Operating conditions for the continuous bioremediation of free cyanide contaminated wastewater using Aspergillus awamori.
Identifieur interne : 000403 ( PubMed/Corpus ); précédent : 000402; suivant : 000404Operating conditions for the continuous bioremediation of free cyanide contaminated wastewater using Aspergillus awamori.
Auteurs : B A Q. Santos ; S K O. Ntwampe ; J H Doughari ; G. MuchatibayaSource :
- Water science and technology : a journal of the International Association on Water Pollution Research [ 0273-1223 ] ; 2014.
English descriptors
- KwdEn :
- MESH :
- chemical , chemistry : Cyanides, Waste Water, Water Pollutants, Chemical.
- chemistry : Aspergillus.
- Biodegradation, Environmental, Feasibility Studies, Hydrogen-Ion Concentration, Temperature, Water Purification.
Abstract
Generation of cyanide-containing wastewater is a growing problem worldwide as numerous cyanide complexes are highly unstable and degrade to form free cyanide (F-CN), the most toxic form of cyanide. Agro-waste materials, such as sweet orange (Citrus sinensis) waste from the citrus industry, are rich in readily metabolisable carbohydrates that can supplement microbial activity and thus support biodegradation of toxic compounds in wastewater. This study reports on optimal operating conditions for the continuous biodegradation of F-CN in wastewater using an Aspergillus awamori isolate in a process supported solely using C. sinensis waste extract. The optimal degradation conditions were pH 8.75 and 37.02 °C with the isolate's F-CN tolerance being observed up to 430 mg F-CN/L. Furthermore, the ammonium produced as a by-product of F-CN degradation was also metabolised by the A. awamori, with negligible residual citric acid and formate being observed in the effluent post treatment. This study demonstrates the feasibility of using agricultural waste as a primary and sole carbon source for the cultivation of a cyanide-degrading A. awamori species for F-CN degradation under alkaline conditions.
DOI: 10.2166/wst.2013.813
PubMed: 24622547
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Ntwampe</name><affiliation><nlm:affiliation>Faculty of Applied Sciences, Department of Agriculture and Food Sciences: Biotechnology, Cape Peninsula University of Technology, Cape Town, South Africa E-mail: ntwampes@cput.ac.za.</nlm:affiliation></affiliation></author><author><name sortKey="Doughari, J H" sort="Doughari, J H" uniqKey="Doughari J" first="J H" last="Doughari">J H Doughari</name><affiliation><nlm:affiliation>Faculty of Applied Sciences, Department of Agriculture and Food Sciences: Biotechnology, Cape Peninsula University of Technology, Cape Town, South Africa E-mail: ntwampes@cput.ac.za.</nlm:affiliation></affiliation></author><author><name sortKey="Muchatibaya, G" sort="Muchatibaya, G" uniqKey="Muchatibaya G" first="G" last="Muchatibaya">G. 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Ntwampe</name><affiliation><nlm:affiliation>Faculty of Applied Sciences, Department of Agriculture and Food Sciences: Biotechnology, Cape Peninsula University of Technology, Cape Town, South Africa E-mail: ntwampes@cput.ac.za.</nlm:affiliation></affiliation></author><author><name sortKey="Doughari, J H" sort="Doughari, J H" uniqKey="Doughari J" first="J H" last="Doughari">J H Doughari</name><affiliation><nlm:affiliation>Faculty of Applied Sciences, Department of Agriculture and Food Sciences: Biotechnology, Cape Peninsula University of Technology, Cape Town, South Africa E-mail: ntwampes@cput.ac.za.</nlm:affiliation></affiliation></author><author><name sortKey="Muchatibaya, G" sort="Muchatibaya, G" uniqKey="Muchatibaya G" first="G" last="Muchatibaya">G. Muchatibaya</name><affiliation><nlm:affiliation>Faculty of Applied Sciences, Department of Agriculture and Food Sciences: Biotechnology, Cape Peninsula University of Technology, Cape Town, South Africa E-mail: ntwampes@cput.ac.za.</nlm:affiliation></affiliation></author></analytic><series><title level="j">Water science and technology : a journal of the International Association on Water Pollution Research</title><idno type="ISSN">0273-1223</idno><imprint><date when="2014" type="published">2014</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Aspergillus (chemistry)</term><term>Biodegradation, Environmental</term><term>Cyanides (chemistry)</term><term>Feasibility Studies</term><term>Hydrogen-Ion Concentration</term><term>Temperature</term><term>Waste Water (chemistry)</term><term>Water Pollutants, Chemical (chemistry)</term><term>Water Purification</term></keywords><keywords scheme="MESH" type="chemical" qualifier="chemistry" xml:lang="en"><term>Cyanides</term><term>Waste Water</term><term>Water Pollutants, Chemical</term></keywords><keywords scheme="MESH" qualifier="chemistry" xml:lang="en"><term>Aspergillus</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Biodegradation, Environmental</term><term>Feasibility Studies</term><term>Hydrogen-Ion Concentration</term><term>Temperature</term><term>Water Purification</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Generation of cyanide-containing wastewater is a growing problem worldwide as numerous cyanide complexes are highly unstable and degrade to form free cyanide (F-CN), the most toxic form of cyanide. Agro-waste materials, such as sweet orange (Citrus sinensis) waste from the citrus industry, are rich in readily metabolisable carbohydrates that can supplement microbial activity and thus support biodegradation of toxic compounds in wastewater. This study reports on optimal operating conditions for the continuous biodegradation of F-CN in wastewater using an Aspergillus awamori isolate in a process supported solely using C. sinensis waste extract. The optimal degradation conditions were pH 8.75 and 37.02 °C with the isolate's F-CN tolerance being observed up to 430 mg F-CN/L. Furthermore, the ammonium produced as a by-product of F-CN degradation was also metabolised by the A. awamori, with negligible residual citric acid and formate being observed in the effluent post treatment. This study demonstrates the feasibility of using agricultural waste as a primary and sole carbon source for the cultivation of a cyanide-degrading A. awamori species for F-CN degradation under alkaline conditions.