猪场废水厌氧消化液后处理过程中DOM变化特征  

Characteristics Variations of Dissolved Organic Matter from Digested Piggery Wastewater Treatment Process

作　　者：曾凤[1,2] 霍守亮[2] 席北斗[2] 昝逢宇[2,3] 胡翔[1] 李明晓[2] 

机构地区：[1]北京化工大学化学工程学院,北京100029 [2]中国环境科学研究院,北京100012 [3]安徽师范大学环境科学学院,芜湖241000

出　　处：《环境科学》2011年第6期1687-1695,共9页Environmental Science

基　　金：国家水体污染控制与治理科技重大专项(2008ZX07209-007);国家自然科学基金项目(40901248);国家科技支撑计划项目(2009BADC2B01)

摘　　要：为了快速表征猪场废水厌氧消化液的后处理过程中有机物的特性变化,利用离子色谱、荧光光谱和紫外光谱方法对水解酸化-好氧反应器内溶解性有机物(DOM)时空变化进行了系统分析.水解酸化反应器进水2 h和循环1 h后,有机酸产生的总量分别达到283.6 mg/L和305.5 mg/L,随后降低,并稳定在200 mg/L左右,而在好氧过程中被快速降解,未检测出小分子有机酸;水解阶段污水的同步荧光和三维荧光主要以类蛋白物质荧光峰为主,类蛋白物质的荧光峰强度随着水解时间增加而增强,而好氧过程中有机物中出现结构复杂的类富里酸荧光峰,且逐渐增强.水解阶段同步荧光277 nm处的峰强与有机酸浓度总量呈现显著相关关系.随着水解时间延长,SUVA254、E253/E203分别由1.5和0.28增至1.4和0.3,有机物芳香性和不饱和性增加,同时芳环物质的稳定性变差,而好氧反应器中SUVA254、E253/E203快速变小,易降解有机物被快速消耗.The main objectives of this study are rapidly revealing the characteristics variation of dissolved organic matter（DOM） in digested piggery wastewater treatment process.The ion chromatography,fluorescence spectra and ultraviolet spectra were used to investigate the space-time changes of DOM in hydrolyze-acidification and aerobic reactors.The results indicated that the concentration of organic acid concentration rapidly reached to the maximum concentration of 283.6 mg/L and 305.5 mg/L respectively in 2 h at the beginning of hydrolyze reaction and 1h after recirculation between two reactors,then reduced to about 200 mg/L and stayed relatively constant,and organic acids were degraded fast and no detection in aerobic reactor.The synchronous and three-dimensional excitation-emission matrix fluorescence spectroscopy of DOM from hydrolyze-acidification reactor was protein-like fluorescence and the fluorescence intensity increased gradually.However,in aerobic reactor,fluorescence peak of DOM appeared Fulic-like fluorescence,and the fluorescence intensity strengthened gradually.The synchronous intensity of 277 nm wavelength was significantly correlated with the concentration of organic acids.SUVA254 and E253/E203 increased from 1.5 and 0.28 to 1.4 and 0.3 respectively during the hydrolyze reaction,which suggested that aromatic and unsaturated compounds slightly increased and the stability of aromatic compounds was weaken.While SUVA254 and E253/E203 decreased speedily in aerobic reactor,and easily degradable organic matter have been degraded rapidly in aerobic reactor.

关 键 词：厌氧消化液 水解酸化 溶解性有机物 光谱分析 有机酸 三维荧光 

分 类 号：X713[环境科学与工程—环境工程]