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项目名称 催化湿式氧化处理高浓度难降解有机废水技术
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技术项目名称 催化湿式氧化处理高浓度难降解有机废水技术
行业分类 一级    二级    三级 
战略性新兴产业分类 一级    二级    三级 
6+1产业分类
权属人所属地域 省    市    区 
项目权属 (个人或单位名称) 中国科学院大连化学物理研究所
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催化湿式氧化法是在湿式氧化法基础上于八十年代中期国际上发展起来的一种治理高浓度有机废水的先进环保技术。是在一定的温度、压力和催化剂的作用下,经空气氧化,使污水中的有机物及氨分别氧化分解成CO2 H2ON2等无害物质,达到净化的目的。催化湿式氧化法具有净化效率高,流程简单,占地面积小等特点,有广泛的工业应用前景。催化湿式氧化适用于治理焦化、染料、农药、印染、石化、皮革等工业中含高化学需氧量或含生化法不能降解的化合物(如氨氮、多环芳烃、致癌物质BAP等)的各种工业有机废水。

Catalytic wet air oxidation (CWAO), which was developed in 1980s based on wet air oxidation (WAO), is considered to be effective to the degradation of highly concentrated contaminants as an emerging technique. With the assistance of catalysts under high temperature and pressure, the organics could be mineralized or converted into easily biodegraded products by the oxidation of air. The advantages of CWAO process relative to other techniques include the possibility of simultaneous removal of organics and nitrogen/sulfur compounds in only hours, a compact plant design for low space requirements and no secondary pollutants including sludge and ashes. Compared with WAO, the employment of efficient catalysts in CWAO makes it possible to achieve better results under the relaxed conditions. Therefore, CWAO is always utilized to treat various wastewaters with complex composition and highly concentrated refractory compounds discharged from the industries such as coking, petrochemistry, pesticide manufacturing and food processing.

CWAO reaction is generally carried out at temperatures between 150 and 320 oC under pressures ranging from 5 to 200 bars in the presence of heterogeneous catalyst. The economical efficiency of CWAO depends on the characteristics of wastewater and treatment requirements. The running cost of CWAO is close to being competitive with or even lower than that of biological process from the view of the reduced CODCr per kilogram per unit time, especially for the wastewater with high COD value of over ten thousands. The wastewater with COD of over 20,000 mg/L could be treated without supplying any auxiliary fuel that significantly reduces the investment and running costs.


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