摘要
为研究渗滤液回灌和温度对填埋垃圾产CH4的影响,在不同温度下,通过对3个已进入产CH4期的厌氧型生物反应器实施不同的回灌操作,并根据ρ(CODCr)和产CH4速率的监测数据,建立了厌氧型生物反应器固相垃圾的水解模型.产CH4速率的模型计算的模拟值与D1,D2和D3柱实测值的相关系数分别为0.895 5,0.809 1和0.915 6,具有较高的可靠性.其中保持较高的产CH4速率且恒定温度的D2柱的固相垃圾水解系数是D1柱的12倍左右;同时随着回灌频率的降低,D3柱水解速率系数从0.007 6降到0.002 7,与D1柱的相对差也逐渐增大.保持较高的温度(35℃左右)和较高回灌频率有利于固相垃圾的水解和厌氧型生物反应器的快速稳定.
In order to study the influence of leachate recirculation and temperature on methane fermentation in landfills,a hydrolytic kinetics model was set up based on detecting and analyzing the concentration of CODCr in leachate and the rate of methane fermentation in three simulated modes of an anaerobic,methane producing bioreactor.The model is operated by different methods of leachate recirculation at different temperatures.The results showed that the correlation coefficient between computational value and experimental value of D1,D2 and D3 columns were（0.8955,）（0.8091） and（0.9156,） respectively,with high reliability.Additionally,the hydrolytic coefficient of D2 of high methane fermentation rate and stable temperature was about 12 times D1＇s of room temperature.The hydrolytic velocity coefficient of D3 fell from（0.0076） to（0.0027） with decreasing frequency of recirculation,and the relative difference between D3 and D1 increased.High temperature（about（35 ℃）） and high frequency of recirculation can enhance hydrolyzation of waste and stabilization of an anaerobic bioreactor.
出处
《环境科学研究》
EI
CAS
CSCD
北大核心
2009年第3期299-303,共5页
Research of Environmental Sciences
基金
西南交通大学大学生科技创新基金项目(2005014)
关键词
动力学模型
水解
回灌频率
温度
厌氧型生物反应器
产CH4期
kinetics model
hydrolyzation
recirculation frequency
temperature
anaerobic bioreactor
methane fermentation phase
