Denitrification in presence of benzene, toluene, and m-xylene: kinetics, mass balance, and yields
Denitrification of the electron donors toluene-C (15-100 mg/L), m-xylene-C (15-70 mg/L), benzene-C (5-25 mg/L), and acetate-C as experimental reference (50-140 mg/L) was carried out in batch culture. An initial concentration of 1.1 +/- 0.15 g of volatile suspended solids/L of denitrifying sludge wit...
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| Veröffentlicht in: | Applied biochemistry and biotechnology 2004-12, Vol.119 (3), p.195-208 |
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| creator | Peña-Calva, A Olmos-Dichara, A Viniegra-González, G Cuervo-López, F M Gómez, J |
| description | Denitrification of the electron donors toluene-C (15-100 mg/L), m-xylene-C (15-70 mg/L), benzene-C (5-25 mg/L), and acetate-C as experimental reference (50-140 mg/L) was carried out in batch culture. An initial concentration of 1.1 +/- 0.15 g of volatile suspended solids/L of denitrifying sludge without previous exposure to aromatic compounds was used as inoculum. The results showed toluene and nitrate consumption efficiency (ET and EN, respectively) of 100%. Toluene was completely mineralized (oxidized) to CO2. In all cases, the N2 (YN2) and HCO3-yields (YHCO3) were 0.97 +/- 0.01 and 0.8 +/- 0.05, respectively. The consumption efficiency (EX) of m-xylene (53 +/- 5.7%) was partial. The YN2 and YHCO3 were 0.96 +/- 0.01 and 0.86 +/- 0.02, respectively. Benzene was not consumed under denitrifying conditions. The specific consumption rates of toluene (qT) and m-xylene (qX) were lower than that of acetate (qA). The differences in specific consumption rates were probably owing to the negative effect of benzene, toluene, and isomers of xylene on the cell membrane. |
| doi_str_mv | 10.1007/s12010-004-0002-0 |
| format | Article |
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An initial concentration of 1.1 +/- 0.15 g of volatile suspended solids/L of denitrifying sludge without previous exposure to aromatic compounds was used as inoculum. The results showed toluene and nitrate consumption efficiency (ET and EN, respectively) of 100%. Toluene was completely mineralized (oxidized) to CO2. In all cases, the N2 (YN2) and HCO3-yields (YHCO3) were 0.97 +/- 0.01 and 0.8 +/- 0.05, respectively. The consumption efficiency (EX) of m-xylene (53 +/- 5.7%) was partial. The YN2 and YHCO3 were 0.96 +/- 0.01 and 0.86 +/- 0.02, respectively. Benzene was not consumed under denitrifying conditions. The specific consumption rates of toluene (qT) and m-xylene (qX) were lower than that of acetate (qA). The differences in specific consumption rates were probably owing to the negative effect of benzene, toluene, and isomers of xylene on the cell membrane.</description><identifier>ISSN: 0273-2289</identifier><identifier>EISSN: 1559-0291</identifier><identifier>DOI: 10.1007/s12010-004-0002-0</identifier><identifier>PMID: 15591614</identifier><language>eng</language><publisher>United States: Springer Nature B.V</publisher><subject>Acetates - metabolism ; Adsorption ; Aromatic compounds ; Bacteria ; Benzene ; Benzene - analysis ; Benzene - metabolism ; Bicarbonates - metabolism ; Biochemistry ; Biodegradation, Environmental ; Bioreactors ; Denitrification ; Hydrocarbons ; Nitrates - metabolism ; Nitrogen - metabolism ; Oxidation-Reduction ; Sewage - chemistry ; Sewage - microbiology ; Sludge ; Studies ; Suspended solids ; Time Factors ; Toluene ; Toluene - analysis ; Toluene - chemistry ; Toluene - metabolism ; Volatilization ; Xylene ; Xylenes - analysis ; Xylenes - chemistry ; Xylenes - metabolism</subject><ispartof>Applied biochemistry and biotechnology, 2004-12, Vol.119 (3), p.195-208</ispartof><rights>Humana Press Inc. 2004</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c341t-284755feb3fcc44e43300d2aeca68bd917a2d2efe45fd16dbad18fe51600d6203</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27915,27916</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/15591614$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Peña-Calva, A</creatorcontrib><creatorcontrib>Olmos-Dichara, A</creatorcontrib><creatorcontrib>Viniegra-González, G</creatorcontrib><creatorcontrib>Cuervo-López, F M</creatorcontrib><creatorcontrib>Gómez, J</creatorcontrib><title>Denitrification in presence of benzene, toluene, and m-xylene: kinetics, mass balance, and yields</title><title>Applied biochemistry and biotechnology</title><addtitle>Appl Biochem Biotechnol</addtitle><description>Denitrification