ABSTRACT Recovery boiler is a piece of equipment used in the pulp and paper industry that has two functions: recovering chemicals contained in black liquor for reuse in the cooking process and generating energy. Several components of a recovery boiler are very important for improving energy efficiency, one of which is a direct heater. The direct heater in a recovery boiler is used to heat blac…
ABSTRACT Magnesium sulfate (MgSO₄) has been proposed as an effective and economical alternative to chelating agents such as DTPA (Diethylene Triamine Pentaacetic Acid) in bleaching processes, particularly in the hydrogen peroxide (H₂O₂) bleaching method. MgSO₄ serves as a source of magnesium ions (Mg²⁺), which can compete with catalytic metal ions to bind to H₂O₂ or fiber surfac…
ABSTRACT The Multiple Effect Evaporator (MEE) is a critical unit within the Recovery boiler system in the pulp and paper industry, functioning to concentrate black liquor before combustion for energy and chemical Recovery. This study aims to analyze the Steam Economy value in the evaporator unit at PT Tanjungenim Lestari Pulp and Paper to evaluate the efficiency of steam energy utilization. Th…
ABSTRACT The baling line is the final stage of the process in the Pulp Dryer. At this stage, bales are packed into 1 unit with a weight of 2020 ± 9kg per unit and a height of 168 cm – 170 cm. The baling line often experiences downtime, which results in lost production time. This observation was conducted with the aim of minimizing downtime of the tying machine in the baling line of Pulp Dry…
ABSTRACT Filters are important components in oxygen production systems, especially in the pulp and paper industry, because they play a role in maintaining gas purity and the stability of the production process. This study aims to analyze the efficiency of primary and secondary filter usage and the effect of differential pressure on oxygen production capacity, by considering maximum capacit…
ABSTRACT One of the important parameters in the cooking process is the liquor to wood ratio (L/W ratio) which is the ratio between the volume of cooking liquid and the mass of wood used. An imbalance in the material balance in the impbin & digester unit can cause problems such as excess chemical liquor for the cooking process, chips that do not cook evenly. In this research, the focus is o…
ABSTRACT The cut-size machine is a tool used to produce standard paper commonly used in everyday document printing. However, in the production process, there are still defects that result in poor paper quality and do not meet the specified quality specifications. Therefore, this study entitled "Defect Analysis on Cut-size Machine A and Cut-size Machine B with Quality Control Method" aims t…
ABSTRACT The Folio Sheeter (FS) machine functions to change paper rolls into folio-sized sheets of paper. This final project report discusses efforts to "Minimize Folio Paper Defects Using the Statistical Quality Control (SQC) Method on Folio Sheeter A (FS A) and Folio Sheeter B (FS B) Machines". The purpose of this study is to identify the types of defects in paper products, apply SQC to …
ABSTRACT Electrolysis is an event where a solution will be decomposed into its ions, namely positive ions (cations) and negative ions (anions), when a direct electric current is flowed into an electrolyte solution through electrodes. In the electrolysis process, electrical energy (Power) is needed so that the electrolysis process takes place. The electrolysis process in the chlor-alkali indust…
ABSTRACT Electrolysis is the main process in the alkaline chlorine industry. Electrolysis is a method of separating compound bonds by passing an electric current through compound bonds. This study aims to analyze the effect of load variation in chlor alkaline electrolyzer on the performance of the electrolysis process in producing caustic soda (NaOH) and chlorine (Cl₂) in the pulp and paper …
ABSTRACT Pulp Dryer is part of the final process in pulp processing which aims to convert slush pulp into pulp sheet with the help of steam. To reduce steam consumption, it is necessary to analyze several factors that affect steam consumption. In this final project, the influence of temperature, pH and slush pulp freeness factors on steam consumption in the Pulp Dryer is studied. Some of the f…
ABSTRACT The process of chip filling into the digester is a crucial early stage in the pulp production process as it determines impregnation efficiency and delignification success, especially to produce high quality dissolving pulp. Optimizing chip load not only improves cooking efficiency but also directly influences mill productivity allowing a higher daily throughput of dry pulp per batch a…
ABSTRACT The woodyard department is a sector dedicated to the preparation of raw chip materials, starting from the arrangement of wood blocks, sorting the quality of logs or raw materials before the chipping process, sorting the size of the chips, and processing waste materials that have value such as processing unwanted bark in the pulping process into boiler fuel after going through several …
ABSTRACT Bleaching is an important step in the kraft pulp production process, as it plays a direct role in increasing brightness. Measuring brightness, strength and other characteristics is important to ensure that the pulp meets the desired standards. In this study, the focus is on the D1 stage of the bleaching process, which uses the active ingredient chlorine dioxide (ClO₂), with the aim …
ABSTRACT Recovery Boiler is an equipment in the pulp and paper industry that has two main functions, producing steam from the heat energy when burning the organic elements of black liquor and recovering the chemicals from black liquor (especially sodium elements) to be used again in the pulp cooking process. One of the main component in Recovery Boiler is the Combustion Air system which supp…
ABSTRACT ClO2 is an industry that produces chemicals in the form of chlorine dioxide (ClO2). One of the supporting materials for making ClO2 is sodium chlorate using the electrolysis method. The concentration of liquor and residual HCl needs to be maintained to produce quality sodium chlorate by maintaining the temperature of the weak chlorate heater. Temperature changes at this stage can …
ABSTRACT This study aims to compare the process parameters and pulp quality of normal kraft pulp (a blend of Acacia and Eucalyptus) and customized kraft pulp (100% Acacia) at specific production rates. The parameters analyzed include AA charge, H-Factor, tensile strength (in unbeaten condition), and the consumption of bleaching chemicals, specifically chlorine dioxide (ClO₂) and hydrogen per…
ABSTRACT Flocculation is an important stage in wastewater treatment, where fine particles are combined into larger flocs for easy settling. This study aims to analyze the effect of variations in speed and stirring time on the effectiveness of the flocculation process in pulp and paper industry waste samples. In this study, testing was carried out using the jar test method using variations in s…
ABSTRACT Dissolving pulp is a pulp that has a higher quality than pulp in general. One of the features of dissolving pulp is that it has an alpha cellulose value of at least 94% (SNI 938: 2017 - Pulp Rayon). While the kraft pulp Eucalyptus pellita made by pulp machine also comprises 92% alpha cellulose. Therefore, this study was conducted to analyze the results of the dissolving pulp manuf…
ABSTRACT The dechlorination process in the brine tank is a process to remove the remaining chlorine dissolved in the weak brine solution using sulfur dioxide (SO2) as a reductant. SO2 solution is a solution formed when sulfur dioxide gas (SO₂) dissolves in water (H₂O), colorless with a pungent odor. Concentration is the amount of a solute in a homogeneous mixture (solution). The methods us…