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All Journal Jurnal Keteknikan Pertanian Tropis dan Biosistem agriTECH JURNAL AGROTEKNOSAINS
Pangestuti, Martasari Beti
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Agriculture, Biological Sciences & Forestry Control & Systems Engineering Electrical & Electronics Engineering Energy Mechanical Engineering

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Potensi Limbah Cair Batik sebagai Sumber Bioenergi (Studi Kasus di UKM Batik Blimbing Malang) Nur Hidayat; Martasari Beti Pangestuti; Reny Nurul Utami; Sri Suhartini
agriTECH Vol 41, No 4 (2021)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (16.147 KB) | DOI: 10.22146/agritech.54099

Abstract

Batik merupakan salah satu produk kebanggaan bangsa Indonesia, yang umumnya diproduksi oleh usaha kecil menengah (UKM). Peningkatan permintaan batik mendorong adanya peningkatan jumlah UKM batik serta jumlah limbah cair batik yang dihasilkan. Masih banyak UKM batik yang membuang limbah cairnya langsung ke lingkungan yang berpotensi menimbulkan pencemaran pada tanah dan air. Hal ini disebabkan oleh belum adanya fasilitas pengolahan limbah yang memadai, sesuai dengan kondisi yang dialami oleh UKM Batik Blimbing Malang. Penelitian ini bertujuan untuk mengidentifikasi potensi pengolahan limbah cair batik secara anaerobik untuk memproduksi biogas sebagai sumber energi terbarukan. Pada penelitian ini digunakan teknologi anaerobic digestion yang dioperasikan secara batch dengan kondisi mesofilik (37 °C) tanpa pengadukan, dikenal sebagai uji biochemical methane potential (BMP) dengan waktu pengamatan selama 28 hari. Sampel yang diuji meliputi penambahan 100% limbah cair batik dengan berbagai variasi volume. Hasil penelitian menunjukkan bahwa limbah cair batik memiliki kandungan bahan pencemar organik yang tinggi, yaitu sebesar 8.651 mg/L (BOD) dan 54.700 mg/L (COD). Hasil uji BMP juga menunjukkan rendahnya biogas yang dapat diproduksi dari limbah cair batik. Kondisi ini disebabkan oleh beberapa faktor antara lain tingginya kandungan COD, ammonia, zat pewarna beracun, dan nisbah C/N yang berpengaruh negatif terhadap pertumbuhan mikroorganisme.
Characterization of Activated Carbon from Coffee Husk Using Potassium Hydroxide (KOH) as an Activator Putra , Tamam Athallah Rhely; Yunira, Eka Nur'azmi; Pratama, Borneo Satria; Witoyo, Jatmiko Eko; Pangestuti , Martasari Beti; Putra, Endo Pebri Dani; Nugraha, Aditya Wahyu; Devita, Wilda Harlia
Journal of Tropical Agricultural Engineering and Biosystems - Jurnal Keteknikan Pertanian Tropis dan Biosistem Vol. 13 No. 1 (2025): April 2025
Publisher : Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jkptb.2025.013.01.01

Abstract

Coffee husk is an agricultural by-product of coffee production, and its utilization is still limited. So, the study focuses on the potential of coffee husk to be turned into activated carbon. An essential step in producing activated carbon is activation, primarily performed using chemical solvents, such as potassium hydroxide (KOH). However, there are still limited studies on the effect of KOH concentration on the activation of charcoal from coffee husk. Therefore, the study aims to determine the impact of potassium hydroxide (KOH) concentrations on the characteristics of activated carbon derived from coffee husk. The KOH concentration ranges used to activate charcoal were 0 M (as control), 1 M, and 2 M, and were conducted using the completely randomized design (CRD) approach. The characteristics of the activated carbon were analyzed according to the SNI 06-3730-1995 standard, including moisture content, ash content, volatile matter content, and bonded carbon content. The results indicated that KOH concentration significantly impacted the characteristics of activated carbon derived from coffee husk.
Performa Adsorpsi Karbon Aktif dari Kulit Kopi untuk Menurunkan Asam Lemak Bebas (FFA) pada Minyak Jelantah Yunira, Eka Nur'azmi; Putra, Tamam Athallah Rhely; Pratama, Borneo Satria; Witoyo, Jatmiko Eko; Pangestuti, Martasari Beti
JURNAL AGROTEKNOSAINS Vol 9, No 1 (2025): Jurnal Agroteknosains
Publisher : Universitas Quality

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36764/ja.v9i1.1598

Abstract

Coffee husk-activated carbon is a promising biomass for use as an adsorbent due to its composition and abundance. This study aimed to analyze the performance of coffee husk-activated carbon in reducing the free fatty acid (FFA) content of used palm cooking oil. The study examined the effects of potassium hydroxide (KOH) concentration, adsorption time, and the mass of activated carbon. The activated carbon was produced through carbonization at a temperature of 300–400, followed by activation using 0 M, 1 M, and 2 M of KOH solutions. The results showed that the reductions in FFA levels at various adsorption times (2, 4, and 6 hours) were 24.219%, 33.828%, and 46.016%, respectively. The longer the adsorption time, the greater the reduction in FFA levels. In mass variations (0.1, 0.3, and 0.5 g) for 100 ml of used palm cooking oil, the reductions in FFA levels for 0 M, 1 M, and 2 M KOH-activated carbon were 40.234%, 47.968%, and 50.781%, respectively. The study found that increasing adsorption time and the mass of coffee husk-activated carbon resulted in lower FFA levels in used palm cooking oil. The highest percentage reduction in FFA levels, 50.781%, was achieved using 2 M KOH-activated carbon with a mass of 0.5 grams using and 6 hours for adsorption time. These findings suggested that coffee husk-activated carbon was a viable and sustainable adsorbent for improving the quality of used palm cooking oil, potentially reducing its environmental impact and enhancing its reuse potential in various applications.
Co-Authors Aditya Wahyu Nugraha Devita, Wilda Harlia Endo Pebri Dani Putra Jatmiko Eko Witoyo Nur Hidayat Pratama, Borneo Satria Putra, Tamam Athallah Rhely Reny Nurul Utami Sri Suhartini, PhD Yunira, Eka Nur'azmi