Effects of microalgal concentration and pH with flocculant on microfiltration
To make algal biomass a suitable feedstock for fuel and bioproducts, a practical way of dewatering and concentrating algal cells must be devised. In this study, a system comprising microfiltration membranes combined with a flocculant was developed on a low-cost ceramic substrate to harvest Tetradesm...
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| Format: | Article |
| Language: | English |
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Association of the Chemical Engineers of Serbia
2023-01-01
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| Series: | Chemical Industry and Chemical Engineering Quarterly |
| Subjects: | |
| Online Access: | https://doiserbia.nb.rs/img/doi/1451-9372/2023/1451-93722200032M.pdf |
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| author | Mendes Ana Luiza de Oliveira Daimon Jefferson Jung de Oliveira Thamayne Valadares Pederson Voll Fernando Augusto Vieira Rafael Bruno Mariano Andre Bellini |
| author_facet | Mendes Ana Luiza de Oliveira Daimon Jefferson Jung de Oliveira Thamayne Valadares Pederson Voll Fernando Augusto Vieira Rafael Bruno Mariano Andre Bellini |
| author_sort | Mendes Ana Luiza |
| collection | DOAJ |
| description | To make algal biomass a suitable feedstock for fuel and bioproducts, a practical way of dewatering and concentrating algal cells must be devised. In this study, a system comprising microfiltration membranes combined with a flocculant was developed on a low-cost ceramic substrate to harvest Tetradesmus obliquus efficiently. The effects of tannin-based flocculant concentration, microalgal concentration, and pH on microfiltration were studied. Permeate flux was evaluated for 5400 s through experiments to analyze the total resistance and the fouling mechanism. Results show that the cake filtration model best represented the data. The experiments at pH 4 and 0.06 kg/m3 of microalgae (with flocculant) showed improved results with a reduction in the J/J0 (permeate flux/initial flux) ratio of 39%. In addition, the effects of critical flux, transmembrane pressure, and fouling mechanism on microfiltration were investigated under the best conditions studied. Applying the stepping method to the critical flux yielded a permeate flux of 2.2 × 10-5 m3m−2s−1. The 70 kPa condition showed the highest permeate flux (3.0 × 10−5 m3m−2s−1) and a low cake pore blocking coefficient (k) obtained by the modified Hermia model. This study showed that Tanfloc at low pH could maximize microalgal separation in membrane processes. |
| first_indexed | 2024-03-12T16:12:34Z |
| format | Article |
| id | doaj.art-82c7c33dcb0c407aa8202958bddcb312 |
| institution | Directory Open Access Journal |
| issn | 1451-9372 2217-7434 |
| language | English |
| last_indexed | 2024-03-12T16:12:34Z |
| publishDate | 2023-01-01 |
| publisher | Association of the Chemical Engineers of Serbia |
| record_format | Article |
| series | Chemical Industry and Chemical Engineering Quarterly |
| spelling | doaj.art-82c7c33dcb0c407aa8202958bddcb3122023-08-09T12:42:13ZengAssociation of the Chemical Engineers of SerbiaChemical Industry and Chemical Engineering Quarterly1451-93722217-74342023-01-0129425326210.2298/CICEQ220125032M1451-93722200032MEffects of microalgal concentration and pH with flocculant on microfiltrationMendes Ana Luiza0de Oliveira Daimon Jefferson Jung1de Oliveira Thamayne Valadares2Pederson Voll Fernando Augusto3Vieira Rafael Bruno4Mariano Andre Bellini5Universidade Federal do Paraná, Engenharia e Ciência dos Materiais, Curitiba, BrazilUniversidade Federal do Paraná, Engenharia Química, Curitiba, BrazilUniversidade Federal de Uberlândia, Faculdade de Engenharia Química, Uberlândia, BrazilUniversidade Federal do Paraná, Engenharia Química, Curitiba, BrazilUniversidade Federal de Uberlândia, Faculdade de Engenharia Química, Uberlândia, BrazilUniversidade Federal do Paraná, Departamento de Engenharia Elétrica, Curitiba, BrazilTo make algal biomass a suitable feedstock for fuel and bioproducts, a practical way of dewatering and concentrating algal cells must be devised. In this study, a system comprising microfiltration membranes combined with a flocculant was developed on a low-cost ceramic substrate to harvest Tetradesmus obliquus efficiently. The effects of tannin-based flocculant concentration, microalgal concentration, and pH on microfiltration were studied. Permeate flux was evaluated for 5400 s through experiments to analyze the total resistance and the fouling mechanism. Results show that the cake filtration model best represented the data. The experiments at pH 4 and 0.06 kg/m3 of microalgae (with flocculant) showed improved results with a reduction in the J/J0 (permeate flux/initial flux) ratio of 39%. In addition, the effects of critical flux, transmembrane pressure, and fouling mechanism on microfiltration were investigated under the best conditions studied. Applying the stepping method to the critical flux yielded a permeate flux of 2.2 × 10-5 m3m−2s−1. The 70 kPa condition showed the highest permeate flux (3.0 × 10−5 m3m−2s−1) and a low cake pore blocking coefficient (k) obtained by the modified Hermia model. This study showed that Tanfloc at low pH could maximize microalgal separation in membrane processes.https://doiserbia.nb.rs/img/doi/1451-9372/2023/1451-93722200032M.pdfceramic membraneconcentrationphmicroalgalmicrofiltration |
| spellingShingle | Mendes Ana Luiza de Oliveira Daimon Jefferson Jung de Oliveira Thamayne Valadares Pederson Voll Fernando Augusto Vieira Rafael Bruno Mariano Andre Bellini Effects of microalgal concentration and pH with flocculant on microfiltration Chemical Industry and Chemical Engineering Quarterly ceramic membrane concentration ph microalgal microfiltration |
| title | Effects of microalgal concentration and pH with flocculant on microfiltration |
| title_full | Effects of microalgal concentration and pH with flocculant on microfiltration |
| title_fullStr | Effects of microalgal concentration and pH with flocculant on microfiltration |
| title_full_unstemmed | Effects of microalgal concentration and pH with flocculant on microfiltration |
| title_short | Effects of microalgal concentration and pH with flocculant on microfiltration |
| title_sort | effects of microalgal concentration and ph with flocculant on microfiltration |
| topic | ceramic membrane concentration ph microalgal microfiltration |
| url | https://doiserbia.nb.rs/img/doi/1451-9372/2023/1451-93722200032M.pdf |
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