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All Journal Industria: Jurnal Teknologi dan Manajemen Agroindustri Jurnal Agricultural Biosystem Engineering Journal of Biobased Chemicals (JOBC)
Maktub, Zana Azalia
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Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Medicine & Pharmacology Other

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Analisis Potensi dan Kelayakan Finansial pada Agroindustri Biogas Menggunakan Covered Lagoon Anaerobic Reactor Termodifikasi Sri Hidayati; Tanto Pratondo Utomo; Erdi Suroso; Zana Azalia Maktub
Industria: Jurnal Teknologi dan Manajemen Agroindustri Vol 8, No 3 (2019)
Publisher : Department of Agro-industrial Technology, University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (823.28 KB) | DOI: 10.21776/ub.industria.2019.008.03.6

Abstract

Abstrak PT Juang Jaya Abdi Alam (JJAA) Kabupaten Lampung Selatan adalah perusahaan peternakan sapi yang menghasilkan limbah kotoran sapi yang cukup besar (sekitar 198.000 kg per hari). Limbah kotoran sapi berpotensi untuk menghasilkan biogas yang memiliki nilai ekonomi. Salah satu reaktor biogas yang cocok digunakan di daerah tropis adalah Covered Lagoon Anaerobic Reactor (CoLAR). Model ini hanya berupa kolam yang diberi penutup kedap gas yang diberi pipa dan pompa. Penelitian dilakukan untuk menganalisis potensi dan kelayakan finansial agroindustri biogas limbah kotoran sapi di PT Juang Jaya Abdi Alam (JJAA) Kabupaten Lampung Selatan. Penelitian menggunakan metode telaah pustaka, pengamatan, analisis kuantitatif, dan diskusi dengan para pakar yang terkait agroindustri biogas limbah kotoran sapi. Hasil analisis menunjukkan bahwa PT JJAA memiliki potensi yang tinggi yaitu dari 9000 sapi mampu menghasilkan energi listrik untuk 203 pelanggan dengan daya listrik terpasang 1300 VA. Berdasarkan studi kelayakan secara finansial, agroindustri biogas layak dijalankan karena memenuhi kriteria kelayakan usaha, yaitu: Net Present Value (NPV) sebesar Rp77.353.897.714,- ; Internal Rate of Return (IRR) sebesar 42,52 %, nilai Net Benefit/Cost Ratio (Net B/C) sebesar 4,51 dan Payback Period selama 2,22 tahun. Hasil analisis sensitivitas menunjukkan bahwa kenaikan harga input sampai 23% menyebabkan proyek menjadi tidak layak.Kata kunci: agroindustri, biogas, studi kelayakan AbstractPT Juang Jaya Abdi Alam (JJAA) at South Lampung Regency, is a cattle-breeding company that produces a large amount of cow manure (around 198,000 kg per day). Cow manure has the potential to produce biogas that has economic value. Covered Lagoon Anaerobic Reactor (CoLAR) is a biogas reactor that suitable for tropics climate. This model is quite simple; only a pond that is given a gas-tight cover, pipe, and pump. The study was conducted to analyze the potential and the financial feasibility of cow manure waste-based biogas agroindustry in PT JJAA. The study methods used are literature studies, observations, surveys, and interviews with experts correlated to the development of biogas agroindustry for cow manure. The results of the analysis show that PT JJAA has a high potential of 9000 cows capable of producing electrical energy for 203 customers with installed electric power of 1300 VA. Based on a financial feasibility study, biogas agroindustry is feasible to run because it meets the business feasibility criteria, namely: NPV of Rp. 77,353,897,714; IRR of 42.52%, Net B/C ratio value of 4.51 and payback period of 2.22 years. The results of the sensitivity analysis show that an increase in input prices of up to 23% has caused the project to be unfeasible.Keywords: agroindustry, biogas, feasibility study
Penggunaan Electrical Impedance Spectroscopy (EIS) untuk Mengidentifikasi Kerusakan Mekanis pada Buah Apel Sugianti, Cicih; Maktub, Zana Azalia
Jurnal Agricultural Biosystem Engineering Vol 3, No 3 (2024): September 2024
Publisher : abe.fp.unila.ac.id

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jabe.v3i3.10157

Abstract

Mechanical damage is a common issue that affects the quality and marketability of apples during postharvest handling and storage. This study aims to identify mechanical damage in apples using Electrical Impedance Spectroscopy (EIS) as a non-destructive evaluation method. EIS measurements were conducted to analyze the electrical properties of both damaged and intact apples. Results showed that damaged apples exhibited lower extracellular resistance (7.8 kΩ) compared to intact apples (44.67 kΩ), indicating increased electrolyte leakage due to cell membrane disruption. Cole-Cole plot analysis further revealed significant differences in the impedance characteristics of apples, reflecting the extent of tissue damage. These findings demonstrate that EIS effectively detects mechanical damage by assessing changes in cellular integrity. The method provides a rapid, accurate, and non-invasive approach for quality control in apple handling and storage processes. Keywords: Apple, Cell Membrane Integrity, Extracellular Resistance, Electrical Impedance Spectroscopy (EIS), Mechanical Damage.
Pengaruh Variasi Persentase Campuran Arang Tempurung Kelapa dengan Batubara dalam Pembuatan Briket Biocoal Terhadap Sifat Fisik dan Laju Pembakaran Maktub, Zana Azalia; Sugianti, Cicih; Wibowo, Sasongko Aji
Jurnal Agricultural Biosystem Engineering Vol 3, No 4 (2024): Desember 2024
Publisher : abe.fp.unila.ac.id

