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mining sector in the economic structure of South Kalimantan Province: direct and indirect impacts

IOP Conference Series: Earth and Environmental Science 2021年第1期882卷

作者： K S Putri Riswan I Rahman Mining Engineering Study Program Faculty of Engineering Universitas Lambung Mangkurat Banjarbaru 70714 South Kalimantan Indonesia

Supporting sectors for sustainable economic development in a region can have a direct impact on GRDP and indirectly have an impact through strong backward and forward linkage to other economic sectors. Analysis of backward and forward linkages can be performed using input-output tables that describe the role of each sector in the regional economy. The abundance of coal resources in South Kalimantan Province makes the mining sector the largest contributor to GRDP. Coal is an export commodity that has a very large percentage of the total regional export value. The enormous impact on GRDP, both in terms of business fields and final demand, is not accompanied by strong linkages to other economic sectors. The existence of the mining sector is unable to stimulate production growth in the backward sector and is unable to fulfill the final demand of the forward sector. Restrictions on coal exports to fulfill domestic energy resource needs are able to make the mining sector of South Kalimantan Province a key sector to support sustainable regional economic development.

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Innovation and utilization of coffee skin waste (Coffea robusta L) as a superior compost for the growth of pepper cuttings (Piper nigrum L.)

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AIP Conference Proceedings 2025年第1期3186卷

作者： Awalul Fatiqin Dewi Lestari R. A. Hoetary Tirta Amalia Riri Novita Sunarti Ike Apriani Anita Restu Puji Raharjeng Rr Mini Sari Wulan Thathit Suprayogi Yahya Febrianto Sudarman Rahman Shesanthi Citrariana Rokiy Alfanaar Mu’afa Purwa Arsana Yithro Serang Wansadaj Jaroenram Biology Study Program Faculty of Mathematics and Natural Sciences Palangka Raya University Palangka Raya Central Kalimantan Indonesia Biology Study Program Faculty of Science and Technology Universitas Islam Negeri Raden Fatah Palembang Palembang South Sumatra Indonesia Education Biology Study Program Faculty of Teacher Training and Education Universitas Islam Negeri Raden Fatah Palembang Palembang South Sumatra Indonesia Physics Study Program Faculty of Mathematics and Natural Sciences Palangka Raya University Palangka Raya Central Kalimantan Indonesia Pharmacy Study Program Faculty of Mathematics and Natural Sciences Palangka Raya University Palangka Raya Central Kalimantan Indonesia Chemistry Study Program Faculty of Mathematics and Natural Sciences Palangka Raya University Palangka Raya Central Kalimantan Indonesia Mathematics Study Program Faculty of Mathematics and Natural Sciences Palangka Raya University Palangka Raya Central Kalimantan Indonesia Department of applied chemistry Chaoyang University of Technology Taichung City Taiwan National center for genetic engineering and biotechnology (BIOTEC) Pathum Thani Thailand

This study aimed to determine the potential of coffee skin waste (Coffea robusta L) as a superior compost innovation for the growth of pepper-cutting seedlings (Piper nigrum L). This study used an experimental method with a completely randomized design using five treatments and five repeats, variations in the dose of coffee skin waste used P0 (control), P1 (90 g), P2 (135 g), P3 (180 g), and P4 (225 g). The shoot height, number of leaves, number of roots, and length of roots were measured. The results showed that coffee skin waste compost significantly affected shoot height, especially at P1 (90 g), resulting in an average growth height of 7.24 cm. In addition, the highest number of leaves was found at a concentration of P1 (90 g), with an average of two leaves. Although there was no significant effect on the number of roots, the concentration of P1 (90 g) yielded the best results, with an average of 33 root blades, and the best root length was obtained at the concentration of P1 (90 g), with an average of 44.6 cm. Therefore, coffee skin waste significantly influenced shoot height and the number of leaves on pepper-cut seedlings (Piper nigrum L.) in the P1 treatment (90 g).

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Enhancing removal efficiency of heavy metals and ammonia in bioretention system using quartz sand and zeolite as filter media

Enhancing removal efficiency of heavy metals and ammonia in ...

