Abstract: A method for operating a wastewater treatment plant for treating effluent, in particular for recovering phosphorus from the effluent to be treated and for respecting a phosphorus discharge limit in the effluent. The method includes the steps of carrying out an enhanced biological phosphorus removal process on at least a part of the effluent to be treated in a water line of the plant, deriving a sludge from the effluent that is being treated in the water line of the plant, subjecting the derived sludge to a step of acidification giving an acidified sludge, and carrying out a step of a first recovery of a phosphorus product in a liquid phase of the acidified sludge or directly in the acidified sludge giving a re-usable product and a phosphorus depleted acidified sludge.

Abstract: The invention relates to a method for determining a maximum allowable volume of water that can be removed over time from an underground water source, the volume of water being removed at a removal point and the hydrogeological state of the underground water source being qualified by piezometric measurements on a reference piezometer, the method being characterized in that it includes, in particular, a continuous measurement by a first piezometric level sensor on the removal point, the sensor having a first log of available data over a predetermined period that has passed; and another continuous measurement by a second piezometric level sensor on the reference piezometer, the second sensor having a second log of available data over the predetermined period that has passed; the method also comprising subsequent steps implemented by a calculation machine.

Abstract: A system for quantitative water management comprises: at least two interconnected water production entities (U), at least one water resource (S) linked to one at least of the production entities (U), at least one demander element (D) requesting water produced defined by a pre-established temporal curve of water demand produced as a function of time, each link between production entities (U), water resources (S) and demander elements (D) being ensured by a transfer work (C) having a predetermined maximum flowrate and being able to be interconnected, each production entity (U) and each water resource (S) furthermore being associated with a weighting function P, and a calculator adapted to minimize the global weighting function Pg of the system while guaranteeing compliance with the pre-established temporal curve of water demand produced of each demander element (D) under constraint of compliance with the maximum flowrates of the various elements of the system.

Abstract: Some embodiments are directed to a method for guiding a high-pressure cleaning device for cleaning the inside of heat exchanger tubes, wherein the human eye has been replaced by an acquisition device, enabling to obtain images, making the automatic detection of tubes to be cleaned possible, with the possibility of remote visualization.

Abstract: A selective sorting method is described to identify and sort material objects of different natures, sizes and shapes having the form of a pile. The method is characterized in that the attribution of the nature of the object to be sorted includes in capturing at least one two-dimensional image wherein the object appears, using at least one sensor for electromagnetic radiation and in diffusing at least one of the two-dimensional images on a display screen that can be observed by an operator, the operator attributing a nature to the object viewed. A device able to implement the method is also described.