摘要
为资源化处理城市污泥,开发了新型高温微好氧与中温厌氧消化联合工艺(TAD/MAD工艺)。采用该工艺在不同运行参数(污泥停留时间、高温好氧消化温度和进泥浓度)条件下对污泥消化24 d,考察污泥稳定化和产甲烷的效果,并与全程中温厌氧消化工艺和高温微好氧工艺进行对比。结果表明,在55℃高温微好氧消化的停留时间为2 d、35℃中温厌氧消化的停留时间为22 d以及进泥浓度为7.1%条件下,TAD/MAD工艺对VSS的去除率最高、产甲烷量最多。在上述条件下,第24天对VSS的去除率达到42.2%,累积甲烷产量为116.6 m L/g VSS。与全程MAD工艺相比,TAD/MAD工艺具有产气延续性长、累积产甲烷量多、VSS去除率高、达到污泥稳定化时间短的优点,是有效的资源化利用工艺。
A novel combined process of thermophilic micro-aerobic digestion and mesophilic anaerobic digestion （TAD/MAD） was designed to treat sludge. Compared with conventional mesophilic anaerobic digestion process （MAD） and TAD, TAD/MAD process was investigated in the effect of sludge stabilization and methane production during a 24-d digestion period under the different conditions of SRT, temperature in TAD reactor and feed sludge concentration. The results showed that the maximum removal rate of VSS and the maximum methane production could be obtained in TAD/MAD process with 55 ℃ and 2-d SRT for TAD and 35℃, 22-d SRT for MAD and 7.1% feed sludge concentration. As a result, the removal rate of VSS was 42.2% and the accumulative methane production was 116.6 mL/gVSS at 24 d. In comparison with conventional MAD process, TAD/MAD process has characteristics of longer duration time for methane production, more methane production, higher removal rate of VSS and shorter stabi lization time, which is an effective and resource utilization process.
出处
《中国给水排水》
CAS
CSCD
北大核心
2016年第9期1-7,共7页
China Water & Wastewater
基金
江苏省省级环境保护科研项目(2013029)
江苏省太湖水污染治理专项资金(第七期)资助项目(JSZC-G2013-177)
关键词
高温微好氧消化
中温厌氧消化
污泥稳定化
累积产气量
污泥资源化
thermophilic micro-aerobic digestion
mesophilic anaerobic digestion
sludge stabilization
accumulative biogas production
sludge resource utilization
