Bioleaching of nickel from spent petroleum catalyst using Acidithiobacillus thiooxidans DSM-11478.

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dc.contributor.authorSharma, Mohita
dc.contributor.authorBisht, Varsha
dc.contributor.authorSingh, Bina
dc.contributor.authorMandal, Ajoy K
dc.contributor.authorLal, Banwari
dc.contributor.authorSarma, Priyangshu M
dc.date.accessioned2015-06-27T09:24:11Z
dc.date.available2015-06-27T09:24:11Z
dc.date.issued2015-06
dc.description.abstractThe present work deals with optimization of culture conditions and process parameters for bioleaching of spent petroleum catalyst collected from a petroleum refinery. The efficacy of Ni bioleaching from spent petroleum catalyst was determined using pure culture of Acidithiobacillus thiooxidans DSM-11478. The culture conditions of pH, temperature and headspace volume to media volume ratio were optimized. EDX analysis was done to confirm the presence of Ni in the spent catalyst after roasting it to decoke its surface. The optimum temperature for A. thiooxidans DSM-11478 growth was found to be 32 °C. The enhanced recovery of nickel at very low pH was attributed to the higher acidic strength of sulfuric acid produced in the culture medium by the bacterium. During the bioleaching process, 89% of the Ni present in the catalyst waste could be successfully recovered in optimized conditions. This environment friendly bioleaching process proved efficient than the chemical method. Taking leads from the lab scale results, bioleaching in larger volumes (1, 5 and 10 L) was also performed to provide guidelines for taking up this technology for in situ industrial waste management.en_US
dc.identifier.citationSharma Mohita, Bisht Varsha, Singh Bina, Jain Pratiksha, Mandal Ajoy K, Lal Banwari, Sarma Priyangshu M. Bioleaching of nickel from spent petroleum catalyst using Acidithiobacillus thiooxidans DSM-11478. Indian Journal of Experimental Biology. 2015 Jun; 53(6): 388-394.en_US
dc.identifier.issn0975-1009
dc.identifier.urihttps://imsear.searo.who.int/handle/123456789/158519
dc.language.isoenen_US
dc.publisherNISCAIR-CSIR, Indiaen_US
dc.source.urihttps://nopr.niscair.res.in/handle/123456789/31580en_US
dc.subjectPetroleum refineryen_US
dc.subjectProteobacteriaen_US
dc.subjectThiobacillus concretivorusen_US
dc.subjectWaste treatmenten_US
dc.subject.meshAcidithiobacillus thiooxidans --metabolism
dc.subject.meshIndustrial Waste --analysis
dc.subject.meshNickel --isolation & purification
dc.subject.meshPetroleum
dc.subject.meshProteobacteria --classification
dc.subject.meshTrace Elements --isolation & purification
dc.subject.meshTrace Elements --metabolism
dc.titleBioleaching of nickel from spent petroleum catalyst using Acidithiobacillus thiooxidans DSM-11478.en_US
dc.typeArticleen_US
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