【摘要】 在自行研制的滴流床反应器中,以MnOx/γ-Al2O3为催化剂,研究了反应温度、进水有机物浓度、液体流率等主要工艺参数对酸化中和预处理后的碱渣废水催化湿式氧化效果的影响。结果发现反应温度和液体流率对氧化反应效果的影响显著:温度升高,反应速率加快;液体流率越慢,反应效果越好。在滴流床处理碱渣废水最开始连续运转的15 h中出水中金属离子溶出现象比较严重,但随后趋于稳定,催化剂的活性并没有受到影响。由于滴流床中高的催化剂-液相比,废水在滴流床中表现出高的降解速率。更多还原

【Abstract】 The influence of major technical parameters,such as reaction temperature,feed organic concentration of wastewater,liquid flow rate etc.On the effect of catalytic wet oxidation(CWO) of spent caustic wastewater pretreated through acidification and neutralization was investigated in the trickle bed reactor(TBR) which was filled with catalyst MnOx/γ-Al2O3.The result indicated that temperature and liquid flow rate were two key factors that influence the reaction.The rate of reaction could be greatly increased with an increase of temperature,and the slower the liquid flow ratet,he better the performance.High dissolution of metal ions in the first 15hr of continuous operation time was found,but was stabilized later and did not afffect the activity of the catalysts.The high catalyst-liquid ratio in the trickle-bed resulted in very fast reaction rate of spent caustic wastewater.更多还原