Gutters made of glass-fibre-reinforced polymer (GFRP) are usually produced with a three-millimetre thickness. The fillers are mixed into unsaturated polyester (UP) resin, which is intended to make the composite material more affordable. This study aims to examine the effects of the addition of alumina trihydrate (ATH), calcium carbonate (CC), and a mixture of ATH and CC of 15 and 30 parts per hundredweight of resins (PHR) on the material properties of the three-millimetre-thick three-layered GFRP composites. The properties observed included physical properties, namely, specific gravity and water absorption, chemical properties such as burning rate, and mechanical properties such as hardness, flexural strength, and toughness. The effects of the fillers on the voids and interfacial bond between the reinforcing fibre and matrix were analysed using the flexural fracture observation through scanning electron microscopy (SEM). The results showed that the addition of fillers into the UP resin led to an increase in the density, hardness, flexural strength, modulus of elasticity, and toughness but a decrease in water absorption and burning rate in a horizontal position. This information can be helpful for manufacturers of gutters made of GFRP in selecting the appropriate constituent materials while considering the technical and economic properties.
Sampora Village is a partner village of the Faculty of Engineering, the Atma Jaya Catholic University of Indonesia, which is located in the South Tangerang district. Since 2019, the Faculty of Engineering has collaborated with the Sampora Village Head in developing catfish cultivation and hydroponic entrepreneurship. The implementation of this collaboration program is carried out by lecturers and students of the Faculty of Engineering with the Village Owned Enterprise (Bumdes) Sampora, involving village communities. The results of catfish cultivation can be directly sold to restaurants or stalls around South Tangerang. The catfish harvest can also be made into floss as ready-to-eat dry food products that can be sold in packages. To make catfish floss, it takes a process of frying catfish that has been processed with spices, then drained to reduce the oil. The process of draining the oil manually with a sieve will produce floss that is wet and easily rancid because much the oil content. To produce dry floss, a spinner machine, which will produce dry catfish floss and can be stored for a longer period. Parameters of spinner machine operating time using a timer. The use of a spinner as an oil drain requires the right operating time so that the catfish floss produced is drier and has a minimal oil content. The method used is to conduct training in operating a spinner machine to drain oil on catfish floss. Catfish floss that has been processed using a spinner becomes drier and crispier, so it can be stored for a longer time.Desa Sampora merupakan desa mitra Fakultas Teknik, Unika Atma Jaya, yang berada di kabupaten Tangerang Selatan. Sejak tahun 2019, Fakultas Teknik telah menjalin kerjasama dengan Kepala Desa Sampora dalam pengembangan kewirausahaan budidaya lele dan hidroponik. Pelaksanaan program kerjasama ini dilakukan oleh dosen dan mahasiswa Fakultas Teknik dengan Badan Usaha Milik Desa (Bumdes) Sampora, dengan melibatkan masyarakat desa. Hasil budidaya lele dapat langsung dijual ke restoran atau warung di sekitar Tangerang Selatan. Hasil panen lele juga dapat dibuat abon sebagai produk makanan kering siap saji yang dapat dijual dalam kemasan. Untuk membuat abon lele dibutuhkan proses menggoreng lele yang telah diolah dengan bumbu, kemudian ditiriskan agar mengurangi minyak pada abon. Proses penirisan minyak secara manual dengan saringan akan menghasilkan abon yang basah dan mudah tengik karena kandungan minyaknya masih tinggi. Untuk menghasilkan abon kering diperlukan mesin spinner sebagai peniris minyak, yang akan menghasilkan abon lele yang kering dan tahan disimpan dalam waktu yang lebih lama. Parameter waktu pengoperasian mesin spinner menggunakan alat timer. Penggunaan spinner sebagai peniris minyak membutuhkan waktu pengoperasian yang tepat agar abon lele yang dihasilkan lebih kering dan kadar minyaknya minimal. Metode yang digunakan adalah mengadakan pelatihan dalam mengoperasikan mesin spinner untuk meniriskan minyak pada abon lele. Abon yang diproses menggunakan spinner menjadi lebih kering dan renyah, sehingga dapat disimpan dalam waktu yang lebih lama.
Aquaponic is a combination hydroponic (cultivation of plants without soil) and aquaculture (fish growing) that promotes sustainable food production. In order to be adopted by general population, the design of aquaponics needs to be practical and economical. The main purpose of this community outreach is to design and introduce small-scale aquaponics system that can be used by homeowners with limited backyard. For this purpose, the community located at Kelapa Dua Tangerang was chosen as the main partner. The prototype of the small-scale aquaponics was then used as education and demonstration tool to encourage the community of Kelapa Dua Tangerang to adopt eco-friendly aquaponics cultivation system. The prototype of the aquaponics worked flawlessly with the water circulation inside the system was set at 0.046 litre/second. The water was used to supply adequate nutriens for water spinach, lettuce and pak choy which can be harvested in two months. In addition, this leafy greens can enhance the overall yard aesthetics. For the aquaculture, the catfish in the tank showed steady grow rate and healthy condition. In general, the education process can be considered successful as indicated by positive responses from the community (feedback score of 2.93 out of 4). From joint evaluation, the community excited with further development of the small-scale aquaponics.
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