活性炭吸附工艺在污水厂的应用
发布时间:
2022-10-31 10:16
在化工厂或化工园区污水末端深度处理或改造方面，活性炭吸附工艺因为反应机理简单、运维便捷，是很多企业会考虑的方案之一。
一般来说，化工园区的污水厂经过几级生化之后仍有难以去除的COD，常见的浓度范围是COD 150mg/L~60mg/L，现在需要处理到一级A, COD 50mg/L的比较多, 有的则更高，要求处理到地表Ⅳ类水, 即要求COD 浓度达到30mg/L。如果COD去除目标在20mg/L左右, 比如从COD70mg/L去除到50mg/L、或COD50mg/L去除到30mg/L等，或者目前系统运行介于达标或不达标之间，以上情况选择活性炭吸附工艺比较合适，不但效果可靠，吨水处理成本也适当，而且，更重要的是，运维简单，对运营人员要求不高，还有的污水提标对色度、嗅味有要求的，选活性炭就更有不可比拟的优势了。
如果要去除的COD目标超过20mg/L，比如从COD120mg/L降低到60mg/L，单独用活性炭吸附的话，要么炭吸附饱和比较快，要么炭投加量比较大，每吨水运行成本通常会偏高，可以前端先采用别的工艺，末端再用活性炭吸附工艺，这种处理效果就比较理想。
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