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Prosiding Seminar Nasional Teknoka
Published by Universitas Muhammadiyah Prof. Dr. Hamka
ISSN : -     EISSN : -     DOI : -
Core Subject : Engineering,
Engineering
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Articles 400 Documents
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Penerapan E-Commerce untuk Pemasaran Pertanian: Evaluasi Usability, Pengalaman Pengguna, dan Dampak Positif "Gawosa Shop" Mahendra, Christy; Lianawati, Yosita; Wicaksono, Wilibrodus Megandika; Wijaya, Jonathan Briant; Santosa, Agnes Florentina; Kinanti, Maria Putri
Prosiding Seminar Nasional Teknoka Vol 10 (2025): Proceeding of TEKNOKA National Seminar - 10
Publisher : Fakultas Teknik, Universitas Muhammadiyah Prof. Dr. Hamka, Jakarta

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Abstract

Farmers in Gumiwang Village face significant challenges in marketing their harvests. To address this issue, the "Gawosa Shop" e-commerce platform was developed. This study evaluates the platform's usability, user experience (UX), and its impact on sales. Interface testing using the System Usability Scale (SUS) yielded an average score of 83.92, which is categorized as "Excellent." User Experience Questionnaire (UEQ) testing, which assessed six components (Attractiveness, Perspicuity, Efficiency, Dependability, Stimulation, and Novelty), showed results ranging from Good to Excellent. During the implementation period from October 1 to November 5, 2025, Gawosa Shop successfully increased revenue by 21.2% and the total number of orders by 116.7%. These findings indicate that Gawosa Shop is effective, well-received by its users, and provides a positive economic impact for the farmers in Gumiwang Village.
Kalibrasi dan Validasi Sensor pH E-201C-Blue dan TDS Meter V1 pada Sistem Hidroponik Otomatis Berbasis IoT di Aswana Hidroponik Rahardjo, Mikha El Charisto; Baraga, Bernaditus Yordan; Joyopranoto, Vincensius Agung Wibowo; Mahendra, Christy
Prosiding Seminar Nasional Teknoka Vol 10 (2025): Proceeding of TEKNOKA National Seminar - 10
Publisher : Fakultas Teknik, Universitas Muhammadiyah Prof. Dr. Hamka, Jakarta

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Abstract

This study aims to calibrate and validate the pH E-201C-Blue sensor and TDS Meter V1 implemented in an IoT-based automatic hydroponic system at Aswana Hydroponic, Purwokerto. The calibration process was carried out using a multi-point method with standard buffer solutions (pH 4, 7, and 10) and TDS solutions ranging from 500 to 1500 ppm to achieve optimal accuracy. An ESP32 microcontroller was used as the main controller and data transmitter to a cloud-based monitoring dashboard. The results showed that after calibration, the sensor achieved high accuracy with a correlation coefficient (R2) above 0.98 and an average error below 5%. These findings indicate that low-cost commercial sensors can provide reliable performance in automated hydroponic system, supporting time efficiency and improving crop productivity at Aswana Hydroponic, Purwokerto.
Otomatisasi Pengatur pH dan Nutrisi pada Tanaman Hidroponik Berbasis Internet of Things di Aswana Hidroponik Joyopranoto, Vincensius Agung Wibowo; Baraga, Bernaditus Yordan; Rahardjo, Mikha El Charisto; Mahendra, Christy; Lianawati, Yosita
Prosiding Seminar Nasional Teknoka Vol 10 (2025): Proceeding of TEKNOKA National Seminar - 10
Publisher : Fakultas Teknik, Universitas Muhammadiyah Prof. Dr. Hamka, Jakarta

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Abstract

This study discusses the design of an automated pH and nutrient control system for hydroponic plants based on the Internet of Things (IoT). The objective of this study to develop a system capable of reading solution conditions and sending data in real time through an IoT platform to facilitate monitoring without manual intervention. The system is designed using an ESP32 microcontroller as the control center, a pH sensor, a TDS meter sensor, and a peristaltic pump for the solution injection process. The sensor reading data is sent to the IoT server using the Blynk platform. The test results show that system is capable of sending valid and consistent pH and TDS data to the Blynk dashboard with an accuracy level ±98%, making it easier for users to monitor the condition of the nutrient solution remotely. This research is the first step towards an efficient and integrated automatic hydroponic control system.
Optimalisasi Konsumsi Fuel gas pada Boiler dengan Implementasi Sistem Kontrol Oxygen Excess Auto Cascade Hidayat, Muhammad Taufik; Irawan, Bambang
Prosiding Seminar Nasional Teknoka Vol 10 (2025): Proceeding of TEKNOKA National Seminar - 10
Publisher : Fakultas Teknik, Universitas Muhammadiyah Prof. Dr. Hamka, Jakarta

