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PERVAPORATION TECHNOLOGY DEVELOPMENT FOR ABSOLUTE ETHANOL PRODUCTION (ETHANOL FUEL GRADE) Aswan, Arizal; Yuliati, Selastia; Junaidi, Robert
KINETIKA Vol 3, No 3 (2012): KINETIKA 01112012
Publisher : Teknik Kimia Politeknik Negeri Sriwijaya

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Abstract

Membrane pervaporation of ethanol vapor is a purification process based on grade with a purity level is high enough, so that the resulting product is called fuel grade ethanol. Fuel grade the process of increasing ethanol used as a fuel alternative. In this study the ethanol content is done by pervaporation technology method that utilizes a cellulose nitrate membrane separation media. Studies have been conducted on the effect of pressure on the value of the permeate flux and membrane selectivity in pervaporation process. Results showed that operating conditions at a temperature of 100 - 140oC, linear flow rate of 2.5 m3/ h, the variation of permeate side pressure of 500 mbar, 550 mbar, 600 mbar, 650 mbar and 700 mbar produces flux and selectivity values are declining. Optimum conditions reached at permeate side pressure is 700 mbar with the flux values 3.4673 x 10-5 Kg/m2.h and selectivity 0.1257. In these conditions the produce fuel grade ethanol yield reached 99.48%. Ethanol is converted into fuel feed grade reaches ± 99%, with a total volume of 193 ml of the feed volume 200 ml.
UNJUK KERJA ROTARY DRYER PADA PROSES PENGERINGAN BIJI KOPI Yuliati, Selastia
KINETIKA Vol. 9 No. 3 (2018): KINETIKA 01112018
Publisher : Politeknik Negeri Sriwijaya

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Abstract

The dryingprocess is an important step of drying coffee. At present there are mechanical dryer for drying of coffee, oneof them is a rotary dryer for finned heater, as a heat source.Rotary system in this study was used to dry the coffee beans to a minimum water content of 12%, according to the SNI standard, calculate the thermal drying efficiency, calculate the heat transfer coefficient, and calculate the drying rate. The test parameters in this study were drying temperatures varied from 30 ËšC to 70 ËšC and a drying time of 6.5 hours. The results of this study are the value of thermal efficiency obtained ranged from 68.8 - 79%, with a decrease in water content from coffee beans ranging from 25.2 - 11.98%. The value of the heat transfer coefficient in the rotary dryer device is 390.49 - 481.63 kJ / hour. m2oC. The value of drying rate is 1.75 - 2.06 kg / hour.m2 . From the results of calculations and analysis, the optimal drying temperature to desired SNI standards is found at a drying temperature of 70ËšC with a drying time of 390 minutes. The performance of the rotary dryer is very good with thermal efficiency values above 60%
RANCANG BANGUN TRAY DRYER SISTEM HYBRID (SURYA-HEATER) UNTUK PENGERINGAN IKAN ASIN Yuliati, Selastia; Kalsum, Leila; Junaidi, Robert; HC, Fadarina; Azizah, Roro Rizqi Ramadhani; Utami, Winda Andea; Ningrum, Galuh Martiyah
KINETIKA Vol. 11 No. 2 (2020): KINETIKA 01072020
Publisher : Politeknik Negeri Sriwijaya

