High-Temperature Microwave NaOH Pretreatment of Waste-Activated Sludge for Anaerobic Digestion
Publication: Journal of Environmental Engineering
Volume 141, Issue 8
Abstract
The research reported in this paper determined the effect of combined microwave irradiation and NaOH pretreatment on solubilization and biodegradation in anaerobic digestion of waste-activated sludge (WAS). Solubilization increased significantly with NaOH concentration () and microwave final temperature (100–170°C). However, the experimental trials did not adequately approximate the response surface for volatile solids reduction, cumulative biogas production, and biogas yield. Within the design boundaries, the maximum solubilization degree (72%) of WAS occurred at and 170°C. The highest volatile solids removal efficiency (62.4%) was achieved at and 170°C. Cumulative biogas production and yield were and added volatile solids, respectively, and both parameters were highest at and 135°C.
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Acknowledgments
The research reported in this paper was supported by the Korea Ministry of Environment and Korea Environmental Industry and Technology Institute.
References
APHA (American Public Health Association). (2005). Standard methods for the examination of water and wastewater, 5220C, 21st Ed., Washington, DC.
Appels, L., Baeyens, J., Degrève, J., and Dewil, R. (2008). “Principles and potential of the anaerobic digestion of waste-activated sludge.” Prog. Energy Combust., 34(6), 755–781.
Appels, L., Degrève, J., Van der Bruggen, B., Van Impe, J., and Dewil, R. (2010). “Influence of low temperature thermal pre-treatment on sludge solubilisation, heavy metal release and anaerobic digestion.” Bioresour. Technol., 101(15), 5743–5748.
Carlsson, M., Lagerkvist, A., and Morgan-Sagastume, F. (2012). “The effects of substrate pre-treatment on anaerobic digestion systems: A review.” Waste Manage., 32(9), 1634–1650.
Carrère, H., et al. (2010). “Pretreatment methods to improve sludge anaerobic degradability: A review.” J. Hazard. Mater., 183(1–3), 1–15.
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.” Bioresour. Technol., 102(17), 7633–7640.
Chi, Y., Li, Y., Fei, X., Wang, S., and Yuan, H. (2011). “Enhancement of thermophilic anaerobic digestion of thickened waste activated sludge by combined microwave and alkaline pretreatment.” J. Environ. Sci., 23(8), 1257–1265.
Dogan, I., and Sanin, F. D. (2009). “Alkaline solubilization and microwave irradiation as a combined sludge disintegration and minimization method.” Water Res., 43(8), 2139–2148.
Erden, G. (2013). “Combination of alkaline and microwave pretreatment for disintegration of meat processing wastewater sludge.” Environ. Technol., 34(6), 711–718.
Eskicioglu, C., Kennedy, K. J., and Droste, R. L. (2006). “Characterization of soluble organic matter of waste activated sludge before and after thermal pretreatment.” Water Res., 40(20), 3725–3736.
Eskicioglu, C., Kennedy, K. J., and Droste, R. L. (2007a). “Enhancement of batch waste activated sludge digestion by microwave pretreatment.” Water Environ. Res., 79(11), 2304–2317.
Eskicioglu, C., Kennedy, K. J., and Droste, R. L. (2008a). “Initial examination of microwave pretreatment on primary, secondary and mixed sludges before and after anaerobic digestion.” Water Sci. Technol., 57(3), 311–317.
Eskicioglu, C., Prorot, A., Marin, J., Droste, R. L., and Kennedy, K. J. (2008b). “Synergetic pretreatment of sewage sludge by microwave irradiation in presence of for enhanced anaerobic digestion.” Water Res., 42(18), 4674–4682.
Eskicioglu, C., Terzian, N., Kennedy, K. J., Droste, R. L., and Hamoda, M. (2007b). “Athermal microwave effects for enhancing digestibility of waste activated sludge.” Water Res., 41(11), 2457–2466.
Hong, S. M., Park, J. K., and Lee, Y. O. (2004). “Mechanisms of microwave irradiation involved in the destruction of fecal coliforms from biosolids.” Water Res., 38(6), 1615–1625.
