Wastewater Management

The current strict institutional framework, combined with growing social awareness, has created favourable conditions for wastewater management plants investments. Considering the fact that waste contains various polluting and infectious substances, waste management constitutes a necessity. Wastewater management requires an integrated collection and processing system, including sewerage network and drainage system works, waste processing units and sludge management.

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Wastewater management applications concern both residences as well as enterprises that produce waste, companies managing waste and, of course, the local government:

  • In the residential sector, the applications involve small-scale sewage treatment units.
  • Moreover, grey water (wastewater from a house washbasin and kitchen sink, laundry, dishwashing and bathing water), after appropriate purification, can be recycled and reused, e.g. for watering the garden.
  • Larger-scale units serve enterprises and local authorities. Indicatively, in this case, wastewater management involves applications for large plants serving industrial areas (e.g. Waste Water Treatment Plants WWTP) and/or large sized municipalities (e.g. Psittalia Wastewater Treatment Plant).
  • Non-hazardous wastewater can be combined with solid non-hazardous waste or biomass and be used in composting units for the production of compost and/or organic fertilizer (see Composting).

Advantages - Environmental Benefits

  • Wastewater treatment prior to disposal prevents adverse effects to the public recipients, preserves ecological balance and protects the environment.
  • An integrated wastewater management system can save water resources, confront the effects of water shortages and drought, and protect public health.
  • Suitably processed wastewater can be used for irrigation in agriculture, replenishment of groundwater aquifers, urban and suburban uses (water for irrigation of green, woodland and recreation areas, restoration of the natural environment, fire-fighting, cleaning streets and sidewalks), industrial use, and disposal in water bodies.

Institutional Framework

The installation of wastewater management equipment and plants is subject to certain licensing procedures for the equipment installation, the processing procedure, the waste disposal and the use of processed wastewater. The managing body is required to obtain approvals – for some or all of the above mentioned units/processes, on a case-by-case basis. Depending on the type of processing, the size and location of the investment, approval is granted by the Ministry of the Environment, Energy and Climate Change, the Decentralized Administration, or the Region.