Abstract: A method for treating wastewater by using a coagulant that aggregates a phosphorus-containing substance. The method includes executing a reaction phase having a biological treatment phase and a subsequent chemical treatment phase. The chemical treatment phase includes the first substep of mixing the wastewater while injecting a predetermined dose of the coagulant into the basin in order for the coagulant to contact and coagulate the phosphorus-containing substances. The injection of the dose of the binding compound into the basin is performed during a time period equal to or more than a time period required to accomplish two mixing turnovers of the wastewater and equal to or less than a time period required to accomplish seven mixing turnovers of the wastewater. The second substep includes mixing the wastewater in order to flocculate the coagulated substance.

Abstract: The invention includes a method and apparatus involving the coding, via colours or other identification means, of substances to be used in administration procedure, including providing a support means (10) having areas (11) correspondingly coded (12) so as to provide an additional reference or confirmation means for users of the invention and reducing the inherent risks associated with administration procedures prone to error. The method includes the steps of positioning coded articles in a first position (2a), prior to use, and placing said articles in a second coded position (2b) after use, including the steps of monitoring and recording the use steps in simultaneous actual time, use confirmation monitoring and subsequent use verification or recordal.