Cooking oil-surfactant emulsion in water for harvesting Chlorella vulgaris by sedimentation or flotation

Autor(es)

Potocar, Tomas ^[1] ; Leite, Luan de Souza ^{[1, 2, 3]} ; Daniel, Luiz Antonio ^{[2, 3]} ; Pivokonsky, Martin ^[4] ; Matoulkova, Dagmar ^[5] ; Branyik, Tomas ^[1]

Afiliação do(s) autor(es)

^[1] Univ Chem & Technol Prague, Dept Biotechnol, Tech 5, Prague 16628 - Czech Republic

^[2] Univ Sao Paulo, Sao Carlos Sch Engn, Dept Hydraul, Av Trabalhador Sao Carlense 400, BR-1356659 Sao Carlos, SP - Brazil

^[3] Univ Sao Paulo, Sao Carlos Sch Engn, Sanitat Dept, Av Trabalhador Sao Carlense 400, BR-1356659 Sao Carlos, SP - Brazil

^[4] Czech Acad Sci, Inst Hydrodynam, Pod Patankou 30-5, Prague 16612 6 - Czech Republic

^[5] Res Inst Brewing & Malting, Lipova 15, Prague 12044 - Czech Republic

• Tipo de documento: Artigo Científico
• Fonte: Bioresource Technology; v. 311, SEP 2020.
• Citações Web of Science: 0

Resumo

In this study, a novel harvesting emulsion (HEM) consisting of cooking oil in an aqueous solution of cetyltrimethylammonium bromide (CTAB) was tested for the harvesting of a technologically important microalga, Chlorella vulgaris. The influence of HEM dose, biomass and bovine serum albumin (BSA) (model interferer compound) on harvesting efficiency (E) were studied. The HEM E was over 90% at pH 10 (0.33% (v/v) cooking oil, 6.7 mg/L of CTAB) and 12 (0.13% (v/v) cooking oil, 2.7 mg/L of CTAB). Harvesting efficiencies at pH 4 and 7 were < 73.5% due to the absence of precipitate formation. Bovine serum albumin (10 mg/L) increased the HEM dose necessary to achieve E (>) 90% by 1.2 (pH 10), and 3 fold (pH 12). By manipulating the dose of HEM and pH, the method of harvesting (flocculation/sedimentation or flotation) was adjustable depending on the technological requirements. (AU)

• Processo FAPESP: 18/01218-3 - Mecanismo envolvido na floculação alcalina de Chlorella sorokiniana e sua validação em água negra
• Beneficiário: Luan de Souza Leite
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Mestrado