中小型电镀厂镀锌废水处理的工艺实践

Practice of Zinc-Plating Wastewater Treatment at Middle and Small Plating Plants

电镀废水的处理方法主要有离子交换法、电解法、活性炭法、反渗透法等。这些方法在多镀种、大规模、精度高的情况下适用,对于单镀种、建筑用材来说,往往会受到设备投资大、处理成本高、厂房占地等因素限制,起不到既经济,又能达到处理效果的目的。文章提出了直接用化学沉淀法处理镀锌废水的方法,实践结果表明,该工艺完全可行,处理出水能够达标排放且运行费用较低,适宜推广应用。

Treatment technology of Zinc-Plating wastewater mainly includes ion exchange, electrolysis, active carbon and RO. Because of high amount invested and occupying large land, these technologies are suitable for multi-coating plating, massive production and high precision.In the paper, reduction-flocculation precipitation process for the treatment of electroplating wastewater was established. The practice proved that it was completely feasible to treat the wasteveater, the effluent could reach the discharge standard, and the operation cost was low.