Can I read SFGP 2007 - The Effects of Sludge Digester Biogas Recovery on WWTP Ecological Impacts and Exergetic Balance on EtoBox?

SFGP 2007 - The Effects of Sludge Digester Biogas Recovery on WWTP Ecological Impacts and Exergetic Balance by Mehdi Belhani; Marie-Noëlle Pons; Dominique Alonso is a Engineering article available to read on EtoBox.

What is SFGP 2007 - The Effects of Sludge Digester Biogas Recovery on WWTP Ecological Impacts and Exergetic Balance about?

Exergetic Life Cycle Assessment (ELCA) is applied to a wastewater treatment plant (WWTP) by activated sludge in order to demonstrate the environmental and exergetic effect of biogas recovery within the whole system boundaries. Two methods of recovery are compared: a simple burner (Burner scenario) and a combined heat and power engine (CHP scenario). The results showed that biogas recovery reduces the depletion of natural resources and decreases ecological impacts. Eutrophication, toxicity and ecotoxicity impacts are not affected by biogas recovery in the Burner scenario and the change is not significant in the CHP scenario. Irreversibility is added to the system by biogas recovery. This is because of the nature of the burnt mixture, which is different from conventional fossil fuel and because of the addition of units such as CHP and heat exchangers. The CHP fed with the biogas cannot fulfill the total demand in thermal energy for heating and drying in comparison to the burner. Natural gas should be burnt additionally and a heat exchanger introduced. The irreversibility of the CHP scenario is larger than the Burner's one, but the former allows reducing electricity consumption by 22.

Who reads SFGP 2007 - The Effects of Sludge Digester Biogas Recovery on WWTP Ecological Impacts and Exergetic Balance?

Author

Mehdi Belhani; Marie-Noëlle Pons; Dominique Alonso

Publisher

Walter de Gruyter GmbH

Published

2008

Language

EN

Field

Engineering (Physical Sciences)