Integration of continuous biological and chemical (ozone) treatment of domestic wastewater: 1. Biodegradation and post‐ozonation
Identifieur interne : 000258 ( Istex/Corpus ); précédent : 000257; suivant : 000259Integration of continuous biological and chemical (ozone) treatment of domestic wastewater: 1. Biodegradation and post‐ozonation
Auteurs : Fernando J. Beltrán ; Juan F. García Raya ; Pedro M. ÁlvarezSource :
- Journal of Chemical Technology & Biotechnology [ 0268-2575 ] ; 1999-09.
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Abstract
The continuous treatment of domestic wastewater by an activated sludge process and by an integrated biological–chemical (ozone) oxidation process were studied in this work. Chemical oxygen demand (COD), biochemical oxygen demand (BOD), absorbance at 254 nm (UV254) and nitrogenous compound content were the parameters followed in order to evaluate the performance of the two processes. Experimental data showed that both UV254 and COD reductions are improved in the combined biological–chemical oxidation procedure. Thus, reductions of 59.1% and 37.2% corresponding to COD and UV254, respectively were observed after the biological process (hydraulic retention time = 5 h; mixed liquor volatile suspended solids concentration = 3142 g m−3) compared with 71.0% and 78.4% obtained when a post‐ozonation step (D O3 = 41.7 g m−3) was included. During conventional activated sludge treatment, appropriate nitrification levels are only achieved with high hydraulic retention time and/or biomass concentration. Ozonation after the secondary treatment, however, allows improved nitrogen content reduction with total nitrite elimination. Post‐ozonation also leads to a higher biodegradability of the treated wastewater. Thus, the ultimate BOD/COD ratio goes from 0.16 after biological oxidation to 0.34 after post‐ozonation with 41.7 g O3 m−3. © 1999 Society of Chemical Industry
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DOI: 10.1002/(SICI)1097-4660(199909)74:9<877::AID-JCTB117>3.0.CO;2-2
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ISTEX:7E967ECC4C647C1205E3C7A7B0571E09321AD5A3Le document en format XML
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Biotechnol.</title><idno type="ISSN">0268-2575</idno><idno type="eISSN">1097-4660</idno><imprint><publisher>John Wiley & Sons, Ltd.</publisher><pubPlace>Chichester, UK</pubPlace><date type="published" when="1999-09">1999-09</date><biblScope unit="volume">74</biblScope><biblScope unit="issue">9</biblScope><biblScope unit="page" from="877">877</biblScope><biblScope unit="page" to="883">883</biblScope></imprint><idno type="ISSN">0268-2575</idno></series><idno type="istex">7E967ECC4C647C1205E3C7A7B0571E09321AD5A3</idno><idno type="DOI">10.1002/(SICI)1097-4660(199909)74:9<877::AID-JCTB117>3.0.CO;2-2</idno><idno type="ArticleID">JCTB117</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0268-2575</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>activated sludge</term><term>domestic sewage</term><term>ozone</term><term>wastewater treatment</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The continuous treatment of domestic wastewater by an activated sludge process and by an integrated biological–chemical (ozone) oxidation process were studied in this work. Chemical oxygen demand (COD), biochemical oxygen demand (BOD), absorbance at 254 nm (UV254) and nitrogenous compound content were the parameters followed in order to evaluate the performance of the two processes. Experimental data showed that both UV254 and COD reductions are improved in the combined biological–chemical oxidation procedure. Thus, reductions of 59.1% and 37.2% corresponding to COD and UV254, respectively were observed after the biological process (hydraulic retention time = 5 h; mixed liquor volatile suspended solids concentration = 3142 g m−3) compared with 71.0% and 78.4% obtained when a post‐ozonation step (D O3 = 41.7 g m−3) was included. During conventional activated sludge treatment, appropriate nitrification levels are only achieved with high hydraulic retention time and/or biomass concentration. Ozonation after the secondary treatment, however, allows improved nitrogen content reduction with total nitrite elimination. Post‐ozonation also leads to a higher biodegradability of the treated wastewater. Thus, the ultimate BOD/COD ratio goes from 0.16 after biological oxidation to 0.34 after post‐ozonation with 41.7 g O3 m−3. © 1999 Society of Chemical Industry</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>Fernando J Beltrán</name><affiliations><json:string>Departmento de Ingeniería Química y Energética, Universidad de Extremadura, 06071 Badajoz, Spain</json:string></affiliations></json:item><json:item><name>Juan F García‐Araya</name><affiliations><json:string>Departmento de Ingeniería Química y Energética, Universidad de Extremadura, 06071 