REAGENT PRETREATMENT OF WASTEWATER FROM SOFT DRINK PRODUCTION TO IMPROVE ANAEROBIC BIOREACTOR PERFORMANCE

Nasirova Nilufarkhon Kabildjanovna; Mukhamedov Kabildjan Gafurovich

Authors

Nasirova Nilufarkhon Kabildjanovna Candidate of Chemical Sciences, Associate Professor, Tashkent State Agrarian University, Republic of Uzbekistan, Tashkent
Mukhamedov Kabildjan Gafurovich Doctor of Technical Sciences, Professor, Islam Karimov Tashkent State Technical University, Republic of Uzbekistan, Tashkent

Keywords:

soft drink production, wastewater, coagulation, flocculation, suspended solids, turbidity, anaerobic reactor, reagent pretreatment, sludge dewatering.

Abstract

The article presents a scientific justification for reagent pretreatment of wastewater generated during the production of soft drinks and fruit beverages containing pulp. Such wastewater is characterized by a high content of dissolved organic compounds, finely dispersed suspended solids, pectin substances, sugars, organic acids and washing residues. The introduction of pulp-containing juice lines sharply increases chemical oxygen demand and the concentration of suspended solids, which may destabilize anaerobic biological treatment. The study substantiates the use of coagulation and flocculation as a preliminary physicochemical stage before anaerobic treatment. Aluminum oxychloride-based coagulants and anionic polymer flocculants promote destabilization of colloidal particles, formation of large flocs, rapid phase separation and reduction of the load on the anaerobic bioreactor. The proposed approach improves the operational stability of wastewater treatment facilities and reduces risks associated with floating layers, biomass washout and excessive sludge formation.

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