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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.
Pengembangan Model Edupreneurship sebagai Upaya Peningkatan Daya Tarik Wisata Pantai Pudak, Kabupaten Blitar Zamrodah, Yuhanin; Aditya Prayudhi, Luhur; Siswati, Endah; Dwi Lestari, Wahyu; Abidin Achmad, Zainal; Aqidatun Nisa, Diana
Indonesian Journal of Society Engagement Vol. 6 No. 3: Desember 2025
Publisher : Lembaga Kajian Demokrasi dan Pemberdayaan Masyarakat (LKD-PM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33753/ijse.v6i3.258

Abstract

The development of Pudak Beach, located in Ngadipuro Village, Wonotirto District, Blitar Regency, as a tourist destination is not simply about creating a tourist attraction, but rather a comprehensive strategy aimed at improving the welfare of the local community while preserving the environment. By optimizing the surrounding natural and cultural potential, investment in tourism can generate new employment opportunities, strengthen the creative economy sector, and increase local income—particularly through community-based tourism products and services. This community service program aims to develop an edupreneurship model that aligns with the social, economic, and cultural characteristics of the communities surrounding Pantai Pudak, Blitar Regency. The activities include needs assessment, entrepreneurship training (such as batik-making, visual branding, labeling and packaging), and digital marketing workshops. The program involved observation and interviews with Bumdes Estu Maju and Pokdarwis Dewatapuro, providing hands-on training while assessing participants’ enthusiasm and skill development throughout the process. The outcomes of the training and socialization activities successfully enhanced participants’ knowledge and understanding of hand-drawn batik techniques, visual branding, product labeling and packaging, as well as digital marketing. The significant improvement in skills and entrepreneurial capacity is expected to enable the community to manage local businesses more effectively, comprehend modern marketing concepts, and cultivate greater awareness of the importance of collaboration in sustaining and developing tourism potential. Furthermore, this program is expected to strengthen the community’s capacity as education- and economy-oriented tourism actors and provide recommendations for replicating the model in other coastal destinations. Abstrak Pengembangan Pantai Pudak yang terletak di Desa Ngadipuro, Kecamatan Wonotirto, Kabupaten Blitar ini sebagai destinasi wisata bukan sekadar menciptakan tempat wisata, melainkan strategi komprehensif yang bertujuan meningkatkan kesejahteraan masyarakat setempat sekaligus menjaga kelestarian lingkungan. Dengan mengoptimalkan potensi alam dan budaya di sekitarnya, investasi di bidang pariwisata dapat menciptakan lapangan kerja baru, memperkuat sektor ekonomi kreatif, dan meningkatkan pendapatan masyarakat, terutama melalui produk dan layanan pariwisata berbasis komunitas. Program pengabdian masyarakat ini bertujuan mengembangkan model edupreneurship yang selaras dengan karakteristik sosial, ekonomi, dan budaya masyarakat di sekitar Pantai Pudak, Kabupaten Blitar. Kegiatannya meliputi kajian kebutuhan, pelatihan kewirausahaan (pembuatan batik, visual branding, labelling, dan pengemasan produk), serta pelatihan pemasaran digital. Program ini melibatkan observasi dan wawancara dengan Bumdes Estu Maju dan Pokdarwis Dewatapuro, pemberian pelatihan praktis, sekaligus penilaian antusiasme dan pengembangan keterampilan peserta selama proses pelatihan. Kegiatan pelatihan dan sosialisasi ini berhasil meningkatkan pengetahuan dan pemahaman peserta tentang teknik batik tulis, visual branding, labelling dan pengemasan produk, serta pemasaran digital. Peningkatan keterampilan dan kapasitas kewirausahaan yang signifikan diharapkan dapat memampukan masyarakat mengelola usaha secara lebih efektif, memahami konsep pemasaran modern, dan menumbuhkan kesadaran yang lebih besar akan pentingnya kolaborasi dalam mempertahankan dan mengembangkan potensi wisata. Lebih lanjut, program ini diharapkan dapat memperkuat kapasitas masyarakat sebagai pelaku wisata yang berorientasi pada pendidikan dan ekonomi, serta memberikan rekomendasi untuk mereplikasi model ini pada destinasi pesisir lainnya. Kata Kunci: edupreneurship; wisata; pantai pudak