(2017) Journal of Cleaner Production_Rapid conversion of fat, oil and grease (FOG) into biodiesel without pre-treatment of FOG

Lee J., Jung J.-M., Park C., Jeon B.-H., Wang C.-H., Lee S.-R., Kwon E.E.

(Elsevier Ltd) Journal of Cleaner Production ISSN: 9596526 Vol.168 Issue. Article No. DOI: 10.1016/j.jclepro.2017.09.096
 

In this study, the conversion of fat, oil and grease (FOG) into fatty acid methyl esters (FAMEs) without pre-treatment of FOG is investigated. A thermally induced process to accomplish simultaneous esterification of free fatty acids (FFAs) and transesterification of lipids is introduced. Despite high contents of impurities in FOG (∼14 wt%), the maximum achievable yield of FAMEs on feedstock mass basis was >86% for 10 s reaction time without removal of impurities prior to the reaction while conventional acid catalyzed reaction only produced <27.7% FAMEs from FOG. This means that the introduced technique can be effective for the conversion of low-quality raw material (e.g., FOG) into biodiesel. This study would suggest the potential not only for developing a sustainable integrated treatment process of FOG requiring no separation of lipids and FFAs in wastewater treatment facilities but also for using FOG as a renewable energy resource. © 2017 Elsevier Ltd

This work was supported by the New & Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) granted financial resource from the Ministry of Trade, Industry & Energy, Republic of Korea (No. 20163010092290 ). Appendix A