Environmental Engineering Department, Akdeniz University, 07058 Antalya, Turkey.
ENVIS Energy and Environmental Systems Research and Development Ltd., ITU ARI Technocity, Maslak, 34469 Istanbul, Turkey.
Molecules. 2018 Jul 20;23(7):1794. doi: 10.3390/molecules23071794.
This paper intended to explore the effect of alkaline H₂O₂ pretreatment on the biodegradability and the methane generation potential of greenhouse crop waste. A multi-variable experimental design was implemented. In this approach, initial solid content (3⁻7%), reaction time (6⁻24 h), H₂O₂ concentration (1⁻3%), and reaction temperature (50⁻100 °C) were varied in different combinations to determine the impact of alkaline H₂O₂ pretreatment. The results indicated that the alkaline H₂O₂ pretreatment induced a significant increase in the range of 200⁻800% in chemical oxygen demand (COD) leakage into the soluble phase, and boosted the methane generation potential from 174 mLCH₄/g of volatile solid (VS) to a much higher bracket of 250⁻350 mLCH₄/gVS. Similarly, the lignocellulosic structure of the material was broken down and hydrolyzed by H₂O₂ dosing, which increased the rate of volatile matter utilization from 31% to 50⁻70% depending on selected conditions. Alkaline H₂O₂ pretreatment was optimized to determine optimal conditions for the enhancement of methane generation assuming a cost-driven approach. Optimal alkaline H₂O₂ pretreatment conditions were found as a reaction temperature of 50 °C, 7% initial solid content, 1% H₂O₂ concentration, and a reaction time of six h. Under these conditions, the biochemical methane potential (BMP) test yielded as 309 mLCH₄/gVS. The enhancement of methane production was calculated as 77.6% compared to raw greenhouse crop wastes.
本文旨在探讨碱性 H₂O₂预处理对温室作物废弃物生物降解性和甲烷生成潜力的影响。采用多变量实验设计。在这种方法中，初始固含量（3⁻7%）、反应时间（6⁻24 小时）、H₂O₂浓度（1⁻3%）和反应温度（50⁻100°C）在不同组合中变化，以确定碱性 H₂O₂预处理的影响。结果表明，碱性 H₂O₂预处理导致化学需氧量（COD）泄漏到可溶相中增加了 200⁻800%，并将甲烷生成潜力从 174 mLCH₄/g挥发性固体（VS）提高到 250⁻350 mLCH₄/gVS 的更高范围。同样，H₂O₂投加会破坏和水解材料的木质纤维素结构，从而提高挥发性物质利用率，从 31%提高到 50⁻70%，具体取决于所选条件。碱性 H₂O₂预处理进行了优化，以在成本驱动的方法下确定增强甲烷生成的最佳条件。发现最佳碱性 H₂O₂预处理条件为反应温度 50°C、初始固含量 7%、H₂O₂浓度 1%和反应时间 6 小时。在此条件下，生物化学甲烷潜力（BMP）测试产生 309 mLCH₄/gVS。与原始温室作物废物相比，甲烷产量提高了 77.6%。
