高效底泥循环回流技术在硫铁矿酸性废水处理的应用

摘要

Using high density sludge(HDS)technology to treat pyrite acid wastewater, the results showed that,when the pH value of the reaction was 8.5-9.0,the mixed reaction time was 40 min, the aerated gas-water ratio was 4 : 1, the refulx ratio of sediment was 12% - 15%, the total amount of iron, manganese and zinc of the effluent water could meet the discharge requirement of grade 1 in GB 8978—1996 Integrated Wastewater Dis-charge Standard,the sediment concentration could reach above 25%.%采用高效底泥循环回流技术(HDS技术)处理某硫铁矿酸性废水.结果表明,当反应pH值为8.5~9.0、混合反应时间为40 min,曝气气水比为4:1、底泥回流比为12%~15% 时,出水总铁、锰和锌能够满足 GB 8978—1996《污水综合排放标准》中一级排放标准的要求,底泥浓度达到25%以上.