title: Carbonate addition--an effective remedy against poor activated sludge settling properties and alkalinity conditions in small wastewater treatment plants.
abstract: The impact of marble powder on the performance of small seasonal treatment plants dealing with high ammonia concentrated wastewater has been investigated. The carbonate has been added to one of two parallel lab-scale SBR-systems as an alkalinity depot and a bio-carrier. The focus of the monitoring program was put on the measurement of carbon fractions in the liquid and the solid phase and on the alkalinity conditions. Monitoring results show a significant correlation between carbonate dosage (and corresponding inorganic carbon concentration and pH-value) and sludge volume index and nitrification rate.
authors.affiliation: Department of Environmental Engineering, University of Innsbruck, Technikerstr.13, A-6020 Innsbruck, Austria. bernhard.wett@uibk.ac.at
authors.forename: B
authors.initials: B
authors.lastname: Wett
authors.forename: A
authors.initials: A
authors.lastname: Eladawy
authors.forename: W
authors.initials: W
authors.lastname: Becker
mesh_terms: D000641:Ammonia / Q000032:analysis*; D002254:Carbonates / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D012621:Seasons; D012722:Sewage / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D002254:Carbonates; D012722:Sewage; D000641:Ammonia