The aim of this study is to evaluate the potential of some selected biomass waste to be used as feedstock in the production of bioethanol and biohydrogen along with chemicals in Brazil. The substrates are rice bran (RB), rice husk (RH), brewer's spent grain (BSG), soybean waste (SW), and wheat waste (WW). These substrates are treated by diluted acid hydrolysis in an autoclave under different conditions of acid concentration, temperature, reaction time, and moisture. The highest concentration of reducing sugars (RS) of RH, RB, BSG, SW, and WW hydrolysates, measured by the 3,5-dinitrosalicylic acid method (DNS), is 118.16 ± 2.85, 170.39 ± 20.47, 600.97 ± 23.05, 80.38 ± 2.39, and 228.04 ± 3.97 g_RS kg⁻¹_substrate (dry basis), respectively. Total sugar concentration (cellobiose, glucose, xylose, arabinose) in the RH, RB, BSG, SW, and WW hydrolysates (with highest concentration of RS) is 56.54 ± 3.65, 42.99 ± 0.84, 72.18 ± 2.34, 42.48 ± 0.18, and 78.03 ± 3.06 g_sugar kg⁻¹_substrate (dry basis). The total potential of bioethanol and biohydrogen production from the biomass assessed is 199.61 million L per year and 96.14 million m³ per year, respectively. Therefore, the assessed biomass is proved to be a potential biorefinery feedstock.

中文翻译：

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巴西生物质废物中生物乙醇、生物氢和化学品生产的估算

本研究的目的是评估一些选定的生物质废物在巴西用作生产生物乙醇和生物氢以及化学品的原料的潜力。底物是米糠 (RB)、稻壳 (RH)、啤酒糟 (BSG)、大豆废料 (SW) 和小麦废料 (WW)。这些底物在不同的酸浓度、温度、反应时间和湿度条件下，在高压釜中通过稀酸水解进行处理。通过 3,5-二硝基水杨酸法 (DNS) 测得的 RH、RB、BSG、SW 和 WW 水解产物的还原糖 (RS) 最高浓度为 118.16 ± 2.85、170.39 ± 20.47、600.97 ± 23.05、80.38 ± 2.39 和 228.04 ± 3.97 g _RS kg ^-1_底物（干基），分别。RH、RB、BSG、SW 和 WW 水解产物（RS 浓度最高）中的总糖浓度（纤维二糖、葡萄糖、木糖、阿拉伯糖）为 56.54 ± 3.65、42.99 ± 0.84、72.18 ± 2.34、42.48 ± 0.18 和78.03 ± 3.06 g_糖kg ^-1_底物（干基）。评估的生物质生产生物乙醇和生物氢的总潜力分别为每年 1.9961 亿升和每年 9614 万^立方米。因此，评估的生物质被证明是一种潜在的生物精炼原料。