 Process intensification in wastewater treatment: oxygen transfer characterisation of a jet loop reactor for aerobic biological wastewater treatmentB. Keskinler, G. Akay, T. Pekdemir, E. Yildiz and A. Nuhoglu International Journal of Environmental Technology and Management, 2004, vol. 4, issue 3, 220-235 Abstract: The overall volumetric mass transfer coefficient (KLa) and the overall gas holdup (ε) were measured in a jet loop reactor (JLR) used for the intensive aerobic biological treatment of waste water. The process parameters and their ranges were: inlet water flow rate: 30 &#le; QL &#le; 70 l/min, inlet air flow rate: 4 &#le; Qg &#le; 36 l/min. The ratio of water flow rates from the bottom of the reactor (QB) and the inlet water flow rate (QL) varied in the range 0.0 &#le; QB/QL &#le; 0.92. It was found that, both KLa, and ε increased with increasing Qg. Up to a critical Qg value, neither KLa nor ε varied with energy dissipation rate per unit volume, E/V, but beyond these Qg values, KLa decreased while ε increased with increasing E/V. Water withdrawal from the bottom of the reactor in addition to that from the top, increased KLa up to 30% depending on the process conditions. Use of pure oxygen instead of air could also lead to increases in KLa up to 19%. Keywords: gas hold-up; jet loop reactor; mass transfer; oxygen transfer; process intensification; wastewater treatment; water treatment; water quality. (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:ids:ijetma:v:4:y:2004:i:3:p:220-235 Access Statistics for this article More articles in International Journal of Environmental Technology and Management from Inderscience Enterprises Ltd |
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