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INDONESIA
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia
Published by Universitas Tribhuwana Tunggadewi
ISSN : 25033654     EISSN : 25032682     DOI : -
Core Subject : Social, Engineering,
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Engineering Environmental Science Industrial & Manufacturing Engineering
Focus and Scope of this journal are : Chemical Engineering including : bioenergy processing, environmental engineering, natural resource management, Heat and Mass Transfer, Chemical Reaction, Analytical Chemistry, Biochemistry, Designing tools and chemical processes, Chemical industry process, Computing and modeling (simulation) process, Particle and nano technology, membrane technology, esessential oil technology, and phytopharmaca, etc. Civil Engineering including : technology of construction materials, transportation system, environmental layout, concrete and wood structures, steel construction, bridge and dam construction, management of water resources and Hydrology, earthquake engineering, sanitation systems and urban drainage.
Arjuna Subject : -
Articles 178 Documents
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Review Analisis Teknologi Degradasi Limbah Minyak Bumi untuk Mengurangi Pencemaran Air Laut di Indonesia Iffat Ganjar Fadhila Prakasita; Ria Wulansarie
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 3, No 2 (2018): EDISI SEPTEMBER 2018
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (665.701 KB) | DOI: 10.33366/rekabuana.v3i2.965

Abstract

Penentuan metode degradasi minyak bumi yang tepat sangat diperlukan untuk mengatasi pencemaran tumpahan minyak bumi khususnya di air laut Indonesia. Metode degradasi limbah minyak bumi yang digunakan adalah metode degradasi secara kimia dan biologi yaitu menggunakan surfaktan nonionik (Tween 80 dan Brij 35) dan bioremediasi menggunakan bakteri Pseudomonas aeruginosa.Variabel yang digunakan pada metode degradasi kimia dengan surfaktan nonionik adalah variasi konsentrasi 0.0000, 0.0025, 0.0050, 0.0075, 0.0100, 0.0125, 0.0150, 0.0175, 0.0200, 0.0225, 0.0250, 0.0275, 0.0300, 0.0350, 0.0400 % (v/v) dan variasi pengadukan untuk menguji stabilitas emulsi minyak bumi dengan laju 100, 120, dan 140 rpm selama 1 jam. Variabel yang digunakan pada metode bioremediasi adalah konsentrasi penambahan mikroba Pseudomonas aeruginosa sebanyak 0%; 1%; 3% (v/v), konsentrasi cemaran minyak bumi 1000 ppm dan 1500 ppm serta media aerasi dan media tanpa aerasi. Hasil degradasi minyak bumi terbaik didapatkan pada metode bioremeidasi menggunakan Pseudomonas aeruginosa dengan konsentrasi bakteri sebanyak 3% (v/v) pada media teraerasi dan konsentrasi cemaran minyak 1000 ppm dengan % biodegradasi TPH yang dicapai sebesar 100% dalam waktu 21 hari.ABSTRACTDetermination of appropriate petroleum degradation method is needed to overcome the contamination of oil spills, especially in Indonesia's seawater. The method of degradation of petroleum waste used is chemical and biological degradation method using nonionic surfactant (Tween 80 and Brij 35) and bioremediation using Pseudomonas aeruginosa bacteria. Variable used in chemical degradation method with nonionic surfactant is concentration variation 0.0000; 0.0025; 0.0050; 0.0075; 0.0100; 0.0125; 0.0150; 0.0175; 0.0200; 0.0225; 0.0250; 0.0275; 0.0300; 0.0350, 0.0400% (v / v) and stirring variations to test the stability of petroleum emulsion at rates 100, 120, and 140 rpm for 1 hour. The variable used in the bioremediation method is the concentration of Pseudomonas aeruginosa addition of 0%; 1%; 3% (v/v), the concentration of petroleum contamination 1000 ppm and 1500 ppm also aeration medium and aeration non medium. The best petroleum degradation results were obtained in bioremediation method using Pseudomonas aeruginosa with bacterial concentration of 3% (v / v) in aerated media and concentration of 1000 ppm oil contamination with TPH biodegradation achieved at 100% within 21 days.
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%.
KAJIAN KOEFISIEN UPAH KERJA PEKERJAAN PEMASANGAN BATA RINGAN PADA PEMBANGUNAN GEREJA KRISTEN INDONESIA BROMO KOTA MALANG Suhudi Suhudi; Reynold J. A. Telnoni
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 3, No 1 (2018): EDISI MARET 2018
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/rekabuana.v3i1.913

