CAJ | 학술논문

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0.5 mL·min~(-1),气室压力为2 kPa时,乙醇的去除率可达86.1%,其中8114%完全氧化,47%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0.5 mL·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.
채용막공양최화양화반응기처리태공창냉응폐수.이을순위목표오염물,연구료막공양최화양화반응기대기적처리효과,병고찰료최화반응대막전질모형적영향.결과표명,수착정류시간적증가,을순적거제솔증대,중간산물을산적생성솔감소.당폐수류량위0.5 mL·min~(-1),기실압력위2 kPa시,을순적거제솔가체86.1%,기중8114%완전양화,47%전화성을산.기우전질모형대실험결과분석표명,최화반응유리우제고막공양총전질계수,당류량위0.5 mL·min~(-1)시,여무최화반응조건상비,양총전질계수제고11.8배.정류시간적증가야유리우제고막공양전질계수.결과표명,막공양최화양화반응기가고효강해냉응폐수중적을순,재태공창냉응폐수처리중유잠재적응용개치.
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 CO_2 and H_2O, 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.