title: Enhanced butanol production by immobilized Clostridium beijerinckii TISTR 1461 using zeolite 13X as a carrier.
abstract: Butanol production by cell immobilization onto porous materials-brick and zeolite 13X-was investigated using Clostridium beijerinckii TISTR 1461. Characterization results of two materials were completed to evaluate their potential as an immobilization carrier. Although zeolite has greater porosity than brick, it cannot be used for cell aggregation without treating with chemical. After immobilization, both materials can enhance butanol titers from 5.29 to 5.80g/L and 8.58g/L using brick and zeolite, respectively. Butanol to glucose yield also improved from 0.14 to 0.16g/g after immobilization. It was found that butanol production significantly increased due to an increase in buffering capacity, strong bonding between the zeolite surface and cell, and butanol tolerance. In addition, repeated batch fermentation was performed, demonstrating that cells immobilized onto zeolite 13X have high stability and potential for long-term use in continuous fermentation.
authors.affiliation: The Petroleum and Petrochemical College, Chulalongkorn University, Bangkok 10330, Thailand.
authors.forename: Rapeephat
authors.initials: R
authors.lastname: Vichuviwat
authors.affiliation: The Petroleum and Petrochemical College, Chulalongkorn University, Bangkok 10330, Thailand.
authors.forename: Akarin
authors.initials: A
authors.lastname: Boonsombuti
authors.affiliation: The Petroleum and Petrochemical College, Chulalongkorn University, Bangkok 10330, Thailand. Electronic address: apanee.l@chula.ac.th.
authors.forename: Apanee
authors.initials: A
authors.lastname: Luengnaruemitchai
authors.affiliation: The Petroleum and Petrochemical College, Chulalongkorn University, Bangkok 10330, Thailand.
authors.forename: Sujitra
authors.initials: S
authors.lastname: Wongkasemjit
mesh_terms: D000096:Acetone / Q000378:metabolism; D061249:Batch Cell Culture Techniques; D001709:Biotechnology / Q000379:methods*; D000440:Butanols / Q000378:metabolism*; D018914:Cells, Immobilized / Q000378:metabolism / Q000648:ultrastructure; D046970:Clostridium beijerinckii / Q000187:drug effects / Q000378:metabolism* / Q000648:ultrastructure; D000431:Ethanol / Q000378:metabolism; D005285:Fermentation / Q000187:drug effects; D006863:Hydrogen-Ion Concentration; D016062:Porosity; D013052:Spectrometry, X-Ray Emission; D017641:Zeolites / Q000494:pharmacology*
chemical_list: D000440:Butanols; D017641:Zeolites; D000096:Acetone; D000431:Ethanol
keywords: ABE fermentation; Brick; Cell immobilization; Clostridium beijerinckii; Zeolite 13X