摘要:
以焦化废水为研究对象,在微波辐射下,以碳化硅为吸波介质,通过改变微波加热温度、碳化硅种类及用量,分析了微波与碳化硅共同处理对废水中pH值和COD的影响规律。试验结果表明,时间一定时,微波温度增加能大幅度降低焦化废水的pH值,处理后焦化废水的pH值接近中性,微波温度90℃时,焦化废水pH为7.78;提高微波加热温度也有利于COD的去除,加热温度为90℃时,COD最高去除率为23%。绿碳化硅与微波协同处理能更好的降低焦化废水的pH,绿碳化硅质量为5 g时,pH为7.89;与绿碳化硅相比,黑碳化硅能更好提高COD去除率,COD最高去除率为25%。
关键词:
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焦化废水 /
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pH /
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COD /
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微波 /
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碳化硅
Abstract:
In this paper the effect of microwave irradiation and silicon carbide absorbing microwave on the pH and COD of coking wastewater had been studied by changing the microwave heating temperature,the type and amount of silicon carbide.When the time is fixed,the increase of microwave temperature can significantly reduce the pH of the coking wastewater.The pH of the coking wastewater after treatment is close to neutral.When the microwave temperature is 90 ℃,the pH of the coking wastewater is 7.78.Increasing microwave heating temperature helps to remove COD.The highest COD removal rate was 23% at a heating temperature of 90 ℃.The co-treatment of green silicon carbide and microwave can achieve the better effect of reducing the pH of coking wastewater.When the mass of green silicon carbide is 5 g,the pH is 7.89.Compared with green silicon carbide,black silicon carbide has achieved better effect of improving the removal rate of COD and the highest COD removal rate is 25%.
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