한국물환경학회지 (Journal of Korean Society on Water Environment)

  • 제36권6호
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  • Pages.535-545
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  • 2020
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  • 2289-0971(pISSN)
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  • 2289-098X(eISSN)
한국물환경학회 (Korean Society on Water Environment)
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공공하수처리시설에서 에너지 사용현황 및 절감방안 연구

A Study on Energy Usage Monitoring and Saving Method in the Sewage Treatment Plant

  • 투고 : 2020.09.15
  • 심사 : 2020.11.25
  • 발행 : 2020.11.30
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초록

This study aims to conserve and monitor energy use in public sewage treatment plants by utilizing data from the SCADA system and by controlling the aeration rate required for maintaining effluent water quality. Power consumption in the sewage treatment process was predicted using the equipment's uptime, efficiency, and inherent power consumption. The predicted energy consumption was calibrated by measured data. Additionally, energy efficiency indicators were proposed based on statistical data for energy use, capacity, and effluent quality. In one case study, a sewage treatment plant operated via the SBR process used ~30% of energy consumed in maintaining the bioreactors and treated water tanks (included decanting pump and cleaning systems). Energy consumption analysis with the K-ECO Tool-kit was conducted for unit processing. The results showed that about 58.7% of total energy consumed was used in the preliminary and biological treatment rotating equipment such as the blower and pump. In addition, the energy consumption rate was higher to the order of 19.2% in the phosphorus removal process, 16.0% during sludge treatment, and 6.1% during disinfection and discharge. In terms of equipment energy usage, feeding and decanting pumps accounted for 40% of total energy consumed following 27% for blowers. By controlling the aeration rate based on the proposed feedback control system, the DO concentration was reduced by 56% compared pre-controls and the aeration amount decreased by 28%. The overall power consumption of the plant was reduced by 6% via aeration control.

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참고문헌

  1. Baird, R. B., Eaton, A. D., and Rice, E. W. (2017). Standard methods for the examination of water and wastewater, 23rd edition, American Public Health Association (APHA), American Water Works Association (AWWA), Water Environment Federation (WEF).
  2. Di Fraia, S., Massarotti, N., and Vanoli, L. (2018). A novel energy assessment of urban wastewater treatment plants, Energy Conversion and Management, 163, 304-313. https://doi.org/10.1016/j.enconman.2018.02.058
  3. Drewnowski, J., Remiszewska-Skwarek, A., Duda, S., and Lagod, G. (2019). Aeration process in bioreactors as the main energy consumer in a wastewater treatment plant. Review of solutions and methods of process optimization, Processes, 7(5), 311. https://doi.org/10.3390/pr7050311
  4. Henriques, J. and Catarino, J. (2016). Sustainable value - an energy efficiency indicator in waste water treatment plants, Journal of Cleaner Production, 142, 323-330. https://doi.org/10.1016/j.jclepro.2016.03.173
  5. Jang, S. B., Lee, H. H., Hong, S. T., and Chun, M. G. (2014). Development of smart remote terminal unit for water treatment SCADA system, Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, 28(2), 24-30. [Korean Literature] https://doi.org/10.5207/JIEIE.2014.28.2.024
  6. Joo, C., Lee, H., Kwak, P ., Hwang, J., and Jeon, H. (2004). A study on the analysis of real data using SCADA system in water distribution network, Proceedings of the 2004 Spring Conference of Korean Society of Environmental Engineers (KSEE), Korean Society of Environmental engineers (KSEE), 753-760. [Korean Literature]
  7. Kim, D. Y. (2020). Diagnosis and evaluation of energy consumption patterns in wastewater treatment plants, Master's Thesis, Korea National University of Transportation, 11-13. [Korean Literature]
  8. Korea Environment Corporation (K-ECO). (2015). A study on the development of technological diagnosis technique through the analysis of energy consumption patterns in sewage treatment plant, Korea Environment Corporation. [Korean Literature]
  9. Korea Environment Corporation (K-ECO). (2017). A study on the improvement of integrated management sewage facility operation management, Korea Environment Corporation. [Korean Literature]
  10. Korean Water and Wastewater Association (KWWA). (2020a). Manual for energy independence of sewage treatment facilities, Korean Water and Wastewater Association. [Korean Literature]
  11. Korean Water and Wastewater Association (KWWA). (2020b). A study on the energy saving and recovery of sewage treatment facilities, Korean Water and Wastewater Association. [Korean Literature]
  12. Longo, S., d'Antoni, B. M., Bongards, M., Chaparro, A., Cronrath, A., Fatone, F., Lema, J. M., Mauricio-Iglesias, M., Soares, A., and Hospido, A. (2016). Monitoring and diagnosis of energy consumption in wastewater treatment plants. A state of the art and proposals for improvement, Applied Energy, 179, 1251-1268. https://doi.org/10.1016/j.apenergy.2016.07.043
  13. Maktabifard, M., Zaborowska, E., and Makinia, J. (2018). Achieving energy neutrality in wastewater treatment plants through energy savings and enhancing renewable energy production, Reviews in Environmental Science and Bio/Technology, 17, 655-689. https://doi.org/10.1007/s11157-018-9478-x
  14. Ministry of Environment (ME). (2010). Basic plan for energy independence, Ministry of Environment. [Korean Literature]
  15. Ministry of Environment (ME). (2011). Water pollution official test method enacted by Korean Ministry of Environment, Ministry of Environment. [Korean Literature]
  16. Ministry of Environment (ME). (2014). Development of IT-based intelligent control and core technology for customized energy-saving devices for the energy saving of the sewage treatment plant blower and pump, Ministry of Environment. [Korean Literature]
  17. Ministry of Environment (ME). (2018). Statistics of sewerage, Ministry of Environment. [Korean Literature]
  18. Ministry of Environment (ME). (2019). A study on the policy of energy self-reliance in public sewage treatment facilities, Ministry of Environment. [Korean Literature]
  19. Ministry of Trade, Industry and Energy (MOTIE). (2018). Regulations for operation of efficiency management equipment and materials, Ministry of Trade, Industry and Energy.
  20. United States Environmental Protection Agency (U. S. EPA). (2010). Evaluation of energy conservation measures for wastewater treatment facilities, United States Environmental Protection Agency.
  21. Xu, J., Li, Y., Wang, W., Wu, J., Wang, X., and Li, F. (2017). Exploring the feasibility of energy self-sufficient wastewater treatment plants: A case study in eastern China, Energy Procedia, 142, 3055-3061. https://doi.org/10.1016/j.egypro.2017.12.444