한국물환경학회지 (Journal of Korean Society on Water Environment)

  • 제35권4호
  • /
  • Pages.299-307
  • /
  • 2019
  • /
  • 2289-0971(pISSN)
  • /
  • 2289-098X(eISSN)
한국물환경학회 (Korean Society on Water Environment)
권호 표지
DOI QR코드

DOI QR Code

잉여슬러지를 이용한 저온 열적전처리 및 바이오 가스 특성 평가

Evaluation of Low-temperature Thermal Pre-treatment and Biogas Characteristics using Waste Activated Sludge

  • 최재훈 (경기대학교 일반대학원) ;
  • 정성엽 ((주)환경에너지오앤엠 기술연구소) ;
  • 김지태 (경기대학교 창의공과대학 환경에너지공학과)
  • Choi, Jae-Hoon (Department of Graduate School, Kyonggi University) ;
  • Jeong, Seong-Yeob (Environment Energy O&M Institute of Technology) ;
  • Kim, Ji-Tae (Department of Environmental Enggineering, Colleage of Engineering, Kyonggi University)
  • 투고 : 2018.09.10
  • 심사 : 2019.06.20
  • 발행 : 2019.07.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

The purpose of this study was to investigate the effect of low temperature thermal pre-treatment on biodegradation of waste activated sludge for anaerobic digestion as a countermeasure for increasing sludge generation. The experimental condition was accomplished in 2 %, 4 %, and 6 % TS concentration, and $70^{\circ}C$, $80^{\circ}C$, $90^{\circ}C$ of temperature for a maximum of 120 minutes retention time. Then, it was followed by analysis of physical/chemical properties, BMP test and composition of biogas. The biogas characteristic was evaluated by applying the modified Gomperz model. As a result, solubility of dissolved substrate, such as $SCOD_{Cr}$, soluble carbohydrate, and soluble protein, and biogas production increased as temperature increased. Solubilization efficiency at $90^{\circ}C$ was 18.4 %, 17.03 % and 16.88% in 2 %, 4 %, and 6 % TS concentration respectively. Also, solubilization rates of carbohydrate and protein similarly increased. BMP test results also showed that methane production in excess sludge increased to 0.194, 0.187 and $0.182m^3/kg$ VS. respectively, and lag phase decreased to 0.145, 0.220, 0.351 day due to acceleration of the hydrolysis step. Consequently, low-temperature thermal pre-treatment could increase biodegradability of sludge, positively affecting biogas production and sludge reduction.

키워드

SJBJB8_2019_v35n4_299_f0001.png 이미지

Fig. 1. Thermo pre-treatment reactor

SJBJB8_2019_v35n4_299_f0002.png 이미지

Fig. 2. Impact of pre-treatment temperature on characteristics (a) : TS 2% WAS (b) : TS 4% WAS (c) : TS 6% WAS

SJBJB8_2019_v35n4_299_f0003.png 이미지

Fig. 3. Impact of pre-treatment condition on solubilization (a) : TS 2% WAS (b) : TS 4% WAS (c) : TS 6% WAS

SJBJB8_2019_v35n4_299_f0004.png 이미지

Fig. 4. Impact of pre-treatment condition on carbohydrate and protein. (a) : TS 2% WAS (b) : TS 4% WAS (c) : TS 6% WAS

SJBJB8_2019_v35n4_299_f0005.png 이미지

Fig. 5. BMP test: Cumulative methane production from the modified gompertz model (a) : TS 2% WAS (b) : TS 4% WAS (c) : TS 6% WAS

Table 1. Characteristics of WAS

SJBJB8_2019_v35n4_299_t0001.png 이미지

Table 2. Biogas analysis conditions

SJBJB8_2019_v35n4_299_t0002.png 이미지

Table 3. Comparative of study on optimization of pretreatment process

SJBJB8_2019_v35n4_299_t0003.png 이미지

Table 4. Summary of fitted results methane yields following the modified gompertzmodel.

