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For the treatment of wine cellar effluent, we favour the activated sludge process.  The activated-sludge process is a biological method of wastewater treatment that is performed by a variable and mixed community of microorganisms in an aerobic aquatic environment. These microorganisms derive energy from carbonaceous organic matter in aerated wastewater for the production of new cells in a process known as synthesis, while simultaneously releasing energy through the conversion of this organic matter into compounds that contain lower energy, such as carbon dioxide and water, in a process called respiration. As well, a variable number of microorganisms in the system obtain energy by converting ammonia nitrogen to nitrate nitrogen in a process termed nitrification. This consortium of microorganisms, the biological component of the process, is known collectively as activated sludge. The bioreactor is sized and aerated to remove COD, nitrogen and phosphorous.
Bioreactor at Durbanville Hills before installation of the aeration domes Bioreactor floor showing distribution of aeration domes Rebar for Stellenbosch Hills RC floor raft