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The control of the biodiesel production plays an important role on achieving the production standard of the biodiesel. The quality of the produced biodiesel depends on the raw materials, alcohol and catalyst selections and process and storage conditions. The control of the biodiesel production not only enables to achieve high quality biodiesel but also maintains the continuity of the product quality. In this work, an automation system for a two stage biodiesel production is designed and realized. A PLC (Programing Logic Control) based system is used for this purpose. The designed and realized biodiesel production facility enables to produce biodiesel using either a single stage or a two stage process. The quality of the biodiesels separately produced using a single stage and a two stage process are analysed and compared. The analysis results show that a two stage biodiesel production process gives better results compared to the single stage in fuel density, viscosity and flash point.  Ozet: Biyodizel uretimi kontrol biyodizel uretim standardi ulasmada onemli bir rol oynar. Uretilen biyodizelin kaliteli hammadde, alkol ve katalizor secimleri ve surec ve depolama kosullarina baglidir. Biyodizel uretiminde sadece kontrol kaliteli biyodizel elde etmek icin olanak degil, ayni zamanda urun kalitesinin surekliligini saglar. Bu calismada, iki asamali bir biyodizel uretimi icin bir otomasyon sistemi tasarlanmis ve gerceklestirilmistir. Bir PLC (Programlama Logic Control) tabanli sistem, bu amacla kullanilir. Tasarlanmis ve gerceklesen biyodizel uretim tesisi, tek bir sahne ya da iki asamali bir surec kullanarak biyodizel uretmek icin olanak saglar. Dizellerden kalitesi ayrica, tek bir sahne ve analiz ve karsilastirilmistir iki asamali bir islem kullanilarak uretilen. Analiz sonuclari iki asamali bir biyodizel uretim sureci, yakit yogunluk, viskozite ve parlama noktasi tek asamaya oranla daha iyi sonuclar verdigini gostermektedir.

Automation of the Two Stage Biodiesel Production Process / İki Aşamalı Biyodizel Üretim Süreci Otomasyonu