Comparative evaluation of the coagulation methods effectiveness in the extraction of biologically active components from highly concentrated effluents

A characteristic feature of highly concentrated effluents is the presence of valuable components - biologically active substances, which are secondary raw materials. The effectiveness of physico-chemical coagulation and electrocoagulation methods in relation to highly concentrated wastewater from a poultry processing enterprise, as well as the prevention of the secondary pollution of the effluent supplied to biological treatment, were analyzed in the work. The objects of the study included poultry stock (suspended solids 1770.0 mg / dm3, dry residue 1920.0 mg / dm3, chemical oxygen demand (COD) 1769.0 mg O2 / dm3), iron (III) FeCl3 chloride, iron soluble electrodes as the coagulant. The objectives of study involved determination of wastewater treatment effectiveness by the studied methods (physico-chemical coagulation and electrocoagulation) with the priority indicators changing: suspended solids, dry residue, chemical consumption of oxygen, iron, chlorides, and the precipitated residue mass...