Optimizarea schemelor tehnologice de pre-tratare chimică pentru eliminarea substanțelor flotante din apele uzate în industria alimentară

Abstract

This study focuses on optimizing pre-treatment technological schemes for the removal of floating substances from wastewater in the poultry and dairy processing industries. The methods of pneumatic flotation and chemical pretreatment have been developed and recommended by service providers in the industry. Chemical substances such as aluminum sulfate, cationic flocculant "Dry Flock 650," and sodium hydroxide were used for pH adjustment. In the dairy industry, tests and experiments determined the optimal quantities of coagulant, flocculant, and caustic soda needed for treating 120-130 m3 of water daily, resulting in significant savings compared to existing proposals. Similar results were obtained in the poultry processing industry, with considerable cost savings through the implementation of the proposed technological scheme. The implementation of these technological schemes led to a significant reduction in operational costs, representing effective savings of 508 thousand lei per year for the dairy industry and 2088 thousand lei per year for the poultry industry. This study emphasizes the effectiveness and viability of these technological schemes in the specific context of both industries, providing a sustainable and economical solution for wastewater treatment.