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Rudy Agustriyanto
Jurusan Teknik Kimia, Fakultas Teknik, Universitas Surabaya
Chemical Engineering, Chemistry & Bioengineering Chemistry Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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MODEL PRODUKSI BIOETANOL DARI LIMBAH KEJU MENGGUNAKAN KLUYVEROMYCES MARXIANUS Rudy Agustriyanto; Akbarningrum Fatmawati
Jurnal Teknik Kimia USU Vol. 2 No. 3 (2013): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (228.715 KB) | DOI: 10.32734/jtk.v2i3.1445

Abstract

The depletion of oil reserves hasbeen increasing interest in the development of alternative renewable energysources. Cheese whey as a waste of cheese production is one of the raw materials that can be used for bioethanol production. The aim ofthis study is to conduct critical assessment of the cheese whey fermentation process by applying the basic concepts of engineering and mathematics, to investigate the characteristics of the cheese whey fermentation process into bioethanol, and to obtain the optimum design of fermenter. This is done by developing steady state model of cheese whey fermentation system into ethanol based on kinetic data from previous research and using mass balance principle.The model was then used to simulate the continuous fermentation of cheese whey for ethanol production. At steady state conditions, the fermentation process of cheese whey into bioethanol is affected by the hydraulic retention time (R). At steady state conditions, the optimum value of R obtained is 25 hours based onhigh ethanol productivity. The results of this study will be useful in the design process and control of cheese whey fermentation reactions into ethanol.The utilization of waste from cheese production (cheese whey) that contain sugars which can be fermented will provide added value to the waste while providing an alternative source of renewable energy that is needed due to energy crisis.
METODE OPTIMASI PADA SISTEM PENGENDALIAN PROSES TANGKI PEMANAS BERPENGADUK Rudy Agustriyanto
Jurnal Teknik Kimia USU Vol. 6 No. 3 (2017): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (693.268 KB) | DOI: 10.32734/jtk.v6i3.1582

Abstract

In this research, PID (Proportional Integral Derivative) controller tuning was done using optimization method and the result was compared to the other well-known tuning methods (Direct synthesis, Ziegler– Nichols). The purpose of this research is to obtain the best output response when the set point and disturbance are changed. Tuning is a useful process to set the controller parameter that can affect the output response from the changing set point (servo problem) as well as from the disturbance (regulatory problem). The controller performance can be evaluated from the value of Sum Squares of Error when the system is controlled by PID controllers that is tuned with chosen method. The research result showed that optimization method was better than the other methods because it could give the best result.
KENDALI SISTEM BIOREAKTOR KONTINYU Rudy Agustriyanto
Jurnal Teknik Kimia USU Vol. 7 No. 1 (2018): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (569.43 KB) | DOI: 10.32734/jtk.v7i1.1624

Abstract

Tujuan dalam industri bioproses umumnya adalah memaksimalkan pertumbuhan mikroba dan / atau produksi beberapa senyawa yang dihasilkan oleh mikroorganisme. Untuk mencapai hal ini dengan cara yang efisien, maka diperlukan untuk menjaga lingkungan yang sesuai untuk mikroorganisme setiap saat. Tujuan utama penelitian ini adalah untuk menerapkan algoritma kendali PI (Proporsional integral) dan PID (Proporsional Integral Derivative) untuk suatu sistem bioproses. Kriteria Bode kemudian diterapkan untuk memeriksa kestabilan sistem diikuti dengan penentuan parameter pengendali menggunakan metode TLC (Tyreus-Luyben). Hasil simulasi lintas tertutup menunjukkan kinerja pengendalian yang dapat diterima.
Co-Authors Akbarningrum Fatmawati