3. Put the lower wastewater into a static pool, add polyaluminum chloride for flocculation, treat the upper clean water according to the conventional method of lightly polluted industrial wastewater, and hand over the lower sediment to a special person for treatment or burial.
After such treatment, you need to send less waste water to others for treatment, which can save costs in a strict city.
Total synthesis: after filtration; The rest is directly dried and sold to the factory that makes cutting fluid. They have a way to deal with them.
Buy cutting fluid, and go to Scaran industrial lubricants Mall.