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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.
Arjuna Subject : -
Articles 89 Documents
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Search results for , issue "2016: Prosiding SNTKK 2016" : 89 Documents clear
Pretreatment Bonggol Jagung dengan Alkali Peroksida dan Hidrolisis Enzim H. Maria Inggrid; Reinaldo Wong; Herry Santoso
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2016: Prosiding SNTKK 2016
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Abstract

Corncobs are abundant lignocellulosic waste materials in Indonesia. Lignocellulosic biomass has the potential to be used as raw material to produce biofuel. Lignocellulosic material mainly consists of cellulose, hemicellulose and lignin. The convertion of lignocellulosic material to fermentable sugar involves pretreatment and  hydrolysis ( enzimatic saccharification ). The objective of this experiment is to optimize the operating condition of alkaline hydrogen peroxide pretreatment and enzimatic hydrolysis treatment to release fermentable sugar from corncob. In this experiment the effect of temperature and concentration of hydrogen peroxide ( H2O2) to lignin disruption by alkaline peroxide (AHP) pretreatment at pH 11.5 were studied. Under the optimum condition of alkaline hydrogen peroxide pretreatment ( 2% H2O2,  temperature of 35 oC,  pH 11.5, 12h )  and enzimatic hydrolysis treatment using cellusoft L. at 50 oC, pH 5, 12h, a total of 514.3 ppm glucose was obtained.
Polyesterification of Shellac as An Alternative Coating Material Lestari Hetalesi Saputri; Rochmadi Rochmadi; Budhijanto Budhijanto
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2016: Prosiding SNTKK 2016
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Abstract

Polyester resin is a type of polyester that is widely used in daily life, such as for paints, coating, composite matrix and so on. However, the widely used is a synthetic resin polyester. They have durable properties and extremely difficult to be degraded. While, the natural polyesters have weakness in their mechanical properties. This research aimed to modify shellac, one of natural polyesters, with phtalic anhydride in order to improve properties of coating material. The Addition of phtalic anhydride is expected to increase the hardness so that is not easily broken. FTIR analysis indicated the presence of esters and carboxylic acid groups, whereas the hardness test showed that polyester with a ratio of COOH/OH 0.7 had a higher hardness. The hardness level for polyester with the ratio of 0.7 was also reinforced by the degree of crystallinity shown by XRD analysis. It could be expected that modification shellac might be one of an alternative way to produce a material coating which is more environmentally friendly
Evaluation of Condensation Friction Pressure Loss Refrigerant 134-a in Internal Horizontal Tube Condenser by CFD Bambang Harjanto; Teguh Hady Ariwibowo; Fifi Hesty Sholihah
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2016: Prosiding SNTKK 2016
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Abstract

Energy crisis stimulates some efforts to empower low heat source. Organic Rankine Cycle is wise way that absorbs low heat gain easily. A device is horizontal condenser where two phase flow of R134a is happening in. Two phase flow is difficult to be solved due to its complexity. An annular flow regime dominates which is plotted as main assumption. It has plotted in Thome Flow Regime Map as variations of mass flux in similar vapor fraction. In CFD solver, flow is analyzed as pseudo, vapor and liquid mixed well, as consequence it will be single phase. It will be solved by SST method as viscous model that needs a multiplier numerical solver to transform from single phase into two phases. A multiplier depends on vapor fraction which is dominated of interfacial shear stress phenomenon as turbulent flow. Muller Steinhagen and Heck’s method is implemented due to its accuration. The value result of pressure loss correlates proportionally to mass flux. In similar mass flux, pressure loss increases as increasing linearly of vapor fraction due to high value of void fraction. The accuracy is within 91 %.      
Pengaruh pH dan Temperatur pada Ekstraksi Antioksidan dan Zat Warna Buah Stroberi H. Maria Inggrid; Albertus Reynaldi Iskandar
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2016: Prosiding SNTKK 2016
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Abstract

