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All Journal Biomedical and Mechanical Engineering Journal Komunita: Jurnal Pengabdian dan Pemberdayaan Masyarakat
DWI LESTARI, WAHYU
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Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Transportation

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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.
Pelatihan Penggunaan Mesin Pengaduk Bumbu Untuk Peningkatan Produksi Keripik Pisang Koin Pada UMKM Di Desa Jajar Gumregah, Trenggalek Althafiansyah, Rafif; Achmad F, Kemas; Afif A, Dana; Ady F, Rahmad; Dwi Lestari, Wahyu; Maulana, Hendra
KOMUNITA: Jurnal Pengabdian dan Pemberdayaan Masyarakat Vol 5 No 1 (2026): Februari
Publisher : PELITA NUSA TENGGARA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.60004/komunita.v5i1.501

Abstract

Pelatihan penggunaan mesin pengaduk bumbu dilaksanakan sebagai upaya meningkatkan produktivitas dan kualitas produk keripik pisang di Desa Jajar. Kegiatan ini dilaksanakan melalui Program Pemberdayaan Desa Binaan (PDB) Kemendikbudristek tahun 2025, bekerja sama dengan civitas akademika UPN Veteran Jawa Timur dan Universitas Tulungagung. Metode pelatihan meliputi sosialisasi teknologi, demonstrasi pengoperasian mesin, serta pendampingan praktik langsung kepada UMKM mitra. Hasil kegiatan menunjukkan peningkatan efisiensi proses produksi, konsistensi rasa bumbu, dan kapasitas output keripik pisang. Pelatihan ini juga mendorong pemanfaatan teknologi tepat guna dan memperkuat kolaborasi antara akademisi, pemerintah desa, dan pelaku usaha lokal. Kesimpulan dari kegiatan ini adalah penerapan mesin pengaduk bumbu berkontribusi signifikan terhadap peningkatan produktivitas dan kualitas produk UMKM keripik pisang di Desa Jajar.
Co-Authors Achmad F, Kemas Ady F, Rahmad Afif A, Dana Althafiansyah, Rafif Andini, Atika L.Urip Widodo, Yohandrik Novel Karaman Luluk Edahwati Maulana, Hendra Ndaru Adyono, Ndaru Puspa Sari, Tria SRI SULISTIANI Sutiyono