title: Effect of process parameters on greenhouse gas generation by wastewater treatment plants.
abstract: The effect of key process parameters on greenhouse gas (GHG) emission by wastewater treatment plants was evaluated, and the governing parameters that exhibited major effects on the overall on- and off-site GHG emissions were identified. This evaluation used aerobic, anaerobic, and hybrid anaerobic/aerobic treatment systems with food processing industry wastewater. The operating temperature of anaerobic sludge digester was identified to have the highest effect on GHG generation in the aerobic treatment system. The total GHG emissions of 2694 kg CO2e/d were increased by 72.5% with the increase of anaerobic sludge digester temperature from 20 to 40 degrees C. The operating temperature of the anaerobic reactor was the dominant controlling parameter in the anaerobic and hybrid treatment systems. Raising the anaerobic reactor's temperature from 25 to 40 degrees C increased the total GHG emissions from 5822 and 6617 kg CO2e/d by 105.6 and 96.5% in the anaerobic and hybrid treatment systems, respectively.
authors.affiliation: Department of Building Civil and Environmental Engineering, Concordia University, Montreal, Quebec, Canada.
authors.forename: L
authors.initials: L
authors.lastname: Yerushalmi
authors.forename: M Bani
authors.initials: MB
authors.lastname: Shahabadi
authors.forename: F
authors.initials: F
authors.lastname: Haghighat
mesh_terms: D000332:Aerobiosis; D000397:Air Pollution / Q000032:analysis* / Q000517:prevention & control; D000693:Anaerobiosis; D004784:Environmental Monitoring; D005525:Food-Processing Industry; D005740:Gases / Q000032:analysis*; D017752:Greenhouse Effect; D007220:Industrial Waste; D014865:Waste Disposal, Fluid
chemical_list: D005740:Gases; D007220:Industrial Waste