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All Journal MACHINERY: Jurnal Teknologi Terapan NuCSJo : Nusantara Community Service Journal
Sanchia Samosir, Devina
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Biochemistry, Genetics & Molecular Biology Control & Systems Engineering Education Energy Environmental Science Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Other

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Penerapan Teknologi Aerasi–Filtrasi untuk Peningkatan Kualitas Air Bersih di TKIT–SDIT Bintang Bangsa Balikpapan Randis, Randis; Azmanajaya, Emil; Hermansyah, Hadi; Damayanti, Lilik; Fatmawati, Fatmawati; Sanchia Samosir, Devina; Sulistianto, Dedy
NuCSJo : Nusantara Community Service Journal Vol. 2 No. 2 (2025)
Publisher : Lembaga Penelitian Dan Publikasi Ilmiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70437/bqmced25

Abstract

Ketersediaan air bersih di lembaga pendidikan dasar kerap terkendala kualitas air tanah yang mengandung besi (Fe) dan mangan (Mn) melebihi baku mutu. Kegiatan Pengabdian kepada Masyarakat (PKM) ini bertujuan meningkatkan kualitas air di TKIT–SDIT Bintang Bangsa Balikpapan melalui penerapan teknologi tepat guna (TTG) aerasi–filtrasi yang hemat biaya dan mudah dirawat. Kegiatan meliputi survei kualitas air, perancangan–fabrikasi sistem, instalasi–uji fungsi, pelatihan operasi–perawatan, serta monitoring–evaluasi. Sistem yang dibangun berkapasitas ±800 L/jam (≈6.000 L/hari), terdiri dari head aerator pipa perforasi, tray aerator tiga tingkat, dan tabung filtrasi berlapis (kerikil, pasir silika, mangan zeolit, karbon aktif), digerakkan pompa 90 W dan diintegrasikan ke tandon serta jaringan distribusi sekolah. Uji lapangan pada 18 Oktober 2025 menunjukkan penurunan kadar Fe sebesar ±80% (1,5 mg/L menjadi <0,3 mg/L), Mn sebesar ±85–90% (1,0 mg/L menjadi ±0,1 mg/L), kenaikan pH dari 6,0 menjadi 7,0, serta penurunan kekeruhan hingga <5 NTU; seluruh parameter memenuhi Permenkes No. 32/2017. Dampak sosial mencakup peningkatan partisipasi dan kapasitas warga sekolah (pelatihan, backwash rutin, pencatatan monitoring), sehingga sistem beroperasi mandiri dan berkelanjutan. Kegiatan ini berkontribusi pada pencapaian SDG 6, serta mendukung SDG 3, SDG 4, dan SDG 17 melalui kolaborasi perguruan tinggi–sekolah. Model desain dan pendampingan yang dihasilkan berpotensi direplikasi pada sekolah/pesantren dengan karakteristik serupa.
Analisis Ketangguhan Impak dan Karakter Patahan Komposit Sandwich Serat Rami–Epoksi Berbasis Corrugate Cardboard Zulkifli, Zulkifli; Dharmawan, Ida Bagus; Akbar , Syaeful; Zulfati Yusrina , Yasmin; Sanchia Samosir, Devina; Amin , Mohamad; Prayoga, Rafli
MACHINERY Jurnal Teknologi Terapan Vol. 6 No. 3 (2025): Machinery: Jurnal Teknologi Terapan
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36257/machinery.v6i3.11401

Abstract

The combination of hemp fibers and epoxy resin in a sandwich structure offers a balance between stiffness and light weight, especially when using corrugated cardboard as the core material. However, the effect of fiber orientation on impact energy absorption and fracture characteristics in natural fiber-based sandwich composites has rarely been studied in depth. This study aims to analyze the effect of fiber orientation on the impact toughness and fracture morphology of hemp fiber–epoxy sandwich composites with corrugated cardboard cores. Hemp fiber is used as a natural reinforcement because it is lightweight, renewable, and has good mechanical strength. The composite panels were arranged in three fiber orientations —longitudinal (0°), transverse (90°), and plain weave —using the vacuum bagging method. Bisphenol-A epoxy resin served as the matrix, while the core came from double-wall cigarette carton waste. Impact testing was conducted using the Charpy method in a flatwise configuration in accordance with ISO 179-1:2023 to assess the panel's ability to absorb impact energy. The results show that fiber orientation significantly affects energy absorption and impact toughness. The 0° orientation produced the highest energy (2.854 J) and toughness of 30.43 kJ/m², while the 90° and plain weave orientations decreased by 36% and 70%, respectively. Macroscopic observations revealed characteristic failure patterns: 0° exhibited microcracks and core shear fractures; 90° showed fiber pull-out and delamination; while Plain weave displayed fiber bridging and brittle cracks. Longitudinal orientation provided the best impact toughness and the most efficient load transfer
Co-Authors Akbar , Syaeful Amin , Mohamad Azmanajaya, Emil Fatmawati, Fatmawati Hadi Hermansyah, Hadi Ida Bagus Dharmawan, Ida Bagus Lilik Damayanti, Lilik Prayoga, Rafli Randis Randis Sulistianto, Dedy Zulfati Yusrina , Yasmin Zulkifli Zulkifli