ABSTRACT This study analyzes meteorological drought on peatlands in Bengkalis Island using the Standardized Precipitation Index (SPI). Rainfall data from the Global Precipitation Measurement (GPM) satellite for the 2015–2024 period were processed through two approaches: manual calculation based on the Gamma distribution using Microsoft Excel and automated computation with Google Earth E…
ABSTRACT The roasting machine is an important tool in the process of cooking spices, functioning as a frying tool without oil to reduce water content and enhance flavor. Quality Function Deployment (QFD) is a systematic method used to identify and meet customer needs by integrating the voice of the customer into the product design and development process. The application of QFD in the developm…
ABSTRACT This research aims to analyze the corrosion rate and the efficiency of bay leaf (Eugenia Polyantha L) extract as an inhibitor at concentrations of 0%, 3%, 6%, and 9% on ST-37 steel in a peat water medium. The bay leaf extract was prepared using a maceration method, and the solvent was separated using a rotary evaporator. ST-37 steel specimens, measuring 10 mm × 10 mm × 3 mm, were im…
ABSTRACT The automotive industry sector currently requires materials that have strong and lightweight properties such as composite materials. Composites are the result of combining two or more materials macroscopically which aims to produce materials with superior properties. Therefore, the use of oil palm frond fiber as a composite reinforcement is an environmentally friendly alternative to r…
ABSTRACT Riau Province is one of Indonesia’s main producers of pineapple and coconut, with annual production reaching hundreds of thousands of tons. Processing these commodities generates large amounts of waste in the form of pineapple peel and coconut pulp, which, if not managed properly, can potentially cause environmental pollution. One promising solution is bioconversion using Black …
ABSTRACT The Tangkerang River flows through source areas such as markets, settlements, hospitals, and hotels, which contribute wastewater that poses risks if discharged directly into the water body without prior treatment. This study aims to assess pollutant loads and carrying capacity using the Qual2Kw and WASP (Water Quality Analysis Simulation Program) models. The Qual2Kw model was appl…
ABSTRACT Diphenyl Carbonate (DPC) is a carbonate ester compound with the chemical formula (C6H5O)2CO which plays a role in the manufacture of Polycarbonate (PC) resin. DPC is used in the synthesis of organic compounds, polymers, solvents, and plasticizers. DPC is an important and non-toxic raw material in the PC industry. The PC production process, which generally involves hazardous and toxic …
ABSTRACT The plant is planned to be located in Pauh Ranap Village, Peranap Subdistrict, Indragiri Hulu Regency, Riau Province. Coal will serve as the raw material for DME production through a gasification process to produce syngas, which will then be synthesized into methanol. The methanol will then undergo dehydration to produce the final DME product. DME is targeted to be an additive or subs…
ABSTRACT The acrolein plant is designed with a production capacity of 30,000 tons/year. The raw materials used are propylene and oxygen, aided by the α-Bi₂Mo₃O₁₂ catalyst through the propylene oxidation reaction. The propylene oxidation reaction produces acrolein (C₃H₄O) and by-products such as acrylic acid (C₃H₄O₂), carbon dioxide (CO₂), and water (H₂O). Indonesia's ave…
ABSTRACT Diphenyl carbonate (DPC) is synthesized with the raw materials of methanol, oxygen, and carbon monoxide to synthesize dimethyl carbonate (DMC), and then DMC is reacted with phenol to synthesize DPC. The plant is planned to be built in Dumai City, Riau, Indonesia. Dumai City was chosen to facilitate access to fulfilment of raw materials such as methanol, carbon monoxide and phenol. The…
ABSTRACT Photovoltaic (PV) solar panels are an efficient renewable energy source, yet their performance is often affected by input-side voltage ripple at the boost converter, which degrades power-conversion efficiency and system stability. This study designs and evaluates ripple mitigation using a bank of 10,000-μF electrolytic capacitors that can be selectively engaged (10k/20k/30k μF) via …
ABSTRACT Optimizing energy utilization from Solar Power Plants (PLTS) is increasingly essential to enhance the efficiency and stability of the generated power. This research focuses on the development and implementation of a Fuzzy Logic Controller (FLC) for Maximum Power Point Tracking (MPPT) in PLTS. The FLC is employed to optimize the output power of the PLTS while minimizing overshoot and r…
ABSTRACT Generator sets (gensets) are one of the main sources for generating electrical energy, especially in areas not yet covered by the main electricity grid. Optimal generator set performance depends heavily on the stability and balance of its components. This research aims to design and manufacture generator set supporting components that can improve operational stability, energy efficien…
ABSTRACT Heavy metal pollution such as lead (Pb²⁺) in industrial waste is a serious environmental problem because it is hazardous and toxic which can disrupt human health and ecosystems. This study aims to determine the effect of temperature and adsorption time on the adsorption capacity and effectiveness of lead ion adsorption using activated charcoal adsorbent from corn cobs that have bee…
ABSTRACT Heavy metal pollution such as lead (Pb²⁺) in industrial waste is a serious environmental problem because it is hazardous and toxic which can disrupt human health and ecosystems. This study aims to determine the effect of temperature and adsorption time on the adsorption capacity and effectiveness of lead ion adsorption using activated charcoal adsorbent from corn cobs that have bee…
ABSTRACT ECF (Elemental Chlorine Free) bleaching is a pulp bleaching method that does not use elemental chlorine (Cl₂) directly, but instead utilizes chlorine oxide (ClO₂)-based compounds as the primary agent. This technology was developed to reduce the formation of harmful organochlorine compounds such as dioxins, making it more environmentally friendly than conventional elemental chlorin…
ABSTRACT The proposed construction of a propylene oxide (PO) plant with a capacity of 25,000 tons per year will be carried out in Bontang Utara District, Bontang City, East Kalimantan. The location was chosen due to its proximity to raw material sources and the availability of supporting infrastructure such as ports, distribution networks, energy supply, and industrial water. Domestic demand f…
ABSTRACT The demand for acetic acid in Indonesia continues to rise in line with the growth of downstream industries, while domestic production capacity remains limited, making supply still dependent on imports. Import volume has grown at an average rate of 7.5% per year. This condition underlies the need for the establishment of a domestic acetic acid plant. The Bontang Industrial Estate, East…
ABSTRACT Ethylene is one of the main petrochemical feedstocks with a wide range of industrial applications, including as a raw material for plastics, textiles, polyester fibers, detergents, and various other chemical products. The demand for ethylene in Indonesia continues to increase, while domestic production capacity remains limited at around 900 thousand tons per year. This condition for…
ABSTRACT Tracer study is a key instrument for higher education institutions to evaluate graduates’ success in the labor market and the relevance of competencies learned during their studies. This research implements a web-based alumni distribution system integrated with Geographic Information System (GIS) in the Informatics Engineering Study Program at Universitas Riau. The proposed solution…