Eksergi Pub Date : 2022-04-05 DOI: 10.31315/e.v0i0.5304

Diah Mahmuda

引用次数: 0

Mathematical Model of Water Absorption in Arrowroot Starch-Chitosan Based Bioplastic 竹淀粉-壳聚糖基生物塑料吸水率的数学模型

Eksergi Pub Date : 2022-04-05 DOI: 10.31315/e.v19i1.6310

Yusmardhany Yusuf, F. Irfandy, Alit Istiani

{"title":"Mathematical Model of Water Absorption in Arrowroot Starch-Chitosan Based Bioplastic","authors":"Yusmardhany Yusuf, F. Irfandy, Alit Istiani","doi":"10.31315/e.v19i1.6310","DOIUrl":"https://doi.org/10.31315/e.v19i1.6310","url":null,"abstract":"Expansion of the size of the weight of bioplastics often occurs in daily use. This phenomenon happens because the material from bioplastics can absorb significant amounts of water. This process can lead to accumulation of swelling degree. Therefore, a mathematical model is needed to quantify this mechanism to predict the dynamics of changes in the weight of bioplastics with respet to time while contact with water to help practitioners during application design for the use of bioplastics. This study aims to build a mathematical model derived from the mass sense validated by experimental data through curve fitting. The experiment was conducted by observing the rate of change in the mass of bioplastic made from starch and chitosan by measuring the change in mass concerning time immersed in water under atmospheric conditions. The immersion time was varied between 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30, 40,50, and 60 minutes. As a result, it can be concluded that starch-chitosan-based biofilms can absorb water up to ±10.9174 gr-water/gr-bioplastic, and also this phenomenon can be quantified by a mathematical equation that derived from mass balance with an average percent error of 1.13% and R-squared coefficient of 0.9981. ","PeriodicalId":30703,"journal":{"name":"Eksergi","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46175720","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}

引用次数: 0

Separation of Mineral from Brown Algae Extract using Micro Filtration (MF) and Ultra Filtration (UF) Membrans – Review 微滤(MF)和超滤(UF)膜分离褐藻提取物中矿物质的研究进展

Eksergi Pub Date : 2022-04-05 DOI: 10.31315/e.v19i1.6653

Mahreni Mahreni

{"title":"Separation of Mineral from Brown Algae Extract using Micro Filtration (MF) and Ultra Filtration (UF) Membrans – Review","authors":"Mahreni Mahreni","doi":"10.31315/e.v19i1.6653","DOIUrl":"https://doi.org/10.31315/e.v19i1.6653","url":null,"abstract":": Brown algae ( Phaeophyta ) contain active compounds such as carbohydrates, proteins, phenolics, fats, pigments, vitamins and minerals. The mineral content of brown algae is around 8% to 40% consisting of cations Na + , K + , Mg ++ , Fe ++ , Zn ++ , Mn ++ and heavy metals. Bioactive brown algae has many benefits, including Fucoidan as a cancer drug. The barrier of using Fucoidan as a medicine is its high mineral content. Therefore, the minerals must be separated. The extraction process of brown algae using various methods has been carried out with the aim of isolating the active component of Fucoidan that is free from minerals that will be an obstacle in utilizing the active component. This paper will describe some of the latest methods of extracting the active ingredients of brown algae and mineral separation processes using Micro Filtration (MF) and Ultra Filtration (UF) membrane. MF and UF membrane can separate small molecules such as cations (minerals) that can pass through the membrane so that macromolecules such as carbohydrates, fats, proteins, pigments, phenolics and vitamins can be separated from minerals and active ingredients in the absence of minerals can be obtained. The purpose of this paper is to provide research directions in the exploration of the active ingredients of brown algae for pharmaceutical and cosmetic applications without side effects caused by high metal or mineral content above the threshold value in brown algae extracts.","PeriodicalId":30703,"journal":{"name":"Eksergi","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48017771","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}

