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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 137 Documents
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ISOLASI DAN KARAKTERISASI RUNUTAN SENYAWA METABOLIT SEKUNDER FRAKSI ETIL ASETAT DARI UMBI BINAHONG (Anredera cordifolia [Tenore] steenis) Wahyu Diah Proborini; Chaidir Chaidir
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.v1i2.656

Abstract

Plant secondary metabolites, as products of secondary metabolism, are a tremendous available resource for pharmacy whether traditional or modern medicine system. Binahong (Anredera cordifolia [Tenore] steenis), also known as Madeira vine, is a medicinal plant that has been empirically recognized for several pharmacological compounds. This plant has also been utilized widely in the society for years as anti-oxidant, antiinflammation, anti-fungal, anti-bacteria, anti-diabetic and anti-cancer. Specifically, the research is aiming to identify molecular structure of secondary metabolite compound in ethyl acetate fraction of binahong roots using analytical HPLC while structure elucidation was done by LC-ESI MS, H-NMR and C-NMR. Analytical HPLC of ethyl acetate fraction has showed major peak on its separated derivative fraction, that is coded Ef 1.2 and Ef 1.3, on time retention 37,7 and 37,4 respectively. Considering the significant amount of Ef 1.2 fraction, then it is used in continued analysis rather than Ef 1.3 fraction. In addition, determination of molecular weight using LC-ESI MS resulted the number of molecular weight of Ef 1.2 fraction which is 296,22 Da (m/z). The molecular weight has closest possibility with empirical formula that is loaded from http://www.chemspider.com, is C20H34O. Characterization through H-NMR and C-NMR for its carbon-hydrogen framework was confirmed that the compound of Ef 1.2 is terpenoid named phenanthrena.
MEMBRAN SELULOSA ASETAT DARI NATA DE BAMBOO SEBAGAI MEMBRAN MIKROFILTRASI Fikka Kartika Widyastuti; Fenny Suryanti
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.v3i1.915

Abstract

Research has been conducted in order to utilize bacterial cellulose or nata as an alternative source of cellulose from plants for the manufacture of cellulose acetate which is applied as microfiltration membrane. Nata de bamboo is made from fermented bamboo shoots with the help of Acetobacter xylinium bacteria. Nata de bamboo is pressed with a hydraulic press tool then dried and then used as a base material of cellulose acetate membrane. The method used in the manufacture of cellulose acetate membranes is a common method that includes the swelling stage using glacial acetic acid, activation, acetylation and hydrolysis. The result of hydrolysis is then printed on a glass plate with immersion precipitation method to produce cellulose acetate membrane. Membrane characterization in the form of membrane permeability testing and membrane selectivity. Membrane permeability reached the value of flux of 140 L.m-2.jam-1 and membrane selectivity test yielded rejection coefficient of 90%. From this result it is concluded that cellular nitrate based acetate membrane can be used as microfiltration membrane.
PEMBUATAN ASAP CAIR DARI TEMPURUNG KELAPA,TONGKOL JAGUNG, DAN BAMBU MENGGUNAKAN PROSES SLOW PYROLYSIS Karolus Boromeus Reta; Sinar Abrina Anggraini
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.v1i1.647

Abstract

Penelitian ini bertujuan memanfaatkan limbah pertanian (tempurung kelapa, tongkol jagung dan bambu) menjadikan asap cair grade 3. Asap cair grade 3 bermanfaat sebagai anti bakteri dan anti oksidan (bahan pengawet alternatif yang alami). Proses slow pirolisis limbah tempurung kelapa tongkol jagung dan bamboo pada suhu 300 oC menghasilkan asap cair grade 3, terdanarang. Asap cair grade 3 yang mempunyai rendaman tertinggi yaitu tongkol jagung 48 %, tempurung kelapa 40 % dan bambu 36 %. Dari hasil  GC-MS dapat diketahui bahwa kandungan senyawa phenol yang  paling tertinggi yaitu tongkol jagung dengan konsentrasi 6.73 %  pada waktu retensi 4.502 menit dan senyawa acetic acid yang  paling tertinggi yaitu tongkol jagung dengan konsentrasi 84.45 % pada waktu retensi 2.240 menit.
MANAJEMEN METODE PELAKSANAAN PADA KONSTRUKSI BAJA MODEL “SPACE FRAME” PROYEK TERMINAL 3 ULTIMATE BANDAR SOEKARNO HATTA Mochammad Rofiudin; Nawir Rasidi; Galih Damar Pandulu
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.v2i2.728

