Indonesia palm oil plantations have an area 15.08 million hectares in 2021 which provide huge potential of biomass from replanting waste including palm oil trunks. This study aims to determine the characteristics of palm oil trunks and its potential for co-firing fuel with coal in power plant. The palm...

Biomass co-firing is one of alternative way for Coal-Fired Power Plant (CFPP) to achieve green energy. Indonesia as the world’s largest producer of palm oil, has the chance to convert palm oil waste into a relatively sustainable biomass for use as co-firing fuel in CFPP. Biomass combustion, on the other...

Micro, Small, and Medium Enterprises (MSMEs) are essential for regional economic growth. In their operations, MSMEs often face technical constraints, one of which is the limited supply of electrical energy that can hamper production. Solar energy as renewable energy has great potential and is an alternative...

Briquettes are one of the alternative energies in the form of solid fuel consisting of powders of small pieces that are compacted and mixed with adhesive materials so that they become a solid form. This study aims to produce briquettes and look for the effectiveness and influence of the composition comparison...

3D printing technology based on the extrusion material method is rapid manufacturing and has complex accuracy, which supports industrial progress. The selection of printing material (filament) is essential in obtaining mechanical, chemical and thermal properties. In this study, the use of ABS and PLA...

Epoxy resin, which has a number of benefits, is one of the insulating polymers used in high voltage air insulation materials. However, environmental pollution has caused a degradation of the surface. Epoxy resin polymer isolation was the material utilized in this study, along with comparison values for...

Filler has the smallest percentage of asphalt pavement’s aggregate gradation but has a significant role. In addition, mineral filler stone dust, is very difficult to obtain. Therefore, there is a need to make an innovation by substituting filler with other materials, such as red brick powder. This study...

Coconut oil as a surfactant can be derived from renewable, cleaner, and purer resources than petrochemical-based raw materials. Therefore, this study was conducted to obtain the required criteria for forming a surfactant such as diethanolamide. During the analysis, diethanolamide surfactant was produced,...

This study aims to obtain a suitable tempering time for ductile cast iron on microstructure, hardness, and toughness. The investigated ductile cast iron Y-block contains a carbon content of 3.45 wt%, silicon 2.6 wt%, manganese 0.635 wt.%, chromium 0.275 wt.%, nickel 1.58 wt.%, molybdenum 0.177 wt.%,...

WC-Co is widely used as a hard metal tool tip for metal machining purposes. This study investigates the oxidation behavior of WC-Co tips from industrial waste products. The results of this study are also used as a consideration in the utilization of WC-Co tips waste as a reinforcing material for applications...

This study investigated the effect of austempering temperature on the microstructure and mechanical properties of austempered ductile iron (ADI). Samples for this experiment were taken from ductile cast iron Y-block. Then they were austenitized to a temperature of 900 ℃ in an induction furnace for 90 min....

High Voltage Transmission Tower is an important for distributing electrical energy in a large network. It is one of essential infrastructure in the modern life and should be maintained in high performance. In the event of earthquake, however, this structure may be damaged. This paper aims to evaluate...

The more outstanding palm oil production, the greater the waste production. One of them is the fiber of empty palm oil fruit bunches (EPOFB). The use of empty palm fiber bunches is still only in the agricultural sector. In other places, the development of natural fiber composite is currently being developed....

Technological developments cannot be separated from the use of energy to power electronic devices. An electronic device that acts as a store of electric charge (energy) is a capacitor. The capacitor component consists of 2 metal plates separated by a dielectric layer; each plate is given an electrode....

Preparation and characterization of adsorbent from oil palm empty fruit bunches (OPEFB) activated with KOH has been done. Adsorbent was made from carbonated at 100 °C of oil palm empty fruit bunches and activated by using potassium hydroxide (KOH). The experimental design used was a randomized block...

Polymers, such as plastics and coatings, are susceptible to photo degradation initiated by heat or Ultra Violet (UV) light during processing or long-term use. In preventing the photo degradation of polymers, the sustainable polymer composite (SPC) is doped with different percentage of Titanium Dioxide...

Composite ceramic membranes are very popular due to their high-temperature resistance, reliable mechanical strength, resistance to acid/alkaline conditions, abrasive resistance, and long-term stability. As a filter, density and porosity are things that must be considered. Therefore, the construction...

This study uses a 3-D, isothermal numerical model with isotropic gas diffusion layer (GDL) property to examine how thermal contact resistance (TCR) and porous medium thickness (PMT) between GDL and BP, channel, and various heat transfer coefficients affect the temperature profile and performance of a...