Badajoz, Spain</json:string></affiliations></json:item><json:item><name>Pedro M Álvarez</name><affiliations><json:string>Departmento de Ingeniería Química y Energética, Universidad de Extremadura, 06071 Badajoz, Spain</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>ozone</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>activated sludge</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>domestic sewage</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>wastewater treatment</value></json:item></subject><language><json:string>eng</json:string></language><abstract>The continuous treatment of domestic wastewater by an activated sludge process and by an integrated biological–chemical (ozone) oxidation process were studied in this work. Chemical oxygen demand (COD), biochemical oxygen demand (BOD), absorbance at 254 nm (UV254) and nitrogenous compound content were the parameters followed in order to evaluate the performance of the two processes. Experimental data showed that both UV254 and COD reductions are improved in the combined biological–chemical oxidation procedure. Thus, reductions of 59.1% and 37.2% corresponding to COD and UV254, respectively were observed after the biological process (hydraulic retention time = 5 h; mixed liquor volatile suspended solids concentration = 3142 g m−3) compared with 71.0% and 78.4% obtained when a post‐ozonation step (D O3 = 41.7 g m−3) was included. During conventional activated sludge treatment, appropriate nitrification levels are only achieved with high hydraulic retention time and/or biomass concentration. Ozonation after the secondary treatment, however, allows improved nitrogen content reduction with total nitrite elimination. Post‐ozonation also leads to a higher biodegradability of the treated wastewater. Thus, the ultimate BOD/COD ratio goes from 0.16 after biological oxidation to 0.34 after post‐ozonation with 41.7 g O3 m−3. © 1999 Society of Chemical Industry</abstract><qualityIndicators><score>5.876</score><pdfVersion>1.2</pdfVersion><pdfPageSize>595 x 842 pts (A4)</pdfPageSize><refBibsNative>true</refBibsNative><keywordCount>4</keywordCount><abstractCharCount>1370</abstractCharCount><pdfWordCount>3692</pdfWordCount><pdfCharCount>23928</pdfCharCount><pdfPageCount>7</pdfPageCount><abstractWordCount>182</abstractWordCount></qualityIndicators><title>Integration of continuous biological and chemical (ozone) treatment of domestic wastewater: 1. 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Chemical oxygen demand (COD), biochemical oxygen demand (BOD), absorbance at 254 nm (UV254) and nitrogenous compound content were the parameters followed in order to evaluate the performance of the two processes. Experimental data showed that both UV254 and COD reductions are improved in the combined biological–chemical oxidation procedure. Thus, reductions of 59.1% and 37.2% corresponding to COD and UV254, respectively were observed after the biological process (hydraulic retention time = 5 h; mixed liquor volatile suspended solids concentration = 3142 g m−3) compared with 71.0% and 78.4% obtained when a post‐ozonation step (D O3 = 41.7 g m−3) was included. During conventional activated sludge treatment, appropriate nitrification levels are only achieved with high hydraulic retention time and/or biomass concentration. Ozonation after the secondary treatment, however, allows improved nitrogen content reduction with total nitrite elimination. Post‐ozonation also leads to a higher biodegradability of the treated wastewater. 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Chemical oxygen demand (COD), biochemical oxygen demand (BOD), absorbance at 254 nm (UV<sub>254</sub>) and nitrogenous compound content were the parameters followed in order to evaluate the performance of the two processes. Experimental data showed that both UV<sub>254</sub> and COD reductions are improved in the combined biological–chemical oxidation procedure. Thus, reductions of 59.1% and 37.2% corresponding to COD and UV<sub>254</sub>, respectively were observed after the biological process (hydraulic retention time = 5 h; mixed liquor volatile suspended solids concentration = 3142 g m<sup>−3</sup>) compared with 71.0% and 78.4% obtained when a post‐ozonation step (<b><i>D</i></b><sub>O3</sub> = 41.7 g m<sup>−3</sup>) was included. During conventional activated sludge treatment, appropriate nitrification levels are only achieved with high hydraulic retention time and/or biomass concentration. Ozonation after the secondary treatment, however, allows improved nitrogen content reduction with total nitrite elimination. Post‐ozonation also leads to a higher biodegradability of the treated wastewater. Thus, the ultimate BOD/COD ratio goes from 0.16 after biological oxidation to 0.34 after post‐ozonation with 41.7 g O<sub>3</sub> m<sup>−3</sup>.