Optimization of biogas production from sewage sludge

Mohamed Belaid, Anthony Njuguna Matheri, Itumeleng Constance Lelosa, Edison Muzenda, Ishmael Ramatsa

Research output: Contribution to journalConference articlepeer-review


It is widely known that the degradation of waste activated sludge is a slow process with a low extent of degradation. Improvement methods with regards to bio-methane yield were investigated in this study using a laboratory batch anaerobic digester. Mono-digestion of sludge with a C: N ratio of 15.47 resulted in a lower accumulation of gas volume than co-digested sludge even though the pH decreased rapidly in both cases. The thermophillic anaerobic digestion of sludge and co-digested sludge also produced higher bio-methane yield than mesophillic digestion of waste water sludge. Gas accumulation volume in the digesters during thermophillic digestion increased from 50 Nml to 100 Nml, 200 Nml to 600 Nml and 600 Nml to 750 Nml for sludge, cow dung and sludge and sludge and food waste respectively as the temperature was increased from 37°C to 45°C.

Original languageEnglish
Pages (from-to)1702-1709
Number of pages8
JournalProceedings of the International Conference on Industrial Engineering and Operations Management
Issue numberMAR
Publication statusPublished - 2019
Externally publishedYes
Event9th International Conference on Industrial Engineering and Operations Management, IEOM 2019 - Bangkok, Thailand
Duration: Mar 5 2019Mar 7 2019

All Science Journal Classification (ASJC) codes

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


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