翻堆对好氧堆肥腐殖质电子转移能力的影响  

Effects of turning on the electron transfer capacity of humic substances in aerobic composting

作　　者：路一鸣 李军[1] 代雨 莫锦韬 张军[1] 席北斗[2] LU Yi-ming;LI Jun;DAI Yu;MO Jin-tao;ZHANG Jun;XI Bei-dou(Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area,Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology,Guilin University of Technology,Guangxi Guilin 541004,China;Chinese Research Academy of Environmental Sciences,Beijing 100012,China)

机构地区：[1]桂林理工大学,广西岩溶地区水污染控制与用水安全保障协同创新中心,广西环境污染控制理论与技术重点实验室,广西桂林541004 [2]中国环境科学研究院,北京100012

出　　处：《中国环境科学》2022年第12期5748-5757,共10页China Environmental Science

基　　金：国家自然科学基金资助项目(51868011);广西创新研究团队项目(2018GXNSFGA281001)。

摘　　要：开展了连续通风和翻堆两种典型的通风方式进行污泥好氧堆肥,通过分析堆肥腐殖质中富里酸(FA)和胡敏酸(HA)的光谱特征以及本底/化学还原容量(NRC/CRC)的时态变化,研究其对污泥好氧堆肥过程中富里酸(FA)和胡敏酸(HA)的形成和电子转移能力(ETCs)的影响.结果表明:与翻堆处理相比,连续通风处理促进了堆肥FA和HA中类蛋白质组分的减少和类腐殖质组分的增加,强化了高温期和腐熟期FA的电子转移能力(CRC分别增加了176.55和123.24μmol e-/gC),但降低了HA和升温期FA的电子转移能力(CRC分别降低了246.47和116.13μmol e-/gC).相关性分析表明,影响污泥堆肥腐殖质电子转移能力的主要因素为pH值、SUVA254、SUVA290和类蛋白质组分,翻堆处理促进了类腐殖质组分对腐殖质电子转移能力的影响.This study focus investigated the effects of two typical kinds of ventilation strategies(continuous aeration,turning)on the formation and electron transfer capacities(ETCs)of fulvic acid(FA)and humic acid(HA)during sewage-sludge composting by analyzing the temporal variation of spectrum features and the native/chemical reducing capability(NRC/CRC)of these two humic substances.The results showed that:compared with the turning,continuous ventilation promoted the reduction of protein-like fractions and the increase of humic-like fractions in FA and HA during the whole composting,enhanced ETCs of FA during the thermophilic and maturity phases(CRC increased 176.55μmol e-/gC,123.24μmol e-/gC),but reduced ETCs of HA and FA during the heating phase(CRC decreased 246.47μmol e-/gC,116.13μmol e-/gC).According to the results from the correlation analysis,the most important variables in influencing ETCs of humic substances were pH,SUVA254,SUVA290,and protein-like fraction;meanwhile,the turning improved the effect of humus-like fractions on the ETCs of the humic substances.

关 键 词：污泥 好氧堆肥 腐殖质 电子转移能力 翻堆 

分 类 号：X705[环境科学与工程—环境工程]