title: Enhanced removal of carbon dioxide and alleviation of dissolved oxygen accumulation in photobioreactor with bubble tank.
abstract: Reduction of carbon loss from the effluent is one of the most important aspects of photobioreactors design. In this study, a novel gas sparger of bubble tank was adopted in a photobioreactor to enhance carbon dioxide (CO(2)) mass transfer rate as well as alleviate dissolved oxygen (DO) accumulation. The results showed that low DO level in the culture can be obtained due to the turbulent hydrodynamic condition provided by the bubble tank. The effects of CO(2) concentration, flow rate of influent, and light intensity on CO(2) removal efficiency were investigated. The maximum CO(2) removal efficiency was 94% at flow rate of 30 mL min(-1), light intensity of 179 μmol m(-2) s(-1) and CO(2) concentration of 10%, implying that the novel gas sparger is a promising alternative for CO(2) removal from CO(2)-enriched air by cultivating microalgae in the photobioreactor.
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China. xlchai@tongji.edu.cn
authors.forename: Xiaoli
authors.initials: X
authors.lastname: Chai
authors.forename: Xin
authors.initials: X
authors.lastname: Zhao
mesh_terms: D061249:Batch Cell Culture Techniques; D001673:Biodegradation, Environmental / Q000187:drug effects / Q000528:radiation effects; D002245:Carbon Dioxide / Q000302:isolation & purification* / Q000494:pharmacology; D052918:Environmental Restoration and Remediation / Q000295:instrumentation* / Q000379:methods*; D006863:Hydrogen-Ion Concentration / Q000187:drug effects / Q000528:radiation effects; D008027:Light; D058086:Microalgae / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism / Q000528:radiation effects; D010100:Oxygen / Q000378:metabolism*; D058433:Photobioreactors / Q000382:microbiology*; D012212:Rheology / Q000187:drug effects / Q000528:radiation effects; D012995:Solubility / Q000187:drug effects / Q000528:radiation effects
chemical_list: D002245:Carbon Dioxide; D010100:Oxygen