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International Conference on Science and Innovated engineering 2018, i-COSINE 2018

作者： Sari, A.Y. Suwartha, N. Hartono, D.M. Gusniani, I. Environmental Engineering Study Program Department of Civil Engineering Faculty of Engineering Universitas Indonesia Kampus UI Depok Depok16424 Indonesia

Bioretention is one of the stormwater runoff managements to reduce pollutant concentration such as heavy metals and ammonia. However, removal efficiency of bioretention was affected by variation of filter media. So, the aims of this study are to enhance removal efficiency of bioretention system. Three bioretention system were applied on pilot scale sized 30 × 30 × 80 cm3 combined with Iris pseudacorus. Variation of filter media composition of quartz sand and zeolite was used with ratio 1:3, 1:1, 3:1, on reactor 1, 2 and 3, respectively. Synthetic runoff water with different concentration were simulated. The results shown that variations in influent concentrations has small effect on the removal efficiency (20-40%). The average removal efficiency of bioretention 1, 2 and 3 for Pb was 91%, 78%, 83%, respectively, followed 88%, 95%, 94% for Zn and 97%, 98%, 96% for NH3. The combination of quartz sand and zeolite as filter media significantly enhance removal efficiency by 11,5% for NH3, 18% Pb and 20% Zn compared to previous similar research. © Published under licence by IOP Publishing Ltd.

关键词： Heavy metals

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Design prototype of audio guidance system for blind by using raspberry pi and fuzzy logic controller 2

Design prototype of audio guidance system for blind by using...

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2nd International Conference on Mechanical, Electronics, Computer, and Industrial Technology, MECnIT 2018

作者： Ma'muriyah, Ni'matul Yulianto, Andik Lili Electrical Engineering Study Program Faculty of Industrial Technology Universitas Internasional Batam Indonesia

With almost 3.75 million people with visually impaired in Indonesia, according to statistical data shown that most of them not live in prosperity. To increase their productivity they need an assistive device that's allows them to navigate freely. This paper presents a novel Audio guidance system for blind in the shape of simple bag with earphone for giving them an audio guidance efficiently and safety. Different with other audio guidance, we propose a simple system consist of Raspberry Pi Camera and Ultrasonic Sensor as input, Raspberry Pi, Earphone and Power bank. This system is initiated by providing a voice command of the direction where the blind person must walk or go through, so they can avoid from obstacles. We also apply Fuzzy Logic Controller (FLC) to detect the obstacles along they walk by using 3 ultrasonic sensors. The experimental result shows that by using FLC and interfacing by Raspberry Pi the proposed system can effectively to detect the obstacles and give direction with 2.32% distance error. © 2019 Published under licence by IOP Publishing Ltd.

关键词： Fuzzy logic

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Response analysis of groundwater-bearing layers in Bandung groundwater basin due to variations of potential ground motions from Lembang fault

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AIP Conference Proceedings 2023年第1期2598卷

作者： M. F. N. Putra L. E. Widodo Graduate Student of Groundwater Engineering Program Faculty of Earth Science and Technology Bandung Institute of Technology Bandung Indonesia Research Group on Earth Resources Exploration Faculty of Mining and Petroleum Engineering Bandung Institute of Technology Bandung Indonesia

This paper focuses on the effects of potential ground motion variations in the range of 6.6–7.2 Mw from the Lembang Fault on the dynamic response of groundwater (Gw)-bearing laye...

This paper focuses on the effects of potential ground motion variations in the range of 6.6–7.2 Mw from the Lembang Fault on the dynamic response of groundwater (Gw)-bearing layers in the Bandung Groundwater Basin. The dynamic response of the soil deposits is considered as a one-dimensional model due to the vertical shear wave propagation therein, influenced by local soil conditions or properties that are linear viscoelastic with variable damping. Meanwhile, the bedrock is considered an elastic medium upon which the shear wave propagates due to ground motion. The ground motion may cause the liquefaction of Gw-bearing layers near the bedrock with intensities starting from 6.8 Mw. Ground motions in the range of 6.6–7.2 Mw can cause peak ground acceleration at the ground surface ranging between 0.15–0.25 gal.

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The analysis of groundwater quality around a material (solid waste) recovery facility (a case study of the Merdeka 2 material recovery facility in Depok, West Java)

The analysis of groundwater quality around a material (solid...

