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Study and modeling of dairy effluents treatment using design of experiments methodology

This study focuses on the physico-chemical properties of the Moroccan dairy industrial unit in various locations of the facility between 2014 and 2015. Also to confirm the significant level of pollution caused by the different activities of this industrial unit. Using adsorption on commercial activated carbon, the treatment of the dairy effluent of the facility in terms of chemical oxygen demand (COD) removal, suspended solids, and conductivity decrease. The results show that the dairy effluent is loaded with the organic matter with an average COD of 3,500 mg/L, total Kjeldahl nitrogen (TKN) with an average TKN-N: 45.35 mg/L, the total suspended solids (TSS) value for the main discharge is 460.214 mg/L. Daily monitoring of this physico-chemical characterization in the plant reveals significant values that greatly exceed the permissible limits of the Moroccan standard. Using the experimental design software for the commercial activated carbon treatment model showing p -values for TSS ( p -values = 0.0397) and for COD and conductivity, the p -values are greater than 0.05 p -values (COD = 0.1167; p -values) (conductivity = 0.152). Analysis of variance showed that the R -squared coefficients for COD, TSS, and conductivity, R 2 (COD) = 1, R 2 (TSS) = 1, and R 2 (conductivity) = 0.99, respectively. Because the coefficient values are close to 1. In addition, the best conditions for adsorption of dairy wastewater by commercial activated carbon are adsorbent dose = 10 g/L, pH = 10, and T = 40°C.