Jurnal Teknika: Jurnal Teoritis dan Terapan Bidang Keteknikan

ANALISIS PENGGUNAAN KAPUR TOHOR (CaO) UNTUK MENINGKATKAN KUALITAS AIR LIMBAH TAMBANG DI CV. BK PROVINSI KALIMANTAN TENGAH

2024-10-30T00:53:20+00:00

Open-pit mining can lead to the degradation of environmental quality in the areas where mining activities occur, one of which is the presence of mining wastewater that can disrupt ecosystems. The purpose of this study is to understand the liming process on mining wastewater samples and to determine the effect of quicklime on the quality of mining wastewater. The methods used in this research include qualitative and descriptive approaches. The research location is at CV. BK in Lemo I Village, Teweh Tengah District, and Bintang Ninggi I and II Villages in Teweh Selatan District. The study was conducted in early 2023. The data for this research consists of primary data, including mining wastewater samples, the quality of mining water, and doses of quicklime; as well as secondary data, including environmental management maps, regional geological maps, and location maps.

ANALISIS TINGKAT RISIKO KELELAHAN OPERATOR DUMP TRUCK DI PT. BP DESA TUMBANG OLONG I KECAMATAN UUT MURUNG KABUPATEN MURUNG RAYA

2024-10-30T00:57:10+00:00

This study aims to analyze the level of fatigue risk in dump truck (DT) operators at PT. BP located in Tumbang Olong I Village, Uut Murung District, Murung Raya Regency, Central Kalimantan Province. DT operators at PT. BP are involved in hauling work with a distance of approximately 140 km from stockpile to port. The hauling which takes approximately 6 hours is carried out with a certain trip system and speed limit. Using a qualitative approach and descriptive analysis, this study identified fatigue risk factors including work duration, work shift, rest time, workload, work environment, physical condition, sleep time, stress, and food/drink consumption patterns. Primary data (age, length of service, education, and questionnaire) were combined with secondary data (location map and delivery area, regional geological map, local geological map of IUP research area). Fatigue risk was measured through the SNI ISO 31000 standard, with risk mapping using a 5x5 risk matrix. The results of the study showed that fatigue factors consist of work and non-work factors, with four categories of risk levels: low (workload), medium (sleep time, physical condition), high (rest time, work shift, work environment, stress), and very high (work duration, food/drink). Based on these findings, company intervention is needed to control risks that are in the high and very high categories

PRODUKTIVITAS ALAT GALI MUAT DAN ANGKUT PADA KEGIATAN OVERBURDEN REMOVAL DAN COAL GETTING

2024-11-12T23:50:55+00:00

Often the production target is not achieved at PT. Satria Alam Manunggal is a problem that often occurs, this certainly disrupts the company's work cycle. For the planned Overburden Production Target at PT. Satria Alam Manunggal in June 2023 is 287,276 bcm while for coal it is 45,665 tons. However, in research carried out in that month, overburden and coal production was not achieved due to several factors, including the influence of rain, narrow fronts, and also the compatibility factor of loading and digging equipment with transport equipment. From the results of research conducted in June 2023 at PT. Satria Alam Manunggal obtained a tool compatibility calculation result of <1, meaning that the excavator loading tool only worked less than 100%, causing waiting time for the excavator loading tool, in this case it was one of the factors that caused production to not be achieved. In order to overcome these problems, the Company must make efforts to optimize the performance of mechanical equipment. By optimizing these mechanical tools, it is hoped that mining activities can be more optimal so that production can be achieved both in overburden stripping and coal production.

