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Coagulation-flocculation of aquaculture effluent using biobased flocculant: From artificial to real wastewater optimization by response surface methodology
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SYSNO ASEP 0574692 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Coagulation-flocculation of aquaculture effluent using biobased flocculant: From artificial to real wastewater optimization by response surface methodology Author(s) Kurniawan, Setyo Budi (MBU-M) ORCID, RID
Imron, M. F. (ID)
Abdullah, S. R. S. (MY)
Othman, A. R. (MY)
Abu Hasan, H. (MY)Article number 103869 Source Title Journal of Water Process Engineering. - : Elsevier - ISSN 2214-7144
Roč. 53, July (2023)Number of pages 20 s. Language eng - English Country NL - Netherlands Keywords Biocoagulant ; Bioflocculant ; Environmental pollution ; Serratia marcescens ; Wastewater treatment Subject RIV EE - Microbiology, Virology OECD category Water resources Method of publishing Open access Institutional support MBU-M - RVO:61388971 UT WOS 001013042900001 EID SCOPUS 85161036814 DOI 10.1016/j.jwpe.2023.103869 Annotation Coagulation-flocculation is currently the best practice for aquaculture effluent treatment, and biobased com-pounds are emerging as coagulant/flocculants. This study aimed to characterize the bioflocculant produced from Serratia marcescens and applied it to treat artificial turbid water (kaolin substrate) and real aquaculture effluent using the combination of one variable at a time (OVAT) and response surface methodology (RSM) analyses. The bioflocculant produced by S. marcescens was characterized as anionic flocculant with isoelectric point at pH 1.7 and 13.3. At pH 7, its protein content was 1.3 & mu,g/mL, and its total carbohydrate level was 0.53 mg/L. The bioflocculant consisted of various carboxylic acids and enzyme intermediates, indicating the presence of poly-saccharides and protein. Comparison of optimized treatment conditions between OVAT and RSM showed that rapid mixing speed, slow mixing time, and sedimentation time were the most influential factors for coagu-lation-flocculation. The aquaculture effluent required lower rapid mixing speed (125 rpm) and shorter sedi-mentation time (39 min) than artificial wastewater (160 rpm and 67 min, respectively). The low performance of the bioflocculant in treating aquaculture effluent was due to the more complex characteristics of real aquaculture effluent compared with those of kaolin substrate. Environmental implications: The characterization of bioflocculant produced by Serratia marcescens in terms of its protein level, total carbohydrate content, and isoelectric point has never been reported. The obtained results may provide an insight into the potential of this compound to substitute widely used chemical flocculants with reliable performance. The findings may also be used as a basis to upscale coagulation-flocculation from being applied to artificial wastewater in the laboratory to treating real wastewater, especially with the use of biobased compounds. Workplace Institute of Microbiology Contact Eliška Spurná, eliska.spurna@biomed.cas.cz, Tel.: 241 062 231 Year of Publishing 2024 Electronic address https://www.sciencedirect.com/science/article/pii/S2214714423003884?via%3Dihub
Number of the records: 1