Anaerobic treatment of municipal wastewater using the UASB-technology.
The anaerobic treatment of municipal wastewater enables new applications for the reuse of wastewater. The effluent could be used for irrigation as the included nutrients are not affected by the treatment. Much more interesting now are renewable energies and the retrenchment of CO(2) emission. With the anaerobic treatment of municipal wastewater, not only can the CO(2) emission be reduced but "clean" energy supply can be gained by biogas. Most important for the sustainability of this process is the gathering of methane from the liquid effluent of the reactor, because the negative climate-relevant effect from the degassing methane is much higher than the positive effect from saving CO(2) emission. In this study, UASB reactors were used with a flocculent sludge blanket for the biodegradation of the carbon fraction in the wastewater with different temperatures and concentrations. It could be shown that the positive effect is much higher for municipal wastewater with high concentrations in hot climates.
Institute of Water Quality and Waste Management (ISAH), Leibniz Universität Hannover, Welfengarten 1, Hannover, Germany. urban@isah.uni-hannover.de
I
I
Urban
D
D
Weichgrebe
K-H
KH
Rosenwinkel
D000693:Anaerobiosis; D019149:Bioreactors; D002245:Carbon Dioxide / Q000378:metabolism; D003246:Conservation of Energy Resources; D005308:Fertilizers; D008697:Methane / Q000378:metabolism; D009584:Nitrogen / Q000378:metabolism; D010758:Phosphorus / Q000378:metabolism; D012722:Sewage; D014865:Waste Disposal, Fluid / Q000379:methods*
D005308:Fertilizers; D012722:Sewage; D002245:Carbon Dioxide; D010758:Phosphorus; D009584:Nitrogen; D008697:Methane