Abstract

In a construction project either in the planning, implementation and supervision of construction management indispensable good. It is intended that a project can run well, with cost-efficient and can be implemented on time. The method of implementation is an important part in the implementation of a project. What is important is the coefficient of wages as this will greatly affect the welfare of the workers. The determination of the coefficient of wages must be referring to the Indonesian National Standard (SNI). Light brick is a material that is widely used today. However, SNI has not been set on the coefficient of light brick work itself so that the implementation of the field is still used coefficient of wages for work of red brick. Calculating the coefficient of wages is by dividing the daily work volume and number of employees as a factor denominator. From observations made on the installation work light brick building Gereja Kristen Indonesia Bromo, the method used is correct. From the analysis of the data for wage coefficients obtained total wage employment lightweight brick installation methods SNI Rp 76.12 million, while total wages fact the field installation of light brick Rp 63.106 million, and based on research wages brick work lighter by Rp78.955 million, For the cost/m2 installation of lightweight brick according to SNI is Rp 29909.88. While the value of wage employment per m2 installation of lightweight brick according to the reality on the ground is Rp 24797.08 difference between the two comparisons is Rp 5112.8. Cost saving light brick work execution reached 17%.
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%.
PERENCANAAN DINDING PENAHAN PASANGAN BATU KALI PADA SUNGAI CELAKET DESA GADING KULON KECAMATAN DAU KABUPATEN MALANG Suhudi Suhudi; Kiki Frida Sulistiani; Andreas Andreas
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.v2i2.726

Abstract

Problems landslides are common in Indonesia , especially during the rainy season which resulted in an increase in the volume of water, soil conditions become unstable, this often creates victims of both fatalities and casualties material. One of the locations with frequent landslides in Residence of Malang. One of the ways used to control stability of the land so as not to slide is to build a retaining wall. Planning retaining wall is located on the River Celaket, Gading Kulon village, subdistrict Dau, Malang. In this plan, the data is taken directly through laboratory tests in soil mechanics laboratory civil engineering Tribhuwana Tunggadewi Malang University. The type of planned retaining wall is gravity type. In order to the building can be function properly, then the stability of the building must also be planned as best as possible, therefore, The stability of the retaining wall analyzed to the danger of rolling (bolting) and sliding in normal water conditions without the earthquake, dwite the earthquake and flood water level conditions without the earthquake, with earthquakes Analyzed using the Rankine formula. The result is SFsliding 1,81 1,5 dan 1,32 1,2, SFbolters 2,07 1,5 dan 1,36 1,2 (for normal conditions without and with earthquake) dan SFsliding 2,11 1,5 and 1,49 1,2 SFbolters 2,10 1,5 dan 1,26 1,2 (for flood condition without and with earthquake), it turns out safely. This study also included with the method of exercising the work used a system of mutual assistance or nongovernmental and calculate the budget plan, which totals Rp.340.503.000
Optimalisasi Proses Karbonisasi Limbah Plastik Menggunakan Teknologi Teknologi Pyrolisis Menjadi Briket Arang (Briquette Charcoal) Heny Adisansury Malo; Taufik Iskandar; Susanti Konga Wandal; Dina Trisak Diah
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 3, No 2 (2018): EDISI SEPTEMBER 2018
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/rekabuana.v3i2.1019

Abstract

Limbah plastik adalah salah satu sumber pencemaran lingkungan hidup yang meningkat setiap tahunnya seiring dengan pertumbuhan penduduk namun belum dapat memberikan nilai ekonomis bagi masyarakat. Tujuan penelitian ini adalah mengubah limbah plastik menjadi briket arang (Briquette charcoal) sebagai bahan bakar alternatif dengan cara dikarbonisasi/diarangkan menggunakan reaktor fast pirolisis pada suhu 400ᵒC ; 500ᵒC ; 600ᵒC selama 30 menit ; 45 menit ; 60 menit hingga menghasilkan arang. Arang plastik yang telah terbentuk dicampur dengan perekat amylum dengan konsentrasi 5% ; 8% ; 11% serta dicetak dengan alat hydrolic press. Hasil analisa yang  diperoleh, nilai kadar abu (1,26%), kadar air (0,0098%), volatile matter (1,37%),  fixed carbon (97,43%) dan nilai kalor (7.399 kkal/kg). Berdasarkan hasil analisa statistik, maka kondisi operasi optimal pembuatan briket arang plastik (Plastic briquette charcoal) yaitu pada suhu 600ᵒC selama 60 menit dengan konsentrasi perekat 5%.Kata kunci: Limbah plastik, briket arang plastik, bahan bakar alternatif, fast pirolisisABSTRACTPlastic waste is one of the sources of environmental pollution that increases every year along with population growth but has not been able to provide economic value to the community. The purpose of this study was to convert plastic waste into charcoal briquette (Briquette charcoal) as an alternative fuel by carbonized/fabricated using a fast pyrolysis reactor at a temperature of 400ᵒC ; 500ᵒC ; 600ᵒC for 30 minutes ; 45 minutes ; 60 minutes to produce charcoal. The formed plastic charcoal is mixed with amylum adhesive with a concentration of 5% ; 8% ; 11% and printed with a hydrolic press. The results of the analysis were obtained, the value of ash content (1.26%), moisture content (0.0098%), volatile matter (1.37%), fixed carbon (97.43%) and heating value (7,399 kcal/kg). Based on the results of statistical analysis, the optimal operating conditions for making plastic briquettes charcoal are at 600 on for 60 minutes with an adhesive concentration of 5%.
OPTIMALISASI PENGGUNAAN ASAP CAIR DARI TEMPURUNG KELAPA SEBAGAI PENGAWET ALAMI PADA IKAN SEGAR Sinar Abrina Anggraini; Susy Yuniningsih
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.v2i1.660

