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All Journal Jurnal Serambi Engineering Kinetika International Journal of Research in Vocational Studies (IJRVOCAS) Aptekmas : Jurnal Pengabdian Kepada Masyarakat JUSTE (Journal of Science and Technology) Innovative: Journal Of Social Science Research
Selastia Yuliati
Politeknik Negeri Sriwijaya
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The Application of Vacuum Valve Technology as AFR Settings in 3500 Watt Electric Generator Operated by Methane Gas Tri Widagdo; Eka Satria Martomi; Ella Sundari; Selastia Yuliati
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 2 No. 1 (2022): IJRVOCAS - April
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v2i1.97

Abstract

The scarcity of fuel oil, especially the gasoline type, is now a national problem that needs to be solved. This is caused by the rapid growth of industry and transportation. On the other hand, the problem of handling wet garbage has not been maximal, causing pollution that can disrupt health. The impact of this problem is felt also in the use of household-scale generators that operate using gasoline fuel. This study aims to convert gasoline to methane gas in the operation of a 3500 Watt Generator (Electric Generator Set). Methane gas (CH4) is obtained from the gasification process of wet waste. The method used for the AFR (Air-Fuel Ratio) regulator is the use of vacuum valve components. The use of this method cannot be separated from the easy aspects of the maintenance/repair, easy to make and cheap price. The target to be achieved in this research is to get performance data of generators operated with Methane gas fuel. The generator which is used as a research object is a generator household scale with a maximum power of 3500 Watt. Results variables to be observed among other: engine efficiency as well as optimum engine AFR generator. Furthermore, the data is compared with the data generated generator that uses gasoline fuel. This research is an experimental study, starting with the design of the vacuum valve component, followed by the installation of the component on the generator machine and ending with a machine test. The experimental data on the generator with the nominal power of 3500 Watt is: Operated by Gasoline, the optimum power, Popt is 3750 Watt, Max. efficiency, ηmax is 62.2%; AFRopt is 6.7, then operated by methane gas, optimum. power, Popt is 3270 Watt, Max efficiency, ηmax is 66,1%, AFRopt is 7,2. So, gas methane can be used to replace gasoline to operate 3500 Watt generator.
PENGELOLAAN LINGKUNGAN DENGAN CARA MEMANFAATKAN FLY ASH BATUBARA SEBAGAI BAHAN BAKU MEMBRAN SILIKA DALAM UPAYA MEMINIMALISIR LIMBAH B3 DI PT SEMEN BATURAJA OKU Lety Trisnaliani; Indah Purnamasari; Ahmad Zikri; Selastia Yuliati
Aptekmas Jurnal Pengabdian pada Masyarakat Vol 1 No 2 (2018): APTEKMAS Volume 1 Nomor 2 2018
Publisher : Politeknik Negeri Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1014.43 KB) | DOI: 10.36257/apts.v1i2.1241

