化肥生产综合废水回用处理工艺技术比较试验研究

为了寻求通用的以天然气为原料的化肥生产综合废水处理回用技术,试验采用膜生物反应器(MBR)、曝气生物流化床(ABFT)和曝气生物滤池(BAF)三种工艺对去除生产废水中的COD、NH3-N、硝酸盐氮的效果进行了比较。试验结果表明,三种工艺处理出水NH3-N的质量浓度均小于10 mg/L,达到设计要求;MBR和BAF处理出水COD的质量浓度低于30 mg/L,也满足要求,ABFT处理出水COD超标,三种工艺对硝酸盐氮的去除率都不高,脱氮不彻底。本试验为工程设计提供了技术参考。

A comparison among processes for treatment and reuse of wastewater from chemical fertilizer plants

In order to find a proper process for treatment and reuse of synthetic wastewater from chemical fertilizer plants which use natural gas as material,a comparative test among the efficiencies of MBR,ABFT and BAF on COD,NH3-N and nitrate nitrogen removal was carried out.The results of the test showed that,the effluent NH3-N concentration from the above three processes treatment were lower than 10 mg/L,which met the design demand;the effluent COD concentration from MBR and BAF treatment were lower than 30 mg/L,...