Thermoelectric material can convert waste heat from the combustion gas into electrical energy. The objective of this work was to study the effect of fan power on the electrical output of a thermoelectric generator used in the combustion of wood charcoal. The side wall of the combustion stove has thermoelectric...

Tapered flow field configurations (FFCs) improve oxygen transport, water removal, and proton exchange membrane fuel cell performance. A three-dimensional multi-phase fuel cell model is used to quantify how the tapered FFC affects the internal physicochemical process and cell performance. The tapered...

Aeration is a common process in increasing Dissolved Oxygen content in water. A common method for aeration is using large size bubbles which are commonly in the size of 4–10 mm. The simulation is intended to investigate the effect of bubble size (diameter) in oxygen transfer rate, gas hold up and increase...

Propane with lower carbon content than other fossil fuels and which is easily vaporized at ambient conditions has the advantage of lowering CO2 emissions and optimizing the combustion process. The possible combination of using it in high-efficiency compression ignition engines makes it worth analyzing...

Wear is phenomenon of material loss that arises because of interaction of solid surfaces which mechanically loaded and in relative motion. Understanding wear phenomenon is important in teaching and learning process for subjects related to engineering materials. A tribometer is a typical tool utilized...

Emission-free electric vehicles have been well accepted as an environmentally friendly vehicle nowadays. Electric buses are considered as potential future mass transit vehicles that have special advantages to the environment compared to conventional internal combustion engine buses. Indonesia has issued...

Nowadays, the Indonesian government is actively building coal-fired power plants and one of the new power plant projects is in Gorontalo. The reliability of the PLTU Gorontalo was designed to have a Net Plant Heat Rate of 3068 kcal/kWh which can be reached using coal fuel quality above 4200 kcal/kg....

Global demand for industrial lubricants is increasing every year in line with the increasing of production and demand of various products. Castor oil has been acknowledged as one of vegetable oil base lubricant source that has advantages over mineral based lubricants due to their renewability properties....

Application of castor oil as an alternative lubricant already knowledge since years ago due to its good lubricating characteristics. Most lubricant formulation are made of base oil and addtives. Molybdenum-Dithiocarbamates (MoDTC) and ZincDialkyl- dithiophosphates (ZDDP) are well-known additives for...

The use of motorbikes is increasing daily, making these products common on the streets. This is for some people to be boredom. It prompted some riders to modify their motorbikes to make it look different. The exhaust cover is one of the most visible parts of the motorbike. This can provide significant...

This study presents a literature review and a comparison of selected body dimensions included in many anthropometric surveys. The main purpose of this study is to determine the measurements and variables that need to be included in a study of anthropometry for agricultural workers in Madura Island, Indonesia....

The local made CNC machine is already available by utilization of CNC router technology, but this machine is not suitable to be used for educational purposes because the construction and movements are not similar to the real CNC machine, therefore the Mechanical Engineering Department UM Sumbar. This...

3D printing technology is one of the key technologies to support the rise of the 4th Industrial Revolution. The use of FDM 3D printers is growing fast since the Open-sourced RepRap FDM 3D printer was introduced. Unlike European countries that already introduce this technology to children (early-age students),...

The water in the oil causes a hydrolysis process that produces free fatty acids and causes a rancid odor on the shredded. Therefore, shredded fish can be appropriately drained. The conventional draining process is challenging to minimize the oil content in the shredded. The draining stage is essential...

Based on Government Regulation of Indonesia no. 50 of 2012, every company has to implement OSH management system. XYZ University, as a university with lots of students, lecturers, and staffs, also needs to implement OSH management. OSHE organizations show the implementation of OSHE management at XYZ...

Estimate activity duration, is a process in Project Schedule Management whose output will be Input to develop schedule process. The accuracy of the estimated duration of the activity is an important point in accuracy of the project schedule in general. Case study on production facility PT. ABC, pump...

The number of motorcycles in Indonesia continues to grow. However, the low use of helmets phenomenon is still occurring, so it can be one of the accident triggers, with an average of 3 people dying daily. SNI helmets are important, but today’s helmet specifications still do not meet user needs. Therefore,...

The object of this research is the profile of the wheels of the 50 tons capacity coal transport train, the Babaranjang Train, which is operated by PT Kereta Api Indonesia (Persero), or PT KAI, in South Sumatra, Indonesia. The Babaranjang Train uses a wheel called as Roda Golongan DD, with a slope profile...

A good quality of soap must be able to prevent the spread of pathogenic bacteria on the skin; therefore, it is necessary to add anti-bacterial ingredients such as lemongrass essential oil and tannins. The aim of this study is to produce liquid soap from castor oil and VCO with the addition of lemongrass...

