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10 results on '"Khamil, Achri Isnan"'

1. Techno-Economic Analysis of Biogas Production from Cow Manure

Author

Maktum Muharja, Husnul Khotimah, Darmayanti Rizki Fitria, Prastika Andika, Khamil Achri Isnan, and Azhar Badril

Subjects
aspen, biogas, cow dung, energy, techno-economic analysis, Chemistry, QD1-999
Abstract

Biogas has been considered as a renewable alternative energy produced by anaerobic digestion of cow manure. A process of anaerobic digestion of cow manure was simulated by Aspen Plus software to analyze the cost of production. The simulated project used cow manure wastes as a feedstock. From the study, economic analysis includes Net Present Value (NPV), Internal Rate of Return (IRR), Payback period (PBP), and B/C Ratio. The resulting BEP value is 539.20, the NPV is 6,414,566,421.98, the IRR is 249.84%, and the B/C ratio is 1.66. These values can be said that the business of cow dung which is processed into biogas is feasible to run.

Published
2024
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7. Analisis Tekno-Ekonomi Produksi Gula Reduksi dari Biomassa Ampas Tebu Melalui Hidrolisis Air Subkritis

Author

Universitas Jember, Muharja, Maktum, Fadilah, Siska Nuri, Fadhilah, Nur, Darmayanti, Rizki Fitria, Widjaja, Arief, Khamil, Achri Isnan, Universitas Jember, Muharja, Maktum, Fadilah, Siska Nuri, Fadhilah, Nur, Darmayanti, Rizki Fitria, Widjaja, Arief, and Khamil, Achri Isnan

Abstract

Subcritical water hydrolysis of bagasse requires energy to convert lignocellulosic biomass into fermentation-ready sugars. Bagasse biomass has the potential to be used as raw material for the production of reducing sugar. This study evaluates the effectiveness of the hydrolysis process using an oven and autoclave through economic and energy analysis. The variables used were hydrolysis time of 20-60 minutes, oven temperature of 110-170°C, and autoclave temperature of 120-130°C. Reduced sugar concentration was obtained from analysis using the DNS (dinitro salicylic acid) method. The results of the analysis show that time and temperature have a significant effect on the yield of reducing sugar. The highest reduced sugar concentration from subcritical water hydrolysis using an oven was 27.4 g/L at 170°C operating conditions for 60 minutes with a total cost of Rp 351,744 and energy requirement of 480 W.h. In hydrolysis using an autoclave, it was obtained at 14.7 g/L at 125°C for 40 minutes with a total cost of IDR 923,079 and energy requirements of 1,936.67. Hydrolysis using an oven is more recommended than autoclaving because it is economical and has lower energy consumption.

Published
2023

8. Pengaruh Penambahan Chemical Agent Terhadap Angka Gula Reduksi Nira Perahan Pertama (NPP)

Author

PT. PG Candi Baru, Sidoarjo dan Universitas Jember, Fadilah, Siska Nuri, Musyafa, Reswara, Putri, Lutfi Nanda, Syahril, Dirgantara, Khamil, Achri Isnan, Muharja, Maktum, PT. PG Candi Baru, Sidoarjo dan Universitas Jember, Fadilah, Siska Nuri, Musyafa, Reswara, Putri, Lutfi Nanda, Syahril, Dirgantara, Khamil, Achri Isnan, and Muharja, Maktum

Abstract

One of the critical problems in the sugar industry is the high number of reducing sugars due to the inversion of sucrose in sugarcane due to the presence of Leuconostoc sp. This study aims to determine the effect and the optimum conditions for adding chemical agents to the number of reducing sugars in the first milking juice (NPP). The chemical agents used were benzalkonium chloride, sodium metabisulfite, and calcium hypochlorite with variations of 1, 2, 3, and 4 g/L. Analysis of reducing sugar (%GR) using the Lane-Eynon test method. The results showed that the addition of chemical agents had an effect on decreasing %GR of NPP, but at low doses there was an increase in %GR. The optimum point was reached when the addition of 3g/L benzalkonium chloride + sodium metabisulfite (BKC+SMB) was able to reduce %GR up to 2.16%. This condition has the potential to provide a net profit of sugar production of ±Rp. 14,056,000.00 per day. The use of BKC+SMB is a solution to reduce the number of reducing sugars and increase the yield value of the sugar industry.

Published
2023

10. Heat Exchanger Network Analysis of The Power Plant Industry Using Aspen Energy Analyzer Software.

Author

Muharja, Maktum, Widjaja, Arief, Darmayanti, Rizki Fitria, Airlangga, Bramantyo, Anugraha, Rendra Panca, Fauziyah, Mar'atul, Wijanarto, Eko, Sholehuddin, Mohammad, and Khamil, Achri Isnan

Subjects
HEAT exchangers, STEAM power plants, POWER plants, HEAT recovery, PINCH analysis, ENERGY consumption
Abstract

Heat recovery is considered as the key to improve energy efficiency in the process design. An appropriate heat exchanger network (HEN) design is an effective tool to maximize heat recovery from the process streams and to minimize energy consumption. The objectives of this study were arranging optimum HEN based on the annual cost in the power industry. HEN in the Paiton Steam Power Plant, East Java, Indonesia, was designed using spreadsheet and Aspen Energy Analyzer with Peng-Robinson equation. Pinch analysis was conducted by comparing Tmin (10°C - 19°C) to obtain Maximum Energy Recovery (MER) and Heat Exchanger Area (HEA). The HEN design was optimized using grid diagram. Simulation in this study succeeded to reduce the annual cost the most effectively at ΔTmin 16°C. This design optimized the process integration and contributed to the capital, operation, and total annual cost reduction of 14.3%. The maximum energy recovery was 286,706 kW and HEA 138.790 m². This result is a solution for Steam Power Plant as an effort for enhancing energy efficiency and the company competitiveness. [ABSTRACT FROM AUTHOR]

Published
2023
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