Non-isothermal thermogravimetric kinetic analysis of the thermochemical conversion of human faeces

B. Fidalgo, M. Chilmeran, T. Somorin, A. Sowale, A. Kolios, A. Parker, L. Williams, M. Collins, E. J. McAdam, S. Tyrrel

Research output: Contribution to journalArticle

Abstract

The “Reinvent the Toilet Challenge” set by the Bill & Melinda Gates Foundation aims to bring access to adequate sanitary systems to billions of people. In response to this challenge, on-site sanitation systems are proposed and being developed globally. These systems require in-situ thermal treatment, processes that are not well understood for human faeces (HF). Thermogravimetric analysis has been used to investigate the pyrolysis, gasification and combustion of HF. The results are compared to the thermal behaviour of simulant faeces (SF) and woody biomass (WB), along with the blends of HF and WB. Kinetic analysis was conducted using non-isothermal kinetics model-free methods, and the thermogravimetric data obtained for the combustion of HF, SS and WB. The results show that the devolatilisation of HF requires higher temperatures and rates are slower those of WB. Minimum temperatures of 475 K are required for fuel ignition. HF and SF showed similar thermal behaviour under pyrolysis, but not under combustion conditions. The activation energy for HF is 157.4 kJ/mol, relatively higher than SS and WB. Reaction order for HF is lower (n = 0.4) to WB (n = 0.6). In-situ treatment of HF in on-site sanitary systems can be designed for slow progressive burn.

LanguageEnglish
Pages1177-1184
Number of pages8
JournalRenewable Energy
Volume132
Early online date29 Aug 2018
DOIs
Publication statusPublished - 1 Mar 2019

Fingerprint

Biomass
Kinetics
Pyrolysis
Sanitation
Gasification
Ignition
Thermogravimetric analysis
Activation energy
Heat treatment
Temperature
Hot Temperature

Keywords

  • combustion
  • human faeces
  • kinetics
  • nano membrane toilet
  • pyrolysis
  • thermogravimetric analysis

Cite this

Fidalgo, B. ; Chilmeran, M. ; Somorin, T. ; Sowale, A. ; Kolios, A. ; Parker, A. ; Williams, L. ; Collins, M. ; McAdam, E. J. ; Tyrrel, S. / Non-isothermal thermogravimetric kinetic analysis of the thermochemical conversion of human faeces. In: Renewable Energy. 2019 ; Vol. 132. pp. 1177-1184.
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Fidalgo, B, Chilmeran, M, Somorin, T, Sowale, A, Kolios, A, Parker, A, Williams, L, Collins, M, McAdam, EJ & Tyrrel, S 2019, 'Non-isothermal thermogravimetric kinetic analysis of the thermochemical conversion of human faeces' Renewable Energy, vol. 132, pp. 1177-1184. https://doi.org/10.1016/j.renene.2018.08.090

Non-isothermal thermogravimetric kinetic analysis of the thermochemical conversion of human faeces. / Fidalgo, B.; Chilmeran, M.; Somorin, T.; Sowale, A.; Kolios, A.; Parker, A.; Williams, L.; Collins, M.; McAdam, E. J.; Tyrrel, S.

In: Renewable Energy, Vol. 132, 01.03.2019, p. 1177-1184.

Research output: Contribution to journalArticle

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AU - Fidalgo, B.

AU - Chilmeran, M.

AU - Somorin, T.

AU - Sowale, A.

AU - Kolios, A.

AU - Parker, A.

AU - Williams, L.

AU - Collins, M.

AU - McAdam, E. J.

AU - Tyrrel, S.

PY - 2019/3/1

Y1 - 2019/3/1

N2 - The “Reinvent the Toilet Challenge” set by the Bill & Melinda Gates Foundation aims to bring access to adequate sanitary systems to billions of people. In response to this challenge, on-site sanitation systems are proposed and being developed globally. These systems require in-situ thermal treatment, processes that are not well understood for human faeces (HF). Thermogravimetric analysis has been used to investigate the pyrolysis, gasification and combustion of HF. The results are compared to the thermal behaviour of simulant faeces (SF) and woody biomass (WB), along with the blends of HF and WB. Kinetic analysis was conducted using non-isothermal kinetics model-free methods, and the thermogravimetric data obtained for the combustion of HF, SS and WB. The results show that the devolatilisation of HF requires higher temperatures and rates are slower those of WB. Minimum temperatures of 475 K are required for fuel ignition. HF and SF showed similar thermal behaviour under pyrolysis, but not under combustion conditions. The activation energy for HF is 157.4 kJ/mol, relatively higher than SS and WB. Reaction order for HF is lower (n = 0.4) to WB (n = 0.6). In-situ treatment of HF in on-site sanitary systems can be designed for slow progressive burn.

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KW - human faeces

KW - kinetics

KW - nano membrane toilet

KW - pyrolysis

KW - thermogravimetric analysis

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DO - 10.1016/j.renene.2018.08.090

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JO - Renewable Energy

T2 - Renewable Energy

JF - Renewable Energy

SN - 0960-1481

ER -