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">24622547</PMID><DateCreated><Year>2014</Year><Month>3</Month><Day>13</Day></DateCreated><DateCompleted><Year>2014</Year><Month>05</Month><Day>30</Day></DateCompleted><DateRevised><Year>2014</Year><Month>3</Month><Day>13</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">0273-1223</ISSN><JournalIssue CitedMedium="Print"><Volume>69</Volume><Issue>5</Issue><PubDate><Year>2014</Year></PubDate></JournalIssue><Title>Water science and technology : a journal of the International Association on Water Pollution Research</Title><ISOAbbreviation>Water Sci. Technol.</ISOAbbreviation></Journal><ArticleTitle>Operating conditions for the continuous bioremediation of free cyanide contaminated wastewater using Aspergillus awamori.</ArticleTitle><Pagination><MedlinePgn>989-93</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.2166/wst.2013.813</ELocationID><Abstract><AbstractText>Generation of cyanide-containing wastewater is a growing problem worldwide as numerous cyanide complexes are highly unstable and degrade to form free cyanide (F-CN), the most toxic form of cyanide. Agro-waste materials, such as sweet orange (Citrus sinensis) waste from the citrus industry, are rich in readily metabolisable carbohydrates that can supplement microbial activity and thus support biodegradation of toxic compounds in wastewater. This study reports on optimal operating conditions for the continuous biodegradation of F-CN in wastewater using an Aspergillus awamori isolate in a process supported solely using C. sinensis waste extract. The optimal degradation conditions were pH 8.75 and 37.02 °C with the isolate's F-CN tolerance being observed up to 430 mg F-CN/L. Furthermore, the ammonium produced as a by-product of F-CN degradation was also metabolised by the A. awamori, with negligible residual citric acid and formate being observed in the effluent post treatment. This study demonstrates the feasibility of using agricultural waste as a primary and sole carbon source for the cultivation of a cyanide-degrading A. awamori species for F-CN degradation under alkaline conditions.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Santos</LastName><ForeName>B A Q</ForeName><Initials>BA</Initials><AffiliationInfo><Affiliation>Faculty of Applied Sciences, Department of Agriculture and Food Sciences: Biotechnology, Cape Peninsula University of Technology, Cape Town, South Africa E-mail: ntwampes@cput.ac.za.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Ntwampe</LastName><ForeName>S K O</ForeName><Initials>SK</Initials><AffiliationInfo><Affiliation>Faculty of Applied Sciences, Department of Agriculture and Food Sciences: Biotechnology, Cape Peninsula University of Technology, Cape Town, South Africa E-mail: ntwampes@cput.ac.za.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Doughari</LastName><ForeName>J H</ForeName><Initials>JH</Initials><AffiliationInfo><Affiliation>Faculty of Applied Sciences, Department of Agriculture and Food Sciences: Biotechnology, Cape Peninsula University of Technology, Cape Town, South Africa E-mail: ntwampes@cput.ac.za.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Muchatibaya</LastName><ForeName>G</ForeName><Initials>G</Initials><AffiliationInfo><Affiliation>Faculty of Applied Sciences, Department of Agriculture and Food Sciences: Biotechnology, Cape Peninsula University of Technology, Cape Town, South Africa E-mail: ntwampes@cput.ac.za.</Affiliation></AffiliationInfo></Author></AuthorList><Language>ENG</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType></PublicationTypeList></Article><MedlineJournalInfo><Country>England</Country><MedlineTA>Water Sci Technol</MedlineTA><NlmUniqueID>9879497</NlmUniqueID><ISSNLinking>0273-1223</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D003486">Cyanides</NameOfSubstance></Chemical><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D062065">Waste Water</NameOfSubstance></Chemical><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D014874">Water Pollutants, Chemical</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D001230" MajorTopicYN="N">Aspergillus</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="Y">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D001673" MajorTopicYN="N">Biodegradation, Environmental</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D003486" MajorTopicYN="N">Cyanides</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="Y">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D005240" MajorTopicYN="N">Feasibility Studies</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D006863" MajorTopicYN="N">Hydrogen-Ion Concentration</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D013696" MajorTopicYN="N">Temperature</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D062065" MajorTopicYN="N">Waste Water</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="N">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D014874" MajorTopicYN="N">Water Pollutants, Chemical</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="Y">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018508" MajorTopicYN="Y">Water Purification</DescriptorName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="entrez"><Year>2014</Year><Month>3</Month><Day>14</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2014</Year><Month>3</Month><Day>14</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2014</Year><Month>5</Month><Day>31</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">24622547</ArticleId><ArticleId IdType="doi">10.2166/wst.2013.813</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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