</p><p>© 1999 Society of Chemical Industry</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Integration of continuous biological and chemical (ozone) treatment of domestic wastewater: 1. Biodegradation and post‐ozonation</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>Continuous biological–chemical treatment of wastewater</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Integration of continuous biological and chemical (ozone) treatment of domestic wastewater: 1. Biodegradation and post‐ozonation</title></titleInfo><name type="personal"><namePart type="given">Fernando J</namePart><namePart type="family">Beltrán</namePart><affiliation>Departmento de Ingeniería Química y Energética, Universidad de Extremadura, 06071 Badajoz, Spain</affiliation><description>Correspondence: Departmento de Ingeniería Química y Energética, Universidad de Extremadura, 06071 Badajoz, Spain===</description><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Juan F</namePart><namePart type="family">García‐Araya</namePart><affiliation>Departmento de Ingeniería Química y Energética, Universidad de Extremadura, 06071 Badajoz, Spain</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Pedro M</namePart><namePart type="family">Álvarez</namePart><affiliation>Departmento de Ingeniería Química y Energética, Universidad de Extremadura, 06071 Badajoz, Spain</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>John Wiley & Sons, Ltd.</publisher><place><placeTerm type="text">Chichester, UK</placeTerm></place><dateIssued encoding="w3cdtf">1999-09</dateIssued><dateCaptured encoding="w3cdtf">1998-02-12</dateCaptured><dateValid encoding="w3cdtf">1999-04-17</dateValid><copyrightDate encoding="w3cdtf">1999</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType><extent unit="figures">5</extent><extent unit="tables">3</extent><extent unit="references">21</extent></physicalDescription><abstract lang="en">The continuous treatment of domestic wastewater by an activated sludge process and by an integrated biological–chemical (ozone) oxidation process were studied in this work. Chemical oxygen demand (COD), biochemical oxygen demand (BOD), absorbance at 254 nm (UV254) and nitrogenous compound content were the parameters followed in order to evaluate the performance of the two processes. Experimental data showed that both UV254 and COD reductions are improved in the combined biological–chemical oxidation procedure. Thus, reductions of 59.1% and 37.2% corresponding to COD and UV254, respectively were observed after the biological process (hydraulic retention time = 5 h; mixed liquor volatile suspended solids concentration = 3142 g m−3) compared with 71.0% and 78.4% obtained when a post‐ozonation step (D O3 = 41.7 g m−3) was included. During conventional activated sludge treatment, appropriate nitrification levels are only achieved with high hydraulic retention time and/or biomass concentration. Ozonation after the secondary treatment, however, allows improved nitrogen content reduction with total nitrite elimination. Post‐ozonation also leads to a higher biodegradability of the treated wastewater. Thus, the ultimate BOD/COD ratio goes from 0.16 after biological oxidation to 0.34 after post‐ozonation with 41.7 g O3 m−3. © 1999 Society of Chemical Industry</abstract><note type="funding">CICYT of Spain - No. AMB97/0339; </note><subject lang="en"><genre>Keywords</genre><topic>ozone</topic><topic>activated sludge</topic><topic>domestic sewage</topic><topic>wastewater treatment</topic></subject><relatedItem type="host"><titleInfo><title>Journal of Chemical Technology & Biotechnology</title><subTitle>International Research in Process, Environmental & Clean Technology</subTitle></titleInfo><titleInfo type="abbreviated"><title>J. Chem. Technol. Biotechnol.</title></titleInfo><genre type="Journal">journal</genre><subject><genre>article category</genre><topic>Paper</topic></subject><identifier type="ISSN">0268-2575</identifier><identifier type="eISSN">1097-4660</identifier><identifier type="DOI">10.1002/(ISSN)1097-4660</identifier><identifier type="PublisherID">JCTB</identifier><part><date>1999</date><detail type="volume"><caption>vol.</caption><number>74</number></detail><detail type="issue"><caption>no.</caption><number>9</number></detail><extent unit="pages"><start>877</start><end>883</end><total>7</total></extent></part></relatedItem><identifier type="istex">7E967ECC4C647C1205E3C7A7B0571E09321AD5A3</identifier><identifier type="DOI">10.1002/(SICI)1097-4660(199909)74:9<877::AID-JCTB117>3.0.CO;2-2</identifier><identifier type="ArticleID">JCTB117</identifier><accessCondition type="use and reproduction" contentType="copyright">Copyright © 1999 Society of Chemical Industry</accessCondition><recordInfo><recordContentSource>WILEY</recordContentSource><recordOrigin>John Wiley & Sons, Ltd.</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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