Indonesia is one of the tropical country that is potential to cultivate different types of plants, include strawberry. The use of synthetic dyes in foods are harmful to body health. Therefore, natural dyes can be used as alternative substitutes that can reduce harmful effects to the body. Dyeing capability of strawberry is caused by anthocyanin that gives red color. Furthermore, strawberry contains antioxidant that prevents free radicals in the human tissue. The purpose of this experiment is to study the effect of pH and temperature in the extraction of anthocyanin from strawberry towards total content of anthocyanin, antioxidant activity and total content of phenolic compound. The strawberry were extracted at the temperature variation of 5oC, 30oC and 60oC, and pH variation of 2, 7 and 12 respectively using water as solvent. The highest total anthocyanin content in the strawberry is 44.4mg/100grsample that obtained at 5oC  and pH of 2. The highest antioxidant activity and total phenolic content in the strawberry are 91.2% and 218.7 ppm respectively.
Ekstraksi dan Uji Stabilitas Antosianin dari Kulit Buah Naga Super Merah (Hylocereus costaricensis) Endang Kwartiningsih; Agatha Prastika K; Dian Lellis Triana
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2016: Prosiding SNTKK 2016
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Abstract

Natural food colorant is better for our healthrather  than synthetic food colorant. Based on that case, natural colorant is recommended. The natural colorant is potential to be extracted as anthocyanin from super red dragon fruit (Hylocereus costaricensis) peel.Super red dragon fruit has been processed to be food products such as syrup, cup drink, fermented drink, etc, but its peel generates waste.However, the peel contains of anthocyanin as an antioxidant that can be used for nutraceuticals. This research consisted of two steps. The first step was to determine optimum condition for the anthocyanin extraction from super red dragon fruit peel such as the variation of solvent, temperature, ratio of super red dragon fruit peel and solvent. The second step was to test the stability of anthocyanin at various pH, heating, oxidator, storage condition,sunlight exposure. Anthocyanin was extracted using batch extraction. The optimum variables were achieved at aquadest as solvent, 50oC, ratio substance and solvent 1:6 for 70 minutes extraction time.The anthocyanin extract from super red dragon fruit peel was stable at pH 4 and low temperature (10oC) storage. Red colorant from super red dragon fruit peel extract was not stable of  heating, contacting with oxidator H2O2, and sunlighting exposure
Sintesa dan Karakterisasi Biokomposit Material dari Biodegradable Polimer Poly L-Lactic Acid (PLLA) dan Selulosa Mayang Ayudhawara Subaghio; Hikmatun Ni`mah; Prida Novarita T; Sumarno Sumarno
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2016: Prosiding SNTKK 2016
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Abstract

Biodegradable biocomposites films made from a mixture of poly (L- lactide acid) (PLLA) and MCC (microcrystalline cellulose) with a weight ratio of MCC 0%;2.5%;5%;7.5%; and 10% by using solvent blending techniques. The aim of this study is to investigate the effect of MCC addition on the transparency, dispersion, thermal stability and mechanical properties of biocomposite products. The transparency of biocomposite films decrease with the addition of MCC filler dispersed in the PLLA matrix. The SEM results show that the more filler addition the more PLLA matrices that are filled by filler. Thermogravimetric analysis showe that the addition of MCC increase in thermal stability of biocomposites film. Most stable biocomposite film is reached by the composite with MCC content of 5 wt% with Tonset 309,35oC. Mechanical tests on biocomposite test include tensile strength and elongation at break. The value of tensile strength of biocomposite films decrease with the increasing MCC content, the highest value of tensile strength is 39 Mpa which is for neat PLLA. The elongation at break in the biocomposite films decrease with the addition of MCC, the highest value of elongation at break is 11% which is for neat PLLA
An Innovative Approach for Modeling Ultrasonic-assisted Drying Adiyta Putranto; Xiao Dong Chen
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2016: Prosiding SNTKK 2016
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Abstract

Drying is a simultaneous heat and mass transfer process which involves significant energy consumption. For sustainable processing practice, ultrasonic-assisted drying is often implemented. In order to assist in process design and optimization, a physically-meaningful drying model is useful. The REA (reaction engineering approach), which has been shown to be accurate to model several challenging drying cases, is implemented here to model the ultrasonic-assisted drying with various intensities. The relative activation energy (ΔEv,b) generated from one accurate drying experiment is used to model the ultrasound-assisted drying with various intensities. The results of modeling match very well with the experimental data. The REA is accurate to model the ultrasonic-assisted drying under various intensities (i.e. 8, 12, 21, 29 and 31 kW/m3). The mechanisms of ultrasonic-assisted drying can be explained well by the REA. A landmark for process intensification of drying process has been set up by the REA. The model can be readily adopted in industrial settings for process design and optimization.
Experimental Study of Heat Transfer Characteristics in The Hair-Pin Heat Exchanger Aulia Arif Shalihuddin; Teguh Hady Ariwibowo; Prima Dewi Permatasari
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2016: Prosiding SNTKK 2016
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Abstract

