V. Dimova* Department of Agrarian Engineering, Faculty of Agriculture, Trakia University, 6000 Stara Zagora, Bulgaria (Manuscript received 18 March 2022; accepted for publication 20 May 2022) Abstract. A total of 20 popular technical and technological schemes of semi-open four-row bui

I. Sirakov, Y. Staykov , G. Djanovski Abstract. The purpose of the study was to determine the dissolved oxygen consumption of rainbow trout, cultivated in raceway. The consumption analysis is based on a process automatic oxygen measurement system and compares the theoretically calcula