Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia最新文献

{"title":"Analisis Pengolahan Limbah Padat Tahu Terhadap Alternatif Industri Pangan Sosis (Grade B)","authors":"Ibnu Sina, Untung Nugroho Harwanto, Z. Mubarok","doi":"10.32493/JITK.V5I1.9193","DOIUrl":"https://doi.org/10.32493/JITK.V5I1.9193","url":null,"abstract":"Literature studies show that the nutrient content in tofu pulp is still high; however the utilization of this waste is still relatively low by the community. Nowadays, tofu dregs is still widely used as an ingredient for animal feed. Some of the reasons why people don't take advantage of tofu waste are consits of the funding, equipment, time and worries related to starting their own business. The aims of this study is to make a pre-designed tofu dregs processing plant into a multipurpose product aggregate such as sausages driven by the tofu business community. The method stage in this research is making a feasible product and process scheme, analyzing tofu solid waste in the form of a paper project and making a household scale sausage production prototype. The results of this study are able to produce a role model for tofu dregs utilization which is more  conomically valuable but still meet the standard and quality of reasonableness. The results of the role model will be disseminated by reaching out to tofu entrepreneur communities to collaborate with each other so that the utilization of tofu with high economic value can be carried out more massively, structurally and systematically.","PeriodicalId":20973,"journal":{"name":"Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74825555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Kinetika Adsorpsi Zat Warna Direct Brown Menggunakan Hidroksiapatit Dengan Variasi Dosis Adsorben dan pH Larutan","authors":"U. Rahayu","doi":"10.32493/JITK.V5I1.7390","DOIUrl":"https://doi.org/10.32493/JITK.V5I1.7390","url":null,"abstract":"Adsorption is a dye absorption process using various adsorbents. Dye waste produced by industry can pollute the environment because it is dangerous and poisonous. In this study, calcium-deficient hydroxyapatite with a Ca / P ratio of more / less than 1.67 was used as the adsorption medium. Utilization of the adsorption process in dye absorption is useful for determining isotherm models and adsorption kinetics. The dye used is direct brown. The dye adsorption process was carried out at variations in pH (6, 7, 8) and adsorbent mass (0.1; 0.15; 0.2 wt%) at a rotating speed of 250 rpm and 30 ppm of dye concentration. The maximum adsorption capacity occurs at pH 6 with an absorption efficiency of 51.4%. The equilibrium model tested is the Langmuir, Freundlich, Harkins Jura, Temkin equilibrium model. and Dubinin-Raduskevich. The isotherm model of the direct brown dye adsorption process follows the Temkin model with a R2 value of 0.9996. The adsorption kinetics tested were Pseudo First Order, Pseudo Second Order, Elovich and Intraparticle Diffusion. The kinetics of the direct brown dye adsorption process followed the intraparticle diffusion order kinetics model with R2 value of 0.9938 in the adsorption process with a pH of 6 and an adsorbent mass of 0.5 grams.","PeriodicalId":20973,"journal":{"name":"Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78051175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preliminary Study on pH Optimization of Biogas Production Using POME, Palm Oil Mill Effluent","authors":"J. Prasetyo","doi":"10.32493/JITK.V5I1.7453","DOIUrl":"https://doi.org/10.32493/JITK.V5I1.7453","url":null,"abstract":"Organic waste that is not utilized will cause stinky odor. The Organic waste, especially liquid one,  has high COD. This kind Wastes with high COD are usually left not easily decomposed and those that live in the environment are anaerobic microbes which normally produce gas in metabolism. The gas usually consists of H2S and NH3 which give off an unpleasant odor. Handling of this organic waste by using a microbial source from cow dung can direct the waste conversion process to produce the main product in the form of methane (CH4). Preliminary study of liquid waste management from palm oil mill effluent (POME) in its handling. The initial conditioning was carried out by incubating cow manure and adding POME gradually by maintaining the pH of the media around 6.5. Uncontrolled treatment with a pH that did not change much from the initial pH of POME, which was between 4 - 5.5. The resulting biogas pH can reach 5.5 - 6.5 with CH4 when it