Abstract

Commence a project ultimate terminal 3 Soekarno-Hatta airport Cengkareng, Jakarta, there are two important factors i.e. time factor and rescheduled work. This two factors are so need to be optimized by putting items together effectively, either before and after construction. Management system construction reference to the assumption that an implementation of the project can be implemented with the integrated system approach and the consistent of processes by the stage project implementation, if very stage process of system was done optimization against any problem. Time as one of main variables determine success or failure a project. The owners project expects net operation or the production of project have done. The sooner finished a project, the sooner ‘return of investment’ and the profit gained. The case that will be reviewed is an important of construction management system for handling a large project. From planning and control work time until they reached time of development projects effectively. Recommended to the community that construction management is one of alternative to reach particular purpose limited by time and resources. Understanding a construction project was an attempt to achieve a results in a building form desired and maximum profit.
Optimalisasi Kinerja Alat Pirolisis pada Pembuatan Biochar dari Limbah Jengkok Tembakau Hendra Banat; Sinar Perbawani Abrina Anggraini; Yeni Ulfi Rahayu; Taufik Iskandar
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 (644.779 KB) | DOI: 10.33366/rekabuana.v3i2.1022

Abstract

The pyrolysis process can convert biomass waste from various agricultural wastes into high value products, easy to operate, friendly of high environmental security standard and environment. This research aims to determine the optimization of pyrolysis machine performance based on temperature and combustion time in producing quality biochar. Variable pyrolisis temperature are (400, 450, 500, 550, 600) 0C with combustion time (30, 35, 40) minutes and type of biomass waste in the form of tobacco waste. Tobacco waste is the remnants of the production process of cigarettes in the form of fine (powder), put in a sack or burlap and stored in certain warehouses to avoid undesirable things to the environment. Pursuant to result of research which have been done, the optimal performance of pyrolysis machine is at 500 °C and 30 minutes with biochar moisture content of 0,06%, biochar percentage 29,79%, loss components of 70,21%, heat loss of 304,50 KJ / Kg and machine performance of 17,06 Kg / m.h. So that can be concluded that a pyrolysis machine can be said to be optimal if the machine produces biochar with low moisture content, high biochar percentage (yield percentage), low loss components, low discharged energy and produce high machine performance with the lowest possible time.
ANALISIS PENGEMBANGAN AIR BAWAH TANAH TERHADAP KEPUASAN MASYARAKAT DI KECAMATAN SUMBERMANJING WETAN KABUPATEN MALANG Andy Kristafi Arifianto
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.v2i1.662

Abstract

The purpose of this study was to describe the water flow, water requirement, water quality and satisfaction of society Subdistrict Sumbermanjing Wetan Malang Regency, analyze the effect of water flow, water requirement and water quality to the satisfaction of the people Subdistrict Sumbermanjing Wetan Malang Regency and to analyze between variable water flow, need for water and the water quality of the dominant influence on society satisfaction District of Sumbermanjing Wetan Malang Regency. The population in this study is the whole society Sumbermanjing Wetan District of Malang, amounting to 100.065 people. The number of samples in this study as many as 100 people. The sampling technique used in this study is simple random sampling. The analysis technique used is multiple regression analysis, F test and t test. Discharge water, water needs and water quality simultaneously significant effect on public satisfaction District of Sumbermanjing Wetan Malang Regency. This shows that the discharge of water plays a role in improving people's satisfaction and the better its water needs can lead to increasing people's satisfaction, as well as water quality perceived by the society of water is odorless, colorless, tasteless and tasted fresh able to increase community satisfaction. Discharge water, water needs and water quality is partially significant effect to the satisfaction of the District community Sumbermanjing Wetan Malang Regency. Water quality is dominant compared to variable water flow and water needs, which means that the main thing to consider in achieving the people's satisfaction is the quality of the water.
REVIEW PERBANDINGAN PENCEMARAN MINYAK DI PERAIRAN DENGAN PROSES BIOREMEDIASI MENGGUNAKAN METODE BIOSTIMULUS DAN BIOAUGMENTASI Zhafira Yasmin; Ria Wulansarie
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.v3i1.943

Abstract

Pencemaran minyak di wilayah perairan akibat tumpahan minyak merupakan masalah lingkungan yang sangat penting. Tumpahan minyak di perairan, terutama kecelakaan tumpahan minyak skala besar , telah memberikan ancaman besar dan menyebabkan kerusakan yang luas. Kontaminan dapat terakumulasi didalam tubuh organisme laut dan berbahaya bagi manusia yang memakannya. Untuk menanggulangi masalah pencemaran minyak di perairan ini, terdapat beberapa cara yang dapat dilakukan salah satunya adalah bioremediasi yang merupakan proses pemulihan air dengan memanfaatkan mikroorganisme sebagai bakteri pemecah minyak. Terdapat dua metode dalam proses bioremediasi yaitu metode biostimulasi dan bioaugmentasi. Penelitian ini bertujuan menguraikan proses bioremediasi sebagai alternatif dalam upaya pengendalian pencemaran air, meliputi: isolasi, pengujian degradasi zat pencemar, dan perbanyakan bakteri serta untuk mengetahui perbandingan proses bioremediasi dengan metode biostimulasi dan bioaugmentasi.. Hasil isolasi dan identifikasi yang berasal dari “bakteri indigenous” didapatkan: Microccocus, Corynebacterium, Phenylo-bacterium, Enhydro-bacter, Morrococcus, Flavo-bacterium, Bacillus, Staphylococcus, dan Pseudomona, yang dapat mendegradasi logam Pb, nitrat, nitrit, bahan organik, sulfida, kekeruhan, dan amonia. Sedangkan dari bakteri “commercial product” didapatkan jenis: Bacillus, Pseudomonas, Escherichia, serta enzym Amylase, Protease, Lipase, Esterase, Urease, Cellulase, dapat mendegradasi pencemar organik, nitrogen, fosfat, maupun kontrol pertumbuhan alga. Perbanyakan bakteri dari isolat bakteri indigenous dapat dikerjakan di laboratorium sedangkan bakteri “commercial product” bisa didapatkan di pasaran
PENGARUH PENGGUNAAN ABU TERBANG (FLY ASH ) TERHADAP KUAT TEKAN DAN PENYERAPAN AIR PADA MORTAR Armin Naibaho; Takim Takim; Diana Ningrum
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.v1i2.652

