Daeyun Environment Co., Ltd.

Established Daeyun Environment Co., Ltd.

Manure treatment (septic tank) design, construction business license acquisition (Seoul City No. 32)

Acquired license for water and sewage facilities construction business (No. 92-Seoul-13-110)

Acquired design and construction license for sewage facilities (Seoul Regional Office No. 191)

Registered as a qualified company to conduct military delivery security measurements (Number: 2397439-Commander of the 829th Korean Armed Forces)

Acquired ISO 9002 certification (KQC-0580))

Acquired license for water quality prevention facility business - No. 565, Han River Environment Management Commissioner

- Patent application
Submerged membrane separation activity sludge method (utility model: 1405) (trademark application: No. 19208)

Joint research on dye wastewater color treatment using chitin: Department of Environmental Health, Yongin University

Water purification using membrane (liver waterworks, heavy water facilities) - Joint research: Department of Environmental Health, Yongin University

Commenced trade business of environmental equipment and environmental water treatment technology Established the Ministry of Trade (Association No. 30007280)

Development of advanced treatment using membrane (nitrogen, phosphorus removal: using ultrasound) - Joint research: Department of Environmental Health, Yongin University

Development of a single purification system for high-concentration living wastewater – Joint research: Department of Environmental Engineering, Seoul National University

- Patent acquisition
Patent for nitrogen removal device using ultrasonic membrane in wastewater treatment system and method thereof (Commissioner of the Korean Intellectual Property Office No. 0504008)

Acquired management business license for sewage treatment facilities (No. 2006-1)

Acquired license for metal structure window construction business (Gangnam-06-08-13)

Established Vietnam subsidiary (DAEYUN VINA CO., LTD)

Established Daeyun Environment Co., Ltd. affiliated research institute

Awarded Excellent Partner Commendation - Doosan Construction Co., Ltd.

Awarded commendation for construction work of Weonneung Sewerage Construction Project - Goyang City (No. 2008-1019 Goyang Mayor)

Certificate of Recognition as Innovative SME (INNO-BIZ) – No. 8014-1787 (Director of the Seoul Regional SMEs and Startups Office)

Acquired certificate of completion of report for overseas construction project
Water and sewage facilities construction project (No. 168)

Acquired license for machinery and equipment construction business (Gangdong-11-10-02)

Acquired certificate of completion of report for overseas construction project
- Metal structure window construction project (No. 171)
- Mechanical equipment construction project (No. 504)
- Environmental pollution prevention facility project (No. 115)

Awarded Excellent Partner Commendation - Doosan Construction Co., Ltd.

Established subsidiary in the Philippines (DAE YUN CONSTRUCTION CORP)

- Patent acquisition
Integral filtration and sterilization system and filtration and sterilization method using the system (Commissioner of the Korean Intellectual Property Office No. 10-1407956)

Acquired license for designation of a water quality management agency (Seoul No. 31)

- Patent acquisition
Redox catalyst for ultra-high treatment of wastewater containing nickel, silicon, magnesium, titanium, iron, aluminum alloy nanoparticles, and ultra-high treatment system for wastewater using such (Commissioner of the Korean Intellectual Property Office No. 10-2014-0089031)

Relocated head office of Daeyun Environment Co., Ltd.

Factory registration (385-6, Eumhyeon-ri, Naechon-myeon, Pocheon-si, Gyeonggi-do, and 4 land lots)))

- Patent acquisition
Advanced wastewater treatment system and sequencing batch activated sludge method using bi-directional agitation type circulator and method thereof (Commissioner of the Korean Intellectual Property Office No. 10-1928327)

- Patent acquisition
Shatterproof curtain for hopper (Commissioner of the Korean Intellectual Property Office No. 10-1976990)

- Contract amounts announced by Korea Professional Construction Association, Korea Mechanical Construction Association (unit: KRW 1,000)
Water and sewage facilities (17,454,865),
Mechanical equipment construction project (8,000,872),
Metal window greenhouses (3,269,752),
Steel structures (3,869,752)

Established DAE YUN CONSTRUCCIONES MEXICO DA DE CV

Achievement Award - Korea Professional Construction Association