催化湿式氧化法和厌氧发酵法联用处理异佛尔酮废水  

Treatment of isophorone wastewater by catalytic wet air oxidation and anaerobic digestion

作　　者：闫晓淼[1,2] 卫皇曌[1] 杨旭[1] 何松波[1] 李敬美[1] 孙承林[1] 

机构地区：[1]中国科学院大连化学物理研究所,辽宁大连116023 [2]中国科学院研究生院,北京100049

出　　处：《工业催化》2012年第11期69-75,共7页Industrial Catalysis

基　　金：国家高技术研究发展计划(863计划)项目(2009AA063903);国家重点基础研究发展计划(973计划)项目(2009CB421606)

摘　　要：分别以沉淀法、共沸蒸馏法和高温老化法制备ZrO2载体,采用等体积浸渍法制备Ru/ZrO2催化剂,用于催化湿式氧化法处理异佛尔酮废水。研究了反应温度、催化剂用量及反应时间对异佛尔酮废水乙酸浓度、COD去除率、TOC去除率及废水可生化性的影响。废水经催化湿式氧化处理的中间产物主要为乙酸,可由产甲烷菌转化为甲烷。结果表明,提高反应温度、增加催化剂用量及延长反应时间均可提高异佛尔酮废水COD去除率、TOC去除率及废水可生化性。在270℃、氧分压2.5 MPa和催化剂用量9 g.L-1条件下,超过180 min异佛尔酮废水COD及TOC去除率分别可达90.4%和84.9%。在270℃、氧分压2.5 MPa和催化剂用量1 g.L-1反应条件下,120 min时异佛尔酮废水乙酸浓度最大,为5 582.98 mg.L-1。催化湿式氧化处理后出水利用产甲烷菌进行厌氧发酵,反应9天产甲烷体积达到最大值820 mL。ZrO2 supports were prepared by the precipitation method, azeotropic distillation method and high temperature aging method, respectively. Ru/ZrO2 catalyst was prepared by incipient impregnation method, and was applied in the treatment of isophorone wastewater by catalytic wet air oxidation. The effect of reaction temperature, catalyst dosage and reaction time on the yield of acetic acid, remora! rate of COD and TOC and biodegradability was investigated. The main intermediate in the treatment of isophorone wastewater by catalytic wet air oxidation was acetic acid, which could be converted to methane by meth- anogen. The results showed that the removal rate of COD and TOC and biodegradability of isophorone wastewater were increased by enhancing reaction temperature and catalyst dosage, and prolonging reaction time. The removal rate of COD and TOC of isophorone wastewater reached 90.4% and 84.9% under the reaction condition as follows ： reaction temperature 270℃, O2 pressure 2.5 MPa, catalyst dosage 9 g · L- 1 , and reaction time 180 min. Under the reaction condition of reaction temperature 270℃, O2 pressure 2.5 MPa,reaction time 120 min and catalyst dosage 1 g · L-1 ,acetic acid yield in the treatment of isophor- one wastewater reached the maximum value （5 582.98 mg· L-1 ）. The wastewater treated by catalytic wet air oxidation was treated deeply with methanogen via anaerobic digestion, and CH4 volume attained the maximum 820 mL after the reaction for 9 days.

关 键 词：催化化学 催化湿式氧化 异佛尔酮 Ru ZRO2 厌氧发酵 乙酸 甲烷 

分 类 号：X703.1[环境科学与工程—环境工程] TQ426.94[化学工程]