Insights into biofilm development on polyhydroxyalkanoate biofilm carrier for anoxic azo dye decolourization of acid orange 7.

Autor: Chang JY; School of Chemical Sciences, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia., Syauqi TA; School of Biological Sciences, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia., Sudesh K; School of Biological Sciences, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia., Ng SL; School of Chemical Sciences, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia. Electronic address: slng@usm.my.
Jazyk: angličtina
Zdroj: Bioresource technology [Bioresour Technol] 2024 Feb; Vol. 393, pp. 130054. Date of Electronic Publication: 2023 Nov 22.
DOI: 10.1016/j.biortech.2023.130054
Abstrakt: Polyhydroxyalkanoates (PHAs) are promising alternatives to non-degradable polymers in various applications. This study explored the use of biologically recovered PHA as a biofilm carrier in a moving bed biofilm reactor for acid orange 7 treatment. The PHA was comprised of 86 ± 1 mol% of 3-hydroxybutyrate and 14 ± 1 mol% of 3-hydroxyhexanoate and was melt-fused at 140 °C into pellets. The net positive surface charge of the PHA biocarrier facilitated attachment of negatively charged activated sludge, promoting biofilm formation. A 236-µm mature biofilm developed after 26 days. The high polysaccharides-to-protein ratio (>1) in the biofilm's extracellular polymeric substances indicated a stable biofilm structure. Four main microbial strains in the biofilm were identified as Leclercia adecarboxylata, Leuconostoc citreum, Bacillus cereus, and Rhodotorula mucilaginosa, all of which exhibited decolourization abilities. In conclusion, PHA holds promise as an effective biocarrier for biofilm development, offering a sustainable alternative in wastewater treatment applications.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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