Table 1

Typical mass flows of bioenergy potentials of municipal wastewater treatment plants

Mass flowsLiterature valuesUnit
Primary sludge (tPC = 0.5 h)a 30.00 g/(I*d)
Primary sludge (tPC = 1.0 h)a 35.00 g/(I*d)
Primary sludge (tPC = 2.0 h)a 40.00 g/(I*d)
Secondary sludge (tSA = 5 d, tPC = 0.5 h)a,b 46.30 g/(I*d)
Secondary sludge (tSA = 5 d, tPC = 1.0 h)a,b 41.10 g/(I*d)
Secondary sludge (tSA = 5 d, tPC = 2.0 h)a,b 35.80 g/(I*d)
Secondary sludge (tSA = 10 d, tPC = 0.5 h)a,b 42.00 g/(I*d)
Secondary sludge (tSA = 10 d, tPC = 1.0 h)a,b 37.30 g/(I*d)
Secondary sludge (tSA = 10 d, tPC = 2.0 h)a,b 32.40 g/(I*d)
Secondary sludge (tSA = 15 d, tPC = 0.5 h)a,b 39.30 g/(I*d)
Secondary sludge (tSA = 15 d, tPC = 1.0 h)a,b 34.80 g/(I*d)
Secondary sludge (tSA = 15 d, tPC = 2.0 h)a,b 30.20 g/(I*d)
Secondary sludge (tSA = 25 d)b 56.20 g/(I*d)
Tertiary sludge 3.60 g/(I*d)
Digester gas 0.02 m³/(I*d)
Mass flowsLiterature valuesUnit
Primary sludge (tPC = 0.5 h)a 30.00 g/(I*d)
Primary sludge (tPC = 1.0 h)a 35.00 g/(I*d)
Primary sludge (tPC = 2.0 h)a 40.00 g/(I*d)
Secondary sludge (tSA = 5 d, tPC = 0.5 h)a,b 46.30 g/(I*d)
Secondary sludge (tSA = 5 d, tPC = 1.0 h)a,b 41.10 g/(I*d)
Secondary sludge (tSA = 5 d, tPC = 2.0 h)a,b 35.80 g/(I*d)
Secondary sludge (tSA = 10 d, tPC = 0.5 h)a,b 42.00 g/(I*d)
Secondary sludge (tSA = 10 d, tPC = 1.0 h)a,b 37.30 g/(I*d)
Secondary sludge (tSA = 10 d, tPC = 2.0 h)a,b 32.40 g/(I*d)
Secondary sludge (tSA = 15 d, tPC = 0.5 h)a,b 39.30 g/(I*d)
Secondary sludge (tSA = 15 d, tPC = 1.0 h)a,b 34.80 g/(I*d)
Secondary sludge (tSA = 15 d, tPC = 2.0 h)a,b 30.20 g/(I*d)
Secondary sludge (tSA = 25 d)b 56.20 g/(I*d)
Tertiary sludge 3.60 g/(I*d)
Digester gas 0.02 m³/(I*d)

aDwell time of the wastewater in the primary clarifier (PC).

bSludge age (SA) in the activation basin.

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