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Electrocoagulation reduces harvesting costs for microalgae.
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SYSNO ASEP 0537288 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Electrocoagulation reduces harvesting costs for microalgae. Author(s) Lucáková, Simona (UCHP-M) RID, ORCID, SAI
Brányiková, Irena (UCHP-M) RID, ORCID, SAI
Kováčiková, Sára (UCHP-M)
Pivokonský, Martin (UH-J) SAI, ORCID, RID
Filipenská, Monika (UH-J) ORCID, RID
Brányik, T. (CZ)
Růžička, Marek (UCHP-M) RID, ORCID, SAIArticle number 124606 Source Title Bioresource Technology. - : Elsevier - ISSN 0960-8524
Roč. 323, March (2021)Number of pages 8 s. Language eng - English Country GB - United Kingdom Keywords electrocoagulation ; microalgae ; chlorella Subject RIV EI - Biotechnology ; Bionics OECD category Industrial biotechnology Subject RIV - cooperation Institute of Hydrodynamics - Water Pollution ; Quality R&D Projects TJ01000297 GA TA ČR - Technology Agency of the Czech Republic (TA ČR) Method of publishing Open access with time embargo (01.04.2023) Institutional support UCHP-M - RVO:67985858 ; UH-J - RVO:67985874 UT WOS 000614252300006 EID SCOPUS 85098501864 DOI 10.1016/j.biortech.2020.124606 Annotation Centrifugation is the most commonly used method for harvesting autotrophically produced microalgae, but it is expensive due to high energy demands. With the aim of reducing these costs, we tested electrocoagulation with iron electrodes for harvesting Chlorella vulgaris. During extensive lab-scale experiments, the following factors were studied to achieve a high harvesting efficiency and a low iron content in the harvested biomass: electric charge, initial biomass concentration, pH, temperature, agitation intensity, residual salt content and electrolysis time. A harvesting efficiency greater than 95% was achieved over a broad range of conditions and the residual iron content in the biomass complied with legislative requirements for food. Using electrocoagulation as the preconcentration step prior to centrifugation, total energy costs were reduced to 0.136 kWh/kg of dry biomass, which is less than 14% of that for centrifugation alone. Our data show that electrocoagulation is a suitable and cost-effective method for harvesting microalgae. Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2022 Electronic address http://hdl.handle.net/11104/0315017
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