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Abstract

Drying process on salted fish is one of the factors that determine the quality of the products produced. Conventional drying has many weaknesses, namely fluctuating heat, poor hygiene and requires a large enough space and can affect product quality. One of alternatives in drying salted fish is using a hybrid system tray dryer with a solar energy source with additional electrical energy (heater). This study aimed to design a tray dryer with hybrid system (solar-heater), obtained the performanced of the dryer based on drying rate, heat transfer and heat efficiency of the hybrid system tray dryer (solar-heater), and obtained salted fish that met the water content standards based on SNI No. 01-2721- 2009. The treatments varied were drying time of 60 minutes, 120 minutes, 180 minutes, 240 minutes and 300 minutes and the variations of drying temperature of 60oC, 70oC and 80oC. The results showed that the optimum drying conditions were drying using temperature of 70oC with a drying time of 300 minutes, a moisture content of 31.2%, a drying rate of 0.1492 kg/hour m2, a conduction heat transfer rate is 52.01 J, a convection heat transfer rate is 71.15 J, a radiation heat transfer rate is 0.048 J and heat efficiency of 53.28%.
PENGOLAHAN AIR PAYAU MENJADI AIR BERSIH MENGGUNAKAN METODE ELEKTROKOAGULASI Kaslum, Leila; ., Fadarina; Meidinariasty, Anerasari; Yuliati, Selastia; Syakdani, Adi; Pratama, M.Bagas; Alpitansyah, Rachmad Bayu; Alnafrah, Fenty; Ismareni, Pepi
KINETIKA Vol. 12 No. 1 (2021): KINETIKA 01032021
Publisher : Politeknik Negeri Sriwijaya

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Abstract

The limitation of clean water resources in coastal areas is related to the scarcity of fresh water. Water that has too high a salinity can cause harm if it is used for certain activities, for example, it is dangerous for health when used as drinking water, causing crop failure for agriculture, corrosion for equipment and buildings made of metal elements. In order to be used as clean water and suitable for daily household use, brackish water needs special treatment with the aim of reducing the mineral content in it, especially in reducing salinity levels. For this purpose brackish water treatment has been made into clean water which works based on the electrocoagulation process. The performance test was carried out by filling 10 liters of brackish water into the electrocoagulation reactor and using an electric current of 10 volts, 12 volts and 14 volts for each test. The observation times for each test were 60, 120 and 180 minutes. Measurement of salinity, iron, sulfate and organic substances for each test was carried out using a potentiometer, atomic absorption spectrophotometer, turbidimeter, and titrimetry. The optimum results of the test show that the use of 14 volts of electricity and contact time for 120 minutes can reduce iron levels from 1.41 mg / l to 0.98 mg / l, and sulfate levels from 301.97 mg / l to 235.84 mg. / l, levels of organic substances from 3.05 mg / l to 2.25 mg / l and salinity levels from 16.25 ppt to 10.07 ppt.
RANCANG BANGUN ALAT TIPE SPRAY DRYER UNTUK PROSES PENGERINGAN SUSU BUBUK BERBASIS JAGUNG MANIS (Zea mays saccharata) Putri, Astri Oktaviana; Mentari, Inez Artemisia; Julyantiya, Robby Try; Yuliati, Selastia; Dewi, Erwana
KINETIKA Vol. 12 No. 3 (2021): KINETIKA 01112021
Publisher : Politeknik Negeri Sriwijaya

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Abstract

Drying is one of techniques used in food preservation. Spray Dryer is a type of dryer that can change the feed from a fluid state into granules and then convert again into particles which are dried continuously in hot drying media. Spray dryer uses liquid atomization to form droplets, then the droplets formed are dried using dry air with high temperature and pressure. This 31emperat aims to produce high quality corn porridge milk. The drying process is carried out by a batch process where the material is put into a spray dryer and the process is allowed for a certain period of time. The heat transfer process that occurs in this tool is the main variable to determine the efficiency and performance of the tool produced. The drying process of milk powder was carried out at a temperature of 150° C and 160°C in 75 minutes. Based on the analysis, the calculation of heat transfer rate, drying rate, and thermal efficiency obtained a powdered milk product of 0.8 grams with a convection heat transfer rate of 1.6924 kJ, a conduction heat transfer rate of 1.299 kJ, a drying rate of 31.594 kg / hour. And thermal efficiency of 35%.
Preparation of Bioethanol from Pineapple Peel Waste for Blending Pertalite into Alternative Fuel (Gasohol) Ihtifazhuddin, Farhan; Yerizam, Muhammad; Yuliati, Selastia
Jurnal Sumberdaya Alam dan Lingkungan Vol 11, No 2 (2024)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jsal.2024.011.02.1

