造纸清洁漂白技术水污染预防效果验证评价

Verification of Water Pollution Prevention Effects of Pulp Clean Bleaching Technology

为验证制浆造纸清洁漂白技术--无元素氯漂白(ECF)技术的水污染预防效果,通过环境保护技术验证评估(Environmental Technology Verification,ETV)的程序和方法,对某制浆造纸厂的无元素氯漂白技术进行以现场实际测试为基础的验证评价。验证结果显示:单位纸浆可吸附有机卤素(AOX)产生量低于0.6 kg·t-1(风干浆);生产蔗渣浆时,单位产品中段水产生量低于23 m3·t-1(风干浆)。AOX产生量受到二氧化氯用量的影响,当二氧化氯投加过量时,AOX有超标的风险。

In order to verify the water pollution prevention effects of elemental chlorine free bleaching (ECF) for pulp and paper making,through ETV procedures and methods,based on the on-site test on ECF technology of pulp and paper mill.Verification results show that the AOX production per unit pulp is less than 0.6 kg·t-1 (air-dried pulp).When producing bagasse pulp,the mid-stage waste water is less than 23 m3·t-1 (air-dried pulp).The production of AOX is affected by the amount of chlorine dioxide.When chlorine dioxide is added in excess,AOX may exceed the standard.