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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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INOVASI ALAT BIOREAKTOR DENGAN SISTEM FLUIDISASI DALAM PEMBUATAN ETANOL DARI MOLASSES Amsar Amsar; Wahyu Diah Proborini; Fenny Suryanti
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.v1i1.646

Abstract

The fermentation process is generally carried out in the community is in a batch, but the process is the concentration of ethanol produced is quite low because of accumulated ethanol production will poison the microorganisms in the fermentation process. Ethanol productivity of batch processes is very small because it takes a long time of about 72 hours. High and low ethanol content is determined in part by sugar levels in the substrate. Sugar compounds are required as a carbon source of energy yeasts. This study aims to determine the maximum results from the opening of flow rate and flow of glucose concentration on the effectiveness of the process and the quality of ethanol. The method used is fluidized semikontinyu fermentation system using Saccharomyces cerevisiae immobilized with the order. The results showed that the fermentation process fluidization semikontinyu that teramobilisasi with that carried out during the first day with a sugar concentration of 15%, 20%, 25%, 30% derived ethanol content of 5%, 8%, 13%, 15% at a flow rate of 30 openings °. Ethanol is also obtained by 8%, 12%, 18%, 20% in opening a flow rate of 60°. Ethanol is also obtained by 8%, 13%, 19%, 21% in opening a flow rate of 90°.
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%.
Studi Pemanfaatan Air Sumber Jenon untuk Pemenuhan Kebutuhan Air Irigasi dan Domestik di Kecamatan Tajinan Kabupaten Malang Kiki Frida Sulistyani; Danang Bimo Irianto
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.v3i2.1020

Abstract

Sumber Jenon merupakan salah satu sumber potensial yang ada di Kabupaten Malang, tepatnya di Desa Gunung Ronggo Kecamatan Tajinan. Saat ini Sumber Jenon sudah dimanfaatkan untuk memenuhi kebutuhan air Domestik seluruh penduduk Desa Gunung Ronggo (1136 KK) dan Desa Purwo Sekar sebanyak 2 RT (76 KK), serta untuk kebutuhan air irigasi di Desa Gunung Ronggo Seluas 72 Ha, dengan Pola Tanam Padi-Palawija. Sumber Jenon memiliki tampungan dengan keliling 159,13 m dan luas 649,1 m2. Dari Hasil pengukuran pada outlet kolam tampungan di dapatkan debit rata-rata air Sumber Jenon setelah dikurangi untuk kebutuhan air domestik adalah 139,2 l/dt. Berdasarkan kebutuhan air dari dinas ciptakarya, serta hasil informasi dari pengguna Kebutuhan air domestik untuk masyarakat kecamatan Tajinan adalah 60 l/orang/hari. Kebutuhan air domestik Desa Gunung Ronggo dan Sumber Sekar ( 2 RT)  saat ini adalah   3,44 l/dt, kebutuhan air irigasi 123,84 l/dt dengan daerah layanan seluas 72 Ha,sehingga didapatkan Ketersediaan air total Sumber Jenon saat ini adalah 142,6 l/dt. Hasil Perhitungan proyeksi penduduk tahun 2030 menyatakan , jumlah penduduk Desa Gunung Ronggo adalah 4093 jiwa dan Desa Sumber Sekar (2 RT) adalah 399 Jiwa. Dari hasil perhitungan  kebutuhan air domestik  tahun 2030 adalah 4,1 l/dt. Kebutuhan air untuk irigasi desa Gunung Ronggo adalah 123,84 l/dt dengan asumsi luas areal irigasi tetap bertahan 72 Ha. Dari Perhitungan ketersediaan air dan kebutuhan air di dapatkan neraca air pada tahun 2018 adalah 15,33 l/dt dan pada Tahun 2030 adalah 14,7 l/dt. Hasil Analisa  neraca air sampai dengan Tahun 2030, menyatakan bahwa air dari Sumber Jenon masih bisa dimanfaatkan untuk eksisting serta proyeksinya sampai tahun 2030 dan masih memiliki sisa potensi sebesar 10,45 liter/detik sehingga masih berpeluang di kembangkan untuk Seluruh Desa Gunung Ronggo, Purwo Sekar, Gunung Sari , Tajinan  serta areal irigasi seluas 72 Ha, dengan neraca air surplus sebesar 1,37 l/dt.Kata-kata kunci : ketersediaan air;kebutuhan air; pemanfaatan air ABSTRACTSumber jenon  is one of the potential sources that exist in Malang Regency, precisely in Gunung Ronggo Village, Tajinan District. Currently Jenon has been used to meet domestic water needs for all residents in Gunung Ronggo Village (1136 households) and 2 RT in Purwo Sekar Village (76 households), and for irrigation water needs in Gunung Ronggo Village, 72 hectares wide, with Pattern Padi-Palawija. At present Sumber Jenon has a 159.13 m3 storage area and 649.1 m2 of pool area. From the results of measurements at the storage pond outlet, the average discharge of Sumber jenon after being reduced for domestic water needs is 139.2 l / sec. Based on the water requirements of the Cipta Karya service, as well as the results of information from users, domestic water needs for the community of Tajinan sub-district are 60 l / person / day. Domestic water needs of Gunung Ronggo and Sumber Sekar Villages (2 RT) currently served by Sumber Jenon  are 3.44 l / sec, irrigation water needs 123.84 l / sec with 72 Ha of service area,  so the availability of Sumber Jenon total water source is 142.6 l / sec. Calculation Results of population projections in 2030 states, the population of Gunung Ronggo Village is 4093 people and Sumber Sekar Village (2 RT) is 399 people.   From the results of the calculation, domestic water demand in 2030 is 4.1 l / sec. The water needs for the irrigation of Gunung Ronggo village is 123.84 l / sec with the assumption that the irrigation area will last 72 ha. From the calculation of water availability and water demand, the water balance surplus in 2018 is 15.33 l / sec and in 2030 is 14.7 l / sec. Water balance analysis results up to 2030, stated that the water from Sumber Jenon can still be used for existing and projected until 2030 and still has the remaining potential of 10.45 liters / second so that it is still likely to be developed for the entire Gunung Ronggo Village, Purwo Sekar , Gunung Sari, Tajinan and an area of 72 ha of irrigation, with a surplus water balance of 1.37 l / sec.
PROYEKSI KETERSEDIAAN AIR TAHUN 2036 TERHADAP SUMBER AIR JUNREJO PADA HIPAM KELURAHAN DADAPREJA KECAMATAN JUNREJO KOTA BATU Sutikno Sutikno
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.v2i1.661

