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Nanik Astuti Rahman
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Jurnal ATMOSPHERE
Published by Institut Teknologi Nasional Malang
ISSN : -     EISSN : 27472272     DOI : https://doi.org/10.36040/atmosphere.v5i1
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology
Journal Atmosphere is an engineering journal focused on process engineering that covers heat and mass transfer, advanced materials, chemical reaction engineering, waste processing and management, biomass energy and renewable energy, thermodynamics, biochemistry, electrochemists, process planning and control, mixing and separation processes.
Arjuna Subject : Teknik Kimia (semua kategori) - Teknik Kimia (Lain-Lain)
Articles 5 Documents
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Search results for , issue "Vol. 2 No. 2 (2021): ATMOSPHERE" : 5 Documents clear
PENGARUH VARIASI JENIS LIMBAH SAYURAN (KUBIS, SAWI, SELADA) DAN KADAR EM4 PADA PEMBUATAN PUPUK KOMPOS DENGAN PROSES FERMENTASI anita; Setyawati, Harimbi; Sari, Sanny Andjar; Nathania, Devona; Zahwa, Nadila
jurnal ATMOSPHERE Vol. 2 No. 2 (2021): ATMOSPHERE
Publisher : Teknik Kimia ITN Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/atmosphere.v2i2.4102

Abstract

Traditional markets produce solid vegetable waste every day, including cabbage, mustard greens and lettuce as well as other vegetables in large quantities. Therefore, a proper technology needs to be applied to deal with the solid vegetable waste. The technology is the recycling technology, that is converting vegetable waste into compost which has more selling value and high use value as natural plant fertilizer without any chemicals. This study aims to determine the effect of various types of vegetable waste and levels of EM4 on composting by the fermentation process. The variables used were EM4 levels 2%, 3%, 4%, 5%, and 6% and the types of the solid vegetable waste used were cabbage, mustard, and lettuce vegetable waste. These materials were put into polybags. The anaerobic fermentation was carried out for 14 days, which every two days was checked for the temperature and pH level. The best analysis results for nitrogen content were obtained in the variety of mustard solid waste with a concentration of EM4 6%, which was 1.06%. The highest phosphorus content was found in the variety of cabbage solid waste with 5% EM4 concentration, which was 0.3%. while the highest potassium content was found in the variety of cabbage solid waste with EM4 concentration of 4%, which was 2.12%
PENGARUH VARIASI SUHU DAN WAKTU PENGERINGAN PADA PEMBUATAN ENZIM PAPAIN DARI EKSTRAK DAUN PEPAYA Nilna, Faidliyah Nilna Minah; Muyassaroh; Azizah, Wasiatul; Sabrina, Mala
jurnal ATMOSPHERE Vol. 2 No. 2 (2021): ATMOSPHERE
Publisher : Teknik Kimia ITN Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/atmosphere.v2i2.4287

Abstract

Papaya leaves have long been known as leaves that contain meat tenderizers. Papaya leaves can soften the meat because it contains papain which is one of the protease enzymes. In the fresh papaya leaves there is sap which contains 5.3% papain. Meat tenderizer in powder form is more practical and more durable. One of the papain enzyme powder drying methods that is considered appropriate to be applied in the ginger powder production process is the foam mat drying method. This study aims to examine the foam drying process on papain enzyme activity using tween 80 (foam agent) and maltodextrin as filler to help maintain foam consistency. The drying process was carried out by varying the drying temperature (50oC, 55oC, 60oC, 65oC, and 75oC) and drying time (2 hours, 3 hours, 4 hours, 5 hours and 6 hours). The results of the analysis showed that the highest enzyme activity reached 408.7 U/mL for drying at an operating temperature of 60oC with a time of 2 hours..
KARAKTERISTIK BIOMASSA DAUN BUNGA SEPATU MENJADI BAHAN BAKAR STERNO GEL Dewi, Rini Kartika; Muyassaroh; Jimmy
jurnal ATMOSPHERE Vol. 2 No. 2 (2021): ATMOSPHERE
Publisher : Teknik Kimia ITN Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/atmosphere.v2i2.4301

