摘要
采用三维荧光光谱技术研究合肥市某污水处理厂污水处理过程中溶解性有机物(DOM)变化过程及荧光强度与COD浓度的关系。三维荧光光谱结果显示,原水中DOM主要由低激发波长色氨酸、高激发波长色氨酸和可见光区类腐殖酸组成;经过厌氧处理后,高激发波长色氨酸、低激发波长色氨酸荧光强度明显降低,分别从759.5、849.3降到388.6、387.4,同时在厌氧处理阶段有可见光区类富里酸生成,荧光强度为459.8。后续缺氧—好氧—沉淀—过滤—消毒处理中,低激发波长色氨酸、高激发波长色氨酸荧光强度基本都呈现降低趋势,最终出水的荧光强度分别为201.9、164.3。低激发波长色氨酸荧光强度、高激发波长色氨酸荧光强度、色氨酸荧光强度之和与COD浓度的相关系数(R2)分别为0.973 2、0.938 4、0.957 6。研究表明,利用三维荧光光谱技术可以阐明污水处理过程中DOM的变化过程及快速准确测量COD浓度。
Transformation of dissolved organic matter（DOM）was analyzed in wastewater treatment process by three dimensional fluorescence spectra technology.The correlation between fluorescence intensity of DOM and COD concentration were also discussed.The results of three dimensional fluorescence spectra revealed that there were three kinds of DOM in raw water,i.e.,the shorter excitation wavelength of tryptophan,the longer excitation wavelength of tryptophan,the visible wavelength of humic acid.After anaerobic treatment,the fluorescence intensity of the longer excitation wavelength of tryptophan and the shorter excitation wavelength of tryptophan decreased obviously from759.5and 849.3to 388.6and 387.4,respectively.The visible wavelength of fulvic acid generated during anaerobic treatment,with the fluorescence intensity being 459.8.Then the fluorescence intensity of the shorter excitation wavelength of tryptophan,the longer excitation wavelength of tryptophan decreased obviously with the subsequent anoxic treatment,aerobic treatment,sedimentation,filtration,and disinfection.The fluorescence intensities of these two kinds of DOM mentioned above in effluent were 201.9,164.3,respectively.The correlation results showed that the correlation coefficients（R2）between COD concentration and fluorescence intensity of the shorter excitation wavelength of tryptophan,the longer excitation wavelength of tryptophan,and the sum of fluorescence intensity of tryptophan,were0.973 2,0.938 4,0.957 6,respectively.This study demonstrated that the transformation of the DOM and the measurement of COD concentration may be characterized by three dimensional fluorescence spectra technology in wastewater biological treatment process.
作者
张华
田纪宇
黄健
张勇
王坤
全桂军
刘沛然
闫升
ZHANG Hua TIAN Jiyu HUANG Jian ZHANG Yong WANG Kun QUAN Guijun LlU Peiran YAN Sheng.(Key Laboratory of Anhui Province of Water Pollution Control and Wastewater Reuse, School of Environment and Energy Engineering ,Anhui J ianzhu University, He f ei Anhui 230601)
出处
《环境污染与防治》
CAS
CSCD
北大核心
2017年第4期375-378,383,共5页
Environmental Pollution & Control
基金
安徽省高校优秀青年骨干人才国内外访学研修项目(No.gxfx2017054)
安徽省高校自然科学研究重点项目(No.KJ2016A817)
国家水体污染控制与治理科技重大专项(No.2014ZX07303-003-09、No.2014ZX07405-003-03)
安徽省高校优秀青年人才支持计划重点项目(No.gxyqZD2017059)
关键词
三维荧光光谱
溶解性有机物
荧光强度
COD
three dimensional fluorescence spectra
dissolved organic matter
fluorescence intensity
COD
