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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. 4 No. 1 (2023): ATMOSPHERE" : 5 Documents clear
VARIASI KONSENTRASI PUPUK ORGANIK CAIR (POC) DAN RENTANG WAKTU PENYIRAMAN PUPUK TERHADAP PERTUMBUHAN TANAMAN PAKCOY (Brassica rapa. L) Ibrahim, Mukhamad Ilham; Daru, Diky Brilian; Hudha, Mohammad Istnaeny
jurnal ATMOSPHERE Vol. 4 No. 1 (2023): ATMOSPHERE
Publisher : Teknik Kimia ITN Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/atmosphere.v4i1.6600

Abstract

Liquid organic fertilizer (POC) is the result of a fermentation process of organic materials containing the elements N, P and K. The use of POC has a significant impact on plant growth including plant height, leaf width, plant weight. In this study using fertilizer concentrations of 0, 4, 8, and 12% POC to 1L of water, and fertilization time ranges of 3, 4, 5, and 6 days. From the research that has been done it can be concluded that the best variable is with a concentration of 8%. fertilization every 4 days obtained the value on the 28th day the plant height was 26 cm, the number of leaves was 14, the stem circumference was 25.8 cm, the net weight was 52 grams, but the growth in leaf width was on the 28th day with a concentration of 4% with fertilization every 4 days the optimal value is 14 cm.
QUALITY OF BIOBRIQUETS MADE FROM BAMBOO STEMS AND CABBAGE WASTE D.U., Soofiyah; K.P, Zhendika; Anggorowati, Dwi Ana
jurnal ATMOSPHERE Vol. 4 No. 1 (2023): ATMOSPHERE
Publisher : Teknik Kimia ITN Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/atmosphere.v4i1.6628

Abstract

Fossil energy reserves in the world are decreasing every year, while the need for energy continues to increase as the population and industrial sector increase. Thus renewal must be carried out as a breakthrough in anticipation of producing alternative energy to replace fossil fuels. Biobriquettes can be used as an alternative fuel which is expected to be able to overcome the (fossil) energy crisis, because it comes from cheap materials and uses simple technology. Bamboo can be used as a raw material for making biobriquettes because it contains high levels of cellulose and lignin, namely 42.4 – 53.6% cellulose and 19.8 – 26.6% lignin. On the other hand, there is a lot of vegetable waste which is an environmental problem, one of which is cabbage. This study aims to determine the best quality of biobriquettes in terms of the effect of compressive strength and variations in the composition of bamboo and cabbage. The method used in the manufacture of biobriquettes is carbonization. The variables used were the composition of bamboo: cabbage with a ratio of 40:60, 50:50, 60:40, 70:30, and 80:20, and the compressive strength variables were 50 bar, 70 bar and 100 bar. From the results of this study, it was found that the best mixing ratio of biobriquettes produced the highest calorific value in a mixture of 80% Bamboo: 20% Cabbage with a compressive strength of 100 bar, with a calorific value of 7116.35 cal/g, a moisture content of 0,3205%, an ash content 3.061%, volatille matter 0.268%, burning rate 0.0644 g/min, carbon content 96.3505%
DISTILASI UAP MINYAK KULIT LEMON (Citrus Limon) DENGAN VARIASI SUHU DAN WAKTU PRETREATMENT aurelia nabila fauzi; Darma, Muhammad Jiddan Ali; Muyassaroh
jurnal ATMOSPHERE Vol. 4 No. 1 (2023): ATMOSPHERE
Publisher : Teknik Kimia ITN Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/atmosphere.v4i1.6678

Abstract

Essential oils are often also referred to as Essential Oils, Etherical Oils, or Volatile Oils, which are compounds that are volatile and insoluble in water and have natural extracts from plants derived from leaves, flowers, wood, seeds, roots, as well as fruit skin. Lemon oil is an essential oil that is obtained from the distillation of lemon peel and is used as an aromatherapy oil to cure several disorders such as headaches and nausea. The main content of lemon peel oil is limonene, which is about 94%, besides that there are other compounds such as terpenes, sesquiterpenes, aldehydes (about 3.4-3.6 n-citronella citral) and esters (about 1% geranyl acetate). Steam distillation is a separation process to produce lemon peel oil which is separated by distillation, the steam is obtained by distillation which is carried out at 96 oC, for 1.5-2 hours. The variables used were pretreatment temperature: 30 oC, 45 oC, 60 oC, 75 oC, 90 oC and pretreatment time: 1.5 hours, 2 hours, 2.5 hours, and the best results obtained for lemon peel oil were for material treatment at 1.5 hours. with a temperature of 45oC with Limonene content of 36.714%, α-Pinene 2.678%, and yield 0.0659%.
ANALYSIS OF PROCESSING PALM OIL FRUIT INTO CRUDE PALM OIL AT PT. SEDJAHTERA INDO AGRO BUKIT AJONG FACTORY, SANGGAU DISTRICT Ma'sum, Zuhdi; Lorenza, Karolina Maret; Ratna, Kornelia
jurnal ATMOSPHERE Vol. 4 No. 1 (2023): ATMOSPHERE
Publisher : Teknik Kimia ITN Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/atmosphere.v4i1.6738

Abstract

An analysis of the production process needs to be done at PT. Sedjahtera Indo Agro PKS Bukit Ajong Factory. The method was determining the average, median, standard deviation, and variance free fatty acid content of production. Free fatty acid levels was titrated by 0.1N NaOH and Phenolphthalein as an indicator. The results of the analysis of 461 samples found that the average percent free fatty acid content was 3.76% with a median of 3.95. The variance value is 0.05 with a standard deviation of 0.17. The factors causing unstable levels of free fatty acids is due to non-continuous factory operations and frequent stoppages of operations. If that happens for a long time, the free fatty acid levels will increase as a result of the increase in temperature in the tank. However, the CPO produced still meets the SNI where the average FFA content per week is 2-5%.
THE INFLUENCE OF ADDING NUTRIENT ELEMENTS IN POC COMPOSITION ON ROOT AND LEAF GROWTH IN PAKCOY (Brassica rapa L.) PLANTS USING HYDROPONIC CULTIVATION SYSTEM Ady Dwi Tegar, Ahmad Nurul Hakim An Nasif; Sugiarto, Ady Dwi Tegar; Rahman, Nanik Astuti
jurnal ATMOSPHERE Vol. 4 No. 1 (2023): ATMOSPHERE
Publisher : Teknik Kimia ITN Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/atmosphere.v4i1.6759

Abstract

Planting with a hydroponic system is a technique for cultivating plants without using soil media, but instead using water as a medium for cultivating plants. So that planting with a hydroponic system can use narrow land. So a study was conducted with the aim of applying Liquid Organic Fertilizer (POC) with the Indonesian National Standard (SNI) in a hydroponic planting system by adding POC constituent nutrients to the growth of roots and leaves of mustard greens, by adding a dose POC concentration of 0%, 9%, 12%, and 15% by analyzing samples of 0, 7, 14, 21, 28, 35 days to obtain better growth of pakcoy vegetables. The best growth of pakcoy plant roots was obtained from a concentration of 15%, obtained a length of 18.75 cm. The best growth in leaf width of the oajcoy plant was obtained from a concentration of 0% or without POC, the leaf width was 5.75 cm.

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