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All Journal Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Prosiding SENTIKUIN (Seminar Nasional Teknologi Industri, Lingkungan dan Infrastruktur) BUANA SAINS
Zuhdi Ma’sum
Program Studi Teknik Kimia Fakultas Teknik Universitas Tribhuwana Tunggadewi Malang
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Energy Engineering Environmental Science Industrial & Manufacturing Engineering Mathematics Physics

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 1 
REAKSI KINETIS PEMECAHAN MINERAL ILMENIT PADA SINTESA TiO2 DENGAN H2SO4 Zuhdi Ma’sum; Taufik Iskandar
BUANA SAINS Vol 9, No 2 (2009)
Publisher : Universitas Tribhuwana Tunggadewi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (215.522 KB) | DOI: 10.33366/bs.v9i2.240

Abstract

Titanium diokside (TiO2) is widely used in chemical industries, especially in ceramics industries. It could be produced by destructing of the ilmenite mineral with sulfuric acid. The design process of destruction needs mathematical modeling which is similar to heterogeneous system that involves both mass transfer and chemical reaction simultaneously. The reaction between the ilmenite mineral and sulfuric acid was conducted in a stirred-batch reactor. The ilmenite mineral and sulfuric acid were mixed in the reactor then it was closed. The reactor was heated and stirred at a certain stirring rate until desired temperature was reached. Samples were withdrawn every 10 minutes. The variables studied were the reaction temperature in the tange of 383 K and 403 K and the rate of stirring in the range of 60 and 125 rpm. There were two proposes models. The first model was a shrinking-core mixed chemical-dynamic regime model. The second model was a shrinking-core chemical regime model. Based on the results, the first model was the suitable model of the two models proposed for describing the kinetics phenomena of the destruction of ilmenite mineral with sulfuric acid. From this model it was obtained that the value of reaction rate constant (kr) could be approached by the Arrhenius equation, as the following; kr = 8,59.1019.e-44578/(RT), in which R is the gas constant and T is the absolute temperature. It was obtained that the value of mass transfer coefficient was not significantly influenced by the rate of stirring
OPTIMASI PROSES DESTILASI UAP ESSENTIAL OIL Zuhdi Ma'sum; Wahyu Diah Proborini
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 1, No 2 (2016)
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/rekabuana.v1i2.654

Abstract

Most of essential oils are produced using simple method steam destillation. The tool used in this reseach were made by a small workshop. This equipment can be used for distillation and condensation. But the best process that can be applied to this equipment is still unknow. The purpose of this study is to obtain the shortest processing time and optimization of production processes. This condition is achieved by decrease the rate of increasing temperature of cooling water. With the achievement of this conditions, the optimization of the essential oil distillation process in oil refining production system can be determined. The method used in this research is to reduce the temperature of the water out of the condenser using cooling tower.The best temperature decrease is obtained at A process with the difference in temperature of the cooling water at 1.5oC, 2.5oC, 3.5oC, 5.5oC. The decrease of increasing temperature of the cooling water can increase the capacity process through the addition of process. Optimization of processing time in 12 hours resulted repetition of the process at 4 hour by 3 times. With the cooling tower can reduce the rate of increase temperature in cooling water.Yield of Essential oils increase 29%.
PENGARUH KONSENTRASI GULA LARUTAN MOLASES TERHADAP KADAR ETANOL PADA PROSES FERMENTASI Agus Rochani; Susy Yuniningsih; Zuhdi Ma'sum
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 1, No 1 (2016)
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/rekabuana.v1i1.645

Abstract

The imbalance between supply and fuel needs led to the impact of the energy crisis. Bioethanol is an alternative fuel that has the potential to replace fossil fuels. Bioethanol is the result of fermentation of biomass ethanol with the aid of microorganisms. This study aims to determine the ethanol content is influenced by the concentration of the solution of sugar molasses, as well as determine how much sugar concentration in the most optimal fermentation of molasses (molasses). The fermentation process varied with the concentration of 12%, 14%, 16%, 18%, 19% and 20%. To determine levels of ethanol produced, then the measurement or test the ethanol content in each variable concentrations of sugar substrate by means of pycnometer. The results showed that the concentration of the solution of sugar molasses effect on levels of ethanol produced. The highest ethanol content obtained at a concentration of 18% sugar, amounting to 13.85%. Lowest ethanol content obtained at a concentration of 12% sugar, namely 4.56%, while the sugar concentration of 14% - 18% ethanol continues to increase in a row to 6.4%, 12%, and 13.85%. Cereviseae Saccharomyces fermentation activity declined at a concentration of 19% sugar and 20%, ethanol is converted decreased to 11.82% and 8.07%.
EKSPERIMEN DAN MODEL EKSTRAKSI MINYAK ATSIRI DENGAN BAHAN CYMBOPOGON SP. MENGGUNAKAN HIDROSTEAM DISTILLATION Zuhdi Ma'sum; Pramono Sasongko
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 2, No 1 (2017)
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/rekabuana.v2i1.665

