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Biofilm control for plate heat exchangers using surface seawater from the open ocean for the OTEC power plant
At the proposed site for the Ocean Thermal Energy Conversion power plant on the east coast of India, biofilm formation and its control using intermittent chlorination in plate heat exchangers was studied prior to commissioning of the plant. Settlement of fouling larvae was not observed on the plates...
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Published in: | International biodeterioration & biodegradation 2004-01, Vol.53 (2), p.133-140 |
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container_title | International biodeterioration & biodegradation |
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creator | Sriyutha Murthy, P. Venkatesan, R. Nair, K.V.K. Ravindran, M. |
description | At the proposed site for the Ocean Thermal Energy Conversion power plant on the east coast of India, biofilm formation and its control using intermittent chlorination in plate heat exchangers was studied prior to commissioning of the plant. Settlement of fouling larvae was not observed on the plates, which may be attributed to the low density of larvae of fouling organisms in the open ocean (
65
km
from the coast). Significant reduction in biofilm thickness was observed after chlorination at a dosage of
1.2
ppm
residual. Microalgae were absent on untreated and chlorinated heat exchanger plates. Significant differences were also observed with respect to bacterial density and diversity between chlorinated and control surfaces. Total counts of viable bacteria in untreated controls increased with time. Relative to controls, a significant reduction in bacterial density in biofilms was observed upon chlorination. Sulphate reducing bacteria were absent in chlorinated biofilms, whereas their numbers increased with time in controls. Counts of heterotrophic bacteria in biofilms also showed an increase with time in controls and were significantly lower on chlorinated surfaces. Counts of slime formers, e.g.
Pseudomonas sp. and
Aeromonas sp., were low compared to total viable bacterial counts. |
doi_str_mv | 10.1016/j.ibiod.2003.11.003 |
format | article |
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65
km
from the coast). Significant reduction in biofilm thickness was observed after chlorination at a dosage of
1.2
ppm
residual. Microalgae were absent on untreated and chlorinated heat exchanger plates. Significant differences were also observed with respect to bacterial density and diversity between chlorinated and control surfaces. Total counts of viable bacteria in untreated controls increased with time. Relative to controls, a significant reduction in bacterial density in biofilms was observed upon chlorination. Sulphate reducing bacteria were absent in chlorinated biofilms, whereas their numbers increased with time in controls. Counts of heterotrophic bacteria in biofilms also showed an increase with time in controls and were significantly lower on chlorinated surfaces. Counts of slime formers, e.g.
Pseudomonas sp. and
Aeromonas sp., were low compared to total viable bacterial counts.</description><identifier>ISSN: 0964-8305</identifier><identifier>EISSN: 1879-0208</identifier><identifier>DOI: 10.1016/j.ibiod.2003.11.003</identifier><language>eng</language><publisher>Elsevier Ltd</publisher><subject>Aeromonas ; Biofilms ; Biofouling ; Intermittent chlorination ; Marine ; Plate heat exchanger ; Pseudomonas</subject><ispartof>International biodeterioration & biodegradation, 2004-01, Vol.53 (2), p.133-140</ispartof><rights>2003 Elsevier Science Ltd</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c369t-a31afc283fc2cfe16eaab71e800c5d1f96f82279ea9ef486be9610311388fee53</citedby><cites>FETCH-LOGICAL-c369t-a31afc283fc2cfe16eaab71e800c5d1f96f82279ea9ef486be9610311388fee53</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>315,786,790,27957,27958</link.rule.ids></links><search><creatorcontrib>Sriyutha Murthy, P.</creatorcontrib><creatorcontrib>Venkatesan, R.</creatorcontrib><creatorcontrib>Nair, K.V.K.</creatorcontrib><creatorcontrib>Ravindran, M.</creatorcontrib><title>Biofilm control for plate heat exchangers using surface seawater from the open ocean for the OTEC power plant</title><title>International biodeterioration & biodegradation</title><description>At the proposed site for the Ocean Thermal Energy Conversion power plant on the east coast of India, biofilm formation and its control using intermittent chlorination in plate heat exchangers was studied prior to commissioning of the plant. Settlement of fouling larvae was not observed on the plates, which may be attributed to the low density of larvae of fouling organisms in the open ocean (
65
km
from the coast). Significant reduction in biofilm thickness was observed after chlorination at a dosage of
1.2
ppm
residual. Microalgae were absent on untreated and chlorinated heat exchanger plates. Significant differences were also observed with respect to bacterial density and diversity between chlorinated and control surfaces. Total counts of viable bacteria in untreated controls increased with time. Relative to controls, a significant reduction in bacterial density in biofilms was observed upon chlorination. Sulphate reducing bacteria were absent in chlorinated biofilms, whereas their numbers increased with time in controls. Counts of heterotrophic bacteria in biofilms also showed an increase with time in controls and were significantly lower on chlorinated surfaces. Counts of slime formers, e.g.
