Chlorination & sanitization of chlorine dosing tank

Objective

• To lay down a procedure of Chlorination & sanitization of chlorine dosing tank.

Scope

• This SOP is applicable for the chlorination process and sanitization of the chlorine dosing tank in the formulation plant.

Responsibility

• Operator / Technician shall be responsible for chlorination and chemical sanitization of chlorine dosing tank.
• Engineering personnel shall be responsible for checking the chlorination & sanitization.

Accountability

• Department Head & QA Head shall be accountable for the implementation of this SOP.

Abbreviations and Definitions

• QA:            Quality Assurance
• SOP:            Standard Operating Procedure
• QC:           Quality Control

Procedure

Chlorination:

• Chlorination shall be done by 6.0% w/v sodium hypochlorite solution.
• Take 45 liters of fresh raw water in a dosing tank.
• Prepare the sodium hypochlorite solution having a concentration of 6.0 % w/v.
• Add 5 liter of prepared sodium hypochlorite solution into the dosing tank and stir with S.S. ladle to form a uniform solution.
• Maintain the free chlorine level is about 2 ppm by adjusting the dosing rate.
• After chlorination, the sampling valve of the sampling point shall open and water shall be drained for at least five minutes.
• Water sample shall be taken by the operator from sampling point no. and this sample shall be sent to QC to check the free chlorine level in the water.
• Sodium hypochlorite solution preparation & consumption record shall be maintained as per annexure-I
• Frequency: Daily

Sanitization

• Drain the content of the dosing tank.
• Clean with raw water.
• Take 50 liters of potable water in the dosing tank.
• Add 50 ml of sodium hypochlorite solution (6% w/v concentration- Approx.) in the dosing tank & stir with the help of S.S ladle.
• Remove the dosing pump tubing from the dosing line & put it into the dosing tank and run the dosing pump for 30 to 60 minutes.
• Keep the tank filled with sodium hypochlorite solution for 4 hours.
• Clean the tank with potable water having 1-2 ppm of available chlorine.
• After completion of cleaning, the tank is ready to use.
• Sanitization of chlorine dosing tank shall be planned in a holiday to avoid the shortage of water.
• Sanitization record shall be maintained
• Frequency: Monthly

Forms and Records (Annexures)

• Sodium Hypochlorite Solution Preparation & consumption Record –        Annexure-I
• Sanitization of Chlorine Dosing Tank                                        –        Annexure-II

Distribution

• Master copy        –             Quality Assurance
• Controlled copies –             Quality Assurance & Engineering

History

Annexure-I

Sodium Hypochlorite Solution Preparation & Consumption Record

Annexure-II

Sanitization of Chlorine Dosing Tank