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All Journal Jurnal Teknik Lingkungan Jurnal Rekayasa Tropis, Teknologi, dan Inovasi (RETROTEKIN)
Sekar Inggar Rengganis
Universitas Balikpapan
Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Environmental Science

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Upaya Penurunan Kehilangan Air Menggunakan Metode Water Balance (Teknik Step Test - Sounding) Dan Analisis Finansial (Studi Kasus: Graha Indah, Pdam Tirta Manggar Kota Balikpapan) Sekar Inggar Rengganis
Jurnal Teknik Lingkungan Vol. 28 No. 1 (2022): Jurnal Teknik Lingkungan
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.tl.2021.28.1.2

Abstract

The most common problems that occur in the distribution of drinking water are mainly caused by the high rate of water loss or Non-Revenue Water (NRW). According to the results of research in both DMA Graha Indah namely DMA Graha Indah 1 and DMA Graha Indah 2 have a fairly high rate of water loss that is for DMA Graha Indah 1 46.94% (78% physical loss; 22% non-physical loss) which is equivalent to 163,012 m3/ year and DMA Graha Indah 2 is 59.2% (87% physical loss; 13% non-physical loss) or 211,017 m3/ year. This research outlines using the Method Water Balance (WB) which includes techniques step test, sounding, and efforts to repair pipe leaks while for non-physical losses with water meter accuracy techniques. The results obtained after the repair of the leak is a decrease in the physical loss by 4% for DMA Graha Indah 1 and 41.16% DMA Graha Indah 2. This study also made a piping network simulation using the WaterCAD software V8i so that it can be ascertained that pipelines are leaking in the area by looking at the pressure drop along the pipe section. In striving to reduce water loss in the Graha Indah Area, 3 scenarios are made, for all scenarios remaining 5% are non-physical losses, while for physical scenarios there are remaining 10%, 7,5%, and 5%, respectively, and then all financial scenarios are analyzed financially. with an analysis period of 5 years. The chosen scenario based on the financial feasibility with an analysis period as long as 5 years (i=4.98%). The results of financial feasibility proves that scenario 3 is a selected scenario for DMA Graha Indah 1 which NPV, BCR, and BEP values ​​respectively Rp. 9,430,810,135; 3.3295; 0.1086 and for DMA Graha Indah 2 the chosen scenario is scenario 3 which NPV, BCR, and BEP values respectively Rp 8,417,476,299; 2.767; 0.146.
Economy Circular Pengelolaan Sampah Organik Pasar di Peternakan Sapi dari Hulu hingga Hilir (Studi Kasus di Kelompok Tani Sumber Makmur, Gunung Tembak Kota Balikpapan) Sekar Inggar Rengganis; Noneng Dewi Zannaria; Reno Pratiwi; Ika Bayu Kartikasari; Galuh Boyo Munanto; Evi Oktavia
Jurnal Rekayasa Tropis, Teknologi, dan Inovasi (RETROTEKIN) Vol. 1 No. 2 (2023): RETROTEKIN (Rekayasa Tropis, Teknologi, dan Inovasi)
Publisher : Fakultas Teknik Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Management of market organic waste in Balikpapan City is an important thing to do to reduce the burden on Manggar TPA. Organic waste, especially market organic waste, which continues to increase along with the rapid growth of the population in Balikpapan City as a buffer city for the IKN can increase the risk of environmental pollution and safety. Market organic waste can be used as an alternative feed for cattle and goats and this has been done by the Sumber Makmur Farmer Group, Gunung Tembak, Balikpapan City. In addition to utilizing market organic waste as cattle and goat feed, the Sumber Makmur Farmer Group has also managed cow manure in the form of solid and liquid into solid organic fertilizer and liquid organic fertilizer. Thus there has been a series of Economy circular which can be an alternative in overcoming the problem of market organic waste in the Balikpapan city as well as increasing economic value. The method in this study uses a descriptive-qualitative method with a design action research model or action research by observing directly to obtain information from the object of study. Discussion of this research is divided into 4 parts such us System for Utilizing Market Organic Waste as Cattle and Goat Feed, the system for utilizing solid cow manure, the system for utilizing liquid cow manure, the potential for managing cattle and goat farms based on an economy circular. The results of observations at the Sumber Makmur Farmer Group, Gunung Tembak, Balikpapan City, show that there have been livestock management activities that apply an economy circular from upstream to downstream. Furthermore, it is hoped that further and in-depth research can be carried out in terms of economy circular-based livestock management in the utilization of organic waste as animal feed so that it can provide more comprehensive information to the wider community so that they can implement this system. Keyword: market organic waste, farming, animal feed, economic circular, manure
Co-Authors Evi Oktavia Galuh Boyo Munanto Ika Bayu Kartikasari Noneng Dewi Zannaria Reno Pratiwi