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All Journal TEKNIK JURNAL KIMIA SAINS DAN APLIKASI Publikasi Pendidikan JURNAL TEKNOLOGI LINGKUNGAN CHEMICA Jurnal Teknik Kimia Jurnal Teknologi Pangan Jurnal Teknik Kimia Eksergi: Chemical Engineering Journal Majalah Ilmiah MOMENTUM E-Dimas: Jurnal Pengabdian kepada Masyarakat Indonesia Chimica Acta Journal Of Chemical Process Engineering (JCPE) Turbo : Jurnal Program Studi Teknik Mesin JAST : Jurnal Aplikasi Sains dan Teknologi Jurnal Teknik Kimia Jurnal Metalurgi dan Material Indonesia RADIAL: JuRnal PerADaban SaIns RekAyasan dan TeknoLogi Jurnal Inovasi Teknik Kimia Journal of Community Empowerment for Health Jurnal Abdi Insani JURNAL FLYWHEEL Nusantara Science and Technology Proceedings International Journal Of Science, Technology & Management (IJSTM) International Journal of Eco-Innovation in Science and Engineering (IJEISE) AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Jurnal Pengbdian Teknik Mesin Biomedical and Mechanical Engineering Journal Envirotek : Jurnal Ilmiah Teknik Lingkungan Innovative: Journal Of Social Science Research Jurnal Teknik Kimia dan Lingkungan Maddana: Jurnal Pengabdian Kepada Masyarakat Jurnal Akademik Pengabdian Masyarakat Journal Of Chemical Process Engineering Journal Serambi Engineering (JSE) JURNAL REKAYASA KIMIA & LINGKUNGAN Dharmakayana: Journal of scientists, engineers, educators and scientific activists related to society development RADIAL: Jurnal Peradaban Sains, Rekayasa dan Teknologi
Luluk Edahwati
Department Of Mechanical Engineering, Universitas Pembangunan Nasional Veteran Jawa Timur, Surabaya 60294, Indonesia
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Public Health Social Sciences Transportation Other

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Perancangan Mesin Pengupas dan Pemarut Batang Ubi Kayu: Konsep Rancangan Mesin Novel Karaman; Ndaru Adyono; Tria Puspa Sari; Luluk Edahwati; Wahyu Dwi Lestari
Biomedical and Mechanical Engineering Journal (BIOMEJ) Vol. 1 No. 1 (2021): BIOMEJ
Publisher : Mechanical Engineering Department at Universitas Pembangunan Nasional "Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (400.779 KB)

Abstract

Indonesia negara penghasil ubi kayu terbesar ke lima di dunia dimana produksi ubi kayu Nasional per tahun mencapai 23 juta ton. Disisi lain terdapat limbah organik berupa batang ubi kayu dengan potensi pemanfaatan kandungan alpha-selulosa batang yang besar. Alpha-selulosa merupakan bahan dari biomass yang sangat dibutuhkan dalam bidang industri maupun sumber energi yang terbarukan. Alpha-sellulose yang berkualitas tinggi dihasilkan dari serat batang ubi kayu yang telah dipisahkan bagian kulit luarnya. Penelitian dalam perancangan mesin yang mampu memproses pengupasan dan pemarutan batang ubi kayu secara bersamaan sangatlah berpotensi meningkatkan produktivitas pembuatan bahan baku Alpha-selulosa untuk kebutuhan industri. Perancangan purwarupa mesin pengupas dan pemarut batang ubi kayu menggunakan pendekatan elemen mesin diharapkan menghasilkan rancangan mesin yang memiliki spesifikasi motor penggerak utama 3 phase kapasitas 0,5 HP dengan putaran 1400 rpm yang terdiri dari 2 transmisi berupa pulley dan transmisi gear box ratio 60.
Kinetika reaksi perolehan fosfat dari pengolahan limbah garam (bittern) menjadi struvite dengan reaktor vertikal Anisah D. Ramadhani; Agung F. Kulianto; Luluk Edahwati
Jurnal Teknik Kimia Vol 27 No 1 (2021): Jurnal Teknik Kimia
Publisher : Chemical Engineering Department, Faculty of Engineering, Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jtk.v27i1.11

