Recycle Of Waste Water and Waste Management

Recycle Of Waste Water and Waste Management
Recycle Of Waste Water and Waste Management

Recycle Of Waste Water and Waste Management

Why waste recycling

  • Prevents emissions of greenhouse gasses & water pollutants
  • Minimization of pollution
  • Volume reduction
  • Sanitation of waste (composting)
  • Stabilization of biodegradable compounds
  • Supplies valuable raw materials to industry
  • Stimulates development of greener technologies and Reduce the need for new land fills and incinerators.
  • Value addition to the waste

    Recycle Of Waste Water and Waste Management
    Recycle Of Waste Water and Waste Management

Water Recycling

GOAL

  • IMPROVEMENT OF HEALTH
  • CAPTURING VALUABLE PRODUCTS (NITROGEN & PHOSPHORUS)
  • EFFICIENT USE OF WATER

Category Of Wastewater Reuse

  • Grey Water Reuse
  • Reuse of effluent from wastewater treatment plants
  • Reuse of Industrial Process Water

Reuse Of Industrial Process Water

BENEFITS

  • Potential reduction in production costs from recovery of raw materials in the wastewater
  • Less permitting and administrative burden from the reduction in wastewater toxicity and volume
  • Heat recovery and reduced impacts from high temperature effluent to the ecosystem

APPLICATIONS OF TREATED WATER

  • AGRICULTURAL IRRIGATION
  • ┬žURBAN/RESIDENTIAL RECYCLING
  • GROUND WATER RECHARGE
  • INDUSTRIAL ACTIVITIES
  • AQUA-CULTURE
  • POTABLE WATER

AGRICULTURAL IRRIGATION

Important factors to be considered-

  • Salinity of water
  • Water infiltration rate of soil
  • Evapotranspiration rate
  • Nutrients
  • Soil property

URBAN/RESIDENTIAL RECYCLING

  • Wastewater can be excellent for municipal landscape watering of gardens or grassed areas.
  • It contains nutrients essential for plant growth and can be used in public areas – subject to simple precautions – as an alternative to discharge into nutrient-sensitive waterways.
  • Other uses may be for watering of golf courses, racecourses, aerodromes or for dust suppression on roads and sewer flushing.
  • It could also provide added capacity for emergency fire fighting.

GROUND WATER RECHARGE

Uses

  • Reduce,stop or reverse the declining ground water level,
  • Protect underground freshwater in coastal aquifers against salt water intrusion from sea,
  • Store surface water including flood or other surplus water for future use

POTABLE WATER

Generally raw sewage contains-

  • BOD- 300 mg/l
  • COD- 500 mg/l
  • Organic matter
  • Heavy metal
  • Toxic compounds
  • Pathogenic bacteria etc.

Treatment of sewage to potable water means removal of harmful components and decrease of BOD to less than 2 mg/l.Singapore has developed such a treatment process to revive potable water (RECLAIMED WATER) from secondary effluent of STP.

QUALITY OF RECLAIMED WATER

Key factors effecting on-site waste Management

Recycling

Energy Recovery

 

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