Role of exopolymeric protein on the settleability of nitrifying sludges
The relationship of exopolymeric substances and the sludge volume indexes (SVI) of two nitrifying sludge were studied over a period of time (30 d) in two different types of reactors: (1) a stirred tank aerated nitrifying reactor (SANR) and (2) an air-lift nitrifying reactor (ALNR). Concentrations of...
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| Veröffentlicht in: | Bioresource technology 2004-08, Vol.94 (1), p.43-48 |
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| creator | Martı́nez O, Felipe Lema, Juan Méndez, Ramón Cuervo-López, Flor Gómez, Jorge |
| description | The relationship of exopolymeric substances and the sludge volume indexes (SVI) of two nitrifying sludge were studied over a period of time (30 d) in two different types of reactors: (1) a stirred tank aerated nitrifying reactor (SANR) and (2) an air-lift nitrifying reactor (ALNR). Concentrations of lipids, carbohydrates and proteins of the EPS were determined in both reactors. The variation in lipids and carbohydrates was low ( |
| doi_str_mv | 10.1016/j.biortech.2003.11.010 |
| format | Article |
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Concentrations of lipids, carbohydrates and proteins of the EPS were determined in both reactors. The variation in lipids and carbohydrates was low (<10%), while the variation in the exopolymeric protein was higher. The SVI increased in accordance with the increase in the concentration of the exopolymeric protein. The number of bands of the exopolymeric protein was modified as a consequence of the change in the concentration of the exopolymeric protein. The molecular weights of the exopolymeric protein ranged from 31 to 97 in the stirred and 13 to 45 kDa in the air-lift reactor. The variations in the SVI were mainly due to the changes in the molecular weight of the exopolymeric proteins resulting in the modification of the sludge settleability characteristics.</description><identifier>ISSN: 0960-8524</identifier><identifier>EISSN: 1873-2976</identifier><identifier>DOI: 10.1016/j.biortech.2003.11.010</identifier><identifier>PMID: 15081485</identifier><language>eng</language><publisher>Oxford: Elsevier Ltd</publisher><subject>Bacteria - metabolism ; Biodegradation, Environmental ; Biological and medical sciences ; Biopolymers - analysis ; Bioreactors ; Electrophoresis, Polyacrylamide Gel ; Exopolymeric protein ; Flocculation ; Fundamental and applied biological sciences. 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Concentrations of lipids, carbohydrates and proteins of the EPS were determined in both reactors. The variation in lipids and carbohydrates was low (<10%), while the variation in the exopolymeric protein was higher. The SVI increased in accordance with the increase in the concentration of the exopolymeric protein. The number of bands of the exopolymeric protein was modified as a consequence of the change in the concentration of the exopolymeric protein. The molecular weights of the exopolymeric protein ranged from 31 to 97 in the stirred and 13 to 45 kDa in the air-lift reactor. The variations in the SVI were mainly due to the changes in the molecular weight of the exopolymeric proteins resulting in the modification of the sludge settleability characteristics.</description><subject>Bacteria - metabolism</subject><subject>Biodegradation, Environmental</subject><subject>Biological and medical sciences</subject><subject>Biopolymers - analysis</subject><subject>Bioreactors</subject><subject>Electrophoresis, Polyacrylamide Gel</subject><subject>Exopolymeric protein</subject><subject>Flocculation</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Molecular weight</subject><subject>Nitrifying sludge</subject><subject>Proteins - analysis</subject><subject>Sewage - chemistry</subject><subject>Sewage - microbiology</subject><subject>Sludge volume index</subject><subject>Time Factors</subject><subject>Waste Disposal, Fluid - methods</subject><issn>0960-8524</issn><issn>1873-2976</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2004</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkE1LJDEURYMo2qP-BanNuKsyH5VUsptB1BkQBNF1qE5eNE260iZpmf73pumWcefqbs5973IQuiC4I5iIq0U39zEVMK8dxZh1hHSY4AM0I3JgLVWDOEQzrARuJaf9CfqR8wJXkAz0GJ0QjiXpJZ-hu8cYoImugX9xFcNmCcmbZpViAT81cWrKKzQZSgkwzn3wZbOFJ1-Sdxs_vTQ5rO0L5DN05MaQ4Xyfp-j59ubp-k97_3D39_r3fWt6RUpLpXSyZ2LgbuTzOkLJmr3FRlDOrDVsEBgw7Q0Hwx11tOfWMgZCKXCEsVN0ubtbJ76tIRe99NlACOMEcZ01xVL0nKsKih1oUsw5gdOr5Jdj2miC9VahXuhPhXqrUBOiq8JavNh_WM-XYP_X9s4q8HMPjNmMwaVxMj5_4YZBDWo79deOg-rj3UPS2XiYDFifwBRto_9uywfUzpLu</recordid><startdate>20040801</startdate><enddate>20040801</enddate><creator>Martı́nez