Abstract

This study aims to obtain bioethanol according to the Indonesian National Standard (SNI) 7390:2012, obtain Gasohol according to the RON (Research Octane Number) standard in Pertalite, and produce alternative fuels that are more environmentally friendly. The bioethanol production process includes hydrolysis, fermentation, distillation, and adsorption, with Saccharomyces cerevisiae to ferment sugar in pineapple skin into ethanol with a content of 59.62% from a 5-day fermentation process with 4% Saccharomyces cerevisiae, 0.5% urea, 0.5% NPK. Bioethanol is then mixed with Pertalite in the composition of E5 (5 ml of bioethanol mixed with 95 ml of Pertalite) to E25 (25 ml of bioethanol mixed with 75 ml of Pertalite), lowering the flash point of the mixture from 29.8°C (E5) to 28.0°C (E25), increasing the density from 0.7239 gr.(cm3)-1 (E5) to 0.7250 gr.(cm3)-1 (E25) and the viscosity from 0.41 cSt (E5) to 0.49 cSt (E25). Still, the octane number (RON) tends to be stable at 91.4-95.6. As a result, the bioethanol content is close to SNI 99.5%, the bioethanol-Pertalite mixture improves several parameters but lowers the flash point, and the E25 mixture meets the RON standard of 95.6 for Pertalite.
KINERJA ALAT TIPE TRAY DRYER DENGAN MEMANFAATKAN SISTEM SOLAR CELL UNTUK PENGERINGAN BIJI KAKAO Kurniawan, Yoga Kurniawan; Yuliati, Selastia; Purnamasari, Indah
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol. 8 No. 1 (2024): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51544/kimia.v8i1.5188

Abstract

Pengeringan biji kakao yang dilakukan masyarakat saat ini masih secara manual (konvensional), yaitu dengan memanfaatkan energi cahaya matahari (dijemur), sehingga memakan waktu yang cukup lama. Tujuan penelitian ini adalah mempercepat proses pengeringan pada biji kakao dengan menggunakan alat pengering tipe tray dryer. Pengering tipe tray dryer yang dirancang memanfaatkan tenaga dari solar cell sebagai media pengeringan. Pada penelitian ini, alat tray dryer dirancang memiliki kapasitas 1 kg dengan 4 tray yang berbahan aluminium, alat ini juga dilengkapi dengan solar cell berkapasitas 50 watt-peak. Parameter yang diukur pada penelitian ini di antaranya, massa biji kakao sebelum pengeringan, massa biji kakao sesudah pengeringan, temperatur masuk biji kakao, temperatur keluar biji kakao, temperatur masuk udara, temperatur keluar udara, laju udara masuk, laju udara keluar, perpindahan panas konveksi, konduksi, radiasi, humidity, dan relatif humidity dengan variasi temperatur pengeringan 60℃ dan 70℃, serta variasi waktu pengeringan 15 menit sampai 180 menit. Menentukan efisiensi alat tray dryer dari perpindahan panas secara konduksi, konveksi, dan radiasi. Hasil penelitian menunjukkan bahwa kinerja dari alat tray dryer cukup optimal untuk mengeringkan biji kakao karena mampu menguapkan kadar air pada biji kakao dengan nilai akhir 11,88% pada temperatur 70℃ selama 180 menit. Berdasarkan hasil penelitian yang telah dilakukan bahwasannya kualitas biji kakao sudah hampir mendekati ketentuan SNI-01-2323-2008 yaitu 7,5%. Hasil penelitian juga menunjukkan efisiensi thermal alat tertinggi dengan nilai 73,35% pada temperatur 70℃.
Pembuatan Bioetanol dari Limbah Kulit Nanas untuk Pencampuran Pertalite menjadi Bahan Bakar Alternatif (Gasohol) Ihtifazhuddin, Farhan; Yerizam, Muhammad; Yuliati, Selastia
Jurnal Energi Baru dan Terbarukan Vol 5, No 3 (2024): Oktober 2024
Publisher : Program Studi Magister Energi, Sekolah Pascasarjana, Universitas Diponegoro, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jebt.2024.24136

