Carbon Source Recovery from Waste Activated Sludge by Low-Temperature Thermal Hydrolysis Process
Publication: Journal of Environmental Engineering
Volume 146, Issue 1
Abstract
To recover a preferred carbon source from waste activated sludge (WAS), this study systematically investigated the effects of a low-temperature thermal hydrolysis process (THP) on WAS solubilization and dewaterability at 25°C–120°C for 60 min. Experimental results indicated that organics [soluble chemical oxygen demand (SCOD), proteins, carbohydrates, and lipids] and nutrients (N and P) were efficiently released into the sludge supernatant after THP. Deoxyribonucleic acid (DNA) tests identified 60°C as the threshold of sludge cell disintegration, which increased DNA from nearly . Sludge dewaterability deteriorated after THP, as evidenced by longer filtration times and higher water contents of sludge cake, particularly at 120°C, which was due to the release of abundant soluble extracellular polymeric substances. The optimal heating temperature for carbon source recovery was 80°C, which achieved the highest biodegradability (5-day biochemical oxygen demand/SCOD 0.62), satisfied SCOD/total nitrogen (18.6), and had acceptable dewaterability.
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Acknowledgments
The research was supported by National Natural Science Foundation of China (Grant No. 41877344). The authors deeply appreciate the financial and technological support.
References
Barber, W. P. F. 2016. “Thermal hydrolysis for sewage treatment: A critical review.” Water Res. 104 (Nov): 53–71. https://doi.org/10.1016/j.watres.2016.07.069.
Claire, B., P. D. Jean, and C. Hélène. 2008. “Effects of thermal treatments on five different waste activated sludge samples solubilisation, physical properties and anaerobic digestion.” Chem. Eng. J. 139 (2): 236–244. https://doi.org/10.1016/j.cej.2007.07.099.
Dong, B., X. G. Liu, L. L. Dai, and X. H. Dai. 2013. “Effect of short time low temperature thermal pretreatment on sludge anaerobic digestion.” [In Chinese.] J. Tongji Univ. (Nat. Sci. ed). 41 (5): 716–721. https://doi.org/10.3969/j.issn.0253-374x.2013.05.014.
Feng, X., J. C. Deng, H. Y. Lei, T. Bai, Q. J. Fan, and Z. X. Li. 2009. “Dewaterability of waste activated sludge with ultrasound conditioning.” Bioresour. Technol. 100 (3): 1074–1081. https://doi.org/10.1016/j.biortech.2008.07.055.
Guo, Y. D., L. Guo, M. Sun, Y. G. Zhao, M. C. Gao, and Z. L. She. 2017. “Effects of hydraulic retention time (HRT) on denitrification using waste activated sludge thermal hydrolysis liquid and acidogenic liquid as carbon sources.” Bioresour. Technol. 224 (Jan): 147–156. https://doi.org/10.1016/j.biortech.2016.11.056.
He, D. Q., L. F. Wang, H. Jiang, and H. Q. Yu. 2015. “A Fenton-like process for the enhanced activated sludge dewatering.” Chem. Eng. J. 272 (Jul): 128–134. https://doi.org/10.1016/j.cej.2015.03.034.
Hii, K., S. Baroutian, R. Parthasarathy, D. J. Gapes, and N. Eshtiaghi. 2014. “A review of wet air oxidation and thermal hydrolysis technologies in sludge treatment.” Bioresour. Technol. 155 (4): 289–299. https://doi.org/10.1016/j.biortech.2013.12.066.
Houghton, J. I., and T. Stephenson. 2002. “Effect of influent organic content on digested sludge extracellular polymer content and dewaterability.” Water Res. 36 (14): 3620–3628. https://doi.org/10.1016/S0043-1354(02)00055-6.
Jeong, S. Y., S. W. Chang, H. H. Ngo, W. S. Guo, L. D. Nghiem, J. R. Banu, B. H. Jeon, and D. D. Nguyen. 2019. “Influence of thermal hydrolysis pretreatment on physicochemical properties and anaerobic biodegradability of waste activated sludge with different solids content.” Waste Manage. 85 (Feb): 214–221. https://doi.org/10.1016/j.wasman.2018.12.026.
