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Wastewater treatment plants of San Luis Talpa and San Juan Opico / El Salvador

Wastewater treatment plant San Luis Talpa

DESCPRIPTION OF PROJECT

For either of the towns of San Luis Talpa (3,400 inh.) and San Juan Opico (13,500 inh.), we were in charge of the design, tendering and construction supervision of a wastewater treatment plant using trickling filters.

The main components of the sewage treatment plants include: grit chamber, primary settling, trickling filter and final settling. The separate sludge treatment takes place in a digester followed by drying beds. Treatment by trickling filtration is a largely fail-safe procedure which will maintain the plant's purifying level sufficiently high even in case of plant operating errors or after an accidental input of toxic matter into the sewer system.

In principle, the plants are fed via gravity lines as far as the local topography so allows. Additional energy supplies will then be needed only for the recirculation process, so that an almost complete treatment can be guaranteed even in case of power breakdowns.

PROJECT COMPONENTS AND
TECHNICAL DATA

2 Trickling filter plants with grit chamber, primary settling and final settling for 3,500 and 13,500 p.e., respectively
Sludge treatment in digester tanks and drying beds
Sewage generally conveyed to the WWTP via gravity lines
Length of sewer system: 1,000 to 3,000 m

BRIEF DESCRIPTION

Design, tendering and construction supervision of 2 wastewater treatment plants (trickling filter system) for 3,400 and 13,500 p.e., respectively

CLIENT

Administración Nacional de Acueductos y Alcantarillados (ANDA), San Salvador

FINANCING

KfW Entwicklungsbank

SCOPE OF SERVICES

Inventory, topographic survey, site selection,
Subsoil investigations
Final design, tendering, assistance in contract award
Construction supervision, final handing-over, start-up operation
Training/upgrading, institutional strengthening
Awareness building