外源性物质对消化沼液中DOM光谱特征的影响  

Effects of exogenous substances on the spectral characteristics of DOM in digested biogas slurry

作　　者：余羿琼 周翠红[1] 冯书耕 张明玉 王梦涵 YU Yiqiong;ZHOU Cuihong;FENG Shugeng;ZHANG Mingyu;WANG Menghan(Department of Environmental Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617,China)

机构地区：[1]北京石油化工学院机械工程学院环境工程系,北京102617

出　　处：《环境工程学报》2025年第2期364-372,共9页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(51104022);大学生研究训练计划资助项目(2022J00186)。

摘　　要：餐厨垃圾厌氧消化产酸是其资源化、能源化利用的重要途径,但消化过程中产生的沼液成为限制技术发展的关键因素,沼液处理成为亟需解决的问题,需要明确其组分才能更好实现沼液产品的增值化。通过添加外源性物质与自身源物质对比,采用三维荧光光谱结合区域积分和平行因子技术,探究餐厨垃圾消化沼液中溶解性有机物(DOM)的荧光组分和荧光强度差异与餐厨垃圾厌氧消化产酸性能。研究结果表明,加入外源性物质的餐厨垃圾厌氧消化能够缩短乙酸产出时间,总氮含量与区域积分法分析出的芳香类蛋白质Ⅰ有显著正相关关系,区域积分分析与平行因子分析能够揭示沼液中溶解性有机物的类别并显示各组分的变化,加入外源性物质能够促进餐厨垃圾厌氧消化DOM的产生。本研究结果可为沼液产品增值化的应用提供理论参考。Anaerobic digestion of kitchen waste for acidogenesis is one of the most promising technologies for recycling resources and recovering energy for better sustainable development,however,high yields of digestate constrains the development of this technology,rendering proper treatment of digestate a stranglehold problem,which is fundamentally dependent upon fast and accurate determination of compositions and corresponding abundances in digestates.This study used three-dimensional fluorescence spectroscopy combined with fluorescence region integration(FRI)and parallel factor(PARAFAC)methods to investigate different effects of exogenous and self-derived substances on fluorescence components and intensities of dissolved organic matter(DOM)in digestate as well as acid production performance along kitchen waste digestion.The results indicated that adding exogenous substances to kitchen waste digestion could accelerate production of acetic acid and DOMs in the digestate.Total nitrogen in digestate was significantly and positively correlated with the FRIrevealed aromatic protein I.Both FRI and PARAFAC could accurately reveal the DOMs’categories in digestate and indicate the dynamic variations of each component.The results could provide a theoretical reference for enhancing kitchen waste anaerobic digestion and value-added digestate recycling utilization.

关 键 词：厌氧消化 餐厨垃圾 溶解性有机物 区域积分法 平行因子法 

分 类 号：X705[环境科学与工程—环境工程]