Department of Engineering, Aarhus University, Blichers Allé 20, DK 8830 Tjele, Denmark.
Department of Engineering, Aarhus University, Blichers Allé 20, DK 8830 Tjele, Denmark.
Bioresour Technol. 2017 Sep;239:258-265. doi: 10.1016/j.biortech.2017.05.032. Epub 2017 May 8.
Alkaline pretreatment of lignocellulosic biomass has been intensively investigated but heavy water usage and environmental pollution from wastewater limits its industrial application. This study presents a pretreatment technique by in-situ injection of potassium hydroxide concentrations ranging from 0.8% to 10% (w/w) into the briquetting process of wheat straw and meadow grass. Results show that the biomethane yield and hydrolysis rate was improved significantly with a higher impact on wheat straw compared to meadow grass. The highest biomethane yield from wheat straw briquettes of 353mL.g VS was obtained with 6.27% (w/w) potassium hydroxide injection, which was 14% higher than from untreated wheat straw. The hydrolysis rates of wheat straw and meadow grass increased from 4.27×10 to 5.32×10d and 4.19×10 to 6.00×10d, respectively. The low water usage and no wastewater production make this a promising technology.
木质纤维素生物质的堿预处理得到了广泛研究，但由于废水产生的大量耗水和环境污染，限制了其工业应用。本研究提出了一种预处理技术，通过向麦秸和草地草的压块过程中就地注入浓度为 0.8%至 10%（w/w）的氢氧化钾。结果表明，与草地草相比，生物甲烷产量和水解率显著提高，对麦秸的影响更大。用 6.27%（w/w）氢氧化钾注射获得了最高的麦秸压块生物甲烷产量 353mL.g VS，比未处理的麦秸高 14%。麦秸和草地草的水解率分别从 4.27×10 增加到 5.32×10 和从 4.19×10 增加到 6.00×10。低耗水量和无废水产生使这项技术很有前途。