Abstract

The target of community service assignments in 2018 is productive communities that need development in the field of environmental management, namely employees of the Quality Control Laboratory of PT. Semen Baturaja OKU. Coal ash is a waste unlike gas from combustion, because it is a solid material that is not easily dissolved and is not volatile so it will be more troublesome in handling. If the amount is large and is not handled properly, then the coal ash can pollute the environment especially caused by fly ash and can be sucked by humans and animals can also affect the condition of the surrounding water and soil so that it can kill the plants. The chemical composition of Fly ash is silica, alumina and iron with little calcium, magnesium, sulfate, and other components. Currently coal fly ash is used in cement plants as a mixture of concrete makers. Because of the smoothness and round shape of the granules, the use of fly ash on the concrete mixture can increase the slack on the concrete mixture. The advantages of using fly ash include increasing the strength of concrete, filling the pores in the concrete so that the porosity of the concrete becomes low, while increasing the density of concrete so that it can increase the tightness of concrete to water. The coal fly ash waste that accumulates also occurs in the industry of PT Semen Baturaja Ogan Komering Ulu. PT. Semen Baturaja is one of the largest cement industries in Sumatra that produces PCC (Portland Composite Cement). PCC type cement is cement made by utilizing inorganic additives such as fly ash and trass. Aside from being an additional material for cement, fly ash can also be used as a raw material for making silica membranes which serves to reduce metal content in acid mine drainage. So that the author wishes to socialize the employees and employees of PT Semen Baturaja especially in the BTA II Quality Control laboratory division to disseminate knowledge about the benefits of coal fly ash as raw material for silica membranes in minimizing B3 waste so that environmental management with a friendly environment will achieved.
PENYULUHAN PENANGANAN LIMBAH HASIL PEMBUATAN KAIN TENUN TRADISIONAL DI KELURAHAN 10 ULU KERTAPATI PALEMBANG Selastia Yuliati; Andanti Pratiwi; Anisa Nabillah; Anisah Luthfiyah
Aptekmas Jurnal Pengabdian pada Masyarakat Vol 4 No 4 (2021): APTEKMAS Volume 4 Nomor 4 2021
Publisher : Politeknik Negeri Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (620.603 KB)

Abstract

South Sumatra songket woven fabric is made through a dyeing process using a lot of dyes including Reacsol Yellow P-G or Rhodamin B which uses a lot of phenol and organic compounds. These dyes when disposed of directly will cause pollution. The purpose of this activity is to provide counseling on how to handle the waste from the weaving industry. The method applied in this activity is conducting surveys, making waste treatment tanks, and followed by questions and answers and counseling at partner locations. The results of this activity obtained one unit of a waste treatment tub equipped with advanced purification equipment, it is hoped that with this tool the level of pollution caused by the disposal of waste from the weaving industry in the form of dyes in South Sumatra can be reduced.
ANALYSIS OF BASE SEDIMENT & WATER EFFECT ON INTERNAL CORROSION RATE OF PIPELINE API 5L Gr B: ANALYSIS OF BASE SEDIMENT & WATER EFFECT ON INTERNAL CORROSION RATE OF PIPELINE API 5L Gr B Muhammad iqbal Pangindoman; Ahmad Zikri; Selastia Yuliati
KINETIKA Vol. 13 No. 03 (2022): KINETIKA 01112022
Publisher : Politeknik Negeri Sriwijaya

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Abstract

Base Sediment & Water (BS&W) is indicated high has to be as a corrosion factor in the pipeline. Corrosion is the damage or degradation of metals due to oxidation-reduction reactions between a metal and various substances in its environment which produce unnecessary compounds. Corrosion can be influenced by several factors, such as NaCl content, BS&W composition, dissolved gas content, pH, flow rate and temperature. The composition of BS&W can have an impact on the corrosion rate of the API 5L Gr B steel pipe.   Keywords : Pipeline, BS&W, Corrosion Rate
PEMBUATAN METIL ESTER SULFONAT DARI METIL ESTER BERBASIS CRUDE PALM OIL DENGAN VARIASI WAKTU DAN AGENT SULFONASI: MANUFACTURING METHYL ESTER SULFONATE FROM CRUDE PALM OIL-BASED METHYL ESTER WITH VARIATION OF TIME AND SULFONATION AGENT Dian Anisa Destryanti; Jaksen; Selastia Yuliati
KINETIKA Vol. 13 No. 03 (2022): KINETIKA 01112022
Publisher : Politeknik Negeri Sriwijaya