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jabe.v3i4.10175

Abstract

This study aims to examine the effect of varying percentages of coconut shell charcoal mixed with coal on the physical properties and combustion rate of biocoal briquettes. The briquettes were made with four variations of coconut shell charcoal percentages: 16%, 31.9%, 47.7%, and 63.7%. The results revealed that briquette density tended to decrease with an increasing percentage of coconut shell charcoal, except for the 63.7% mixture, which showed an anomaly with higher density. Mechanical strength, including tensile and compressive strength, decreased as biomass increased due to the weaker mechanical properties of coconut shell charcoal compared to coal. The combustion rate decreased with higher biomass percentages, with longer combustion times for higher biomass content due to the higher calorific value of coconut shell charcoal. Biocoal briquettes demonstrated better combustion efficiency than regular briquettes but were still inferior to super briquettes and pure coal briquettes. This study highlights the potential of biomass-coal mixtures as an alternative, environmentally friendly, and efficient energy source. Keywords: Biocoal Briquettes, Coal, Coconut Shell Charcoal, Combustion Rate. Density.
Desain dan Optimasi Sistem CoLAR Termodifikasi dalam Pengembangan Agroindustri Biogas : Studi Kasus pada PT. Juang Jaya Abdi Alam Kabupaten Lampung Selatan ZANA AZALIA MAKTUB; S. Hidayati; TP Utomo; E. Suroso
Journal of Biobased Chemicals Vol. 5 No. 1 (2025): Journal of Biobased Chemicals
Publisher : Program Studi Teknik Kimia Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jobc.v5i1.5604

Abstract

Salah satu upaya yang dilakukan pemerintah dalam rangka mencapai swasembada daging sapi nasional adalah peningkatan usaha peternakan sapi. Namun, peningkatan usaha peternakan sapi selain memberikan manfaat juga menimbulkan dampak negatif yaitu limbah kotoran sapi yang tidak ditangani dengan baik dapat menjadi penyebab timbulnya pencemaran. Penelitian ini bertujuan untuk merancang dan mengoptimalkan sistem reaktor biogas berbasis Covered Lagoon Anaerobic Reactor (CoLAR) Termodifikasi dalam pengembangan agroindustri biogas sebagai solusi pengolahan limbah kotoran sapi melalui proses biologis anaerob dalam skala industri. Studi kasus dilakukan di PT. Juang Jaya Abdi Alam, Kabupaten Lampung Selatan, yang menghasilkan limbah organik sebanyak ±198.000 kg/hari dari 8.500 - 9.500 ekor sapi, yang sebagian besar limbahnya belum dimanfaatkan secara optimal. Metode yang digunakan dalam penelitian ini meliputi observasi, wawancara pakar, survei dan studi pustaka. Penentuan jenis reaktor dilakukan dengan Metode Perbandingan Eksponensial (MPE) berdasarkan aspek teknis, lingkungan dan finansial. Sistem yang dirancang terdiri dari unit pengenceran, pengadukan, pemisahan padat-cair (separator), serta reaktor anaerob dengan sistem pengadukan internal dan penutup geomembran HDPE. Hasil penelitian menunjukkan bahwa CoLAR Termodifikasi merupakan pilihan paling sesuai, dengan volume reaktor total 11.935 m³, produksi biogas sebesar 1.663,2 m³/hari, volume gas metan 1.092,72 m3/hari, dan potensi listrik 5.135,784 kWh/hari.
Pemanfaatan Jerami Padi Sebagai Bahan Campuran Briket Biocoal: Analisis Karakteristik Fisik dan Laju Pembakaran Dibandingkan Briket Konvensional Maktub, Zana Azalia; Tamrin, Tamrin; Lanya, Budianto; Kuncoro, Sapto
Jurnal Agricultural Biosystem Engineering Vol. 4 No. 2 (2025): June 2025
Publisher : abe.fp.unila.ac.id

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jabe.v4i2.11131

Abstract

This study aims to examine the effect of different percentages of rice straw as a blending material in biocoal briquettes on their physical properties and combustion performance. Four variations of rice straw content were used: 16%, 31.9%, 47.7%, and 63.7%. The results showed that briquette density decreased with higher rice straw content, from 765.13 kg/m³ at 16% to 466.34 kg/m³ at 63.7%. Mechanical strength also varied: tensile stress reached 100,109.99 N/m² at 16% and dropped to 85,480.03 N/m² at 63.7%, while compressive strength ranged from 71,902.06 N/m² to 62,909.68 N/m². Drop tests indicated that higher rice straw content generally reduced impact resistance. Combustion tests revealed that briquettes with higher rice straw content ignited faster and burned more quickly, with a maximum combustion rate of 2.81 g/min for the 63.7% mixture compared to 1.73 g/min for the 16% mixture. However, the calorific value decreased as rice straw percentage increased, from 4,968.53 kcal/kg to 4,011.97 kcal/kg, while moisture content rose from 26.40% to 37.93%. Analysis of variance (ANOVA) for combustion rate confirmed a significant effect of rice straw proportion (F = 10.93; BNT 5% = 0.2998). Compared to conventional briquettes, rice straw biocoal briquettes showed competitive combustion performance but slightly lower mechanical durability. This study demonstrates the potential of utilizing rice straw as an alternative biomass material to produce environmentally friendly biocoal briquettes with acceptable physical properties and enhanced combustion rates. Keywords: Biocoal briquettes, rice straw, density, tensile stress, compressive strength, combustion rate, calorific value.
Co-Authors Budianto Lanya Cicih Sugianti E. Suroso Erdi Suroso Kuncoro, Sapto S. Hidayati Sri Hidayati Tamrin Tamrin Tanto Pratondo Utomo TP Utomo Wibowo, Sasongko Aji