Article Per Year (5 Year)
p-Index From 2021 - 2026
5.066
P-Index
This Author published in this journals
All Journal TEKNIK JURNAL KIMIA SAINS DAN APLIKASI JURNAL TEKNOLOGI LINGKUNGAN CHEMICA Jurnal Teknik Kimia Jurnal Teknologi Pangan Jurnal Teknik Kimia Eksergi: Chemical Engineering Journal Majalah Ilmiah MOMENTUM Journal Of Chemical Process Engineering (JCPE) Turbo : Jurnal Program Studi Teknik Mesin Jurnal Teknik Kimia Jurnal Metalurgi dan Material Indonesia RADIAL: JuRnal PerADaban SaIns RekAyasan dan TeknoLogi Jurnal Abdi Insani JURNAL FLYWHEEL International Journal Of Science, Technology & Management (IJSTM) International Journal of Eco-Innovation in Science and Engineering (IJEISE) Jurnal Pengbdian Teknik Mesin Biomedical and Mechanical Engineering Journal Innovative: Journal Of Social Science Research Maddana: Jurnal Pengabdian Kepada Masyarakat Journal Of Chemical Process Engineering JURNAL REKAYASA KIMIA & LINGKUNGAN RADIAL: Jurnal Peradaban Sains, Rekayasa dan Teknologi
Luluk Edahwati
UPN Veteran Jawa Timur
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 Public Health Social Sciences Transportation Other

Published : 47 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 47 Documents
Search

 1   2   3   4   5 
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.
Sintesis dan Karakteristik Struvite Dengan Proses Bubble Maria Vindri Vincensia Saru; Mutiya Zevi; Luluk Edahwati
Journal of Chemical Process Engineering Vol 7, No 1 (2022)
Publisher : Universitas Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (380.601 KB) | DOI: 10.33536/jcpe.v7i1.1151

Abstract

Hasil reaksi antara magnesium, amonium, fosfat yang berbentuk kristal berwarna putih disebut struvite (MgNH4PO4.6H2O). Tujuan penelitian yaitu untuk mengetahui karakteristik struvite dengan proses bubble, dan mengetahui rasio molar, serta pH yang terbaik untuk pembentukan struvite. Variabel peubah rasio molar menggunakan variasi rasio MAP 1:1:1, 1,5:1:1, 2:1:1, 2,5:1:1, dan 3:1:1. Pembentukan struvite dilakukan menggunakan proses bubble yang berfungsi sebagai pengaduk, dengan laju aliran udara sebesar 1 L/Menit.  Pembentukan mineral struvite dipengaruhi oleh pH yang akan berpengaruh pada kelarutan, sehingga digunakan variabel peubah sebesar 7, 8, 9, 10, dan 11 untuk menentukan kondisi terbaik pembentukan struvite. Hasil analisa penelitian diperoleh kondisi terbaik pembentukan struvite untuk kandungan magnesium dalam kondisi pH 9 menggunakan rasio molar 1:1:1 diperoleh sebesar 10%. Kandungan unsur fosfat pembentukan struvite diperoleh kondisi terbaik dalam pH 9 dan rasio molar 3:1:1 sebesar 69,5%. Hal tersebut terjadi karena pada pH 7-8 pembentukan struvite belum optimal, dan pada pH 10 mulai menurun karena meningkatnya impurities. Struvite yang terbentuk memiliki karateristik berbentuk batang dan ujung runcing, permukaannya rata, dengan kandungan unsur Mg sebesar 10% dan kandungan fosfat sebesar 69,5%. The product of the reaction of  magnesium, ammonium, phosphate in the form of white crystals is called struvite (MgNH4PO4.6H2O). The purpose of this study was to use the bubble method to characterize struvite and determine the optimal molar ratio and pH for struvite formation.The molar ratio variables used variations of the Magnesium Ammonium Phosphate (MAP) ratio of  1:1:1, 1.5:1:1, 2:1:1, 2.5:1:1, and 3:1:1.  Structural testing of struvite is carried out with a bubble process that works as a stirrer with an air flow rate of 1 L/minute. Structural minerals are influenced by pH, which will affect their solubility, so that the variables of 7, 8, 9, 10, and 11 are used to determine the best conditions for struvite formation. The results of the research analysis showed that optimal conditions for struvite formation of magnesium content were achieved at pH 9 conditions using a 1: 1: 1 molar ratio of 10%. Phosphate content in struvite formation was best obtained  at pH 9 and a 3: 1: 1 molar ratio of  69.5%. This happens because at pH 7-8 the formation of struvite is not optimal, and at pH 10 it begins to decrease due to impurities. The struvite formed has the characteristics of being rod-shaped with pointed ends. The surface is flat with an elemental Mg content of 10% and a phosphate content of 69.5%. w:LsdException Locked="false" Priorit
Analysis of effect Magnesium Ammonium Phospate (MAP) Concentration on Struvite Morphology in A Vertical Reactor Edahwati, Luluk; Sutiyono; Andini, Atika; Dwi Lestari, Wahyu; Puspa Sari, Tria; Adyono, Ndaru; Karaman, Novel
BIOMEJ Vol. 1 No. 1 (2021): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/biomej.v1i1.22

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. Theprocess 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 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.
SEM Analysis of UHMWPE for Biomedical Application Dwi Lestari, Wahyu; Edahwati, Luluk; Puspa Sari, Tria; Adyono, Ndaru; Karaman, Novel
BIOMEJ Vol. 1 No. 1 (2021): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/biomej.v1i1.23

