*2.5.3 Factors influencing digester's efficiency and performance*

There are many factors that influence anerobic digestion and biogas production, e.g., biogas potential of feedstock, nature of the substrates, inoculums, digestion pH, temperature, digester loading rate, hydraulic retention time (HRT), carbon/nitrogen (C:N) ratio, presence of volatile fatty acids (VFA), presence inhibitory substances, etc. [101].
