Environmental Engineering Research

Korean Society of Environmental Engineers (대한환경공학회)
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Effects of Microwave Pretreatment on Mesophilic Anaerobic Digestion for Mixture of Primary and Secondary Sludges Compared with Thermal Pretreatment

  • Park, Woon-Ji (Department of Environmental Engineering, College of Engineering, Kangwon National University) ;
  • Ahn, Johng-Hwa (Department of Environmental Engineering, College of Engineering, Kangwon National University)
  • Received : 2010.01.18
  • Accepted : 2011.05.31
  • Published : 2011.06.30
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Abstract

This work experimentally determined the effect of thermal and microwave pretreatments on the anaerobic digestion of mixtures of municipal primary and secondary sludges in semi-continuous mesophilic digesters at hydraulic retention times (HRT) of 20, 15, 10, 7, and 5 days. The ratio of soluble chemical oxygen demand (COD) to total COD in thermally pretreated and microwaved sludges at $80^{\circ}C$ was 2.7 and 3.2 times higher than that of raw sludge, respectively. The volatile solids (VS) and COD removal efficiencies in all three digesters fed with raw (control), thermally pretreated (TM), and microwaved (MW) sludges decreased as the HRT was reduced. The highest relative improvement in VS removal compared to the control occurred at the HRT of 5 days in the TM and MW (29 and 41% higher than the control, respectively). At this HRT, improvement in the COD removal efficiencies in the TM and MW compared to the control was 28 and 53%, respectively. Improvements in biogas production compared with the control increased in both the TM and MW as the HRT was reduced to 5 days. The relative improvement in daily biogas production compared to the control from the TM and MW was 33 and 53% higher than the control at the HRT of 5 days, respectively. The results show that microwave pretreatment is more effective than thermal pretreatment in increasing the solubilization degree and mesophilic anaerobic biodegradability of sewage sludge.

