Pickling wastewater is the wastewater produced when sulfuric acid, nitric acid, hydrochloric acid, hydrofluoric acid and phosphoric acid are used for pickling to remove metal surface oxides. It generally comes from industries such as spraying, electroplating, steel, machinery manufacturing, and metal products. This acid-containing wastewater is highly corrosive and cannot be discharged directly without treatment. These pickling wastewaters also contain heavy metal ions, and the harm to humans is self-evident. Therefore, pickling wastewater should be recycled as much as possible or treated to neutralize the pH value before discharge.
Method for Pretreatment of Pickling Liquid Wastewater
Pretreatment of pickling wastewater, pickling wastewater contains a lot of heavy metal ions, so heavy metal ions should be properly treated. The main pickling treatment processes include neutralization method, iron sulfate method, organic solution extraction method, etc.
Zhengzhou Tiei Extraction has provided pretreatment solutions for pickling liquid wastewater for many companies. It adopts solvent extraction method and uses CWL-M centrifugal extractor to extract ferric chloride from wastewater with good results.
Pickling Wastewater Treatment Iron Extraction Case
Water quality of the eluent discharged from a certain enterprise: 2.33% hydrochloric acid, 26.63% ferric chloride, and 5.21% aluminum chloride. In order to extract the iron in the wastewater, we used extraction--washing--stripping to treat the wastewater.
The results showed that the ferric chloride content in the treated wastewater dropped below 0.5%, and the extraction rate of ferric chloride reached more than 98%.
Zhengzhou Tiei Extraction's CWL-M centrifugal extractor has a good effect in the pretreatment of pickling liquid wastewater, which can meet the production requirements of customers. It has a large processing capacity, simple operation, high extraction rate, good extraction effect, and low overall operating costs.
If you have similar needs or other types of organic wastewater that need to be treated, welcome contact our Tiei Extraction.
Email: sales@tieiextraction.com
Whatsapp: +86 19069612820
