This study investigates the utilization of the biodrying process, which is an eco-friendly approach for sewage sludge management to produce a fuel-like product. Biodrying tests were conducted for six trials containing different amounts of bulking agents (straw and sawdust). Higher volatile matter removal was achieved for trials with sawdust as a result of better porosity conditions. Consequently, biodrying indexes were higher for straw containing trials (7.73–30.85) with straw than those trails with sawdust (6.94–13.99). Trials with straw resulted in biodried materials with lower moisture content and higher calorific value due to lower water holding capacity of straw. However, sawdust provided better fuel quality due to the higher bulk density of the product. Thus, fuel value indexes determined for trials with sawdust (81.62–152.17) were remarkably higher than those of trials with straw (16.02–68.97). Furthermore, biomass characterization indexes (>25.000) indicated that products with sawdust can be used as promising alternatives to biomass such as wood chips and wood chunks in combustion facilities.

中文翻译：

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从污水污泥中回收燃料的生物干燥：通过最终分析和近似分析进行综合评估

本研究调查了生物干燥过程的利用，这是一种环保的污水污泥管理方法，可生产类似燃料的产品。对含有不同数量的填充剂（稻草和锯末）的六项试验进行了生物干燥测试。由于更好的孔隙率条件，锯末试验的挥发性物质去除率更高。因此，秸秆含秸秆试验（7.73-30.85）的生物干燥指数高于锯末试验（6.94-13.99）。由于秸秆的持水能力较低，用秸秆进行的试验导致生物干燥材料的水分含量较低，热值较高。然而，由于产品的堆积密度较高，锯末提供了更好的燃料质量。因此，为锯末试验确定的燃料价值指数 (81.62–152. 17）显着高于稻草试验（16.02-68.97）。此外，生物质表征指数 (>25.000) 表明，锯末产品可用作生物质的有希望的替代品，例如燃烧设施中的木屑和木块。