猪场废水厌氧消化液后处理过程中DOM变化特征

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...

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

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/E₂₅₃ decreased speedily in aerobic reactor, and easily degradable organic matter have been degraded rapidly in aerobic reactor.