Kampas, P., S. A. Parsons, P. Pearce, S. Ledoux, P. Vale, J. Churchley, and E. Cartmell. 2007. “Mechanical sludge disintegration for the production of carbon source for biological nutrient removal.” Water Res. 41 (8): 1734–1742. https://doi.org/10.1016/j.watres.2006.12.044.
Li, Q. Q., L. Guo, Y. G. Zhao, Z. L. She, M. C. Gao, and M. M. Liu. 2016. “Effect of pretreatment temperature on excess sludge hydrolysis and its characteristics of fluorescence excitation-emission matrix spectroscopy.” [In Chinese.] Period. Ocean Univ. China 46 (9): 102–106.
Li, X., H. Chen, L. F. Hu, L. Yu, Y. G. Chen, and G. W. Gu. 2011. “Pilot-scale waste activated sludge alkaline fermentation, fermentation liquid separation, and application of fermentation liquid to improve biological nutrient removal.” Environ. Sci. Technol. 45 (5): 1834–1839. https://doi.org/10.1021/es1031882.
Li, Y. Y., Y. Y. Hu, G. H. Wang, W. C. Lan, J. T. Lin, Q. Bi, H. S. Shen, and S. K. Liang. 2014. “Screening pretreatment methods for sludge disintegration to selectively reclaim carbon source from surplus activated sludge.” Chem. Eng. J. 255 (6): 365–371. https://doi.org/10.1016/j.cej.2014.06.034.
Peng, Y. Z., S. Y. Guo, X. Y. Li, Y. L. He, Y. Y. Gao, and L. K. Li. 2017. “Effect of low temperature thermal treatment on organic matter solubilization and dewaterability change of waste activated sludge.” [In Chinese.] J. B. Univ. Technol. 43 (3): 473–480. https://doi.org/10.11936/bjutxb2016070023.
Prorot, A., J. Laurent, C. Dagot, and P. Leprat. 2011. “Sludge disintegration during heat treatment at low temperature: A better understanding of involved mechanisms with a multiparametric approach.” Biochem. Eng. J. 54 (3): 178–184. https://doi.org/10.1016/j.bej.2011.02.016.
SEPA (State Environmental Protection Administration). 2002. Water and wastewater monitoring methods. [In Chinese.] Beijing: Chinese Environmental Science Publishing House, State Environmental Protection Administration.
Sung, H. J., D. M. Francesca, A. Eric, and C. Philip. 2015. “Sustainable approaches for minimizing biosolids production and maximizing reuse options in sludge management: A review.” J. Environ. Manage. 158 (Aug): 133–145. https://doi.org/10.1016/j.jenvman.2015.05.014.
Tyagi, V. K., and S. L. Lo. 2011. “Application of physico-chemical pretreatment methods to enhance the sludge disintegration and subsequent anaerobic digestion: An up to date review.” Rev. Environ. Sci. Bio/Technol. 10 (3): 215–242. https://doi.org/10.1007/s11157-011-9244-9.
Wang, D. B., Y. Y. Duan, Q Yang, Y. W. Liu, B. J. Ni, Q. L. Wang, G. M. Zeng, X. M. Li, and Z. G. Yuan. 2018. “Free ammonia enhances dark fermentative hydrogen production from waste activated sludge.” Water Res. 133 (Apr): 272–281. https://doi.org/10.1016/j.watres.2018.01.051.
Wang, D. B., D. Zhang, Q. X. Xu, Y. W. Liu, Q. L. Wang, B. J. Ni, Q. Yang, X. M. Li, and F. Yang. 2019. “Calcium peroxide promotes hydrogen production from dark fermentation of waste activated sludge.” Chem. Eng. J. 355 (1): 22–32. https://doi.org/10.1016/j.cej.2018.07.192.
