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

{"title":"Analisis Perbandingan Waktu Perjalanan dan Biaya antara Kendaraan Pribadi dan Transjakarta menggunakan Metode PCI (Studi Kasus : TJ Koridor IX Pinang Ranti-Pluit)","authors":"A. Utami, William Kurnia Rubin Natio","doi":"10.33366/rekabuana.v6i2.2649","DOIUrl":"https://doi.org/10.33366/rekabuana.v6i2.2649","url":null,"abstract":"Selection of the use of transportation modes to travel from origin to destination is influenced by various factors. Factors that must be considered include travel time, vehicle operating costs (VOK), and the value of travel time. The purpose of this study is to determine which model will be chosen by the user to travel and discusses the comparative analysis of travel time and cost of public transportation modes, namely Transjakarta and private cars. This research was conducted in DKI Jakarta, precisely in the Transjakarta corridor IX Pinang Ranti-Pluit. Measurement of travel time is done by riding each mode with the same route and time. Secondary data as calculation material was obtained from agencies related to this research. This study analyzes Vehicle Operational Costs (VOK) using the Pacific Consultants International (PCI) method. The results showed that during peak hours, the use of Transjakarta was more effective in terms of time because the travel time required was 11 minutes faster than in private vehicles. Then for the costs incurred, it is also more efficient to use Transjakarta at the cost of Rp. 3,500 per trip. Meanwhile, using a private vehicle of Rp. 14,784 per person with a passenger car capacity of 7 people. During the COVID-19 pandemic, there was a provision for a passenger car capacity limit of 4 people. So the cost of using a private vehicle per person can reach Rp. 25,871.ABSTRAKPemilihan penggunaan moda transportasi untuk melakukan perjalanan dari asal ke tujuan dipengaruhi oleh berbagai macam faktor. Faktor yang diperhatikan antara lain waktu tempuh, Biaya Operasional Kendaraan (BOK) dan nilai waktu perjalanan. Untuk memperkirakan mode apa yang akan dipilih oleh masyarakat untuk bepergian, penelitian ini membahas tentang analisis perbandingan waktu tempuh dan biaya moda transportasi umum yaitu transjakarta dan mobil pribadi.  Penelitian ini berlokasi di provinsi DKI Jakarta tepatnya pada koridor IX transjakarta Pinang Ranti-Pluit. Pengukuran waktu perjalanan dilakukan dengan cara menaiki masing-masing moda dengan rute dan waktu yang sama. Data sekunder sebagai bahan perhitungan, diperoleh dari instansi yang terkait dengan penelitian ini. Analisis Biaya Operasional Kendaraan (BOK) dalam penelitian ini menggunakan Metode Pacific Consultants International (PCI) Hasil penelitian menunjukkan bahwa pada jam sibuk penggunaan Transjakarta lebih efektif secara waktu karena waktu tempuh yang diperlukan lebih cepat 11 menit dibandingkan dengan kendaraan pribadi. Kemudian untuk biaya yang dikeluarkan juga lebih efisien menggunakan Transjakarta dengan biaya sebesar Rp 3.500 sekali perjalanan. Sedangkan jika dibandingkan dengan menggunakan kendaraan pribadi sebesar Rp 14.784 perorang dengan kapasitas mobil penumpang sebanyak 7 orang. Pada masa pandemic covid-19, terdapat ketentuan batas kapasitas mobil penumpang sebanyak 4 orang. Sehingga biaya menggunakan kendaraan pribadi perorangnya dapat mencapai Rp. 25.871.","PeriodicalId":20973,"journal":{"name":"Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia","volume":"51 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90824004","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":"Evaluasi Pengaruh Kondisi Operasi Terhadap Kualitas Produk Bawah Kolom Debutanizer","authors":"H. N. Aulia, Zami Furqon","doi":"10.33366/rekabuana.v6i2.2645","DOIUrl":"https://doi.org/10.33366/rekabuana.v6i2.2645","url":null,"abstract":"The distillation process in the debutanizer column has an essential role in separating the catalytic naphtha product from the light fraction consisting of C3 and C4 hydrocarbon components, both saturated and unsaturated. The naphtha catalytic product is used to blend gasoline because it has a high octane number. The distillation process in the column produces the bottom product of catalytic naphtha and the top product, which is the feed for the stabilizer column. In order to obtain the quantity and quality of catalytic naphtha products, it is