of the electron donors toluene-C (15-100 mg/L), m-xylene-C (15-70 mg/L), benzene-C (5-25 mg/L), and acetate-C as experimental reference (50-140 mg/L) was carried out in batch culture. An initial concentration of 1.1 +/- 0.15 g of volatile suspended solids/L of denitrifying sludge without previous exposure to aromatic compounds was used as inoculum. The results showed toluene and nitrate consumption efficiency (ET and EN, respectively) of 100%. Toluene was completely mineralized (oxidized) to CO2. In all cases, the N2 (YN2) and HCO3-yields (YHCO3) were 0.97 +/- 0.01 and 0.8 +/- 0.05, respectively. The consumption efficiency (EX) of m-xylene (53 +/- 5.7%) was partial. The YN2 and YHCO3 were 0.96 +/- 0.01 and 0.86 +/- 0.02, respectively. Benzene was not consumed under denitrifying conditions. The specific consumption rates of toluene (qT) and m-xylene (qX) were lower than that of acetate (qA). The differences in specific consumption rates were probably owing to the negative effect of benzene, toluene, and isomers of xylene on the cell membrane.</description><subject>Acetates - metabolism</subject><subject>Adsorption</subject><subject>Aromatic compounds</subject><subject>Bacteria</subject><subject>Benzene</subject><subject>Benzene - analysis</subject><subject>Benzene - metabolism</subject><subject>Bicarbonates - metabolism</subject><subject>Biochemistry</subject><subject>Biodegradation, Environmental</subject><subject>Bioreactors</subject><subject>Denitrification</subject><subject>Hydrocarbons</subject><subject>Nitrates - metabolism</subject><subject>Nitrogen - metabolism</subject><subject>Oxidation-Reduction</subject><subject>Sewage - chemistry</subject><subject>Sewage - microbiology</subject><subject>Sludge</subject><subject>Studies</subject><subject>Suspended solids</subject><subject>Time Factors</subject><subject>Toluene</subject><subject>Toluene - analysis</subject><subject>Toluene - chemistry</subject><subject>Toluene - metabolism</subject><subject>Volatilization</subject><subject>Xylene</subject><subject>Xylenes - analysis</subject><subject>Xylenes - chemistry</subject><subject>Xylenes - 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mass balance, and yields</atitle><jtitle>Applied biochemistry and biotechnology</jtitle><addtitle>Appl Biochem Biotechnol</addtitle><date>2004-12-01</date><risdate>2004</risdate><volume>119</volume><issue>3</issue><spage>195</spage><epage>208</epage><pages>195-208</pages><issn>0273-2289</issn><eissn>1559-0291</eissn><abstract>Denitrification of the electron donors toluene-C (15-100 mg/L), m-xylene-C (15-70 mg/L), benzene-C (5-25 mg/L), and acetate-C as experimental reference (50-140 mg/L) was carried out in batch culture. An initial concentration of 1.1 +/- 0.15 g of volatile suspended solids/L of denitrifying sludge without previous exposure to aromatic compounds was used as inoculum. The results showed toluene and nitrate consumption efficiency (ET and EN, respectively) of 100%. Toluene was completely mineralized (oxidized) to CO2. In all cases, the N2 (YN2) and HCO3-yields (YHCO3) were 0.97 +/- 0.01 and 0.8 +/- 0.05, respectively. The consumption efficiency (EX) of m-xylene (53 +/- 5.7%) was partial. The YN2 and YHCO3 were 0.96 +/- 0.01 and 0.86 +/- 0.02, respectively. Benzene was not consumed under denitrifying conditions. The specific consumption rates of toluene (qT) and m-xylene (qX) were lower than that of acetate (qA). The differences in specific consumption rates were probably owing to the negative effect of benzene, toluene, and isomers of xylene on the cell membrane.</abstract><cop>United States</cop><pub>Springer Nature B.V</pub><pmid>15591614</pmid><doi>10.1007/s12010-004-0002-0</doi><tpages>14</tpages></addata></record> |
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| subjects | Acetates - metabolism Adsorption Aromatic compounds Bacteria Benzene Benzene - analysis Benzene - metabolism Bicarbonates - metabolism Biochemistry Biodegradation, Environmental Bioreactors Denitrification Hydrocarbons Nitrates - metabolism Nitrogen - metabolism Oxidation-Reduction Sewage - chemistry Sewage - microbiology Sludge Studies Suspended solids Time Factors Toluene Toluene - analysis Toluene - chemistry Toluene - metabolism Volatilization Xylene Xylenes - analysis Xylenes - chemistry Xylenes - metabolism |
| title | Denitrification in presence of benzene, toluene, and m-xylene: kinetics, mass balance, and yields |
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