Fixed-bed biosorption of cadmium using immobilized Scenedesmus obliquus CNW-N cells on loofa (Luffa cylindrica) sponge

Bor Yann Chen, Chun Yen Chen, Wan Qian Guo, Hao Wei Chang, Wen Ming Chen, Duu Jong Lee, Chieh Chen Huang, Nan Qi Ren, Jo Shu Chang

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)

Abstract

A continuous fixed-bed biosorption process was established for cadmium (Cd) removal by Scenedesmus obliquus CNW-N (isolated from southern Taiwan) cells immobilized onto loofa sponge. This immobilized-cell biosorption process allows better recovery and reusability of the microalgal biomass. The growth of microalgae on the matrix support with appropriate nutrient supplementation could enhance the overall metal removal activity. Major operating parameters (e.g., feeding flow rate, cycle number of medium replacement, and particle diameter of the sponge) were studied for treatability evaluation. The most promising cell growth on the sponge support was obtained at a flow rate of 0.284 bed volume (BV)/min, sponge particle diameter of 1. cm, and with one cycle of medium replacement. The performance of fixed-bed biosorption (adsorption capacity of 38.4. mg, breakthrough time at 15.5. h) was achieved at a flow rate of 5. ml/min with an influent concentration of 7.5. mg. Cd/l.

Original languageEnglish
Pages (from-to)175-181
Number of pages7
JournalBioresource technology
Volume160
DOIs
Publication statusPublished - 2014 May

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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