Abstract

With the goverment of the Batu city in 2014, budgeted used source to tandon, the following tandon temporary shelter who are in the way of Dr. Sutomo with a capacity of 72 meters cubic, be distributed to four a ham let which each hamlet have tub shelter wiht dimensions in accordance needs. Existing souarce possess the capacity dischange 24 liters/seconds, with survey the population of water users in 2014 until 2016. It is expected that population growth and capacity discharge there would be can satisfy the needs of water in keluarahan Dadaprejo up until the 2036
PERBANDINGAN METODE MICROWAVE HYDRODISTILLATION (MH) DAN MICROWAVE HYDRODIFFUSION AND GRAVITY (MHG) UNTUK MENGEKSTRAK MINYAK ATSIRI DARI KULIT JERUK Ayu Chandra Kartika Fitri; Fikka Kartika Widyastuti
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.v2i1.666

Abstract

One source of essential oil that has long been popular is a citrus fruit (Citrus aurantium). Results waste citrus peel around 500,000 tonnes per year. So the prospects for the utilization of waste orange peel are big enough to extract the essential oil. However, conventional extraction methods have drawbacks in terms of product quality, so to find solutions to these shortcomings, it is necessary to use the extraction method by Microwave Hydrodiffusion and Gravity (MHG). This method combines the use of microwave heating and physical phenomena (hydrodiffusi and earth gravity) at atmospheric pressure, without addition of organic solvents or water. In this study used fresh orange peel material 400 and 500 grams, two variable microwave power of 100 and 300 Watt and the extraction time for 15, 30, 45 and 60 minutes. To know the processing time and the microwave power effective method of MHG, oil composition was analyzed by GCMS to determine the amount of the fraction of oxygenated compounds. The larger of installed microwave power, the higher of operating temperature, so the %yield increases in a shorter time. From the comparison of energy consumed, the MHG method is give 30% more energy efficient than the Microwave Hydrodistillation (MHD) method. The use of microwaves does not change the physical properties of oil. The oil produced from the MHG method has a good quality because it has specific gravity and refractive index values that meet the EOA quality standard and has a greater oxygenated compounds content than the MHD method
ANALISIS RENCANA TATA TANAM GLOBAL (RTTG) TERHADAP KINERJA DAERAH IRIGASI LUASAN LEBIH DARI 3000 HA Hesti Triana; Antonius Suryono; Esti Widodo
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.v1i2.651

