温度和物料配比对餐厨垃圾与果蔬垃圾协同厌氧产氢的影响研究

摘要

The variation of pH,ammonia nitrogen,reducing sugar and soluble COD during combined anaerobic of kitchen waste and fruit-vegetable waste,as well as the kinetic analysis and correlation analysis were carried out to investigate the effects of temperature and raw materials ratio(wet mass ratio of kitchen waste and fruit-vegetable waste)on the hydrogen production potential.The results showed that both temperature and raw material ratio had significant impact on the anaerobic hydrogen production.Thermophilic anaerobic fermentation(55 ℃)with raw material ratio of 1:4 achieved the highest cumulative biogas production and hydrogen volume proportion of 510 mL and 52.57%,while mesophilic anaerobic fermentation(35 ℃)achieved the highest cumulative biogas production of 200 mL when raw material ratio was 1:2 and the highest hydrogen volume proportion of 5.45% when raw material ratio was 1 : 1.The correlation analysis revealed that pH and cumulative biogas production was significant negative correlated,while ammonia nitrogen and cumulative biogas production was significant positive correlated.Therefore, thermophilic anaerobic fermentation hydrogen production could improve the substrate utilization,microorganisms activity and hydrogen production potential of kitchen waste and fruit-vegetable waste,achieving the aim of organic waste energy utilization.%采用餐厨垃圾和果蔬垃圾协同厌氧产氢工艺,通过pH、氨氮、还原糖、溶解性COD(SCOD)等指标变化规律、产氢动力学和相关性分析,研究不同温度和物料配比(餐厨垃圾与果蔬垃圾的湿质量比)对协同厌氧产氢潜力的影响.结果表明,温度和物料配比对餐厨垃圾和果蔬垃圾协同厌氧产氢均有显著影响.高温组(55 ℃)物料配比为1:4时累积产气量和氢气体积分数最大,分别为510 mL 和52.57%;中温(35 ℃)组物料配比为1:2时累积产气量最大为200 mL,物料配比为1: 1时氢气体积分数最大为5.45%.相关性分析表明,pH与累积产气量呈显著负相关,氨氮与累积产气量呈显著正相关.高温协同厌氧产氢可有效提高微生物活性和产氢潜力,促进餐厨垃圾和果蔬垃圾的有效利用,实现有机废弃物的绿色能源化.