The Secco polyacrylamide products come in a wide range of models and can handle various industrial wastewater. Today, the Secco editor will explain to you: How to choose a flocculant when dealing with car washing wastewater?

With the continuous improvement of people's living standards, cars have become an indispensable means of transportation for people's travel. The number of families with cars is also increasing. This has also promoted the development of the car washing industry. However, car washing wastewater has the characteristics of high turbidity, large amount of silt and the presence of surfactants. The treatment is very difficult. Generally, the coagulation process is used as the pretreatment unit for car washing wastewater treatment, which is the best solution. In this pre-treatment process, coagulants and polyacrylamide flocculant products are used. The most commonly used coagulants are aluminum sulfate flocculant, polyaluminum chloride (PAC), polyferric sulfate(PFS)， and polyaluminum chloride iron (PAFC)， etc.

In order to achieve the best coagulation effect， it is crucial to select the appropriate coagulant based on different water qualities. For the treatment of car washing wastewater， we have conducted experiments on the optimal dosage of such wastewater. When using polyaluminum chloride + polyacrylamide in combination， the effluent quality is better. From the cost analysis perspective， the cost is lower when using aluminum sulfate + polyacrylamide.

If you have any questions during the process of treating wastewater with polyacrylamide， you can consult the experienced technicians at any time. We will be dedicated to serving you.