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All Journal Jurnal Keteknikan Pertanian Tropis dan Biosistem Jurnal Teknologi Pertanian Sarwahita : Jurnal Pengabdian Kepada Masyarakat
Mujaroh Khotimah, Mujaroh
Universitas Brawijaya
Agriculture, Biological Sciences & Forestry Humanities Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Mechanical Engineering Social Sciences Other

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Effect of Ultrasound Frequency and NaOH Concentration on Bioethanol Steam Palm Pretreatment Process Sugiarto, Yusron; Mahfut, Luristya Nur; Rilek, Nada Mawarda; Atrinto, Ameiga Cautsarina Putri; Khotimah, Mujaroh
Jurnal Teknologi Pertanian Vol 15, No 3 (2014)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (643.312 KB)

Abstract

Lignocellulosic has promising material for bioetanol production. One of the abundant material is the stem of a Palm. Stem of palm is a plantation of palm waste which has not been utilized optimally which is contain high cellulose. Every year Indonesia produce palm stem of 300.375 ktons. This waste can be develop to produce bioetanol. However, pretreatment processes conducted some researchers still do not optmimal. This is related to the particle size and the method of pretreatment of less than optimal so that led to an overhaul of the lignin insufficient, consequently increased levels of cellulose was not significant resulting in low yield by bioetanol. Therefore, the research was implemented using the process of pretreatment method ultasonifikasi in order to produce higher pulp with nano-sized particles that will yield ethanol derived stem of palm is higher. Research methods used in this research composed of two factors, namely the concentration of NaOH and frequency ultrasonic waves that are each composed last 3 levels. The analysis conducted was the influence of the concentration of NaOH and time ultrasonikasi to increased cellulose pretreatment process using PSA, SEM and a Cheason. For the analysis of the results, data, and best treatment using ANOVA. The best treatment was obtained by combination of 9 (2 M NaOH konsentasi and sonikasi frequency 60 Hz) and lignin (19.6%) cellulose (59.49%) and hemicellulose (11.8%).Keywords: Bioethanol, pretreatment, ultrasound, stem of  palm
Desain Fungsional GREEN ROOF ALGAE Sebagai Media Kultivasi Mikroalga (Chlorella sp) dengan Nutrien Limbah Cair Industri Tahu Alexander Tunggul Sutan Haji; J. Bambang Rahadi Widiatmono; Khotimah Mujaroh
Jurnal Keteknikan Pertanian Tropis dan Biosistem Vol 6, No 1 (2018)
Publisher : Universitas Brawijaya

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Abstract

Dewasa ini banyak penelitian tentang pengembangan biomassa sebagai bahan biofuel, salah satunya adalah mikroalga. Penelitian tentang metode kultivasi mikroalga jenis Chlorella sp telah banyak dilakukan, metode kultivasi tertutup pada fotobioreaktor dan metode terbuka atau open raceway pond. Penelitian ini mengembangkan metode kultivasi mikroalga dengan media pemanfaatan lahan kosong non-produktif yang mendapatkan paparan sinar matahari yang cukup yaitu teknologi roof top. Tujuan dari penelitian ini adalah merancang GREEN ROOF ALGAE skala laboratorium berbasis resirkulasi terbuka sebagai media kultivasi mikroalga Chlorella sp dan mengetahui kemampuannya dalam proses kultivasi Chlorella sp. Metode penelitian ini adalah eksperimental. Parameter yang diuji adalah kelimpahan Chlorella sp dan analisis fungsional GREEN ROOF ALGAE yang meliputi kapasitas sebesar 22 Lt, tinggi prototipe 1 m, luas roof top 100 x 50 cm, debit pada roof top sebesar 0.320 L/s dengan δ~1mm, kemiringan α=30°. Hasil dari penelitian ini didapatkan kelimpahan Chlorella sp pada puncak populasi pada hari ke-7 sebesar 4010 x 104 sel/mL dengan laju pertumbuhan sebesar 2045 x 104 sel/mL, populasi mutlak ΔN=Nt- N0 sebesar 3740 x 104 sel/mL dimana t adalah hari puncak populasi. Sementara parameter pendukung yaitu kualitas air (medium kultur) setelah kultivasi didapatkan air dengan suhu akhir 24-25°, pH 7,1,kadar nitrat (NO3-) dan fosfat (PO43-) pada hari ke-5 yaitu sebesar 5,2 dan 2,67 ppm, dimungkinkan setelah hari ke-5 nitrat dan fosfat terus mengalami penurunan dan kembali mengalami kenaikan pada saat fase stationer dan kematian pada mikroalga.
PELATIHAN PEMANFAATAN SAMPAH ORGANIK RUMAH TANGGA MENJADI PRODUK ECO-ENZYM DAN TURUNANNYA UNTUK WARGA DI KELURAHAN GIRIPURNO BUMIAJI BATU JAWA TIMUR Haji, Alexander Tunggul Sutan; Khotimah, Mujaroh; Setyono, Langgeng; Atmaja, Hizkia Brian; Larasati, Nadhifah; Prabawa, Raullyno Ghozali Ilham; Azzahra, Shabrina
Bahasa Indonesia Vol 20 (2023): Sarwahita : Jurnal Pengabdian Kepada Masyarakat Vol. 20 Edisi Khusus Tahun 2023
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/sarwahita.20k.9

