It is the largest Tunisian processor of canned fish Thon Sidi Daoud. WITKOWITZ ENVI analyzed the parameters of the wastewater discharged from the Cap Bon plant. As a supplier of wastewater treatment plants and biogas plants, we have proposed remedial solutions in this technological chain. Sampling for their analysis is performed by ABCo. and their subsequent analysis by an accredited testing laboratory meeting the requirements of ISO 17025 at the Center for Environmental Technologies in Tunis, CITET. This analysis will be followed by WITKOWITZ ENVI in order to comply with international wastewater regulations and the consequent reduction of its consumption.