Lestari, Widi Citra (2020) Pengembangan Membran PVDF/LiCl Untuk Proses Pemanenan Mikroalga Nannochloropsis sp. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Proses pemanenan yang efektif menjadi salah satu tantangan terbesar dalam pembuatan biofuel berbasis mikroalga. Membran filtrasi menjadi salah satu metode yang fleksibel dalam pemanenan mikroalga. Penelitian ini melaporkan pemanenan Nannochloropsis sp. dengan membran PVDF yang dikembangkan dengan kombinasi antara penambahan zat aditif LiCl dan metode preparasi thermally induced phase separation (TIPS) dalam pelarut N-metil-2-pirrolidon (NMP). Kondisi optimum membran ditentukan dengan memvariasikan komposisi LiCl dari 1% hingga 3% berat. Membran yang telah dipreparasi dikarakterisasi menggunakan SEM untuk mengetahui morfologi membran, FTIR untuk mengetahui struktur ikatan kimia membran, dan pengujian permeasi air untuk mengetahui hidrofilisitas membran. Hasil menunjukkan bahwa modifikasi penambahan zat aditif dan metode preparasi TIPS pada membran PVDF berhasil meningkatkan sifat hidrofilisitas membran yang ditunjukkan dengan nilai permeasi air tertinggi pada membran PVDF/LiCl 2%, yaitu sebesar 660 L/m2h. Nilai permeasi air tertinggi pada membran PVDF/LiCl 2% menghasilkan rata-rata fluks tertinggi, yaitu 150 L/m2h dan rejeksi mikroalga sebesar 100% pada pemanenan Nannochloropsis sp.
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One of the biggest challenges in implementing microalgae-based biofuels is the effective harvesting process. Filtration membrane has become one of the flexible methods in microalgae harvesting. This study investigated the harvesting of Nannochloropsis sp. using a modified PVDF membrane at various LiCl as an additive using thermally induced phase separation (TIPS) method with N-methyl-2-pyrrolidone (NMP) solvent. The optimum membrane composition was determined at various LiCl additive from 1% to 3% (w/w). The prepared membrane was characterized using SEM to determine the morphology of the membrane, FTIR to determine the structure of the membrane chemical properties, and measurement of water permeability to determine membrane hydrophilicity. The results revealed that membrane PVDF/LiCl 2% showed the highest water permeation (660 L/m2h) and the highest average flux 150 L/m2h, as well as 100% of microalgae rejection of Nannochloropsis sp. harvesting.
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | RSKi 541.335 Les p-1 • Lestari, Widi Citra |
| Uncontrolled Keywords: | PVDF/LiCl membrane, Nannochloropsis sp. harvesting, TIPS, LiCl as additive, Membran PVDF/LiCl, pemanenan Nannochloropsis sp., TIPS, zat aditif LiCl |
| Subjects: | T Technology > TP Chemical technology T Technology > TP Chemical technology > TP248.25.M46 Membrane separation |
| Divisions: | Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47201-(S1) Undergraduate Thesis |
| Depositing User: | Widi Citra Lestari |
| Date Deposited: | 03 Aug 2020 08:01 |
| Last Modified: | 22 May 2023 05:35 |
| URI: | http://repository.its.ac.id/id/eprint/76828 |
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