ABSTRACT The Nilo Bridge construction project has a main bridge length of 300 meters and an approach bridge of 275 meters while the width of the bridge is 9 meters with the A60 steel frame bridge type. This bridge work was built right next to the main bridge. This bridge is expected to improve connectivity and expedite the distribution of goods and services from Riau Province to Jambi Province…
ABSTRAK Peat water is one of the polluted waters which is characterized by a high content of heavy metals, and has a value of Total Suspended Solid (TSS), Total Dissolve Solid (TDS), Electrical Conductivity (DHL), Biological Oxygen Demand (BOD), Chemical Oxygen Demand ( COD) is high, the color is blackish brown, the pH value is low so it is not suitable for use for community needs. Peat water …
ABSTRACT Large-scale civil engineering work needs to use heavy equipment. According to their respective functions, heavy equipment includes, loaders, carriers, spreaders, and compactors. Tools must be used efficiently so that users need to know the capabilities of the tools, the types of tools, the limitations of the tools, as well as the operational costs of the tools. Productivity of heavy e…
ABSTRACT Peat swamp is an organic soil environment with high water content, low carrying capacity and high degree of acidity. In the Siak Regency area, the soil structure generally consists of red-yellow podzolic soil made of rock and alluvial and peat soil or swamps. Siak Regency has the potential for surface water originating from the tributaries that flow in each DAS which can be used as a …
ABSTRACT Concrete is a mixture consisting of portland cement, fine aggregate, coarse aggregate and water. With increasing age, the concrete will harden and will reach the design strength (fc') at the age of 28 days. This study aims to determine the effect of diameter and specimen ratio on the compressive strength of concrete with a compressive strength value of fc' 15 MPa. Concrete compressive …
ABSTRACT Sago is a plant originating from southeast Asia, sago is commonly found in swamps of lowland and tropical freshwater forests. The area of land for sago plants in Indonesia is 1.12 million ha or 50% of the total land area for sago plants in the world. Sago plants are used by most people in eastern Indonesia, such as Papua, as staple food. In addition, sago palms have social, economic a…
ABSTRACT Pectin was a complex polysaccharide derivative compound that was abundant in vegetables and fruits, including oranges, apples, bananas, carrots, nuts, and garlic. Pectin had the ability to form a gel, making it crucial in the production of various food products such as jam, jelly, fruit preparations for yogurt, fruit juice, and other products. The objective of this study was to determ…
ABSTRACT Pectin was a complex polysaccharide derivative compound that was abundant in vegetables and fruits, including oranges, apples, bananas, carrots, nuts, and garlic. Pectin had the ability to form a gel, making it crucial in the production of various food products such as jam, jelly, fruit preparations for yogurt, fruit juice, and other products. The objective of this study was to determ…
ABSTRACT Liquid smoke is a condensed liquid derived from heating biomass without oxygen. The objective of this research was to compare the characteristics of the obtained liquid smoke with the quality standard of liquid smoke according to SNI 8985-2021, study the effect of different concentrations of liquid smoke on the preservation time of the product, and apply liquid smoke as a preservative…
ABSTRACT Liquid smoke is a condensed liquid derived from heating biomass without oxygen. The objective of this research was to compare the characteristics of the obtained liquid smoke with the quality standard of liquid smoke according to SNI 8985-2021, study the effect of different concentrations of liquid smoke on the preservation time of the product, and apply liquid smoke as a preservative…
ABSTRACT Kraft Pulping uses active chemicals to separate cellulose and hemicellulose from lignin and extractive substances. Sodium Hydroxide (NaOH) and Sodium Sulfide (Na2S) are the main ingredients in White Liquor which play a role in degrading lignin. The amount of ratio between liquor to raw materials must be known so that lignin can be completely dissolved in the cooking liquid. Kappa Numb…
ABSTRACT Oxygen Plant is a plant that produces oxygen and nitrogen using free air as its raw material. The oxygen gas that will be compressed by the oxygen compressor is obtained from the upper column coldbox with a temperature of 29℃ - 32℃ with a pressure of 0.29 barg then the temperature and pressure will increase, where the pressure is directly proportional to the temperature. The oxyge…
ABSTRACT Effluent Treatment Plant is one of the areas in PT. RAPP is responsible for processing liquid waste which will flow into the Kampar River and sludge which will be distributed to Power Boilers as fuel. The most common sludge treatment system and has been widely used is the Sludge handling Process. This process uses a Flocculation Tank to form flocs by adding polymer to the flocuation b…
ABSTRACT Brine filter is an important component in the brine solution purification process. Brine filters are used to filter the solid particles contained in the brine solution and hold them on the cloth and will accumulate to form cakes. The accumulation of these solid particles will increase the pressure drop in the brine filter and under certain circumstances must be washed. This research w…
ABSTRACT The washing stage is a stage carried out in the pulp manufacturing industry to separate the cooked pulp from the black liquor content originating from the cooking stage in the digester. In the washing stage, there is one step that can reduce the kappa number value still contained in the pulp up to 40-50%, namely the delignification oxygen stage. Oxygen delignification uses oxygen and …
ABSTRACT Chlorate cell is one of the equipment used in the production of sodium chlorate, especially in Chlorine Dioxide Plant 1, Chlorine Dioxide Plant 2, and Chlorine Dioxide Plant 5. This Equipment is used to electrolyze salt into sodium chlorate, where sodium chlorate is needed to produce chlorine dioxide (ClO2) in ClO2 Plant. Using Chlorate cells for a certain period of time can result in…
ABSTRACT Soda losses was the amount of sodium that still in pulp out from system. This sodium come from white liquor that used as cooking liquor in digester plant. Sodium was one of active substance in white liquor soak into pulp to dissolve the other component in wood except cellulose in cooking stage. Sodium and other component that dissolved in cooking liquor will be wash at washing stage. …
ABSTRACT The compressor is a mechanical machine that functions to compress gas fluid or increase air pressure. In industry, the use of compressors is very important, either as a single instrument producing high pressure air or as an integral part of a machine. In compressors, there is a surging phenomenon that must be avoided, surging is an instability phenomenon that occurs when the flow rate…
ABSTRACT A Feeder In An Arduino Uno Based Chicken Coop is useful for maintaining feed using an automatic control system with Arduino Uno as the control. The tool is equipped with an Arduino Uno as a control centrel and receives signals from the RTC sensor, then gives commands to the servo motor according to the time that has been set from the time. When the time condition according to the sett…
ABSTRACT The permeability coefficient is a significant soil parameter in seepage calculations. Permeability is also related to the physical properties of the soil. Of the several soil physical properties, there is one soil physical property that has the most influence on the permeability coefficient. This can be determined by using artificial intelligence which is capable of imitating the huma…