(NH3-N) content was examined using the spectrophotometer (HACH, DR/2500). The composition of methane in the biogas produced was analyzed using a gas chromatography equipped with a thermal conductivity
(NH3-N) content was examined using the spectrophotometer (HACH, DR/2500). The composition of methane in the biogas produced was analyzed using a gas chromatography equipped with a thermal conductivity