Pseudomonas sp. and
Aeromonas sp., were low compared to total viable bacterial counts.</description><subject>Aeromonas</subject><subject>Biofilms</subject><subject>Biofouling</subject><subject>Intermittent chlorination</subject><subject>Marine</subject><subject>Plate heat exchanger</subject><subject>Pseudomonas</subject><issn>0964-8305</issn><issn>1879-0208</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2004</creationdate><recordtype>article</recordtype><recordid>eNp9kD9PwzAQxS0EEqXwCVg8sSX44ia1Bwao-CdV6lJmy3XOraskDnZC4duTtMws95NO7z3dPUJugaXAoLjfp27jfJlmjPEUIB1wRiYg5jJhGRPnZMJkMUsEZ_kluYpxzxiDXMCE1E_OW1fV1PimC76i1gfaVrpDukPdUfw2O91sMUTaR9dsaeyD1QZpRH0YVIHa4Gva7ZD6FhvqDermGDKuVuvnBW39AY-ZTXdNLqyuIt78cUo-Xp7Xi7dkuXp9XzwuE8ML2SWag7YmE3wYxiIUqPVmDigYM3kJVhZWZNlcopZoZ6LYoCyAcQAuhEXM-ZTcnXLb4D97jJ2qXTRYDTeg76MCKYAXYhTyk9AEH2NAq9rgah1-FDA1Vqv26litGqtVAGrA4Ho4uXD44cthUNE4bAyWLqDpVOndv_5ftqOEqQ</recordid><startdate>20040101</startdate><enddate>20040101</enddate><creator>Sriyutha Murthy, P.</creator><creator>Venkatesan, R.</creator><creator>Nair, K.V.K.</creator><creator>Ravindran, M.</creator><general>Elsevier Ltd</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7QL</scope><scope>7T7</scope><scope>7UA</scope><scope>8FD</scope><scope>C1K</scope><scope>F1W</scope><scope>FR3</scope><scope>H95</scope><scope>H96</scope><scope>H99</scope><scope>L.F</scope><scope>L.G</scope><scope>M7N</scope><scope>P64</scope></search><sort><creationdate>20040101</creationdate><title>Biofilm control for plate heat exchangers using surface seawater from the open ocean for the OTEC power plant</title><author>Sriyutha Murthy, P. ; Venkatesan, R. ; Nair, K.V.K. ; Ravindran, M.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c369t-a31afc283fc2cfe16eaab71e800c5d1f96f82279ea9ef486be9610311388fee53</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2004</creationdate><topic>Aeromonas</topic><topic>Biofilms</topic><topic>Biofouling</topic><topic>Intermittent chlorination</topic><topic>Marine</topic><topic>Plate heat exchanger</topic><topic>Pseudomonas</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Sriyutha Murthy, P.</creatorcontrib><creatorcontrib>Venkatesan, R.</creatorcontrib><creatorcontrib>Nair, K.V.K.</creatorcontrib><creatorcontrib>Ravindran, M.</creatorcontrib><collection>CrossRef</collection><collection>Bacteriology Abstracts (Microbiology B)</collection><collection>Industrial and Applied Microbiology Abstracts (Microbiology A)</collection><collection>Water Resources Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Engineering Research Database</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 1: Biological Sciences & Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>ASFA: Marine Biotechnology Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Marine Biotechnology Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Algology Mycology and Protozoology Abstracts (Microbiology C)</collection><collection>Biotechnology and BioEngineering Abstracts</collection><jtitle>International biodeterioration & biodegradation</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Sriyutha Murthy, P.</au><au>Venkatesan, R.</au><au>Nair, K.V.K.</au><au>Ravindran, M.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Biofilm control for plate heat exchangers using surface seawater from the open ocean for the OTEC power plant</atitle><jtitle>International biodeterioration & biodegradation</jtitle><date>2004-01-01</date><risdate>2004</risdate><volume>53</volume><issue>2</issue><spage>133</spage><epage>140</epage><pages>133-140</pages><issn>0964-8305</issn><eissn>1879-0208</eissn><notes>ObjectType-Article-1</notes><notes>SourceType-Scholarly Journals-1</notes><notes>ObjectType-Feature-2</notes><notes>content type line 23</notes><abstract>At the proposed site for the Ocean Thermal Energy Conversion power plant on the east coast of India, biofilm formation and its control using intermittent chlorination in plate heat exchangers was studied prior to commissioning of the plant. Settlement of fouling larvae was not observed on the plates, which may be attributed to the low density of larvae of fouling organisms in the open ocean (
65
km
from the coast). Significant reduction in biofilm thickness was observed after chlorination at a dosage of
1.2
ppm
residual. Microalgae were absent on untreated and chlorinated heat exchanger plates. Significant differences were also observed with respect to bacterial density and diversity between chlorinated and control surfaces. Total counts of viable bacteria in untreated controls increased with time. Relative to controls, a significant reduction in bacterial density in biofilms was observed upon chlorination. Sulphate reducing bacteria were absent in chlorinated biofilms, whereas their numbers increased with time in controls. Counts of heterotrophic bacteria in biofilms also showed an increase with time in controls and were significantly lower on chlorinated surfaces. Counts of slime formers, e.g.
Pseudomonas sp. and
Aeromonas sp., were low compared to total viable bacterial counts.</abstract><pub>Elsevier Ltd</pub><doi>10.1016/j.ibiod.2003.11.003</doi><tpages>8</tpages></addata></record> |
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subjects | Aeromonas Biofilms Biofouling Intermittent chlorination Marine Plate heat exchanger Pseudomonas |
title | Biofilm control for plate heat exchangers using surface seawater from the open ocean for the OTEC power plant |
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