Abstract

The potential of irrigated land in the province of Papua untapped Seara clear, very suitable to serve as land development and land irrigation potential has not been clearly identifed. Koya is one of the transmigration program development that is expected to serve as a granary for the City and District mainstay Jayapura.Debit average67.003 m3 / sec for irrigation service area in Koya planned area of 4970 ha, Dam Tami sufficient to meet the water needs of irrigation areas Koya, which is an area of 3638 ha to 2978 ha of paddy details and the rest of the farm / fishing area of 660 ha. So that the provision of irrigation water will be carried out continuously. The system of planting(PTT) of the analytical results obtained RTTG variation 2 with cropping pattern Paddyrice-paddy rice (early planting in December and June) and Nila-Nila-Nila as RTTG elected, and after the simulation of the water balance and allocation model discharge surplus water obtained a total of 80.724 m3 / sec. But needs to be studied rampant land conversion, both of farmland to the fishery / pond, as well as the existence of human resources locals to expertise in farming
STUDI KEKUATAN ADHESI DAN APATITE INDUCTION ABILITY PADA PELAPISAN HYDROXYAPATITE PADA TITANIUM Kun Aussieanita Mediaswanti
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.v2i2.732

Abstract

Metallic biomaterials (titanium and titanium alloys) have been widely employed in many load-bearing orthopaedic applications, as they have excellent mechanical properties and corrosion stability. However, soaring problems such as a lack of direct chemical bonding between the implant and host tissues leading to implant loosening still persist. To prevent this problem, surface modifications such as applying hydroxyapatite onto titanium is necessary. The aim of this study is to investigate and to compare the bond strength and apatite induction ability of the hydroxyapatite coated titanium.
STUDI PERENCANAAN ULANG DINDING PENAHAN PADA HULU BENDUNG KRAMAT KECAMATAN TUMPANG KABUPATEN MALANG Kiki Frida Sulistyani; Kadir Lebao
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.v1i1.641

Abstract

This study aimed to performre-planning study on there taining wall of Kramat Weir, Tumpang District, Malang Regency. This planning wasused to over come the river bed scour resulting land slide and collapse of retaining walls at the up stream weir. Before planning the retaining wall, firstly it was performed hydrologican alysisconsisted of collecting rainfall data, rainfall analysis designed by Log Pearson Type III method, and calculating the design flood dischargeby using Nakayasu Method. Hydrological analysis resulted that flood discharge of 50 years period plan(Q50years) was 73.636m3/sec;with water level of2.50mabove weir plan. From the calculation results it was obtained that water level above weir could be planned the dimensions of retaining wall planned with building height (h) = 4.5 m (from foundation base), talud slope (z) 1:0.2 (v:h), depth offoundation (Df) = 1m, width of foundation base (b) = 2.50 m to the type of masonryconstruction. Analysis of stability of soil to capacity was less than robust ground i.e. Qallowed17.827t/m2(safe), while stability against sliding was 2.205 and roll was 1.815 with the safety number which was greater than 1.5 (safe). It can be concluded that there taining wall planis stable.
PERENCANAAN GEDUNG PERKULIAHAN 3 LANTAI DENGAN PONDASI SARANG LABA-LABA DI UNIVERSITAS TIMOR (TTU) Wilfridus Palbeno; Nawir Rasidi; Galih Damar Pandulu
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.v3i1.919

Abstract

University of Timor is one of the educational institutions located in Central Timor Regency (NTT) and very important role in improving human resources. In this thesis, taking the topic of planning the building on the foundation of the cobwebs. The foundation cobweb is a combination of conventional substructure which is a blend of flat concrete slab foundation constantly filled with soil improvement so that it becomes an integral composite reinforced concrete. These systems are specifically use the land as part of the foundation structure. This study aims to determine the strength of the foundation ksll meet q_a(Raft Foundation) < q_a(Foundations KSLL) and the cost required. The parameters used are from the test results sondir. The analysis starts from determining soil classification and load analysis. Then calculate the bearing capacity of the foundation, the maximum ground voltage, decrease, equivalent thickness, reinforcement dimensions ksll and budget plan (RAB) In University Timor East Timor Regency North. The results of the analysis of the maximum loading of 306.465 tons. Calculation of ground voltage due to the load of the building q = 5.352 tons / m². Calculation of the effective soil pressures (po) = 3.5022 or at 35.022 kn / m². Calculation of reduction / settlement total is 1.99 cm. Equivalent thickness of rib construction / settlement t_e = 134.5 cm. High-rib construction / settlement is 1.70 m. While the load distribution rib area construction / settlement is 5.81 t / m². Control of the shear reinforcement rib construction is s
Penilaian Resiko Kesehatan Lingkungan-EHRA (Fasilitas dan Perilaku Warga Perumahan Karanglo Indah) Terhadap Sampah Rumah Tangga Sunik Sunik; Deddy Kristianto; Lila Khamelda
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.v3i2.1015

