摘要
利用温室-太阳能热水器组合增温工艺提高和保持厌氧消化反应器的消化温度,实现厌氧消化反应器在中温(春、秋、冬季)和高温(夏季)条件下高效稳定运行。以剩余污泥为原料,考察了该组合工艺一年四季的保温效果和污泥厌氧消化产气性能,并对各季节的能源产出和消耗情况进行对比分析。结果表明:与自然环境下的反应器I相比,温室内反应器II的温度在春夏秋三季分别提高了13.0～28.5℃、15.0～26.5℃和10.7～12.2℃,具有良好的增温和保温效果。春夏秋三季污泥厌氧消化的累积产气量分别提高了176.1%、98.8%和109.9%;总固体(TS)和挥发性固体(VS)去除率分别提高了6.8%～27.1%和7.5%～24.1%。通过能源产出和消耗情况分析,发现反应器II在春夏秋三季度的能源转化效率比反应器I提高了21.0%、38.5%和30.3%,冬季的耗能大于产能,但能保证厌氧消化的持续高效运行。
Integrated system of greenhouse and solar heater （ISGSH） was used for heating and maintaining the required temperature for mesophilic digestion （in spring,autumn,and winter） and thermophilic digestion （in summer）.Using excess activated sludge as influent,heat insulation effect of ISGSH,biogas production in the anaerobic digestion,and the energy output and consumption were investigated in four different seasons.The results indicated that relative to the reactor I operated under natural conditions, the temperatures in reactor II with the integrated system were increased by 13.0-28.5℃, 15.0-26.5℃, and 10.7-12.2 ℃, respectively, in spring, summer and autumn. Meanwhile, the biogas production, total solids（TS）and volatile solids （VS） removal rates were increased by 176.1%, 98.8%, and 109.9%, 6.8%-27.1%, and 7.5%-24.1%, respectively in spring, summer and autumn. Through the analysis of energy output and consumption in ISGSH, it was found that the energy conversion efficiencies in reactor II were enhanced by 21.8%, 38.5%, and 30.1% for spring, summer, and autumn, respectively. Although the energy consumption was higher than the energy output in winter, the ISGSH can realize the effective operation of anaerobic digestion.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2009年第9期210-214,共5页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家863计划项目(2006AA10Z425)
关键词
温室
太阳能热水器
厌氧消化
沼气
污泥
greenhouses
solar water heaters
anaerobic digestion
biogas
sludge