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Abstract

Surfactants are chemical compounds that are surface active that can reduce surface tension. Methyl Ester Sulfonate (MES) is an anionic surfactant that can be produced from the reaction of methyl esters made from vegetable oils with sulfonating agents. Palm oil is vegetable oils that can be produced as MES surfactants. This study aims to make MES from methyl esters based on Crude Palm Oil (CPO) with various sulfonating agents (NaHSO3; Na2S2O5; H2SO4 ) and time variations (120; 150; 180; 210; 240 minutes). To speed up the reaction in the sulfonation process, the addition of a 2% Al2O3 catalyst was used. The process of making MES is through the sulfonation process, the next process is the process of purification, neutralization, and drying. The results obtained the best sulfonating agent, namely Na2S2O5 at 240 minutes with a surface tension value of 26.2421 dyne/cm, an acid number of 1.6830 mg KOH/g MES and emulsion stability up to 10 minutes.
Pengolahan Limbah Cair Industri Kain Jumputan Untuk Menurunkan Zat Warna Dengan Menggunakan MembranPolysulfonSecara Ultrafiltrasin : PENGOLAHAN LIMBAH CAIR INDUSTRI KAIN JUMPUTAN UNTUK MENURUNKAN ZAT WARNA DENGAN MENGGUNAKAN MEMBRAN POLYSULFON SECARA ULTRAFILTRASI Putri Chairani Putri Chairani; Selastia Yuliati; Jaksen
KINETIKA Vol. 13 No. 03 (2022): KINETIKA 01112022
Publisher : Politeknik Negeri Sriwijaya

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Abstract

Palembang Jumputan Fabric, or commonly called Rainbow Fabric, one of the crafts produced with the jumputan technique, (Tie and Dye) is a technique of dyeing fabric by dipping it in colored ink, by adding silk and satin materials with a natural mixture of coloring method of natural and chemical origins. There have been many studies regarding the treatment of jumputan fabric wastewater using adsorbents, but this method has a weakness. Similarly, it allows the adsorbent to be left behind in the jumputan fabric wastewater. The purpose of this research is to treat the liquid waste of jumputan fabric with polysulfone membrane to reduce dry stuff . The membrane will be made using DMAc solvent and a PEG 400 additive with a composition of 18% polysulfone; 62% Dmac; and 20% PEG. The liquid waste of jumputan cloth will be purified with polysulfone membrane by ultrafiltration. In this study, the liquid waste of jumputan fabrics with variations of PAC Coagulants 500 ppm, 1000 ppm, and 1500 ppm was used, as well as with pressure variations of 0.5, ; 1; 1.5 , and 2 bars. From the results of the study, it was found that the rejection of the dye was 23.69%. Keywords: Liquid Waste, Polysulfone, Ultrafiltration
Analisa Perubahan Waktu terhadap Kualitas Hasil Pengeringan Daun Kelor (Moringa oleifera) menggunakan Photovoltaic Tray Dryer Martha Aznury; Muhammad Delika Maulidi; Selastia Yuliati
JUSTE (Journal of Science and Technology) Vol. 1 No. 2 (2021): JUSTE
Publisher : LLDIKTI WIlayah XII Ambon

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (471.701 KB) | DOI: 10.51135/justevol1issue2page175-181

Abstract

Tanaman Kelor adalah salah satu tanaman paling luar biasa yang pernah ditemukan. Salah satu khasiat yang bisa diambil dari pohon kelor terdapat pada daunnya. Daun kelor yang sudah dikeringkan memiliki kandungan gizi yang lebih banyak. Mengingat hal tersebut, maka dirancanglah alat photovoltaic tray dryer yang merupakan alat pengering yang memanfaatkan sinar matahari melalui Photovoltaic Solar Energy System (SESF). Photovoltaic tray dryer dengan kapasitas empat rak dengan berat 100 gram daun kelor per rak. Sebelum melakukan proses pengeringan, daun kelor dilakukan pengujian kadar air awal. Proses pengeringan dilakukan pada variasi waktu yaitu 30, 60, 90, 120, 150, 180, 210, dan 240 menit selama empat jam pada pengeringan dengan suhu 60°C. Setiap 30 menit daun kelor ditimbang. pada rak 1, 2, 3 dan 4 untuk menentukan kadar air. Kadar air daun kelor kering yang diharapkan setelah dikeringkan kurang dari 10%. Kadar air daun kelor pada tiap nampan mulai dari rak 3, 2, 2, dan 4  masing-masing adalah42,48%, 44,16%, 64,80% dan 69,92%. Efisiensi pengeringan mengalami penurunan, dengan efisiensi 30 menit sebesar 26,99% dan efisiensi 240 menit sebesar 14,28%.
Membran Selulosa Asetat Berbasis Nata De Coco Ditinjau Dari Pengaruh Penambahan Zat Aditif Polyethylene Glycol (PEG) Terhadap Permeabilitas (Fluks) deswi fransiska; Selastia Yuliati; Robert Junaidi
Jurnal Serambi Engineering Vol 8, No 4 (2023): Oktober 2023
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v8i4.6739