Abstract

Mortar or species is one of the building materials which serves to glue the bricks, brick, and stucco. During this time still using portland cement mortar and lime as the main connective materials are expensive. Therefore we need an alternative other connective materials that have cheaper prices and predicted can improve the compressive strength of mortar. Alternative fastening material used in this study is waste from coal combustion, ie fly ash (fly ash). This study uses a mixture of cement and sand composition of 1: 3 at a weight ratio of fly ash to cement amounted to 0%, 5%, 10%, 15%, 20%, 30%. Samples were tested compressive strength and water uptake is cube-shaped sample with a size of 5 cm x 5 cm x 5 cm. Based on the results of research conducted showed that the addition of fly ash was found to increase the compressive strength of mortar and act as filler so as to reduce water absorption, which in get the most optimum composition occurs in the percentage of 15% of the weight of the cement with the compressive strength at 28 days amounted to 420.00 Kg / cm² and water absorption of 1.67%
IMPLEMENTASI PERSAMAAN MOORE AND BURCH UNTUK MENENTUKAN INDEKS EROSI POTENSIAL PADA DAERAH ALIRAN SUNGAI (DAS) BABAKAN KABUPATEN BREBES JAWA TENGAH Poegoeh Prasetyo Rahardjo; Alexander Tunggul Sutan Haji
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.v2i2.733

Abstract

The research aim to make an spatial information system to determine Potential Erosion Index in Babakan watershed area to learning, testing, and evaluating erosion level using Geographical Information System (GIS). Spatial analysis that used are Digital Terrain Modelling (DTM)/Digital Elevation Modelling (DEM) that integrated with Moore and Burc (1986) equations. This analyze represented land surface relief in 3 dimension form to increase correctness of identification of land slope, catchment area, flow direction, flow accumulation, length of flow, and flowing area. The datas that used on this research are digital tophographic map 1:25000 scale, watershed boundary map, rivers network of Babakan watershed map, and landuse map. Analysis on this research is DEM processing from the countour map than integrated them to the Moore and Burch (1986) equations. The result of this research shown that minimum Potential Erosion Index value is 0 and maximum is 12244515840.
PENGARUH PENGGANTIAN PASIR LUMAJANG DENGAN PASIR ERUPSI GUNUNG KELUD TERHADAP KUALITAS MORTAR Nawir Rasidi; Diana Ningrum
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.v1i1.643

Abstract

Mortar serves to increase the resilience of the bond and the bond with a constituent part of this part of the construction. Mortar strength depends on the cohesion of the cement paste to aggregate the fine particles. This study use traditional testing methods for analyzing the compressive strength marshall mortar with a variation of 0%, 50% and 100%, the age of 7 days, 14 days, and 28 using the composition 1pc: 3PS, 1pc: 4Ps, and 1pc: 6ps. Making the test object to the composition of the test object 5 0% for sand Lumajang, 50% sand and Kelud Lumajang, and 100% sand Kelud. Implementation phases include testing of materials, namely water, cement, and sand. Pengujan mortar composition 1pc: 3PS, 1pc: 4Ps, and 1pc: 6 Ps age of 28 days, the mean value obtained Lumajang sand 307,20kg / cm², 257,60kg / cm² and 96.80 kg / cm², sand Lumajang and kelud of 338 , 40kg / cm², 124,80kg / cm², and 60,80kg / cm², and the use of sand kelud 212.00 kg / cm², 151.20 kg / cm², and 41.60 kg / cm². While the water absorption at 28 days average composition 1pc: 3pasir Lumajang by 1.29%, sand Lumajang and kelud of 1.85%, and sand kelud by 1.64%. Composition 1pc: 4 by 1.62% Lumajang sand, sand and sand kelud Lumajang by 3.44% and amounted to 3.15% kelud sand. KomPsisi 1pc: 6 amounted to 2.96% Lumajang sand, sand Lumajang and kelud by 4.68% and amounted to 5.49% kelud sand.

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