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首页> 外文期刊>RSC Advances >Two-dimensional FTIR correlation spectroscopy reveals chemical changes in dissolved organic matter during the biodrying process of raw sludge and anaerobically digested sludge
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Two-dimensional FTIR correlation spectroscopy reveals chemical changes in dissolved organic matter during the biodrying process of raw sludge and anaerobically digested sludge

机译：二维FTIR相关光谱揭示了原污泥和厌氧消化污泥的生物干燥过程中溶解有机物的化学变化

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摘要

Chemical changes in dissolved organic matter (DOM) during the biodrying of raw sludge (RS) and anaerobically digested sludge (ADS) were analyzed by various techniques, e.g., two-dimensional FTIR correlation spectroscopy (2D FTIR COS). The results showed that the RS and ADS matrices achieved the desired biodrying performance after 18 days. Biodrying caused a decrease in the dissolved organic carbon content and an increase in the molecular weight, aromaticity, and fluorescent intensity of DOM in the sludge matrices. Compared with the RS matrix, the organic matter of the ADS was more biostable, resulting in a lower biodrying performance. The asynchronous map of 2D FTIR COS analysis showed the changes in the heteropolysaccharide first, followed by the protein-like groups in the matrices during the biodrying process, which was contrary to the previous results from anaerobic digestion. They supply the first evidence for the complementarities of anaerobic and aerobic processes in sludge organic compound degradation. 2D FTIR COS analysis is a feasible technique to explore the degradation characteristics of individual organic matters during the sludge treatment.
机译：通过各种技术（例如二维FTIR相关光谱法（2D FTIR COS））分析了原始污泥（RS）和厌氧消化的污泥（ADS）的生物干燥过程中溶解有机物（DOM）的化学变化。结果表明，RS和ADS基质在18天后达到了所需的生物干燥性能。生物干燥导致了污泥基质中溶解有机碳含量的减少以及DOM的分子量，芳香性和荧光强度的增加。与RS基质相比，ADS的有机物具有更高的生物稳定性，从而导致较低的生物干燥性能。二维FTIR COS分析的异步图谱显示，在生物干燥过程中，杂多糖首先发生变化，然后是基质中的蛋白样基团变化，这与先前的厌氧消化结果相反。他们为污泥有机化合物降解中厌氧和好氧过程的互补性提供了第一个证据。二维FTIR COS分析是探索污泥处理过程中单个有机物降解特性的可行技术。

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