dun yang

rare earth recomag remagdisc effluent coagulation influent primary treatment eco-friendly current tertiary treatment scimee sewage sedimentation wwtp water pollution magnet green wastewater treatment water ecology solid and liquid separator water treatment clarifier wastewater reuse green technology rare-earth magcarrier microparticle sewage treatment permanent magnet underground coal mining cutting-edge inland water body eutrophication wastewater circulation water hot rolling mill iron and steel industry water recycle environmental protection