Technology of Wastewater Treatment Production of Vegetable Oils and Fats and Evaluation of Aeration Tank Efficiency on the Basis of Microanalysis of Activated Sludge

Abstract

This article discusses the main stages and features of wastewater treatment at "Food Ingredients" LLC (Russia, Krasnodar region) involved in vegetable oils and fats refining. The experimental data on averaged qualitative composition of industrial wastewater involving the period from January to June, 2018 were presented. The indicators of the quality of averaged waste did not exceed: 20 mg/l for ammonium nitrogen; 20 mg/l for phosphates; 800 mg/l for suspended solids; 700 mg/l for fatty substances. The operation of biological aeration tank was analyzed from January to June, 2018. The graphic dependences of the change of sludge index, phosphate ions, chemical oxygen demand (COD), and temperature were given. The species composition of microorganisms and their amount were determined by means of optical microscopy. Absolute quantity of microorganisms in activated sludge was determined with the "calibrated droplet" method.