Abstract

The objective of this study is to investigate the wear mechanism of UHMWPE acetabular liner. There were three samples of acetabular liner with variations without crosslink, with crosslink doses of 50 kGy and 100 kGy which were subjected to a wear testing process. The wear test was carried out using a Tribometer wear testing machine with a total of 30,000 cycles and a load of 800N. Microstructure analysis was performed using scanning electron microscopy (SEM). The results show that the surface of the UHMWPE acetabular liner with the crosslink treatment is smoother than the untreated one. This shows that UHMWPE with crosslink treatment has a lower wear rate, where the greater the crosslink dose the lower the wear rate. The wear mechanism that occurs in this study is the third body abrasion which leads to adhesive wear.
Perancangan Mesin Pengupas dan Pemarus Batang Ubi Kayu: Konsep Rancangan Mesin Karaman, Novel; Adyono, Ndaru; Puspa Sari, Tria; Edahwati, Luluk; Edahwati, Wahyu Dwi Lestari
BIOMEJ Vol. 1 No. 1 (2021): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/biomej.v1i1.28

Abstract

Indonesia is the fifth largest cassava-producing country, where the national cassava production per year reaches 23 million tons. On the other hand, the organic waste in the form of cassava stems with the potential to use a large alpha-cellulose stem content. Alpha-cellulose is a much-needed biomass material in the field of industry and renewable energy sources. Highquality alpha-cellulose is produced from cassava stem fibers that have separated the outer shell. Research in the design of machines capable of processing stripping and sequencing cassava stems simultaneously has the potential to increase the productivity of making Alpha-cellulose raw materials for industrial needs. The prototype design peeling machine and a cassava rod pucker using the engine element approach is expected to produce an engine design that has the specification of a 0.5 HP 3-phase main drive motor with a 1400 rpm rotation consisting of 2 pulley transmissions and a gearbox ratio of 60.
Analysis of pH Regulation on the Ca/P Ratio of Green Mussel Shell Hydroxyapatite using the Sol-Gel Method Edahwati, Luluk; Sutiyono; Suprihatin; Titi Susilowati; Sri Muljani
BIOMEJ Vol. 3 No. 2 (2023): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/biomej.v3i2.83

Abstract

Kandungan kalsium karbonat dari cangkang kerang hijau dapat dimanfaatkan sebagai salah satu material. Hidroksiapatit merupakan mineral utama yang menyusun tulang dan gigi sehingga memiliki kemiripan dengan bagian mineral pada tulang. Penelitian dilakukan untuk Konsentrasi reagen asam fosfat yang digunakan dan pH reaksi pada perolehan rasio Ca/P dari Hidroksiapatit yang didapatkan melalui proses sintesis dengan menggunakan metode sol-gel. Proses presipitasi calsium carbonat dilakukan dengan menambahkan air sebanyak 50 ml kedalam larutan H3PO4 dengan konsentrasi 1M kemudian diaduk selama 3 jam menggunakan magnetic stirrer dengan kecepatan pengadukan sebesar 300 rpm, pH dijaga 8 – 12 ( variabel ) menggunakan bantuan NaOH. Selanjutnya larutan dilakukan penuaan (waktu aging) pada suhu kamar selama 20 jam sampai terbentuk gel. Gel yang telah terbentuk disaring menggunakan kertas saring watman. Selanjutnya gel dipanaskan dalam oven dengan suhu 105 selama 2 jam. Serbuk yang dihasilkan kemudian difurnace pada temperatur 600oC selama kurang lebih 6 jam supaya membentuk serbuk kering Hidroksiapatit. Rasio Ca/P terbaik sebesar 1,6708 dengan penggunaan H3PO4 sebesar 1M serta pH sebesar 11.
Co-Authors Achmad Fanani Adiman, Thareq Muhammad Fathan Agung F. Kulianto Andini, Atika Anggaraeni, Chaterine Oktavia Anggriawan, Rizqi Rendri Anisah D. Ramadhani Aprilianty, Syasmitha Lucky Ardiza, R.Muhammad Rizky Atika Andini Dewangga, Bayu S. Dian Nuraini DWI LESTARI, WAHYU Dyah Siswanti Dyah Suci Perwitasari Edahwati, Wahyu Dwi Lestari Faizin, Ahmad Khairul Falah, Ra Niyatul Fauziah Hilda Alvira Fauziah, Maria Rizky Feriyanto, Ahmad Gobel, Fendy Faizal Harya, Gyska Indah Herdiana Septiani Herdiana Septiani Ika Nawang Puspitawati Ikaputri, Aninda Indah Nur Fauziyah Issafira, Radissa Dzaky Kalimatus S Kartika Pratiwi Kurniawan, Ferdi L.Urip Widodo, Yohandrik Novel Karaman Lusy Larasati A Maria Vindri Vincensia Saru miftakhurrohman, moch Mr. Sutiyono Munandar, Siswanto Mutiya Zevi Nana Dyah Siswati, Anwar Zain and Mohammad Nandini, Atika Ndaru Adyono Ndaru Adyono, Ndaru Nikmatuz Zahra Nikmatuz Zahra Nur Fuadzi, Moh Prameswari, Devi Diyah Ayu Prayoga, Ferdiyan Tri Puspa Sari, Tria Rahmah, Nazila Alfi Rifaldo Pido Rizaldi, Ryan Rizqi Rendri Anggriawan Rizqi Rendri Anggriawan S, Sutiyono Santi, Shinta Soraya Sari, Tria Puspa Saru, Maria Vindri Vincensia Setyanugraha, Moch. Alief Soemargono Soemargono Sri Muljani Sri Redjeki SRIE MULJANI Suprihatin Susilowati MT Susilowati Susilowati Sutiyono Sutiyono . sutiyono sutiyono Titi Susilowati Tria Puspa Sari Tutuk Harsini Wahyu Dwi Lestari Wahyudi, Mohammad Rafli Alif Wiliandi Saputro Zevi, Mutiya