Document Detail


Solubilization of waste activated sludge by alkaline pretreatment and biochemical methane potential (BMP) tests for anaerobic co-digestion of municipal organic waste.
MedLine Citation:
PMID:  14682589     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Biochemical methane potential (BMP) tests have been carried out to determine the anaerobic digestibility of the waste activated sludge (WAS) and the sludge pretreated by NaOH (PWAS). The optimal NaOH dosage was determined to be 45 meq NaOH/L. The maximum SCOD solubilization was 27.7, 31.4 and 38.3% at the temperatures of 25, 35 and 55 degrees C respectively after 4 hours reaction. The final methane yield of simulated food waste (SFW) was 430 ml CH4/g VS(added), and those of PWAS (25 degrees C), PWAS (35 degrees C) and PWAS (55 degrees C) was 274, 286 and 310 ml CH4/g VS(added) respectively after 20 days. The figures were 66%, 73% and 88% higher than that of WAS. The methane production in anaerobic co-digestion is considerably affected by the fraction of SFW and PWAS in the feed. The anaerobic digestibility of the feed mixture (SFW with PWAS) is higher than that of the feed mixture (SFW with WAS). Anaerobic co-digestion of food waste with the PWAS is found to be an attractive option to reduce the solid waste volume with improved methane recovery.
Authors:
N H Heo; S C Park; J S Lee; H Kang
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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:  48     ISSN:  0273-1223     ISO Abbreviation:  Water Sci. Technol.     Publication Date:  2003  
Date Detail:
Created Date:  2003-12-19     Completed Date:  2004-03-16     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9879497     Medline TA:  Water Sci Technol     Country:  England    
Other Details:
Languages:  eng     Pagination:  211-9     Citation Subset:  IM    
Affiliation:
Biomass Research Team, Korea Institute of Energy Research, 71-2 Jangdong, Yusongku, Daejon 305-343, Korea. bionhheo@kier.re.kr
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MeSH Terms
Descriptor/Qualifier:
Bacteria, Anaerobic
Bioreactors
Food Industry
Hydrogen-Ion Concentration
Industrial Waste
Methane / analysis*
Sewage / chemistry*,  microbiology*
Solubility
Waste Disposal, Fluid / methods*
Chemical
Reg. No./Substance:
0/Industrial Waste; 0/Sewage; 74-82-8/Methane

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


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