Aquifer storage and recovery system using natural coagulant

Patent metadata

Field	Value
Publication number	US-11142472-B2
Application number	US-201916677679-A
Country	US
Kind code	B2
Filing date	Nov 8, 2019
Priority date	Apr 11, 2019
Publication date	Oct 12, 2021
Grant date	Oct 12, 2021

Abstract

The present invention is an aquifer storage and recovery system using a natural coagulant, in which in purifying raw water through aquifer storage and recovery, assimilable organic carbon (AOC) included in the raw water is effectively removed using a natural coagulant produced in the aquifer storage and recovery process, thereby reducing the time required to purify raw water by aquifer storage and recovery.

First claim

What is claimed is:

1. An aquifer storage and recovery system using a natural coagulant, comprising:
a coagulation reactor which mixes and agitates a natural coagulant and raw water to induce formation of flocs, and deposits the flocs to remove assimilable organic carbon (AOC) and organic matter included in the raw water;
an aquifer storage and recovery tank which comprises a permeable layer and an underground aquifer, is supplied with supernatant of the coagulation reactor and stores reclaimed water through an aquifer storage and recovery process; and
a coagulant condenser and separator which separates the reclaimed water of the underground aquifer into treated water and the natural coagulant,
wherein a fine metal particle present in the permeable layer is dissolved in the supernatant in a form of a metal ion while the supernatant of the coagulation reactor passes through the permeable layer of the aquifer storage and recovery tank, and
the metal ion included in the reclaimed water is separated as the natural coagulant by the coagulant condenser and separator, and the natural coagulant separated by the coagulant condenser and separator is fed into the coagulation reactor.

2. The aquifer storage and recovery system using a natural coagulant according to claim 1 , wherein the natural coagulant separated by the coagulant condenser and separator is in a form of solid-phase metal hydride or in a condensed form containing dissolved metal ion.

3. The aquifer storage and recovery system using a natural coagulant according to claim 1 , wherein the metal ion that constitutes the natural coagulant is any one of an iron ion, an aluminum ion, a copper ion, a manganese ion and a cobalt ion or their mixtures.

Assignees

• Korea Inst Sci & Tech

Inventors

• Jeong Seong Pil
• Cho Kyungjin
• Choi Jae Woo
• Hong Seok Won
• Lee Seunghak
• Kim Eun-Ju
• Chung Jae Shik
• Nguyen Hien Thi
• Kim Youngjae

Classifications

• E03B3/34 Primary

  of underground water · CPC title

• C02F1/5236 Primary

  using inorganic agents · CPC title

• C02F1/5245

  using basic salts, e.g. of aluminium and iron · CPC title

• C02F1/442

  by nanofiltration · CPC title

• C02F1/001

  Processes for the treatment of water whereby the filtration technique is of importance (C02F1/44 takes precedence; construction of filters in general B01D24/00 - B01D41/00) · CPC title