臭氧预氧化对焦化废水中有机污染物的去除规律研究

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• 英文论文题名：Efficiency and mechanism of organic-polluant removal during ozone pre-oxidation of coking wastewater
• 论文作者：张娜 ; 刘永泽 ; 李若愚 ; 封莉 ; 马辉 ; 张立秋
• 年：2016
• 作者机构：北京林业大学环境科学与工程学院;河钢集团宣钢公司;
• 论文关键词：焦化废水 ; 臭氧预氧化 ; 有机污染物 ; 臭氧消耗量
• 英文论文关键词：coking wastewater ; ozone pre-oxidation ; organic pollutant ; ozone consumption
• 会议召开时间：2016-12-14
• 会议录名称：2016全国水环境污染控制与生态修复技术高级研讨会论文集
• 语种：中文
• 分类号：X784
• 学会代码：HJKP
• 会议名称：2016全国水环境污染控制与生态修复技术高级研讨会
• 会议地点：中国云南腾冲
• 主办单位：中国环境科学学会、中国环境科学研究院
• 学会名称：中国环境科学学会
• 页数：9
• 文件大小：979k
• 原文格式：D
• 会议级别：全国

摘要

焦化废水中有机污染物成分复杂,可生化性较差,直接采用生物处理难以取得良好的去除效果。本文以某钢厂焦化废水为研究对象,采用臭氧连续投加方式对该废水进行预氧化处理,系统考察了臭氧预氧化对焦化废水中有机污染物的去除规律。结果表明,臭氧预氧化对COD、色度、UV_(254)和UV_(270)有较好的去除,去除率最高分别为49.60%,59.60%,57.70%和78.10%,TOC去除率相对较低,最高仅为20.10%;在氧化反应60 min内,臭氧利用率始终较高(>92.6%),且反应前30 min接近100%;臭氧氧化过程中,臭氧累计消耗量与COD累计去除量基本呈现线性关系,在臭氧氧化的不同反应时间段内,COD去除量与臭氧消耗量的比值略呈下降的趋势。三维荧光分析结果表明,在臭氧氧化过程中,焦化废水中的类腐殖质类物质含量有明显的去除,部分转化为可溶性的类微生物类产品。同时发现,焦化废水经臭氧氧化后,BOD5与COD的比值并没有随臭氧投量的增加而升高,反而略有下降的趋势,表明经过臭氧氧化后并没有明显提高此焦化废水的可生化性。
Coking effluent is a difficultly biological degraded wastewater containing complex organic pollutants, thus it is hard to get a high removal efficiency when biological treatment was applied. In this paper, coking wastewater from a steel plant was taken as the research object, by continuously dosing ozone into the wastewater for pretreatment, the removal trends of organic pollutants in coking wastewater during ozone pre-oxidation was systematically investigated. The results showed that ozone pre-oxidation had a good performance in the removal of COD, chroma, UV_(254) and UV_(270), and the highest removal rates of them were 49.60%, 59.60%, 57.70% and 78.10%, respectively, while the removal rate of TOC is relatively lower, with the highest rate of 20.10%. During the first 60 minutes of oxidation reaction, the utilization rate of ozone was constantly high(>92.60%), which was even close to 100% within the initial 30 minutes. During ozonation, the total removal amount of COD and the total accumulated ozone consumption exhibited a linear relationship, while at different reaction time of ozone oxidation, the ratio of COD removal and ozone consumption decreased slightly. Three dimensional fluorescence analysis showed that in ozonation process, the content of humic substances in coking wastewater obviously reduced, as part of them were transformed into soluble microbia-like byproduct. Meanwhile, after ozone oxidation, the ratio of BOD5 and COD in the coking wastewater showed a decreasing trend, rather than an increasing trend with the increase of ozone dosage, indicating that the biodegradability of coking wastewater was not significantly improved after ozonation.

引文

[1]罗志勇.焦化废水的物化处理技术研究进展[J].工业水处理,2012,32(10):4.
    [2]韦朝海,贺明和,任源,等.焦化废水污染特征及其控制过程与策略分析.环境科学学报,2007,27(7):1083-1093.
    [3]杨德敏,王兵,吴小娟,程伟(2011).混凝-臭氧氧化处理焦化废水生化出水的试验研究[J].石油炼制与化工,2011,42(8):83~87.
    [4]桂玉明(2008).用臭氧法处理焦化废水的研究,辽宁科技大学.
    [5]Zeng Y,Hong P K A,Waverk D A.Chemical-biologicaltreatment of pyrene[J].Water Res,2000,34(4):1157-1172.
    [6]郑俊,毛异,宁靓,程晓玲.焦化废水生化处理后有机物的臭氧氧化降解与转化[J].中国给水排水,2011,27(21):72-75.
    [7]谭娟,于衍真,冯岩.(2008).臭氧预氧化在废水处理中的研究进展[J].江苏化工,2008,36(1):39~44.
    [8]朱世云,张全兴,王连生,等.萘系化合物臭氧化对其,COD、DOC及可生化性影响研究[J].环境污染治理,技术与设备,1999,7(4):49-54.
    [9]雷霆,赵文涛,黄霞,等.混凝联合O3、O3/UV深度处理焦化废水的研究[J].中国给水排水,2010,26(5):100-103.
    [10]李福勤,牛红兰,裴浩,安晓婵,付先龙,李硕.臭氧氧化法预处理焦化废水的试验研究[J].工业用水与废水,2011,42(4):16~18.
    [11]水处理用臭氧发生器.CJ/T中华人民共和国城镇建设行业标准.
    [12]张全忠,吴潘,梁斌,王蓉艳.液相中臭氧浓度的检测[J].工业水处理,2011,21(4):30~32.
    [13]蒋丽春,唐绍明,游青,王月慧,彭军.靛蓝二磺酸钠褪色分光光度法测定水中臭氧[J].工作简报,2011,47(2):180~182.
    [14]孙媚华,陈迁,陈泽智,宋亭,宋光泉.紫外-可见分光光度法测定单质碘含量[J].仲恺农业工程学院学报,2012,25(2):37~41.
    [15]徐荣华,韦朝海.(2014).焦化废水中溶解性有机物的紫外可见吸收光谱和三维荧光光谱分析.全国水处理化学大会.
    [16]Wen C hen,P aulwesterhoff,Jerry A.,Leenheer,and Karlbooksh(2003)."Fluorescence Excitation-Emission Matrix Regional Integration to Quantify Spectra for Dissolved Organic Matter."Environmental Science&Technology37:5701-5710.