Value addition of brewers spent grains to bio coal using hydrothermal carbonization

M. M. Manyuchi, M. Mugoronji, C. Mbohwa, E. Muzenda

Research output: Contribution to journalConference articlepeer-review


The production of alternative energy sources from waste residues is increasingly becoming popular. This paper focuses on the value addition of brewery spent grains waste by converting it to bio coal using hydrothermal carbonization. Brewery spent grains (BSG) from a local brewery company were used to determine the potential of making bio coal that can be used as a replacement to the conventional fossil fuel. Hydrothermal carbonization was conducted at 200 °C at a pressure of 25 bars for a residence time of 2 hours. The BSG were mixed with wastewater in the ratio 5:1. The bio coal that was produced had a calorific value of 26.1 MJ/kg and a fixed carbon content of 53.1%. The calorific values and fixed carbon were slightly higher than the conventional fossil coal which is an indication than BSG provides an alternative source of raw material for bio coal production, a source of renewable energy.

Original languageEnglish
Pages (from-to)2648-2652
Number of pages5
JournalProceedings of the International Conference on Industrial Engineering and Operations Management
Issue numberSEP
Publication statusPublished - 2018
Event3rd North American IEOM Conference. IEOM 2018 -
Duration: Sept 27 2018Sept 29 2018

All Science Journal Classification (ASJC) codes

  • Strategy and Management
  • Management Science and Operations Research
  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering


Dive into the research topics of 'Value addition of brewers spent grains to bio coal using hydrothermal carbonization'. Together they form a unique fingerprint.

Cite this