Abstract

Bittern merupakan hasil dari penguapan atau endapan air laut dalam pembuatan garam. Bittern ini dapat dimanfaatkan untuk diolah menjadi struvite karena pada bittern terdapat kandungan Magnesium. Pada penelitian ini, peneliti akan mengkaji mengenai kinetika reaksi perolehan fosfat dari pembentukan struvite yang berasal dari limbah garam (bittern). Pembentukan struvite dilakukan dengan mencampurkan tiga senyawa yaitu Magnesium, Amonium, dan Phospat (MAP) dengan perbandingan 1:1:1. Alat yang digunakan adalah reaktor vertikal. Larutan MAP dimasukkan ke dalam reaktor dengan variasi suhu dan laju alir umpan. Variasi suhu yang digunakan adalah 25; 30; 35; 40; dan 450C, sedangkan variasi laju alir umpan yang digunakan adalah 5; 6,25; 8,33; 12,5; dan 25 ml/menit. Kedua variabel dijalankan dengan penambahan KOH. Semua variabel dijalankan sampai mencapai pH 9, dimana pH 9 adalah pH optimum pembentukan struvite, dan setelah mencapai pH 9, proses dihentikan. Endapan yang didapat lalu difiltrasi dan dikeringkan, lalu dilakukan Analisa endapan dengan metode XRF dan XRD. Dari hasil penelitian yang telah dilakukan, hasil konversi terbaik perolehan senyawa fosfat terdapat pada suhu 250C dan laju alir 5 ml/menit, yaitu sebesar 18,8%. Penelitian ini mengikuti reaksi orde-1 dengan nilai R2 yang mendekati 1, yaitu sebesar 0,9524 dengan tetapan laju reaksi 1,26.10-22.e(14125/T), dan energi aktivasi sebesar 117435,25 Joule.
Magnesium Recovery of Struvite Formation Based on Waste Salts (Bittern) with a Bulkhead Reactor Luluk edahwati; Sutiyono; Nikmatuz Zahra; Herdiana Septiani
International Journal of Eco-Innovation in Science and Engineering Vol. 1 No. 01 (2020): IJEISE
Publisher : Engineering Faculty, University of Pembangunan Nasional Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/ijeise.v1i01.1

Abstract

Waste salt or bittern is the residual liquid from the salt formation which cannot be precipitated again but can be obtained from the washing water remaining in the purification process. Bittern has high economic value of mineral salts such as MgCl2, MgSO4, KCl, and Br2. The element Mg in bittern can be used as a mineral forming struvite because magnesium is one of the components needed in the formation of struvite. Crystallization of the formation of struvite minerals occurs in equimolecular concentrations of Mg 2+, NH4 + and PO43 - in an alkaline state. The column reactor is equipped with a bulkhead which functions as a stirrer inside the reactor and is assisted by incoming air. Struvite solution (MAP) reacted can be formed from phosphoric acid, ammonium hydroxide, and bittern or salt waste as a source of magnesium with a molar ratio of 2: 1: 1. The pH variations run in the range of 7 to 11 and the reactor inlet air velocity between 0.25-1.25 L/min in a closed column reactor that is operated continuously. The resulting dry sludge was analyzed by XRD method for mineral characterization, SEM to determine the morphology of the crystals and XRF to determine the composition of struvite mineral.
Tofu Factory Liquid Waste for Making Struvite with Canted Vertical Reactors Sutiyono; Luluk edahwati; Kartika Pratiwi; Achmad Fanani
International Journal of Eco-Innovation in Science and Engineering Vol. 1 No. 01 (2020): IJEISE
Publisher : Engineering Faculty, University of Pembangunan Nasional Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/ijeise.v1i01.9

Abstract

Struvite is a white crystal, chemically known as magnesium ammonium phosphate hexahydrate (MgNH4PO4.6H2O). Tofu factory liquid waste is waste that can be reused because of its content. Tofu factory liquid waste can potentially pollute the environment. This research aimsto analyze the manufacture of struvite by utilizing the phosphate content contained in the liquid waste of tofu factories using vertical canted column reactors which can reduce environmental pollution due to liquid waste of tofu factories. This study uses a vertical canted column reactors by mixing anequimolar 1: 1: 1 MgCl2: NH4OH: H3PO4 solution. Struvite crystallization process operates at a temperature variation of 30°C,35°C,40°C,45.50°Cand a pH of 8, 9,10,11,12 by maintaining the air rate of 0.5 liters minute-1 and a MAP (Magnesium Ammonium Phosphate)flow of 56 ml minutes-1 as a whole. The crystallization process runs until a steady state conditionis reached. Then, the struvite crystals obtained were filtered and dried at room temperature for 24 hours. After that struvite crystals were analyzed using XRF, XRD, and SEM. The results of the study obtained the best phosphate conversion of 24.935% at 30°C and pH 8.
Recovery of Phosphate and Ammonium from Dairy Cow Urine by Struvite Crystallization with Vertical Reactor Luluk Edahwati; Sutiyono; Rizqi Rendri Anggriawan
International Journal of Eco-Innovation in Science and Engineering Vol. 1 No. 02 (2020): IJEISE
Publisher : Engineering Faculty, University of Pembangunan Nasional Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/ijeise.v1i02.23

