Water treatment process with ozone
AssigneeFuji Electric Co., Ltd.
InventorsTakeo Moniwa, Mitsumasa Okada, Nobuyuki Motoyama, Takayuki Morioka, Yasuji Shimizu, Ryutaro Takahashi
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Abstract
A process for the treatment of water with ozone in which trace amounts of organic substances contained in water to be treated are oxidized and decomposed by diffusing ozone into the water introduced into a reaction tank, by injecting a chelate compound into the water to be treated after or just before the introduction of the water into the reaction tank. Preferred chelate compounds include ethylenediaminetetraacetic acid disodium salt, ethylenediaminetetraacetic acid calcium salt, ethylenediaminetetraacetic acid magnesium salt, ethylenediaminetetraacetic acid iron salt and iron citrate.
Claims18
A process for treating water with hydroxy radicals comprising introducing water containing trace amounts of organic substances into a reaction tank, injecting said water with a chelate compound before or after said water is introduced into said reaction tank, and diffusing ozone into the water introduced into said reaction tank, said chelate compound being injected in an amount effective to accelerate formation of hydroxy radicals from decomposition of said ozone so as to oxidize and decompose said trace amounts of organic substances.
Dependencies are inferred from the claim text.