Abstract

Penelitian ini bertujuan memanfaatkan limbah kulit nanas untuk pembuatan bioetanol dan campurannya dengan bahan bakar Pertalite, menghasilkan bahan bakar alternatif yang lebih ramah lingkungan. Proses produksi bioetanol meliputi hidrolisis, fermentasi, distilasi, dan adsorpsi, dengan ragi Saccharomyces cerevisiae untuk memfermentasi gula dalam kulit nanas menjadi etanol dengan kadar 59,62% dari proses fermentasi 5 hari dengan 4% ragi, 0,5% urea, 0,5% NPK. Bioetanol kemudian dicampurkan dengan Pertalite dalam komposisi E5 hingga E25, menurunkan titik nyala campuran dari 29,8°C (E5) ke 28,0°C (E25), meningkatkan densitas dari 0,7239 gr/cm3 (E5) ke 0,7250 gr/cm3 (E25) dan viskositas dari 0,41 cSt (E5) ke 0,49 cSt (E25), namun angka oktan (RON) cenderung stabil pada 91,4- 95,6. Tujuan penelitian adalah menghasilkan bioetanol sesuai SNI 7390:2012, mendapatkan parameter optimal pencampuran bioetanol-Pertalite, dan mencapai kualitas Gasohol standar RON Pertalite. Hasilnya, kadar bioetanol kurang mendekati SNI 99,5%, campuran bioetanol-Pertalite meningkatkan beberapa parameter namun menurunkan titik nyala, dan campuran E25 memenuhi standar RON 95,6 untuk Pertalite.
Pretreatment Delignifikasi Limbah Kulit Durian Sebagai Bahan Baku Pembuatan Bioetanol Putra, Rizkika; Yerizam, Muhammad; Yuliati, Selastia
Jurnal Daur Lingkungan Vol 7, No 2 (2024): Agustus
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/daurling.v7i2.306

Abstract

ABSTRAKKulit durian (60-75% bagian durian) mengandung selulosa 55,3%, lignin 19,3% dan abu 6,1%. Kandungan selulosa yang cukup tinggi dalam kulit durian merupakan potensi bioetanol. Tetapi, kandungan lignin dalam kulit durian mengganggu proses pembuatan bioetanol. Lignin bersifat cukup resisten terhadap degradasi kimia dan biologi, sehingga menghambat proses fermentasi. Diperlukan pretreatment proses delignifikasi untuk membantu proses fermentasi. Proses delignifikasi membutuhkan senyawa basa kuat dalam proses pemisahan lignin dari selulosa. Delignifikasi dalam penelitian ini dilakukan dengan aplikasi NaOH 2%, 3%, 4%, 5% dan 6% dan waktu 60, 90 dan 120 menit. Pretreatment delignifikasi diharapkan meningkatkan kadar selulosa dan menurunkan kadar lignin. Kondisi terbaik pretreatment delignifikasi yaitu larutan pemasak NaOH 6%w/v dengan waktu 120 menit yang menghasilkan 83,05%w/w selulosa dan 8,03%w/w  lignin. Larutan pemasak NaOH dengan konsentrasi yang tinggi dan waktu delignifikasi yang semakin lama menurunkan kadar lignin dan meningkatkan selulosa. Kata kunci : Delignifikasi, Lignin, Limbah Kulit Durian, NaOH, SelulosaABSTRACTDurian peel (60-75%) contains cellulose 55.3%, lignin 19.3%, and ash 6.1%. Due to its high cellulose content, durian peel can be utilized and processed into bioethanol. However, in the production of bioethanol using durian peel waste as a raw material, lignin interferes the bioethanol production process: lignin. Lignin chemically and biologically resistant to degradation restricting the fermentation process. Therefore, a pretreatment delignification process is required before fermentation. A strong alkaline compound is needed in the delignification process to separate lignin from cellulose. This study uses NaOH as a strong base in the delignification process. The variations used in this study are the concentration of NaOH (2%, 3%, 4%, 5%, and 6%) and time (60, 90, and 120 minutes). Delignification pretreatment affects the cellulose and lignin content produced, with the best delignification pretreatment condition being a 6%w/v NaOH cooking solution for 120 minutes, resulting in a cellulose content of 83.05%w/w and a lignin content of 8.03%w/w. Increase concentration of NaOH as the cooking solution and longer time of the delignification time, increase cellulose obtained and decrease lignin content Keywords :    Cellulose, Delignification, Lignin, NaOH, Waste peel of Durian
Edukasi Pembuatan Pupuk Organik Cair (POC) Dari Limbah Sabut Kelapa di Desa Tanjung Pinang II Ramayanti, Cindi; Oktaviani, Erika Dwi; Puspa, Dilia; Mujiyanti, Apri; Wardhana, Agum Try; Yuliati, Selastia; Maulana, Ferdika Nanda
IKRA-ITH ABDIMAS Vol. 9 No. 2 (2025): Jurnal IKRAITH-ABDIMAS Vol 9 No 2 Juli 2025
Publisher : Universitas Persada Indonesia YAI