Abstract

Excess phosphate (PO43-) and ammonium (NH4+) in wastewater can cause environmental damages, such as pollutants and eutrophication in water. Dairy cow urine is a dangerous liquid waste that contains high amounts of phosphate and ammonium. The removal of PO4 and NH4 components can be done by crystallizing them into struvite fertilizers. Struvite (MgNH4PO4.6H2O) is a mineral formed from magnesium, ammonium, and phosphate with the equimolar ratio. The crystallization process of struvite is carried out using a vertical reactor. MAP solution (magnesium ammonium phosphate) is prepared by reacting MgCl2, H3PO4, and dairy cow urine with MAP molar ratio of 1 : 1 : 1 and KOH 1N. The study run in pH 8; 8.5; 9; 9.5; 10 and temperature variations of 25, 30, 35, 40, 45˚C in vertical reactor continuously. The struvite precipitate was filtered and dried, it is analyzed by XRF to determine the struvite composition and SEM to determine the morphology of the struvite. The results showed that the best percentage of phosphate and ammonium was at 45˚C and pH 9.5, it was 33.2% and 27.9%.
Pengolahan Bittern Sebagai Pembentuk Pupuk Struvite Menggunakan Reaktor Sekat Secara Sinambung Herdiana Septiani; Nikmatuz Zahra; Sutiyono; Luluk Edahwati
Jurnal Metalurgi dan Material Indonesia Vol. 3 No. 1 (2020): April
Publisher : Badan Kerja Sama Pendidikan Metalurgi dan Material (BKPMM)

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Waste salt or bittern is the residual liquid from the salt formation which can not be precipitated again or also can be obtained from the washing water remaining in the purification process. Bittern contains salt such as MgCl2, MgSO4, KCl, and Br2. From the various minerals contained in the bittern, one of the minerals used as the basic ingredient of making struvite fertilizer, named Magnesium. Bittern has not been utilized significantly, this has become one of the goals and benefits of our research, which is making struvite fertilizer using salt waste, which will add up to it’s economic value. Struvite mineral can also be applied in agriculture such as raw material fertilizer, because struvite fertilizer is very beneficial for the growth and development of the plant. The most beneficial characteristic of struvite fertilizer is the slow release of nutrients so it will lessen fertilizer application on plants. Struvite has a very small solubility in water that is 0.02 gr / 100 ml at 0 ºC. Struvite solution (MAP) can be formed from phosphoric acid, ammonium hydroxide, and bittern or salt waste as a source of magnesium with a molar ratio of 2: 1: 1. PH variations carried out include 7 to 11 and the reactor intake air velocity in the range of 0.25-1.25 l / min in a fixed column operated reactor. The resulting dry sludge was analyzed by XRD method for mineral characterization and SEM to determine the composition and morphology of the crystals..
Reduction of Lignin from Coffee Husk using Organosolve Method Luluk Edahwati; Dyah Suci Perwitasari; Dyah Siswanti
Eksergi Vol 11, No 2
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v11i2.364

Abstract

Coffeehas a significant role for the plantation sector in Indonesia. During processing of coffee, the husk is alse gonerated. Coffeefruit husk waste is usally used as an animal feed ingredient or as organic fertilizer. Coffee shell husk contains lignin and cellulose in 8.67% at 41.26%, respectively.This cellulose is rather high, that could be potential for bioethanol production. However the quality of bioethanol will increase if the lignin content in coffee leather eliminated or reduced. Organosolve method is one of the lignin separation process using organic chemicals that are environmentally friendly eg ethanol and methanol. In this lignin removal process variable is run 2 hours of cooking time, the concentration of ethanol (v / v) 10%, 20%, 30%, 40%, and 50%, while the addition of citric acid 1:12, 1:16 and 1: 18. The best result of the removal of lignin from cocoahusk occurred in 40%(v/v)ethanol  with the addition of citric acid and 1:16 for 2 hours cooking time obtained lignin content (in deposition) of 0.31% and 6.14 % lignin in the filtrate.
Reaction Kinetics of Ammonium Removal from Cow Urine by Struvite Formation Using a Baffle Column Reactor Rizqi Rendri Anggriawan; Fauziah Hilda Alvira; Luluk Edahwati
CHEMICA: Jurnal Teknik Kimia Vol 7, No 2 (2020): Desember 2020
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/chemica.v7i2.18209

