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Bagnols Wastewater Treatment Plant
France

This wastewater treatment plant  will be built to the South East of Bagnols sur Ceze, in the wine-growing region of Languedoc-RoussiIIon, on the plains of the river Euze, amongst the vineyards. It will receive the municipal and viticulture effluent from seven surrounding communities.

Biwater has worked closely with architects to sensitively integrate the design of the plant into the vineyards and to reflect the traditional construction methods of the Provence region.

The new WwTP will be equipped with a biological dephosphation system, a tertiary filtration and a UV treatment system.

Features of effluent to be treated

Municipal and viticulture effluent

Capacity 35,000 PE
Daily flow 10,840 m3/d
Peak flow 850 m3/h
BOD5 2,576 kg/d
COD 6,441 kg/d
TSS 5,059 kg/d
Ammonia NH3 517 kg/d
Phosphorus P 112 kg/d

Quality of final effluent

BOD5 25 ppm
COD 125 ppm
TSS 35 ppm
NGL 15 ppm
Phosphorus P 1.5 ppm
Fecal coliforms <1,000/100 ml

Features of works

Pre-treatment
6 mm double mechanical screening
Grit and grease removal (cylindrical unit)
Septic waste imports
Biological treatment of grease

Biological treatment
Biological aeration tanks (extended aeration)
Clarifiers

Tertiary treatment
Sand filtration
Disinfection by UV treatment Wastes from sewer cleaning

Sludge treatment
Dewatering by centrifuges

Odour control
Chemical odour treatment Biological dephosphation system

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