Procedure for Dosing of Anti-Scalant in Water Treatment Plant

Procedure for Dosing of Anti-Scalant in Water Treatment Plant

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1.0) OBJECTIVE:

To describe a procedure for dosing of Anti-Scalant  in Water Treatment Plant.

2.0) SCOPE:

This SOP is applicable for dosing of Anti-Scalant  in Water Treatment Plant

3.0) RESPONSIBILITY:

Assistant Engineer/Above shall be responsible for implementation and compliance of this SOP.

4.0) ACCOUNTABILITY:

Manager – Engineering/ Manager – Production/ Head-QA shall be accountable for implementation and compliance of this SOP.

5.0      ATTACHMENTS:

Dosing of Anti-Scalant in water treatment plant                                       -Attachment-I

6.0)  PROCEDURE:

          Anti-Scalant Dosing System :  

Scaling means the deposition of particles on a membrane, causing it to plug. Without some means of

scale inhibition, reverse osmosis (RO) membranes and flow passages within membrane

elements will scale due to precipitation of   calcium carbonate, bicarbonates etc.

Anti Scaling dosing is done to remove or avoid the scaling in RO membranes.

  •     Chemical to be used is Anti Scalant and dosage required is 5.0 to 10 ppm.
  •     Calculation for 10 ppm Anti-Scalant dosing :

Dosing Chemical rate (Ltrs /day)

=  ppm solution X Flow rate ( m3/hr) X Operating hours / 1000

=10X2X10 / 1000

=0.2Ltr/day

=200ml/day

  •     Now fix dosing rate, say typically 4 LPH.
  •     Dosing pump shall dose 4 x 10 (Operating hours) = 40Ltrs liquid per day.

Now take 0.2ml Anti-Scalant and rest water(40-0.2)=39.8ltr) in dosing tank to

prepare the fresh solution for the day.

  •    Set and start dosing pump flow rate at 4 LPH.

Above calculation is typical example; however dosing rate, calculation and concentration may vary as per requirement. Also flow                  regulating knob is available on dosing pump to maintain flow rate  and concentration of dosing chemical in line.

Operator will record the activity in respective attachment of SOP .

7.0        REFERENCES:

 In-house

8.0    ABBREVIATIONS:

ppm     :Parts per million.

LPH    :Litres per hour.

Kg       :Kilogram.

RO      :Reverse Osmosis.

m³/hr    :Cubic meter per hour.

9.0    DISTRIBUTION LIST:

Quality Assurance

Production

Engineering

10.0    HISTORY OF REVISION:

Version No.
 Effective Date Reason for Revision

            Attachment-I

ANTI-SCALANT CONSUMPTIONS / STOCK

Dated Name of Chemical Initial Stock Receipt Consumption Final

Stock

 Sign.

SOPs