导致煤化工废水处理设备中产生泡沫的原因有很多，其中由于煤化工废水中含有大量脂肪烃类和带有羟基的杂环类，或者许多表面活化剂等化学成分，是导致处理设备中产生泡沫的主要原因。要想减少泡沫的产生，就应该在废水处理的预处理段尽可能多地去除这些物质。如果采用常规的处理方法，比如运用常规的隔油池和空气气浮这种处理工艺，又会让空气中的氧融入水中，使得废水中的色度变得更深，并且出现多元酚的氧化反应，转化成了难以生化降解的苯醌类中间产物，在后续的生物工艺处理中增加了很大的难度。
There are many reasons that lead to bubbles in coal chemical wastewater treatment equipment. Coal chemical wastewater contains a large number of aliphatic hydrocarbons and hydroxyl heterocyclic compounds, or many surface active agents and other chemical components, which is the main reason for foaming in treatment equipment. In order to reduce foam production, we should remove as many substances as possible in the pretreatment section of waste water treatment. If conventional treatment methods, such as conventional oil separator and air flotation, are used, the oxygen in the air will be mixed into the water, making the color of the wastewater deeper, and the oxidation reaction of polyphenols will occur, which will turn into benzoquinone intermediate products that are difficult to be biodegraded, which will increase the difficulty in the subsequent biological process treatment.
目前，已经研制出一种惰性的气体，在去除煤化工废水中的油脂成分能起到很好的效果，还能防止在废水处理过程中发生预氧化的问题，这能为后期泡沫的处理减少很多的麻烦。
At present, an inert gas has been developed. It can achieve good results in removing grease from coal chemical wastewater, and can prevent the problem of pre oxidation in the process of wastewater treatment. This can reduce much trouble for later foam treatment.