Symbols  Descriptions and Units  Equations  

ṁin  Mass flow of fresh input slurry^{a} (kg day^{1})  Eq.2  
ṁFM  Mass flow of fresh manure^{a}  
ṁMfact  Factor of mass fresh manure (0.6)  
TS_{FM}  Total solid of fresh manure (%)  
TS_{in}  Total solid of input slurry (%) equals to 7.5  
V_{D}  Volume of digestion (m^{3}) 
Eq.3 Eq.4 

hrt  Hydraulic retention time (day) equals to 40  
ϱin  Density of input slurry (kg m^{3}) equals to 1  
L_{R}  Loading rate (kg_{vs} m^{3}_{diester }day^{1}) equals to ~1.5  
ṁVS  Mass flow of volatile solid of input (kg_{vs} day^{1})  
B_{yield}  Biogas yield (m^{3} year^{1})  Eq.5  
B_{sumrate}  Biogas summer rate (m^{3} kg_{vs}^{1 }in summer)  
B_{winrate}  Biogas winter rate (m^{3} kg_{vs}^{1} in winter)  
d_{sum}  Summer days with an average temperature of 26ºC  
d_{win}  Winter days with an average temperature of 15ºC  
B_{available}  Biogas available (m^{3} year^{1})  Eq.6  
B_{loss}  Biogas loss (%) equals to 10 