The heat transfer characteristics in the horizontal Hair-pin heat exchanger are investigated experimentally. Heat transfer coefficients were calculated and plotted with the experimental data. The inner and outer diameters of the inner tube are 10.67 and 12.09 mm. The inner tube is made from stainless steel with thickness 0.71 mm and the length of 500 mm with conductivity thernal 14.4 W/m.K. The outer tube is made from PPMA(polymethyl methacrylate) with thickness 2.27 mm and the length of 450 mm. Cold and hot water are used as working fluids in outer tube and inner tube, respectively. Flows in the inner tube and outer tube were counter flow. The mass flow rates were varied of cold water are 0.0167, 0.0194, 0.0222, 0.025 and 0.0278 kg/s. Reynolds number were got between of 1667 and 2776 in laminar flow to turbulent flow. Then, the results data of cold water are heat transfer 139,67 Watt for the lowest flowrate and 348,78 Watt for the highest flowrate. From the experimental results obtained heat transfer characteristics in Hair-pin heat exchanger, can be increased by varied the mass flow rate in cold side
Evolutionary Perspective of Sulfur Dynamics in Tomohon and Implications on Microbial Corrosion Frity Lisa Taroreh; Jubhar C Mangimbulude; Ferry F Karwur
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2016: Prosiding SNTKK 2016
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Abstract

Sulfur (S) is a non-metal, multivalent, tasteless and odorless element. The vast amount of sulfur valence (from S2- to S6+)allows such element to participate in various geochemical and biochemical processes. In nature, sulfur is everywhere, abundant and distribute evenly on earth and the solar system. On ‘ancient’ earth in anoxic atmospheric condition, sulfur existed in the form of H2S. In oxic period, following the discovery of photosynthesis, sulfur was commonly found in the form of sulfur oxides (SOx). This paper discusses the evolutionary perspective of sulfur by presenting and discussing three following aspects: (i) The formation ofsulfur element through “nucleosynthesis” that generating 4 sulfur isotopes with various abundances (32S= 95.02%; 33S = 0.75%; 34S = 4.21%; 36S= 0.02%), (ii) Geological record of ∆33S and sulphate dynamics in the atmosphere since 2,500,000,000-290,000,000 years ago as volcanic gas; and, (iii) The transformation of various types of sulfur compounds in oxic condition nowadays as SO2 , SO3, H2SO4, sulfite salt, sulfate salt, and organic sulfur aerosols.Special attention is given to the sulfur cycle and changing dynamics in nature related to volcanism in geological context of North Sulawesi, especiallyTomohon areas, and practical implication of microbiological corrosion is considered as the implication of the sulphuric evolution that affect the life of modern society.
Proses Start Up Produksi Bioetanol dari Tepung Sorghum Menggunakan Reaktor Anaerobik Berpenghalang Rosadela Lucky Artha; Ade Tia Suryani; Margono Margono; Mujtahid Kaavessina; Endah Retno Dyartanti
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2016: Prosiding SNTKK 2016
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Abstract

Sorghum bicolor grain is a potential raw material for bioethanol production. Sorghum bicolor grain contain a high starch, i.e. 65 – 70% by weight. This is much higher than cassava starch. The objective of this research is to produce bioethanol from Sorghum bicolor grain using Simultaneous Saccharification and Fermentation Process in Anaerobic Baffled Reactor (ABR) and biocatalyst of co-immobilisation yeast-glucoamylase. ABR is a reactor which has 4 compartment and has working volume of 2,5 L respectively. These experiments focused to study start-up process of the fermentation.. The start up was initiated with batch process for 16 hours followed by continuous fermentation in order to get steady process.  During start-up process showed increasing concentration of bioethanol and decreasing of reducing sugar as well as total sugar. The results show that the best ethanol concentration in start-up process were 1,277 g/L for compartment A, 1,572 g/L for compartment B, 1,69 g/L  for compartment C, and 1,454 g/L for compartment D at 19 hours of fermentation time.

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