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首页> 外文期刊>Journal of Environmental Management >Selection of hydrothermal pre-treatment conditions of waste sludge destruction using multicriteria decision-making
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Selection of hydrothermal pre-treatment conditions of waste sludge destruction using multicriteria decision-making

机译：基于多准则决策的废物污泥水热预处理条件选择

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The effectiveness of hydrothermal treatment for the destruction of the organic content of sludge waste was investigated. The sludge sampled in this study contained approximately 2% solids. The experimental program consisted of hydrothermal treatment experiments conducted in a batch reactor at temperatures between 100 and 250 degrees C, with the addition of an oxidant (hydrogen peroxide) in the range of 0-150% with reference to TCOD, and reaction times of up to 60 min. The results suggested that the availability of oxidant, reaction temperature and reaction time were the determining factors for COD removal. A significant fraction of the COD remaining after treatment consisted of the dissolved COD. The results confirmed that hydrothermal treatment proceeds through hydrolysis resulting in the production of dissolved organic products followed by COD removal through oxidation. Two MCDM chemometrics methods, PROMETHEE and GAIA, were applied to process the large data matrix so as to facilitate the selection of the most suitable hydrothermal conditions for sludge destruction. Two possible scenarios were produced from this analysis-one depended on the use of high temperatures and no oxidant, while the second offered a choice of compromise solutions at lower temperatures but with the use of at least some oxidant. Thus, for the final choice of operating conditions, the decision maker needs local knowledge of the costs and available infrastructure. In principle, such information could be added as further criteria to the data matrix and new rankings obtained.
机译：研究了水热处理对污泥废料中有机物破坏的有效性。在这项研究中采样的污泥包含大约2％的固体。实验程序包括在间歇反应器中于100至250摄氏度之间的温度下进行的水热处理实验，其中添加了相对于TCOD为0-150％的氧化剂（过氧化氢），且反应时间为至60分钟结果表明，氧化剂的可用性，反应温度和反应时间是去除COD的决定性因素。处理后剩余的大部分COD由溶解的COD组成。结果证实水热处理通过水解进行，导致产生溶解的有机产物，然后通过氧化除去COD。两种MCDM化学计量学方法PROMETHEE和GAIA被用于处理大型数据矩阵，以便于选择最合适的水热条件来降解污泥。此分析产生了两种可能的情况-一种取决于使用高温且不使用氧化剂，而第二种则提供了在较低温度下选择折衷方案的选择，但至少使用了一些氧化剂。因此，对于运营条件的最终选择，决策者需要成本和可用基础设施的本地知识。原则上，可以将此类信息作为进一步的标准添加到数据矩阵中，并获得新的排名。

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