Henan Academy of Sciences, Zhengzhou 450052, China.
CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.
Molecules. 2024 Aug 27;29(17):4061. doi: 10.3390/molecules29174061.
The influence of adding surfactants on the performance of high-solid anaerobic digestion of horticultural waste was extensively investigated in batch systems. Adding Tween series and polyethylene glycol series non-ionic surfactants had positive effects on biogas production, resulting in 370.1 mL/g VS and 256.6 mL/g VS with Tween 60 and polyethylene glycol 300 at a surfactant-to-grass mass ratio of 0.20, while the biogas production of anaerobic digestion without surfactants was 107.54 mL/g VS. The optimal and economically feasible choice was adding Tween 20 at a ratio of 0.08 g/g grass in high-solid anaerobic digestion. A kinetics model reliably represented the relationship between surfactant concentration and biogas production. The mechanism of surfactants working on lignocellulose was investigated. The improvement in high-solid anaerobic digestion by adding surfactants was attributed to the interaction between lignocelluloses and surfactants and the extraction of biodegradable fractions from the porous structure. An economic analysis showed that adding Tween 20 was likely to make a profit and be more feasible than adding Tween 60 and polyethylene glycol 300. This study confirms the enhancement in biogas production from horticultural waste by adding non-ionic surfactants.
在批量系统中，广泛研究了添加表面活性剂对园艺废物高固体厌氧消化性能的影响。添加吐温系列和聚乙二醇系列非离子表面活性剂对沼气产量有积极影响，当表面活性剂与草的质量比为 0.20 时，吐温 60 和聚乙二醇 300 分别产生 370.1 毫升/克 VS 和 256.6 毫升/克 VS，而没有表面活性剂的厌氧消化的沼气产量为 107.54 毫升/克 VS。在高固体厌氧消化中，最佳且经济可行的选择是添加 0.08 克/克草的吐温 20。动力学模型可靠地表示了表面活性剂浓度与沼气产量之间的关系。研究了表面活性剂对木质纤维素的作用机制。添加表面活性剂可改善高固体厌氧消化，这归因于木质纤维素与表面活性剂之间的相互作用以及从多孔结构中提取可生物降解部分。经济分析表明，添加吐温 20 比添加吐温 60 和聚乙二醇 300 更有可能盈利且更可行。本研究证实了添加非离子表面活性剂可提高园艺废物的沼气产量。
