Tedagua to build the new Nabeul waste water treatment plant for 16 million euros
L’Office National de l’Assainissement (ONAS) of Tunisia has awarded TEDAGUA the contract for the “Rehabilitation and expansion of waste water treatment station SE4 in Nabeul”. The project is financed by the Banque Allemande de Développement (KfW), the Agence Française de Developement (AFD) and the European Union, with a budget of 35,130,717.63 dinars (approximately 16.3 million euros).
The project, which has a completion deadline of 36 months, includes demolition of the existing treatment plant in Nabeul and construction of the new plant, which is designed for an average flow of 16,538 m3/day, with peaks of up to 23,669 m3/day, supplying an equivalent population of 172,800.
The process designed by TEDAGUA consists of degreasing, de-silting, primary settling, nitrification-denitrification with phosphorus removal and biological treatment with activated sludge. The sludge line will consist of mechanical dewatering of the sludge, anaerobic stabilization by digestion, and cogeneration through energy recovery from the biogas. The tertiary treatment of the treated water will be done by continuous filtering and treatment with UV radiation. Odours will be treated using photo-ionization.
This new contract from the ONAS for the waste water treatment plant strengthens TEDAGUA’s presence in Tunisia after inauguration in 2012 of the expansion of the Bizerte treatment plant, with an output of 26,600 m3/day to supply an equivalent population of 200,000 people.