Operation and Maintenance
Projects Portfolio Sample
OPERATION AND MAINTENANCE OF WASTE WATER TREATMENT INSTALLATIONS OF THE MUNICIPALITY OF DION-OLYMPOS
Contracting Authority: Municipality of Diosn-Olympos
Contractor: KARKANIAS S.A.
The Waste Water Treatment Plant for the Municipalities and Communities located in South Pieria is constructed at the area “Xiroziliano-Diodia” to the west of the National Road Katerini – Larissa, an area of 68 acres which is sufficient for the needs of the year 2040. The sewage treatment units are constructed at a special field approximately 250 m from the main site of the plant.
The capacity of the project is the following:
- Population Equivalent: 150.000 residents
- Daily Wastewater flow: 21.000m3/d
- Sewage flow: 576m3/d
- Organic Loading BOD5: 4.134Kg/d
- Suspended solids: 5.706 kg/d
OPERATION AND MAINTENANCE OF WASTE WATER TREATMENT INSTALLATIONS OF LIANOKLADI-YPATI
Contracting Authority: D.E.Y.A. (Public Utility of Water Suppl and Sewage) of Lamia
Contractor: KARKANIAS S.A.
The treatment method applied in the Plant consists of the activated sludge system with extended aeration and simultaneous stabilization of the sludge, biological removal of nitrogen (nitrification-denitrification), as well as biological and chemical removal of phosphorus. In addition, the Plant also included a tertiary treatment unit for the filtration and disinfection of the treated waste water (chlorination-dichlorination), while the excess sludge (mechanical thickening – dewatering) is treated by a decanted.
According to the technical description including in the Bidding Documentation, the Plant’s capacity is as follows:
- Population Equivalent: 10.000 residents
- Waste Water flow: 2.160 m3/d
OPERATION AND MAINTENANCE OF WASTE WATER TREATMENT PLANT INSTALLATIONS OF FARSALA MUNICIPALITY
Contracting Authority: D.E.Y.A. (Public Utility of Water Suppl and Sewage) of Farsala
Contractor: KARKANIAS S.A.
The Waste Water Treatment plant processes sewage and sludge of the Municipality of Farsala with secondary biological treatment in prolonged ventilation conditions with simultaneous stabilization of the sludge, as well as biological removal of nitrogen (nitrification-denitrification). This is followed by the disinfection (chlorination and dechlorination) of the treated sewage. For the treatment (thickening-dehydration) of excess sludge, a mechanical assembly of fattening bank and filter press has been installed.
According to the technical description including in the Bidding Documentation, the Plant’s capacity is as follows:
- Population Equivalent: 16.000 residents
- Waste water flow: 4.300 m3/d
- Sewage flow: 50 m3/d
- Organic flow BOD5: 900 kg/d
- Suspended incoming solids: 960 kg/d
- Total Nitrogen: 125 kg/d
- Total Phosphorus: 40 kg/d
ADMINISTRATION, OPERATION AND MAINTENANCE OF WASTE WATER TREATMENT INSTALLATIONS OF THE INDUSTRIAL AREA OF LARISA
Contracting Authority: ETVA VIPE S.A.
Contractor: KARKANIAS S.A.
The scope of each contract regarding the Administration, Operation and Maintenance of the Waste Water Treatment Installations of the Industrial Area of Larisa, is the uninterrupted operation of the Plant and its maintenance in a high operational condition in order to achieve the limits in the outflow of treated wastewater, provided by the project study with an Average daily flow rate of 2. 000,00 m3/day.
The tasks include:
- Monitoring – operation and maintenance of the unit by the contractor’s staff.
- Maintenance and control of the equipment.
- Operation of electromechanical works with a medium voltage substation supporting the units of the facility.
- Control of the installed automation system.
- Operation and maintenance of the chemical laboratory to carry out the necessary on-site laboratory tests and analyses.
