Biodegradation and ecotoxicological assessment of pectin production wastewater  

作　　者：V.Reginatto E.R.Amante K.Gerhardy S.Kunst N.Duran 

机构地区：[1]Department of Food Science and Technology, Federal University of Santa Catarina - Rodovia Admar Gonzaga [2]Institute of Water Quality-University of Hannover [3]Biological Chemistry Laboratory, Chemistry Institute, State University of Campinas-UNICAMP

出　　处：《Journal of Environmental Sciences》2009年第11期1613-1619,共7页环境科学学报（英文版）

基　　金：supported by a grant from the National Council for Development and Research (CN-Pq/Brazil)

摘　　要：The chemical composition of pectin production wastewater and its toxicity during biological treatment were investigated. Samples of wastewater from different steps of a pectin production wastewater biological treatment plant were investigated including the influent of the treatment （1）, after denitrification tank （2）, after anaerobic treatment （3） and final effuent （4）. The conventional physicochemical characteristics of samples did not indicate wastewater toxicity. However, toxicity assessments carried out on Vibrio fischeri and Scenedesmus subspicatus indicated low EC50 values. The fractionation of the samples using an XAD resin showed that the toxicity was associated with the organic matter. Wastewater apparent molecular mass distributions were 14.3, 25.0, 24.4 and 29.6 kDa for samples 1-4, respectively. Finally, characteristics of the sample by pyrolisis-gas chromatography-mass spectrometry （Py-CG-MS） demonstrated its polyphenolic nature and a 23% increase in the levels of such compounds after the first biological treatment step.The chemical composition of pectin production wastewater and its toxicity during biological treatment were investigated. Samples of wastewater from different steps of a pectin production wastewater biological treatment plant were investigated including the influent of the treatment （1）, after denitrification tank （2）, after anaerobic treatment （3） and final effuent （4）. The conventional physicochemical characteristics of samples did not indicate wastewater toxicity. However, toxicity assessments carried out on Vibrio fischeri and Scenedesmus subspicatus indicated low EC50 values. The fractionation of the samples using an XAD resin showed that the toxicity was associated with the organic matter. Wastewater apparent molecular mass distributions were 14.3, 25.0, 24.4 and 29.6 kDa for samples 1-4, respectively. Finally, characteristics of the sample by pyrolisis-gas chromatography-mass spectrometry （Py-CG-MS） demonstrated its polyphenolic nature and a 23% increase in the levels of such compounds after the first biological treatment step.

关 键 词：pectin wastewater BIOASSAYS ECOTOXICITY pyrolisis-gas chromatography-mass spectrometry 

分 类 号：X703[环境科学与工程—环境工程]