Process for chemically oxidizing wastewater with reduced sludge production
AssigneeIndustrial Technology Research Institute
InventorsYao-Hui Huang, Gaw-Hao Huang, Shan-Shan Chou, Huey-Song You, Shwu-Huey Perng
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Abstract
A process to purify wastewater by chemical oxidation is disclosed. The purification is carried out in a fluidized bed of a suitable particulate carrier upon which the iron(III) compound produced by Fenton's reaction crystallizes or coats, thereby reducing the sludge content of effluent over 50%. In addition, the fluidized bed improves the COD removal by way of thoroughly mixing the wastewater with adding agents.
Claims8
A process for chemically oxidizing wastewater containing TOC (total organic carbon) with reduced sludge production, said process comprising
- injecting water water, hydrogen peroxide and ferrous ions from different conduits into a fluidized bed reactor,
- thoroughly mixing the wastewater with ferrous ions and hydrogen peroxide in the fluidized bed reactor, which is provided with a suitable particulate carrier to cause iron (III) compound produced from said mixing to exclusively crystallize or coat onto said carrier and chemically oxidize said wastewater, and
- removing the treated waste water from said reactor,
- wherein said TOC is removed from said wastewater and sludge production is reduced in the fluidized bed reactor,
- wherein the pH value of the wastewater ranges from about 2 to 5;
- wherein the hydraulic retention time of the wastewater in the fluidized bed reactor is about 10-600 minutes, and
- wherein the surface loading rate of the fluidized bed ranges from about 0.02 to 5 kgFe/m.sup.2 hr.
Dependencies are inferred from the claim text.