| No. | Date | Production/ Construction Name | Place of order |
|---|---|---|---|
| 28 | 2021.07 | Hyocheon Sewage Treatment Plant Fine Wood Screen Liftchain and Spracket Replacement Construction | Environmental corporation of Gwangju |
| 27 | 2021.06 | nstallation of supplementary facilities for installation of TMS and environment of sewage sludge chimneys | Environmental corporation of Gwangju |
| 26 | 2021.05 | Repair work on micro circulation pumps for total management facilities of the first sewage treatment plant | Environmental corporation of Gwangju |
| 25 | 2021.03 | Door support bar fabrication | Hanbit No.3 power plant |
| 24 | 2021.01 | Purchase of first sewage treatment plant precipitation battery sludge collector decelerator parts | Environmental corporation of Gwangju |
| 23 | 2020.10 | Repair of inert matter crusher of sewage treatment plant | Environmental corporation of Gwangju |
| 22 | 2020.09 | Production & installation of inert matter fresh dehydrator chute | Environmental corporation of Gwangju |
| 21 | 2020.07 | Improvement in air-blow operation of bioreactor in order for the preparation of heat wave | Environmental corporation of Gwangju |
| 20 | 2020.06 | Repair of microsand hydrocyclone discharge pipe of T-P treatment facility | Environmental corporation of Gwangju |
| 19 | 2020.05 | Production & installation of dump truck cover | Environmental corporation of Gwangju |
