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METANA

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Published by Universitas Diponegoro

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Articles 8 Documents

Search results for , issue "Vol 5, No 2 (2007): Desember 2007" : 8 Documents clear

PENGEMBANGAN PIRANTI LUNAK SISTEM PROSES BERSIFAT USER FRIENDLY DENGAN SCILAB (Open Source Software) Sasongko, Setia Budi
METANA Vol 5, No 2 (2007): Desember 2007
Publisher : Universitas Diponegoro

Abstract Requirement of software is necessary for the process system-computer simulation. ln reality, costly of software is one of restriction for the software development. However, the costly constraint can be solved using open source software such as Scilab and OpenOffice. The goa lof this article formulates user friendly program of the process system. Scilab program by Graphical User Interface (GUI) and interaction with Open Office-Cale for the data-base physical property. Scilab program has been listed in this article and algorithme of rhe program as the methodology has been presented in this article. Results of the simulation program indicate goodfinding for the process system. Â Kata kunci : scilab; open office, simulasi komputer; oss (open source sortuare), Antar Muka Pcngguna - Graphical User Interface (GUI).

MATHEMATICAL MODEL OF' GAULTHERASE INACTIVATION KINETICS FOR THE GAULTHERIN PRODUCTION FROM WINTERGREEN (Gaulteria fragantissima) Yulianto, Mohamad Endy Y; Hartati, Indah; yuniastuti, Ari
METANA Vol 5, No 2 (2007): Desember 2007
Publisher : Universitas Diponegoro

Abstract Wintergreen (Gaultheria fragantissima) is the source of the essential oil of wintergreen which is comprised predominantly of methyl salicylic. During this time wintergreen is not yet economically developed because of the lack of the cultivation technology. One of effort that is needed to be studied beside the cultivation tecnology andÂ the wintergren oil quality development is the product diversification. wintergreen comprised by far the highest concentration of both free salicylic and total salicylic acid which is expected of a plant known for the formation of the wintergreen oil, an essential oil consisting primarily of methyl salicylic. The concentration of total salicylate found in wintergreen is over 20 fold greater than the total salicylic concentration (salicylic and any derivates combined) found in Filipendula, and 100 fold greater than that found in Lemon Thyme. The active form of salicylic acid in wintergreen is Gaultherin. Gaultherin has many properties related to human health. Gaultherin consists of methyl salicylic conjugated to the disaccharide, primeverose. When plant tissues are disrupted the endogenous gaultherin is rapidly lost, presumably by enzymatic hydrolysis with the release of methyl salicylic. The problem is until this time there is not yet available an effective method for the gaultherin extraction. The difficulties faced on the gaultherin production are the fact that along the gaultherin extraction. and along with the disruption of the wintergreen tissue, the gaultherin is hydrolyzed into its individual components which are methyl salicylic and disaccharide. The alternative process for the gaultherin production from wintergreen is the gaultherin production process by enzyme inactivation andÂ extraction process in an inactivation extractor using a n organic solvent (alcoholic solvent extraction). This paper is intended to study the enzyme inactivation rate which is play an important role in the dimension determination of the process equipments. Enzyme inactivation can be describes as first orde reaction. The enzyme inactivation constant Â kp is the temperature, pressure, and water concentration function. The dependency, model of Â the temperature based on Arhenius type while the pressure dependencyÂ is based on Eyring equation. Â Keywords : gaultherin, inactivation. kinetics

MODEL DIAGRAM JANECKE KESETIMBANGAN FASA PADAT-CAIR PROSES TIPE SOLVAY UNTUK PEMBUATAN Na2CO3 DAN KCI DARI ABU SABUT KELAPA Wahyuningsih Wahyuningsih
METANA Vol 5, No 2 (2007): Desember 2007
Publisher : Universitas Diponegoro