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Abstract

Boilers accounted for 99.8% of total energy consumption at Badak LNG refinery. Of this usage, 15.1% was lost through blowdown, flue gas, and other boiler inefficiencies. The combustion control system was redesigned using a cascade configuration between the excess-oxygen loop (AIC-1) and the air-flow control loop (FIC-1). Each loop was modeled to obtain transfer functions that were then used to simulate responses to possible input disturbances. The simulation results yielded PID parameters that guided on-site loop tuning. In addition, layered logic protection and new alarms were integrated into the control system. As a result, system reliability was validated under external extremes, including abrupt boiler load increases and decreases. The optimization reduced the fuel-to-steam ratio by 0.6 Nm³/ton with the average boiler load over the past year of 207.6 ton/h, this corresponded to a 0.72% reduction in fuel-gas consumption.
Studi Kelayakan Pabrik Dodecylbenzene Sulfonic Acid dari Sulfur Dioksida Pada Gas Buang PLTU At Taufiq, Putri Zahra; Nursanto, Eduardus Budi
Prosiding Seminar Nasional Teknoka Vol 10 (2025): Proceeding of TEKNOKA National Seminar - 10
Publisher : Fakultas Teknik, Universitas Muhammadiyah Prof. Dr. Hamka, Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22236/teknoka.v10i1.22378

Abstract

The increase in population is directly proportional to the demand for energy. Fossil fuels serve as the main energy source in various industries, including electricity generation through PLTU (Steam Power Plant). These plants produce flue gases containing various components, among which sulfur dioxide (SO2) is a major pollutant whose concentration is strictly regulated. Utilizing SO2 as a raw material for producing Dodecylbenzene Sulfonoc Acid – a surfactant compound – can reduce SO2 emissions from PLTU by up ti 98%. The feasibility of this plant was assessed through a techno-economic study using ROI (Return of Investment), POT (Pay Out Time), and BEP (Break Even Point) analyses. The results indicate an ROI of 35.18%, a POT of 2.18 years, and a BEP of 15.76%, demostrating that the proposed plant is economically feasible to establish.
Identifikasi Anomali dan Dampak Perbaikan Sistem Automatic Transfer Switch (ATS) terhadap Kontinuitas Pasokan Listrik di PT. PLN UP3 Tanjung Priok Koerniawan, Tony; Hasanah, Aas Wasri; Nugraha, Shafa Khairunisa; Kurniawan, Sandi Budi; Yudho, Satrio; Nursita, Ersalia Dewi
Prosiding Seminar Nasional Teknoka Vol 10 (2025): Proceeding of TEKNOKA National Seminar - 10
Publisher : Fakultas Teknik, Universitas Muhammadiyah Prof. Dr. Hamka, Jakarta

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Abstract

Disruptions to the Automatic Transfer Switch (ATS) system can reduce the reliability of the electricity supply, especially for priority customers. This study aims to identify anomalies occurring in the ATS system in the PT. PLN (Persero) UP3 Tanjung Priok area. The methods used include field observations, technical inspections of ATS components, switching time measurements, and estimates of unsupplied energy. Anomalies were found at three locations, namely SMU 110 Jakarta, the Water Management Public Works Sub-Department, and the Sunter Environmental Development Supervisory Agency, with the main damage occurring to the rectifier and ATS module. This damage caused automatic switching failure and interruption of the electricity supply during the repair process, resulting in a total energy loss of 330.640 kWh. After repairs were completed, the entire ATS system resumed functioning with a switching time of < 1 second, in accordance with standards. The results of this study indicate that anomalies in ATS components have a significant impact on the continuity of electricity supply, but can be effectively addressed through appropriate technical repairs.
PERANCANGAN SAKLAR OTOMATIS MENGGUNAKAN MICROCONTROLLER BERBASIS TEKNOLOGI INTERNET OF THINGS (IOT) Sofia Pinardi; Emilia Roza; Muhammad Alviani; Akbar Shah Rukh Khan
Prosiding Seminar Nasional Teknoka Vol 10 (2025): Proceeding of TEKNOKA National Seminar - 10
Publisher : Fakultas Teknik, Universitas Muhammadiyah Prof. Dr. Hamka, Jakarta