Abstract

This work has as objective to modeled time extraction and yield of the citronella oil extraction processes from stems by hydrosteam distillation. The process variables evaluated in this study were extraction time, and material weight. The yield is calculated from the relation between mass essential oil obtained and the raw material mass used in the extraction and the quantitative and qualitative analyses of the oils were performed by capillary GC/MS. The experimental condition for the maximum yield, 0.36 %, is the following one: extraction time, 4 h, natural plant. The modeling of these results is proposed from the description of the mass transfer from a single plate particle. Yield curves for all studied conditions were fairly well fitted using one adjustable parameter of the model and the experimental monitoring of oil composition as function of extraction time was realized in laboratory steam distillation apparatus and compared with industrial scale results.
OPTIMASI PROSES DIFUSI UAP PADA DAUN SEREH DAPUR Zuhdi Ma'sum; Wahyu Diah Proborini
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 2, No 2 (2017)
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/rekabuana.v2i2.727

Abstract

This study aims to produce a model of household scale industries which are used in urban areas to pay attention to the efficient use of water resources, energy and land. Results of essential oils stored to determine the stability of the composition of the product citral essential oils are processed using steam distillation. Industrial model made from raw material supply of land is limited, the process is effective and efficient use of water and energy to economic analysis. The raw material used is the lemongrass or commonly called Lemongrass kitchen. Kitchen lemongrass plant is observed from planting to harvest right. The area required to sustain the process of production. Methods of planting lemongrass kitchen done naturally without any special treatment such as fertilization and pest control. Tools and processes developed is steam distillation. Engineering tools in order to get the process done the shortest and the least use of energy. A short process to obtain due to optimum cooling rate. Optimum cooling will reduce the processing time and minimize water usage. From the results of research in getting to the land area is 4 x 6m2 can generate lemongrass leaves the kitchen as much as 40kg. Essential oils are produced ± 120ml per day in 4 times long process with total process time 12h. The use of fuel by 12kg LPG per day with a volume of water use remain. With this process, this study managed to shorten the process that the effect of reducing energy and minimize water usage. The advantage that can be gained per day ± Rp310.000. In storage until 23bulan, citral percentage did not change with the level of 28% - 45%.
Pengaruh Konsentrasi Ragi dan Lama Waktu Fermentasi Terhadap Yield Bioetanol Ubi Cilembu Martha Susana Rischa; Zuhdi Ma'sum; Fikka Kartika Widyastuti
Prosiding SENTIKUIN (Seminar Nasional Teknologi Industri, Lingkungan dan Infrastruktur) Vol 4 (2021): PROSIDING SENTIKUIN
Publisher : Fakultas Teknik Universitas Tribhuwana Tunggadewi

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study aims to determine the effect of the amount of yeast and the length of time of fermentation on % yield of cilembu sweet potato bioethanol produced from the fermentation process. The stages of the research method include: sample preparation of cilembu sweet potato, hydrolysis process, fermentation process and bioethanol purification. Sample preparation was carried out by cutting, washing, drying and grinding. The hydrolysis process uses the acid hydrolysis method, namely 21% HCl. Yeast Saccharomyces cereviceae was used in the fermentation process with 5, 6, and 8 days of fermentation time and 5 grams and 6 grams of yeast mass variations. Meanwhile, the distillation method is used in the bioethanol purification process. Next, the percent yield of the bioethanol produced is determined. The results showed that the yield of bioethanol using 5 grams of yeast with each fermentation time was 5 days: 0.86%, 6 days: 1.94%, and 8 days: 0.97%. While the % yield of bioethanol used 6 grams of yeast each with variations in fermentation time of 5 days: 1.25%, 6 days: 1.69%, and 8 days: 1.6%. The highest bioethanol yield was found on day 6 with the use of 5 grams of yeast.
Co-Authors Agus Rochani Fikka Kartika Widyastuti Iskandar, Taufik Martha Susana Rischa Pramono Sasongko Susy Yuniningsih Wahyu Diah Proborini