AREMA IS AWARDED THE CONSTRUCTION OF THE REMODELING WORKS OF THE CURRENT TIVENYS WASTE WATER TREATMENT STATION (BAIX EBRE).

AREMA IS AWARDED THE CONSTRUCTION OF THE REMODELING WORKS OF THE CURRENT TIVENYS WASTE WATER TREATMENT STATION (BAIX EBRE).

The Consell Comarcal del Baix Ebre has awarded on February 21, 2022, to the UTE formed by the companies AREMA and RUBAU the contract for the execution of the works for the remodeling of the current wastewater treatment plant of Tivenys (Baix Ebre, Tarragona) for an amount of more than one million euros.

The current biological treatment system, by means of trickling filters, presents a lower than expected organic matter removal performance and does not allow to ensure compliance with Directive 91/271, it is foreseen the remodeling of the biological treatment in a process of activated sludge and complete mixing with an “iron ore” type configuration. In this sense, the main actions included in the remodeling of the Tivenys WWTP are:

  • Hydraulic adaptation of the inlet well and pre-treatment system, consisting of raising the inlet basins and equipping the plant with a biological by-pass.
  • Incorporation of an anoxic selector in the plant to have a better control of the bulking effect that may occur.
  • Modification of the current biological treatment system, consisting of the substitution of the existing trickling filters for a concentric reactor-decanter based on a system of activated sludge by complete mixing.
  • Removal of the current PRFV decantation system.
  • Connection to the treated water pumping station under construction.
  • Construction of a new building of divers and electrical panels above the flood level of the plot (+0.5 m).
  • Incorporation of a new covered sludge thickening system to prevent the release of bad odors.

The WWTP has been designed for a capacity of 150 m3/day. The peak head factor for the sizing of the biological process of the WWTP was set at 3 times the average head, while the maximum head factor or pre-treatment head was set at 5 times the average head. The plant will also be completed with a photovoltaic installation with an installed power of 34 kWp.

The works are expected to last 10 months. This is the first electric self-consumption wastewater treatment plant to be installed by AREMA and RUBAU since the Rubau Group acquired AREMA, a company specializing in water, waste and the environment, thus reinforcing its commitment to the 2030 Agenda and its sustainable development and ecological transition objectives.