is around 50%. Meanwhile, pH 6.5 - 7.5 gave the best biogas yield, namely 60%, even in the best conditions the CH4 concentration could reach 62.34% at pH 7.6.","PeriodicalId":20973,"journal":{"name":"Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88114959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pembuatan dan Uji Kualitas Sabun Transparan dengan Variasi Minyak Kelapa Murni atau Virgin Coconut Oil (VCO) Dan Minyak Kelapa Sawit","authors":"A. S. Afrozi","doi":"10.32493/JITK.V5I1.7082","DOIUrl":"https://doi.org/10.32493/JITK.V5I1.7082","url":null,"abstract":"This research was conducted to make transparent soap appropriate to the Indonesian national standard (SNI 3235-2016). Transparent soap is made using raw materials of virgin coconut oil (VCO) and palm oil with NaOH, stearic acid. Addition of dyes and fragrances to increase the aesthetic value of the soap appearance. The addition of alcohol, sugar, and glycerin is used to bring out a clear and translucent color. The method of making transparent soap is a saponification method with a temperature used of 600C - 700C. The tests carried out include oil testing and transparent soap testing. Oil testing, among others: free fatty acids and density. Meanwhile, transparent soap testing, among others: pH, free fatty acids or free alkalis, moisture content, organoleptic, and preference test. Based on the results of tests that have been carried out by soap, it is known that the best formula for making transparent soap with palm oil is in the 1C20 formula where 150 mL of palm oil are used, 20 grams of sugar are dissolved in 10 mL of aquadest. Meanwhile, the best formula for making transparent soap from virgin coconut oil (VCO) is the 1Y20 formula where 100 mL of virgin coconut oil (VCO) are used, and 20 grams of sugar are dissolved in 10 mL of aquadest. Soaps that meet the standards of SNI 3532-2016 and SNI 06 - 3532 1994 are 1Y10,1Y20,1Y30 and 1Z10 soap.","PeriodicalId":20973,"journal":{"name":"Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78458630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modifikasi Pembuatan Tahu Dengan Penggunaan Lama Perendaman, Lama Penggilingan dan Penggunaan Suhu dalam Upaya Meningkatkan Kualitas Produk Tahu","authors":"Didik Iswadi","doi":"10.32493/JITK.V5I1.7008","DOIUrl":"https://doi.org/10.32493/JITK.V5I1.7008","url":null,"abstract":"In making tofu today, consuming energy for the tofu making process requires a large amount of energy. So that research must be able to choose the minimum energy use in the process of making tofu. Tofu has a short shelf life and quickly becomes rotten. The purpose of this study was to determine the best tofu making in terms of the use of variations in soaking time, boiling temperature and stirring time, knowing the best quality of tofu in terms of moisture content, protein content and texture of tofu products, knowing the value of tofu content from using variations in soaking time boiling temperature and stirring time. The quantitative method is taken from the analysis of water content, protein content, and tofu texture. The following is how to make tofu as follows, 1 kg of soybeans, washed sufficiently then soaked first, the soybeans are then milled with a special machine with 7 liters of raw water, heated, then stirred slowly, then take the clotted tofu with a scoop then put it in the mold and pressed or pressed, let stand until slightlycool, the last tofu is ready to be consumed. The result of modification test in making tofu that has the best value from the use of soaking time, grinding time, and temperature variation is sample 2 with a soaking time of 3 hours, 10 minutes of grinding time and a temperature variation of 80°C with a moisture content value of 82.17%, protein 11.61% and texture values of 6,44 N and 5,45 N.","PeriodicalId":20973,"journal":{"name":"Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84117802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis of Shielding Radiation Neutron Materials Made from Wood Powder With Variation of Borax Content","authors":"R. Salam, A. Afrozi","doi":"10.32493/jitk.v5i1.6485","DOIUrl":"https://doi.org/10.32493/jitk.v5i1.6485","url":null,"abstract":"Synthesis of Shielding Radiation Neutron Materials Made from Wood Powder with Variation of Borax Content has been carried out as a shield of neutron radiation. The material used as a neutron shield is wood powder added 10%, 20%, 30% and 50% borax with variations in the thickness of each 5 mm, 10 mm, 15 mm, which