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Abstract

Desa Tanjung Pinang II merupakan desa yang terletak di kecamatan Tanjung batu, kabupaten Ogan ilir, Sumatera Selatan. Pada desa ini memiliki sebuah tempat wisata yaitu teluk perepat yang menjadi fokus pembangunan di desa Tanjung Pinang II, wisata teluk perepat ini merupakan wisata air berupa danau namun masih dalam tahap pengembangan sehingga banyak hal yang perlu dilakukan oleh warga dan pemerintah desa untuk membuat wisata ini semakin maju terutama dalam hal penghijauan, maka dari itu pada pengabdian ini bertujuan membantu mengembangkan keindahan dari wisata teluk perepat. Salah satu upaya dalam membantu program penghijauan adalah memberikan edukasi pada masyarakat mengenai pembuatan pupuk organik cair (POC) guna menunjang penghijauan tersebut. Bahan utama yang digunakan pada pembuatan POC adalah limbah sabut kelapa yang bersymber dari masyarakat desa. Metode yang digunakan dalam program pengabdian ini yaitu melakukan edukasi dan praktik langsung pembuatan POC bersama masyarakat dimana hasil nya nanti bisa digunakan untuk tanaman yang di tanam di Teluk Perepat. Dan setelah digunakan ke tanaman, pembuatan POC ini bisa dikatakan berhasil karena tanaman tumbuh dengan subur dan hijau setelah digunakan pupuk organik cair ini. harapan lainnya juga semoga dengan penulis melakukan edukasi praktek pembuatan langsung ini masyarakat bisa membuat dan mempraktekan nya sendiri nanti kedepannya.
Co-Authors ., Fadarina Abu Hasan Alnafrah, Fenty Alpitansyah, Rachmad Bayu Anerasari Meidinariasty Ardiani, Salsha Arif Rachman, Muhamad Arizal Aswan Azizah, Roro Rizqi Ramadhani Erwana Dewi Febriyanti Haliman, Annisa Cendani HC, Fadarina Ihtifazhuddin, Farhan Indah Purnamasari Ismareni, Pepi Julyantiya, Robby Try Kalsum, Leila Kaslum, Leila Kurniawan, Yoga Kurniawan Maulana, Ferdika Nanda Mentari, Inez Artemisia Muhammad Yerizam Mujiyanti, Apri Ningrum, Galuh Martiyah Oktaviani, Erika Dwi Pratama, M.Bagas Puspa, Dilia Putra, Rizkika Putri, Astri Oktaviana Ramayanti, Cindi Robert Junaidi Syakdani, Adi Tahdid Utami, Winda Andea Wardhana, Agum Try Wardhana, Galindra Pramudya Wasiran, Yulianto Yuliani, Aliyah Yuniar