翻堆对好氧堆肥腐殖质电子转移能力的影响

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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.

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	路一鸣
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关键词 ：污泥, 好氧堆肥, 腐殖质, 电子转移能力, 翻堆

Abstract：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.

Key words： sewage sludge aerobic composting humic substances electron transfer capacity turning

收稿日期: 2022-05-05

PACS:

X705

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

通讯作者: 张军,副教授,zjun@glut.edu.cn E-mail: zjun@glut.edu.cn

作者简介: 路一鸣(1998-),男,河南洛阳人,硕士研究生,主要研究方向为固体废弃物处理与资源化利用.发表论文1篇.

引用本文:

路一鸣, 李军, 代雨, 莫锦韬, 张军, 席北斗. 翻堆对好氧堆肥腐殖质电子转移能力的影响[J]. 中国环境科学, 2022, 42(12): 5748-5757. LU Yi-ming, LI Jun, DAI Yu, MO Jin-tao, ZHANG Jun, XI Bei-dou. Effects of turning on the electron transfer capacity of humic substances in aerobic composting. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(12): 5748-5757.

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http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2022/V42/I12/5748

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