Document Detail


MIC mitigation in a 100 MW district heating peak load unit.
MedLine Citation:
PMID:  14982169     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
During inspection of AISI316 stainless steel plate heat exchangers in a district heating peak load unit, localised corrosion attacks along with indications of microbiological activity were found on the boiler side beneath patches of sturdy black deposits. Bacteria and sulphide were detected within black deposits. Thorough investigation of the boiler system revealed several incidents of localised corrosion on low alloy steel along with deposits of organic matter and bacteria primarily in places with stagnant water or places operating at a low flow rate. A relatively large amount of bacteria was detected within the system, primarily in deposits and around corrosion sites. The observations suggested the combination of deposits and bacterial activity, being the major reason for the observed corrosion. Prior to the investigation, the boiler system had operated with cat-/anion-exchanged, de-aerated water for 3 years, during which the water fulfilled strict chemical limits set to minimise corrosion. Based on these findings, the system has been modified in order to minimise the risk of microbiologically influenced corrosion and a monitoring program for fouling and corrosion has been established.
Authors:
B H Olesen; J Lorenzen; B V Kjellerup; S Odum; P H Nielsen; B Frølund
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Publication Detail:
Type:  Journal Article    
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:  2004-02-25     Completed Date:  2004-05-19     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  9879497     Medline TA:  Water Sci Technol     Country:  England    
Other Details:
Languages:  eng     Pagination:  99-105     Citation Subset:  IM    
Affiliation:
Department of Environmental and Water Technology, Danish Technological Institute, Teknologiparken, DK-8000 Arhus, Denmark. Bo.Hojris@teknologisk.dk
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MeSH Terms
Descriptor/Qualifier:
Bacteria
Corrosion
Hot Temperature
Materials Testing
Risk Assessment
Steel*
Water Microbiology
Water Supply*
Chemical
Reg. No./Substance:
12597-69-2/Steel

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


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