| 摘要 |
Fluoride removal, COD and BOD treatment, oxidation and removal of inorganic metals, suspended solid removal, turbidity clearance, bacteria including legtonella eradication, bad odour elimination and scale inhibition on pipes and tank walls, from industrial effluent and aqueous media by reacting, them directly with alunimiiun. ions (Al<SUP>3 ?</SUP>), generated from aluminium anode to produce insoluble aluminium fluoride. Aluminium ions(Al<SUP>3+</SUP>) are oxidised to aluminium dioxide (AI<SUB>2</SUB>O<SUB>3</SUB>) and hydroxide (Al(OH) <SUB>3</SUB> by the oxidation power of free radicals and the oxidants produced from mixed oxides coated titanium anodes. Fluoride ions absorbed on the aluminium hydroxide matrix, free radicals and oxidants eradicating bacteria. Free radicals and oxidants along with aluminium hydroxide reduce COD and BOD substantially eliminating obnoxious odour, creating electro-coagulation and electro-inocculation. this in turn clearing turbidity and settling down suspended solids. Hard scale formation is inhibited very effectively on the walls of the pipes and tanks due to the electromagnetic field created by mixed oxides coated titanium cell and the formation of soft scale that will not adhere to the walls of the pipes and tanks resulting in the reduction of scale forming ions in the aqueous media.
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