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All Journal Biomedical and Mechanical Engineering Journal Jurnal Akademik Pengabdian Masyarakat
Atika Andini
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Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation

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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

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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 Luluk Edahwati; Sutiyono; Atika Andini; Wahyu Dwi Lestari; Tria Puspa Sari; Ndaru Adyono; Novel Karaman
BIOMEJ Vol. 1 No. 1 (2021): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

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

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.
The Solid-Liquid Mass Transfer Analysis for Delignification Process of Coffee Husk in Stirred Reactor Atika Andini; Luluk Edahwati; S D Nurherdiana
BIOMEJ Vol. 1 No. 2 (2021): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

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Abstract

The delignification process using the organosolv method is a process of removing lignin content by using organic solvents (such as ethanol). In this study, mass transfer analysis was used to determine the mass transfer coefficient of the delignification process of coffee husk. The first process was incubation process by using white rot fungi (Phanerochaete chrysosporium )in the coffee husk biomass, then followed by hydrolyzed process by using citric acid as a organosolv solvent. The delignification process were carried out under a conditions of temperature 50°C, solvent or etanol concentration 25%, speed range (500-700 rpm) and stirring time (1-4 hours with the gradient of 0,5 hours). The mass transfer effect was determined for different speed range and stirring time. From this research, the result of the mass transfer coefficient has range of 0.064/s – 0.46/s. The increasing of stirring time will affect to the mass transfer coefficient, which is also increasingly depend on the stirring time.
Co-Authors L.Urip Widodo, Yohandrik Novel Karaman Luluk edahwati Luluk Edahwati Ndaru Adyono S D Nurherdiana Sutiyono Sutiyono Sutiyono Tria Puspa Sari Wahyu Dwi Lestari