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International Conference on Science and Innovated engineering 2018, i-COSINE 2018

作者： Adriansyah, H.S. Hartono, D.M. Suwartha, N. Gusniani, I. Environmental Engineering Study Program Department of Civil Engineering Faculty of Engineering Universitas Indonesia Kampus UI Depok Depok16424 Indonesia

Merdeka 2 Material Recovery Facility (MRF) is an organic waste management facility located in West Java. MRF also produces leachate water which came from organic waste that could potentially pollute shallow groundwater around the facility. Purpose of this study is to obtain knowledge regarding amount of MRF's waste intake and composition, composition of leachate water that came from the waste, and the groundwater quality around MRF with parameters including pH, temperature, BOD, COD, Nitrite, Nitrate, Ammonia, KMnO4, Iron (Fe), and Fecal Coliform. Quality of the groundwater was analysed by knowing pollution rate based on pollution index and its association with distance variation from MRF. Results showed that amount waste that came to the facility is 0.954 ton/day with an average of waste volume 1449.20 l/day and consists of 93.4% organic waste and 6.4% non-organic waste. For MRF's leachate water quality showed that pH, temperature, BOD and COD parameters exceeded over required standard. Shallow groundwater around MRF showed that average rate of pH, BOD, COD, Nitrate parameters is still above required standard and other parameters average is still in required standard and there is no significant correlation between distance variation with the groundwater. It can be concluded that the pollution index of the local's shallow groundwater fall into low to mid polluted category. © Published under licence by IOP Publishing Ltd.

关键词： Groundwater

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Groundwater modeling in nickel mining of Langgikima, North Konawe Regency, Southeast Sulawesi

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AIP Conference Proceedings 2023年第1期2598卷

作者： Tedy Agung Cahyadi Nur Ali Amri Kadek Nando Setiawan Muhammad Iqbal Ansori Sri Lastri Makarao Mining Engineering Study Program Universitas Pembangunan Nasional “Veteran” Yogyakarta Yogyakarta Indonesia Senior Mine Plan Engineer PT. Maha Bhakti Abadi Sulawesi Indonesia

Nickel mining activities with an open-pit mining system (surface mining) are considered as activities that have an impact on environmental damage. One issue is the impacts on groundwater. Therefore, accurate groundwater flow modeling is significant for the prevention and control of potential environmental damage. The research objectives were to build a conceptual model of the hydrogeology of the groundwater system using numerical methods, to calibrate the model by testing the Parameter Sensitivity Analysis (PSA), and to analyze the pattern of groundwater flow in the study area. The results showed that the aquifer system in the study area is a semi-unconfined aquifer. The lithology of the aquifer layer is dominated by a mixture of clay, silt, sand, gravel, and boulder. Hydraulic conductivities of aquifer layers were 5×10-6 m/sec while the conductivities of the aquitards 1 and 2 were 1.4×10−7 m/sec, 5×10−8 m/sec. Additionally, the recharge of the modeled area was 1,253.35 mm/year. The results of the sensitivity analysis of the model are most sensitive to the decrease in hydraulic conductivity in ultramafic rocks. In contrast the recharge parameter, the model is most sensitive to the addition of recharge values. The groundwater flow pattern generally from the west to the east to the northeast part of the research area.

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Effect of Pulse Parameters on the Particle Size of Copper Powder Electrodeposition 1

Effect of Pulse Parameters on the Particle Size of Copper Po...

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1st International Conference on Design and Application of engineering Materials 2018, IC-DAEM 2018 in conjunction with 11th Seminar Nasional Metalurgi dan Material, SENAMM 2018

作者： Wahyudi, S. Soepriyanto, S. Mubarok, M.Z. Sutarno Doctoral Program of Mining Engineering Faculty of Mining and Petroleum Institut Teknologi Bandung Bandung Indonesia Department of Material and Metallurgical Engineering Faculty of Engineering Institut Teknologi Sains Bandung Bekasi Indonesia Department of Metallurgical Engineering Faculty of Mining and Petroleum Institut Teknologi Bandung Bandung Indonesia Department of Metallurgical Engineering Faculty of Engineering Universitas Jenderal Achmad Yani Bandung Indonesia

In this paper, copper powder fabrication has been made via electrolysis method using CuSO4 and H2SO4 in aqueous media. Electrodeposition process of copper powder on a metallic surface is done by applying to continue current and pulse current with rectangular pulse waveform. Characterization of copper powder was carried out by SEM to confirm particle size and shape and EDX to determine the copper powder composition. In electrodeposition by applying to continue current to produce the copper powder with particle shape was dendritic, and the elemental composition of the powder was Cu and O. Regarding average particle size, pulse electrodeposition process produces the copper powder with average particle size up to 0.85μm, 72.6% smaller than if apply to continue current. © 2019 Published under licence by IOP Publishing Ltd.

