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Effects of calcium carbonate on pyrolysis of sewage sludge

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  • Kwon, Eilhann E.
  • Lee, Taewoo
  • Ok, Yong Sik
  • Tsang, Daniel C.W.
  • Park, Chanhyuk
  • Lee, Jechan

Abstract

This study demonstrates that calcium carbonate (CaCO3) allows not only enhancement of the production of CO as syngas, but also reduction of the content of polycyclic aromatic hydrocarbons (PAHs) in the pyrolytic products from sewage sludge. CO2 was formed by the decomposition of CaCO3 in pyrolysis. The CO2 derived from CaCO3 enhanced thermal cracking of volatile organic carbons (VOCs) generated during the pyrolysis of sewage sludge and provided an additional source of C and O, likely enhancing the production of CO at >650 °C. In addition, more solid product was converted into gaseous and liquid products by the addition of CaCO3 in the pyrolysis of sewage sludge. This work suggests that CaCO3 can be used as an inexpensive source of CO2 that increases thermal efficiency of the pyrolysis process and reduces the evolution of harmful chemical species such as PAHs during thermal treatment of the byproduct during processing at municipal and industrial wastewater treatment facilities (i.e., sewage sludge).

Suggested Citation

  • Kwon, Eilhann E. & Lee, Taewoo & Ok, Yong Sik & Tsang, Daniel C.W. & Park, Chanhyuk & Lee, Jechan, 2018. "Effects of calcium carbonate on pyrolysis of sewage sludge," Energy, Elsevier, vol. 153(C), pages 726-731.
    • Handle: RePEc:eee:energy:v:153:y:2018:i:c:p:726-731
    DOI: 10.1016/j.energy.2018.04.100
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    References listed on IDEAS

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    1. Lee, Jechan & Yang, Xiao & Song, Hocheol & Ok, Yong Sik & Kwon, Eilhann E., 2017. "Effects of carbon dioxide on pyrolysis of peat," Energy, Elsevier, vol. 120(C), pages 929-936.
    2. Kim, Jieun & Kim, Ki-Hyun & Kwon, Eilhann E., 2016. "Enhanced thermal cracking of VOCs evolved from the thermal degradation of lignin using CO2," Energy, Elsevier, vol. 100(C), pages 51-57.
    3. Fytili, D. & Zabaniotou, A., 2008. "Utilization of sewage sludge in EU application of old and new methods--A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 12(1), pages 116-140, January.
    4. Lee, Jechan & Yang, Xiao & Cho, Seong-Heon & Kim, Jae-Kon & Lee, Sang Soo & Tsang, Daniel C.W. & Ok, Yong Sik & Kwon, Eilhann E., 2017. "Pyrolysis process of agricultural waste using CO2 for waste management, energy recovery, and biochar fabrication," Applied Energy, Elsevier, vol. 185(P1), pages 214-222.
    5. Ajay Kumar & David D. Jones & Milford A. Hanna, 2009. "Thermochemical Biomass Gasification: A Review of the Current Status of the Technology," Energies, MDPI, vol. 2(3), pages 1-26, July.
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    4. Liu, Xianjie & Feng, Qian & Peng, Zhigang & Zheng, Yong & Liu, Huan, 2020. "Preparation and evaluation of micro-encapsulated thermal control materials for oil well cement slurry," Energy, Elsevier, vol. 208(C).
    5. Lee, Taewoo & Jung, Sungyup & Kim, Ki-Hyun & Kwon, Eilhann E., 2021. "Catalytic pyrolysis of pine bark over Ni/SiO2 in a CO2 atmosphere," Energy, Elsevier, vol. 220(C).
    6. Vladimír Frišták & Martin Pipíška & Dominika Koperová & Reinhard Jagerhofer & Gerhard Soja & Stephen M. Bell, 2022. "Utilization of Sewage Sludge-Derived Pyrogenic Material as a Promising Soil Amendment," Agriculture, MDPI, vol. 12(3), pages 1-13, March.
    7. Jung, Sungyup & Lee, Jechan & Moon, Deok Hyun & Kim, Ki-Hyun & Kwon, Eilhann E., 2021. "Upgrading biogas into syngas through dry reforming," Renewable and Sustainable Energy Reviews, Elsevier, vol. 143(C).
    8. Liu, Yang & Ran, Chunmei & Siddiqui, Azka R. & Siyal, Asif Ali & Song, Yongmeng & Dai, Jianjun & Chtaeva, Polina & Fu, Jie & Ao, Wenya & Deng, Zeyu & Jiang, Zhihui & Zhang, Tianhao, 2020. "Characterization and analysis of sludge char prepared from bench-scale fluidized bed pyrolysis of sewage sludge," Energy, Elsevier, vol. 200(C).
    9. Xing, Xinxin & Zhao, Hongyu & Zhou, Lili & Wang, Yangang & Chen, Haijun & Gao, Ying & Wang, Yinfeng & Zhu, Yuezhao, 2022. "Pyrolysis kinetics, thermodynamics of PTA sludge and product characterization of cyclic in-situ catalytic pyrolysis by using recycled char as a catalyst," Energy, Elsevier, vol. 251(C).
    10. Park, Chanyeong & Choi, Heeyoung & Andrew Lin, Kun-Yi & Kwon, Eilhann E. & Lee, Jechan, 2021. "COVID-19 mask waste to energy via thermochemical pathway: Effect of Co-Feeding food waste," Energy, Elsevier, vol. 230(C).

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