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说说酸碱废水处理时需要注意什么?

作者:伟嘉环保来源:伟嘉环保 日期:2018年10月1日 18:43
酸碱废水具有较强的腐蚀性,如不经治理直接排出,会腐蚀管渠和构筑物,排入水体,会改变水体的pH值,干扰,并影响水生生物的生长和渔业生产,排入农田,会改变土壤的性质,使土壤酸化或盐碱化,危害农作物。所以酸碱废水应尽量回收利用,或经过处理,使废水的pH值处在6~9之间,才能排入水体。那么酸碱废水处理时需要注意什么呢?让我们一起看一下吧。
1、高浓度酸碱废水,应优先考虑回收利用的废水处理法,根据水质、水量和不同工艺要求,进行厂区或地区性调度,尽量重复使用:如重复使用有困难,或浓度偏低,水量较大,可采用浓缩的废水处理法回收酸碱。
2、低浓度的酸碱废水,如酸洗槽的清洗水,碱洗槽的漂洗水,应进行中和废水处理。
对于中和处理,应首先考虑以废治废的废水处理原则。如酸、碱废水相互中和或利用废碱(渣)中和酸性废水,利用废酸中和碱性废水。在没有这些条件时,可采用中和剂废水处理。
英文版:
Acid-alkali wastewater has strong corrosiveness. If it is discharged directly without treatment, it will corrode pipes and canals and structures, and discharged into the water body. It will change the pH value of the water body, interfere with the growth of aquatic organisms and fishery production. When discharged into the farmland, it will change the soil properties, make the soil acidified or saline-alkalized, and endanger crops. Therefore, the acid-alkali wastewater should be recycled as far as possible, or after treatment, so that the pH value of the wastewater is between 6-9, can be discharged into the water. So what should we pay attention to when dealing with acid and alkali waste water? Let's have a look together.
1. High concentration of acid-base wastewater, should give priority to the recycling of wastewater treatment method, according to water quality, water volume and different process requirements, the plant or regional dispatch, as far as possible reuse: if reuse is difficult, or the concentration is low, water volume is large, can be concentrated wastewater treatment method to recover acid-base.
2. Low concentration of acid and alkali wastewater, such as pickling tank cleaning water, alkali washing tank rinsing water, should be neutralized wastewater treatment.
For neutralization treatment, the waste disposal principle should be considered first. For example, acid and alkali wastewater neutralize each other or use waste alkali (residue) to neutralize acid wastewater, use waste acid to neutralize alkaline wastewater. Without these conditions, neutralizer wastewater can be used.
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该资讯的关键词为:医疗废水处理  酸碱废水处理