ASBR处理食品废水中DOM转化过程的荧光光谱

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Abstract

The spectral characteristic and the source of the dissolved organic matter (DOM) were investigated in the treatment of food wastewater with anaerobic sequencing batch reactor (ASBR) through three dimensional fluorescence spectra, and the correlation was analyzed between fluorescence intensity of DOM characteristic peak and ammonia nitrogen concentration. The ASBR results showed that the organic substances can be degraded effectively in food wastewater: the COD concentration in influent and effluent were 1000mg/L and 91mg/L respectively, and the removal rate of COD was 91.73%. There were fluorescence peaks of five substances in three-dimensional fluorescence spectra: high excitation wavelength tryptophan (peak A), low excitation wavelength tryptophan (peak B), visible light wavelength fulvic acid (peak C), UV light wavelength fulvic acid (peak D), and humic acid (peak E). During the reaction, the fluorescence intensities of peak A, peak B and peak C first increased but afterwards decreased, the fluorescence intensity of peak D showed a weak increasing trend, and the fluorescence intensity of peak E first decreased and afterwards increased. Fluorescence spectrum parameters, including fluorescence index (FI), humification index (HIX), and biological index (BIX), indicated that wastewater obviously has biological characteristics. Statistical analyses pointed to correlations between ammonia nitrogen and fluorescence intensity of tryptophan, including fluorescence intensity of peak A, fluorescence intensity of peak B, sum of tryptophan fluorescence intensity, with correlation coefficients being respectively 0.8136, 0.9390 and 0.9153. In the anaerobic biological treatment of food wastewater, rapid detection of ammonia nitrogen can be realized through three-dimensional fluorescence spectrometry.

Key words： anaerobic sequencing batch reactor dissolved organic matter three dimensional fluorescence spectra fluorescence index fluorescence intensity

Received: 25 November 2015

PACS:

X703.1

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	Articles by authors
	HUANG Jian
	LING Ling
	ZHANG Hua
	LING Qi
	ZHANG Yong
	TIAN Ji-yu
	YAN Sheng
	LIU Pei-ran

Cite this article:

HUANG Jian,LING Ling,ZHANG Hua等. Fluorescence spectra of dissolved organic matter in food wastewater treatment by ASBR process[J]. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(6): 1746-1751.

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http://manu36.magtech.com.cn/Jweb_zghjkx/EN/ OR http://manu36.magtech.com.cn/Jweb_zghjkx/EN/Y2016/V36/I6/1746

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