Biogas production from three-phase olive mill solid waste in lab-scale continuously stirred tank reactor. (15th March 2019)

• Record Type: Journal Article
• Authors: Al Afif, Rafat; Linke, Bernd
• Is Part Of: Energy. Volume 171(2019)
• Page Start: 1046
• Page End: 1052
• Publication Date: 2019-03-15
• Subjects: Biogas -- Three-phase olive mill solid waste -- Continuously stirred tank reactor -- Addition of enzyme -- Thermophilic condition; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Energy consumption -- Periodicals; 333.7905
• DOI: 10.1016/j.energy.2019.01.080
• Languages: English
• ISSNs: 0360-5442

Abstract

Abstract: Biogas production of three-phase olive mill solid waste (3POMSW) was studied in lab-scale continuously stirred tank reactors (CSTR) at organic loading rates of 1.5–2.0 g VS L −1 d −1 and temperatures of 35 and 55 °C. To acclimate microorganisms to 3POMSW the start-up phase was performed under thermophilic and mesophilic conditions for 40 days. In order to improve the biogas yield, the enzyme MethaPlus ® was added and its effect was investigated. Results indicate that thermophilic processing has a higher biogas yield by 8% compared to mesophilic conditions, but there was no significant difference in methane yield. Under thermophilic conditions, addition of the enzyme to 3POMSW resulted in a significant increase in methane yield by 10%. Under mesophilic conditions, the enzyme did not have a significant effect on biogas yield or reactor performance. The quality of biogas for all experiments was sufficient. Long-term experimentation indicated the beginning of reactor failure.