Treatment of dairy waste using grease box and anaerobic baffled reactor followed by constructed wetland

This paper aimed at evaluating the performance and the efficiency of a treatment system on dairy wastewater that consisted in removing the organic load from a dairy industry. This was done by using a compost system of grease boxes, an anaerobic baffled reactor and a constructed wetland of subsurface flow cultivated with Typha sp. having gravel 1 as the support means and under different timings of hydraulic detention (3 and 5 days) in the wetlands. In the treatment performed using the detention time of 3 days the average removal of BOD and COD, was 98,87% and 99,77% respectively; whereas in the treatment that was performed in 5 days as the hydraulic detention time the average removal of BOD was 99,51% and of COD was 99,56%. The results show that the system was efficient in the treatment of dairy wastewater.