聚丁二酸丁二醇酯(PBS)为反硝化固体碳源的脱氮特性研究  

Denitrification Performance of PBS as a Solid Carbon Source of Denitrification

作　　者：刘佳[1,2,3] 沈志强[2,3] 周岳溪[2,3] 曹蓉[1] 李元志[1,2,3] 

机构地区：[1]河北工程大学城市建设学院,邯郸056038 [2]中国环境科学研究院水污染控制技术研究中心,北京100012 [3]中国环境科学研究院环境基准与风险评估国家重点实验室,北京100012

出　　处：《环境科学》2014年第7期2639-2644,共6页Environmental Science

基　　金：国家科技支撑计划项目(2012BAJ21B01-02);中国博士后科学基金项目(2012M520351)

摘　　要：以聚丁二酸丁二醇酯（PBS）为固体碳源和生物膜载体,研究其脱氮性能以及添加惰性载体砾石对反应性能的影响.结果表明,PBS可作为反硝化固体碳源去除低C/N水体中的硝酸盐氮,但是所需的启动时间较长,为33 d左右.反硝化过程不会造成亚硝酸盐氮积累,但是会产生低于0.8 mg·L^-1的氨氮.在PBS为碳源的反硝化体系中添加惰性载体来增加生物膜量,可以提高反硝化速率,PBS、PBS＋30 g砾石、PBS＋60 g砾石、PBS＋90 g砾石4个体系的反硝化速率分别为5.33、7.04、10.05和6.93mg·（L·h）^-1,反应均为零级反应.反硝化反应过程中（0-9 h）,溶解性有机碳（DOC）先升高后降低,反应结束时（24 h）,添加惰性载体砾石60 g和90 g体系的DOC分别为16.34 mg·L^-1和19.22 mg·L^-1,高于未添加砾石体系的13.48 mg·L^-1.4个反硝化体系的pH值均低于初始值,是固体碳源降解过程中产生的酸性物质与反硝化产生的碱度综合作用的结果.Poly-butylenes succinate（ PBS） was used as solid denitrification carbon source and biofilm carrier,to investigate the denitrification performance and the influence of adding inert carrier. The experimental results showed that PBS could serve as solid carbon source for denitrification of low C /N ratio wastewater,but the startup time was longer,about 33 d. There was no accumulation of nitrite nitrogen in the process of denitrification,but it produced less than 0. 8 mg·L^- 1ammonia nitrogen. Increasing the amount of biofilm in PBS supported denitrification system by adding the inert carrier could improve the denitrification rate. The denitrification rates of PBS,PBS ＋ 30 g gravel,PBS ＋ 60 g gravel and PBS ＋ 90 g gravel systems were 5. 33,7. 04,10. 05 and 6. 93 mg·（ L·h）^- 1,respectively,and all reactions were zero order. During the denitrification process（ 0-9 h）,DOC increased before it was reduced. At the end of the denitrification reaction（ 24 h）,DOC of the denitrification system with inert carrier 60 g gravel and 90 g gravel was16. 34 mg·L^- 1and 19. 22 mg·L^- 1,respectively,higher than that without gravel of 13.48 mg·L^- 1. The pH of all denitrification systems were lower than the initial value,which was the result of comprehensive function of acidic substances and alkalinity produced in the process of degradation of solid carbon source and denitrification,respectively.

关 键 词：聚丁二酸丁二醇酯 固体碳源 硝酸盐 反硝化 惰性载体 

分 类 号：X703.1[环境科学与工程—环境工程]