臭氧预氧化对石化污水厂二级出水水质的作用

doi:10.3969/j.issn.0438-1157.2013.09.042

化工学报 ›› 2013, Vol. 64 ›› Issue (9): 3390-3395.DOI: 10.3969/j.issn.0438-1157.2013.09.042

臭氧预氧化对石化污水厂二级出水水质的作用

高祯^1,2, 吴昌永¹, 周岳溪¹, 宋嘉美^1,2, 刘明国^1,3, 常丽君⁴

1. 中国环境科学研究院水污染控制技术研究中心, 北京 100012;
2. 河北工程大学城市建设学院, 河北邯郸 056038;
3. 中国地质大学水资源与环境学院, 北京 100083;
4. 中国石油吉林石化污水处理厂, 吉林省吉林市 132000

收稿日期:2013-01-21 修回日期:2013-04-11 出版日期:2013-09-05 发布日期:2013-09-05
通讯作者: 周岳溪
作者简介:高祯(1988- ),男,硕士研究生。
基金资助:
国家水体污染控制与治理科技重大专项(2012ZX07201-005)。

Effect of pre-ozonation on biological effluent of petrochemical wastewater treatment plant

GAO Zhen^1,2, WU Changyong¹, ZHOU Yuexi¹, SONG Jiamei^1,2, LIU Mingguo^1,3, CHANG Lijun⁴

1. Research Center of Water Pollution Control Technology, Chinese Academy of Environmental Sciences, Beijing 100012, China;
2. School of Urban Construction, Hebei University of Engineering, Handan 056038, Hebei, China;
3. School of Water Resource and Environment, China University of Geosciences, Beijing 100083, China;
4. Jilin Petrochemical Wastewater Treatment Plant, PetroChina Jilin Petrochemical Company, Jilin 132000, Jilin, China

Received:2013-01-21 Revised:2013-04-11 Online:2013-09-05 Published:2013-09-05
Supported by:
supported by the Special S&T Project on Treatment and Control of Water Pollution(2012ZX07201-005).

摘要/Abstract

摘要： 研究了臭氧预氧化对石化企业综合污水处理厂二级出水水质的改善作用,采用分子量分级、气相色谱质谱联用仪、三维荧光扫描等手段对臭氧预氧化前后水质进行了系统分析,并对预处理前后的二级出水采用曝气生物滤池进行了对比处理研究。结果表明,在二级出水平均COD为77.8 mg·L^-1,臭氧投量为10 mg·L^-1,接触时间为4 min的条件下,臭氧预氧化对COD的平均去除率为11.4%,对UV₂₅₄的平均去除率为23.9%。臭氧预氧化能够去除水中含不饱和键以及溶解性微生物产物和腐殖酸类等难降解有机物,改变了废水中有机物的分子结构,使水中分子量小于1×10³的有机物比例从53%提高至67%。预氧化后废水经BAF处理,其COD去除量较二级出水直接经BAF处理提高了14.9%。

关键词: 石化废水, 臭氧, 预氧化, 可生物降解性, 分子量分布

Abstract: Refractory organics are the main composition of residual COD in the effluent of s petrochemical biological wastewater treatment plant.It is the bottleneck in improving water quality with biological methods.The effect of pre-ozonation on a typical petrochemical biological effluent was studied.Molecular weight distribution(MWD),3-D fluorescence scan,gas chromatography-mass spectrometry(GC-MS)were used to analyze water quality before and after pre-ozonation.The removal rates of COD and UV₂₅₄ were 11.4% and 23.9% respectively with an ozone dosage of 10 mg·L^-1 and a duration of 4 min.Pre-ozonation could remove the refractory organics,such as soluble microbial products(SMP)and humic acids,including some unsaturated bond organics.Pre-ozonation changed the MWD of the wastewater,increasing the percentage of small-molecular-weight organics(<1×10³)from 53% to 67%.And it greatly improved the ability of bio-treatment performance of wastewater.Compared with the original biological effluent,COD removal rate of pre-oxidation wastewater treated by the biological aerated filter(BAF)increased by 14.9%.

Key words: petrochemical wastewater, ozone, pre-ozonation, biodegradability, molecular weight distribution

中图分类号:

X703.1

高祯, 吴昌永, 周岳溪, 宋嘉美, 刘明国, 常丽君. 臭氧预氧化对石化污水厂二级出水水质的作用[J]. 化工学报, 2013, 64(9): 3390-3395.

GAO Zhen, WU Changyong, ZHOU Yuexi, SONG Jiamei, LIU Mingguo, CHANG Lijun. Effect of pre-ozonation on biological effluent of petrochemical wastewater treatment plant[J]. CIESC Journal, 2013, 64(9): 3390-3395.

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臭氧预氧化对石化污水厂二级出水水质的作用

Effect of pre-ozonation on biological effluent of petrochemical wastewater treatment plant

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