Abstract

Sterno gel of hibiscus leaves (Hibiscus rosa-sinensis L.) is an alternative energy source that can be used as fuel because it has non-volatile characteristics, during the combustion process it does not smoke, does not have soot and does not produce harmful and carcinogenic gas emissions and does not have any harmful gases. the impact of emissions on the environment, Inside the hibiscus leaf contains saponins, -sitosterol, stigmasterol, taraxeryl acetate and 3-cyclopropane and their derivatives which will dissolve in both water and ethanol and will form colloids in water. With this composition, the researchers used hibiscus leaf biomass as fuel for sterno gel, where in this study the variables were filtrate mass of hibiscus leaf :10,1 20, 30, 40,50,60 and 70 grams and mass of carbopol :1, 1.5, 2 and 2.5 grams. From the research, it was found that the best burning time was 60 grams of hibiscus filtrate mass and 2.5 grams of carbopol mass, which was 25.02 minutes with the resulting gas emission values ​​of NOx: 4 ppm, SO2: 3 ppm and H2S: 2 ppm. While the calorific value is 3500 calories.
PROSES MICROWAVE ASSISTED EXTRACTION (MAE) RIMPANG JAHE MERAH DENGAN VARIASI PERLAKUAN BAHAN DAN DAYA OPERASI Muyassaroh
jurnal ATMOSPHERE Vol. 2 No. 2 (2021): ATMOSPHERE
Publisher : Teknik Kimia ITN Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/atmosphere.v2i2.4313

Abstract

Minyak jahe diketahui memiliki berbagai fungsi dan mempunyai nilai jual yang cukup tinggi. Permasalahan utama yang dihadapi industri minyak jahe di Indonesia adalah bahwa minyak jahe dari Indonesia tidak dapat memenuhi persyaratan karakteristik mutu yang ditentukan pada standar internasional yakni putar optik yang bernilai negatif akibat dari rendahnya kadar zingiberene minyak jahe. Kecilnya komposisi zingiberene pada minyak jahe Indonesia dikarenakan pada proses destilasi konvensional, zingiberene mengalami degradasi thermal. Alternatif proses produksi minyak jahe yang ditawarkan adalah proses produksi minyak jahe menggunakan teknologi Microwave Assisted Extraction (MAE). Penelitian ini bertujuan menentukan kondisi optimum proses ekstraksi minyak jahe menggunakan teknologi MAE. Variabel pada penelitian ini meliputi daya dan perlakuan bahan. Hasil penelitian menunjukkan bahwa hasil terbaik diperoleh pada ekstraksi daya 300 Watt yaitu rendemen 2,01 % dan kadar Zingiberene 6,72 % sesuai dengan SNI 06-1312-1998. Minyak jahe hasil ekstraksi menggunakan proses MAE memiliki kadar Zingiberene yang lebih besar dari kadar Zingiberene yang dihasilkan dari proses ekstraksi dengan pemanasan konvesional.
REVIEW: TEKNOLOGI PEMBUATAN SORBITOL DARI TEPUNG TAPIOKA Defri, Ifwarisan; Irfansyah, Aditya; Sudarsono, Sukma; SAPUTRO, ERWAN
jurnal ATMOSPHERE Vol. 2 No. 2 (2021): ATMOSPHERE
Publisher : Teknik Kimia ITN Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/atmosphere.v2i2.4314

Abstract

Sugar alcohol or sorbitol is a derivative product of carbohydrates, namely glucose through the hydrogenation process with hydrogen gas. The glucose used comes from flour, because the carbohydrate content in tapioca flour is considered the highest compared to other flour ingredients. Before the hydrogenation process is carried out, tapioca flour is enzymatically hydrolyzed so that the starch is broken down into glucose. The process of making sorbitol can be done in two ways, namely the electrolysis reduction process and the hydrogenation process with the help of a nickel catalyst. This literature study aims to determine the technology for making sorbitol and its advantages and disadvantages, both in terms of product and process, so that it can be used as a reference in selecting processes in sorbitol manufacturing plants. The catalytic hydrogenation process has advantages, namely the resulting yield is greater and the operating costs are relatively cheaper. The catalytic hydrogenation process also has several disadvantages, namely that it requires good safety handling because it requires high pressure in the process.

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