Abstract

Reaction kinetics is the study of reaction rates and reaction mechanisms, which refers to determining the order and reaction rate constants of a given material. This study will examine the kinetics of the reaction of ammonium removal from cow urine by struvite formation. Cow urine contains NH4 which is high enough so that it can be used as material for the manufacture of struvite. Struvite (MgNH4PO4.6H2O) is a white crystalline material consisting of magnesium, ammonium, and phosphate in equimolar. The experiment was conducted with a temperature setting of 25, 35, 45, and 65 ËšC. The flow rates used were 8.8, 11, 14.67, 22, and 44 mL/min. The process of making struvite was carried out by crystallization at pH 9, molar ratio of 3:1:1, also air rate of 0.4 L/min. The study carried out following the first order with the best conversion was 0.7797 at 8.8 ml/min and 65 ËšC. The activation energy is 3123.82 J/mol and the collision frequency is 0.0379. The equation of reaction rate k = 0.0379 e-375,73/T (K-1).
Analysis of effect Magnesium Ammonium Phospate (MAP) Concentration on Struvite Morphology in A Vertical Reactor Luluk Edahwati; Sutiyono; Atika Andini; Wahyu Dwi Lestari; Tria Puspa Sari; Ndaru Adyono; Novel Karaman
Biomedical and Mechanical Engineering Journal (BIOMEJ) Vol. 1 No. 1 (2021): BIOMEJ
Publisher : Mechanical Engineering Department at Universitas Pembangunan Nasional "Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (403.606 KB)

Abstract

Struvite was a white crystal known as Magnesium Ammonium Phosphate Hexahydrate (MgNH4PO4.6H2O). In industry, struvite was found in the pipes crust which the hot fluid through passes. Struvite is often used as fertilizer because it contains phosphate content. The one of benefits of struvite crystals is slow release fertilizer, so it can be more durable, which is good for the growth of the plants. The Precipitation technology is currently one of the most widely applied technologies in struvite formation. The process of forming struvite is carried out by using a vertical reactor. The process started by mixing the equimolar solutions of MgCl2, NH4OH, and H3PO4 with a concentration ratio of 1: 1: 1 and 1: 1: 2. The process was carried out with the condition at the 30°C while the air inlet rate was 1.25 liters/min. The pH of the solution is pH 9 and controlled using NaOH solution. The process was carried out in the steady state condition. Then the solution was filtered and solid was dried at room temperature for 48 hours. From this study, the concentration ratio of 1:1:2 was obtained the best composition of struvite compared to the others ratio. The solid was analyzed by using the SEM-EDX instrument. The morphology of struvite was formed an irregular pyramid-like crystal or commonly referred to as an authorhombic shape.
Control of Struvite (MgNH4 PO4 .6H2O) Scale Deposit in an Industrial Process Luluk Edahwati; Sutiyono; Radissa Dzaky Issafira; Ndaru Adyono; Wiliandi Saputro; Wahyu Dwi Lestari; Ahmad Khairul Faizin; Tria Puspa Sari
Nusantara Science and Technology Proceedings 2nd International Conference Eco-Innovation in Science, Engineering, and Technology
Publisher : Future Science

