摘要
为探究温度和青贮处理对杂交狼尾草和餐厨垃圾混合厌氧发酵性能动力学特性的影响,在不同温度(中温37℃,高温55℃)和不同青贮(0 d,90 d)条件下进行序批式试验,研究温度和青贮对二者混合厌氧发酵系统性能影响,并通过3种动力学模型进行对比分析。结果表明,温度相较于青贮处理对系统pH值和系统运行性能影响较大。对于原料产气率,鲜草和餐厨垃圾混合发酵系统在高温条件下具有更好的产气性能,较中温时提高了74.85%;而青贮草和餐厨垃圾混合发酵系统在中温条件下产气性能更优,较鲜草组提高了94.51%。采用修正的Gompertz方程,Logistic方程和Transference方程对原料产气速率进行动力学分析发现,修正的Gompertz模型拟合程度最高,其中鲜草与餐厨垃圾在高温条件下混合厌氧发酵时具有最大的产气潜能和产气速率,其值分别为364.25±2.46 mL·g^(-1)VS和109.85±5.29 mL·g^(-1)VS·d^(-1);青贮草与餐厨垃圾混合发酵系统在中温条件下获得最大的产气潜能为363.47±10.65 mL·g^(-1) VS。
In order to explore the effects of temperature and silaging on the anaerobic co-digestion performances of hybrid Pennisetum and kitchen waste,sequence-batch experiments were carried out at different temperatures(37℃,55℃)and different silaging conditions(0 d,90 d),and three kinds of kinetic models were used for comparative analysis.The results showed that,comparing with the silaging treatment,the temperature had a greater influence on pH value and system performance.In terms of raw material gas production rate,the mixed fermentation system of fresh grass of Pennisetum and kitchen waste had better gas production performance under high temperature,which was 74.85%higher than that under medium temperature.However,the mixed fermentation system of silage Pennisetum and kitchen waste had better gas production performance under medium temperature,which was increased by 94.51%compared with the fresh grass group.The modified Gompertz equation,Logistic equation and Transference equation were used for kinetic analysis of raw material gas production rate,and found that modified Gompertz model had the best fit.The mixed anaerobic fermentation of fresh grass and kitchen waste under high temperature condition had the highest gas production potential and gas production rate,the values were 364.25±2.46 mL·g^(-1)VS and 109.85±5.29 mL·g^(-1)VS·d^(-1),respectively.The mixed fermentation system of silage grass and kitchen waste obtained the maximum gas production potential of 363.47±10.65 mL·g^(-1)VS under medium temperature conditions.
作者
沃德芳
孙永明
余德才
郭磊
孔晓英
蒋恩臣
WO De-fang;SUN Yong-ming;YU De-cai;GUO Lei;KONG Xiao-ying;JIANG En-chen(Key Laboratory for Biobased Materials and Energy of Ministry of Education,College of Materials and Energy,South China Agricultural University,Guangzhou 510642,China;Guangzhou Institute of Energy Conversion,CAS,Guangzhou 510640,China)
出处
《中国沼气》
2021年第4期39-46,共8页
China Biogas
基金
中国科学院战略性先导科技专项(XDA21050400)
广东省科技计划项目(2017B020238005)
江西省重点研发项目(20171ACG70020)
广州市科技计划项目(201803030007)。
