Document Detail

Stirred anaerobic sequencing batch reactor containing immobilized biomass: a behavior study when submitted to different fill times.
MedLine Citation:
PMID:  15303756     Owner:  NLM     Status:  MEDLINE    
The effect of the filling stage on the behavior of a mechanically stirred anaerobic sequencing batch reactor containing biomass immobilized on 1 cm polyurethane foam cubes was investigated. The reactor was made of acrylic with a capacity of 6.3 L, treating per cycle 2.5 L synthetic low-strength wastewater with a concentration of 500 mgCOD/L, at 30+/-1 degrees C. Eight-hour cycles (tC) and agitation of 500 rpm were utilized. At the beginning of each cycle 60% of the wastewater volume was treated, sufficient to completely cover the bed. The remaining volume was added at different fill times (tF) of 10, 120, 240, 260 and 480 min. The results obtained showed that ratios of tF/tC < or = 0.5 enabled organic matter removal higher than 75% and 70% for filtered and non-filtered samples, respectively. Ratios of tF/tC > 0.5, despite operation stability, resulted in loss of efficiency and formation of viscous material, similar to extra-cellular polymeric substances.
A C Borges; R R Siman; J A D Rodrigues; S M Ratusznei; M Zaiat; E Foresti; W Borzani
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Water science and technology : a journal of the International Association on Water Pollution Research     Volume:  49     ISSN:  0273-1223     ISO Abbreviation:  Water Sci. Technol.     Publication Date:  2004  
Date Detail:
Created Date:  2004-08-11     Completed Date:  2004-10-18     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9879497     Medline TA:  Water Sci Technol     Country:  England    
Other Details:
Languages:  eng     Pagination:  311-8     Citation Subset:  IM    
Departamento de Hidráulica e Saneamento, Escola de Engenharia de São Carlos, Universidade de São Paulo, Av Trabalhador São-Carlense, CEP, São Carlos-SP, Brasil.
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MeSH Terms
Bacteria, Anaerobic / physiology
Time Factors
Waste Disposal, Fluid / methods*
Water Movements

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