Proses Recovery Filter Aid (Perlite) dari Limbah Padat Industri Agar Gracilaria Sp. dengan Metode Degradasi Kimia

Rafi, Syahdatul Muhammad and Larasati, Niken Audi (2026) Proses Recovery Filter Aid (Perlite) dari Limbah Padat Industri Agar Gracilaria Sp. dengan Metode Degradasi Kimia. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Industri pengolahan rumput laut Gracilaria sp. menghasilkan limbah padat berupa perlite bekas filter aid yang tidak dapat digunakan kembali karena pori-porinya tersumbat oleh residu organik. Penelitian ini bertujuan mengevaluasi proses recovery perlite melalui kombinasi oksidasi menggunakan hidrogen peroksida (H₂O₂) dan hidrolisis menggunakan asam sitrat serta asam asetat pada konsentrasi 0,1 M, 0,2 M, 0,3 M dan 0,5 M. Keberhasilan proses dievaluasi berdasarkan nilai recovery, karakteristik fisik dan kimia perlite, serta analisis biaya.
Hasil penelitian menunjukkan bahwa nilai recovery tertinggi diperoleh pada penggunaan asam sitrat 0,5 M sebesar 16,85%, sedangkan pada asam asetat diperoleh pada konsentrasi 0,1 M sebesar 15,28%. Karakterisasi SEM-EDX dan FTIR menunjukkan bahwa proses recovery mampu menghilangkan residu organik, menghasilkan permukaan yang lebih bersih, membuka kembali struktur pori, serta meningkatkan kandungan silikon (Si) relatif. Perlite hasil recovery menggunakan asam sitrat 0,1 M memiliki kandungan Si tertinggi sebesar 56,08 ± 19,22 wt%, lebih tinggi dibandingkan perlite komersial (49,98 ± 7,33 wt%) dan perlite hasil recovery menggunakan asam asetat 0,1 M (48,29 ± 15,08 wt%). Selain itu, penggunaan asam sitrat memerlukan biaya proses yang lebih rendah dibandingkan asam asetat.
Berdasarkan hasil tersebut, asam sitrat merupakan agen hidrolisis yang lebih efektif dan ekonomis untuk recovery perlite dari limbah padat industri agar Gracilaria sp.. Kombinasi oksidasi H₂O₂ dan hidrolisis menggunakan asam sitrat berpotensi mendukung pemanfaatan kembali perlite sebagai filter aid dan penerapan konsep ekonomi sirkular pada industri agar.
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The Gracilaria sp. agar industry generates solid waste in the form of spent perlite used as a filter aid during the agar purification process. The spent perlite cannot be reused because its pores are clogged with organic residues. This study aimed to evaluate the recovery of perlite using a combination of hydrogen peroxide (H₂O₂) oxidation and organic acid hydrolysis with citric acid and acetic acid at concentrations of 0.1 M, 0.2 M, and 0.5 M. Recovery performance was evaluated based on recovery yield, the physical and chemical characteristics of the recovered perlite, and process cost analysis.
The results showed that the highest recovery yield was achieved using 0.5 M citric acid (16.85%), while the highest yield for acetic acid was obtained at 0.1 M (15.28%). SEM-EDX and FTIR analyses confirmed that the recovery process effectively removed organic residues, produced a cleaner surface, reopened the pore structure, and increased the relative silicon (Si) content. Perlite recovered using 0.1 M citric acid exhibited the highest Si content (56.08 ± 19.22 wt%), exceeding that of commercial perlite (49.98 ± 7.33 wt%) and perlite recovered using 0.1 M acetic acid (48.29 ± 15.08 wt%). In addition, the citric acid process required lower operating costs than the acetic acid process.
Overall, citric acid proved to be a more effective and cost-efficient hydrolysis agent than acetic acid for perlite recovery from Gracilaria sp. agar industry solid waste. The combination of H₂O₂ oxidation and citric acid hydrolysis offers a promising approach for regenerating spent perlite as a filter aid while supporting circular economy practices in the agar industry.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Gracilaria sp., asam asetat, asam sitrat, hidrogen peroksida, perlite, recovery, Perlite, Gracilaria sp., Recovery, Hydrogen Peroxide, Organic Acids
Subjects:	T Technology > TD Environmental technology. Sanitary engineering > TD899 Waste control in special industries, plants, processes, etc T Technology > TP Chemical technology > TP248.3 Biochemical engineering. Bioprocess engineering
Divisions:	Faculty of Vocational > 24305-Industrial Chemical Engineering Technology
Depositing User:	Niken Audi Larasati
Date Deposited:	31 Jul 2026 07:04
Last Modified:	31 Jul 2026 07:04
URI:	http://repository.its.ac.id/id/eprint/140494

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