Abstract
Water samples from different biochemical reaction time in one reactor period in Micro-Pressure Inner-Loop Bioreactor (MPR) were measured respectively with adopt Excitation-emission matrix (EEM) fluorescence spectroscopy, Total organic carbon (TOC) and chemical oxygen demand (CODCr),analyzed the correlation among the fluorescence integrates volume, TOC and CODCr.Results showed that with the increase of biochemical treatment time, sewage fluorescence integrates volume declined significantly, known fluorescence integrates volume, CODCr and TOC value better correlation, by fluorescence spectrometry analyzed fluorescence characteristics of sewage to determine the organic wastewater degradation effect, can be simpler and more rapid the judgment of the sewage treatment effect.
Highlights
This paper is mainly based on fluorescent area integral (FRI) analysis method to analyze the DOM of sewage in the process of Micro-Pressure Inner-Loop Bioreactor (MPR) reactor treatment.Set up the correlation of CODCr, Total organic carbon (TOC) and DOM content, to broaden the application of three-dimensional fluorescence spectrometry and realize the rapid and accurate monitoring of municipal wastewater, in order to optimize the MPR operation, management, provide the specialized reference and support
3.1 Integral analyses of fluorescence region in MPR Depending on FRI calculation method, get the Excitation-emission matrix (EEM) spectra of five regional volume integral standard Φi,n
Region V is related to the organics with large molecular weight and high degree of aromatization, such as fulvic acid, humic acid and polycyclic aromatic hydrocarbon in visible light region.Every region is integral standardized volume Φi,n indirectly characterize the five fluorescent areas represent the relative content of soluble organic matter
Summary
MPR is a new sewage treatment process, which has advantages of small footprint and low energy consumption, can realize the existence of three different oxygen regions(anaerobic region, anoxic region and aerobic region)in the same space at the same time.TOC and CODCr reflected water organic pollution condition[1,2,3,4], but contained in municipal wastewater of organic matter is very complicated, potassium dichromate doesn't oxidize all organic compounds in municipal wastewater, the standard analytical method for CODCr determination is cumbersome to operate, silver sulfate and sulfuric acid mercury reagent is easy to cause secondary pollution, the TOC analysis measurements can be more comprehensive reflection of the organic pollutants in municipal wastewater, but compared with Excitation-emission matrix (EEM) fluorescence spectroscopy, the latter sample amount needed for the smaller, shorter measure time.In recent years, EEM fluorescence spectroscopy widely applied in wastewater treatment field, with higher sensitivity, can be fully dissolving organic matter in water identification and resolution, gets the benefits of high selectivity and high amount of information[5].This paper is mainly based on FRI analysis method to analyze the DOM of sewage in the process of MPR reactor treatment.Set up the correlation of CODCr, TOC and DOM content, to broaden the application of three-dimensional fluorescence spectrometry and realize the rapid and accurate monitoring of municipal wastewater, in order to optimize the MPR operation, management, provide the specialized reference and support.
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