Abstract

Teknologi membran digunakan dalam industri untuk proses pemisahan maupun pemurnian.  Salah satu jenis polimer yang sering digunakan untuk membuat membran adalah selulosa asetat yang diperoleh dari Nata de coco. Tujuan dari penelitian ini untuk melihat pengaruh penambahan zat aditif polyethylene glycol terhadap karakterisasi dan kinerja membran selulosa asetat. Penambahan zat aditif polyethylene glycol, 10%, 17%, dan 28% dengan pelarut diklorometana 50% dan selulosa asetat 18%. Membran yang didapatkan dilakukan pengujian morfologi  dan uji fluks membran. Hasil morfologi membran yang memenuhi syarat ultrafiltrasi adalah membran A didapatkan ukuran pori 0,618 µm, dan membran B sebesar 0,972 µm. hasil uji fluks rata-rata didapatkan 15,494 L/m2.jam  untuk penambahan zat aditif 10%, 17,764 L/m2.jam  untuk penambahan zat aditif 17% dan 19,455 L/m2.jam untuk penambahan zat aditif 28%. Hasil yang diperoleh menunjukkan bahwa pengaruh zat aditif  pada membran selulosa asetat yaitu semakin banyak komposisi zat aditif maka semakin besar nilai fluks dan ukuran pori membran.
Laju Pengeringan Chip Ubi Kayu Menggunakan Alat Tray Dryer Galindra Pramudya Wardhana; Selastia Yuliati; Yulianto Wasiran
Innovative: Journal Of Social Science Research Vol. 3 No. 5 (2023): Innovative: Journal of Social Science Research
Publisher : Universitas Pahlawan Tuanku Tambusai

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Abstract

Ubi kayu merupakan salah satu bahan pangan yang biasa digunakan untuk makanan ringan. Pengeringan ubi kayu merupakan salah satu proses yang bertujuan untuk mengurangi kadar air pada ubi kayu dan meningkatkan kualitas produk terutama pada daya simpan yang tahan lama. Pengeringan yang biasa digunakan dengan menggunakan metode konvensional yang memiliki kekurangan, yaitu penggunaan waktu pengeringan yang relatif lama dan kehigienisan tidak terjaga dengan baik. Pengeringan ubi kayu dengan alat Tray Dryer sebagai media pengeringannya. Pada penelitian ini dilakukan kajian terhadap waktu dan laju pengeringan. Variabel yang digunakan, yaitu waktu pengeringan sebesar 15 menit, 30 menit, 45 menit, 60 menit, 75 menit, 90 menit, 105 menit, dan 120 menit serta temperatur pengeringan sebesar 70°C, 80°C, dan 90°C. Penelitian ini menggunakan analisis kadar air. Laju pengeringan mempengaruhi chip ubi kayu yang dihasilkan, yaitu pada temperatur 80°C dengan kadar air 22,75%.
Co-Authors Andanti Pratiwi Anisa Nabillah Anisah Luthfiyah deswi fransiska Dian Anisa Destryanti Eka Satria Martomi Ella Sundari Galindra Pramudya Wardhana Indah Purnamasari Jaksen Lety Trisnaliani Martha Aznury Muhammad Delika Maulidi Muhammad iqbal Pangindoman Putri Chairani Putri Chairani Robert Junaidi Tri Widagdo Wasiran, Yulianto Zikri, Ahmad