Malaysian Applied Biology Journal

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36-1-10

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Malays. Appl. Biol. (2007) 36(1): 73–78

THE KINETICS OF PHENOL DEGRADATION BY IMMOBILIZED PSEUDOMONAS SP IN A REPEATED-BATCH PROCESS

MAILIN, M. and FIRDAUSI, R.*

Department of Bioprocess Engineering, Faculty of Chemical & Natural Resources Engineering, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor.
*E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

ABSTRACT

The best operating conditions for phenol degradation by immobilized Pseudomonas sp in packed column were determined, and then evaluated in repeated batch cultures. The maximum degradation rate occurred in i) the support with 1.0 cm diameter or less, ii) loading rate of 2.5 ml/min, and iii) in culture supplemented with nutrient. At these conditions, the immobilized cells managed to remove 100% of 1000 ppm phenol within 24 hours, and repeated the same performance in the next six consecutive batches. This achievement was comparable to published data. The approach employed in this study provides a useful guideline in treating phenolic contaminants using packed reactor system.


ABSTRAK

Keadaan terbaik untuk menjalankan degradasi fenol oleh Pseudomonas sp yang tersekatgerak dalam turus padat telah ditentukan dan dinilai dalam kultur kelompok berulang. Kadar penguraian yang paling tinggi berlaku i) dalam penyokong yang bersaiz 1.0 cm atau kurang, ii) kadar alir 2.5 ml/min, dan iii) dalam kultur yang dibekal nutrien. Pada keadaan terbaik ini, sel tersekatgerak ini berupaya mengurai 100% fenol yang berkepekatan 1000 ppm dalam masa 24 jam, dan mengulangi prestasi yang sama dalam enam kelompok seterusnya berturut-turut. Pencapaian ini setanding dengan data yang pernah dilaporkan. Pendekatan yang dijalankan dalam penyelidikan ini memberi garis panduan yang berguna dalam rawatan fenol menggunakan sistem turus padat.

Key words: Pseudomonas, phenol degradation, bioceramic, repeated batch, packed column

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