SJBJB8_2019_v35n4_299_t0004.png 이미지

참고문헌

  1. American Public Health Association, American Water Works Association and Water Environment Federation (APHA, AWWA, WEF). (2005). Standard methods for the examination of water & wastewater, Health association Washington, D. C., USA.
  2. Appels, L., Baeyens, J., Degreve, J., and Dewil, R. (2008). Principles and potential of the anaerobic digestion of waste-activated sludge, Progress in Energy and Combustion Science, 34(6), 755-781. https://doi.org/10.1016/j.pecs.2008.06.002
  3. Bougrier, C., Albasi, C., Delgenes, J. P., and Carrere, H. (2006). Effect of ultrasonic, thermal and ozone pre-treatments on waste activated sludge solubilisation and anaerobic biodegradability, Chemical Engineering and Processing:Process Intensification, 45(8), 711-718. https://doi.org/10.1016/j.cep.2006.02.005
  4. Bougrier, C., Carrere, H., and Delgenes, J. P. (2005). Solubilisation of waste-activated sludge by ultrasonic treatment, Chemical Engineering Journal, 106(2), 163-169. https://doi.org/10.1016/j.cej.2004.11.013
  5. Bougrier, C., Delgenes, P. J., and Carrere, H. (2008). Effects of thermal treatments on five different waste activated sludge samples solubilisation, physical properties and anaerobic digestion, Chemical Engineering Journal, 139(2), 236-244. https://doi.org/10.1016/j.cej.2007.07.099
  6. Chang, C. J., Tyagi, V. K., and Lo, S. L. (2011). Effects of microwave and alkali induced pretreatment on sludge solubilization and subsequent aerobic digestion, Bioresource Technology, 102(17), 7633-7640. https://doi.org/10.1016/j.biortech.2011.05.031
  7. Choi, J. S., Kim, H. G., and Joo, H. J. (2014). Solid Reduction and Methane Production of Food Waste Leachate using Thermal Solubilization, Journal of Korean Society on Water Environment, 30(5), 559-567. [Korean Literature] https://doi.org/10.15681/KSWE.2014.30.5.559
  8. Devlin, C. D., Esteves, R. R. S., Dinsdale, M. R., and Guwy, J. A. (2011). The effect of acid pretreatment on the anaerobic digestion and dewatering of waste activated sludge, Bioresource Technology, 102(5), 4076-4082. https://doi.org/10.1016/j.biortech.2010.12.043
  9. Dubois, M., Gilles, A. K., Hamilton, K. J., Rebers, A. P., and Smith, F. (1956). Colorimetric method for determination of sugars and related substances, Analytical Chemistry, 28(3), 350-356. https://doi.org/10.1021/ac60111a017
  10. 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
  11. Eskicioglu, C., Kennedy, J. K., and Droste, L. R. (2006). Characterization of soluble organic matter of waste activated sludge before and after thermal pretreatment, Water Research, 40(20), 3725-3736. https://doi.org/10.1016/j.watres.2006.08.017
  12. Esposito, G., Frunzo, L., Liotta1, F., Panico, A., and Pirozzi. F. (2012). Bio-methane potential tests to measure the biogas production from the digestion and co-digestion of complex organic substrates, The Open Environmental Engineering Journal, 5, 5-8.
  13. Jain, S., Jain, S., Wolf, T. I., Lee, J., and Tonga, W. Y. (2015). A comprehensive review on operating parameters and different pretreatment methodologies for anaerobic digestion of municipal solid waste, Renewable and Sustainable Energy Reviews, 52, 142-154. https://doi.org/10.1016/j.rser.2015.07.091
  14. Jeong, S. Y. (2016). A study on thermal pretreatment of the wastewater sludge to improve anaerobic digestion efficiency:performance, energy balance and economical assessment, Ph. D. Dissertation, Kyonggi University, 55-57. [Korean Literature]
  15. Jeong, S. Y., Jung, S. Y., and Chang, S. W. (2014). Enhancement of anaerobic biodegradabilityand solubilization by thermal pre-treatment of waste activated sludge, New & Renewable Energy, 10(1), 20-29. [Korean Literature] https://doi.org/10.7849/ksnre.2014.10.1.020
  16. Kang, H., Jeong, J. H., Kim, J. Y., Moon, Y. T., and Seo, I. S. (2007). Degree of solubilization of wasted activated sludge treated by several pretreatment methods, Environmental Engineering Research, 2007(12), 1370-1376. [Korean Literature]