Abstract Sodium carbonate and Kalium Chlorde are two major Chemical compound in industry such is glass, pulp, soap and paper industry. Sodium carbonate and kalium chloride can be produces simultaneously from coconut shell fiber as by solvay type process. The ash coconut shell fiber contain larger portion of Kalium carbonate (35-45%-b Dikaliumoxide). The Material used in the research were kalium carbonate , kalium bicarbonate sadium chloride, carbon dioxide , kalium chloride, sodium carbonate ,sodium bicarbonate and water. The research parameter were the solubility of the salts kalium carbonate sodium chloride, sodium carbonate ,kalium chloride, sodium bicarbonate and kalium bicarbonate. For the solid liquid phase equilibrium data the observation for K+-Nα+- CI- CO3 - -H2O system was conducted. 30-40C and for K+-Nα+- CI- HCO3 - -H2O system the observasion was conducted at 55-65C They also help to identify the separation boundaries , the condition of operation ,the lise of solids that are most likely to precipitate and many more. Information, the generated SLE-phase ,diagrams such as phase boundary data and saturation point data may be used to solve grapichally the mass balance equations is related to the operational pathson the phase diagrams, the temperature dependent phase boundaries and the solubility index it is possible to simultaneously design.analize and simulate both continous flow sheets wich crystallization operation and sequences of batch.operations. The Simultaneous graphical not only provides a visualization of the process operation, but also,provides very goods initial estimates for future simulations with rigorous model.Jancke diagram .from Na + K t – CI- HCO3 - -H2O system at 50 C has the crystallization field.while the widest crystallization field for the Na + K t – CI- HCO3 - -H2O system was obtained from process at 400C Keyword : Janecke diagram; proses solvey

SISTEM PENGOLAHAN LIMBAH GAS CIANIDA PADA INDUSTRI PESTISIDA STUDI KASUS PT. ALFA ABADI PESTISIDA - JAWA BARAT Supriyo, Edy
METANA Vol 5, No 2 (2007): Desember 2007
Publisher : Universitas Diponegoro

Abstract Â Pesticide industries produce substance to kill pest and weeds, therefore product,side product, raw Â material and its wastes are hazardous and poison. The main pollution from pesticides industries are air pollutant. According to property of the wastes, treatment wastes include combination of absorbtion, catalytic and condensation order to match with limiting value by government. After being treated, the component moritored i.e. CN was reduced from 10 mg/lt become 0.01 mg/lt Â Keywords : cyanide, pesticide industry. Â

REPAIR OF PROCESS EXTORTION OF CENTRIFUGAL OIL AND ADJUSMENT OF TECHNOLOGY IS PRECISELY UTILIZE AT INDUSTRY CHIPS EMPING GEPUK MELINJO DI KABUPATEN BATANG Abidin, Zainal
METANA Vol 5, No 2 (2007): Desember 2007
Publisher : Universitas Diponegoro

Abstract At the industry produce the chips emping gepuk melinjo conventional generally experience of the resistance at process extortion of oil because this process walk gravitationly with extortion time about 0.5 hour. Problems of arising out is oil conten in chips emping gepuk melinio still high about 15 %Â is while equipments of extortion of oil which have is not yet can operate in an optimal fashion ( leak is in gravitation with time of 30 minute). Â is so that needed by the equipments able to improve ; repair the process extortion of oil in chips emping gepuk melinjo fry. This matter will pursue in improvement of capacities produce the chips emping gepuk melinio. To increase product to be needed modify, equipments of extortion of oil, Â so that efiensi production can be boasted up and peaceful for the use it and also improve the chips emping product qualitv gepuk. As according to the clauses released by Departemen Kesehatan, oil content in food stuff fried by is less than 5%. because at high oil rate will quicken the process rancidity at food-stuff. Besides with high oil rate will be able to improve the cholesterol rate in blood. From the result of perception during extortion by centrifugal oil wringer, extortion time about 2 - 3 minute with oil content in chips emping gepuk under or less than 5 %, so that the result of chips emping gepuk yielded by seen drier and will improve the endurance. Â Keyword : Chips emping gepuk melinjo, centrifugal wringer,oil rate and extortion time.