关键词： Particle size

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Revealing the shear-wave velocity structure of Tangkuban Parahu Volcano, West Java, Indonesia using Ambient Noise Tomography

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Journal of Volcanology and Geothermal Research 2025年 465卷

作者： Aditya Lesmana Awali Priyono Andri D. Nugraha Zulfakriza Shindy Rosalia David P. Sahara Rexha Verdhora Ry Sri Widiyantoro Wahyu Hidayat Faiz Muttaqy Devy Kamil Syahbana Ahmad Basuki Kristianto Geophysical Engineering Study Program Faculty of Minning and Petroleum Engineering Institut Teknologi Bandung Bandung 40132 Indonesia Global Geophysics Research Group Faculty of Minning and Petroleum Engineering Institut Teknologi Bandung Bandung 40132 Indonesia Research Center for Disaster Mitigation Institut Teknologi Bandung Bandung 40132 Indonesia Faculty of Engineering Maranatha Christian University Bandung 40164 Indonesia Geophysical Engineering Study Program Faculty of Technology Mineral and Energy UPN Veteran Yogyakarta 55283 Indonesia Research Center for Geological Disaster National Research and Innovation Agency (BRIN) Bandung Indonesia Center for Volcanology and Geological Hazard Mitigation (CVGHM) Geological Agency (GA) Jalan Diponegoro No. 57 Bandung 40122 Indonesia

We present a shear-velocity model for the Tangkuban Parahu Volcano (TPV) using ambient seismic noise tomography. We used data from a three-month 55-temporary netwok deployed between October 2021 and February 2022. We cross-correlated the vertical components at each station to extract an empirical Green's function, to generate group velocity maps within the periodicity range of 1 to 6.5 s. We then construct a three-dimensional model of shear-wave velocity to a depth of 5 km below the summit. Our analysis revealed distinct patterns of high and low velocity values, associated with the presence of the old Sunda caldera, unmapped local structures, and surface geothermal manifestation around TPV. We identified low velocity zones indicative of shallow reservoirs and pathways for magma migration from the subsurface to surface crater. Additionally, high velocity zones observed, correspond to cooled magmatic bodies.

关键词： Tangkuban Parahu volcano Ambient Seismic Noise tomography Shear-wave velocity model Volcano seismology

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Floor Slab Analysis (Case study: One Residence Apartment Batam Center) 2

Floor Slab Analysis (Case Study: One Residence Apartment Bat...

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2nd International Conference on Mechanical, Electronics, Computer, and Industrial Technology, MECnIT 2018

作者： Astutik, Yayuk Setyaning Civil Engineering Study Program Planning and Civil Engineering Faculty Universitas Internasional Batam Riau Island29442 Indonesia

Reinforced concrete slab are widely used in civil buildings, including as building floors, roof floors, bridge floors and dock floors. The load acting on the slab is generally calculated against gravitational loads. This study aims to analyse floor slab in One Residence Batam Center Apartment Construction Project. The moment method is used to predict the magnitude of frame and shrinkage values that refer to 2002 of SNI. Loading is carried out from dead loads and live loads with a two-way reinforcement system. Reinforcement is done using steel with a diameter of 10 mm. So that the minimum area is 313 mm square with a distance of 250 mm and is in the safe category. From the calculation results obtained the concrete elastic modulus obtained by 250 MPa with a reinforcement ratio of 0.0025. Checking the time dependency factor for dead loads is carried out within 3 months, 6 months, 12 months and more than 5 years. Long-term deflection due to frame and shrinkage is still in the safe category. © 2019 Published under licence by IOP Publishing Ltd.

关键词： Floors

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