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All Journal CHEESA: Chemical Engineering Research Articles Nucleus Journal
Khairunisa Betariani
Politeknik Industri Petrokimia Banten
Chemical Engineering, Chemistry & Bioengineering Chemistry

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Fluid Flow Rates Regression in Tank Level Control Puji Rahayu; Khairunisa Betariani; Rachmadi Tutuka; Ari Adrianto; Nurmalasari
CHEESA: Chemical Engineering Research Articles Vol. 8 No. 1 (2025)
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v8i1.21400.35-42

Abstract

The industrial production process is closely related to control systems, including level control. This is often used to ensure that fluid in the tank is available in the appropriate amount at each stage of the process. The process typically uses an automatic control system such as a Proportional Integral Derivative (PID) Controller that can help measure the accuracy of the data obtained. Therefore, this study aims to examine the effect of flow rate on fluid level control in a tank using linear, exponential, and logarithmic regression analyses. In the process, the effect of the automatic control system (PID Controller) on fluid flow rate was evaluated. The materials used were a 4 mm solenoid and a pump speed variation in the range of 30-50%. Data on fluid level increase were obtained at 0 (n = 1), 60.27 (n = 30), and 180 seconds (n = 61) as the lower, middle, and upper limits. The results showed that fluid flow rate significantly affected the process of controlling fluid level in the tank, and is influenced by the speed of the pump used. Based on the regression analysis, the evaluation of the PID Controller was still classified as good, because the deviation observed in the reading flow rate data was very small.
Bioplastik Berbasis Pati Sagu dengan Penambahan Filler Microfibrillated Cellulose dan Refuse-Derived Fuel Khairunisa Betariani; Puji Rahayu; Winda Sri Jaman; Mohammad Wirandi
Nucleus Journal Vol. 4 No. 1 (2025): May
Publisher : Universitas Darul Ulum

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32492/nucleus.v4i1.4105

Abstract

This study aims to develop starch-based bioplastics using sago starch with the addition of Microfibrillated Cellulose (MFC) and Refuse-Derived Fuel (RDF) fillers to enhance mechanical properties and material sustainability. Sago starch was selected as the base material due to its biodegradability, while MFC derived from empty palm oil fruit bunches served as a structural reinforcement, and RDF was introduced as an additional filler sourced from processed organic and inorganic waste. The bioplastic production process involved starch gelatinization, mixing with MFC and RDF solutions, addition of sorbitol as a plasticizer, casting, and natural drying. Characterization included morphological analysis and mechanical testing. Results showed that the sago starch+MFC bioplastic exhibited a more homogeneous surface morphology and superior mechanical properties, with a maximum tensile strength of 10.6 MPa and elongation at break of 5.7%. The addition of RDF increased material density but reduced homogeneity and toughness, with fracture energy per volume drastically decreasing from 488.28 kJ/m³ to 41.15 kJ/m³. Overall, the combination of sago starch and MFC offered better mechanical performance, while RDF addition requires optimization to maintain structural integrity. This innovation supports waste utilization and promotes circular economy principles in the development of environmentally friendly materials.
Co-Authors Ari Adrianto Mohammad Wirandi Nurmalasari Puji Rahayu Rachmadi Tutuka Winda Sri Jaman