Chlorine Dioxide

R&D company with unique environmental purification technology

Water Treatment

Chlorine/chlorine dioxide wastewater treatment comparison

Low price competitiveness compared to chlorine, but wide pH 2 ~ 10 available / Excellent decomposition of pollutant

Chungju, Gwacheon Sewage Treatment Plant Currently implementing discharge treatment using chlorine dioxide [Many developed countries]

Eco-friendly disinfectant with strong disinfection and deodorizing power

items Cl2 NEOCL-ClO2
Residence time better than chlorine dioxide weak residence effect
5 times slower decomposition than CLO2 5 times faster decomposition than chlorine
residual chlorine chlorine remains no rsidue
BOD/COD case by case lowering efffect
effect(pH) weak effect at higher pH effective at wide range pH(2~12)
DBP: THMs / HASs / chloroform

forms chloramne

generates carcinogenic disinfection by-products such as THM

forms no carcinogenic DBP
efficacy no protozoa removal Various viruses, protozoa (euglena, amoeba, etc.) can be completely removed
Protozoa removal bacteria regeneration Excellent removal of E. coli, phenol, sulfide, thioalcohol, cyanides
heavy metal removal low compared to chlorine dioxide Iron and manganese can be removed by strong oxidizing power)
deodorization none strong deodorant

domestic article [water works etc.]

[ Hankyoreh Newspaper (Naver News Library / Screen Capture) ]

For the removal of trihalomethane produced after chlorine disinfection in 1991, the information is strongly recommended to combine chlorine disinfection and chlorine dioxide treatment as part of the advanced water treatment.
(Seoul-25 Water Purification Plants including Yeongdeungpo, Noryangjin, Seonyyu)

Produced exclusive supply of “D” water purification plant in 1991

After the phenolic crisis of the Nakdong River in Gumi, Daegu, “D” ClO2 product input / no effect due to the quality of used ClO2 product, supply of ClO2 product to the above water purification plant was stopped.

“D” ClO2 2% Product :

25% of sodium chlorite salt produced by electrolysis of hydrochloric acid, salt concentration 3.5% / sodium chlorite concentration 800ppm.
No food additive certification, no eco-friendly certification, no phenol, manganese removal test report

NEOCL-ClO2 0.2% product :

Pure ClO2 0.2% high concentration and long-term storage
[Eco-Friendly Label Certification, FDA Certification, Food Additives Certification, Various Test Reports and Certifications, Removal of Toxic Heavy Metals, Phenol, Manganese, Iron, Phosphorus, etc.]

industrial sewage treatment plant wastewater treatment result

odor method of evaluation 0.1% 0.25% 0.5% 0.8% 1% 2% 3% 4% 5% 6% 7% 8%
odor: hydrogen sulfide,methyl mercaptane (18.09.29) olfactory 2ppm 5ppm 10ppm 16ppm 20ppm 40ppm 60ppm 80ppm 100ppm 120ppm 140ppm 160ppm
same as before weak middle removal no odor( ClO2 smell)

Food wastewater (odor and turbidity) treatment results

treatment of food waste water

using chlorine dioxide, food wastewater test

100% Sludge and odor removal

according to odor complaints, the priority budget will be secured and the product supply will be discussed.

[ Food wastewater (odor and turbidity) treatment results ]

removal of algae

Comparison of Reduction Efficiency % by Technology

[ Comparison of Reduction Efficiency % by Technology (highest, average, lowest) ]

Total reduction in total chlorophyll-a concentration by technology over 3 months

Using chlorine dioxide, food wastewater (Chungnam environment) and Daejeon Facility Management Corporation test

100% Sludge and odor removal

according to odor complaints, the priority budget will be secured and the product supply will be discussed.

