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Rocher V.,Siaap Direction de la Recherche et Developpement | Groleau A.,University Paris Diderot | Escoffier N.,University Paris Diderot | Garcia-Gonzalez E.,Siaap Direction de la Recherche et Developpement | And 4 more authors.
Techniques - Sciences - Methodes | Year: 2013

Due to changes in the engineering and regulatory environment, the Siaap was driven to undertake, together with its scientific partners of the Laboratoire de Geochimie des Eaux, the development of a new surface water quality monitoring network, namely the CarboSeine network. Through this prototype network, it became possible to conduct a continuous monitoring of the conventional physical and chemical parameters (temperature, conductivity, pH), dissolved oxygen, phytoplankton biomass (total chlorophyll a and contribution from both four classes of micro-algae and dissolved humic substances), suspended particles (turbidity, size), organic matter (dissolved organic carbon) and orthophosphates. The test campaigns as carried out in the treatment plant which was set up in Bougival in 2011 were used to assess the quality of data as provided by the in-prototype plants sensors. Hence, the validation tests made it possible to evaluate the quality of those data collected through the orthophosphate analyser (Cycle-P, Wet-Labs) and the MP6 (NKE) multiparameter probe. As regards the latter probe, further actions shall nevertheless be taken for addressing the problem of the turbidimeter fouling, which is particularly acute upon algal blooms. Additionally, the validation tests were an opportunity to assess the quality of data as provided by the Fluoroprobe II (BBE-Moldaenke) probe, with respect to the continuous measurement of total chlorophyll a. Further investigations are required to assess the ability of that probe to finely discriminate the contributions from four classes of micro-algae (diatoms, cyanobacteria, chlorophytes, crypto- phytes) in that total phytoplankton biomass.

Azimi S.,Siaap Direction de la Recherche et Developpement | Rocher V.,Siaap Direction de la Recherche et Developpement
Techniques - Sciences - Methodes | Year: 2016

In the context of the energy transition, large municipal WWTP came to understand the importance of issues related to energy expenditure. One of these major industrial in the Paris conurbation, the Syndicat interdépartemental pour l'assainissement de l'agglomération parisienne (Siaap), has set up for several years actions allowing the optimization of its energy consumption in order to reduce costs but also the associated environmental impacts. Through the installation of energy (electricity, gas, fuel, biogas) meters for sectorial recording, an accurate mapping of energy consumption has been carried out at different scale (macroscopic, site, process). Electrical energy has emerged as the leading source of imported energy in WWTP while biological treatment processes (air blowing) are at the forefront of consumers. On this basis, the optimization paths to reduce energy consumption were described, requiring action at three levels. First, the optimization of operating costs must consider the complete treatment process, covering all expenses (regent, etc.) to make best operating choices. Second, within processes including air blowing, improvement of the air injection flow rate constitutes an effective means for the reduction of energy consumption. Last, the monitoring of electric counting of main equipment is essential in order to contain excessive consumption. © ASTEE 2016.

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