Selection of Optimal Purification Regimes of Liquid Waste of Manufacturing Bone Meal by the Coagulation Method

Abstract

Currently, a large amount of waste and drains, which are characterized by high values of the chemical oxygen demand and maximum concentration limit as well as by the
presence of organic impurities, is formed at enterprises of meat-processing industry. Such waste should be purified before the discharge into the treatment facilities. In this
study, the problem of purification of hot liquid waste of meat-processing industry is considered by the example of the production waste of bone meal. The possibility to perform
the coagulation at 65-85°C is shown for the first time. Regimes of physicochemical purification of mentioned waste, notably, the coagulant type and process conditions,
are selected. The advantage of using calcium oxide for the preliminary titration of the drain is shown. The joint use of coagulants and flocculants is considered.