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Struvite or Magnesium Ammonium Phosphate Hexahydrate (MgNH4 PO4.6H2O) is one of the precipitates generally formed in the piping system. The formation of struvite in the piping system is one of the serious problems that can cause blockages, reduced flow volume, and pipe diameter to increase maintenance and production costs. This formation of struvite scale in the industrial instrument is detrimental; however, struvite can be used as raw material for slow-release fertilizers. This study will observe the effect of pH in the range of 8, 8.5, 9, 9.5, and 10 on the formation of struvite compositions, consisting of Mg, NH4, PO4, Ca, and K in the surrounding temperature of 35oC. The results of this study will be observed using visual MINTEQ software. The result shows that the most suitable pH for struvite formation is 9.5.
Co-Authors A. Khanifah Achmad Fanani Adeniah Setiabudi Adiman, Thareq Muhammad Fathan Agung F. Kulianto Ahmad Khairul Faizin Ahmad Khairun Faizin Alya Keisha Intan Chayrunisya Andini, Atika Anggriawan, Rizqi Rendri Aninda Ikaputri Anisah D. Ramadhani Anisah Nurul Izzah Aprilianty, Syasmitha Lucky Ardiza, R.Muhammad Rizky Atika Andini Ayu Fakhira Yuliananda Bayu Sastra Dewangga Caecilia Pujiastuti Chaterine Oktavia Anggaraeni Devi Diyah Ayu Prameswari Dewangga, Bayu S. Dewi Maya Maharani Dian Nuraini Dita Prariesta DWI LESTARI, WAHYU Dyah Siswanti Dyah Suci Perwitasari Edahwati, Wahyu Dwi Lestari Erwan Adi Saputro Faizin, Ahmad Khairul Falah, Ra Niyatul Fatkhurrohman Fatkhurrohman Fauziah Hilda Alvira Fauziah Hilda Alvira Fauziah, Maria Rizky Ferdi Kurniawan Feriyanto, Ahmad Fransisca Adya Zahiroh Gobel, Fendy Faizal Harya, Gyska Indah Herdiana Septiani Herdiana Septiani Ika Nawang Puspitawati Ikaputri, Aninda Indah N. F. Indah Nur Fauziyah Issafira, Radissa Dzaky Jayan Sentanuhady Joanne Rizma Pramitha Kalimatus S Kartika Pratiwi Kurniawan, Ferdi L.Urip Widodo, Yohandrik Novel Karaman Lusy Larasati A Lusy Larasati A M Danny Pratama Lamura Maria Rizky Fauziah Maria Vindri Vincensia Saru Moch Miftakhurrohman Mochammad Alief Setyanugraha Moh Nur Fuadzi Mohammad Rafli Alif Wahyudi Mr. Sutiyono Muhammad Ikhsan Muhammad Taqiyyuddin Munandar, Siswanto Musyaroh, Musyaroh Mutiya Zevi Nana Dyah Siswati, Anwar Zain and Mohammad Nandini, Atika Nazila Alfi Rahmah Ndaru Adyono Ndaru Adyono Ndaru Adyono Ndaru Adyono, Ndaru Nikmatuz Zahra Nikmatuz Zahra Novel Karaman Novel Karaman Nur Fuadzi, Moh Nur Ikhtiarini Prayoga, Ferdiyan Tri Puspa Sari, Tria Qanitah Nibras Firmaniya Ra Niyatul Falah Radissa Dzaky Issafira Radissa Dzaky Issafira Radissa Dzaky Issafira Radissa Dzaky Issafira Radissa Dzaky Issafira Radissa Dzaky Issafira Radissa Dzaky Issafira Rahmah, Nazila Alfi Rahmaniar Naulita Hutagalung Reva Edra Nugraha Reyhan Firmansyah Rifaldo Pido Rizaldi, Ryan Rizqa Ruviana Rizqa Ruviana Rizqi Rendri Anggriawan Rizqi Rendri Anggriawan Rizqi Rendri Anggriawan S D Nurherdiana S Sutiyono S, Sutiyono Sari, Tria Puspa Saru, Maria Vindri Vincensia Setyanugraha, Moch. Alief Shinta Soraya Santi Siti Robiatuz Zahrotun Nukhuf Soemargono Soemargono Sri Muljani Sri Redjeki Srie Muljani SRIE MULJANI Srie Muljani Srie Muljani Suhaili Sulaiman, Yusri Risyad Suprihatin Susilowati Susilowati MT Susilowati Susilowati Sutiyono Sutiyono . Sutiyono Sutiyono sutiyono sutiyono Titi Susilowati Tria Puspa Sari Tutuk Harsini Wahyu Dwi Lestari Wahyu Dwi Lestari Wahyu Dwi Lestari Edahwati Wahyudi, Mohammad Rafli Alif Widya Wijayanti Wiliandi Saputro Wiliandi Saputro Wiliandi Saputro Wiliandi Saputro Wiliandi Saputro Wiliandi Saputro Wiliandi Saputro Willie Prasidha Zevi, Mutiya