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INDONESIA
Seminar Nasional Teknik Kimia Kejuangan
Published by Universitas Pembangunan Nasional Veteran Yogyakarta
ISSN : -     EISSN : -     DOI : -
Core Subject : Science, Social, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Engineering Environmental Science
Prosiding Seminar Nasional Teknik Kimia Kejuangan adalah media online dari makalah yang telah diseminarkan pada acara Seminar Nasional Teknik Kimia “Kejuangan” (SNTKK). SNTKK merupakan agenda tahunan yang diselenggarakan oleh Program Studi Teknik Kimia FTI UPN ”Veteran” Yogyakarta. Seminar ini merupakan sarana komunikasi bagi para peneliti dari perguruan tinggi, institusi pendidikan, serta lembaga penelitian maupun industri, dalam mengembangkan teknologi kimia untuk pengolahan sumber daya alam Indonesia.
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Articles 65 Documents
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Search results for , issue "2023: PROSIDING SNTKK 2023" : 65 Documents clear
Pengaruh Morfologi Anionik Flokulan terhadap Performa Koagulasi Nira PG. Krembong PTPN X Lulu Sekar Taji; Erlangga Ardiansyah; Eva Oktavia Ningrum
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

The problem that occurs in Indonesia is the consumption of sugar that is greater than its production which causes the inability of the sugar industry to supply the demand of all consumers. One of the problems that occured is caused by the large number of raw materials that are still imported, including the flocculant used in this case, namely Anionic Polyacrylamide flocculant. Anionic Polyacrylamide (APAM) was first developed using an alkaline hydrolysis process. Until now, APAM manufacturing technology has undergone many developments. However, there are only few research conducted on Anionic poly flocculant (SA-co-A) regarding the influence of polymer properties and the efficiency of its use in the sugar refining process, therefore research was conducted on the influence of Anionic flocculant morphology on the coagulation-flocculation performance of sap at Krembong PTPN X sugar factory to reduce costs in the sugar production process. In this study, poly (SA-co-A) synthesis was carried out as a flocculant to be used in the sugar refining process. The steps used are adding acrylic acid, acrylamide and sodium carbonate which are then added with the NaOH solution. The next step is the synthesis of poly(SA-co-A), the synthesis process is carried out with a nitrogen atmosphere for 3 hours which has previously been added with ammonium persulfate. This study was conducted on the concentration ratio between acrylic acid and acrylamide which uses 40:60, 50:50, 60:40 variables. The resulting flocculants will be tested for flocculant FTIR test, flocculant SEM test, NMR test, settling speed test, mud volume test, pH test, TDS test, turbidity test on sugar’s sap to determine the effect of adding the flocculant. Based on the research that has been done, optimal flocculant performance was obtained, namely on the variable of poly(SA-co-A) 60:40 dose 2.5 ppm, whereas the results are almost equal or even better than commercial flocculant performance. With the removal percentage for the speed of precipitation and the volume of precipitation increases up to 4.5 and 2 times. Then for TDS and turbidity dropped to 14% and 86%.
Optimalisasi Regenerasi Dan Pemakaian Kembali Karbon Aktif Untuk Pemungutan Krom Dari Limbah Penyamakan Kulit Neni Rahayu; Joko Wintoko; Muslikhin Hidayat
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

In the wastewater treatment of leather tanning processes, commercial activated carbon from palm shells is usually used as an adsorbent. Therefore, a study is needed to evaluate the effectiveness of activated carbon that has been repeatedly regenerated and used as a total chromium adsorbent medium in wastewater. This study aims to examine the leaching process that uses acids and bases to analyze the adsorption and regeneration processes of activated carbon. Adsorption time variations of 30 minutes, 60 minutes, 90 minutes, and 120 minutes were used to evaluate how activated carbon interacts with wastewater. Then, the effluent was analyzed by Atomic Absorption Spectrophotometry (AAS) to determine the amount of total chromium remaining in the sample. The activated carbon which had been used as an adsorbent was contacted with 0.1 M H2S04 solution for 4 hours and stirred at 400 rpm using a magnetic stirrer to regenerate the surface of the activated carbon. It is neutralized with an alkaline solution. The Freundlich model is used to determine the value of the adsorption equilibrium constant. After testing 5 times, commercial activated carbon can still be used effectively as a adsorbent medium for total chromium (total Cr) repeatedly. Optimum adsorption contact time was 90 minutes. The optimum absorption efficiency during the fifth stage of the adsorption process was 43.93%.
Pengawetan Ekstrak Pewarna Alami dari Daun dan Kulit Buah Kakao (Theobroma cacao L.) Veni Tri Agustin; Edia Rahayuningsih; Aswati Mindaryani
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

