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Muhamad Maulana Azimatun Nur
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Prodi Teknik Kimia UPN Veteran Yogyakarta"</span>. Jl. SWK. 104 Lingkar Utara Condong Catur- Yogyakarta (55283)
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Eksergi: Chemical Engineering Journal
Published by Universitas Pembangunan Nasional Veteran Yogyakarta
ISSN : 1410394X     EISSN : 24608203     DOI : https://doi.org/10.31315
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology
Eksergi is an open-access, peer-reviewed scientific journal that focuses on research and innovation in the fields of energy and renewable energy. The journal aims to provide a platform for scientists, researchers, engineers, and practitioners to share knowledge and advancements that contribute to sustainable development and energy transition. In addition to energy topics, the journal also accepts high-quality manuscripts related to, but not limited to, the following areas: Separation processes Bioprocesses related to food, energy, and environmental applications Wastewater treatment and resource recovery Process optimization and intensification Carbon capture, utilization, and storage (CCUS) Chemical reaction engineering and reactor design Life cycle assessment (LCA) and sustainability evaluation Process Design and Control Engineering Process Simulations Process System Engineering The journal welcomes original research articles, reviews, and short communications that demonstrate novelty, scientific rigor, and relevance to chemical engineering and interdisciplinary applications.
Arjuna Subject : Energi (semua kategori) - Energi Terbarukan, Keberlanjutan dan Lingkungan
Articles 6 Documents
 1 
Search results for , issue "Vol 17, No 1 (2020)" : 6 Documents clear
Pemanfaatan Serbuk Kayu Pohon Gayam (Inocarpus Fagiferus) sebagai Bio Adsorbent Penjerap Ion Logam Berat Pb(II) dalam Limbah Cair Tintin Mutiara; Jefri Dimas Aziz; Muhammad Gustav Irsack
Eksergi Vol 17, No 1 (2020)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v17i1.3095

Abstract

Tahitian chestnut (Inocarpus fagifer) was utilized as adsorbent to eliminate heavy metal ions in wastewater. In this research, Tahitian chestnut wood sawdust was chemical modified by alkali solution from potassium hydroxide and sodium hydroxide to enhance the adsorption capacity of the sawdust. Furthermore, the effect of pH solution and soaking time to the adsorption capacity of Tahitian chestnut wood sawdust was investigated. Based on the experiment data, it can be concluded that the kinetic of adsorption Pb(II) ions onto the adsorbent Tahitian chestnut wood sawdust was well illustrated by Lagergren 2 nd order mathematic model with the value of determination coefficient (R2 ) was 0,9496.
PREPARASI KARBON BERPORI DARI LIMBAH AMPAS KOPI SEBAGAI MATRIKS PADA PEMBUATAN SLOW RELEASE FERTILIZER Diana Diana; Nur Indah Fajar Mukti; Fakhri Fachreza; Irfansyah Irfansyah
Eksergi Vol 17, No 1 (2020)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v17i1.3097

Abstract

Urea is one of the fertilizers that are widely used in agriculture. However, the absorption efficiency of urea for plants is currently only around 30%. Therefore, to increase its absorption in plants it is necessary to control the release of urea by making it a Slow Release Fertilizer (SRF) fertilizer. The use of SRF is expected to control the release of nutrients according to the time and amount needed by plants. Natural material which has the potential as a matrix of SRF fertilizer is coffee grounds waste. This research produces carbon from coffee pulp waste which can be used as a matrix in the manufacture of urea SRF fertilizer. With the addition of a matrix of coffee carbon is expected to slow the rate of release of urea into nature. So that the process of absorption of urea into plants will be more leverage. Coffee pulp was pyrolysed with pyrolysis temperature variation (400 - 600oC) using ZnCl2 as activator. The iodine number value of coffee grounds carbon produced decreases with increasing temperature. The addition of carbon coffee grounds can inhibit the release of urea from 81.5% to 26% for 30 days.
Enhancing coal tailing quality by Flotation Method using Biosurfactant from Lerak (Sapindusrarak De Candole) Danang Jaya; Tunjung Wahyu Widayati; Refina Yuni Mustika; Halim Nur Aziz Suwardi
Eksergi Vol 17, No 1 (2020)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v17i1.3298

