Customer:

GS Inima – Eiffage Infraestructuras – Ullastres

Country:

Spain

Year:

2019

Category:

Bidding

Description

PROJECT AND WORK FOR THE ADEQUACY OF THE TREATMENT OF THE SEVILLE WWTP FOR THE DISCHARGE TO A SENSITIVE AREA IN THE SURROUNDINGS OF DOÑANA. Phase 4: ADAPTATION OF WWTP COPERO.

Treatment Flow

Daily medium: 269.177 m3/h, Half time: 11.215 m3/h, Maximum hours: 21.840 m3/h

Characteristics

Water line formed by; Coarse and pre-roughing well, Elevation of raw water to 1st stage biological treatment, 1st stage biological reactors, New distribution to primary settling, Remodeling of existing biological reactors, Increase in flow to new biological reactors, Distribution pit to new biological reactors , New 2nd stage biological reactors, Internal recirculation of mixed liquor in new and existing 2nd stage reactors, Distribution pit to existing secondary decanters, Distribution pit to new secondary decanters, New secondary decanters.
Sludge line formed by; Pumping of recirculating 1st stage sludge, Pumping of recirculating sludge from existing secondary settling, Pumping of recirculating sludge from the new secondary settling, Gravity thickening-fermentation of 1st stage sludge, Pumping of biological sludge in excess of the new one secondary settling, Flotation thickening of biological sludge, Mixing of 1st stage sludge thickened by gravity with co-substrate, Pumping of sludge thickened by gravity + co-substrate to pre-digestion, New anaerobic digesters for extension of pre-digestion, Remodeling of the existing dehydration building, Conditioning and dehydration of sludge, Storage of dehydrated sludge prior to hydrolysis, Pumping of dehydrated sludge to hydrolysis, Thermal hydrolysis, Hydrolyzed sludge storage tank, Pumping of hydrolyzed sludge to post-digestion, Conditioning and dehydration digested sludge, Storage of dehydrated sludge.
Gas line formed by; Gas storage, Energy recovery, Excess gas burning.

Scope

Process calculation.
Hydraulic design.
Study of operating costs.
Architectural and odor management solutions.
Study of the interferences with the existing WWTP during the works and measures to maintain and ensure compliance with the discharge requirements.
Preparation of plans.
Preparation of measurements and budgets.
Preparation and integration of the final tender project.