Sunday, 27th September 2020

Remote Control of Wastewater Sanitation Quality in Terrassa

July 2010 

Adasa is currently concluding the introduction of an automatic network for remote control of the quality of wastewater and related infrastructure in the sewerage network of Terrassa, in order carry out characterization of network emanants, spill detection, automation of infrastructure and analysis of preventive information to make operation of the sewage treatment plant more efficient.

The project includes the introduction of 4 wastewater quality control stations, mainly equipped with a sample collection system, automatic analysers, and a SCADA (Supervisory Control and Data Acquisition) system sending events and alarms to the control centre. In addition, it also includes integration and automation of 8 wastewater treatment stations, 9 pumping stations and 21 unitary system discharge control points.

Both the new elements introduced and their integration guarantee the supervision, control and remote management of the system, as well as management of alarms enabling speedy maintenance action.

A control centre will also be created for reception and processing of the data received from all the facilities which will make up the remote control network, accessible locally or via Internet.

The system is planned to come into operation in September, when the integral maintenance period begins, and will allow:

• Continuous, real-time viewing of the parameters pH, temperature, conductivity, dissolved oxygen, redox potential, turbidity, organic matter and flow. In addition, hydrocarbon, DBO and ammonium analysers have been installed in the wastewater quality control stations experimentally.
• Assessment of the wastewater pollutant load at different strategic points of the sanitation system, rating it in relation with the legislation in effect.
• Automatic collection of wastewater samples at different points in the sewer network covered the moment a pollution episode is detected, in order to allow its origin to be identified and subsequently thorough laboratory analysis to be carried out.
• Determination of the alarm thresholds to facilitate decision-making in the wastewater treatment plant's management, with the objectives of achieving optimum efficiency and guaranteeing the plant's correct operation.
• Establishment of plans for the reduction of specific pollutants and actions aimed at specific industrial sectors.
• Encouragement of good environmental practices, focussed on the main incidents detected.
• Planning of regular controls and inspections and the corresponding deterrent corrective and/or preventive measures.

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