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通过中试考察了改性蜂窝陶瓷催化臭氧氧化(催化氧化)—活性炭过滤的净水效果,并与臭氧—活性炭工艺进行比较。试验条件下蜂窝陶瓷催化剂在静态和动态条件下均不会促进气体向水中的传质;静态条件下催化氧化对水中有机物的去除效率比臭氧单独氧化高;动态试验中,催化氧化对UV254的去除率高于臭氧氧化,但对TOC的去除没有优势,与臭氧氧化相比催化氧化有利于后续活性炭对有机物的去除。GC/MS测定表明,催化氧化及其后续活性炭出水中半挥发性有机物种类分别比臭氧单独氧化少9%和32%。经Ames试验发现,两种氧化及其后续活性炭处理后水的致突变活性均有微小增加。 相似文献
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随着我国污泥无害化和资源化工作的深入推进,污泥炭化技术受到持续关注并完成了较多工程实践;该技术在资源循环、污染物控制和碳减排等方面具有优势。在综述炭化技术特点、炭化物性质、烟气污染物产生机理的基础上,以国内外项目设计运行统计数据为基础,对炭化物应用、烟气污染物标准选择、碳减排评估等工作进行系统总结。污泥炭化理论和实践日趋成熟,项目运行稳定,炭化产物可以作为燃料、建材和土壤改良剂等形式实现资源化利用,在运行过程及全生命周期分析中均具有碳减排优势。 相似文献
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Catalytic ozonation with coal-based activated carbon ( carbozone) followed by GAC ( granular activated carbon) filtration was compared with ozone-GAC process for water purification. Songhua River water pretreated with traditional processes was used as influent in the continuous-flow experiments. The carbozone-GAC process performed better than the ozone-GAC process during the 9. 5-months operation period. The organic removal rate in carbozone was found to be very high in the initial operation period,and then gradually decreased to a steady level. At the steady state of operation,the average removal rates of permanganate index ( PI) and UV254 were 25. 8% and 67. 8% in carbozone,and 6. 6% and 53. 7% in ozonation alone,respectively. The carbozone process also achieved a higher DOC removal than ozonation alone,and moreover,the number of semi-volatile organic compounds detected with GC/MS decreased from 44 to 28 in carbozone and 34 in ozonation alone,respectively. The catalyst surface became more acidic during the long-term operation with its pHPZC( pH at which its surface is zero charged) decreased from 7. 0 to 6. 2. In addition,the physical characteristics of the catalyst were also changed during the operation. 相似文献
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臭氧氧化中试实验装置的设计与安装 总被引:1,自引:0,他引:1
随着水环境污染的加剧和水质标准的提高,氧化能力强且安全性高的臭氧氧化工艺被越来越多地应用于饮用水处理工艺中。在臭氧氧化工艺的设计及运行过程中,通常用中试实验模型预测其处理效果及确定运行参数。臭氧中试实验装置的设计与安装是一项复杂的工作,它既要将输水管路系统、臭氧氧化反应器及臭氧发生系统等有机地组合,又要保证实验中各项运行参数能在一定范围内灵活调整。虽然臭氧氧化工艺已有许多应用实例,但是对于臭氧氧化中试实验的设计及安装中存在的具体问题报道较少,我们在某水厂臭氧氧化中试实验工作上取得了一些经验,希望和大家分享。 相似文献