Indonesia has abundant natural resources that are very potential and prospective as raw materials for natural dyes, one of which is the leaves and skins of cocoa pods (Theobroma cacao L.). The purpose of this study is to determine the concentration of preservatives that can effectively inhibit the biodegradation reaction of natural dyes in the extract of leaves and skins of cocoa pods. Extracts of natural dyes that have been centrifuged and preservatives was added, then stored in a closed reactor. The preservatives used are benzoic acid and chitosan. Extraction is carried out for 20 days. Every 2 days, extract was analyzed from the reactor to determine the colorant concentration using gravimetric method. Besides benzoic acid, the same experiments was also carried out on another chitosan dissolved in 2% acetic acid solution. The results showed that the addition of benzoic acid and chitosan dissolved in 2% acetic acid solution can inhibit the biodegradation of leaves and skins of cocoa pods extract. Preservative concentrations of 0.50% benzoic acid and 0.25% chitosan are effective preservatives to inhibit the biodegradation reaction
Pengaruh Kosentrasi Pencampuran Tepung Bonggol Pisang Termodifikasi untuk Pembuatan Mie Basah An Nisa Luthfi Nur Azizah; Hamid Hamid
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

Banana tuber flour is a type of non-wheat flour which has a high carbohydrate content so it has the potential to be processed into noodles. However, due to the low protein content and immature physicochemical properties, it is necessary to modify it enzymatically and mix it with wheat flour to obtain good quality noodles. This study aims to obtain enzymatically modified banana tuber flour with suitable characteristics for application in the manufacture of wet noodle products, as well as to obtain a formula (comparison of modified banana tuber flour and wheat flour) which can produce wet noodles that meet the SNI quality requirements. The treatment tested was enzymatically modified banana tuber flour substitution 10%, 20%, 30%, 40% and 0% were used as control variables. Wet noodle products were tested for water content and noodle organoleptic (smell, color and texture) according to SNI 2987:2015 wet noodle quality requirements. The results showed that the level of wet noodles met SNI standards, namely below 65%. The organoleptic test results showed that the best quality wet noodles were obtained from a combination of 10% modified banana tuber flour and 90% wheat flour with a concentration ratio of -amylase enzyme of 10%. The aroma test obtained a combination of 10% modified banana tuber flour and 90% wheat flour with a concentration ratio of -amylase enzyme of 40%.
Studi Recovery Tembaga pada Proses Froth Flotation dari Bijih Tembaga Papua, Indonesia dengan Variasi pH dan Konsentrasi Kolektor Ivano Heimbach; Himawan Tri Bayu Murti Petrus; Agus Prasetya; Arifudin Idrus; Daniel Timotius; Yuni Kusumastuti; Sutijan Sutijan
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

In the process of flotation of copper-bearing ore, several factors such as the concentration of the collector used and the pH of the fluid used can have an impact. In this study, observations were made on the influence of collector concentration and pH on the recovery of copper ores from Papua, Indonesia. The ore samples were obtained from three different site. Preparation of samples were conducted by crushing and sieving to obtain solid particles with a size of +200 mesh. The fine particles then fed into froth flotation device. Froth flotation operations were carried out at different operating condition namely pH (pH 3, pH 6, and pH 9), xanthate concentration (1300, 2000, and 2600 ppm), and time (3, 5, 7, and 14 minutes). The froth and tailings were collected separately and dried in an oven at 60oC. The feed, froth, and tailings were then subjected to EDX analysis to determine their compositions. The results of the experiment showed that higher collector concentrations did not necessarily lead to increased copper recovery. The appropriate pH conditions, however, could optimize copper recovery. The optimum conditions obtained from this experiment were xanthate concentration of 2000 ppm, pH of 3, and the ore sample 2
Pembuatan Biokompatibel Suture Anchor Berbasis 3D Printing Filament dari Nano Hidroksiapatit Berbahan Dasar Cangkang Keong Sawah Tesa Ulima Zhafira; Baskoro David Berlian; Achmad Dwitama Karisma
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

Suture anchor is used to attach soft tissues to the bone. One of the materials that can be used for making suture anchors is hydroxyapatite [Ca10(PO4)6(OH)2]. Hydroxyapatite (HAp)  has similarities with the properties of bone minerals, so it has the potential to be used as a material for making biocompatible suture anchors. However, HAp is brittle and has poor strength, so HAp is usually combined with polymers such as composites to overcome the limitations of its mechanical properties. One of the polymers that can be used is Polycaprolactone (PCL). In this study, HAp was synthesized from rice field snail shells, due to its high calcium contents.  Further, the combination of HAp and PCL in the manufacture of 3D printing filaments such as suture anchors was obtained. The variables used in this study were the mixing ratio of HAp:PCL in making filaments with a mixing ratio of 0.5:9.5; 1:9 ; 2:8. The results of various variables shows that the tensile strength most optimal composite in 7,3 % when mixing HAp:PCl is 0.5:9,5.
Analisis Pengaruh Variasi Debit Air (QL) dan Debit Gas (QG) terhadap Koefisien Transfer Oksigen (KLa) pada Performa Microbubble Generator Niesa Hanum Mistoro; Sri Puji Saraswati; Johan Syafri Mahathir Ahmad; Wiratni Wiratni
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

