Pre-degreasing → main degreasing → washing 1 → washing 2 → washing 3 → silane → washing → washing → blow-dry → inspection. Among them, poh-22e phosphorous free degreaser is used as degreaser, mainly composed of various surfactants, corrosion inhibitors and inorganic salts. Silane is a silane coupling agent. Generally, these tank fluids do not drain out, only need to be added, and generally the tank fluid does not drain out. Discharge of waste water for cleaning. The wastewater mainly includes pre-degreasing wastewater, degreasing wastewater and silane process wastewater. The pollutants in the wastewater are mainly PH, grease, CODcr and a small amount of metal ions such as fluoride, zirconium and manganese. Wastewater usually needs to be neutralized, coagulated and precipitated to remove most harmful substances.

The key projects of wastewater treatment are mainly petroleum, CODcr index, because the degreaser is mainly emulsified oil.