In this project, we converted municipal solid organic waste into volatile fatty acids (VFAs) and biogas through a two-step process. The study consists of pre-pilot studies, statistical tests, and mass flow analyses for economic and technical assessment. The files attached to this repository contained code manuscripts for statistical analysis, data imputation, raw experimental data, mass flow model, kinetics study, and digester design. The experimental data are biogas content, VFA content, pH, hydraulic retention time, organic loading rate, total solids, volatile solids, ammonia, and phosphate concentration. In addition, we did calculations for some performance parameters.