Abstract

Organic waste can be utilized in various products that have use value and are environmentally friendly, one of which is eco-enzyme. Eco-enzyme is a liquid produced from a fermentation process from simple ingredients, namely brown sugar or molasses, organic waste in the form of fruit and vegetable peels, and water in a ratio of 1:3:10 for 3 months. The purpose of this community service activity was to invite the active role of the Giripurno Village community in reducing the volume of waste produced by processing domestic organic waste into eco-enzyme products and their derivative products. The implementation of this activity was focused on three hamlets, namely Dusun Kedung, Dusun Sabrangbendo, and Dukuh Sawahan from May to August 2023. The forms of activity included interviews, socialization, joint practice, monitoring, and evaluation. The results of this activity achieved training and practice in making eco-enzymes and derivative products with the PKK women's community well and smoothly. The resulting derivative products were dishwashing soap, floor cleaning liquid, and liquid organic fertilizer. Evaluation of achievement was carried out by giving questionnaires after and before the training which contained the understanding and satisfaction of the participant. Based on the evaluation results, it was found that there was an increase in the level of understanding of participants in the three hamlets, namely Dusun Kedung from 70% to 95%, Dusun Sabrangbendo from 62% to 90%, and Dusun Sawahan from 55% to 90%. Abstrak Sampah organik dapat dimanfaatkan menjadi berbagai produk yang memiliki nilai guna dan ramah lingkungan, salah satunya adalah eco-enzym. Eco-enzyme adalah cairan yang dihasilkan dari proses fermentasi dari bahan sederhana yaitu gula merah atau molase, sampah organik berupa kulit buah dan sayuran serta air dengan perbandingan 1:3:10 selama 3 bulan. Tujuan dari kegiatan pengabdian masyarakat ini adalah untuk mengajak peran aktif masyarakat Desa Giripurno dalam mengurangi volume sampah yang dihasilkan dengan cara mengolah sampah organik domestik menjadi produk ecoenzym dan produk turunannya. Pelaksanaan kegiatan ini difokuskan pada tiga dusun, yaitu Dusun Kedung, Dusun Sabrangbendo, dan Dusun Sawahan selama bulan Mei hingga Agustus 2023. Bentuk kegiatan berupa wawancara, sosialisasi, praktik bersama, monitoring dan evaluasi. Hasil dari kegiatan ini tercapainya pelatihan dan praktik pembuatan ecoenzym dan produk turunan bersama komunitas ibu PKK dengan baik dan lancar. Produk turunan yang dihasilkan yaitu sabun cuci piring, cairan pembersih lantai, dan pupuk organik cair. Evaluasi ketercapaian dilakukan dengan memberikan kuisioner setelah dan sebelum pelatihan yang berisikan pemahaman dan kepuasaan warga. Berdasarkan hasil evaluasi didapatkan hasil bahwa ada kenaikan level pemahaman warga di tiga dusun tersebut, yaitu Dusun Kedung dari 70% menjadi 95%, Dusun Sabrangbendo dari 62% menjadi 90%, dan Dusun Sawahan dari 55% menjadi 90%.
Enhanced Cellulose Content in Microwave-Assisted Sulfuric Acid Pretreatment of Java Grass Cahyono, Agung; Khotimah, Mujaroh; Ashabi, Arman
Journal of Tropical Agricultural Engineering and Biosystems - Jurnal Keteknikan Pertanian Tropis dan Biosistem Vol. 12 No. 2 (2024): August 2024
Publisher : Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jkptb.2024.012.02.06

Abstract

This study investigated the enhancement of cellulose content in Java grass (Cyperus rotundus) through microwave-assisted sulfuric acid pretreatment. The research involved soaking Java grass in varying concentrations of H2SO4 (1.5%, 3%, and 4.5%) and subjecting it to microwave irradiation at 2450 MHz for different durations (25, 35, and 45 minutes). The results showed that the highest cellulose content of 43.61% was achieved with a 1.5% H2SO4 solution for 45 minutes, representing a 90.3% increase from the pre-treatment level of 22.91%. The microwave-assisted pretreatment effectively disrupted the lignocellulosic structure, reduced cellulose crystallinity, and increased biomass surface area, thereby enhancing enzymatic hydrolysis. However, an anomaly was observed in the lignin content, which increased from 14.3% to 36.65% post-treatment, likely due to errors in lignin determination and the formation of pseudo-lignin.
Co-Authors Agung Cahyono Alexander Tunggul Sutanhaji Ameiga Cautsarina Putri Atrinto, Ameiga Cautsarina Putri Ashabi, Arman Atmaja, Hizkia Brian Azzahra, Shabrina J. Bambang Rahadi Widiatmono Langgeng Setyono, Langgeng Larasati, Nadhifah Luristya Nur Mahfut, Luristya Nur Nada Mawarda Rilek, Nada Mawarda Prabawa, Raullyno Ghozali Ilham Yusron Sugiarto