addition, the weight and surface morphology of BDPs are obviously changed after use, indicating that BDPs can be consumed by microorganism as a carbon source.
The research on biological denitrification of low C/N mass ratio and salinity wastewater is carried out.Biodegradable polymer(BDPs) is used as the carbon source of the denitrification process and the carrier of the biofilm. The effects of carbon source, temperature, and residence time on denitrification effects are studied, and the changes of the BDPs during the experiment is also investigated. The results demonstrate that BDPs can be used as the carbon source, and the removal efficiency of TN reached higher than 90%. Moreover, temperature plays an important role in the denitrification process. The denitrification rate decreases by 30% when the temperature decreases from 25 ℃ to 15 ℃. In addition, the weight and surface morphology of BDPs are obviously changed after use, indicating that BDPs can be consumed by microorganism as a carbon source.
引文
[1]周少奇,方汉平.低COD/N-NH4+比废水的同时硝化反硝化生物处理策略[J].环境污染与防治,2000,22(1):18-21.
[2]李争义.膜生物反应器处理酱油废水的研究与应用[D].广州:华南理工大学,2011:19.
[3]李晔,章旻,陈家宏,等.污水反硝化脱氮的固态有机碳源选择实验研究[J].武汉理工大学学报,2010,32(6):27-31.
[4]乔森,刘雪洁,周集体,等.异养硝化-好氧反硝化在生物脱氮方面的研究进展[J].安全与环境学报,2014,14(2):128-135.
[5]周海红,王建龙,赵璇. pH对以PBS为反硝化碳源和生物膜载体去除饮用水源水中硝酸盐的影响[J].环境科学,2006,27(2):290-293.
[6]修海峰,朱仲元,丁爱中,等.好氧反硝化菌种DF2的分离鉴定及生理生化特性分析[J].生态环境学报,2011,20(8-9):1307-1314.
[7] WELANDER U, MATTIASSON B. Denitrification at low temperatures using a suspended carrier biofilm process[J]. Wat Res,2003,37(10):2394-2398.
[8]陈云峰,文辉,张彦辉.不同固态碳源用于反硝化去除污水处理厂尾水中硝态氮的研究[J].给水排水,2010,36(11):140-143.
[2]李争义.膜生物反应器处理酱油废水的研究与应用[D].广州:华南理工大学,2011:19.
[3]李晔,章旻,陈家宏,等.污水反硝化脱氮的固态有机碳源选择实验研究[J].武汉理工大学学报,2010,32(6):27-31.
[4]乔森,刘雪洁,周集体,等.异养硝化-好氧反硝化在生物脱氮方面的研究进展[J].安全与环境学报,2014,14(2):128-135.
[5]周海红,王建龙,赵璇. pH对以PBS为反硝化碳源和生物膜载体去除饮用水源水中硝酸盐的影响[J].环境科学,2006,27(2):290-293.
[6]修海峰,朱仲元,丁爱中,等.好氧反硝化菌种DF2的分离鉴定及生理生化特性分析[J].生态环境学报,2011,20(8-9):1307-1314.
[7] WELANDER U, MATTIASSON B. Denitrification at low temperatures using a suspended carrier biofilm process[J]. Wat Res,2003,37(10):2394-2398.
[8]陈云峰,文辉,张彦辉.不同固态碳源用于反硝化去除污水处理厂尾水中硝态氮的研究[J].给水排水,2010,36(11):140-143.