摘要
在稳定运行的城市生物质废物厌氧消化中试研究结果基础上,对基质及消化液的有机物粒径分布特征进行解析。在反应器有机负荷为2.4、6.0和8.0 kg VS/(m3·d),停留时间为50、20和15 d 3个状态下,反应器对城市生物质废物有良好的去除效果,VS去除率均在60%以上。其中粒径>96μm的大颗粒有机物去除率均在80%以上,负荷及停留时间对大颗粒有机物的去除效果没有表现出明显影响;随着负荷的增加及停留时间的缩短,消化液中粒径范围0.45~74μm的有机物及溶解性有机物的含量增加,去除率降低;研究结果表明,在传统的厌氧消化条件下,对于本研究中的城市生物质废物而言有机物的酶解过程是主要限速步骤。
Size distribution analysis of municipal biomass waste and the digestate was carried out based on the stable operated anaerobic digestion( AD) system of municipal biomass waste. The AD system achieved a high VS removal rate( > 60%) under OLR of 2. 4,6. 0 and 8. 0 kg VS /( m3·d),which the corresponding HRTs are 50,20 and 15 d,respectively. The results showed that the organics with a particle size of larger than96 μm have a higher removal rate of more than 80%,and organic loading rate( OLR) and hydraulic retention time(HRT) did not show obvious influence on this part of organic particles. The removal rates of particle organic of 0. 45 ~ 74 μm and soluble organic showed a corresponding reduction with the increase of OLR and decrease of HRT. It indicated that under traditional AD condition,enzymatic hydrolysis process is the limiting step of municipal biomass waste degradation.
出处
《环境工程学报》
CAS
CSCD
北大核心
2014年第8期3423-3427,共5页
Chinese Journal of Environmental Engineering
基金
国家"863"高技术研究发展计划项目(2008AA062401)
科技部国际科技合作与交流项目(2010DFA22770)
"十二五"国家科技支撑计划(2012BAC15B02)
关键词
固体废弃物处理处置
城市生物质废物
厌氧消化
粒径分布
solid wastes treatment and disposal
municipal biomass waste
anaerobic digestion
size distribution analysis