necessary to adjust the operating conditions of the debutanizer column properly so that a product that meets the desired specifications is obtained. The method used is the short-cut calculation method which includes the calculation of the material balance and the determination of the condition of the incoming feed. Data collection is obtained from data in the industry. After calculating the material balance of the debutanizer column, the composition of the hydrocarbon constituents of the feed, the top product, and the bottom product can be seen. From the composition data, it can be seen the relationship between operating conditions and the quality of the resulting product. The higher the column operating pressure, the lighter components will be affected, increasing the C4 minus content carried to the bottom product. The higher the C4 minus content, the higher the octane number of catalytic naphtha, but this also affects the Reid Vapor Pressure (RVP) of catalytic naphtha, which also increases. Setting the operating pressure of the column should still pay attention to the product RVP limits, so that product specifications are fulfilled.ABSTRAKProses distilasi pada kolom debutanizer memiliki peran yang penting untuk memisahkan produk catalytic naphta dari fraksi ringan yang terdiri atas komponen hidrokarbon C3 dan C4, baik jenuh maupun tak jenuh. Produk catalytic naphta tersebut digunakan sebagai komponen blending gasoline karena memiliki angka oktan yang tinggi. Proses distilasi pada kolom tersebut dihasilkan produk bawah catalytic naphta dan produk atasnya yang merupakan umpan bagi kolom stabilizer. Untuk mendapatkan kuantitas dan kualitas produk catalytic naphta, maka diperlukan pengaturan kondisi operasi kolom debutanizer yang tepat sehingga diperoleh produk yang sesuai dengan spesifikasi yang diinginkan. Metode yang digunakan adalah metode perhitungan short-cut yang meliputi perhitungan material balance, dan penentuan kondisi umpan masuk. Pengumpulan data didapatkan dari data di industri. Setelah dilakukan perhitungan material balance kolom debutanizer dapat diketahui komposisi hidrokarbon penyusun umpan, produk atas, dan juga produk bawah. Dari data komposisi tersebut dapat diketahui hubungan antara kondisi operasi terhadap kualitas produk yang dihasilkan. Semakin tinggi tekanan operasi kolom, maka akan mempengaruhi komponen ringan, yakni meningkatkan kandungan C4 minus yang terikut ke produk bawah. Semak","PeriodicalId":20973,"journal":{"name":"Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81889986","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":"Perancangan Spiral Kondensor untuk Pengolahan Sampah Plastik Menjadi Bahan Bakar Minyak dengan Proses Pirolisis","authors":"M. A. Batutah, Deni Arifin, Poniman Poniman, S. Solikin","doi":"10.33366/rekabuana.v6i2.2686","DOIUrl":"https://doi.org/10.33366/rekabuana.v6i2.2686","url":null,"abstract":"This study aims to determine the dimensions of the spiral groove condenser to convert plastic waste into fuel and determine the material's effectiveness for making spiral groove condensers. This research was conducted in stages: potential identification, data collection, equipment design and calculation, design validation, testing, and equipment feasibility test. In the testing and equipment feasibility test, namely by inserting plastic waste into the pyrolysis process reactor, then heated to a temperature of 180 oC and an evaporation process occurs, the vapors obtained are then condensed to be fuel. The spiral groove condenser design is made with a length of 3 m, a diameter of 30 cm, and a height of 34 cm use ½ inch galvanized iron material and a plate thickness of 0.0127 mm. The cooling water circulation process uses a spiral iron pipe, with a temperature of steam entering the condenser 180 oC and the temperature of the water in the condenser is 40 oC. From 1000 gr of plastic waste can be produced as much as 100 ml of fuel.ABSTRAKPenelitian ini bertujuan untuk mengetahui dimensi kondensor alur spiral untuk merubah sampah plastik menjadi bahan bakar minyak, untuk mengetahui efektifitas bahan pembuatan kondensor alur spiral. Penelitian ini dilakukan dengan tahapan : identifikasi potensi, pengumpulan data, desain peralatan dan perhitungan, validasi desain, pengujian dan uji kelayakan alat. Pada proses pengujian dan uji kelayakan alat yaitu dengan memasukkan