Jang, J.-H. (2012). “Anaerobic digestion of waste activated sludge using microwave and alkali pretreatment.” M.S. thesis, Kangwon National Univ., Gangwon, South Korea.
Kennedy, K. J., Thibault, G., and Droste, R. L. (2007). “Microwave enhanced digestion of aerobic SBR sludge.” Water SA, 33(2), 261–270.
Kim, D.-H., Jeong, E., Oh, S.-E., and Shin, H.-S. (2010). “Combined (alkaline + ultrasonic) pretreatment effect on sewage sludge disintegration.” Water Res., 44(10), 3093–3100.
Kim, J. S., et al. (2003). “Effect of various pretreatments for enhanced anaerobic digestion with waste activated sludge.” J. Biosci. Bioeng., 95(3), 271–275.
Li, H., Li, C., Liu, W., and Zou, S. (2012). “Optimized alkaline pretreatment of sludge before anaerobic digestion.” Bioresour. Technol., 123, 189–194.
Minitab 16 [Computer software]. State College, PA, Minitab Inc.
Monlau, F., Latrille, E., Da Costa, A. C., Steyer, J.-P., and Carrère, H. (2013). “Enhancement of methane production from sunflower oil cakes by dilute acid pretreatment.” Appl. Energy, 102, 1105–1113.
Neyens, E., and Baeyens, J. (2003). “A review of thermal sludge pre-treatment processes to improve dewaterability.” J. Hazard. Mater., 98(1–3), 51–67.
Park, B., Ahn, J.-H., Kim, J., and Hwang, S. (2004). “Use of microwave pretreatment for enhanced anaerobiosis of secondary sludge.” Water Sci. Technol., 50(9), 17–23.
Park, W.-J., and Ahn, J.-H. (2011a). “Effects of microwave pretreatment on mesophilic anaerobic digestion for mixture of primary and secondary sludges compared with thermal pretreatment.” Environ. Eng. Res., 16(2), 103–109.
Park, W.-J., and Ahn, J.-H. (2011b). “Optimization of microwave pretreatment conditions to maximize methane production and methane yield in mesophilic anaerobic sludge digestion.” Environ. Technol., 32(13), 1533–1540.
Park, W.-J., Ahn, J.-H., Hwang, S., and Lee, C.-K. (2010). “Effect of output power, target temperature, and solid concentration on the solubilization of waste activated sludge using microwave irradiation.” Bioresour. Technol., 101(Supplement 1), S1–S16.
Qiao, W., Wang, W., Xun, R., Lu, W., and Yin, K. (2008). “Sewage sludge hydrothermal treatment by microwave irradiation combined with alkali addition.” J. Mater. Sci., 43(7), 2431–2436.
Rulkens, W. (2008). “Sewage sludge as a biomass resource for the production of energy: Overview and assessment of the various options.” Energy Fuels, 22(1), 9–15.
Salsabil, M. R., Prorot, A., Casellas, M., and Dagot, C. (2009). “Pre-treatment of activated sludge: Effect of sonication on aerobic and anaerobic digestibility.” Chem. Eng. J., 148(2–3), 327–335.
Tiehm, A., Nickel, K., Zellhorn, M., and Neis, U. (2001). “Ultrasonic waste activated sludge disintegration for improving anaerobic stabilization.” Water Res., 35(8), 2003–2009.
Toreci, I., Kennedy, K. J., and Droste, R. L. (2009). “Evaluation of continuous mesophilic anaerobic sludge digestion after high temperature microwave pretreatment.” Water Res., 43(5), 1273–1284.
Weemaes, M. P. J., and Verstraete, W. H. (1998). “Evaluation of current wet sludge disintegration techniques.” J. Chem. Technol. Biotechnol., 73(2), 83–92.
Zhang, G., Yang, J., Liu, H., and Zhang, J. (2009). “Sludge ozonation: Disintegration, supernatant changes and mechanisms.” Bioresour. Technol., 100(3), 1505–1509.
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© 2015 American Society of Civil Engineers.
History
Received: Mar 25, 2014
Accepted: Dec 3, 2014
Published online: Jan 21, 2015
Discussion open until: Jun 21, 2015
Published in print: Aug 1, 2015
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