The energetic and treatment efficiency analysis of an existing Mechanical and Biological Treatment (MBT) plant shows that more than 60% of the 25 kWh consumed per each tonne of Non Differentiated Waste (NDW) treated is due to the electric fans. About 7.5 kWh per tonne of NDW is used for supplying the process air for stabilizing the Waste Organic Fraction (WOF). Exploitation of the Solid Anaerobic Digestion Batch (SADB) for processing the WOF before it enters the aerobic section of the MBT leads to the production of biogas and subsequently when fed to a gas engine, electric power in a magnitude of about 150 kWh per tonne of WOF, resulting in an energy surplus of about 48 kWh per tonne of NDW treated by the MBT facility. The SADB can also reduce the Organic Load Rate at which the aerobic section operates up to 40%, leading to further positive effects on the whole MBT process.
Upgrading of a Mechanical Biological Treatment (MBT) plant with a Solid Anaerobic Digestion Batch: A Real Case Study
DI MARIA, Francesco
2012
Abstract
The energetic and treatment efficiency analysis of an existing Mechanical and Biological Treatment (MBT) plant shows that more than 60% of the 25 kWh consumed per each tonne of Non Differentiated Waste (NDW) treated is due to the electric fans. About 7.5 kWh per tonne of NDW is used for supplying the process air for stabilizing the Waste Organic Fraction (WOF). Exploitation of the Solid Anaerobic Digestion Batch (SADB) for processing the WOF before it enters the aerobic section of the MBT leads to the production of biogas and subsequently when fed to a gas engine, electric power in a magnitude of about 150 kWh per tonne of WOF, resulting in an energy surplus of about 48 kWh per tonne of NDW treated by the MBT facility. The SADB can also reduce the Organic Load Rate at which the aerobic section operates up to 40%, leading to further positive effects on the whole MBT process.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