ClO₂Algae Removal Principle and Efficiency

  • ClO₂Algae Removal Principle

    CLoss of chlorophyll stability and membrane lipid and protein degeneration by chlorine dioxide

    Chloroplast destruction and discoloration by chlorophyll Mg (magnesium) oxidation by chlorine dioxide

    Removal principle

    1Chlorine dioxide has the ability to quickly oxidize metals such as Mg and Mn, Oxidizes and destroys Mg of chlorophyll

    2Chlorine dioxide oxidize -OH (hydroxyl) -SH (sulfahydryl) chemical functional group Oxidation to C = 0, S = 0 and so on.
    Oxidizes -OH and -SH of chlorophyll and chloroplast membranes, resulting in membrane damage, Amino acids are modified impossible to make proteins -destruction of algae

  • ClO₂Algae Removal Efficiency

    Missari Algae-4 days treatment 97% removal (15ppm)

    (ref ; Research on the removal of algae from the Misari rowing lake)
    (Korean Journal of Limnology Vol.22(4), 309-319(1989))

    Algae removal, such as chlorella-30 minutes treatment 99.0% removal (6ppm)

    (ref ; Junli, H)

    Geosmin generating algae removal-99.9% removal in 1 minute (1 ppm)

    (ref. : Whitmore TN. J. Appl. Bacterial 72(2), 160-5(1992))

    excellent ability of algae removal

    (ref. : Zhang.H외 Ying Yong Sheng Tai Xue Bao 14(7), 1173-6(2003))

Algae removal using NEOCL-ClO2

Technology that kills and removes algae rapidly by continuously generating an appropriate concentration of chlorine dioxide in frequent algae generation areas

Technology that can remove algae quickly and efficiently by utilizing the characteristic of chlorine dioxide which has an excellent in chlorophyll destruction effect of algae

Technology to prevent algae generation in advance through the continuous generation of chlorine dioxide

Unlike other pesticides, it has eco-friendly, non-toxic toxicity that does not produce disinfection by-products such as THMs.

Algae removal case-fast flow Cheonggyecheon algae removal test

After removing severe algae with initial chlorine dioxide, measure the ability to maintain a constant efficacy-periodic management to prevent algal algae

  • before ClO2 treatmet

  • after ClO2 treatmet

ClO2 generation for 4 hours a week using ClO2 generator

Due to the rapid flow of Cheonggyecheon stream, despite the short contact time between algae and ClO2, we confirmed that the algae on the bottom were significantly removed.

In the case of Cheonggyecheon, not only algae but also Escherichia coli were one of the most harmful problems, and E. coli was killed 100% after ClO2 treatment

strain before ClO2 treatme after ClO2 treatme
pathogenic E.Coli(/mL) 300 0
total E.Coli(/100mL) 6,600 0

Algae Elimination Case-Konjiam CC and Arrizi CC Algae Elimination Test

  • Algae Elimination Case-Konjiam CC

    As a result of removing algae using ClO2, algae were significantly reduced.

    - Visual observation of the rock part

    Location: Konjiam CC M5 hazard

    Date and time: July 19, 2010

  • Arrizi CC Algae Elimination Test

    After treatment with 1 ppm of chlorine dioxide, all chlorophyll-a is removed in water within 4 to 5 hours after exposure to chlorine dioxide.

    In addition, as a result of treatment with 1 ppm of chlorine dioxide, there is remarkable effect on green algae not only in green algae ,but also significant efficacy for algae caused by sticking to stones ,as shown in the picture below.
    (All chlorophyll-a is killed as a result of 24 hours chlorine dioxide treatment)

Konjiam CC Fish Toxicity Test Case

Intensive observation of fish after 4 test of chlorine dioxide :1st (low concentration / 10L), 2nd (high concentration / 10L), 3rd (high concentration / 10L), 4th (large concentration / 10L)

Even if the concentrated ClO2 aqueous solution was dispersed in an isolated lake, it was confirmed that there were enough livestocks , even though it was ClO2 aqueous solution.

Disinfection effect is shown even if high concentration is dropped due to its easy decomposition characteristics, and it is confirmed that no residue is generated (below 1 ppm), as it is completely decomposed within 4 to 5 minutes.

Report on fish toxicity in the Korea Environment Management Corporation Bird Reduction Pilot Project

  • Ecotoxicity test results using daphnia
    Proven to be nontoxic!

    *Evidence: water flea, luminous bacteria ecotoxicity test