title: Influence of sludge properties and hydraulic loading on the performance of secondary settling tanks--full-scale operational results.
abstract: Full-scale investigations at a WWTP with a two-stage secondary settling tank process revealed relationships between significant operating parameters and performance in terms of effluent suspended solids concentration. Besides common parameters (e.g. surface overflow rate and sludge volume loading rate) feed SS concentration and flocculation time must be considered. Concentration of the return activated sludge may help to estimate the performance of existing secondary settling tanks.
authors.affiliation: Institute of Hydrosciences, Faculty of Civil Engineering and Surveying, University of the Federal Armed Forces Munich, Germany.
authors.forename: R J
authors.initials: RJ
authors.lastname: Vestner
authors.forename: F Wolfgang
authors.initials: FW
authors.lastname: Günthert
mesh_terms: D019149:Bioreactors; D005858:Germany; D008962:Models, Theoretical; D012722:Sewage; D013997:Time Factors; D014865:Waste Disposal, Fluid / Q000295:instrumentation* / Q000379:methods*; D014867:Water; D014872:Water Movements; D018508:Water Purification / Q000295:instrumentation* / Q000379:methods*
chemical_list: D012722:Sewage; D014867:Water