OPTIMIZATION OF CITRIC ACID PRODUCTION BY USING ASPERGILLUS NIGER ON CITRUS WASTE HYDROLYSATE IN COLUMN BIOREACTOR

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dc.contributor.authorDeveci, Ece Ummu
dc.contributor.authorOzyurt, Mustafa
dc.date.accessioned2024-11-07T13:31:56Z
dc.date.available2024-11-07T13:31:56Z
dc.date.issued2017
dc.departmentNiğde Ömer Halisdemir Üniversitesi
dc.description.abstractAgro-industrial wastes such as fruit and vegetable peel constitute a major percentage in the content of wastewater and landfill. For this reason, investigating the conversion of value added products is very crucial. Citrus peel, which is an agro-industrial waste from citrus-processing industry (fruit slice and citrus juice), has a high potential in Turkey. The aim of this study is to demonstrate an alternative substrate combination for the fermentative production of citric acid and decrease the waste generation. In this study, the citrus peel used is obtained from citrus wastes cultivated at the Mediterranean Area of Turkey. Orange peel was derived from Washington navel orange (Citrus sinensis) type. Asp er gillus niger was used as a microorganism, and the hydrolysate obtained from orange residue and molasses were processed with pretreatment as substrates. Optimization was carried out in an aerobic column bio-reactor work-ing in a batch system. After citrus waste was hydrolysed with diluted acid and auto-clave obtain-ed, the hydrolysate had 85 g/L of total sugar concentration. The effects of process parameters such as aeration rate (vvm), initial pH, initial subs-trate concentrations (g/L), methanol ratio (w/v) and inoculum size (w/v) were analyzed and optimized. Within the optimum condition for the maximum production of citric acid, the amounts of the contents were: aeration rate-1 vvm, pH-6.0, substrate-140 g/L, methanol - 4%, inoculum - 3%. The production efficiency of citric acid was calcu-lated as 41.86%. These results, which demons-trate the viability of the citric acid production by column bioreactor from orange peel, could be of interest to possible future industrial applications.
dc.identifier.endpage3622
dc.identifier.issn1018-4619
dc.identifier.issn1610-2304
dc.identifier.issue5
dc.identifier.startpage3614
dc.identifier.urihttps://hdl.handle.net/11480/15139
dc.identifier.volume26
dc.identifier.wosWOS:000403134800063
dc.identifier.wosqualityQ4
dc.indekslendigikaynakWeb of Science
dc.language.isoen
dc.publisherParlar Scientific Publications (P S P)
dc.relation.ispartofFresenius Environmental Bulletin
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241106
dc.subjectOrange peel hydrolysate
dc.subjectcitric acid production
dc.subjectcolumn bioreactor
dc.subjectvalue added waste
dc.titleOPTIMIZATION OF CITRIC ACID PRODUCTION BY USING ASPERGILLUS NIGER ON CITRUS WASTE HYDROLYSATE IN COLUMN BIOREACTOR
dc.typeArticle

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