Explanations:

Calculation of theoretical slurry potential

Y_Sl =  N_A · Sl_i

where:

Y_Sl – theoretical slurry potential (m³/year)

N_A – number of animals (number)

Sl_i – the indices of average slurry production:

Calculation of slurry biogas yield

Q_Sl = Y_Sl · B_c

where:

Q_Sl – biogas yield potential of slurry (m³/year)

Y_Sl – theoretical slurry yield (Mg/year)

B_c – biogas conversion coefficient:

• 1 Mg cattle slurry (8-11% org. dry matter) 25 m³ biogas
• 1 Mg pig slurry (7% org. dry matter) 20 m³ biogas

Calculation of slurry biomethane yield

Q_SlCH4 = Y_Sl · BM_c

where:

Q_SlCH4 – biomethane yield potential of slurry (m³/year)

Y_Sl – theoretical slurry yield (Mg/year)

BM_c – biomethane conversion coefficient:

• 1 Mg cattle slurry (8-11% org. dry matter) 15 m³ biomethane
• 1 Mg pig slurry (7% org. dry matter) 12 m³ biomethane