NOMENCLATURE

TS	Total solid: It is a solid part after removing water content from a feed material.
TD	Total discharge: It is the sum of total solid and water content inside the materials.
AD	Anaerobic digestion
HRT	Hydraulic retention time: It is a measure of the average length of time that a soluble compound remains in a constructed bioreactor.
Vgs	Volume of gas storage: It is the top area of the digester where gas is stored.
Vs	Volume of sludge layer: It is the bottom area of the digester where sludge is accumulated.
Vf	Volume of fermentation: It is the middle area of the digester where feed materials are fermented.
Q	Total influent: It is the mixture of water and total discharge.
COD	Chemical oxygen demand: It is the mass of oxygen consumed per liter of solution.
CO2	Carbon dioxide
CH4	Methane
H2S	Hydrogen sulfide
m3	Cubic meter