Document Detail


Symbiotic algal bacterial wastewater treatment: effect of food to microorganism ratio and hydraulic retention time on the process performance.
MedLine Citation:
PMID:  17591209     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Algal incorporation into the biomass is important in an innovative wastewater treatment that exploits the symbiosis between bacterial activated sludge and microalgae (Chlorella vulgaris sp. Hamburg). It allows a good and easy algae separation by means of clarification. The effect of process parameters food to microorganisms ratio (F/M) and hydraulic retention time (HRT) on the process performance, evaluated by settleability, microalgae incorporation to biomass and nutrient removal, was studied. HRT hinted at a significant influence in the growth rate of algae, while F/M turned out to be important for stability when algae are incorporated into the biomass. This parameter also affects the total nitrogen removal of the treatment. Stable flocs with incorporated algae and supernatants with low free swimming algae concentrations were obtained at high HRT and low F/M values.
Authors:
M Medina; U Neis
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Publication Detail:
Type:  Comparative Study; 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:  55     ISSN:  0273-1223     ISO Abbreviation:  Water Sci. Technol.     Publication Date:  2007  
Date Detail:
Created Date:  2007-06-26     Completed Date:  2008-01-24     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9879497     Medline TA:  Water Sci Technol     Country:  England    
Other Details:
Languages:  eng     Pagination:  165-71     Citation Subset:  IM    
Affiliation:
Institute of Wastewater Management and Water Protection, University of Technology Hamburg Harburg, FSP 1-02, D-21071 Hamburg, Germany. marcela.medina@tuhh.de
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MeSH Terms
Descriptor/Qualifier:
Analysis of Variance
Bacteria / metabolism*
Biomass
Bioreactors*
Chlorella vulgaris / growth & development,  metabolism*
Flocculation
Food
Nitrogen / metabolism
Sewage / microbiology
Symbiosis*
Waste Disposal, Fluid / methods*
Water Purification / methods*
Chemical
Reg. No./Substance:
0/Sewage; 7727-37-9/Nitrogen

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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