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首页> 美国卫生研究院文献>International Journal of Molecular Sciences >Thermochemical Pretreatments of Organic Fraction of Municipal Solid Waste from a Mechanical-Biological Treatment Plant
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Thermochemical Pretreatments of Organic Fraction of Municipal Solid Waste from a Mechanical-Biological Treatment Plant

机译：机械-生物处理厂生活垃圾有机组分的热化学预处理

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摘要

The organic fraction of municipal solid waste (OFMSW) usually contains high lignocellulosic and fatty fractions. These fractions are well-known to be a hard biodegradable substrate for biological treatments and its presence involves limitations on the performance of anaerobic processes. To avoid this, thermochemical pretreatments have been applied on the OFMSW coming from a full-scale mechanical-biological treatment (MBT) plant, in order to pre-hydrolyze the waste and improve the organic matter solubilisation. To study the solubilisation yield, the increments of soluble organic matter have been measured in terms of dissolved organic carbon (DOC), soluble chemical oxygen demand (sCOD), total volatile fatty acids (TVFA) and acidogenic substrate as carbon (ASC). The process variables analyzed were temperature, pressure and NaOH dosage. The levels of work for each variable were three: 160–180–200 °C, 3.5–5.0–6.5 bar and 2–3–4 g NaOH/L. In addition, the pretreatment time was also modified among 15 and 120 min. The best conditions for organic matter solubilisation were 160 °C, 3 g NaOH/L, 6.5 bar and 30 min, with yields in terms of DOC, sCOD, TVFA and ASC of 176%, 123%, 119% and 178% respectively. Thus, predictably the application of this pretreatment in these optimum conditions could improve the H2 production during the subsequent Dark Fermentation process.
机译：城市固体废物的有机部分（OFMSW）通常包含高含量的木质纤维素和脂肪部分。众所周知，这些馏分是用于生物处理的可生物降解的硬质底物，其存在限制了厌氧工艺的性能。为了避免这种情况，已经对来自大型机械生物处理（MBT）厂的OFMSW进行了热化学预处理，以对废物进行预水解并改善有机物的溶解度。为了研究增溶收率，已根据可溶性有机碳（DOC），可溶性化学需氧量（sCOD），总挥发性脂肪酸（TVFA）和产酸底物碳（ASC）来测量可溶性有机物的增量。分析的过程变量是温度，压力和NaOH用量。每个变量的工作水平为三种：160–180–200°C，3.5–5.0–6.5 bar和2–3–4 g NaOH / L。此外，预处理时间也在15和120分钟之间进行了修改。溶解有机物的最佳条件是160°C，3 g NaOH / L，6.5 bar和30分钟，DOC，sCOD，TVFA和ASC的产率分别为176％，123％，119％和178％。因此，可预见的是，在这些最佳条件下进行这种预处理可以改善随后的黑暗发酵过程中氢气的产生。

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