Seminar Nasional Teknik Kimia Kejuangan
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Analisis Proksimat Berbagai Jenis Kacang-kacangan yang Tumbuh di Pulau Timor-NTT
No full textAlmost throughout Indonesia, bean/legume plants can grow well. In the province of East Nusa Tenggara,Timor island there are many local beans that grow wild or cultivated. Local beans in the island of Timor,mostly processed into jagung bose (traditional meal made from corn) . Not much variety of food types basedon local beans. This study aims to identify the nutritional value of local beans in the island of Timor. Themethod used is by measuring the content of proteins, carbohydrates and fats. From the analysis of theresults obtained, the beans with the highest protein are arbila merah (18.55%), the highest carbohydratesare arbila biji besar (76.16%), and the highest fat are arbila biji loreng (1.85%). The results of this analyzecould be a recommendation in the processing of beans-based food to increase the added value andcommunity nutrition
Life Cycle Assessment Proses Produksi Pulp dari Kayu Akasia (Studi Kasus: PT Tanjungenim Lestari)
No full textThe increasing global demand for paperand the opportunity for Indonesia to become one of the the top three players in the world pulp and paper industry tend to increase the capacity of national pulp production in the coming years.On the other hand the production process of pulp gives rise to the environment impacts such as increasing use of energy and environmental pollution. This study aims to do the environmental assessment of pulp production using Life Cycle Assessment by means of Simapro Software Version 8.0.3.14.As the object of the study we took a pulp production process using acacia wood as raw material that is undertaken by a pulp producer named PT Tanjungenim Lestari. The company is located in Muara Enim, South Sumatera, Indonesia. The results of the study show that the highest environmental impacts generated from the pulp production process include marine aquatic depletion and human toxicity resulted from chip preparation, digesting,and washing/screening processes
Peningkatan Kualitas dan Kuantitas Produk Elektroplating Melalui Perbaikan Kualitas Larutan Kimia di Bak Elektroplating dengan Filter Elektroplating
No full textSmall electroplating industry is a small industry that is widely available in the city of Semarang. The mainprocesses in the electroplating industry are located in the coating process. This process occurs in theelectroplating bath. The quality of the metal coating is highly dependent on the quality of the chemicalsolution contained in the electroplating bath. If the chemical solution has good quality, such as the solutionwas clear, there are no impurities, the quality of the coating is also good. If the quality of the chemicalsolution is not good, then the results of the coating are also inferior such as there are bubbles in the layer, orthere is dirt on the die so that the coating process must be repeated. This will add to the cost of productionand a coating time so that increases operational costs. To solve this problem we need a system that canproduce a chemical solution that has good quality, clear, and there are no impurities. This system is calledthe filter electroplating. Results of electroplating filter application showed to increase the quantity andquality of production. The production capacity increased by 30% per day. The production turnover up 35%and profits increased by 45%. The chemical solution becomes clear and does not contain impurities so thatthe coating results becomes good
ptimasi Proses Pengolahan Bambu Petung menggunakan Ekstrak Nabati dan Kimia
No full textBamboo construction industry is very significant contribution to the foreign exchange and employment. Their products in addition to meet the needs of the local market, also exported to foreign countries. Problems are often found in industrial products produced bamboo is susceptible to damage from destructive insects, so it will degrade the quality of the product. The main material used is petung bamboo (Dendrocalamus asper), and substance use preservatives clicking processing plant leaf extract babadotan (Ageratum conyzoides Linn) and neem (Azadirachta indica A. Juss), as well as chemical preservatives borax-boric ( 2: 3). The purpose of this research is to improve the quality petung against destructive insects. The activities include, sample test, manufacture extract solution preservative plant from leaf babadotan, and neem by extraction with a ratio of 1::8, then boiled until the solution of the remaining 50%, the concentration of the use of 1:1, while the borax-boric ratio (2:3) using 50 g / l. Processing is done by boiling for 2 hours and 4 hours, then the test sample testing moisture content, retention of preservative, and the value of damage.The results of the observation showed initial moisture content petung average of 28.96%, the value of the optimal retention of borax-boric preservative occurs at boiling for 4 hours, that’s is 0.3693 g / cm3, using a solution of babadotan and neem leaf extract, respectively each of 0.117 g / cm3 and 0.109 g / cm3, under these conditions showed no damage petung against destructive insects
Isolasi Alginat Rumput Laut Coklat (Sargassum sp.) menggunakan Jalur Kalsium Alginat
Get PDFAlginate has been widely used in industrial field because of its natural properties as gelling agent. Brownseaweed, especially Sargassum and Turbinaria as the alginate sources are widely grown in Indonesia; butunfortunately there has yet to be any alginate industry in Indonesia. Alginate content in Sargassum isconsidered quite large, about 35%, whereas alginate content in Turbinaria is only around 20-25%. In thisresearch, sodium alginate was isolated from dried brown seaweed (Sargassum sp.) which first passedthrough the acid treatment using 0,5%-b/v HCl and alkaline treatment using 0,5%-b/v NaOH. Extraction wasdone in batch, using 2%-b/v Na2CO3 solvent. The chosen post-treatment method was through the Ca-alginatepath with experimental design Reponse Surface Methods-Central Composite Design with 5 center point. Thevaried variable was the concentration of CaCl2 (0,11 – 2,09 M) and the ratio of CaCl2 solution/alginateextract (0,48 – 4,02 g/g). The result showed that higher concentration of CaCl2 increased the yield, viscosity,and ash content. As the ratio of CaCl2/alginate extract got higher, the viscosity had the tendency to decreaseand the ash content increased. Yield of the obtained sodium alginate powder was 6,95 -30,7%; 1,48 – 11,85cP viscosity; ash content about 18,46 – 52,65%; and water content around 6,14 – 8,32%. The optimumcondition was obtained at CaCl2 concentration of 1,02 M and the ratio of CaCl2/alginate extract about 2,01g/g with 27,72% yield, 11,38 cP viscosity, 19,56% ash content, and 6,14-8,32% water content of sodiumalginate
