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b.stev How potable H 2 O is produced
The Resource Management Act 1991 LOCAL AUTHORITIES control & regulate the drinking water supplies ,  Ensuring safe water is delivered to our homes. The DEPARTMENTS work together closely to provide this . ( Govt NZ, 2008) H 2 O in NZ that is utilised in homes  is monitored in accordance with:
Ministry of Environment & the Regional Council monitor the source of H 2 O [Rivers & Groundwater] Resource Management Act 1991   stipulates the tools needed to ensure this supply . The ,”Council Officers,”  are responsible to the position (Govt NZ, 2008)
Ministry of Health H 2 O treated under the law of the: Health Amendment Bill of Drinking Water The ,”Drinking Water Assessors,”  are responsible The Building Act   Building Inspectors:  responsible to   the tap (Govt NZ, 2008)
Discussion: Outline the Treatment  Process of POTABLE  H 2 O Includes:  sedimentation  coagulaton filtration disinfection storage  reticulation
treatment begins by  sedimentation H 2 O is collected in a large tank, the SOILDS in H 2 O settle by gravity
Particles smaller than 0.1um remain in motion due to  ELECTROSTATIC   CHARGE . This charge  ALSO  causes these small particles to repel each other.
A   coagulant   chemical  is added  that neutralises the water.  The particles then  agglomerate & also then settle - these bigger particles are called ,”FLOCS”
Often used in smaller plants Mixed gently to prevent molecular breakage FILTER AID POLYMERS,  0.1mg/L ,  added to lengthen filter run times CHEMICLALS USED Aluminium sulphate Polyaluminium chloride MOST COMMON Usually dosed at >1mg/L Ferric chloride  Ferric sulphate
H 2 O is  THEN  filtered,  It removes particles – to the size of:  0.035 microns . It catches almost  ALL   bacteria
Often used ,” sand filtering ,” ie:  MASTERTON’S TOWN SUPPLY -  utilises this process & then  the H 2 O is covered in a pond NZ’s newest,“ ultrafiltration ,” plant  is located in the WAIKATO REGION. Filters:  75  million litres per day (International NZ, 2008) (Masterton District Council, 2008)
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Before delivery along:   reticulation system   H 2 O  is disinfected to remove the  BACTERIA
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Chlorine is :
ALSO :   extracts  hydrogen sulfide, ammonia & nitrogen compounds that cause unpleasant taste. Stops:   moulds slime bacteria  algae  that grow on the walls of pipes & storage tanks
A  local  DAM or TANK :  holds MILLIONS of Litres.  Household’s are supplied from this, via the use of a reticulation system (network of pipes & junctions)
:is a system of  PIPES  that carries H 2 O to the house/s Treated H 2 O is  passed through an  extensive   network   of   pipes .
30%   saving   of  supply H 2 O  can be achieved with the instalment of  tanks (on site)  to   collect rainwater &  GREYWATER   (sinks/ laundry& bathroom) SAVING the WATER SUPPLY
IN DOING THIS:   Residents obtain a more  consistant and regular supply as the peak demand can be satisfied THE AIM: less than < 1000L per day (For each house on town supply)
Bibliography Masterton District Council. (2008).  Water treatment and supply-masterton  district council . Retrieved September 15, 2008, from  http//:  www.mstn . govt.nz/services/ water /index.php International NZ. (2008).  Waikato water treatment plant . Retrieved September 15, 2008, from  http//:  www.ch2m.com/corporate/worldwide/assests/ ProjectPortfolio/australia/ Waikato .pdf New Zealand. Govt NZ. (2008).  Resource Management Act [Ministry for the Environment] . Retrieved September 15, 2008, from  http ://www.mfe.govt.nz/rma/index.php

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How potable H20 is produced

  • 1. b.stev How potable H 2 O is produced
  • 2. The Resource Management Act 1991 LOCAL AUTHORITIES control & regulate the drinking water supplies , Ensuring safe water is delivered to our homes. The DEPARTMENTS work together closely to provide this . ( Govt NZ, 2008) H 2 O in NZ that is utilised in homes is monitored in accordance with:
  • 3. Ministry of Environment & the Regional Council monitor the source of H 2 O [Rivers & Groundwater] Resource Management Act 1991 stipulates the tools needed to ensure this supply . The ,”Council Officers,” are responsible to the position (Govt NZ, 2008)
  • 4. Ministry of Health H 2 O treated under the law of the: Health Amendment Bill of Drinking Water The ,”Drinking Water Assessors,” are responsible The Building Act Building Inspectors: responsible to the tap (Govt NZ, 2008)
  • 5. Discussion: Outline the Treatment Process of POTABLE H 2 O Includes: sedimentation coagulaton filtration disinfection storage reticulation
  • 6. treatment begins by sedimentation H 2 O is collected in a large tank, the SOILDS in H 2 O settle by gravity
  • 7. Particles smaller than 0.1um remain in motion due to ELECTROSTATIC CHARGE . This charge ALSO causes these small particles to repel each other.
  • 8. A coagulant chemical is added that neutralises the water. The particles then agglomerate & also then settle - these bigger particles are called ,”FLOCS”
  • 9. Often used in smaller plants Mixed gently to prevent molecular breakage FILTER AID POLYMERS, 0.1mg/L , added to lengthen filter run times CHEMICLALS USED Aluminium sulphate Polyaluminium chloride MOST COMMON Usually dosed at >1mg/L Ferric chloride Ferric sulphate
  • 10. H 2 O is THEN filtered, It removes particles – to the size of: 0.035 microns . It catches almost ALL bacteria
  • 11. Often used ,” sand filtering ,” ie: MASTERTON’S TOWN SUPPLY - utilises this process & then the H 2 O is covered in a pond NZ’s newest,“ ultrafiltration ,” plant is located in the WAIKATO REGION. Filters: 75 million litres per day (International NZ, 2008) (Masterton District Council, 2008)
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  • 14. ALSO : extracts hydrogen sulfide, ammonia & nitrogen compounds that cause unpleasant taste. Stops: moulds slime bacteria algae that grow on the walls of pipes & storage tanks
  • 15. A local DAM or TANK : holds MILLIONS of Litres. Household’s are supplied from this, via the use of a reticulation system (network of pipes & junctions)
  • 16. :is a system of PIPES that carries H 2 O to the house/s Treated H 2 O is passed through an extensive network of pipes .
  • 17. 30% saving of supply H 2 O can be achieved with the instalment of tanks (on site) to collect rainwater & GREYWATER (sinks/ laundry& bathroom) SAVING the WATER SUPPLY
  • 18. IN DOING THIS: Residents obtain a more consistant and regular supply as the peak demand can be satisfied THE AIM: less than < 1000L per day (For each house on town supply)
  • 19. Bibliography Masterton District Council. (2008). Water treatment and supply-masterton district council . Retrieved September 15, 2008, from http//: www.mstn . govt.nz/services/ water /index.php International NZ. (2008). Waikato water treatment plant . Retrieved September 15, 2008, from http//: www.ch2m.com/corporate/worldwide/assests/ ProjectPortfolio/australia/ Waikato .pdf New Zealand. Govt NZ. (2008). Resource Management Act [Ministry for the Environment] . Retrieved September 15, 2008, from http ://www.mfe.govt.nz/rma/index.php