Energy Integration in Wastewater Treatment Plants by Anaerobic Digestion of Urban Waste: A Process Design and Simulation Study

Table 3

Daily plant-wide energy balance of WWTP using AD and codigestion of sewage sludge.

Aspect	Units	Scenario 1	Scenario 2	Scenario 3
WWTP EE consumption	kWh	−1,193	−1,223	−1,325
EE production (by CHP)	kWh	+522	+632	+1,395
AD HW consumption	kWh	−253	−253	−397
HW production (by CHP)	kWh	+474	+481	+1,268
TH steam consumption	kWh	0	−267	0
Steam production (by CHP)	kWh	+396	+574	+1,061
EE self-sufficiency	%	44	52	105
Thermal self-sufficiency	%	344	203	587