Patent ID: 7396458

Claim:
A wastewater treatment equipment comprising: a first tank storing a wastewater containing a material comprising fluorine; a neutralizing device adding sodium hydroxide or potassium hydroxide to the first tank so as to neutralize the wastewater; a second tank storing the neutralized wastewater; a forming device adding a calcium compound to the second tank so as to form calcium fluoride; a third tank storing the wastewater containing the calcium fluoride; a separating device separating the calcium fluoride from the wastewater stored in the third tank, wherein the separating device comprises a filtration equipment and a self-assembled membrane comprising calcium fluoride formed on a surface of the filtration equipment, and the filtration equipment is configured so that the self-assembled membrane comprising calcium fluoride is peeled off a dewatering device for dewatering the peeled off calcium fluoride; and a path for transporting the dewatered calcium fluoride to the second tank.