Ozonização como proposta de tratamento para o soro do leite produzido na indústria de laticínios

Abstract

Amidst the growing concern of the community and public bodies in relation to the proper management of natural resources, efforts to preserve water, an indispensable resource for life, stand out. The generation of effluents through anthropogenic activities is inevitable, therefore, it is necessary to apply effective treatments, which confirm to the treated effluent discharge conditions that respect current legislation. This study proposes an alternative approach to treat whey, known for its high organic load and polluting potential. The whey remained in a UV-ozonation process that acts on the emission of pollutants, degrading them and involving them in simpler substances, which can be removed by processes commonly used in subsequent steps. Seven assays were performed testing different combinations of levels for time and pH. Data planning and treatment followed the response surface methodology. Treatment efficiency was evaluated by comparing physicochemical data obtained before and after treatment, with emphasis on COD and BOD. It was identified through the MSR that the greater efficiency occurred with a more acidic medium and longer reaction time. The treatment showed potential in removing the organic load, however, the results were not efficient, not complying with the applicable legislation. Even not reaching the expected result in its entirety, this research work offers a solid and valuable base for future studies on the subject, being able to explore new approaches, techniques and methodologies to improve the treatment of the effluent.