Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Integrated Digestion of Thermal Solubilized Sewage Sludge to Improve Anaerobic Digestion Efficiency of Organic Waste

유기성 폐기물의 혐기성 소화효율 향상을 위한 열가용화 하수슬러지의 통합소화

  • Oh, Kyung Su (Department of Environmental Energy Engineering Graduate School of Convergence Science, Seoul National University of Science and Technology) ;
  • Hwang, Jung Ki (Department of Environmental Energy Engineering Graduate School of Convergence Science, Seoul National University of Science and Technology) ;
  • Song, Young Ju (Department of Environmental Energy Engineering Graduate School of Convergence Science, Seoul National University of Science and Technology) ;
  • Kim, Min Ji (Department of Environmental Engineering, Chungbuk National University) ;
  • Park, Jun Gyu (Department of Advanced Energy Engineering, Chosun University) ;
  • Pak, Dae Won (Department of Environmental Energy Engineering Graduate School of Convergence Science, Seoul National University of Science and Technology)
  • 오경수 (서울과학기술대학교 융합과학대학원 에너지 환경공학과) ;
  • 황정기 (서울과학기술대학교 융합과학대학원 에너지 환경공학과) ;
  • 송영주 (서울과학기술대학교 융합과학대학원 에너지 환경공학과) ;
  • 김민지 (충북대학교 환경공학과) ;
  • 박준규 (조선대학교 첨단에너지공학과) ;
  • 박대원 (서울과학기술대학교 융합과학대학원 에너지 환경공학과)
  • Received : 2021.11.18
  • Accepted : 2022.03.18
  • Published : 2022.03.30
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Abstract

Studies for improving the efficiency of the traditional anaerobic digestion process are being actively conducted. To improve anaerobic digestion efficiency, this study tried to derive the optimal pretreatment conditions and mixing conditions by integrating the heat solubilization pretreatment of sewage sludge, livestock manure, and food waste. The soluble chemical oxygen demand (SCOD) increase rate of sewage sludge before and after heat solubilization pretreatment showed an increased rate of 224.7% compared to the control group at 170℃ and 25 min and showed the most stable increase rate. As a result of the biomethane potential test of sewage sludge before and after heat solubilization pretreatment, the total chemical oxygen demand (TCOD) and SCOD removal rates increased as the heat solubilization temperature increased, but did not increase further at temperatures above 170℃. In the case of methane generation, there was no significant change in the cumulative methane generation from 0.134 to 0.203 Sm3-CH4/kg-COD at 170℃ for 15 min. As a result of the integrated digestion of organic waste, the experimental condition in which 25% of the sewage sludge, 50% of the food waste, and 25% of the livestock manure were mixed showed the highest methane production of 0.3015 m3-CH4/kg-COD, confirming that it was the optimal mixing ratio condition. In addition, under experimental conditions mixed with all three substrates, M4 conditions mixed with 25% sewage sludge, 50% food waste, and 25% livestock manure showed the highest methane generation at 0.2692 Sm3-CH4/kg-COD.

Keywords

References

  1. Chandler, J. A., Jewell, W. J., Gossett, J. M., Van Soest, P. J., and Robertson, J. B. (1980). Predicting methane fermentation biodegradability, Biotechnology and Bioengineering Symposium, 10, 93-107.
  2. Dwyer, J, Starrenburg, D, Tait, S, Barr, K, Batstone, D. J., and Lant, P, (2008). Decreasing activated sludge thermal hydrolysis temperature reduces product colour, without decreasing degradability, Water Research, 42(18), 4699-4709. https://doi.org/10.1016/j.watres.2008.08.019
  3. Guermoud, N., Ouadjnia, F., Abdelmalek, F., and Taleb, F. (2009). Municipal solid waste in Mostaganem city (Western Algeria), Waste Management, 29(2), 896-902. https://doi.org/10.1016/j.wasman.2008.03.027
  4. Jindrich, P., Petr, D., Josef, M., and Michal, D. (2012). Stability and inhibition of anaerobic processes caused by insufficiency or excess of ammonia nitrogen, Applied Microbiology and Biotechnology, 93, 439-447. https://doi.org/10.1007/s00253-011-3625-4
  5. Kim, D. J. and Kim, H. Y. (2010). Sludge solubilization by pre-treatment and its effect on methane production and sludge reduction in anaerobic digestion, Korean Chemical Engineering Research, 48(1), 103-109. [Korean Literature]
  6. Kim, J. R., Sim, S. J., Choi, S. H., and Yeom, I. T. (2004). Sludge reduction through enzymatic pretreatment, Korean Society for Biotechnology and Bioengineering Journal, 19(2), 93-97
  7. Kim, S. H. and Ju, H. J. (2012). Feasibility of co-digestion of sewage sludge, swine waste, and food waste leachate, Journal of the Korea Organic Resource Recycling Association, 20(1), 61-70. [Korean Literature] https://doi.org/10.17137/KORRAE.2012.20.1.61
  8. Lee, D. H., Behera, S. K., Kim, J., and Park, H. S. (2009). Methane production potential of leachate generated from Korean food waste recycling facilities: A lab scale study, Waste Manage, 29, 876-882. https://doi.org/10.1016/j.wasman.2008.06.033
  9. Mata-Alvarez, J. (2002). Biomethanization of the organic fraction of municipal solid wastes, IWA Publishing. 4.
  10. Ministry of Environment (ME). (2013). Statistics of sewerage (Sewarage division), Ministry of Environment, 1397-1423.
  11. Ministry of Environment (ME). (2014). A study on the expansion plan for the integrated digestion of manure and sewage sludge, Ministry of Environment, 56-72.
  12. Oh, H. J. (2018). A study on the methane production efficiency according to the electrical characteristics of bio-electrochemical anaerobic digestion reactor, Master's Thesis, Ho-Seo University, Asan, Korea. [Korean Literature]
  13. Phothilangka, P. (2008). Sludge disintegration technologies for improved biogas yield, Ph. D. Dissertation, The University of Innsbruck, Austria.
  14. Wilson, C. A. and Novak, J. T. (2009). Hydrolysis of macromolecular components of primary and secondary wastewater sludge by thermal hydrolytic pretreatment, Water Research, 43(18), 4489-4498. https://doi.org/10.1016/j.watres.2009.07.022
  15. Zhang, P., Zhang, G., and Wang, W. (2007). Ultrasonic treatment of biological sludge: Floc disintegration, cell lysis and inactivation, Bioresource Technology, 98, 207-210. https://doi.org/10.1016/j.biortech.2005.12.002