Water reuse in Asprovalta, Municipality of Volvi, Thessaloniki
4 June, 2050
Waste water source
The municipal wastewater treatment plant of Asprovalta receives and treats urban wastewater from Asprovalta city.
The treated effluent goes either directly to the river, or to the nearby land area by surface irrigation.
Reclaimed water is used to irrigate natural vegetation areas, with bushes, native trees and olive trees. The irrigated agricultural land is located next to the treatment unit.
Waste water treatment description
Nutrient removal : Nitrification, denitrification and biological phosphorus removal.
Pesticide removal : none
Disinfection : Chlorination
Suspended solids removal : Aeration and secondary treatment with sedimentation
The plant was designed initially for a population equivalent of 10,860 with a maximum treatment capacity is 40,000 population equivalent. The population in summer increases of 100%.
The plant has following characteristics:
Total incoming load (Kg BOD5/d): mean annual: 2,800 max annual: 3,200
Incoming sewage load (Kg BOD5 /d): mean annual: 2,000 max annual: 2,400
Inlet load sewage sludge (Kg BOD5/d): mean annual: 800, max annual: 800
Total incoming flow to treatment plant (m3/d): mean annual: 50, max annual: 600
Extent of the agricultural beneficiaries
The extent of the agricultural land which benefits from the reclaimed water is 120 hectares.
The cost of reclaimed water is estimated at 0.6 euro /m3.
Type of agreement
The Wastewater Treatment Plant of Asprovalta is owned and operated by the Water and Sewer Municipal Company of Volvi. The owner has the responsibility of reclaimed water distribution works