treatment options for rainwater harvesting systems

39
Treatment Options for Rainwater Harvesting Systems For more information go to : www.cleanwaterstore.com

Upload: clean-water-systems

Post on 20-Aug-2015

515 views

Category:

Technology


3 download

TRANSCRIPT

Page 1: Treatment options for rainwater harvesting systems

Treatment Options for Rainwater Harvesting Systems

For more information go to: www.cleanwaterstore.com

Page 2: Treatment options for rainwater harvesting systems

Malaysian Rainwater in Abundance

Page 3: Treatment options for rainwater harvesting systems

Rainwater often used for non-potable water applications

Page 4: Treatment options for rainwater harvesting systems

Benefits of Rainwater

Provide water for rural areas

Reduce the dependence and demand of public water supply

Reduction of water bills

Additional water supply for fire protection or emergency use

Reduce land erosion and flooding

Reduce salt accumulation in soil which can be harmful to root growth

Page 5: Treatment options for rainwater harvesting systems

Rainwater quality affected by atmospheric contamination

Carbon dioxide (CO2) levels - affect pH, creating acidic waterPollution from industry - industrial pollution such as sulfur dioxidePollution from agriculture – pesticides and herbicides

Page 6: Treatment options for rainwater harvesting systems

Rainwater quality affected by roof or other catchment surfaces

Page 7: Treatment options for rainwater harvesting systems

Maintaining Roof Water Quality

• Regularly inspect and clean gutters, roof catchments and tank screens.

• Remove overhead branches and clear trees near roof.

• Consider installing gutter screens or guards.

• Ensure tank does not become a mosquito breeding site by preventing access and

cleaning screens regularly.

• Examine tank for accumulation of sludge every year and remove by siphon or by

empting the tank.

• Shock sanitize by adding 40 mm of liquid bleach or 7 grams of granular calcium

hypo-chlorite per 1000 liters of water.

Page 8: Treatment options for rainwater harvesting systems

Basic Rainwater System with manual roof-washer

Page 9: Treatment options for rainwater harvesting systems

Basic Roof Washers

Page 10: Treatment options for rainwater harvesting systems

Commercial Roof Washer Valves

• The roof washer is sized to collect at least 30 liters of water for every 100 sq m of catchment area.

Page 11: Treatment options for rainwater harvesting systems

Commercially Available Roof Washer

Page 12: Treatment options for rainwater harvesting systems

Large capacity rainwater storage tanks

Page 13: Treatment options for rainwater harvesting systems

Polyethylene Tanks

Page 14: Treatment options for rainwater harvesting systems

Polyethylene tanks are light

Page 15: Treatment options for rainwater harvesting systems

Underground Tanks

Page 16: Treatment options for rainwater harvesting systems

Ferro Cement Tank

Page 17: Treatment options for rainwater harvesting systems

Water Quality of Rain Water

Page 18: Treatment options for rainwater harvesting systems

Rainwater Quality Malaysia

Page 19: Treatment options for rainwater harvesting systems

Typical rainwater LSI

Corrosive water can cause heavy-metals such as lead to leach into water from: • Fixtures• Appliances • Water heaters• Brass fixtures• Brass valves

Page 20: Treatment options for rainwater harvesting systems

Copper corrosion from rainwater

Page 21: Treatment options for rainwater harvesting systems

Langelier Index

• pH• Alkalinity• Calcium carbonate • Total dissolved solids• Temperature

Page 22: Treatment options for rainwater harvesting systems

Calcite – Calcium Carbonate

Page 23: Treatment options for rainwater harvesting systems

Calcite pH Neutralizers/Filter Systems

www.cleanwaterstore.com/acid-neutralizer.html

Page 24: Treatment options for rainwater harvesting systems

Neutralizer with UV Sterilizer

Page 25: Treatment options for rainwater harvesting systems

UV Sterilizers

www.cleanwaterstore.com/ultraviolet-sterilizers

Page 26: Treatment options for rainwater harvesting systems

Chlorination

Liquid bleach chlorine feeder

Solid pellet chlorine feeders

http://www.cleanwaterstore.com/chlorinator.html

Page 27: Treatment options for rainwater harvesting systems

Ozone Treatment

http://www.cleanwaterstore.com/ozone-systems.html

Page 28: Treatment options for rainwater harvesting systems

Corona Discharge Ozone Generator with Air Dryer

Page 29: Treatment options for rainwater harvesting systems

Ozone Bubbler with Compressor

Page 30: Treatment options for rainwater harvesting systems

Rainwater Collection Tank with Ozone Bubbler and automatic ORP controller

Page 31: Treatment options for rainwater harvesting systems

Ozone Bubbler in Outside Shed

Page 32: Treatment options for rainwater harvesting systems

Ozone Bubbler in Shed

Page 33: Treatment options for rainwater harvesting systems

Ozone Bubbler With UV and Calcite Carbon Filter System

Page 34: Treatment options for rainwater harvesting systems

Ozone Diagram with Contact Tank

Page 35: Treatment options for rainwater harvesting systems

Ozone Recirculation System with UV and Calcite-Carbon Filtration System

Page 36: Treatment options for rainwater harvesting systems

Automatic Controls

• ORP can be used to control disinfection

Page 37: Treatment options for rainwater harvesting systems

Filtration 50 / 5 Micron

Page 38: Treatment options for rainwater harvesting systems

Filtration 1 Micron

Page 39: Treatment options for rainwater harvesting systems

Ultra-Filtration

www.cleanwaterstore.com/ultra-filtration