Modelling the kinetic of biogas production from co-digestion of pig waste and grass clippings

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14 Citations (Scopus)


This work investigated the use of laboratory batch anaerobic digester to derive kinetics parameters for anaerobic co-digestion of pig waste and grass clippings. Laboratory experiment data from 10 litres batch anaerobic digester operating at ambient mesophilic temperature of 37°C and pH of 6.9 was used to derive parameters for modified Gompertz model. The carbon/nitrogen (CIN) ratio of Pig waste was found to be 16.16 and grass clippings to be 20.54. Through co-digestion in ratio of 1:1, the C/N ratio settled at 17.28. The actual biogas yield was found to be 7725 ml/g COD. In the model of biogas production prediction, the kinetics constants of A (ml/g COD), u (ml/g COD. day), X. (day) was 7920.70, 701.35, 1.61 respectively with coefficient of determination (R2) of 0.9994. Modified Gompertz plot showed better correlation of cumulative biogas production and these results show biogas production can be enhanced from co-digestion of substrates.

Original languageEnglish
Title of host publicationWCE 2016 - World Congress on Engineering 2016
EditorsS. I. Ao, S. I. Ao, Len Gelman, S. I. Ao, Len Gelman, David W.L. Hukins, Andrew Hunter, Alexander M. Korsunsky
PublisherNewswood Limited
Number of pages8
ISBN (Electronic)9789881404800
Publication statusPublished - 2016
EventWorld Congress on Engineering 2016, WCE 2016 - London, United Kingdom
Duration: 29 Jun 20161 Jul 2016

Publication series

NameLecture Notes in Engineering and Computer Science
ISSN (Print)2078-0958


ConferenceWorld Congress on Engineering 2016, WCE 2016
Country/TerritoryUnited Kingdom


  • Anaerobic
  • Co-digestion
  • Kinetics
  • Mesophilic temperature
  • Modified Gompertz

ASJC Scopus subject areas

  • Computer Science (miscellaneous)


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