O, Felipe</creator><creator>Lema, Juan</creator><creator>Méndez, Ramón</creator><creator>Cuervo-López, Flor</creator><creator>Gómez, Jorge</creator><general>Elsevier Ltd</general><general>Elsevier Science</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QO</scope><scope>8FD</scope><scope>FR3</scope><scope>P64</scope></search><sort><creationdate>20040801</creationdate><title>Role of exopolymeric protein on the settleability of nitrifying sludges</title><author>Martı́nez O, Felipe ; Lema, Juan ; Méndez, Ramón ; Cuervo-López, Flor ; Gómez, Jorge</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c491t-288f843675fa5b08198a5b4d0c6253ddc3760e024c5ec5f2f245dd33e699ef133</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2004</creationdate><topic>Bacteria - metabolism</topic><topic>Biodegradation, Environmental</topic><topic>Biological and medical sciences</topic><topic>Biopolymers - analysis</topic><topic>Bioreactors</topic><topic>Electrophoresis, Polyacrylamide Gel</topic><topic>Exopolymeric protein</topic><topic>Flocculation</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Molecular weight</topic><topic>Nitrifying sludge</topic><topic>Proteins - analysis</topic><topic>Sewage - chemistry</topic><topic>Sewage - microbiology</topic><topic>Sludge volume index</topic><topic>Time Factors</topic><topic>Waste Disposal, Fluid - methods</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Martı́nez O, Felipe</creatorcontrib><creatorcontrib>Lema, Juan</creatorcontrib><creatorcontrib>Méndez, Ramón</creatorcontrib><creatorcontrib>Cuervo-López, Flor</creatorcontrib><creatorcontrib>Gómez, Jorge</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Biotechnology Research Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Biotechnology and BioEngineering Abstracts</collection><jtitle>Bioresource technology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Martı́nez O, Felipe</au><au>Lema, Juan</au><au>Méndez, Ramón</au><au>Cuervo-López, Flor</au><au>Gómez, Jorge</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Role of exopolymeric protein on the settleability of nitrifying sludges</atitle><jtitle>Bioresource technology</jtitle><addtitle>Bioresour Technol</addtitle><date>2004-08-01</date><risdate>2004</risdate><volume>94</volume><issue>1</issue><spage>43</spage><epage>48</epage><pages>43-48</pages><issn>0960-8524</issn><eissn>1873-2976</eissn><abstract>The relationship of exopolymeric substances and the sludge volume indexes (SVI) of two nitrifying sludge were studied over a period of time (30 d) in two different types of reactors: (1) a stirred tank aerated nitrifying reactor (SANR) and (2) an air-lift nitrifying reactor (ALNR). Concentrations of lipids, carbohydrates and proteins of the EPS were determined in both reactors. The variation in lipids and carbohydrates was low (<10%), while the variation in the exopolymeric protein was higher. The SVI increased in accordance with the increase in the concentration of the exopolymeric protein. The number of bands of the exopolymeric protein was modified as a consequence of the change in the concentration of the exopolymeric protein. The molecular weights of the exopolymeric protein ranged from 31 to 97 in the stirred and 13 to 45 kDa in the air-lift reactor. The variations in the SVI were mainly due to the changes in the molecular weight of the exopolymeric proteins resulting in the modification of the sludge settleability characteristics.</abstract><cop>Oxford</cop><pub>Elsevier Ltd</pub><pmid>15081485</pmid><doi>10.1016/j.biortech.2003.11.010</doi><tpages>6</tpages></addata></record> |
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| subjects | Bacteria - metabolism Biodegradation, Environmental Biological and medical sciences Biopolymers - analysis Bioreactors Electrophoresis, Polyacrylamide Gel Exopolymeric protein Flocculation Fundamental and applied biological sciences. Psychology Molecular weight Nitrifying sludge Proteins - analysis Sewage - chemistry Sewage - microbiology Sludge volume index Time Factors Waste Disposal, Fluid - methods |
| title | Role of exopolymeric protein on the settleability of nitrifying sludges |
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