磁性多孔陶粒生物膜反应器处理焦化废水的试验研究

以磁性材料为原料,经过特定的工艺处理,对多孔陶瓷进行磁化改性获得磁性多孔载体,并将该载体应用于生物膜反应器中进行焦化废水处理试验。对不同类型的多孔陶粒载体进行对比试验,结果表明:磁性载体生物膜反应器对COD、NH3-N的去除率比普通活性污泥法高出25%³0%,比非载体生物膜反应器高出15%30%,比非载体生物膜反应器高出15%²0%左右。反应器的曝气量为1.5 L/h,曝气时间为10 h/d,温度为2520%左右。反应器的曝气量为1.5 L/h,曝气时间为10 h/d,温度为25³0℃。焦化废水经磁性载体生物膜反应器处理后,上清液中COD,NH3-N的去除率均在90%左右。出水浓度达到国家工业废水排放二级标准(GB18918-2002)。

Pilot Scale Study on Coking Wastewater Treatment Using a Magnetic Carrier Biofilm Reactor

Porous ceramisite was modified by appropriate process using magnetic material as raw material.The modified porous ceramisite was applied to the treatment of coking wastewater in a biofilm reactor.Results of comparative experiment showed that removal efficiencies for COD and NH3-N in porous ceramisite biofilm reactor were 25%~30% higher than that in activated sludge reactor,and 15%~20% higher than in biofilm reactor without biocarrier.Under conditions of aeration flow 1.5 L/h,aeration duration 10 h/d,temperature 25~30 ℃,removal efficiencies for both COD and NH3-N in porous ceramisite biofilm reactor were about 90%,with the effluent satisfactory to Grade Ⅱ of national emission standard of industrial wastewater GB 18918-2002.