引用次数: 0

PERBAIKAN WAKTU KERJA DENGAN MENGGUNAKAN MICROMOTION STUDY DAN PENERAPAN KAIZEN DALAM MENINGKATKAN PRODUKTIFITAS DI PERUSAHAAN MAINAN ANAK PT. XY 在工作时间上的改进，使用微运动和凯思恩在提高PT. XY儿童玩具公司的生产力方面的应用

Eksergi Pub Date : 2022-01-31 DOI: 10.32497/eksergi.v18i1.3215

Ayu Nurul Haryudiniarti, Brainvendra Widi Dionova, S. Sudirman, Karmin Karmin, Al Hariyanto Al Hariyanto, Kun Harjiyanto, A. Hapsari

{"title":"PERBAIKAN WAKTU KERJA DENGAN MENGGUNAKAN MICROMOTION STUDY DAN PENERAPAN KAIZEN DALAM MENINGKATKAN PRODUKTIFITAS DI PERUSAHAAN MAINAN ANAK PT. XY","authors":"Ayu Nurul Haryudiniarti, Brainvendra Widi Dionova, S. Sudirman, Karmin Karmin, Al Hariyanto Al Hariyanto, Kun Harjiyanto, A. Hapsari","doi":"10.32497/eksergi.v18i1.3215","DOIUrl":"https://doi.org/10.32497/eksergi.v18i1.3215","url":null,"abstract":"Sudah menjadi pengetahuan umum bahwa industri manufaktur perkembangannya semakin meningkat dari waktu ke waktu sehingga para pelaku industripun harus selalu siap berkompetisi. Masalah dan faktor-faktor yang berhubungan dengan peningkatan produktifitas tetap perlu dan layak untuk diteliti agar tercipta peningkatan produktivitas yang sesuai dengan harapan dari para pelaku industri. PT. XY merupakan salah satu perusahaan mainan anak yang ingin melakukan perbaikan metode kerja dan waktu kerja dalam usaha meningkatkan produktivitas. Metode yang digunakan dalam penelitian ini adalah menggunakan Micromotion Study dan Kaizen yang kemudian dituangkan dalam peta tangan kiri dan tangan kanan. Pengolahan data dan pembahasan dilakukan dengan membuat data pengukuran yang terdiri dari waktu perakitan sebelum dan sesudah menggunakan analisis Micromotion Study dan Kaizen, data pengamatan tersebut kemudian dituangkan dalam peta tangan kanan dan tangan kiri. Tujuan dari penelitian ini adalah mendapatkan perbaikan rancangan kerja (redesign) dan pengurangan waktu pekerjaan di bagian perakitan balok dan pengemasan. Hasil dari penelitian ini didapatkan penurunan waktu kerja sebesar 144 detik dimana waktu sebelum perbaikan sebesar 424 detik, setelah perbaikan sebesar 280 detik, dan hasil dari kaizen berupa perbaikan lay out kerja di lokasi perakitan dan pengemasan balok kayu di PT. XY.","PeriodicalId":30703,"journal":{"name":"Eksergi","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42979315","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}

引用次数: 0

RANCANG BANGUN BATTERY PACK LITHIUM 48 V 50 AH 冉仓班君电池组锂48 v 50 ah

Eksergi Pub Date : 2022-01-31 DOI: 10.32497/eksergi.v18i1.3227

Nur Aidi Ariyanto, Faqih Fatkhurrozak, Donny Prasetio

{"title":"RANCANG BANGUN BATTERY PACK LITHIUM 48 V 50 AH","authors":"Nur Aidi Ariyanto, Faqih Fatkhurrozak, Donny Prasetio","doi":"10.32497/eksergi.v18i1.3227","DOIUrl":"https://doi.org/10.32497/eksergi.v18i1.3227","url":null,"abstract":"The electric vehicle is a vehicle with a driving source of an electric motor, requiring a battery for the stored energy. Battery packs are widely used as energy storage for electric vehicles. The battery pack is a series of several small batteries arranged in series and parallel so that they have an output voltage and capacity as required. 18650 Lithium battery is the most widely used to make battery packs and used on electric motorcycles. a 18650 Lithium battery has an output voltage of 3.7 V with various capacities such as 1500 mAh, 2000 mAh, 3000 mAh, etc. To design a 48 V 50 Ah battery pack requires a series of 18650 3.7 V 3000 mAh batteries which are arranged 13 pieces in series and 19 pieces in parallel. Before assembling, each 18650 battery must be checked for voltage, the voltage in each 18650 battery must be in the range of 3 – 4.2 V. If it is less than 3 V then it needs to be recharged, if it is less than 2 V then the battery condition is not good. The battery pack discharging test is carried out by loading a BLDC 2000W 48V electric motor until the battery pack voltage drops to 39 V. The discharging process lasts for 13 hours with an average current of 3.5 A. From the test results, the battery pack capacity can be calculated, namely 45.5 Ah.","PeriodicalId":30703,"journal":{"name":"Eksergi","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46366512","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}

