加压富氧生物活性炭在碱减量印染废水深度处理中的应用研究

Experimental research on application of PRBAC process for advanced treatment of printing and dyeing wastewater

加压富氧生物活性炭法(PRBAC)是在生物活性炭法(BAC)的基础上发展的一种新方法。它通过在生物活性炭柱中增加压力,提高溶解氧浓度以强化生物作用来提高污染物的去除率。试验证明,对碱减量印染废水二级生化处理出水进行深度处理,加压富氧生物炭能保持对水中多种污染物的高去除率,且出水中COD,BOD,NH_3-N,SS,色度,浊度等指标均达到生活杂用水水质标准,其中NH_3-N的去除率可达97％以上。

Pressurized reactor-biological activated carbon (PRBAC) process, a new development based on conventional biological activated carbon (BAC) process, is more effective for pollutant removal by way of stronger biological activity strengthened by increased DO level inside the activated carbon column at pressured state. The experimental results show that it is very successful of PRBAC process in advanced treatment of the secondary effluent of alkali decrement wastewater from a printing-dyeing mill, and high removals for multi-pollutants have been obtained, in which the NH3 - N removal is more than 97% . Moreover, in the final effluent all the important indicators such as COD, BOD, NH3 - N, SS, colourity and turbidity are quit enough to meet the requirement of national water quality standard for domestic miscellaneous use.