Korea Institute of Science and Technology

Seok Won Hong

Jae Woo Choi

Sang Hyup Lee

Yong Su Choi

Sanghyup Lee

Jae Shik Chung

Eunhoo Jeong

Jae Hun Kim

Youngjae Kim

Hyung Joo Kim

Seong Pil Jeong

Yun Jung Kim

Seunghak Lee

Kyung Guen Song

Boyoung Jeong

Yunchul Chung

Yong Bae Park

Kyungjin Cho

Kang Woo Cho

Hien Thi Nguyen

Subeen Park

Jee Hye Byun

Eun-Ju Kim

Yun Chul Chung

Gyo Bum Kim

Seung Gun Chung

Chang Ho Choi

Young Gyun Choi

Bong Geun Jeong

Tai Hak Chung

Jiyun Han

The present disclosure relates to an apparatus for detecting microplastics based on optical technology, more particularly the present disclosure relates to an apparatus for detecting microplastics, which is capable of detecting and analyzing microplastics of various sizes that exist in a fluid in real time regardless of transparency using a microfluidic chip based on optical technology.

Apparatus for detecting microplastics based on differential interference contrast microscope system

The present disclosure relates to a conjugated polyelectrolyte-grafted membrane, which is obtained by fixing a conjugated polyelectrolyte (CPE) capable of generating active oxygen under visible light irradiation to a membrane through crosslinking, and can remove contaminants in water, while reducing bio-fouling on the surface of the membrane, by generating active oxygen through a photocatalytic reaction of the conjugated polyelectrolyte (CPE), as well as to a method for manufacturing the same. The method for manufacturing a conjugated polyelectrolyte-grafted membrane includes the steps of: preparing a conjugated polyelectrolyte (CPE); coating a conjugated polyelectrolyte (CPE) on the surface of a membrane; and carrying out crosslinking of the conjugated polyelectrolyte (CPE) with the surface of the membrane.

Conjugated polyelectrolyte-grafted membrane and method for manufacturing the same

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.

Aquifer storage and recovery system using natural coagulant

The apparatus for water treatment using in-situ activation of a manganese dioxide catalyst includes: a reaction bath configured to give a space where aqueous organic contaminants are removed by means of reaction with permanganate (MnO) generated by electrochemical oxidation of manganese oxide (MnO); a plurality of manganese dioxide catalysts provided at the reaction bath and electrochemically oxidized into permanganate (MnO) by a voltage applied thereto; and a power supply device configured to apply power to the manganese dioxide catalyst so that the manganese dioxide (MnO) is electrochemically oxidized into permanganate (MnO).

Apparatus and method for water treatment using in-situ activation of manganese dioxide catalyst

A composite medium and method thereof for simultaneous removal of cationic and anionic heavy metals are provided to remove cationic and anionic heavy metals effectively. The method includes dissolving sodium alginate powder into deionized water to provide an alginate solution, and introducing amine group-supported mesoporous iron oxide and synthetic zeolite into the alginate solution and kneading the resultant mixture. The method also includes adding the alginate solution mixed with the mesoporous iron oxide and synthetic zeolite dropwise to an aqueous calcium chloride solution so that each drop of alginate solution is cured to form a bead-like composite medium, and vacuum drying the bead-like composite medium to remove water present in the composite medium, while the mesoporous iron oxide and synthetic zeolite are moved from the inside of the composite medium toward the surface of the composite medium.

Composite medium for simultaneous removal of cationic and anionic heavy metals and method for manufacturing the same

The present disclosure relates to a floating type adsorbent for removal of phosphate that can effectively remove phosphate from aqueous phase through reaction between an amine function attached on the surface of a sponge and phosphate. This adsorbent can be regenerated by desorbing the adsorbed phosphate, a method for fabricating same and a method for regeneration the floating type adsorbent for removal of phosphate. The floating type adsorbent for removal of phosphate according to the present disclosure is fabricated by immersing a sponge in a mixture solution of an amine precursor and anhydrous toluene to form an amine function on the surface of the sponge. The amine precursor may be 3-aminopropyltriethoxysilane (APTES) and the APTES and the anhydrous toluene may be mixed at a volume ratio of 0.5-1:1.

Floating type adsorbent for removal of phosphate in aqueous solution and method for fabricating the same and method for regeneration of the same

Disclosed are apparatus and method for alternative aeration-effluent wastewater treatment using a ceramic membrane, which allows the biological treatment to be performed sufficiently in an intermittent aeration tank by combining an anaerobic tank with a plurality of intermittent aeration tanks and selectively changing an inflow path of influent water according to an operation status of the intermittent aeration tanks. The present disclosure is directed to providing an apparatus and method for alternative aeration-effluent wastewater treatment, which allows the aeration and treated water to continuously discharge through two intermittent aeration tanks by independently forming an air injection line and a treated water discharge line at a ceramic membrane provided in each intermittent aeration tank.

Apparatus and method for alternative aeration-effluent wastewater treatment using ceramic membrane

An apparatus for a continuous, automated quantitation of tin compounds in liquid samples and a method for quantitative analysis based on the said apparatus are provided herein. The inventive apparatus acidifies liquid samples and in case organotin compounds are present in the sample, a selective UV irradiation converts the organotin compounds into inorganic tin. The inventive apparatus quantitates this inorganic tin by means of electrochemical methods. The apparatus and method of the present invention allow quantitative analyses of trace amounts of organic and inorganic tin compounds present in liquid samples by converting organotin, a form unsuited for measurement, into inorganic tin, a form amenable to measurements and performing electrochemical analysis. Above all, the present invention affords the construction of an automated, continuous analysis system, making unnecessary additional manual operations and reducing labor costs. The present invention also provides an apparatus for converting organotin compounds into inorganic tin.

Apparatus for analyzing tin compounds in liquid samples and method for analyzing tin levels using the same

A method and an apparatus for wastewater treatment using a nitrogen/phosphorus removal process combined with a floatation separation of sludge that is replaced by the gravity settling secondary clarifier are provided for effectively removing organic substances, nitrogen, phosphorus, granular substances and the like from wastewater. Al or Fe electrode plate is used for generating the micro bubbles so that phosphorus is removed by Al or Fe ions dissolved from the anode. With the method and the apparatus, a concentration of the microorganisms in the bioreactor is maintained high so that the volume and area of the reactor are reduced, that removal efficiency for organic substances, nitrogen, phosphorus is increased, that deterioration of settlability due to sludge bulking or micro floc and deterioration of out-flowing water quality are prevented, that the time required for settling is reduced to increase the processing quantity of wastewater, and that removal efficiency for phosphorus is maximized by simultaneous performances of biological phosphorus removal and chemical phosphorus removal by chemical agglomeration in the solid-liquid floatation separation vessel.

Apparatus for wastewater treatment using nitrogen/phosphorus removal and floatation separation

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Seoul, South Korea

Seok Won Hong