Operating conditions for the continuous bioremediation of free cyanide contaminated wastewater using Aspergillus awamori
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...
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| Veröffentlicht in: | Water science and technology 2014-01, Vol.69 (5), p.989-993 |
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| creator | SANTOS, B. A. Q NTWAMPE, S. K. O DOUGHARI, J. H MUCHATIBAYA, G |
| description | 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_str_mv | 10.2166/wst.2013.813 |
| format | Article |
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A. Q ; NTWAMPE, S. K. O ; DOUGHARI, J. H ; MUCHATIBAYA, G</creator><creatorcontrib>SANTOS, B. A. Q ; NTWAMPE, S. K. O ; DOUGHARI, J. H ; MUCHATIBAYA, G</creatorcontrib><description>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.</description><identifier>ISSN: 0273-1223</identifier><identifier>EISSN: 1996-9732</identifier><identifier>DOI: 10.2166/wst.2013.813</identifier><identifier>PMID: 24622547</identifier><identifier>CODEN: WSTED4</identifier><language>eng</language><publisher>London: International Water Association</publisher><subject>Agricultural wastes ; Ammonium ; Ammonium compounds ; Analysis methods ; Applied sciences ; Aspergillus - chemistry ; Aspergillus awamori ; Biodegradation ; Biodegradation, Environmental ; Biological activity ; Bioremediation ; Carbohydrates ; Carbon sources ; Citric acid ; Citrus sinensis ; Cultivation ; Cyanides ; Cyanides - chemistry ; Degradation ; Exact sciences and technology ; Feasibility Studies ; General purification processes ; Global environmental pollution ; Hydrogen-Ion Concentration ; Microbial activity ; Microorganisms ; Natural water pollution ; Pollution ; Temperature ; Waste materials ; Waste Water - chemistry ; Wastewater ; Wastewater pollution ; Wastewater treatment ; Wastewaters ; Water Pollutants, Chemical - chemistry ; Water Purification ; Water treatment and pollution</subject><ispartof>Water science and technology, 2014-01, Vol.69 (5), p.989-993</ispartof><rights>2015 INIST-CNRS</rights><rights>Copyright IWA Publishing Mar 2014</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27902,27903</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=28388276$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/24622547$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>SANTOS, B. A. Q</creatorcontrib><creatorcontrib>NTWAMPE, S. K. O</creatorcontrib><creatorcontrib>DOUGHARI, J. H</creatorcontrib><creatorcontrib>MUCHATIBAYA, G</creatorcontrib><title>Operating conditions for the continuous bioremediation of free cyanide contaminated wastewater using Aspergillus awamori</title><title>Water science and technology</title><addtitle>Water Sci Technol</addtitle><description>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.</description><subject>Agricultural wastes</subject><subject>Ammonium</subject><subject>Ammonium compounds</subject><subject>Analysis methods</subject><subject>Applied sciences</subject><subject>Aspergillus - chemistry</subject><subject>Aspergillus awamori</subject><subject>Biodegradation</subject><subject>Biodegradation, Environmental</subject><subject>Biological activity</subject><subject>Bioremediation</subject><subject>Carbohydrates</subject><subject>Carbon sources</subject><subject>Citric acid</subject><subject>Citrus sinensis</subject><subject>Cultivation</subject><subject>Cyanides</subject><subject>Cyanides - chemistry</subject><subject>Degradation</subject><subject>Exact sciences and technology</subject><subject>Feasibility Studies</subject><subject>General purification processes</subject><subject>Global environmental pollution</subject><subject>Hydrogen-Ion Concentration</subject><subject>Microbial activity</subject><subject>Microorganisms</subject><subject>Natural water pollution</subject><subject>Pollution</subject><subject>Temperature</subject><subject>Waste materials</subject><subject>Waste Water - chemistry</subject><subject>Wastewater</subject><subject>Wastewater pollution</subject><subject>Wastewater treatment</subject><subject>Wastewaters</subject><subject>Water Pollutants, Chemical - chemistry</subject><subject>Water Purification</subject><subject>Water treatment and pollution</subject><issn>0273-1223</issn><issn>1996-9732</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><sourceid>BENPR</sourceid><recordid>eNqN0c1rFDEYBvAgil2rN88yIIIHZ5vkzebjWIofhUIv9hzeySQ1ZWayJjOs_e_NsKuCp54Skh9PePMQ8pbRLWdSXhzKvOWUwVYzeEY2zBjZGgX8OdlQrqBlnMMZeVXKA6VUgaAvyRkXkvOdUBvy63bvM85xum9cmvo4xzSVJqTczD_8elSvlrSUposp-9H3EVfSpNCE7Kt4xCn2R4ljnHD2fXPAMvtD3eZmKWv0Zamv3MdhqEF4wDHl-Jq8CDgU_-a0npO7L5-_X31rb26_Xl9d3rQOwMxtAGkohx6d6RR4RM1R695jp4TRPXjlEZQDpndU9TseTKDUiU4I2WndSTgnH4-5-5x-Lr7MdozF-WHAyde5LNsxqQTVoJ9AqVKGMr3S9__Rh7TkqQ5imRGgJSjDq_p0VC6nUrIPdp_jiPnRMmrX8mwtz67l2Vpe5e9OoUtXf_ov_tNWBR9OAIvDIWScXCz_XB1CcyXhN4IspBU</recordid><startdate>20140101</startdate><enddate>20140101</enddate><creator>SANTOS, B. 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A. Q ; NTWAMPE, S. K. O ; DOUGHARI, J. 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A. Q</au><au>NTWAMPE, S. K. O</au><au>DOUGHARI, J. H</au><au>MUCHATIBAYA, G</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Operating conditions for the continuous bioremediation of free cyanide contaminated wastewater using Aspergillus awamori</atitle><jtitle>Water science and technology</jtitle><addtitle>Water Sci Technol</addtitle><date>2014-01-01</date><risdate>2014</risdate><volume>69</volume><issue>5</issue><spage>989</spage><epage>993</epage><pages>989-993</pages><issn>0273-1223</issn><eissn>1996-9732</eissn><coden>WSTED4</coden><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.</abstract><cop>London</cop><pub>International Water Association</pub><pmid>24622547</pmid><doi>10.2166/wst.2013.813</doi><tpages>5</tpages></addata></record> |
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| identifier | ISSN: 0273-1223 |
| ispartof | Water science and technology, 2014-01, Vol.69 (5), p.989-993 |
| issn | 0273-1223 1996-9732 |
| language | eng |
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| source | MEDLINE; EZB-FREE-00999 freely available EZB journals |
| subjects | Agricultural wastes Ammonium Ammonium compounds Analysis methods Applied sciences Aspergillus - chemistry Aspergillus awamori Biodegradation Biodegradation, Environmental Biological activity Bioremediation Carbohydrates Carbon sources Citric acid Citrus sinensis Cultivation Cyanides Cyanides - chemistry Degradation Exact sciences and technology Feasibility Studies General purification processes Global environmental pollution Hydrogen-Ion Concentration Microbial activity Microorganisms Natural water pollution Pollution Temperature Waste materials Waste Water - chemistry Wastewater Wastewater pollution Wastewater treatment Wastewaters Water Pollutants, Chemical - chemistry Water Purification Water treatment and pollution |
| title | Operating conditions for the continuous bioremediation of free cyanide contaminated wastewater using Aspergillus awamori |
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