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All Journal CHEESA: Chemical Engineering Research Articles Jurnal Ilmiah Berkala Sains dan Terapan Kimia SAINTI: Majalah Ilmiah Teknologi Industri Jurnal Agrifoodtech Nucleus Journal
Puji Rahayu
Politeknik Industri Petrokimia Banten
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Engineering Industrial & Manufacturing Engineering

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ANALISA HEAD LOSS DAN KERJA POMPA DENGAN VARIASI PERUBAHAN DIAMETER PADA SISTEM PEMIPAAN Agung Kurnia Yahya; Puji Rahayu; Hasnah Ulia; Achmad Yanuar Maulana
JURNAL ILMIAH TEKNOLOGI INDSUTRI (SAINTI) Vol 19, No 2 (2022): VOL 19 NO 2 DESEMBER 2022
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (286.699 KB)

Abstract

Fluids often experience a loss of energy (head loss) in the pipe due to flow turbulence, which results in friction on the inner surface of the pipe. Head loss is very detrimental in piping systems because it can reduce the level of fluid flow efficiency. Head loss is affected by variations in bends (elbows), joints, valves, and pipe diameters. The purpose of this study is to determine the head loss that occurs in each line of the fluid flow piping system, which consists of variations in the cross-sectional area of the pipe and the number of connections, valves, and bends. In addition, it is also used to evaluate pump work in series and complex circuits. The smaller the diameter, the more the fluid velocity increases, causing the friction in the pipe to increase and the head loss to increase. The pump work required to flow the fluid is directly proportional to the amount of head loss that occurs in the piping system.
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.
Performance Evaluation of Bentonite–Nano SiO₂ as an Adsorbent in the Decolorization Process of Rhodamine B Regna Tri Jayanti; Miftahul Khairati; Enny Nurmalasari; Puji Rahayu; Dennis Farina Nury; Okti Ulandari; Andhini Putri Trianita
Jurnal Sains dan Terapan Kimia Vol 20, No 1 (2026)
Publisher : Jurnal Ilmiah Berkala Sains dan Terapan Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v20i1.24444

Abstract

Among various sources of industrial water pollution, effluents from printing, dyeing, and textile processes represent one of the most significant environmental threats. These wastewaters contain numerous toxic and hazardous substances that are difficult to biodegrade. This study investigates the synthesis, characterization, and adsorption performance of a Bentonite–Nano SiO₂ composite for the removal of Rhodamine B dye from aqueous solutions. The research was conducted in two main stages: the preparation of the Bentonite–Nano SiO₂ composite and the evaluation of its adsorption performance at various adsorbent concentrations and contact times. The composite was synthesized by dispersing nano-silica (15% w/w) into bentonite using ethanol as the solvent, followed by stirring, filtration, and drying processes. Characterization using Scanning Electron Microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FTIR) confirmed successful modification. Adsorption tests showed that Rhodamine B removal efficiency increased with higher adsorbent concentration, reaching optimal conditions at 0.75% (w/v) with a removal efficiency of 90.2% after a contact time of 10–15 minutes. The enhanced adsorption performance was attributed to the larger surface area, higher porosity, and increased number of active sites resulting from the incorporation of nano-silica
ANALISA HEAD LOSS DAN KERJA POMPA DENGAN VARIASI PERUBAHAN DIAMETER PADA SISTEM PEMIPAAN Agung Kurnia Yahya; Puji Rahayu; Hasnah Ulia; Achmad Yanuar Maulana
SAINTI: Majalah Ilmiah Teknologi Industri Vol. 19 No. 2 (2022)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/

Abstract

Fluida sering kali mengalami kehilangan energi (head loss) di dalam pipa karena adanya turbulensi aliran yang mengakibatkan gesekan di permukaan pipa bagian dalam. Head loss sangat merugikan dalam sistem pemipaan karena dapat menurunkan tingkat efisiensi aliran fluida. Head loss dipengaruhi oleh variasi belokan (elbow), sambungan, katub (valve), dan diameter pipa. Tujuan dalam penelitian ini adalah mengetahui head loss yang terjadi di tiap line pada sistem pemipaan aliran fluida yang terdiri dari variasi luas penampang pipa, jumlah sambungan, katub, dan belokan. Selain itu juga untuk mengevaluasi kerja pompa dengan pada rangkaian seri maupun kompleks. Semakin kecil ukuran diameter menyebabkan kecepatan fluida meningkat sehingga menyebabkan friksi yang ada dalam pipa semakin besar, hal tersebut menyebabkan head loss semakin besar. Kerja pompa yang dibutuhkan untuk mengalirkan fluida berbanding lurus dengan besarnya head loss yang terjadi pada sistem pemipaan.
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.
Karakterisasi Kandungan Karbohidrat dan Protein pada Berbagai Bahan Pangan Menggunakan Uji Kualitatif Benedict, Biuret, dan Fehling Maghfira Arum Lestari; Dennis Farina Nury; Puji Rahayu; Amelia Naomi Agustina; Muhamad Iqbal Putra; Rizky Ibnufaatih Arvianto; Adna Ivan Ardian; Diva Yustika; Mahesa Niko; Fajar Dwi
Jurnal Agrifoodtech Vol. 5 No. 1 (2026): Jurnal Agrifoodtech
Publisher : Universitas 17 Agustus 1945 Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56444/0vzsx757

Abstract

Karbohidrat dan protein merupakan nutrisi penting yang dibutuhkan oleh tubuh. Penelitian ini diarahkan untuk melakukan identifikasi kualitatif karbohidrat (gula pereduksi) dengan uji benedict dan uji fehling, serta melakukan identifikasi/konfirmasi protein dengan uji biuret pada berbagai sampel pangan, serta mendiskusikan interpretasi hasil uji. Pada uji biuret, perubahan warna menjadi ungu / violet menandakan adanya protein (ikatan peptida). Pada uji benedict, perubahan warna menjadi hijau berarti terdapat sedikit gula reduksi, kuning berarti sedang, oren berarti signifikan, dan terberntuk endapan merah bata berarti banyak terdapat gula reduksi. Pada uji fehing, hasil positif ditandai dengan berubahnya warna larutan biru menjadi hijau dan terdapat endapan merah bata. Pangan yang signifikan mengandung protein adalah tempe, ayam, nugget, sosis, dan telur mentah. Pangan yang mengandung protein tetapi tidak begitu siginifikan adalah roti tawar dan croissant. Bahan pangan yang tidak terdeteksi adanya kandungan protein pada uji biuret adalah mie dan jeruk nipis. Bahan pangan yang signifikan mengandung gula pereduksi adalah nasi, mie, croissant, dan roti tawar. Bahan pangan yang tidak begitu signifikan mengandung gula pereduksi adalah jeruk nipis, tempe, nugget, dan telur mentah. Bahan pangan yang tidak mengandung gula pereduksi pada penelitian ini adalah ayam dan sosis.
Co-Authors Achmad Yanuar Maulana Achmad Yanuar Maulana Adna Ivan Ardian Amelia Naomi Agustina Andhini Putri Trianita Ari Adrianto Dennis Farina Nury Diva Yustika Enny Nurmalasari Fajar Dwi Hasnah Ulia Khairunisa Betariani Maghfira Arum Lestari Mahesa Niko Miftahul Khairati Mohammad Wirandi Muhamad Iqbal Putra Nurmalasari Okti Ulandari Rachmadi Tutuka Regna Tri Jayanti Rizky Ibnufaatih Arvianto Winda Sri Jaman Yahya, Agung Kurnia