PROSES PENGKELATAN MINYAK CENGKEH DENGAN ASAM SITRAT Silviana, Silviana
METANA Vol 5, No 2 (2007): Desember 2007
Publisher : Universitas Diponegoro

Abstract Â Clove leaf oil is essential oil produced by distillation of clove leaf. The oil is still dark color and low eugenol content, generally. It was caused by Fe content in the oil, so the oil has dark color. Furthermore, it needs to improve the value of clove leaf oil through chelating process with citric acid. The objective of research is to obtain the significant variable for content and volum response. The research conducts with initial Fe content, chelating process, and final analysis of Fe content. Analysis of Fe content uses Spectrofotometry. The research uses design of experiment: factorial design 24 with variables: citric acid concentration (1- 2%b), temperature (50oC â€“ 70oC), time (l - 2 hours) and stirring speed (300-600 rpm). Data treatment obtained using Design Expert software. The result shows that temperature and time are significant variable for decreasing Fe content. Decreasing of Fe content from initial content 22,98mg/L down to l,86 - 2l,26mg/L. Regresion model obtained is Eugenol =74,45 + 0,10325 temperature. However, absorbent concentration and stirring speed variables have significant influent for decreasing volume. The regresion model obtained is Fe content = 34,6075-(0,54775T)-29,0551+0,548Tt, where T Â is temperature and t is time of chelating process. Â Key word: clove leaf oi;Â chelaling;Â citric acid; Fe Â content Â

REKAYASA BIOKONVERSI LIMBAH CAIR INDUSTRI PANGAN MENJADI PLASTIK BIODEGRADABLE DENGAN MENGGUNAKAN LUMPUR AKTIF Wikanta, Deddy Kurniawan; Yulianto, Mohamad Endy; Arifan, Fahmi
METANA Vol 5, No 2 (2007): Desember 2007
Publisher : Universitas Diponegoro

Abstract Plastics waste has a negative effect on our environment. one effort to solve a Â problem exerted in plastic waste is by making a degradable plastic material. Polihidroksialkanoat (PHA) is one of biodegradable plastic material which is include in the polyester group. PHA can be completely degraded and hasÂ similar properties. with conventional plastic. The usage of liquid food industry waste is a good alternative for the production of PHA, since liquid waste of food industry comprise of organics substance such as C, H, O, N and Â S. The production of Polihidroksialkanoat (PHA) from liquid waste of flour industry, wasconducted in a of sequencing batch reactor (SBR).The objectivesÂ of this research are to study the effect of batch time in one cycle of sequencing batch reactor(SBR), to compare between short and ordinary cycle in SBR system to PHA accumulation and kind of PHA, to study optimum condition of producing PHA. The first experimen was done In time of less than 12 hours by using filling timeÂ variable and ratio of duration of Aerob and anaerob process. The constand conditions were ambient temperature and neutral pH (at the begining). The results shows that at running with time ratio of aerob:anaerob was 6:3 hours and aÂ same duration ofÂ feeding, the highest average PHA content was got at the run when filling step is in six hours anaerob with aerob breaking time. The feeding durationÂ also influence the PHA formation. the short feeding duration yielded the highest average PHA content. An average PHA 0.1838 g/gsel was yielded at two hours feeding duration Â Key Words :biodegradable:plastic:waste Â Â

MANFAAT LIMBAH BATANG JAGUNG DALAM PEMBUATAN PULP Kusumayanti, Heny; U, Karismawan P; Nila W, Tri Murti
METANA Vol 5, No 2 (2007): Desember 2007
Publisher : Universitas Diponegoro

Absract Existence of paper in human life is important, because paper has function to record science, commerce promotion, medium to extend opinion and idea, and etc. However substance of paper in this time is become thin. For that, we try making pulp from waste of cornâ€™s stem with use soda process and the tool is digester. The colour of product pulp is brown, but after the washing the colour pulp is shine brown because of impurity in the pulp is solute after been washed. The pulp is analyzing more further, between bleaching process, analyses of number permanganate, analyses grade of a cellulose, and grade of ash. The colour of product pulp after bleaching is white brown, grade of Î± cellulose 48.32%, grade of ash 8.8%, number permanganate 8.184. Â Key word : cornâ€™s stem, soda process, bleaching

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