  17. Kang, H., Oh, B. Y., and Shin, K. S. (2015). Anaerobic treatment of leachjate solubilized from themal hydrolysis of sludge cake, Journal of Korean Society of Environmental Engineers, 37(10), 583-589. [Korean Literature] https://doi.org/10.4491/KSEE.2015.37.10.583
  18. Kim, D. J. (2013). Pre-treatment technology of wastewater sludge for enhanced biogas production in anaerobic digestion, Clean Technology, 19(4), 355-369. [Korean Literature] https://doi.org/10.7464/ksct.2013.19.4.355
  19. Kim, J. S., Park, C. W., Kim, T. H., Lee, M. G., Kim, S. Y., Kim, S. W., and Lee, J. W. (2003). Effects of various pretreatments for enhanced anaerobic digestion with waste activated sludge, Journal of Bioscience and Bio engineering, 95(3), 271-275. https://doi.org/10.1016/S1389-1723(03)80028-2
  20. Liao, X., Li, H., Zhang, Y., Liu, C., and Chen, Q. (2016). Accelerated high-solids anaerobic digestion of sewage sludge using low-temperature thermal pretreatment, International Biodeterioration & Biodegradation, 106, 141-149. https://doi.org/10.1016/j.ibiod.2015.10.023
  21. Lowry, H. O., Rosebrough, J. N., Farr, L. A., and Randall, J. R. (1951) Protein measurement with the folin phenol reagent, Journal of Biological Chemistry, 193, 265-275. https://doi.org/10.1016/S0021-9258(19)52451-6
  22. Ministry of Environment (ME). (2016). 2015 Organic Waste Resource Energy Facilities, Ministry of Environment, Department of Waste Resources and Energy, 1-7.
  23. Muller, J. A. (2000). Pretreatment processes for the recycling and reuse of sewage sludge, Water Science and Technology, 42(9), 167-174. https://doi.org/10.2166/wst.2000.0197
  24. Namkung, K. C. and Jeon, H. O. (2010). Pretreatment of waste-activated sludge for enhancement of methane production, The Korean Society for Applied Microbiology and Biotechnologyl, 38(4), 362-372. [Korean Literature]
  25. Nazari, L., Yuan, Z., Santoro, D., Sarathy, S., Ho, D., Batstone, D., Xu, C. C., and Ray, B. M. (2017). Low-temperature thermal pre-treatment of municipal wastewater sludge:Process optimization and effects on solubilization and anaerobic degradation, Water Research, 113, 111-123 https://doi.org/10.1016/j.watres.2016.11.055
  26. Nguyen, D. D., Chang, S. W., Jeong, S. Y., Jeung, J. H., Kim, S. S., Guo, W., and Ngo, H. H. (2016). Dry thermophilic semi-continuous anaerobic digestion of food waste:Performance evaluation, modified Gompertz model analysis, and energy balance, Energy Conversion and Management, 128(15), 203-210. https://doi.org/10.1016/j.enconman.2016.09.066
  27. Ruiz-Hernando, M., Martin-Diaz, J., Labanda, J., Mata-Alvarez, J., Llorens, J., Lucena, F., Astals, S. (2014). Effect of ultrasound, low-temperature thermal and alkali pre-treatments on waste activated sludge rheology, hygienization and methane potential, Water Research, 61, 119-129. https://doi.org/10.1016/j.watres.2014.05.012
  28. Salsabil, R. M., Laurent, J., Casellas, M., and Dagot, C. (2010). Techno-economic evaluation of thermal treatment, ozonation and sonication for the reduction of wastewater biomass volume before aerobic or anaerobic digestion, Journal of Hazardous Materials, 174(1-3), 323-333. https://doi.org/10.1016/j.jhazmat.2009.09.054
  29. Sung, S. H. and Liu, T. (2003). Ammonia inhibition on thermophilic anaerobic digestion, Chemosphere, 53(1), 43-52. https://doi.org/10.1016/S0045-6535(03)00434-X
  30. Tyagi, V. K. and Lo, S. L. (2013). Sludge A waste or renewable source for energy and resources recovery, Renewable and Sustainable Energy Review, 25(C), 708-728. https://doi.org/10.1016/j.rser.2013.05.029
  31. Val del Rio, A., Morales, N., Isanta, E., Mosquera Corral, J., Campos, L., Steyer, P. J., and Carrere, H. (2011). Thermal pre-treatment of aerobic granular sludge: Impact on anaerobic biodegradability, Water Research, 45(18), 6011-6020. https://doi.org/10.1016/j.watres.2011.08.050
  32. Wilson, C. A. and Novak, J. T. (2009). Hydrolysis of macromolecular components of primary and secondary wastewater sludge by thermal hydrolytic pretreat ment, Water Research, 43(18), 4489-4498. https://doi.org/10.1016/j.watres.2009.07.022