previously saw wood powder milled with HEM (High Energy Milling ) for 1 hour and mixed with borax using HEM (High Energy Milling) for 1 hour and compacted using a diameter of 25.4 mm with a pressure of 2000 Psi. The results of observations with optical microscopes show that the spread of borax which is less evenly distributed may be due to the type of borax that is used in wood blends that have properties that quickly clot and cannot be evenly mixed with wood. The results of the compressive test using a Universal Tensile Machine tool produced strong for 224 N wood and in the mixture of 50% borax wood which was closest to the strength of wood which was equal to 172 N","PeriodicalId":20973,"journal":{"name":"Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84694832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Penggunaan Limbah Kulit Singkong pada Filter Air Sederhana Skala Rumah Tangga","authors":"Ihat Solihat, Agustin Setyowati","doi":"10.32493/JITK.V5I1.8639","DOIUrl":"https://doi.org/10.32493/JITK.V5I1.8639","url":null,"abstract":"Cassava (Manihot utillisima) is a staple food for Indonesians after rice and corn. Cassava is a natural product (product) which is abundant in Indonesia, especially in the areas of Central Tawa and West Java. Activated carbon is a porous material derived from carbon material by combustion or thermal decomposition. Activated carbon is widely used for water purification, medicine, waste treatment and as a filter in compressed air (Lam et al., 2017). The purpose of this research is the quality of activated charcoal from cassava peel absorption capacity of activated carbon from cassava peels as a water filter, especially for removal of Cu (II) metal with a variety of activators and the optimum duration of contact with the use of activated carbon in a simple home scale water filter. The results showed that the quality of activated charcoal from coffee grounds which includes the quality of yield, moisture content, ash content and absorption of iodine has met SNI No.06-3730- 1995 Activated Charcoal Quality Standards. The higher the concentration, the greater the absorption of activated charcoal on Cu (II) metal, and from the variation data the most optimal activator is activated charcoal with a KOH activator of 0.3 m. The results of boxing the activated charcoal within 5 hours with an average yield of 0.1898 mg per liter meet the clean water standards, namely according to the 2008 East Java Regional Regulation which states that the Cu content in water is at a threshold of 0.2 mg per liter.   ","PeriodicalId":20973,"journal":{"name":"Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80120285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tujuan","authors":"Wahyu Isra Deni, Afdhal Afdhal","doi":"10.24036/student.v4i2.842","DOIUrl":"https://doi.org/10.24036/student.v4i2.842","url":null,"abstract":"Tujuan penelitian ini adalah untuk 1). Mengetahui bagaimana ketersediaan sarana air bersih di Desa Sungai Pasak. 2). Mengetahui bagaimana kondisi MCK di Desa Sungai Pasak. 3). Mengetahui bagaimana kondisi sarana pembuangan sampah di Desa Sungai Pasak. 4). Mengetahui bagaimana kondisi sarana pembuangan air limbah di Desa Sungai Pasak. \u0000Penelitian ini merupakan penelitian deskriptif. Jenis data yang digunakan adalah data primer. Ada 74 orang menjadi sampel responden penelitian yang berada di 4 dusun yang berada di Desa Sungai Pasak. Pengambilan data dengan cara menyebar angket dan dianalisis menggunakan tekinik analisa data menurut Ari Kunto. \u0000Hasil dari penelitian ini yaitu : 1). Ketersediaan sarana air bersih sudah memadai namun (10%) masih mengandalkan air sungai yang tergolong bersih. 2). Kondisi MCK sudah memenuhi ketentuan dan syarat dengan adanya 95% rumah tangga yang memiliki kamar mandi dan jamban. 3). Kondisi pembuangan sampah sudah memenuhi syarat kesehatan lingkungan dapat dilihat dari 27% masyarakat membuang sampah di tong sampah rumahnya, 68% masyarakat membuang sampah di tanah galian perkarangan rumah dan 5% masyarakat membuang sampah langsung ke TPA. 4). Kondisi pembuangan air limbah belum memenuhi syarat kesehatan lingkungan dapat dilihat dari 7% masyarakat yang tidak memilki saluran limbah, 20% masyarakat yang memilki saluran limbah menuju sungai, 41% masyarakat yang memilki saluran limbah menuju kolam dan 32% masyarakat yang memiliki saluran limbah menuju saluran irigasi.","PeriodicalId":20973,"journal":{"name":"Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77151995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pengolahan