Harvesting marine microalgae Nannochloropsis sp. using Dissolved Air Flotation (DAF) technique
The production of high-value bioproducts from microalgae biomass has been widely investigated. However, their production is hindered by the expensive harvesting process. To date, flocculation followed by DAF process has been accepted as one of the affordable harvesting approaches. In this study,...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Penerbit Universiti Kebangsaan Malaysia
2021
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| Online Access: | http://journalarticle.ukm.my/16393/ http://journalarticle.ukm.my/16393/1/8.pdf |
| _version_ | 1848814040645632000 |
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| author | Nurafifah Fuad, Rozita Omar, Suryani Kamarudin, Razif Harun, A. Idris, Wan Azlina W.A.K.G, |
| author_facet | Nurafifah Fuad, Rozita Omar, Suryani Kamarudin, Razif Harun, A. Idris, Wan Azlina W.A.K.G, |
| author_sort | Nurafifah Fuad, |
| building | UKM Institutional Repository |
| collection | Online Access |
| description | The production of high-value bioproducts from microalgae biomass has been widely investigated. However, their
production is hindered by the expensive harvesting process. To date, flocculation followed by DAF process has been
accepted as one of the affordable harvesting approaches. In this study, the use of DAF technique was attempted to
harvest marine microalgae Nannochloropsis sp. Batch DAF harvesting was carried out using fabricated DAF unit
equipped with several compartments including separation column, product collecting vessel and rotary skimmer.
Tannin-based biopolymer flocculant, AFlok-BP1 at pH 5 with a concentration of 160 mg/L was used to facilitate the
flocculation of particles. The effects of different saturator pressure at 1.8, 2, and 2.2 bar were then evaluated at a
constant volume of 6 L microalgae culture. The effects of different microalgae culture volumes (6, 8 and 10 L) were
also evaluated at a fixed saturator pressure of 2.2 bar. The highest pressure at 2.2 bar yielded the best result with the
highest total solid of 3.19 ± 0.01% and a maximum yield of 1.70 ± 0.05 g/g (wet basis). The microalgae concentration
was the lowest (0.027 g/L) when 6 L of culture volume was used. However, the values were significantly higher when
the culture volume was increased to 8 and 10 L to approximately 0.035 and 0.050 g/L, respectively. As a conclusion,
the study provided evidence for the feasibility of DAF technique in harvesting marine microalgae Nannochloropsis sp. |
| first_indexed | 2025-11-15T00:27:46Z |
| format | Article |
| id | oai:generic.eprints.org:16393 |
| institution | Universiti Kebangasaan Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T00:27:46Z |
| publishDate | 2021 |
| publisher | Penerbit Universiti Kebangsaan Malaysia |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | oai:generic.eprints.org:163932021-04-13T03:18:45Z http://journalarticle.ukm.my/16393/ Harvesting marine microalgae Nannochloropsis sp. using Dissolved Air Flotation (DAF) technique Nurafifah Fuad, Rozita Omar, Suryani Kamarudin, Razif Harun, A. Idris, Wan Azlina W.A.K.G, The production of high-value bioproducts from microalgae biomass has been widely investigated. However, their production is hindered by the expensive harvesting process. To date, flocculation followed by DAF process has been accepted as one of the affordable harvesting approaches. In this study, the use of DAF technique was attempted to harvest marine microalgae Nannochloropsis sp. Batch DAF harvesting was carried out using fabricated DAF unit equipped with several compartments including separation column, product collecting vessel and rotary skimmer. Tannin-based biopolymer flocculant, AFlok-BP1 at pH 5 with a concentration of 160 mg/L was used to facilitate the flocculation of particles. The effects of different saturator pressure at 1.8, 2, and 2.2 bar were then evaluated at a constant volume of 6 L microalgae culture. The effects of different microalgae culture volumes (6, 8 and 10 L) were also evaluated at a fixed saturator pressure of 2.2 bar. The highest pressure at 2.2 bar yielded the best result with the highest total solid of 3.19 ± 0.01% and a maximum yield of 1.70 ± 0.05 g/g (wet basis). The microalgae concentration was the lowest (0.027 g/L) when 6 L of culture volume was used. However, the values were significantly higher when the culture volume was increased to 8 and 10 L to approximately 0.035 and 0.050 g/L, respectively. As a conclusion, the study provided evidence for the feasibility of DAF technique in harvesting marine microalgae Nannochloropsis sp. Penerbit Universiti Kebangsaan Malaysia 2021-01 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/16393/1/8.pdf Nurafifah Fuad, and Rozita Omar, and Suryani Kamarudin, and Razif Harun, and A. Idris, and Wan Azlina W.A.K.G, (2021) Harvesting marine microalgae Nannochloropsis sp. using Dissolved Air Flotation (DAF) technique. Sains Malaysiana, 50 (1). pp. 73-83. ISSN 0126-6039 https://www.ukm.my/jsm/malay_journals/jilid50bil1_2021/KandunganJilid50Bil1_2021.html |
| spellingShingle | Nurafifah Fuad, Rozita Omar, Suryani Kamarudin, Razif Harun, A. Idris, Wan Azlina W.A.K.G, Harvesting marine microalgae Nannochloropsis sp. using Dissolved Air Flotation (DAF) technique |
| title | Harvesting marine microalgae Nannochloropsis sp. using Dissolved Air Flotation (DAF) technique |
| title_full | Harvesting marine microalgae Nannochloropsis sp. using Dissolved Air Flotation (DAF) technique |
| title_fullStr | Harvesting marine microalgae Nannochloropsis sp. using Dissolved Air Flotation (DAF) technique |
| title_full_unstemmed | Harvesting marine microalgae Nannochloropsis sp. using Dissolved Air Flotation (DAF) technique |
| title_short | Harvesting marine microalgae Nannochloropsis sp. using Dissolved Air Flotation (DAF) technique |
| title_sort | harvesting marine microalgae nannochloropsis sp. using dissolved air flotation (daf) technique |
| url | http://journalarticle.ukm.my/16393/ http://journalarticle.ukm.my/16393/ http://journalarticle.ukm.my/16393/1/8.pdf |