Abstract

Wasted from coal mining that mixed with the wasted of the coal washing product called Coals Tailing (CT) has a low calorific value,high sulfur and ash content. To upgrade its quality by increasing its calorific value and to reduce environmental pollution by reducing sulfur and its ashes, coal must improve from its impurities, one of which is to try with flotation method. Flotation is a process that describes solids that occur due to differences in surface properties (surface properties). The flotation process takes place in a system consisting of three phases, namely gas phase, liquid, and solid, which are interrelated to complete the appearance (with the help of flotation agent  /  surfactant)  so  that  discussion  occurs  between  the  hydrophobic  component  (waterproof)  and  the hydrophilic component (like water). The main objective of the research is to improve the quality of coals tailing (CT), by increasing the calorific value (reducing the content of sulfur, ash, and other impurities) using the flotation method, and using lerak (Sapindus rarak De Candole) as a surfactant. From this research show that an optimal conditions were obtained, at particle size of -80 / + 100 mesh, operating conditions at pH 6, calorific value increased from initially 3230,171 cal/gr to 5035,622 cal/gr, sulfur content decreased according to   the optimum condition reached 2026.08 mg /kg, and the ash content decreased from 54.61% to 33.9%. From the results of these research indicate, Lerak as a surfactant is is enhanced to improve the quality of Tailings Coal (CT) by flotation method.
Steam Distillation of Essential Oil from Lemongrass (Cymbopogon citratus) using Microwave Pretreatment Sri Wahyu Murni, Ir., MT; Tutik Muji Setyoningrum; Gogot Haryono
Eksergi Vol 17, No 1 (2020)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v17i1.3300

Abstract

Essential oils from lemongrass (Cymbopogon citratus) containing citral are very potential to be used in food and pharmacy industries. The process of isolating essential oils is still constrained by its low yield. In order to increase yield, in this research, isolation of essential oil by steam distillation method was carried out using microwave pretreatment. The results showed that pretreatment using microwave for 2 minutes had the effect of increasing yield up to 1.4 times compared to without pretreatment. The essential oil produced using microwave pretreatment had physical properties (colour, odor, density, and refractive index) similar to those without pretreatment. Composition analysis by GC-MS showed that essential oils extracted using microwave pretreatment and without pretreatment contain geranial (Ecitral or citral-a), neral (Z-citral or citral-b) and mircena as the main components.
Design of a Simple Pyrolysis Reactor for Plastic Waste Conversion into Liquid Fuel using Biomass as Heating Source Aditya Kurniawan; Bambang Sugiarto; Andri Perdana
Eksergi Vol 17, No 1 (2020)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v17i1.3080

Abstract

A design that emphasizes simplicity and cost-effectiveness is applied to the plastic pyrolysis reaction system to produce liquid fuel. The reactor is fabricated from the waste refrigerant tank. The energy source for pyrolysis is generated by the combustion of biomass pellets. Forced convection by an electric blower is utilized to enhance the combustion efficiency and thus increase the heating rate with the overall average temperature at 412 °C. The coiled pipe is employed as a condenser system with water as its cooling media. The quantity of liquid product is measured for a different mass of PET-type plastic waste feed, with a maximum value of 17.7% w/w of feed mass is obtained. The physical characteristic of the liquid product is then analyzed using standard methods. It is found that its characteristics have approached the specification of commercial liquid fuel in the domestic market, with a liquid specific gravity of 0.776 and a heating value of 46 MJ/kg.
PENGGUNAAN SERBUK ARANG AKTIF BIJI KELOR UNTUK MENURUNKAN KADAR NITRIT DALAM AIR Ana Hidayati Mukaromah; Rusda Abja; Fandhi Adi Wardoyo
Eksergi Vol 17, No 1 (2020)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v17i1.3291

Abstract

Nitrite (NO2 - ) is a compound that can distrupting oxyhaemoglobin process and causes body weakness, fatigue, and samnolen. Either to reduce nitrite value in the water is to use activated charcoal moringa seeds, because it countains 4-alfa-L-rhamnosyloxy-benzilisothiocyanate substances. This research aims to find out influence of activated charcoal concentrate and immersion time variant to the reduction of nitrites ion in the water. Research object was nitrite ion in 10 ppm concentrate, the immersion with activated charcoal moringa seeds with concentrate variant 9 ; 12 ; and 15%w/v, with 10 ; 20 ; and 30 minutes immersion time. Nitrite assay performed with specfotometry methods with griess reagent. From the research results, optimum wave length is 540 nm and time stability of initial nitrite value 10 minutes with initial 4,7794 ppm. Reduction lowest nitrite value in the water is 9%w/v concentrate in 10 minutes time, with the result 3,1816 ppm and highest nitrite value is 15%w/v concentrate (1,1862 ppm). So that, can be conclude there is reaction activated charcoal moringa seeds variant concentration and immersion time to reducting nitrite ions in the water.

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