Wang, Q. L. 2017. “A roadmap for achieving energy-positive sewage treatment based on sludge treatment using free ammonia.” ACS Sustainable Chem. Eng. 5 (11): 9630–9633. https://doi.org/10.1021/acssuschemeng.7b02605.
Wang, Q. L., H. R. Duan, W. Wei, B. J. Ni, A. Laloo, and Z. G. Yuan. 2017. “Achieving stable mainstream nitrogen removal via the nitrite pathway by sludge treatment using free ammonia.” Environ. Sci. Technol. 51 (17): 9800–9807. https://doi.org/10.1021/acs.est.7b02776.
Wang, Q. L., G. M. Jiang, L. Ye, and Z. G. Yuan. 2014. “Enhancing methane production from waste activated sludge using combined free nitrous acid and heat pre-treatment.” Water Res. 63 (7): 71–80. https://doi.org/10.1016/j.watres.2014.06.010.
Wang, Q. L., L. Ye, G. M. Jiang, and Z. G. Yuan. 2013. “A free nitrous acid (FNA)-based technology for reducing sludge production.” Water Res. 47 (11): 3663–3672. https://doi.org/10.1016/j.watres.2013.04.016.
Wang, Z. J., and W. Wang. 2005. “Thermal hydrolysis test of surplus sludge.” [In Chinese.] China Environ. Sci. 25: 56–60.
Wei, W., X. Zhou, D. B. Wang, J. Sun, and Q. L. Wang. 2017a. “Free ammonia pre-treatment of secondary sludge significantly increases anaerobic methane production.” Water Res. 118: 12–19. https://doi.org/10.1016/j.watres.2017.04.015.
Wei, W., X. Zhou, G. J. Xie, H. R. Duan, and Q. L. Wang. 2017b. “A novel free ammonia based pretreatment technology to enhance anaerobic methane production from primary sludge.” Biotechnol. Bioeng. 114 (10): 2245–2252. https://doi.org/10.1002/bit.26348.
Wu, Y. Q., Y. H. Jiang, G. J. Ke, and Y. J. Liu. 2017. “Effect of gamma-ray irradiation on the dewaterability of waste activated sludge.” Radiat. Phys. Chem. 130 (Jan): 164–170. https://doi.org/10.1016/j.radphyschem.2016.08.011.
Wu, Y. Q., K. Song, Y. H. Jiang, X. Y. Sun, and L. Li. 2018. “Effect of thermal hydrolysis sludge supernatant as carbon source for biological denitrification with pilot-scale two-stage anoxic/oxic process and nitrogen balance model establishment.” Biochem. Eng. J. 139 (Nov): 132–138. https://doi.org/10.1016/j.bej.2018.08.013.
Xue, Y. G., H. J. Liu, S. S. Chen, N. Dichtl, X. H. Dai, and N. Li. 2015. “Effects of thermal hydrolysis on organic matter solubilization and anaerobic digestion of high solid sludge.” Chem. Eng. J. 264 (Mar): 174–180. https://doi.org/10.1016/j.cej.2014.11.005.
Zhang, W. J., P. Yang, X. Y. Yang, Z Chen, and D. S. Wang. 2015. “Insights into the respective role of acidification and oxidation for enhancing anaerobic digested sludge dewatering performance with Fenton process.” Bioresour. Technol. 181 (Apr): 247–253. https://doi.org/10.1016/j.biortech.2015.01.003.
Zhang, Y. X., P. Y. Zhang, J. B. Guo, W. F. Ma, and L. P. Xiao. 2013. “Spectroscopic analysis and biodegradation potential study of dissolved organic matters in sewage sludge treated with high-pressure homogenization.” Bioresour. Technol. 135 (2): 616–621. https://doi.org/10.1016/j.biortech.2012.09.034.
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©2019 American Society of Civil Engineers.
History
Received: Jan 17, 2019
Accepted: Jun 5, 2019
Published online: Oct 30, 2019
Published in print: Jan 1, 2020
Discussion open until: Mar 30, 2020
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