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[57660] Artykuł:

Evaluation of the impact of operational parameters and particular filamentous bacteria on activated sludge volume index - a case study

Czasopismo: Rocznik Ochrona Środowiska   Tom: 18, Strony: 480-491
ISSN:  1506-218X
Wydawca:  MIDDLE POMERANIAN SCI SOC ENV PROT, KOLLATAJA 1-1, KOSZALIN, 75-448, POLAND
Opublikowano: 2016
 
  Autorzy / Redaktorzy / Twórcy
Imię i nazwisko Wydział Katedra Procent
udziału
Liczba
punktów
Elżbieta Bezak-Mazur orcid logoWiŚGiEKatedra Technologii Wody i Ścieków335.00  
Renata Stoińska orcid logoWiŚGiEKatedra Technologii Wody i Ścieków335.00  
Bartosz Szeląg orcid logoWiŚGiEKatedra Geotechniki, Geomatyki i Gospodarki Odpadami*335.00  

Grupa MNiSW:  Publikacja w czasopismach wymienionych w wykazie ministra MNiSzW (część A)
Punkty MNiSW: 15
Klasyfikacja Web of Science: Article


Web of Science Logo Web of Science    
Keywords:

filamentous bacteria  sludge volume index  logistic regression 



Abstract:

Sludge sedimentation depends on various factors like: air temperature, quality of wastewater (BOD), characteristics of a bioreactor (sludge age, oxygen concentration in nitrification chamber, recirculation rate, concentration of sludge in a bioreactor), dosage of coagulants for phosphorus removal and a presence of filamentous bacteria. However, still there is a lack of a mathematical model that would established the dependency between all these inputs, because of their number, and sludge sedimentation. In the presented study, such model is proposed, moreover its structure allows for a direct interpretation of its parameters, making it especially useful for operators of treatment plants.

The article presents the application of the logistic regression for the estimation of sludge sedimentation potential, using the characteristic of the sludge (concentration and temperature) in a respect of the presence of filamentous bacteria. The sludge deterioration was measured using a threshold a value of the Sludge Volume Index (SVI = 150 mg/dm(3)). Results suggests that Sphaerotilus natans and Nostocoida sp. bacteria are the most noticeable factor for the sludge deterioration and the sediment potential.