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Luluk Edahwati
UPN Veteran Jawa Timur
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Journal : Biomedical and Mechanical Engineering Journal

 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.
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.
Struvite Mineral Synthesis from Laundry Waste Water Sutiyono; Edahwati, Luluk; Indah Nur Fauziyah; Lusy Larasati A
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.v3i2.87

Abstract

Struvite is a white crystal chemically known as magnesium ammonium phosphorus hexahydrate (MgNH4PO4.6H2O). This mineral has a hardness of 1.5 to 2 Mohs. Struvite is easily soluble under acidic conditions and slightly soluble under neutral and alkaline conditions. In industry, struvite is found in the crust of pipes through which hot fluids pass. Struvite is often used as fertilizer because of its phosphate content. The formation of struvite minerals (hereinafter MAP) from laundry waste water is carried out using an aeration tank. MAP solution is made by reacting laundry waste water with Phosphoric Acid (H3PO4) and Ammonium Hydroxide (NH4OH). The MAP ratio was set at 1:1:1 with a temperature of 20 - 40 oC and an air flow rate of 0.5 - 1.5 liters per minute. The best results were at a temperature of 25oC with an air flow rate of 1 (Liter / minute) with a magnesium content of 10% and phosphorus of 42%.
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