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Sari Pustaka Hendro Risdianto
JURNAL SELULOSA Vol 42, No 02 (2007): BERITA SELULOSA
Publisher : Center for Pulp and Paper

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (165.499 KB) | DOI: 10.25269/jsel.v42i2.194

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PENGARUH APLIKASI JAMUR PELAPUK PUTIH PADA BIOPULPING RAMI (Boehmeria nivea) TERHADAP KUALITAS PULP BELUM PUTIH (EFFECT OF WHITE ROT FUNGI APPLICATION IN BIOPULPING OF RAMIE (Boehmeria Nivea) ON THE QUALITY OF UNBLEACHED PULP) Chandra Apriana Purwita; Hendro Risdianto
JURNAL SELULOSA Vol 6, No 02 (2016): JURNAL SELULOSA
Publisher : Center for Pulp and Paper

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (808.448 KB) | DOI: 10.25269/jsel.v6i02.95

Abstract

The research of white rot fungi application in biopulping ramie has been done to obtain the effective fungus. The study was conducted in 3 stages: biopulping, cooking, and manufacture of pulp handsheets. The biopulping of ramie was done by varying four species of fungi which were Phanerochaete chrysosporium, Marasmius sp., Trametes hirsuta, and Trametes versicolor, with temperature of ± 28°C for 7 days. The cooking was done on ramie from selected biopulping treatment and compared with untreated one. The experiments was carried out by soda cooking in a rotating digester at 12% active alkaline, ratio of the solid to liquid 1: 5, temperature of 165 °C, time of 3.5 hours. Next step was the manufacture of pulp handsheets. The observations were conducted on percent lignin removal, Kappa number, burst and tear index. The results showed that Marasmius sp. with the laccase activity of 0.1638 U/mL was the best with 40.4% of lignin removal degree. The ramie cooking process with Marasmius sp. treatment produced unbleached pulp with 7.2% lower Kappa number compared to the untreated one. The pulp that has been treated with Marasmius sp. produced better quality unbleached pulp with the physical properties of burst and tear index of 10.52 mNm2 /g and 1.24 kN/g, respectively. ABSTRAKPenelitian aplikasi jamur pelapuk putih pada biopulping rami telah dilakukan dengan tujuan mendapatkan jenis jamur yang efektif. Penelitian dilakukan dalam 3 tahap : biopulping, pemasakan, dan pembuatan lembaran pulp. Biopulping rami dilakukan dengan variasi 4 spesies jamur, yaitu Phanerochaete chrysosporium, Marasmius sp., Trametes hirsuta, dan Trametes versicolor, pada kondisi suhu ±28 °C selama 7 hari. Pemasakan dilakukan terhadap rami dari perlakuan biopulping terpilih dan dibandingkan dengan rami tanpa perlakuan jamur. Percobaan pemasakan dilakukan dengan proses soda dalam digester berputar pada kondisi alkali aktif 12%, rasio padatan terhadap cairan pemasak 1:5, suhu 165°C, waktu 3,5 jam. Selanjutnya, dilakukan pembuatan lembaran pulp rami. Pengamatan dilakukan terhadap persentase penyisihan lignin, bilangan Kappa, indek sobek, dan indeks retak. Hasil penelitian menunjukkan bahwa Marasmius sp. dengan aktivitas lakase 0,1638 U/mL merupakan yang terbaik dengan derajat penyisihan lignin 40,4%. Proses pemasakan rami dengan perlakuan Marasmius sp. menghasilkan pulp belum putih dengan bilangan Kappa lebih rendah 7,2% dibandingkan tanpa perlakuan jamur. Kualitas pulp yang telah diberi perlakuan jamur Marasmius sp. menghasilkan pulp belum putih yang lebih baik, dengan sifat fisik indeks retak dan indeks sobek berturut-turut 10,52 mNm2 /g dan 1,24 kN/g.Kata kunci: rami, biopulping, penyisihan lignin, jamur pelapuk putih
Biodeinking Kertas Koran Bekas menggunakan Ekstrak Kasar Lakase dari Marasmiellus palmivorus Sitatun Zunaidah; Rendana Saputra; Sri Harjati Suhardi; Hendro Risdianto
JURNAL SELULOSA Vol 11, No 01 (2021): JURNAL SELULOSA
Publisher : Center for Pulp and Paper