引用次数: 0

KOPER PORTABLE BERBASIS SEL SURYA SEBAGAI SOLUSI TANGGAP BENCANA 一种以太阳能为基础的便携式电池应对灾难

Eksergi Pub Date : 2022-01-31 DOI: 10.32497/eksergi.v18i1.3219

Qoriatul Fitriyah, E. Saragi, B. Nugroho, Albertus Agung DanatyoSetyawan, M. PrihadiEko W

引用次数: 1

PENGONTROLAN TEGANGAN PADA PROTON EXCHANGE MEMBRANE FUEL CELL (PEM-FC) MENGGUNAKAN PARTICLE SWARM OPTIMIZATION DAN PID 质子交换膜燃料电池的设计采用粒子群优化和PID

Eksergi Pub Date : 2022-01-31 DOI: 10.32497/eksergi.v18i1.3209

P. Saputra, M. Misbah

引用次数: 0

ANALISIS PENGARUH KETINGGIAN AIR TERHADAP KINERJA PEMBANGKIT LISTRIK TENAGA MIKROHYDRO (PLTMH)-PPI MADIUN 分析水位对水力发电厂(PLTMH)-PPI MADIUN的影响

Eksergi Pub Date : 2022-01-31 DOI: 10.32497/eksergi.v18i1.2988

Akhwan Akhwan, S. Sunardi

引用次数: 0

PERENCANAAN SURVEY SEBARAN POTENSI ENERGI TERBARUKAN PADA PEMBANGKIT LISTRIK TENAGA SURYA (PLTS) TERAPUNG PROVINSI JAWA BARAT BERBASIS VISUALISASI DAN LAYOUTING PETA QGIS 3.16 调查提供的一定数量的能源潜力SURYA列表的PLTS结果与一定数量的可视化和布局有关PETA QGIS 3.16

Eksergi Pub Date : 2022-01-31 DOI: 10.32497/eksergi.v18i1.3222

Enno Agdelliano Diniardi, Wahyu FarrosHariyadi, Muhammad Iqbal, Moh. FarisSyaifullah, Prayudi Wahyu Dewantara, Siti Diah Ayu Febriani