sampah plastik kedalam reaktor proses pirolisis, selanjutnya dipanaskan sampai temperatur 180 oC dan terjadi proses penguapan, uap yang yang diperoleh selanjutnya di kondensasi menjadi bahan bakar minyak. Rancangan kondensor alur spiral yang telah dibuat dengan panjang 3 m, berdiameter 30 cm dan tinggi 34 cm menggunakan bahan besi galfanis ½ inch dan tebal plat 0.0127 mm, proses sirkulasi air pendingin menggunakan pipa besi spiral, dengan suhu uap yang masuk ke dalam kondensor 180 oC dan temperatur air pada kondensor 40 oC. dari 1000 gr sampah plastik dapat dihasilkan sebanyak 100 ml bahan bakar minyak.","PeriodicalId":20973,"journal":{"name":"Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia","volume":"145 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80484466","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":"Evaluasi Neraca Massa Kolom Deethanizer di Unit Gas Plant","authors":"Arif Nurrahman, Z. Furqon","doi":"10.33366/rekabuana.v6i2.2682","DOIUrl":"https://doi.org/10.33366/rekabuana.v6i2.2682","url":null,"abstract":"Gas Plant Unit in company X engaged in energy in Balikpapan has a design capacity of 560 tons/day. This unit serves to produce propane gas (C3H8) and butane (C4H10) to become LPG products. The Deethanizer column is a Light End fractionation unit that separates Ethane compounds from Propane and Butane at operating temperature resulting in LPG products that meet the specifications. The researcher's goal is to obtain the actual mass balance calculation and the flow rate of the process—the method used from retrieving data on operating conditions directly to the industry and performing calculations. The Deetanizer column is composed of 40 sieve trays, the entry feed of the 20th tray operates at the mass flow rate of the Deethanizer column feed of 5949,184 kg/hour, the flow rate of LPG products is 3428,334 kg/hour, and the mass flow rate of gas overhead is 150,186 kg/hour so that there is an actual % loss of 39,84%, this is because this unit should be time to be repaired. However, this does not affect the products produced, which can be seen from laboratory tests on LPG product samples.ABSTRAKGas Plant Unit diperusahaan X yang bergerak dibidang energi di Balikpapan mempunyai kapasitas desain 560 ton/hari. Unit ini berfungsi untuk memproduksi gas propane (C3H8) dan butana (C4H10) sehingga menjadi produk LPG. Kolom Deethanizer adalah unit fraksinasi Light Ends yang berfungsi untuk memisahkan senyawa Ethana dari Propana dan Butana dengan proses destilasi bertekananan sehingga menghasilkan produk LPG yang memenuhi spesifikasi. Tujuan peneliti untuk mendapatkan perhitungan neraca massa aktual serta laju alir proses. Metode yang digunakan dari pengambilan data kondisi operasi langsung ke industri serta melakukan perhitungan. Kolom Deetanizer tersusun dari 40 buah sieve tray, umpan masuk dari tray ke-20, beroperasi pada laju alir massa umpan kolom Deethanizer sebesar 5949,184 kg/jam, laju alir produk LPG sebesar 3428,334 kg/jam dan laju alir massa overhead gas sebesar 150,186 kg/jam sehingga diperoleh % yield aktual 57.62 dan % losses aktual sebesar 39,84%, hal ini disebabkan karena unit ini seharusnya sudah waktunya untuk di perbaiki. Namun hal ini tidak berpengaruh terhadap produk yang dihasilkan, hal ini dapat dilihat dari hasil uji Laboratorium mengenai Sampel Produk LPG.","PeriodicalId":20973,"journal":{"name":"Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia","volume":"110 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78623816","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":"STUDY TEMPERATUR PENYIMPANAN PADA PROSES PENIMBUNAN B30 GUNA MENGURANGI KOROSI","authors":"Steven Johanes, Oksil Venriza, B. Sugito","doi":"10.32493/JITK.V5I2.11468","DOIUrl":"https://doi.org/10.32493/JITK.V5I2.11468","url":null,"abstract":"Pressure Vessel is a vessel to contain both liquid and gasses. The storage tank is one of the tools to contain fluid, so it is an important factor in an industry such as chemistry, oil, and power plants. Biodiesel is an alternative fuel made from vegetable oil that is environmentally friendly and can reduce exhaust emissions in diesel engines. Biodiesel is renewable and reduces engine performance, so it can be used as a solution to overcome the reduced fossil fuel reserves. It is necessary to determine the corrosion rate of biodiesel. This research