摘要
采用膜供氧催化氧化反应器处理太空舱冷凝废水。以乙醇为目标污染物,研究了膜供氧催化氧化反应器对其的处理效果,并考察了催化反应对膜传质模型的影响。结果表明,随着停留时间的增加,乙醇的去除率增大,中间产物乙酸的生成率减少。当废水流量为0.5mL·min-1,气室压力为2kPa时,乙醇的去除率可达86.1%,其中81.4%完全氧化,4.7%转化成乙酸。基于传质模型对实验结果分析表明,催化反应有利于提高膜供氧总传质系数,当流量为0.5mL·min-1时,与无催化反应条件相比,氧总传质系数提高11.8倍。停留时间的增加也有利于提高膜供氧传质系数。结果表明,膜供氧催化氧化反应器可高效降解冷凝废水中的乙醇,在太空舱冷凝废水处理中有潜在的应用价值。
The aim of our research is to degrade ethanol in manned spacecraft condensate wastewater using a fixed bed catalytic reactor of membrane aeration. The removal rate and degradation products of ethanol were analyzed experimentally, and the influence of a catalytic reaction on the mass transfer was simulated with a numerical model. It was found that the removal rate of ethanol increased and the generation rate of acetic acid decreased as the liquid hydraulic retention time increased. The removal rate of ethanol was 86.1% when wastewater flow rate was 0.5 mL·min-1, 81.4 percent of ethanol was oxidized to CO2 and H2O, and 4.7 percent of ethanol was oxidized to acetic acid. Results show that catalytic reaction condition had a deep influence on the mass transfer coefficient. The mass transfer coefficient was 11.8 more than that without catalytic reaction, as the liquid flow rate was 0.5 mL·min-1. The increase of liquid hydraulic retention time could also improve the mass transfer coefficient. The results suggested that the catalytic reactor of membrane aeration has the potential application as a new tool for treating condensate wastewater.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2010年第2期197-202,共6页
Chinese Journal of Inorganic Chemistry
基金
国家高技术研究发展计划资助项目(No.2007AA703502B)
关键词
膜供氧
冷凝废水
催化氧化
乙醇
membrane aeration
condensate wastewater
catalytic oxidation
ethanol
