Estudo das possibilidades de reaproveitamento de águas residuais na fábrica de coca-cola SABCO de Maputo (Moçambique)

Abstract

The present work follows on from an internship carried out at the Coca-Cola SABCO factory in Maputo, which as an industrial unit in the food sector (non-alcoholic beverages) has water as its main raw material. In this type of industry, water consumption is variable, depending on several factors such as the technologies implemented, age of the plant, operational aspects, etc. However, the quantities consumed are always high and in general also, of high quality water. As water is its main raw material, the implementation of a water management and conservation program emerges as a fundamental strategy for the future sustainability of the sector. The objective of the work is to study the possibilities of reusing the final effluent. This study makes possible the efficient use of water and reduction of the generation of effluents, facilitating the environmental, economic and social benefits. The methodology was based on bibliographic review, experimental part, analysis and discussion of results and preparation of the report. In this way, despite the limitations, physical-chemical parameters of the final effluent were analyzed, in order to produce credible information to support decisions. The final effluent was characterized during the three-month period and the results obtained were compared with the standards of the internal requirements established by the Coca-Cola Company and international requirements for the reuse of wastewater for different purposes. The characterization of the effluent comprised the following parameters of wastewater quality: pH, Ammonia, Phosphorus, BOD, COD, Total Nitrogen and TSS. As a result of the experimental results obtained, it was found that the values ​​were within the maximum limits acceptable by the TCCC, with the exception of Nitrogen for the months of February and March, values ​​above the maximum acceptable limit (5 mg / L) were obtained. From the analysis performed, maximum values ​​of 40 mg / L of TSS, 0.95 mg / L of Ammonia, 6.30 mg / L of Total Nitrogen, 0.89 mg / L of Phosphorus, 11 mg / L of BOD, COD were obtained found itself below the range. The pH was obtained 7.10 and 8.14 the minimum and maximum respectively. International (Brazilian) standards for reuse were used, because among the standards consulted, no data were found regarding the parameters that were analyzed.