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
  • §URBAN/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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