催化湿式氧化法处理糖蜜酒精废液的研究

以非贵金属Cu、Fe、Mn和Ce为主要活性成分和TiO2、-γA l2O3为载体,制备了10种用于催化湿式氧化法处理糖蜜酒精废液的催化剂。考察了载体、焙烧温度、成分配比对催化剂催化活性与稳定性的影响,研究了氧气分压、催化剂投加量、反应温度和反应时间对催化湿式氧化过程的影响规律。结果表明:(1)Fe-Mn/-γA l2O3(3∶1∶1)催化剂是催化湿式氧化法处理糖蜜酒精废液的可选催化剂;(2)适宜的氧气供应量为理论需氧量的3.4~4.6倍,催化剂的投加量以10 g/L为佳;在300℃下反应30 m in或在280℃下反应60 m in,处理水可达到污水综合排放标准GB9878-1996的三级标准。     

Preparation and characterization of Fe2O3-CeO2-TiO2/γ-Al2O3 catalyst for degradation dye wastewater

In order to develop a catalyst with high activity for catalytic wet oxidation (CWO) process at room temperature and atmospheric pressure, Fe2O3-CeO2-TiO2/γ-Al2O3 catalyst was prepared by consecutive impregnation method and the prepared parameters were optimized. The structure of the catalyst was characterized by BET, XRF, SEM and XPS technologies, and the actual wastewater was used to investigate the catalytic activity of Fe2O3-CeO2-TiO2/γ-Al2O3 in CWO process. The experimental results showed that the prepared catalyst exhibited good catalytic activity when the doping amount of Ti was 1.0 wt% (the weight ratio of Ti to carriers), and the middle product, CeO2-TiO2/γ-Al2O3, was calcined in 450℃ for 2 h. The CWO experiment for treating actual dye wastewater indicated that the COD, color and TOC of actual wastewater were decreased by 62.23%, 50.12% and 41.26% in 3 h,respectively, and the ratio of BOD5/COD was increased from 0.19 to 0.30.     

Preparation and characterization of Fe2O3-CeO2-TiO2/γ-Al2O3 catalyst for degradation dye wastewater

In order to develop a catalyst with high activity for catalytic wet oxidation （CWO） process at room temperature and atmospheric pressure, Fe2O3-CeO2-TiO2/γ-Al2O3 catalyst was prepared by consecutive impregnation method and the prepared parameters were optimized. The structure of the catalyst was characterized by BET, XRF, SEM and XPS technologies, and the actual wastewater was used to investigate the catalytic activity of Fe2O3-CeO2-TiO2/γ-Al2O3 in CWO process. The experimental results showed that the prepared catalyst exhibited good catalytic activity when the doping amount of Ti was 1.0 wt% （the weight ratio of Ti to carriers）, and the middle product, Fe2O3-CeO2-TiO2/γ-Al2O3, was calcined in 450℃ for 2 h. The CWO experiment for treating actual dye wastewater indicated that the COD, color and TOC of actual wastewater were decreased by 62.23%, 50.12% and 41.26% in 3 h, respectively, and the ratio of BOD5/COD was increased from 0.19 to 0.30.     

催化湿式氧化处理碱渣废水的研究

以催化湿式氧化 (CWO)技术对碱渣废水进行治理 ,考察了各种反应条件对废水处理效果的影响。结果表明 ,在 2 30℃ ,6 6MPa ,空速 8h-1的反应条件下 ,CODCr的去除率 78% ,硫的去除率达到 99% ,BOD5/CODCr超过 0 8,并对CWO处理后的尾气进行了分析 ,表明除空气和CO2 以外没有其它有害气体。     

湿式催化氧化法(CWO)处理高浓度有机废水研究

通过引进、消化、吸收日本大阪煤气公司先进的CWO高浓度生化难降解工业有机废水处理技术及对该技术的国产化研究,自主设计、制造、集成建设和运行了一套20m3/dCWO技术工业应用装置,试验结果表明,该装置对造纸黑液和焦化废水等有机废水具有良好的净化处理性能,CODcr、NH3-N等的去除率均达99%以上,且脱色、脱臭效果明显.     

CWO技术处理高浓度焦化废水的工业应用研究

采用 2 0 0 L/ d CWO小型工业试验装置对高浓度焦化废水进行处理试验研究 ,结果表明 CWO技术装置对处理高浓度焦化废水 (CODCr,10 0 0 0～ 130 0 0 mg/ L、NH3- N12 0 0～ 2 10 0 mg/ L)具有良好的技术可行性 ,废水经处理后 (催化反应时间 30～ 4 5 min) ,废水中 CODCr、NH3- N的去除率即可达到 99%以上 ,处理水中的 CODCr、NH3- N浓度均可达到国家排放标准 (CODCr<10 0 mg/ L、NH3- N<15 mg/ L ) ,且废水的脱色、除臭效果明显。对于不同浓度焦化废水的处理 ,CWO技术及装置表现出了很好的适应性。国产化 2 0 m3/ d CWO工业装置对焦化废水的连续处理运行表明 ,CWO技术在国内已达到工业化应用水平 ,并具有较好的经济性。