Accra Sewerage Improvement Study
The objectives of the project are through implementation of several waste water transfer systems to treat their effluent at 3 different sewage pond systems and 2 sea outfalls to improve the environmental conditions and alleviate health risks in Accra City.
Client:
Ghana Water Company Ltd. (GWCL)
Period:
2003 - 2005
Services:
- Review of previous study
- Oceanographic survey and modelling of sea outfalls
- Organisation of stakeholders workshops
- Environmental and social impact assessment
- Environmental management plan
- Detailed design of Phase I of the project and rehabilitation of existing sewer network
- Preparation of tender documents for local and international bidding for works and for procurement of equipment for sewer system
Technical data:
- Population served 2020 2,700,000 inh.
- Project area 147 km²
- 6 waste water transfer schemes 28 km, DN 200 to 500, BOD5 load 14,200 kg per day
- 9 pumping stations up to 450 l/s
- 3 waste water pond systems
- 2 sea outfalls total length 1,850 m, DN 500 and 700 mm
- 146 new public toilets
- 10 liquid waste discharge points
- Rehabilitation of existing sewerage nerworks