Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, via Di Biasio 43, 03043 Cassino (FR), Italy; UNESCO-IHE, Westvest 7, 2611 AX Delft, The Netherlands.
Department of Civil, Architectural and Environmental Engineering, University of Naples Federico II, via Claudio 21, 80125 Naples, Italy.
Bioresour Technol. 2018 Jan;247:897-903. doi: 10.1016/j.biortech.2017.10.001. Epub 2017 Oct 5.
The effect of trace elements (TEs) addition and NaOH pretreatment on the anaerobic digestion of rice straw was investigated in batch tests. Co, Ni and Se were added to the raw rice straw at different dosages. The NaOH pretreatment was applied to the rice straw both alone and in combination with the addition of TEs, in order to evaluate potential synergistic effects of the pretreatment and the TEs supplementation on the biogas production yields. The results obtained showed that the alkaline pretreatment was more effective than the TEs addition in increasing the cumulative biogas production, causing a 21.4% enhancement of the final biomethane yield, whereas the increase due to TEs dosing was not statistically significant. The analysis of volatile fatty acids (VFAs) confirmed that the NaOH pretreatment resulted in a higher production of VFAs, indicating an increased hydrolysis, while TEs addition did not cause significant changes in the VFA concentrations.
研究了微量元素 (TEs) 添加和 NaOH 预处理对稻草厌氧消化的影响，在分批试验中进行。将 Co、Ni 和 Se 添加到原始稻草中，添加量不同。NaOH 预处理分别单独应用于稻草，以及与 TEs 添加联合应用，以评估预处理和 TEs 补充对沼气产量的潜在协同作用。结果表明，与 TEs 添加相比，碱性预处理更有效地增加了累积沼气产量，最终生物甲烷产量提高了 21.4%，而 TEs 投加的增加则没有统计学意义。挥发性脂肪酸 (VFAs) 的分析证实，NaOH 预处理导致 VFAs 的产量更高，表明水解增加，而 TEs 添加并未导致 VFA 浓度发生显著变化。