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References

  1. Weemaes MPJ, Verstraete WH. Evaluation of current wet sludge disintegration techniques. J. Chem. Technol. Biotechnol. 1998;73:83-92. https://doi.org/10.1002/(SICI)1097-4660(1998100)73:2<83::AID-JCTB932>3.0.CO;2-2
  2. Toreci I, Kennedy KJ, Droste RL. Evaluation of continuous mesophilic anaerobic sludge digestion after high temperature microwave pretreatment. Water Res. 2009;43:1273-1284. https://doi.org/10.1016/j.watres.2008.12.022
  3. Rulkens W. Sewage sludge as a biomass resource for the production of energy: overview and assessment of the various options. Energy Fuels 2008;22:9-15. https://doi.org/10.1021/ef700267m
  4. Tiehm A, Nickel K, Zellhorn M, Neis U. Ultrasonic waste activated sludge disintegration for improving anaerobic stabilization. Water Res. 2001;35:2003-2009. https://doi.org/10.1016/S0043-1354(00)00468-1
  5. Salsabil MR, Prorot A, Casellas M, Dagot C. Pre-treatment of activated sludge: effect of sonication on aerobic and anaerobic digestibility. Chem. Eng. J. 2009;148:327-335. https://doi.org/10.1016/j.cej.2008.09.003
  6. Tanaka S, Kobayashi T, Kamiyama KI, Signey Bildan MLN. Effects of thermochemical pretreatment on the anaerobic digestion of waste activated sludge. Water Sci. Technol. 1997;35:209-215. https://doi.org/10.1016/S0273-1223(97)88229-7
  7. Neyens E, Baeyens J. A review of thermal sludge pre-treatment processes to improve dewaterability. J. Hazard. Mater. 2003;98:51-67. https://doi.org/10.1016/S0304-3894(02)00320-5
  8. Eskicioglu C, Terzian N, Kennedy KJ, Droste RL, Hamoda M. Athermal microwave effects for enhancing digestibility of waste activated sludge. Water Res. 2007;41:2457-2466. https://doi.org/10.1016/j.watres.2007.03.008
  9. Hong SM, Park JK, Lee YO. Mechanisms of microwave irradiation involved in the destruction of fecal coliforms from biosolids. Water Res. 2004;38:1615-1625. https://doi.org/10.1016/j.watres.2003.12.011
  10. Jones DA, Lelyveld TP, Mavrofidis SD, Kingman SW, Miles NJ. Microwave heating applications in environmental engineering-a review. Resour. Conservat. Recycl. 2002;34:75-90. https://doi.org/10.1016/S0921-3449(01)00088-X
  11. Woo IS, Rhee IK, Park HD. Differential damage in bacterial cells by microwave radiation on the basis of cell wall structure. Appl. Environ. Microbiol. 2000;66:2243-2247. https://doi.org/10.1128/AEM.66.5.2243-2247.2000
  12. Gavala HN, Yenal U, Skiadas IV, Westermann P, Ahring BK. Mesophilic and thermophilic anaerobic digestion of primary and secondary sludge. Effect of pre-treatment at elevated temperature. Water Res. 2003;37:4561-4572. https://doi.org/10.1016/S0043-1354(03)00401-9
  13. Hong SM, Park JK, Teeradej N, Lee YO, Cho YK, Park CH. Pretreatment of sludge with microwaves for pathogen destruction and improved anaerobic digestion performance. Water Environ. Res. 2006;78:76-83. https://doi.org/10.2175/106143005X84549
  14. Valo A, Carrere H, Delgenes JP. Thermal, chemical and thermo-chemical pre-treatment of waste activated sludge for anaerobic digestion. J. Chem. Technol. Biotechnol. 2004;79:1197-1203. https://doi.org/10.1002/jctb.1106
  15. Eaton AD, Franson MAH, American Public Health Association, American Water Works Association, Water Environment Federation. Standard methods for the examination of water and wastewater. 21st ed. Washington, DC: American Public Health Association; 2005.
  16. Hong SM. Enhancement of pathogen destruction and anaerobic digestibility using microwaves [dissertation]. Madison, WI: University of Wisconsin-Madison; 2002.
  17. Park B, Ahn JH, Kim J, Hwang S. Use of microwave pretreatment for enhanced anaerobiosis of secondary slugde. Water Sci. Technol. 2004;50:17-23.
  18. Eskicioglu C, Kennedy KJ, Droste RL. Characterization of soluble organic matter of waste activated sludge before and after thermal pretreatment. Water Res. 2006;40:3725-3736. https://doi.org/10.1016/j.watres.2006.08.017
  19. Kennedy KJ, Thibault G, Droste RL. Microwave enhanced digestion of aerobic SBR sludge. Water SA 2007;33:261-270.
  20. Eskicioglu C, Kennedy KJ, Droste RL. Enhancement of batch waste activated sludge digestion by microwave pretreatment. Water Environ. Res. 2007;79:2304-2317. https://doi.org/10.2175/106143007X184069
  21. Eskicioglu C, Kennedy KJ, Droste RL. Initial examination of microwave pretreatment on primary, secondary and mixed sludges before and after anaerobic digestion. Water Sci. Technol. 2008;57:311-317. https://doi.org/10.2166/wst.2008.010
  22. Eskicioglu C, Prorot A, Marin J, Droste RL, Kennedy KJ. Synergetic pretreatment of sewage sludge by microwave irradiation in presence of $H_2O_2$ for enhanced anaerobic digestion. Water Res. 2008;42:4674-4682. https://doi.org/10.1016/j.watres.2008.08.010
  23. Eskicioglu C, Droste RL, Kennedy KJ. Performance of anaerobic waste activated sludge digesters after microwave pretreatment. Water Environ. Res. 2007;79:2265-2273. https://doi.org/10.2175/106143007X176004
  24. Lay JJ, Li YY, Noike T, Endo J, Ishimoto S. Analysis of environmental factors affecting methane production from high-solids organic waste. Water Sci. Technol. 1997;36:493-500. https://doi.org/10.1016/S0273-1223(97)00560-X
  25. Wood N, Tran H, Master E. Pretreatment of pulp mill secondary sludge for high-rate anaerobic conversion to biogas. Bioresour. Technol. 2009;100:5729-5735. https://doi.org/10.1016/j.biortech.2009.06.062
  26. Parkin G, Owen WF. Fundamentals of anaerobic digestion of wastewater sludges. J. Environ. Eng. 1986;112:867-920. https://doi.org/10.1061/(ASCE)0733-9372(1986)112:5(867)
  27. Ahring BK, Sandberg M, Angelidaki I. Volatile fatty acids as indicators of process imbalance in anaerobic digestors. Appl. Microbiol. Biotechnol. 1995;43:559-565. https://doi.org/10.1007/BF00218466

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