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Patent Searching and Data


Title:
SEWAGE TREATMENT SYSTEM
Document Type and Number:
WIPO Patent Application WO/2021/137310
Kind Code:
A1
Abstract:
A sewage treatment system, according to the present disclosure, is a sewage treatment system for treating overflow water as much as possible during sewage treatment of a combined sewer, the system comprising: a grit chamber which primarily filters foreign substances in sewage to be treated; at least two radial multi-stage filtration devices in which the sewage to be treated, which has passed through the grit chamber, passes through a radial multi-stage filtration part while moving from the center in the radial direction, thereby being purified; a membrane filtration device for filtering the sewage to be treated, which has passed through the radial multi-stage filtration devices, by using a membrane; and a disinfection chamber for disinfecting the sewage to be treated which has passed through the membrane filtration device. The sewage treatment system of the present disclosure appropriately controls the cleaning speed of the filtration devices according to precipitation or rainfall so as to be able to prevent occurrence of untreated overflow water with respect to 1Q or more of sewage while maintaining a constant quality of treated water. In particular, in case of rain, when treating 3Q of sewage, the treatment efficiency of conventional primary settling chambers sharply decreases, whereas the sewage treatment system of the present disclosure can treat sewage so as to have an ordinary water quality by introducing the radial multi-stage filtration devices.

Inventors:
HONG BONG CHANG (KR)
SHIM IN TAE (KR)
YUN YOUNG SIK (KR)
Application Number:
PCT/KR2019/018734
Publication Date:
July 08, 2021
Filing Date:
December 30, 2019
Export Citation:
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Assignee:
P&I HUMAN KOREA CO LTD (KR)
International Classes:
E03F5/10; B01D35/02; C02F1/50; C02F1/52; C02F3/12; E03F5/14
Foreign References:
KR20150064574A2015-06-11
KR20140042529A2014-04-07
KR20060026681A2006-03-24
KR20160046507A2016-04-29
US20030034286A12003-02-20
Attorney, Agent or Firm:
LEE & PARK (KR)
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