Technological advancement affects a country’s social, political, and transportation development. Operating system, facilities, and infrastructure all use modern bus technology. Therefore, valid data about bus passengers is needed to optimize facilities and passenger numbers. This research involves developing...

Planning and budgeting in regional development are two things that are interrelated and must be balanced. Planning and budgeting are integrated processes; therefore, the output of planning is budgeting. This study aims to determine the effect of the budget refocusing policy due to the covid pandemic...

The port of Kuala Bubon, as the maritime axis of the west-south part of Aceh, is one of the crossing ports to connect community activities in West Aceh Regency and its surroundings to Simeuleu Island. Every year, both the demand for goods and passenger departures are increasing every year. Currently,...

The Berambai is one of the areas in Samarinda, East Kalimantan, which has a tourism potential related to geological uniqueness and landscapes. The research aims to identify geomorphological and geological diversity, to determine the distribution of geotourism potential, and to identify potential environmental...

Roads have a very important role in advancing national development, structures made of concrete are very susceptible to cracking due to the brittle nature of the material and the nature of concrete that is strong against pressure, but weak against pulling. And the utilization of waste material as substitution...

Tiny machine learning (TinyML) is an important and growing field, but academic research related to the term is still at a very early stage at this time. As a result, efforts to synthesize TinyML research into broad knowledge integration are relatively limited. Therefore, the development of tinyML in...

One indicator of economic performance to make a developing country into a developed country is infrastructure. The development of infrastructure to support economic activities in Indonesia is very necessary. However, more government funds have resulted in the construction of new road networks needing...

Limited costs are the main issues in road handling, as well as delays in maintenance, inefficient allocation of costs and problems related to implementation are the causes of road damage. The purpose of this study was to determine the comparison of the cost of improvement and maintaining, especially...

The increasing of people population and vehicle number in big city has caused lack of parking space. This condition has forced the architects to design some parking spaces in form of parking building i.e., underground parking garage. However, an underground a parking garage is having higher risk to the...

The most important objective in electrical utility operation and control is to improve voltage quality in industrial power grids. Due to the use of electronic devices in the form of non-linear load, the system will get affected with harmonics. Harmonic has become the main issue for power quality, and...

In the turning process, the force is a constraint factor that must be considered because a large cutting force will generally result in a high surface roughness value. Therefore, selecting suitable parameters for the turning process is necessary to minimize surface roughness (SR), cutting force (Fc),...

During the drilling process with minimum quantity lubrication (MQL) for AISI 1045, the thrust force and torque influence the drilled hole’s surface quality. Therefore, it is important to select the appropriate combination levels of machining parameters in order to minimize the thrust force, torque, and...

An experiment was carried out in the face milling process of AISI 1045 material to determine the levels of the process parameters that could minimize cutting force (CF) and surface roughness (SR) and also maximize material removal rate (MRR) simultaneously. A Taguchi orthogonal array L9 was selected...

Laboratory wastewater in PT. Indo Sea Food is a type of waste generated from various laboratory activities consisting of the results or residue of chemical reactions, effects of washing equipment, and consumables from actions that have taken place. The use of chemicals during the activities carried out...

The Risk-Based Inspection (RBI) is a component of the whole asset integrity management. The RBI procedures grant a reasonable base for inspection of projects and efficient tools to support the operation. This study aims to overview the performance aspects of RBI from the perspective of offshore structures....

Palm sugar yogurt is a product of fermented milk with palm sugar in the form of a thick to semi-solid liquid with a specific sour taste. The making of this yogurt utilizes palm sugar to help form a texture and give a sweet taste to yogurt, which is acidic. This research aims to determine the effect of...

Follow up on the collaboration between the Research Center for Appropriate Technology National Research and Innovation Agency with PT. Bukit Dewi Manggung, a study of the potential of micro hydro, was carried out in Rancamanggung village, Tanjung Siang sub-district, Subang district. Activities consisted...

Design and build contracts are contracts that are currently being widely used in government projects. Stadium project work is one type of project that uses design and build. However, in the implementation of design and build projects, many disputes often occur. This dispute occurs because there are many...

The construction of the Trans-Sumatra Toll Road is estimated to cost up to IDR 476 trillion. The delay in the construction of the project is considered to be detrimental to state finances worth IDR 3 trillion per year. This figure is compiled from various sources by assuming a total increase of 10–12%...

The development of Polyamide-Al2O3 nanocomposite membranes into a solution for treating oil and gas wastewater into clean water that can be flowed back into the sea or reused as a source of clean water using simple operations, without additives, cost-effective, and has high productivity. Polyamide–Al2O3...