Key responses water water treatment and priorities in different settings
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WASH Cholera / AWD EP&R training. Session 3.2. Key responses – Water Water treatment and Priorities in Different Settings. Learning Objectives. By the end of the session the participants specify water treatment during a cholera / AWD outbreak

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Key responses – Water Water treatment and Priorities in Different Settings

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Key responses water water treatment and priorities in different settings

WASH Cholera / AWD EP&R training

Session 3.2

Key responses – Water

Water treatment and Priorities in Different Settings

WASH cholera / AWD EP&R training


Learning objectives

Learning Objectives

By the end of the session the participants

  • specify water treatment during a cholera / AWD outbreak

  • describe basic principles of chlorination, its limitations and advantages

  • suggest solutions to provision of water for different settings at different stages of cholera / AWD response

WASH cholera / AWD EP&R training


Important

IMPORTANT

During a cholera outbreak it is

advisable to use chlorinated water

only for drinking and cooking!!!

WASH cholera / AWD EP&R training


Bulk vs household water treatment

Bulk vs. household water treatment

  • .

WASH cholera / AWD EP&R training


Work in pairs

Work in pairs

Discuss advantages and

disadvantages of household and bulk

water treatment

10 min

WASH cholera / AWD EP&R training


Bulk vs household treatment

Bulk vs. household treatment

WASH cholera / AWD EP&R training


Water treatment chlorination

Water Treatment Chlorination

Most common water treatment is

chlorination because…..

  • It is easy to use and monitor

  • it is readily available

  • It has a residual effect

  • It is effective against most pathogens

WASH cholera / AWD EP&R training


Chlorination limitation

Chlorination Limitation

  • Chlorination works most effectively with low turbidity <5 NTU (max 20 NTU)

  • Chlorination will require 30 minutes contact time under the conditions that:

    • pH<8

    • turbidity <5 NTU

    • temperature approx 20oC

  • If pH higher, temp lower, turbidity higher then processes need to be adjusted

WASH cholera / AWD EP&R training


Key responses water water treatment and priorities in different settings

WASH cholera / AWD EP&R training


Handling storage of chlorine

Handling & Storage of Chlorine

  • Metal consumes chlorine - do not store chlorine solutions in metallic containers

  • When in contact with air and especially humidity, HTH, chlorinated lime and NaDCC produce corrosive and toxic chlorine gas heavier than air. Stores should be ventilated at the bottom of the walls.

  • Both powdered and liquid forms of chlorine reduce in strength over time. Store dry chlorine in sealed containers, away from heat & out of sunlight and keep liquid solutions in dark coloured bottles.

  • Chlorine in corrosive – handle with care, avoid skin contact and when mixing chlorine solution, wear protective clothes and gloves, protect eyes and do not inhale fumes. In case of contact, rinse thoroughly with water.

WASH cholera / AWD EP&R training


Chlorination important points

Chlorination – important points

  • Training & on-going monitoring – check correct use regularly

  • Care when agencies using different makes - different instructions, package size and strengths

  • Check instructions – they can vary even for same product

  • Turbidity & type of water affects use – test samples & residuals before distribution

  • Work closely with hygiene promotion staff - ensure effective communication (e.g. why used, how used, taste) with users, training and support

WASH cholera / AWD EP&R training


Bucket chlorination

Bucket Chlorination

Picture MSF

WASH cholera / AWD EP&R training


Bucket chlorination1

Bucket Chlorination

Water is treated with chlorine generating product at water

source at each individual water container

There are some issues you need to consider…….

  • Different sizes of water containers need different dose

  • Requires recruitment, training and close support supervision of “chlorinators”

  • Could be expensive if there are many water points to cover

  • Short term solution only

  • Effective and fast method if properly implemented

WASH cholera / AWD EP&R training


Exercise

Exercise

Calculate how much HTH (70%) active

chlorine you will need to make 1 litre of 1%

solution.

WASH cholera / AWD EP&R training


Answer exercise

Answer Exercise

PREPARATION OF A 1% SOLUTION

  • 1% chlorine solution contains 10g of active chlorine per litre

  • HTH is not 100% active chlorine but 70%

    Calculation: calcium hypochlorite (HTH) at

    70% active chlorine : 10 x (100/70) = 14.2 g

    (which is about 14 g / l of solution)

WASH cholera / AWD EP&R training


Instructions for group work

Instructions for group work

In your groups discuss what would be your water priorities

in this setting during the

  • First two weeks of a cholera / AWD outbreak response

  • After first two weeks up to 2 months

  • Beyond 2 months

    Time 25 min

    Make notes on your handouts. Choose who will to present

    your priorities in plenary

WASH cholera / AWD EP&R training


Nomadic communities

Nomadic communities

WASH cholera / AWD EP&R training


Rural area spring

Rural area - spring

WASH cholera / AWD EP&R training


Peri urban area

Peri Urban area

WASH cholera / AWD EP&R training


Urban formal setting with broken infrastructure

Urban formal setting with broken infrastructure

WASH cholera / AWD EP&R training


Established idp camp

Established IDP Camp

WASH cholera / AWD EP&R training


New idp camp

New IDP camp

WASH cholera / AWD EP&R training


Rural setting open wells

Rural setting - open wells

WASH cholera / AWD EP&R training


Urban informal settings

Urban informal settings

WASH cholera / AWD EP&R training


Learning objectives1

Learning Objectives

By the end of the session the participants

  • specify water treatment during a cholera / AWD outbreak

  • describe basic principles of chlorination, its limitations and advantages

  • suggest solutions to provision of water for different settings at different stages of cholera / AWD response

WASH cholera / AWD EP&R training


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