稻草强化生物膜浮床脱除工业尾水中氮素及COD的效果

doi:10.11988/ckyyb.20190521

长江科学院院报 ›› 2020, Vol. 37 ›› Issue (9): 13-17.DOI: 10.11988/ckyyb.20190521

稻草强化生物膜浮床脱除工业尾水中氮素及COD的效果

艾森^1,2, 杨亚红¹, 许光链^2,3, 宰英涵^2,4, 张惠宁¹, 白志辉²

1.兰州理工大学土木工程学院,兰州 730050;
2.中国科学院生态环境研究中心,北京 100085;
3.集美大学水产学院,福建厦门 361021;
4.天津工业大学环境科学与工程学院,天津 300387

收稿日期:2019-05-06 修回日期:2019-07-15 出版日期:2020-09-01 发布日期:2020-09-25
通讯作者: 杨亚红(1976-),女,陕西宝鸡人,副教授,博士,主要从事水污染控制过程及其新技术研究。E-mail:yangyahong@lut.cn
作者简介:艾森(1993-),男,河南平顶山人,博士研究生,主要从事污水生物处理研究。E-mail:2295541195@qq.com
基金资助:
国家水体污染控制与治理科技重大专项课题(2104ZX07204-005,2015ZX07203-007)

Removal of Total Nitrogen and COD from Industrial Tail Water by Biofilm Floating Bed Strengthened with Rice Straw

AI Sen^1,2, YANG YA-hong¹, XU Guang-lian^2,3, ZAI Ying-han^2,4, ZHANG Hui-ning¹, BAI Zhi-hui²

1. School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China;
2. Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;
3. Fisheries College of Jimei University, Xiamen 361021, China;
4. School of Environmental Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China

Received:2019-05-06 Revised:2019-07-15 Online:2020-09-01 Published:2020-09-25

摘要/Abstract

摘要： 工业污水处理厂排放的尾水中总氮含量偏高,容易引起地表水体的富营养化。为了提高尾水中总氮的去除效率,通过模拟稳定塘静态和动态试验,对比了不同稻草添加量(0,0.18,0.54 g/L)强化生物膜浮床脱除工业尾水中总氮(TN)的效果。静态试验结果表明:随着稻草量的增加,TN的去除率显著提高;10 d后,添加0(CK)、0.18 g/L(T1)和0.54 g/L(T2)稻草的尾水中,TN去除率分别为18%,40%,93%。动态试验结果显示,水力停留时间(HRT)为 4 d时,CK、T1和T2的平均TN去除率分别为10%,22%,49%,且3种情况下的进出水COD浓度无显著差异。这主要是由于稻草通过缓慢释放碳源为生物膜中异养反硝化细菌提供可利用的有机物。研究成果可为工业尾水深度处理脱氮技术提供参考。

关键词: 工业尾水, 稻草, 生物膜, 生态浮床, 总氮, COD

Abstract: Large content of total nitrogen (TN) in the tail water discharged from industrial wastewater treatment plant is likely to cause eutrophication in surface water. In order to improve the removal efficiency of TN in the tail water, we investigated into the removal rate of TN by biofilm floating bed strengthened with different amounts of rice straw (0, 0.18 g/L, and 0.54 g/L) by simulated static and dynamic stabilization pond experiment. Static experiment result showed that the removal rate of TN increased significantly along with the increment of rice straw amount; after 10 days, the removal rate of TN was respectively 18%, 40%, and 93% when 0 (CK), 0.18 g/L (T1), and 0.54 g/L (T2) rice straw were added into the floating bed. Dynamic experiment result revealed that the mean TN removal rate of CK, T1 and T2 was respectively 10%, 22%, and 49% when the hydraulic retention time (HRT) was 4 d; no significant difference was found in COD concentration in the influent and effluent under the three conditions due to the fact that rice straw provides organic matter for heterotrophic denitrifying bacteria in biofilms by slowly releasing carbon source.

Key words: industrial tail water, rice straw, biofilm, floating bed, total nitrogen, COD

中图分类号:

X522

艾森, 杨亚红, 许光链, 宰英涵, 张惠宁, 白志辉. 稻草强化生物膜浮床脱除工业尾水中氮素及COD的效果[J]. 长江科学院院报, 2020, 37(9): 13-17.

AI Sen, YANG YA-hong, XU Guang-lian, ZAI Ying-han, ZHANG Hui-ning, BAI Zhi-hui. Removal of Total Nitrogen and COD from Industrial Tail Water by Biofilm Floating Bed Strengthened with Rice Straw[J]. JOURNAL OF YANGTZE RIVER SCIENTIFIC RESEARCH INSTI, 2020, 37(9): 13-17.

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稻草强化生物膜浮床脱除工业尾水中氮素及COD的效果

Removal of Total Nitrogen and COD from Industrial Tail Water by Biofilm Floating Bed Strengthened with Rice Straw

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