IMPROVING PRIMARY TREATMENT OF URBAN WASTEWATER WITH LIME-INDUCED COAGULATION (Articolo in rivista)

Type

• Prodotto della ricerca (Classe)
• Articolo in rivista (Classe)

Label

• IMPROVING PRIMARY TREATMENT OF URBAN WASTEWATER WITH LIME-INDUCED COAGULATION (Articolo in rivista) (literal)

Anno

• 2004-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

• 10.1002/adic.200490049 (literal)

Alternative label

• MARANI D., RAMADORI R., BRAGUGLIA C.M. (2004)
  IMPROVING PRIMARY TREATMENT OF URBAN WASTEWATER WITH LIME-INDUCED COAGULATION
  in Annali di chimica (Testo stamp.)
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• MARANI D., RAMADORI R., BRAGUGLIA C.M. (literal)

Pagina inizio

• 399 (literal)

Pagina fine

• 408 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 94 (literal)

Rivista

• Annali di chimica (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali

• 10 (literal)

Note

• ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• CNR-IRSA (literal)

Titolo

• IMPROVING PRIMARY TREATMENT OF URBAN WASTEWATER WITH LIME-INDUCED COAGULATION (literal)

Abstract

• The enhancement of primary treatment efficiency through the coagulation process may yield several advantages, including lower aeration energy in the subsequent biological unit and higher recovery of biogas from sludge digestion. In this work sewage coagulation with lime was studied at pilot plant level, using degritted sewage from the city of Rome. The work aimed at optimising the operating conditions (coagulant dosage or treatment pH, and mixing conditions in the coagulation and flocculation tanks), in order to maximise the efficiency of suspended Chemical Oxygen Demand (COD) removal and to minimise sludge production. Lime dosage optimisation resulted in an optimal treatment pH of 9. Lime addition up to pH 9 may increase COD removal rate in the primary treatment from typical 30-35% of plain sedimentation up to 55-70%. Within the velocity gradients experimented in this work (314-795 s(-1) for the coagulation tank and 13-46 s(-1) for the flocculation tank), mixing conditions did not significantly affect the lime-enhanced process, which seems to be controlled by slow lime dissolution. Sludge produced in the lime-enhanced process settled and compacted easily, inducing an average 36% decrease in sludge volume with respect to plain settling. However excess sludge was produced, which was not accounted for by the amount of suspended solids removed. This is probably due to incomplete dissolution of lime, which may be partially incorporated in the sludge. (literal)

Prodotto di

• Water research institute (IRSA) (Istituto)

Autore CNR

• ROBERTO RAMADORI (Unità di personale interno)
• CAMILLA MARIA BRAGUGLIA (Unità di personale interno)
• DARIO MARANI (Persona)

Incoming links:

Prodotto

• Water research institute (IRSA) (Istituto)

Autore CNR di

• CAMILLA MARIA BRAGUGLIA (Unità di personale interno)
• ROBERTO RAMADORI (Unità di personale interno)
• DARIO MARANI (Persona)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Annali di chimica (Rivista)