Limbah Krom menggunakan Limbah Kulit Kacang Tanah","authors":"Kartika Udyani, D. Purwaningsih, Mochamad Ali Wafa, Mokhammad Rif'an Kholili","doi":"10.33366/rekabuana.v5i1.1659","DOIUrl":"https://doi.org/10.33366/rekabuana.v5i1.1659","url":null,"abstract":"The metal coating industry produces waste water containing chromium metal in concentrations large enough so that it will be dangerous if disposed of directly without being processed first. The aim of this study was to determine the effect of peanut shell activation, biosorbent weight, and contact time for chromium metal removal. Then peanut shells are activated using H2SO4 0.05 M. Furthermore, peanut shells used as biosorbents are weighed as much as 1, 2, 3, 4 and 5% of the weight of industrial liquid waste that has been determined. Then the stirring process is carried out with a speed of 150 rpm with a contact time of 30, 60 and 90 minutes. After that the mixture is filtered and the total chrome metal is analyzed. Based on the results of the study it can be concluded that biosorbents from acid-activated peanut peels can reduce chrome metal by 62.23% while biosorbents without activation are able to reduce chrome metal by 42.92%. The best results of biosorbent on chromium removal were obtained on the addition of biosorbent weight of 5: 100 at a contact time of 60 minutes with a stirring speed of 150 rpm which was 83.38%.ABSTRAKIndustri pelapisan logam menghasilkan limbah cair yang mengandung logam krom dalam konsentrasi yang cukup besar sehingga akan berbahaya jika dibuang langsung tanpa diolah terlebih dahulu. Penelitian ini bertujuan untuk mengetahui pengaruh aktivasi kulit kacang tanah, berat biosorben, dan lama waktu kontak terhadap removal logam krom pada air limbah. Penelitian ini diawali dengan mengoven kulit kacang tanah dengan suhu 1050C, kemudian diblender dan diayak sehingga mendapatkan ukuran 100 mesh. Kemudian kulit kacang tanah diaktivasi menggunakan H2SO4 0,05 M. Selanjutnya kulit kacang tanah digunakan sebagai biosorben ditimbang sebanyak 1, 2, 3, 4 dan 5 % terhadap berat limbah cair industri yang telah ditentukan. Selanjutnya dilakukan proses pengadukan dengan kecepatan 150 rpm dengan lama waktu kontak 30, 60 dan 90 menit. Setelah itu campuran disaring dan hasil filtrat dianalisa logam krom totalnya. Berdasarkan hasil penelitian dapat disimpulkan bahwa biosorben dari kulit kacang tanah teraktivasi asam mampu menurunkan logam krom sebesar 62,23% sedangkan biosorben tanpa aktivasi mampu menurunkan logam krom 42,92%. Hasil terbaik biosorben terhadap removal krom diperoleh pada penambahan berat biosorben sebesar 5:100  pada lama waktu kontak 60 menit dengan kecepatan pengadukan 150 rpm yaitu 83,38%.  ","PeriodicalId":20973,"journal":{"name":"Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89076871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Efek Penambahan Fly Ash Tipe C terhadap Kuat Tekan Mortar","authors":"Armin Naibaho, Aulia Rahman","doi":"10.33366/rekabuana.v5i1.1612","DOIUrl":"https://doi.org/10.33366/rekabuana.v5i1.1612","url":null,"abstract":"Abstrak Bahan alternatif pengganti semen mulai banyak dicari karena isu lingkungan. Proses pembuatan semen konvensional terindikasi sebagai salah satu penyumbang tertinggi dalam meningkatnya kadar karbondioksida di udara. Salah satu substansi yang marak digunakan untuk bahan pengganti semen adalah fly ash karena sifatnya yang serupa dengan semen dan jumlahnya yang melimpah sebagai hasil residu pembakaran tungku batu hara di PLTU. Secara umum, fly ash sendiri dikelompokkan menjadi dua jenis yaitu tipe C dan F. Tipe C jarang digunakan karena karakternya yang mudah mengeras. Namun, pada penelitian lebih lanjut, tipe ini memiliki kelebihan dalam meningkatnya kuat tekan pada umur prematur. Penelitian ini dibuat untuk mendapatkan rasio fly ash tipe C yang tepat dengan cementitious material pada mortar. Pengetesan dilakukan hanya pada minggu pertama dan kedua untuk mengamati perkembangan kekuatan awal. Namun, tidak semua kombinasi bisa diujikan karena kekuatannya terlalu rendah. Hanya kombinasi fly ash 25% saja yang memberikan kekuatan 20 MPa pada umur 7 hari, yang mana mengungguli sampel kontrol dengan kekuatan 19,36 Mpa. Untuk selanjutnya, kekuatan sampel fly ash cenderung lebih rendah jika dibandingkan dengan sampel kontrol.","PeriodicalId":20973,"journal":{"name":"Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79557230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}