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PENGGUNAAN RAMBUT MANUSIA PADA DESAIN PENYARING PENCEMARAN DARI PENDINGIN MESIN DIESEL PERAHU NELAYAN Mudina Rachmadhan, Herhawa
Journal Sains dan Teknologi Budidaya Perairan (SINTASAN) Vol 1 No 2: Oktober 2023
Publisher : Universitas Pancasakti Tegal

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24905/sintasan.v1i2.24

Abstract

Most of Indonesia's territory is sea, so many of its residents work as fishermen. When operating, fishermen use boats with paddles or engines. The type of engine used is a liquid-cooled diesel engine with an open cooling system. This machine is widely used because it is practical, without the need to fill or replace the coolant. The way it works is that sea water is sucked into the engine cooling system, then circulates in the engine to absorb heat, then thrown back into the sea without a filtering process. This causes pollutants such as rust, scale and lubricating oil from the engine to be thrown into the sea. Sea water contaminated with these pollutants is dangerous for the marine ecosystem. This research aims to design a diesel engine cooling exhaust water filter device with an open cooling system. By using human hair as an oil absorbent material, as well as sponge and cotton filters to filter pollutant particles. The research method uses descriptive analysis through field observations and the internet, followed by designing an image of a filter device called PERAMA. As a result of this PERAMA design, in the next stage a prototype will be made, it is hoped that this prototype will be able to filter pollutants carried by fishing boat diesel engine cooling waste water, so that pollution due to engine cooling waste water can be minimized.
PEMANFAATAN DAUN SUKUN ( ARTOCARPUS COMMUNIS ) SEBAGAI BAHAN ADITIF ALAMI PAKAN IKAN DALAM BUDIDAYAIKAN BANDENG (CHANOS-CHANOS FORSKAL) Mudina Rachmadhan, Herhawa
Journal Sains dan Teknologi Budidaya Perairan (SINTASAN) Vol 1 No 2: Oktober 2023
Publisher : Universitas Pancasakti Tegal

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24905/sintasan.v1i2.26

Abstract

Milkfish is the result of ponds, where the cultivation of this animal was initially a side job for fishermen who could not go to sea. That is why, traditionally, ponds are located on the coast. The high price of commercial feed is the main obstacle; therefore, using breadfruit leaves (Artocarpus communis) as a fish feed additive is necessary. This research aims to: 1) Measure the protein, fat, carbohydrate, crude fiber, ash, and water content in feed using breadfruit (Artocarpus communis) leaves with different formulations. 2) Knowing how adding fish feed additives with different formulations affects survival, growth, and fish protein content. This research used a Completely Randomized Design (CRD) method with 4 treatments and 3 replications. The differences in treatment were by differentiating the composition of 20% protein content and the same additives (P1 = 20%), the composition of 25% protein content and the same additives (P2 = 25%), the composition of the protein content is 30%, and the same additives (P3 = 30%), the composition of the protein content is 40% and the same additives (P4 = 40%). The research results show that Providing different types of feed had a very significant effect (P<0.01) on absolute individual growth, relative growth, survival, and feed conversion of milkfish (Chanos-chanos Forskal) and had a significant effect (P<0.05) on daily growth rate. , but did not affect the length growth of milkfish (Chanos-chanos Forskal). The highest daily growth rate, absolute individual growth, and relative growth were achieved by PI treatment, namely by feeding anchovy fish. The highest survival was achieved by treatment P2 (82%), followed by treatment P3 (77%). The lowest feed conversion was achieved in treatment P3 (2.02%), then feed conversion will increase further in treatment P2 (2.66%), treatment P4 (2.76%), and treatment P1 (2.93%). The water quality between treatments was in a range that supported the growth of milkfish (Chanos-chanos Forskal). Utilization of breadfruit leaves as an additive with the right concentration to be used as fish feed.