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25269/jsel.v11i01.284

Abstract

Biodeinking of Old Newspaper using Crude Laccase from Marasmiellus palmivorus   Abstract Enzymatic deinking is receiving growing attention due to the negative environmental impact caused by chemical deinking. Old newspaper (ONP) is one of the materials that can be used in paper recycling. The use of the crude laccase from Marasmiellus palmivorus in biodeinking is due to its capability to remove the ink. The objective of this research was to determine the potential use of laccase in enzymatic deinking to increase the brightness value and reduce ERIC (Effective Residual Ink Concentration) value on old newspapers. Laccase was produced from M. palmivorus by using cultivation in a static Solid State Fermentation (SSF) reactor with lignocellulosic as substrate. The methodology involves the production of crude laccase extract, laccase optimization using variations of dosage, temperatures, and times. The highest laccase activity is 1,142.86 U/L (16 U/mg). Optimization of laccase crude extract enzyme in biodeinking can increase brightness values by 15.22% (54.27 %ISO) to 25.03% (58.89 %ISO) compared to controls (47.09% ISO) and reduce ERIC values by 46.12% (452.1 ppm) to 68.26% (266.4 ppm) compared to control (839.2 ppm). Keywords: biodeinking, Marasmiellus palmivorus, laccase, old newspaper Abstrak Deinking enzimatis semakin mendapat perhatian karena dampak negatif terhadap lingkungan yang disebabkan oleh deinking secara kimia. Kertas koran bekas merupakan salah satu bahan yang dapat didaur ulang. Pemanfaatan ekstrak kasar lakase dari Marasmiellus palmivorus digunakan dalam biodeinking karena memiliki kemampuan untuk menyisihkan tinta. Penelitian ini bertujuan untuk mengetahui potensi ekstrak kasar lakase untuk meningkatkan nilai brightness (derajat cerah) dan menurunkan nilai Effective Residual Ink Concentration (ERIC) dalam proses biodeinking kertas koran bekas. Produksi ekstrak kasar lakase dilakukan dalam reaktor statis Solid State Fermentation (SSF) dengan substrat material lignoselulosik. Produksi ekstrak kasar lakase menghasilkan aktivitas tertinggi 1.142,86 U/L (8,33 U/mg). Perlakuan biodeinking dengan enzim ekstrak kasar lakase dapat meningkatkan nilai derajat cerah 15,22% (54,27 %ISO) sampai 25,03% (58,89 %ISO) dibandingkan dengan kontrol (47,10 %ISO) dan menurunkan nilai ERIC 46,12% (452,1 ppm) sampai 68,26% (266,4 ppm) dibandingkan dengan kontrol (839,2 ppm). Kata kunci:  biodeinking, Marasmiellus palmivorus, lakase, kertas koran bekas
Sari Pustaka Hendro Risdianto
JURNAL SELULOSA Vol 42, No 01 (2007): BERITA SELULOSA
Publisher : Center for Pulp and Paper

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25269/jsel.v42i1.185

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Sari Pustaka Hendro Risdianto
JURNAL SELULOSA Vol 41, No 02 (2006): BERITA SELULOSA
Publisher : Center for Pulp and Paper

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (142.277 KB)

Abstract

Sari Pustaka Hendro Risdianto
JURNAL SELULOSA Vol 41, No 01 (2006): BERITA SELULOSA
Publisher : Center for Pulp and Paper

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (137.904 KB)

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Co-Authors Chandra Apriana Purwita Rendana Saputra Sitatun Zunaidah Sri Harjati Suhardi