{"title":"PERENCANAAN SURVEY SEBARAN POTENSI ENERGI TERBARUKAN PADA PEMBANGKIT LISTRIK TENAGA SURYA (PLTS) TERAPUNG PROVINSI JAWA BARAT BERBASIS VISUALISASI DAN LAYOUTING PETA QGIS 3.16","authors":"Enno Agdelliano Diniardi, Wahyu FarrosHariyadi, Muhammad Iqbal, Moh. FarisSyaifullah, Prayudi Wahyu Dewantara, Siti Diah Ayu Febriani","doi":"10.32497/eksergi.v18i1.3222","DOIUrl":"https://doi.org/10.32497/eksergi.v18i1.3222","url":null,"abstract":"Pembangkit Listrik Tenaga Surya (PLTS) terapung adalah peralatan pembangkit listrik yang mengubah daya matahari menjadi listrik. PLTS sering juga disbut Solar Cell, atau Solar Photovoltaik. Sistem PLTS terapung ini dipasang di atas perairan waduk atau danau. Energi surya merupakan salah satu sumber energi terbarukan yang melimpah dan menarik perhatian peneliti dalam beberapa dekade terakhir ini. Tingginya polusi udara dan laju pertumbuhan konsumsi energi mendorong setiap negara untuk mengoptimalkan segala potensi energi terbarukan dan optimalisasi pemanfaatan PLTS terapung di daerah Jawa Barat. Berdasarkan masalah tersebut penelitian ini bertujuan untuk mengoptimalisasi pemanfaatan PLTS terapung di Jawa Barat dengan menggunkan aplikasi QGIS. Penelitian ini diawali dengan melakukan studi literatur, identifikasi masalah, penentuan kriteria perencanaan survey potensi, pengolahan data, hingga visualisasi layouting peta pada aplikasi QGIS. Berdasarkan analisis data dan hasil pemetaan didapatkan di daerah jawa barat yaitu ada 7 waduk yang terletak di daerah Kabupaten Bogor, Kabupaten Cianjur, Kabupaten Purwakarta, Kabupaten Cimahi, Kabupaten Majalengka, Kabupaten Sumedang, Kabupaten bandung barat, Kabupaten Kuningan. Dengan demikian digitalisasi ini dapat menjadi acuan bagi pemerintah untuk mengoptimalkan potensi PLTS terapung di Jawa Barat. Kata Kunci: PLTS, QGIS 3.16, terapung, inovasi energi, teknologi, energi surya","PeriodicalId":30703,"journal":{"name":"Eksergi","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41880318","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}

引用次数: 0

TINJAUAN SINGKAT OPTIMALISASI PENGGUNAAN GAS BUMI PADA SEKTOR RUMAH TANGGA 温习家用天然气在家庭部门的优化使用情况

Eksergi Pub Date : 2022-01-31 DOI: 10.32497/eksergi.v18i1.2657

Ligan Budi Pratomo, B. Tk

{"title":"TINJAUAN SINGKAT OPTIMALISASI PENGGUNAAN GAS BUMI PADA SEKTOR RUMAH TANGGA","authors":"Ligan Budi Pratomo, B. Tk","doi":"10.32497/eksergi.v18i1.2657","DOIUrl":"https://doi.org/10.32497/eksergi.v18i1.2657","url":null,"abstract":"Ketergantungan terhadap impor minyak mentah untuk pemenuhan kebutuhan LPG semakin meningkat. Total kebutuhan LPG nasional sendiri mencapai 6.642.633 MTon pada tahun 2016. Melihat kondisi tersebut pemerintah terus berupaya untuk melakukan substitusi penggunaan LPG ke gas bumi pada sektor rumah tangga. Mengingat cadangan gas bumi nasional sangat besar yaitu mencapai 144,06 TSCF pada tahun 2016. Penggunaan gas bumi untuk rumah tangga dapat diwujudkan dengan pembangunan jaringan distribusi gas. Namun terdapat beberapa faktor menjadi tantangan dalam pengembangan gas bumi untuk rumah tangga ini, seperti insfrastruktur yang masih sedikit, faktor keamanan jaringan terhadap potensi kebocoran, dan harga gas bumi. Upaya peningkatan pembangunan insfrastruktur untuk pemanfaatan gas bumi harus dilakukan, salah satunya dengan menambah jumlah jaringan gas sebanyak 16.000 sambungan. Upaya tersebut diharapkan dapat mengoptimalkan pemanfaatan gas bumi pada sektor rumah tangga. Pada dasarnya penggunaan gas bumi sebagai pengganti LPG terbukti lebih hemat dan ramah lingkungan. Hal tersebut telah dibuktikan oleh penelitian di kota Bontang dan Bojonegoro. Keuntungan tersebut menjadikan pengguna gas bumi untuk rumah tangga meningkat dari tahun 2013 sampai 2020. Dimana pada tahun 2020 pengguna gas bumi untuk sektor rumah tangga telah mencapai 673.000 sambungan rumah. Kemudian pemerintah juga telah menargetkan pengguna gas bumi sebanyak 794.000 sambungan rumah tangga di tahun 2021.","PeriodicalId":30703,"journal":{"name":"Eksergi","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49090578","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}

引用次数: 0

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