INFLUENCE OF SOLID RETENTION TIME ON RHEOLOGY OF MBR SLUDGE (Articolo in rivista)

Type
Label
  • INFLUENCE OF SOLID RETENTION TIME ON RHEOLOGY OF MBR SLUDGE (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.2166/wst.2007.715 (literal)
Alternative label
  • GIORDANO C., POLLICE A., LAERA G., SATURNO D., MININNI G. (2007)
    INFLUENCE OF SOLID RETENTION TIME ON RHEOLOGY OF MBR SLUDGE
    in Water science and technology; International Water Association, London (Regno Unito)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • GIORDANO C., POLLICE A., LAERA G., SATURNO D., MININNI G. (literal)
Pagina inizio
  • 151 (literal)
Pagina fine
  • 159 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://www.iwaponline.com/wst/05608/wst056080151.htm (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 56 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 9 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 8 (literal)
Note
  • Scopus (literal)
  • Science direct - Elsevier (literal)
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • CNR Istituto di Ricerca Sulle Acque, Viale F. De Blasio 5, 70123 Bari, Italy CNR Istituto di Ricerca Sulle Acque, Via Reno 1, 00198 Roma, Italy (literal)
Titolo
  • INFLUENCE OF SOLID RETENTION TIME ON RHEOLOGY OF MBR SLUDGE (literal)
Abstract
  • The rheological characterization is of crucial importance in sludge management both for biomass dewatering and stabilization purposes and for the definition of design parameters for sludge handling operations. The sludge retention time (SRT) has a significant influence on biomass properties in biological wastewater treatment systems and in particular in membrane bioreactors (MBR). The aim of this work is to compare the rheological behaviour of the biomass in a membrane bioreactor operated under different SRT. A bench scale MBR was operated for four years under the same conditions except for the SRT, that ranged from 20 days to complete sludge retention. The rheological properties were measured over time and the apparent viscosity was correlated with the concentration of solid material under equilibrium conditions. The three models most commonly adopted for rheological simulations were evaluated and compared in terms of their parameters. Steady state average values of these parameters were related to the equilibrium biomass concentration (MLSS). The models were tested to select the one better fitting the experimental data in terms of Mean Root Square Error (MRSE). The relationship between the apparent viscosity and the shear rate, as a function of solid concentration, was determined and proposed. (literal)
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