MERANCANG HOTEL BINTANG 5 DI PALANGKA RAYA DENGAN PENDEKATAN DESAIN GREEN ARSITEKTUR

2024-11-08T00:36:54+00:00

Its increasingly rapid development, Palangka Raya City is also developing rapidly through more advanced and competitive infrastructure. Hotels are a supporter of the economy and tourism in increasing economic and tourism growth in the City of Palangka Raya. Hotels are lodging facilities that provide accommodation, food and additional services to guests visiting Palangka Raya City. The aim of designing the hotel is to utilize building technology that applies the concept of green architecture. Design methods using qualitative methods are explored from comparative study analysis and precedent analysis. The comparative study uses a hotel function approach based on observing building objects with the same function to determine the type of hotel, types of rooms offered, circulation arrangements, utility networks and hotel facilities. Analysis of precedent studies using a green architecture approach through site analysis, circulation, analysis of renewable energy needs, shape and building appearance. The results of the Green Architecture plan in this Hotel building are implemented by utilizing reprocessed rainwater for user needs and watering plants, utilizing sunlight for natural lighting and storing thermal energy using solar panels to save energy, providing natural ventilation to obtain optimal space ventilation, also the application of a roof garden as a garden and to shade the space of a multi-story building. Green architecture applied in buildings is able to save energy and costs and does not damage the surrounding environment

UJI EKSPERIMENTAL EFEK TWIST 180˚ TERHADAP PERFORMA TURBIN HIDROKINETIK SAVONIUS TORNADO

2024-11-13T00:14:31+00:00

The problem of increasing energy demand must be balanced with energy production. The development of water-powered energy is one alternative solution for the sustainability of life on earth. The Savonius Hydrokinetic Turbine is a type of hydroelectric power plant that can convert kinetic energy into electrical energy. River currents as a renewable energy source can rotate the turbine and convert it into electricity through a generator. This study aims to determine the effect of a 180˚ twist change on the Savonius Tornado Helical Hydrokinetic Turbine with a variation of the lower end plate smaller than the upper end plate. The research method was carried out by testing 4 turbine variations, namely the Savonius Hydrokinetic Turbine and the Savonius Tornado Helical Hydrokinetic Turbine D / 2, 3D / 4 and 4D / 4, where D is the diameter of the turbine end plate. The testing process was carried out in an open prismatic channel with variations in flow speed of 0.331 m / s, 0.396 m / s and 0.486 m / s. The results of the study showed that the Savonius Hydrokinetic Turbine produced a Cp (Coefficient of power) value of 0.114 - 0.226 and a TSR (Tip Speed Ratio) of 1.550 - 1.775. The performance of the Savonius Tornado Helical Hydrokinetic Turbine with end plate D / 2 was significantly higher than the Savonius Hydrokinetic Turbine, with an increase in Cp value of 11% and TSR of 12.6%. The Savonius Tornado Helical Hydrokinetic Turbine with end plate 3D / 4 increased the Cp and TSR values by 6.6% and 10%. While the Savonius Tornado Helical Hydrokinetic Turbine with end plate 4D / 4 was able to increase the Cp value by 0.4% and TSR by 2.4%.

PERBANDINGAN VARIASI MEDIA FILTER NON ALAMI PADA PENJERNIH AIR SARANG TAWON TERHADAP pH DAN TDS

2024-11-12T23:53:32+00:00

Water is a variety of needs in everyday life. Raw water in Palangka Raya City is still influenced by peat water which has a low pH, while river water has quite high turbidity due to sedimentation. For residential areas that are far from the reach of PDAM, it will be difficult to get clean water and there is no fast technology to handle the decrease in acidity. An alternative innovation that can be used by people who are far from the reach of PDAM is to use appropriate technology tools for wasp nest water purifiers. The purpose of the study was to obtain a comparison of water treatment results from several variations of non-natural filter media in wasp nest water purifiers against pH and TDS. The method used in this experimental test was to test short, medium, and high wasp nest water purifiers with a filtration hole size of 0.25 cm and a distance between holes of 0.5 cm. The volume of non-natural filter media in various sizes of wasp nest water purifiers was conditioned the same in each experiment. The filtration process uses 4 pumps with a pump discharge of 45 l/minute each. The results obtained indicate that the filtration type water purifier functions well and is able to increase pH. There is an increase in the TDS parameter because during the water circulation process there is uncontrolled mixing of the filter media.