Patent KR-20030022178-A (KR)
Title: Treatment method of organic wastes
Inventor: SEO YEONG JIN
IPC: C02F3/00
Filed: 2003-01-21
Abstract: PURPOSE: A treatment method of organic wastes is provided to economically and stably treat organic wastes such as garbage, byproducts of livestock slaughtering facility, agro-fishery byproducts, human excrements, livestock excretions and byproducts of food processing plant. CONSTITUTION: The treatment method of organic wastes comprises the steps of flowing wastewater and leachate prepared by dehydrating the pretreated organic wastes after pretreating organic wastes into a water catchment tank; supplying the biologically treated organic contaminants to first aeration tank as reducing generation of stench by aerating a mixture of the wastewater, leachate and a mixed powder of excessive sludge, phyllite and humus discharged from the second biological treatment process using air supplied from a blower; continuously biologically treating the organic wastewater by humification reaction in the first aeration tank; supplying the biologically treated organic wastewater to a coagulation reaction tank so that solid materials are coagulated by adding magnetite powder and agitating the mixture; supplying the solid material coagulated organic wastewater to a coagulation tank and forming floc in first precipitation tank by slowly agitating the wastewater; supplying the wastewater to the first precipitation tank so that solid materials are precipitated; supplying magnetite separated sludge to thickening and dehydration process and sending the wastewater in the first precipitation tank to first treatment tank(14); sending first raw water flown into the first treatment tank(14) to second aeration tank(16) to transform organic contaminants dissolved in water into humic (precursor) substance; sending the wastewater to second precipitation tank(17) so that precipitated sludge is returned to the first treatment tank(14) and second aeration tank(16) by second precipitation tank sludge return pump(19), and sending a part of the sludge to a culture tank(28) so that the cultured humification microorganisms are sent to the second aeration tank(16); sending the wastewater of the second precipitation tank(17) to an oxidation tank(20) to decompose organic contaminants so that the wastewater passes through an oxidation column(23) filled with oxidation catalyst(24) before being released to the outside through a final treatment tank(25); supplying a part of oxidized water of the oxidation tank(20) to the first treatment tank(14) and culture tank(28) to adjust oxidation reduction potential values; sending cake discharged from the dehydration treatment process to a flash mixer of the composting process so that the cake is agitated and mixed with other additives before being sent to the fermentation process; sending the final product to the product packing process so that the product is shipped by removing foreign materials from the organic compost using a foreign material sorter after preparing organic compost by aging the mixture with stable humic substance; and turning leachate discharged from the fermentation process to control temperature and moisture of a high temperature fermentation part of the fermentation process, and sending the excessive leachate to the water catchment tank of the wastewater treatment process.