Abstract

During this cooling fish handling is only done by fishermen because it is considered the most effective. But with the rise in fuel prices, the purchasing power of ice fishermen has become even more severe, so the need to find alternative ways of preserving fish that is inexpensive, easy to obtain and have a noticeable effect on the quality of fresh fish as well as safe for the preservation of fresh fish. Liquid smoke technology is an effective potential to help maintain the quality of fresh fish with coconut shell as raw materials. The purpose of this study was to obtain the optimum moisture content of the length of time drying the coconut shell into liquid smoke.This research used an experimental method with long time drying the coconut shell. This study begins with cleansing, enumeration, and drying coconut shell for 0 day, 1 day, 2 days, and 3 days. Then do the pyrolysis process until the process redestilasi and filtration column. Results of liquid smoke grade 3 and grade 1 was analyzed by GC-MS and LC-MS. Treatment on fresh fish is done using a variable length of time drying the coconut shell and the results conducted organoleptic tests include color, aroma, texture and taste.The result of this research is a long time optimal drying for 3 days, with a water content of 1.96%, 6.25% acid concentration, and pH value of 1.9. While the magnitude of the yield of 35.8% at 0 days
ANALISA KOMPOSISI MINYAK ATSIRI KULIT JERUK MANIS HASIL EKSTRAKSI METODE MICROWAVE HYDRODIFFUSION AND GRAVITY DENGAN GC-MS Ayu Chandra Kartika Fitri; Wahyu Diah Proborini
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 3, No 1 (2018): EDISI MARET 2018
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/rekabuana.v3i1.918

Abstract

This study aims to determine percent yield and chemical composition of volatile oil from citrus peel that extracted by using Microwave Hydrodiffusion and Gravity method. Chemical composition was analyzed using Gas-Chromatography method. Based on gas chromatography analysis (GC) obtained 9 peaks with different retention time according to the type of compound that was analyzed. The highest peak comes with retention time of 8.440 with wide area 22623980 (97,78%) and height 7241224 (96,70%). Height is the distance from the base line to the maximum peak usually in mm, while the area is the area under the peak, and indicates the abundance of a component. Retention time is the time interval required by the solute (component) to get out of the column and reach the detector.
PEMBUATAN SALURAN KELILING UNTUK MENGATASI BANJIR (Studi Kasus Perumahan PNS Kota Tarakan, Kalimantan Utara) Kiki Frida Sulistyani
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.v1i2.650

Abstract

So far we know making a ring road outside the city or county to mengartasi traffic density on roads in urban areas. To address the housing PNS flooding caused by the availability of water from surrounding areas due to the location of residential housing in the river valley, then in fashion channel surround housing. Given the rapid development in the town of Tarakan, the manufacturing channel surround using the C = 0,5 assuming land use layout around PNS housing has become a residential areal. This meant that the planned channel can still be used to the area around the housing PNS into a residential area. Calculation results show precipitation method Log Pearson type III at Q = 162 459 mm 10 th and 25 th Q = 183 888 mm. The area around the housing PNS affecting the flood housing PNS is divided into 7 sub-watershed. Channel calculation using trapezoid channel 2 alterbatif namely the pair of stone and concrete vertical channel. Dimensional calculation results obtained from the largest channel for vertical channel B = 5.0 m and H = 2.5 m.
POTENSI PLTMH (PEMBANGKIT LISTRIK TENAGA MIKRO HIDRO) DI KECAMATAN NGANTANG KABUPATEN MALANG JAWA TIMUR Ikrar Hanggara; Harvi Irvani
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.v2i2.731

Abstract

Ngantang part of Malang Regency, located at an altitude between 500-700m above sea level. Judging from the topographical conditions, the potential energy of the water used as a source of energy for the MHP in this area is very high. To be able to calculate the potential energy of MHP good electricity necessary to analyze the reliability of river discharge (m3/s), high water fall (meters) and the time of engine operation plan generation (hours). Reliability discharge is obtained by calculating the flow data with FJ.Mock method. Evapotranspiration value in this study using Penman Method. Meanwhile, the data discharge measurements conducted field observations as a discharge control method of calculation results FJ.Mock. Based on the research results obtained in four locations debit mainstay at 0:39 Q60 m3 / sec (Jombok), 1:02 m3 / sec (Waturejo), 0:48 m3 / sec (Ngantru I), 3:14 m3 / sec (Ngantru II). Average large power awakened by calculation is 47.75 K. This amount is equivalent to the fulfillment of the electricity needs of as many as 47 home residences.

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