预臭氧化过程水样可生化性的简易评估方法

doi:10.3969/j.issn.0438-1157.2014.06.050

化工学报 ›› 2014, Vol. 65 ›› Issue (6): 2323-2328.DOI: 10.3969/j.issn.0438-1157.2014.06.050

预臭氧化过程水样可生化性的简易评估方法

高燕, 陈尧, 倪金雷, 童少平, 马淳安

浙江工业大学化学工程与材料学院, 绿色化学合成技术国家重点实验室培育基地, 浙江杭州 310032

收稿日期:2013-08-29 修回日期:2013-11-01 出版日期:2014-06-05 发布日期:2014-06-05
通讯作者: 童少平
作者简介:高燕（1988- ），女，硕士研究生
基金资助:
国家自然科学基金项目（21176225）；浙江省重大科技专项（2013C03019）。

A simple method for evaluating biodegradability of pre-ozonized water

GAO Yan, CHEN Yao, NI Jinlei, TONG Shaoping, MA Chun'an

College of Chemical Engineering and Materials Science, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310032, Zhejiang, China

Received:2013-08-29 Revised:2013-11-01 Online:2014-06-05 Published:2014-06-05
Supported by:
supported by the National Natural Science Foundation of China (21176225) and the Special Major Project of Science and Technology of Zhejiang Province(2013C03019).

摘要/Abstract

摘要： 研究了几种生化难降解有机物在预臭氧化过程可生化性（BOD₅/COD_Cr，即5天生化需氧量与化学耗氧量的比值）的变化情况，并提出了一个氧化度（即有机物的氧化程度，定义为：（4TOC-COD_Cr）/4TOC，其中TOC为总有机碳）的概念。结果表明，在预臭氧化硝基苯、邻苯二甲酸二甲酯和磺基水杨酸模拟水样过程中，水样的氧化度和可生化性均有不同程度的提升，而且两者存在一定的正相关性。当体系氧化度大于0.65时，水样的BOD₅/COD_Cr一般均在0.2以上，可直接进行生化处理。对某酸性化工废水进行了预臭氧化处理（Ti（Ⅳ）/H₂O₂/O₃），120 min后COD_Cr和TOC的去除率分别达到了66.09%和34.09%，此时水样的氧化度从原来的0.346升至0.664，BOD₅/COD_Cr值从原来的0.05升至0.332，显示了较好的正相关性。利用易测的氧化度来预判水样的可生化性，这对推广预臭氧化技术在实际难降解废水处理中的应用具有重要的实际意义。

关键词: 臭氧, 降解, 氧化, 废水, 氧化度, 可生化性, 有机污染物

Abstract: After studying changes of biodegradability (BOD₅/COD_Cr, the ratio of biochemical oxygen demand after 5 days to chemical oxygen demand) of several refractory organic compounds before and after pre-ozonation a oxidative degree conception of organic compound, defined as (4TOC-COD_Cr)/4TOC, in which TOC refers to total organic carbon, has been put forward. The results show that after pre-ozonation the oxidative degrees and biodegradability of nitrobenzene, 1,2-dimethyl phthalate and sulfosalicylic acid solutions all increases, and that there is a positive correlation between the sample's oxidative degree and their biodegradability. The BOD₅/COD_Cr values of the samples can be more than 0.2 when its oxidative degrees are greater than 0.65, showing that these samples can be directly treated by biological treatment. The results of pre-treating acidic chemical wastewater by an advanced ozone-based oxidative process (Ti(Ⅳ)/H₂O₂/O₃) show that the removal rates of COD_Cr and TOC were 66.09% and 34.09% after 120 min, respectively, and that the oxidative degree and BOD₅/COD_Cr value of the acidic chemical wastewater increased from initial 0.346 and 0.05 to 0.664 and 0.332, respectively. There also is a good positive correlation between the oxidative degree and the BOD₅/COD_Cr value. The results mentioned above indicate that the oxidative degree value can probably be used to evaluate the biodegradability of wastewater. Due to the determination of the oxidative degree is simple and fast, it will be of significance for common application of ozonation technology in pre-treatment of refractory wastewater.

Key words: ozone, degradation, oxidation, waste water, oxidative degree, biodegradability, organic pollutant

中图分类号:

X703

高燕, 陈尧, 倪金雷, 童少平, 马淳安. 预臭氧化过程水样可生化性的简易评估方法[J]. 化工学报, 2014, 65(6): 2323-2328.

GAO Yan, CHEN Yao, NI Jinlei, TONG Shaoping, MA Chun'an. A simple method for evaluating biodegradability of pre-ozonized water[J]. CIESC Journal, 2014, 65(6): 2323-2328.

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预臭氧化过程水样可生化性的简易评估方法

A simple method for evaluating biodegradability of pre-ozonized water

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