Penggunaan Mordan Akhir Terusi terhadap Hasil Celupan Kain Batik dengan Ekstrak Kayu Secang
No full textBatik cloth color durability is a prerequisite for improving the competitiveness of the product, as the number of consumer complaints on the subject. How many treatments that can be done to address and improve fastness, is to perform the process of perfecting the end of the fabric that has been dyed using the final mordant materials, namely “terusi” or cupric sulfate (CuSO4) .5H2O. The use of extracts of the wooden cup on a batik cloth, batik cloth produces the erosion resistance value is low, so it is rarely used in the singular in batik dyeing, but mixed with wood extract Cleaner or other materials, but the results did not show its true colors. The purpose of this activity is to improve the quality of batik cloth with increased power results dye color fastness. The materials used, namely cotton fabric primisima, silk fabric T56, wax batik, wood shavings cup, alum, and cupric sulfate, as for the procedure include, extract manufacture wooden cup (1:8), mordant early cotton cloth with alum, batik dyeing with extract solution wooden cup, then made the final refinement using variation cupric sulfate concentration, that is 15 g/l, 20 g/l, and 25 g/l, wax removing, and test color fastness. From the results of the test color fastness to washing, good value at terusi concentration of 25 g / l is 4-5, with a strong color intensity values (the most powerful), the wave had a value of 26 with a length of 0.6637
The Effect of pH to Drying Process of Colloidal Silica Using Flame Spray Combusto
No full textSpray drying widely applied in industry for drying the material because it has many advantages including capable to produce particle up to nanometer size, having a continuous process, and high purity. The method that we used in this research is Flame Spray Combustor. This research has the objective to synthesize particles of silica from waterglass and determine the effect of pH on particle silica produced. Analysis of SEM, XRD, and BET was conducted to determine the morphology, crystallinity, particle’s size, surface area and pore size of the silica particles produced. Morphology of silica is small spherical and has an amorphous structure. At pH 8 to 10 the size of silica particles increases with increasing pH, and at pH 11 the size decreases. The higher pH, the smaller surface area of silica particles produced. Meanwhile, the greater pH, the greater pore size of silica particles produced
Aplikasi Metode Perhitungan Hydraulic Flow Unit (HFU) dalam Penentuan Persebaran Permeabilitas pada Model Reservoir Statis
No full textAbstractPermeability in petrophysical analysis is one of the physical properties of rocks that determination productivity, reservoir in place, and fluid distribution in the reservoir. In this study, calculation for permeability distribution using the equation of crossplot between porosity and permeability from routine coredidn’t representative for S Field. Hydraulic Flow Unit (HFU) methodused to gave more representative distribution of permeability in static model.The method of calculated HFU on the S Field is divided into several methods such as : calculated HFU of routine core data (HFU Core), calculated HFU of routine core data and added with permeability and porosity from well test (HFU Core + Perm. Well test), calculatedHFU of routine core data and combined with oil rate from well test (HFU Core + Qo test), and calculatedHFU of routine core data and combined with cumulative oil production from each well (HFU Core + Np). Permeability distribution from HFU Method gave higher values of permeability for S Field than from single transformation (crossplot). The effect of calculated permeability distribution in static reservoir model with HFU method can be seen from oil in place. HFU Core + Np have better permeability distribution than other calculations. It can be seen from a comparison of oil in place (reserves of oil in the reservoir) between the calculation HFU Core + Np with single transformation (crossplot). Oil in place in the static model from the calculation with HFU Core + Npis 58.57 MMSTB while the oil in place with crossplotpermeability and porosity of routine core data is 46.88 MMSTB
Perbandingan Granular Starch Hydrolyzing Enzyme dengan Glukoamilase Pada Proses Sakarifikasi Konvensional Pati Casava untuk Memproduksi Etanol
No full textIn a conventional cassava starch is converted into dextrins using liquefaction enzymes at high temperatures(90–120°C) during a liquefaction step. Dextrins are hydrolyzed into sugars using saccharification enzymesduring a simultaneous saccharification and fermentation (SSF) step. Recently, a granular starch hydrolyzingenzyme (GSHE), Stargen 002, was developed that converts starch into dextrins at low temperatures (30°C) andhydrolyzes dextrins into sugars during SSF. In this study, cassava starch using GSHE enzyme was comparedwith glucoamylase of commercial saccharification enzyme. Cassava starch processes for GSHE andglucoamylase treatments were performed at the same process conditions except for the saccharification step(60°C). For GSHE and glucoamylase treatments, ethanol concentrations at 72 hr of fermentation were 12.3,12.8% (v/v), respectively. Sugar profiles for the GSHE treatment were different from glucoamylase treatments,especially for reducing sugar. During SSF, the highest reducing sugar concentration for GSHE treatment was8% (w/v), whereas for glucoamylase treatments, reducing sugar concentrations had maximum of 15% (w/v)