Abstract

Perumahan Karanglo Indah, Kelurahan Balearjosari, Kecamatan Blimbing, Malang, Jawa Timur adalah salah satu perumahan menengah dengan beberapa masalah terkait dengan layanan sampah yaitu: 1) frekuensi pengambilan oleh petugas dari rumah ke rumah belum terpenuhi,  2) timbunan sampah yang tidak rutin diambil pada TPS  menimbulkan bau tidak sedap dan mengganggu, terlebih efek samping pada musim penghujan berupa bau, air sampah , lalat dan belatung semakin meningkat, 3) terjadi gunungan sampah karena timbunan sampah tidak diangkut menuju TPA pusat, 4) setiap rumah tangga sering membuang sendiri sampah ke TPS, 5) belum adanya kesadaran pemilahan sampah rumah. Tujuan penelitian ini adalah mendapatkan pemetaan hasil analisis penilaian resiko (EHRA) dalam bentuk persentase terkait fasilitas (layanan pembuangan-pengumpulan sampah) dan perilaku sanitasi (pemilahan sampah) terhadap sampah warga perumahan. Metode penelitian yang dilakukan adalah sosialisasi, survei dan wawancara kepada warga RW IV (RT 01 - RT 07) dan RW X (RT 04 dan RT 06).Terdapat + 26 blok, blok A – blok FF, populasi  sekitar 364 KK dan ditetapkan 96 KK sebagai sampel. Analisis data kuisioner menggunakan program bantu Excel dan SPSS. Analisis awal adalah reliabilitas dan validitas kuisioner. Analisis lanjutan berupa persentase hasil análisis EHRA berdasar rekapitulasi kuisioner. Hasil analisis penilaian resiko (EHRA) terkait fasilitas yaitu cara utama pembuangan sampah adalah 51,04% warga membuang sendiri ke TPS, frukuensi pengangkutan sampah 39,58% dilakukan sekali dalam seminggu, pengangkutan sampah 50% menyatakan bahwa kadang sampah diangkut kadang tidak meski 95,83% warga membayar iuran sampah (1 x dalam sebulan). Untuk perilaku sanitasi tentang sampah berupa pemisahan sampah sebelum dibuang (organik,sampah basah, dapur logam, gelas, plastik), 64,58% menyatakan memilah sampah sebelum dibuang dengan pertimbangan supaya bersih (72,92%). Kesimpulan penelitian yaitu fasilitas dan perilaku sanitasi warga tentang sampah masih beresiko terhadap kesehatan, warga masih kurang sadar dan peduli tentang sanitasi sampah dan pemilahannya.Kata kunci: fasilitas (layanan pembuangan-pengumpulan sampah); perilaku sanitasi (pemilahan sampah); EHRA  ABSTRACTKaranglo Indah Residential, Balearjosari Village, Blimbing Subdistrict, Malang, East Java is one of the middle residential with several problems related to waste services, namely: 1) the frequency of officers taking home-to-home has not been fulfilled, 2) landfills that irregular taken at laystall causes unpleasant odors and disturbances, especially the side effects in the rainy season in the form of odors, garbage water, flies and maggots are increasing, 3) there is a mountain of garbage because the landfill is not transported to the central landfill, 4) each household often throws garbage into laystall by own, 5) there is no awareness of sorting home waste. The research purpose was to obtain a map as analysis results of the risk assessment (EHRA) in the form of percentages related to facilities (garbage collection-collection services) and sanitation behavior (waste sorting) towards residential waste. The research method that used was socialization, surveys and interviews to residents of RW IV (RT 01 - RT 07) and RW X (RT 04 and RT 06). There were + 26 blocks, block A - block FF, a population of around 364 households and 96 households as a sample. Questionnaire data analysis using Excel and SPSS as assistance programs. The initial analysis is the reliability and validity of the questionnaire. Further analysis in the form of percentage of EHRA analysis results based on questionnaire recapitulation. Results of the risk assessment analysis (EHRA) related to facilities as the main method of waste disposal was 51.04% of residents throw the disposal by their own to the laystall station, the frequency of transporting waste was 39.58% done once a week, for garbage transport 50% stated that sometimes garbage was transported, sometimes it was not, even 95.83% of residents pay garbage fees (each month). For sanitation behavior about waste in the form of waste separation before being disposal (organic, wet waste, kitchen metal, glass, plastic), 64.58% stated that they sorting the waste before being disposed in consideration of being clean (72.92%). The research conclusion for sanitation facilities and behavior of residents about waste were still at risk against to health, people were still less aware and lack of care about waste sanitation and sorting.

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