餐厨垃圾中高温厌氧发酵的产沼动力学模拟及比较研究  

Kinetic Modelling and Camparision on Biogas Production of Mesophilic and Thermophilic Anaerobic Digestion of Food Waste

作　　者：施宇森 应李广 黄顺寅 俞奔 洪钰婷 曹玉成[1] Shi Yusen(College of Environment and Resources,Zhejiang Agriculture and Forestry University,Hangzhou 311300,China)

机构地区：[1]浙江农林大学环境与资源学院,浙江杭州311300

出　　处：《安徽农学通报》2020年第13期155-158,共4页Anhui Agricultural Science Bulletin

基　　金：浙江省大学生科技活动创新计划(新苗人才计划)(2019R412009)。

摘　　要：通过批式试验研究了中温和高温2种工艺温度下餐厨垃圾厌氧发酵沼气产率及其动力学特征。结果表明:试验第33天,中温和高温处理系统比沼气产率分别达到706.14L/kg、897.80L/kg。Transference模型、修正的Gompertz模型和修正的Logistic模型均可以用来模拟餐厨垃圾中高温发酵产沼动力学过程,其中Gompertz模型具有更高的拟合度(R2>0.99),预测值与实验观测值之间的吻合程度更高(相对均方根误差RRMSE<0.03,模型效率ME>0.99)、拟合求得的中温和高温系统最大沼气产气潜能分别为0.43m^3·d^-1、0.64m^3·d^-1,产气迟滞期分别为4.65d、3.65d,表明高温处理系统的产沼性能优于中温处理系统。In this study,a batch experiment was conducted to study specific biogas production and kinetic characteristics of the anaerobic digestion of food waste at mesophilic and thermophilic conditions.Three kinetic models including the transference model,the modified gompertz model and the modified logistic model were considered to evaluate the biogas yield potential,the maximum biogas production rate and the duration of lag phase.Values of the specific biogas production were found to be 706.14 L/kg for the mesophilic process and 897.80 L/kg for the thermophilic process.The three kinetic models were proven to be suitable for predicting the biogas production of the two digstion process systems,and the modified Gompertz model was the best approach to fitting the experimental results(R^2>0.99,RRMSE<0.03 and ME>0.99).According to the modified Gompertz model,the maximum biogas production rate and the duration of lag phase were estimated as 0.43 m^3/d and 4.65 d for the mesophilic process,respectively,and as897.80 L/kg and 0.64 m^3/dfor the thermophilic process,respectively.The results indicated that the thermophilic digestion treatment of food waste could be better than the mesophilic digestion treatment in biogas production performance.

关 键 词：餐厨垃圾 厌气发酵 比沼气产率 动力学模拟 

分 类 号：TS201.2[轻工技术与工程—食品科学]