The domestic wastewater treatment plant is usually installed using anaerobic system which has the disadvantage for low conversion process and large volume required. While the effectiveness of aerobic system can be increased by high consumption of energy to supply the oxygen. This study investigates the performance of Microbubble Generator (MBG) for wastewater treatment. The MBG utilizes the hydrodinamics of wastewater flow in the nozzle to provide energy-saving aeration. In this study, the clean water non-steady state test method was selected to find the overall oxygen transfer coefficient (KLa). The experiment was conducted by increasing the concentration of Dissolved Oxygen (DO) using MBG installed with submersible pump (water discharge, QL=80 l/min) and variations of gas discharge (QG) (0.15 l/min and 0.30 l/min). The KLa average results on QL 80 l/min at QG 0.15 l/min showed 0.01996/min and at QG 0.30 l/min showed 0.02564/min. These results indicate that the greater gas discharge (QG) can produce a greater KLa value. This happens because the more air is injected into the water and forms into micro-sized bubbles, the greater the rate of transfer oxygen to the liquid phase.
Sintesis Asil Gliserol Melalui Reaksi Esterifikasi Asam Oleat dengan Gliserol Caesar Purnama Husada; Hary Sulistyo; Wahyudi Budi Sediawan
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

Acyl glycerol derivatives from oleic acid, especially monoacylglycerol (MAG) and diacylglycerol (DAG), are products that is widely used in the food, lubricant, and cosmetic industries. Acyl glycerol can be obtained through esterification reaction of glycerol with fatty acids.  This study aims to determine the effect of temperature on the conversion and amount of acyl glycerol produced. This research was conducted using a batch system with temperature variations of 80°C, 100°C, and 120°C with HCl 1%wt as catalyst and 1:1 reactant mole ratio (glycerol: oleic acid) for 2 hours reaction time. Samples were taken every 10 minutes, then the samples were analyzed using Thin Layer Chromatography (TLC) to determine the fraction of the product produced. The experimental results showed that increasing the temperature will produce higher conversions and acyl glycerols. The highest conversion of oleic acid occurred at 120°C (43.016%), with mole percentage of 1,796% monoacylglycerol (MAG), 3,820% diacylglycerol (DAG), and 5,813% triacylglycerol (TAG).
Bioconversion of Fruit Wastes into High Economic Value of Lipids using Heterotrophic Microalgae Aurantiochytrium from Mangrove Forests of Bunyu Island, North Kalimantan Suhendra Suhendra; Andri Hutari; Sekar Pratiwi; Hutri Puspita Sari
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

Aurantiochytrium microalgae is recognized as heterotrophic microalgae enables to produce high economic value of lipids for the use in health care industries. This research presents the production of biomass containing lipids through the bioconversion of fruit waste using Aurantiochytrium microalgae. Aurantiochytrium microalgae isolate was obtained from isolated mangrove leaves in the mangrove forest of Bunyu Island, North Kalimantan. The production process takes place in three stages, namely standing culture (SC), pre-culture (PC), and main culture. The SC and PC stages took place 48 hours respectively, while the MC took place 120 hours. The source of nutrition at the main cultivation stage (MC) used monosodium glutamate (MSG) as a nitrogen source, while the carbon source was from fruit waste. Amount of 250 grams of fruit waste was mixed and blended, added with 250 ml of water and then sonicated. The mass ratio of nitrogen source and carbon source was 1:3. The maximum of observed microalgal cell diameters for each stage were 14.5 μm (SC), 19.2 μm (PC) and 25.5 μm (MC). Produced biomass in this experiment has the characteristics of a yellow emulsion liquid, pH 6.2, fishy smell and total dissolved solids (TDS) of 4,820 ppm and a wet biomass of 68 g/l
Prediksi Kesetimbangan Cair-Cair pada Sistem Air + Asam Format + Pelarut Organik dengan Model UNIFAC Ahmad Hayiz Azaim; Farah Amirah Firyal Ramadhani; Saidah Altway
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

Formic acid can be produced by a fermentation process, producing an aqueous solution in the form of a fermentation broth. The separation of formic acid from water is challenging due to the presence of an azeotropic mixture. The aim of this research is to predict the liquid-liquid equilibrium data using the universal functional activity coefficient (UNIFAC) model for formic acid + organic solvent + water systems at 298.15 and 323.15 K and atmospheric pressure (101.3 kPa). The liquid-liquid equilibrium data are required as a reference for optimal design of formic acid extraction process. This research also introduces new two-phase systems for the separation of formic acid from aqueous solution and expands the scope of thermodynamic studies on formic acid extraction. The extraction performance was in the order of MIPK > 2-hexanone > MIBK. The temperature has no significant influence on the extraction performance. The prediction of formic acid + water + MIBK system at 298,15 K and atmospheric pressure (101.3 kPa) was also compared with the experimental data with the RMSD 9,76 %. This result represented that UNIFAC was a reliable model for the prediction of liquid-liquid equilibria of system involving formic acid.

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