基于光谱学分析蚯蚓堆肥对市政污泥水溶性有机物的影响

发布时间：2018-01-15 03:16

本文关键词：基于光谱学分析蚯蚓堆肥对市政污泥水溶性有机物的影响　出处：《环境科学与技术》2017年10期 　论文类型：期刊论文

【摘要】：采用分子量分级、极性分析、光谱分析方法,研究了市政污泥水溶性有机物(DOM)在蚯蚓堆肥前后的变化特征。结果表明,蚯蚓处理后污泥DOM中300 D的组分含量高出对照组污泥6.50%,8 000 D的组分则少了56.25%;疏水性组分比例高出对照组50.76%。光谱分析表明,试验组中均存在羧酸、芳香族物质等,且蚯蚓处理后污泥DOM的蛋白质含量、分子量降低,多糖和芳香族物质含量增加。荧光光谱显示原始污泥中含有大量蛋白质和腐殖质,经过90 d降解生成色氨酸、酪氨酸等物质,且处理组腐殖化程度高于对照组。
[Abstract]:Molecular weight classification, polarity analysis and spectral analysis were used to study the changes of water-soluble organic matter (DOM) in municipal sludge before and after earthworm composting. The content of 300D in DOM of earthworm treated sludge was 56.25 less than that of control sludge 6.50D and 8000 D. The ratio of hydrophobic components was higher than that of the control group (50.76%). The spectrum analysis showed that there were carboxylic acids and aromatic substances in the test group, and the protein content and molecular weight of DOM in sludge treated with earthworm were decreased. The content of polysaccharides and aromatic substances increased. Fluorescence spectra showed that the original sludge contained a lot of protein and humus, after 90 days of degradation to produce tryptophan, tyrosine and other substances. The humification degree of the treatment group was higher than that of the control group.
【作者单位】：扬州大学环境科学与工程学院;
【基金】：国家自然科学基金(31372133,41472034) 江苏省重点实验室开放课题(K13071,K14017)
【分类号】：X705
【正文快照】： 近年来,随着我国经济和工业化的快速发展,废污水处理产生的大量市政污泥已成为严重的环境问题,因此污泥的减量化和再利用备受关注。污水处理厂产生的剩余污泥应用于农业和造林中可以提高土壤肥力,也有助于保持土壤结构、持水能力、阳离子交换量和土壤生物活性[1]。但是污泥的

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