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Abstract

Water and electricity are very vital human needs; it’s necessary to use them efficiently. The use of a water reservoir is a solution, and the machine can be set ON OFF using a float indicator. When the machine is ON, it fills the water, and is full, switch OFF and ON again when the water reaches a certain height. The ON-OFF process of the pump machine automatically occurs when the power plugged in; this condition is very dangerous, causing heat, and empty house, switch is always ON. Remote automatic is required. This automatic uses a quasi-experimental method with three stages, namely making a design, conducting tests, and analysing test results. Internet of Things (IoT) technology, based on a microcontroller, can implement an automatic switch for controlling and operating electronic devices remotely online and in real time via mobile (cellphone). The use of a microcontroller will be configured to connect to the Ubidots application.
Pengaruh Porositas pada Perubahan Tekanan Campuran Gas CO₂ dan O₂ Terhadap Batuan Slag Nikel Zulfikri; Dan Mugisidi
Prosiding Seminar Nasional Teknoka Vol 10 (2025): Proceeding of TEKNOKA National Seminar - 10
Publisher : Fakultas Teknik, Universitas Muhammadiyah Prof. Dr. Hamka, Jakarta

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Abstract

Porosity in solid materials plays a crucial role in controlling gas pressure behavior and diffusion, particularly in carbon absorption processes within Carbon Capture and Storage (CCS) systems. This study aims to investigate the effect of porosity variations on pressure changes of CO₂–O₂ gas mixtures in nickel slag rocks as potential carbon-absorbing materials. The research method employed a literature review based on various studies discussing the physicochemical characteristics of nickel slag, carbonation mechanisms, and gas interactions within porous structures. Key parameters analyzed include pore size distribution, channel connectivity, and diffusion rate affecting pressure dynamics during gas–solid reactions. The results indicate that highly porous nickel slag experiences a faster pressure drop due to more intensive carbonation reactions, whereas low porosity limits gas transport and slows the process. In conclusion, porosity is a dominant factor governing pressure dynamics and the efficiency of CO₂ capture in nickel slag materials.
Pengembangan Komposit Berbahan Dasar Glycerin Pitch untuk Pembuatan BioPlafon Ramah Lingkungan Fadlin Qisthi Nasution; M. Ansori Nasution; Meta Rivani; Mhd. Erlangga Habibi Nasution; Rivaldy Yustianto Pasaribu; Arjanggi Nasution; M. Anshari
Prosiding Seminar Nasional Teknoka Vol 10 (2025): Proceeding of TEKNOKA National Seminar - 10
Publisher : Fakultas Teknik, Universitas Muhammadiyah Prof. Dr. Hamka, Jakarta

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Abstract

The development and mechanical performance of sand–fly ash composites utilizing glycerin pitch, a biodiesel residue, as a bio-based binder were investigated. Experimental variables included glycerin pitch concentration (10–25% v/v), sand-to-fly ash ratio (35:65–65:35), curing temperature (190–350°C), and curing time (4–24 h). The optimal flexural strength of 1.82 MPa was obtained with 15% v/v glycerin pitch, a 42:58 sand-to-fly ash ratio,  and curing at 190°C for 24 hours. Binder concentrations exceeding 15% or curing temperatures above 250°C resulted in disintegration or carbonization, indicating binder degradation. The produced composite demonstrated adequate strength and stability for non-load-bearing applications, including sustainable ceiling panels and interior partitions. These results demonstrate the potential of glycerin pitch as a renewable binder for transforming industrial residues into eco-efficient building materials and advancing circular economy practices in construction.
Pengaruh Partisi Antar Layer Butiran Terhadap Gas CO₂ Pada Batuan Slag Nikel Amanda Setiawan; Dan Mugisidi
Prosiding Seminar Nasional Teknoka Vol 10 (2025): Proceeding of TEKNOKA National Seminar - 10
Publisher : Fakultas Teknik, Universitas Muhammadiyah Prof. Dr. Hamka, Jakarta

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Abstract

The absorption of CO₂ gas by solid materials is an important approach in the development of Carbon Capture and Storage (CCS) technology. Nickel slag, as a solid waste product of nickel smelting, has the potential to be used as a carbon absorbent material as well as a construction material. This study analyzes the effect of inter-particle layer partitions in nickel slag on CO₂ absorption and its implications for slag utilization. The method used is a literature review of journal articles and proceedings discussing the physicochemical properties of nickel slag, types of partitions, diffusion pathways, and carbonation performance. The results of the study show that the presence of solid-solid, solid-liquid, pore/crack, and chemical partitions expands the specific surface area, provides active reaction sites, and forms effective diffusion pathways, thereby increasing the capacity and rate of CO₂ absorption. Engineering the morphology of partitions through mechanochemical activation or chemical treatment is an important strategy for optimizing the function of nickel slag in supporting the application of CCS and the circular economy of industry.

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