was conducted by storing biodiesel in the sample tank for 0 day, 1 day, and 4 days after that, the ASTM D-130 copper strip corrosion test was carried out for 3 hours ± 5 minutes. From the research, we know that corrosion rate at indoor had been stored for 4 days and for outdoor at day 0,1 and 4 gets greater corrosion with result 1b( dark orange).","PeriodicalId":20973,"journal":{"name":"Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia","volume":"56 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87330922","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":"PENGARUH PENAMBAHAN MONOGLISERIDA MINYAK NABATI TERHADAP SIFAT MEKANIS BIOPLASTIK TAPIOKA","authors":"Permatasari Putri Benedicta, Sri Sutanti","doi":"10.32493/JITK.V5I2.8761","DOIUrl":"https://doi.org/10.32493/JITK.V5I2.8761","url":null,"abstract":"Minyak nabati adalah minyak yang berasal dari tumbuhan yang selama ini penggunaannya terbatas sebagai bahan makanan dan flavor. Contoh minyak nabati adalah minyak kelapa dan minyak sawit. Pada penelitian ini, dilakukan teknologi pengolahan lanjut dari minyak kelapa dan minyak sawit menjadi monogliserida. Monogliserida kemudian diaplikasikan pada teknologi bioplastik tapioka. Penelitian ini bertujuan untuk mengetahui apakah monogliserida dapat meningkatkan sifat mekanis bioplastik tapioka. Parameter sifat mekanis bioplastik meliputi sifat ketahanan air, kuat tarik, persen elongasi, dan morfologi. Metode penelitian dilakukan dengan Rancangan Acak Kelompok 2 faktor yaitu jenis minyak nabati untuk pembuatan monogliserida (minyak kelapa sawit dan minyak kelapa) dan presentase penambahan monogliserida (0%; 0,2%; 0,4%; 0,6%; 0,8%, dan 1%). Dari hasil penelitian, didapatkan bahwa faktor jenis dan presentase monogliserida mempengaruhi sifat mekanis bioplastik tapioka. Hasil ketahanan air terbaik BDPMK dan BDPMS pada presentase 1%, kuat tarik terbaik pada presentase 0,6%, persen elongasi terbaik pada presentase 0,8%, dan morfologi BDPMK lebih halus dibandingkan morfologi film BDPMS. Dari hasil keseluruhan dapat disimpulkan bahwa monogliserida dapat menggantikan fungsi minyak nabati, gliserol dan emulsifier secara bersamaan dengan jenis monogliserida minyak kelapa lebih dianjurkanKata kunci : BioplastiK, minyak kelapa, minyak nabati, minyak sawit, monogliserida","PeriodicalId":20973,"journal":{"name":"Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91135414","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":"Yield Bioethanol From Pineapple Skin Waste With Yeast Mass And Fermentation Time","authors":"Siti Khuzaimah","doi":"10.32493/JITK.V5I2.10932","DOIUrl":"https://doi.org/10.32493/JITK.V5I2.10932","url":null,"abstract":"Buah nanas merupakan buah yang umum dimanfaatkan masyarakat Indonesia sebagai bahan makanan. Dengan besarnya produksi nanas maka jumlah limbah yang dihasilkan juga besar terutama limbah kulit nanas. Kandungan gula yang cukup tinggi dari hasil penelitian diketahui kandungan glukosa sebesar 15,6 % sehingga dapat dimanfatkan untuk menghasilkan bioethanol dengan proses fermentasi selanjutnya dengan distilasi. Tujuan dari penilitain ini untuk menentukan besarnya etanol tertingi pada variasi waktu fermentasi dan berat yeast. Proses pembuatan bioethanol tahap awal melalui proses ekstraksi dihasilkan sari kulit nanas selanjutnya tahap fermentasi pada pH 4,5 dengan menggunakan yeast dan urea agar pertumbuhan dan perkembangbiakan yeast optimal. Untuk memisahkan etanol dengan proses distilasi. Dalam penelitian ini dilakukan variasi waktu fermentasi 2,4,6,8,10 dan 12  hari dan variasi berat yeast 2,4,6,8,dan 12 gram. Hasil penelitan didapat untuk waktu fermentasi yang optimal menghasilkan yield etanol tertinggi pada 6 hari fermentasi sebesar 32,45 % sedangkan berat yeast yang digunakan untuk menghasilkan yield etanol yang optimal dengan berat 4 gram dan yield etanol sebsar 30,78%.  ","PeriodicalId":20973,"journal":{"name":"Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia","volume":"164 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77696636","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":"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":"22 1","pages":""},"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":"104 2 1","pages":""},"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":"49 1","pages":""},"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}