Abstract At this time the development of the combustion engine is moving towards an environmentally friendly combustion engine which emphasizes the use of lower costs. This is due to the depletion of fossil fuel supplies available in the world. Based on this thought, the developer of a combustion engine that uses fuel that is low in cost and relatively harmless to the environment is carried ou…
Abstract At this time the development of the combustion engine is moving towards an environmentally friendly combustion engine which emphasizes the use of lower costs. This is due to the depletion of fossil fuel supplies available in the world. Based on this thought, the developer of a combustion engine that uses fuel that is low in cost and relatively harmless to the environment is carried ou…
ABSTRACT Increasing production and productivity of sugar cane indicates that more bagasse waste will be discharged into the environment. Bagasse is known to contain around 37.65% cellulose which can be utilized as a basic ingredient for various high-value chemical products. This study aims to separate cellulose from bagasse. Separation and purification of cellulose was carried out semi-mechani…
ABSTRACT Used cooking oil is frying oil that contains carcinogenic compounds such as free fatty acids, peroxides and others. To utilize used cooking oil, researchers are interested in recycling used cooking oil by carrying out a purification process using wood charcoal powder as an adsorbent. After the purification process, the oil is used to make liquid bath soap. This study investigates the …
ABSTRACT Stirrer speed is one of the factors that influence the process of making soap. The manufacture of liquid dish soap with the addition of sweet orange peel waste extract has been carried out. This study aims to determine the effect of stirrer speed on the manufacture of dishwashing liquid soap and determine the characteristics of liquid dishwashing soap. This research began with the…
ABSTRACT Stirrer speed is one of the factors that influence the process of making soap. The manufacture of liquid dish soap with the addition of sweet orange peel waste extract has been carried out. This study aims to determine the effect of stirrer speed on the manufacture of dishwashing liquid soap and determine the characteristics of liquid dishwashing soap. This research began with the…
ABSTRACT Used cooking oil is frying oil that contains carcinogenic compounds such as free fatty acids, peroxides and others. To utilize used cooking oil, researchers are interested in recycling used cooking oil by carrying out a purification process using wood charcoal powder as an adsorbent. After the purification process, the oil is used to make liquid bath soap. This study investigates the …
ABSTRACT Cellulose (C6H10O5)n is one of the long-chain polymers of polysaccharides prepared from saw-monomer β -glucose. Cellulose is the principal carbohydrate synthesized by plants and occupies almost 60% of the components of plant structure. The purpose of this study is to extract cellulose from the pineapple wastes semi-mechanical and obtain cellulose powder by the methods of delignificat…
Abstract Bread is a food product made from wheat flour mixed with bread yeast. The use of instant yeast is known to be practical and easy to obtain, but yeast intolerance is not uncommon. The use of natural yeast can be used as an alternative to overcome this problem. Natural yeast is one of the oldest biotechnology products that comes from mixing flour and fermented water containing lactic ac…
ABSTRACT Water and soil are generally susceptible to environmental pollution, one of the causes of pollution is the iron compound Fe2+. If the concentration of dissolved iron in the water exceeds the limit, it will cause problems such as pipes becoming corrosive. Fe metal contamination can be handled by the adsorption process using activated charcoal as an adsorbent. Cocoa rind contains high e…
ABSTRACT Water and soil are generally susceptible to environmental pollution, one of the causes of pollution is the iron compound Fe2+. If the concentration of dissolved iron in the water exceeds the limit, it will cause problems such as pipes becoming corrosive. Fe metal contamination can be handled by the adsorption process using activated charcoal as an adsorbent. Cocoa rind contains high e…
ABSTRACT Eucalyptus leaf is one of the essential oil-producing ingredients. The purpose of this study was to study the effect of sample conditions (fresh leaves and dried leaves), whole leaves and chopped leaves, as well as the extraction time on the yield of essential oils extracted from hybrid eucalyptus leaves using the microwave hydrodistillation and gravity (MHG) method. The essential oil…
ABSTRACT Iron metal (Fe) is one of the heavy metals polluting waters originating from industrial waste. Fe metal contamination can be overcome by adsorption method using activated charcoal as adsorbent. The activated charcoal used is made from kepok banana peels, because kepok banana peels contain lignin, cellulose, and hemicellulose as carbon forming so that kepok banana peels can be used as …
ABSTRACT Iron metal (Fe) is one of the heavy metals polluting waters originating from industrial waste. Fe metal contamination can be overcome by adsorption method using activated charcoal as adsorbent. The activated charcoal used is made from kepok banana peels, because kepok banana peels contain lignin, cellulose, and hemicellulose as carbon forming so that kepok banana peels can be used as …
ABSTRACT The Rokan Kiri sub-watershed station AWLR (Automatic Water Level Recorder) of Lubuk Bendahara has experienced the development of land use from forests to plantations, agriculture and settlements. Changes in land use can result in floods and cause water availability to decrease every year. The decrease in water availability is due to the ability of the sub-watershed to respond to falli…
ABSTRACT Areca nut is one type of plant that has many benefits for the community. In addition to being sold to collectors, areca nut can be processed into various types of food and drinks so that the benefits contained in areca nut can be felt by many people. One of the areas in Riau Province which is a producer of areca nut is Tembilahan Regency, especially in Keritang District, but in the pr…
ABSTRACK Excavator is a heavy equipment used to move material from one place to another. Excavators are widely used in various fields, namely: construction, mining, infrastructure and so on. Riau University has produced a mini excavator model design at the Hydraulic and Pneumatic Laboratory of Mechanical Engineering, Faculty of Engineering using a pneumatic system based on a traveling unit (un…
ABSTRACT Basically, people still use cooking oil repeatedly and the draining of cooking oil is not optimal. So that many people consume processed foods from frying that still contain or leave oil in the food. The purpose of this study was to analyze the Spinner model using the Analytical Hierarchy Process (AHP) method. AHP makes broad and unstructured problems into a flexible and easy-to-under…
ABSTRACT Friction welding is a method of joining materials caused by friction between two materials which utilizes the heat of friction between the two materials, the same or different. This study aims to determine the effect of rotational speed on dissimilar materials on the weld area and hardness values. There are various methods to overcome problems in the process of joining the material, i…
ABSTRACT One of the materials that is widely used in industrial products is mild steel AISI 1037, but the connection of mild steel has problems using the liquid welding method, so the friction welding method is used. The friction welding used is vertical bar-plate Rotary friction welding, which is the design of Utamar, F. and Siswanto (2014), when testing all specimens, the parameter variation…