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http://dx.doi.org/10.15681/KSWE.2019.35.4.362

Evaluation of Physical Shear Pre-treatment and Biogas Characteristics using Mixed Sludge  

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)
Publication Information
Journal of Korean Society on Water Environment / v.35, no.4, 2019 , pp. 362-369 More about this Journal
Abstract
In this study, biodegradation efficiency improvement of mixed sludge for the anaerobic digestion process in wastewater treatment plant was investigated. In order to release the organic material contained in the sludge cell and promote the hydrolysis step, mixed sludge of 7% TS (Total Solids) was physically shear-treated at a shear strength of 1,000 ~ 4,000 rpm and a maximum of 120 mins. As a result of the comparison between mixed sludge before and after the treatment, the concentration of $SCOD_{Cr}$(Soluble Chemical Oxygen Demand-chromium method) was increased through the conversion of granular organic matter into dissolved organic matter as shear strength and treatment time increases. The solubilization efficiency increased rapidly after 30 min of solubilization application time, and they were 11.23 %, 20.10 %, 22.52 % and 25.43% at 120 min for each shear strength conditions, respectively. Additionally, the BMP(Biochemical Methane Potential) test was conducted with the optimized samples to determine the increase of methane production by the shear pre-treatment. Consequently, methane production of each samples were 0.275, 0.310, 0.323 and $0.335m^3/kg\;VS_{add}$, which indicates that methane production was increased to a maximum of 21.28% compared to the control without the solubilization process ($0.262m^3/kg\;VS_{add}$). As a result, the physical shear-treatment is a promising process for sewage sludge pre-treatment to reduce the organic waste and increase the energy production.
Keywords
BMP test; Mixed Sludge; Shear Pre-treatment; Solubilization;
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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 Bougrier, C., Delgenes, J. P., and Carrere, H. (2007). Impacts of thermal pretreatments on the semi-continuous anaerobic digestion of waste activated sludge, Biochemical Engineering Journal, 34(1), 20-27.   DOI
3 Carrere, H., Dumas, C., Battimelli, A., Batstone, D. J., Delgenes, J. P., Steyer, J. P., and Ferrer, I. (2010). Pretreatment methods to improve sludge anaerobic degradability: A review, Journal of Hazardous Materials, 183(1-3), 1-15.   DOI
4 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]   DOI
5 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.   DOI
6 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.   DOI
7 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.
8 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]   DOI
9 Hwang, Y. G. (2008). Study on sludge solubilization using fisintegrato, Master's Thesis, Youngnam University, 1-2. [Korean Literature]
10 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]   DOI
11 Kim, D. H., Cho, S. K., Lee, M. K., and Kim, M. S. (2013). Increased solubilization of excess sludge does not always result in enhanced anaerobic digestion efficiency, Bioresource Technology, 143, 660-664.   DOI
12 Kim, D. H., Jeong, E., Oh, S. E., and Shin, H. S. (2010). Combined (alkaline + ultrasonic) pretreatment effect on sewage sludge disintegration, Water Rsearch, 44, 3093-3100.
13 Ministry of Environment (ME). (2016). Statics of sewerage 2015, Sewerage Division, 14-15.
14 Kim, D. J. and Kim, H. Y. (2010). Sludge slubilization 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]
15 Kim, H. J., Kim, T. K., Ko, G. B., Kim, Y. K., and Park, S. U. (2016). Characteristics of material movement in thermal pretreatment reaction, Proceedings of the 2016 Spring Co-Conference of the Korean Society on Water Environment and Korean Society of Water and Wastewater, 209-210 [Korean Literature]
16 Kim, S. G., Lee, S. J., Lee, J. B., Son, B. K., and Lee, K. H. (2017). A study on dewatering and drying characteristics of sewage waste water sludge, Journal of Korea Society of Waste Management, 34(7), 668-677. [Korean Literature]   DOI
17 Sahinkaya, S. and Sevimli, M. F. (2013). Synergistic effects of sono-alkaline pretreatment on anaerobic biodegradability of waste activated sludge, Journal of Industrial and Engineering Chemistry, 19, 197-206.   DOI
18 Montusiewicz, A., Lebiocka, M., Rozej, A., Zacharska, E., and Pawlesowski, L. (2010). Freezing/thawing effects on anaerobic digestion of mixed sewage sludge, Bioresource Technologsssssey, 101(10), 3466-3473.   DOI
19 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   DOI
20 Rani, R. U., Kumar, S. A., Kaliappan, S., Yeom, I. T., and Banu. J. R. (2012). Low temperature thermo-chemical pretreatment of dairy waste activated sludge for anaerobic digestion process, Bioresource Technology, 103(1), 415-424.   DOI
21 Shelton, D. and Tiedje, J. (1984). General method fordetermining anaerobic biodegradation potential, Applied Environmental Microbiology, 47(4), 850-857.   DOI
22 Wett, B. B., Phothilangka, P., and Eladawy, A. (2010). Systematic comparison of mechanical and thermal sludge disintegration technologies, Waste Management, 30(6), 1057-1062.   DOI
23 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.   DOI