O_(3)-SBBR联合工艺深度处理印染工业园生化尾水的效能和机制  

Efficiency and Mechanism of O_(3)-SBBR Combined Process for Advanced Treatment of Biochemical Effluent from Printing and Dyeing Industrial Park

作　　者：罗新浩 胡勇有 陈元彩[1,2] 程建华 姚颖 钱原铬[3] LUO Xin-hao;HU Yong-you;CHEN Yuan-cai;CHENG Jian-hua;YAO Ying;QIAN Yuan-ge(School of Environment and Energy,South China University of Technology,Guangzhou 510006,China;Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters,Ministry of Education,Guangzhou 510006,China;Foshan City Jialida Environmental Protection Technology Corp.,Foshan 528143,China)

机构地区：[1]华南理工大学环境与能源学院,广州510006 [2]工业聚集区污染控制与生态修复教育部重点实验室,广州510006 [3]佛山市佳利达环保科技股份有限公司,佛山528143

出　　处：《环境科学》2023年第2期878-888,共11页Environmental Science

摘　　要：针对印染工业园生化尾水中生物难降解的有机氮难题,采用O_(3)-SBBR(臭氧-序批式生物膜反应器)联合工艺进行深度处理.开展了影响因素实验、降解动力学和淬灭实验,测定了自由基种类、琥珀酸脱氢酶活性和脱氮功能基因.结果表明,适宜的臭氧氧化条件:pH为8.0~8.5、ρ(O_(3))为35.0 mg·L^(-1)左右、 O_(3)投加量(以O_(3)/H_(2)O计,下同)约为100.0 mg·L^(-1)和反应时间为90.0~120.0 min.臭氧氧化生化尾水的有机氮符合拟一级动力学模型,最大速率常数k值为0.010 35 min^(-1)[实验条件:pH为8.0、 O_(3)投加量为150.0 mg·L^(-1)和ρ(O_(3))为35.0 mg·L^(-1)].臭氧氧化显著提高序批式生物膜反应器(SBBR)的脱氮性能,脱氮效率从19.8%(SBBR)提高到32.9%(O_(3)-SBBR).臭氧氧化将毒性强、生物难利用的有机氮及有机物转化为低毒、可生化的小分子物质.O_(3)-SBBR联合工艺中各功能基因(nirS、nirK和nor)的丰度较单一SBBR中有大幅提升,进一步证实臭氧氧化能提高SBBR的脱氮性能.联合工艺的运行费用0.74~1.07元·m^(-3),技术经济性较好.研究结果为O_(3)-SBBR联合工艺深度处理印染工业园生化尾水的应用提供了依据.With the aim of addressing the difficult problem of biodegradable organic nitrogen in biochemical effluent of a printing and dyeing industrial park,the combined ozonation-sequencing batch biofilm reactor(O_(3)-SBBR) process was used for advanced treatment.The influencing factors and degradation kinetics were analyzed;quenching experiments were carried out;and the types of free radicals,succinate dehydrogenase activity,and denitrification function genes were determined.The results showed that the suitable ozonation condition was pH 8.0-8.5,O_(3) concentration was approximately 35.0 mg·L^(-1),O_(3) dosage was approximately 100.0 mg·L^(-1),and reaction time was 90.0-120.0 min.Organic nitrogen in the biochemical effluent by ozonation conformed to the pseudo first-order kinetic model,and the maximum rate constant k was 0.010 35 min^(-1)(experimental conditions:pH 8.0,ozone dosage 150.0 mg·L^(-1),and ozone concentration 35.0 mg·L^(-1)).Ozonation significantly improved the denitrification performance of the sequencing biofilm batch reactor(SBBR),and the denitrification efficiency increased from 19.8%(SBBR) to 32.9%(O_(3)-SBBR).Ozonation could convert organic nitrogen and organic substances with strong toxicity and difficult biological utilization into small molecular substances with low toxicity and biodegradability.The abundance of functional genes(nirS,nirK,and nor) in the O_(3)-SBBR combined process was significantly higher than that in the single SBBR,which further confirmed that ozonation could improve the nitrogen removal performance of SBBR.The operation cost of the combined process was 0.74-1.07 yuan·m^(-3),with good technical economy.This study provided a basis for the application of the O_(3)-SBBR combined process in the advanced treatment of biochemical effluent in printing and dyeing industrial parks.

关 键 词：印染废水 脱氮 臭氧氧化 序批式生物膜反应器(SBBR) 有机氮 

分 类 号：X703.1[环境科学与工程—环境工程]