PREPARATION OF SODIUM HYPOCHLORITE, SMBS, ANTISCALENT AND SODIUM HYDROXIDE SOLUTIONS

• OBJECTIVE:

To lay down a procedure for chemical preparation of the Sodium hypochlorite, SMBS, Anti scalent & Sodium Hydroxide solutions.

• SCOPE:

This SOP is applicable for chemical preparation of the Sodium hypochlorite, SMBS, Anti scalent & Sodium Hydroxide solutions at {Company Name} {Company Location}.

• RESPONSIBILITY:

• Technical Assistant – Engineering is responsible for follow the procedure.

• Executive– Engineering is responsible to ensure the compliance as per SOP.

• ACCOUNTABILITY:

Engineering Head

Head Quality Assurance

• PROCEDURE:

•     CONSUMPTION OF SODIUM HYPO CHLORITE SOLUTION PER DAY:

Total consumption of water per day = Flow rate (m³ /hr) x working hours

           For e.g. Hypo chlorite dosing for 3 PPM

Total consumption of water per day = Flow rate (m³ /hr) x working hours

= 2.5 x 24

= 60 KL (Approx.) Required

Hypo chlorite dosing                     = 3 ppm

Available Hypo chlorite dosing    = 11 % ( w/v chlorine)

• PREPARATION OF SODIUM HYPOCHLORITE SOLUTION.

• Take 1.6 liters of Sodium Hypo chlorite having 11% w/v of chlorine in dosing tank and add 50 liters of purified water and mix it properly by SS rod.
• The dosing pump also interlocked with raw water tank and each time it shall be pumped 1.2 liters of solution. Dosing pump put in 1.2 Lts/ hr by adjusting the fine tuning the knob.
• Prepare the solution one time for 24 hours. Use freshly prepared solution every day.
• PREPARATION OF SMBS SOLUTION:

• Chemical calculation:

For e.g. SMBS dosing for

Flow rate per hour                         =         2.0 m³/hr

Running hours per day                  =         24 Hours

Required SMBS dosing                =         6 ppm

Quantity of SMBS per day            =         Flow rate (m³/hr) x ppm x 24

=         2.0 x 6 x 24

=         288 grams

=         300 grams (Approx.)

• Take 300 grams of SMBS powder in the dosing tank and add 50 liters of purified water and dissolve it completely by SS rod.

• Ensure that 24 hours of working and dosing 1.2 liters per hour by adjusting the dosing pump provided for tuning the knob.

• Prepare the solution one time for 24 hours. Use freshly prepared solution every day.

•    PREPARATION OF ANTI SCALENT SOLUTION:

• Chemical calculation:

For e.g. if Antiscalent dosing for 5 ppm

Flow rate per hour                         =         2.0 m³/hr

Running hours per day                  =         24 Hours Required Antiscalent dosing                        =         5 ppm

Quantity of Antiscalent per day    =         Flow rate (m³/hr) x ppm x 24

=         2.0 x 5 x 24

=         240 grams.

=         250 (Approx.)

• Take 250 grams of Antiscalent in the dosing tank and add 50 liters of purified water and mix it properly by SS rod.
• Ensure that 24 hours of working and dosing 1.2 liters per hour by adjusting the dosing pump provided for tuning the knob.

• Prepare the solution one time for 24 hours. Use always freshly prepared solution every day.

• PREPARATION OF NAOH SOLUTION FOR pH CORRECTION

•   Chemical calculation:

For e.g.

Quantity of NaOH per day            =         Flow rate (m³/hr) x ppm x 24

=         2.2 x 6 x 24

=         316 grams

=         350 (Approx.)

• Take 350 grams of NAOH in the dosing tank and add 50 liters of water of purified water and mix it properly by SS rod.

• Ensure the 24 hours of working and dosing 6.3 liters per hour by adjusting the dosing pump provided for tuning the knob.

• Prepare the solution one time for 24 hours. Use freshly prepared solution every day.

•  PREPARATION OF NAOH SOLUTION FOR pH CORRECTION UV OUTLET

• Chemical calculation:

   For e.g.

 Quantity of NaOH per day           =         Flow rate (m³/hr) x ppm x 24

=         0.73 x 6 x 24

=         105 grams

=         100 grams. (Approx.)

• Take 100 grams of NAOH in the dosing tank and add 50 liters of water of purified water and mix it properly by SS rod.

• Ensure the 24 hours of working and dosing 1.2 liters per hour by adjusting the dosing pump provided for tuning the knob.

• Prepare the solution one time for 24 hours. Use freshly prepared solution every day. Record the solution details as per Annexure-I.

•   PREPARATION OF SODIUM HYPO CHLORITE SOLUTION (FOR UF PERMEATE TANK)

• Chemical calculation:

For e.g.

Total consumption of water per day   = Flow rate (m³ /hr) x working hours

= 1.5 x 24

= 36 KL (Approx.) Required Hypo chlorite dosing                               = 3 ppm

Available Hypo chlorite dosing     = 11 %( w/v chlorine)

• Take 1 liter of Sodium Hypo chlorite having 11% w/v of chlorine in dosing tank and add 50 liters of purified water and mix it properly by SS rod.

• The dosing pump also interlocked to the RO-I product water recirculation line to Pre UF permeate tank and each time it shall be pumped 1.2 liters of solution.

• Prepare the solution one time for 24 hours. Use freshly prepared solution every day. Record the solution details as per Annexure –I.

• REFERENCES:

  Not Applicable

• ANNEXURES: 

ANNEXURE No.	TITLE OF ANNEXURE
Annexure-I	Solution Preparation Record.

ENCLOSURES: SOP Training Record.

• DISTRIBUTION:

• Controlled Copy No. 01                     Head Quality Assurance
• Controlled Copy No. 02                 Head-Engineering
• Master Copy                           Quality Assurance Department

• ABBREVIATIONS:

PPM                       :          Parts per million

SMBS                    :          Sodium meta bi Sulphite

NaOH                    :          Sodium hydroxide

KL                         :          Kilo liter

SS                          :          Stainless Steel

NaOCl                   :          Sodium Hypochlorite

w/v                         :          Weight / Volume

• REVISION HISTORY:

                                                             CHANGE HISTORY LOG

Revision No.	Details of Changes	Reason for Change	Effective Date
00	New SOP	Not Applicable	To be written manual

ANNEXURE-I
SOLUTION PREPARATION RECORD