OPERATION OF PURIFIED WATER SYSTEM (ULTRA FILTRATION)

1.0    PURPOSE :

To describe a standard operating procedure for Operation of purified water system (Ultra filtration).
    
2.0    SCOPE:

The standard operating procedure describes in detail the method of operation of purified water system (Ultra filtration) to produce purified water. 
    
3.0    RESPONSIBILITY:

    The  responsibility  of operation of  purified water system to produce purified water lies with the staff  of  rank  not  lower than the utility operator of maintenance  department.

    The responsibility of preparing, reviewing and approving  the  standard   operating procedure lies  with  the Executive- Maintenance, Manager- Maintenance, Head of Production  and Head of QAD respectively.

4.0    METHOD:

4.1    The flow diagram of purification water system (Ultra filtration) to produce purified water is shown in the diagram in Annexure-II.

4.2    Ensure that the level of the D.M. Water storage tank tag No. T-01 is healthy.

4.3    Open UF feed pump (P-02A) suction valve V-03 and discharge valve V-04. 

4.4    Open the UF fast flush pump (P-02B) suction valve V-06 and discharge valve 
V-07.

4.5    Open the valve V-20 fully at inlet of Ultra filtration membranes (UF-01A & 01B).

4.6    Switch on the mains of the Ultra filtration system panel board.

4.7    Turn the motary switch into Auto mode.

4.8    Ensure that all the parameters and set points of the system are correct from the MMI prior to start up the system.

4.9    Ensure that the permeate line pneumatically controlled valve XV-03 is open (normally open).

4.10    Ensure that the pneumatically controlled fast flush drain valve XV-02 and recirculation line valve to tank (T-01) XV-04 are closed (normally closed).

4.11    Push the sequence start button to switch on the PLC sequence operation.

4.12    UF feed pump P-02A starts automatically through PLC and DM water shall pass through Rota meter (RM-01) and Ultra filtration membranes (UF-01A&01B).
    
4.13    Adjust feed flow rate in the range 2.0 to 2.1 m3/hr by using valve V-04 through feed Rota meter (RM-02) and the reject water flow rate 0.1 to 0.2 m3/hr by using valve V-10 through reject Rota meter (RM-02). 

    
4.14    Purified water shall be collected into purified water storage tank ( T-02).

4.15    PLC shall monitor the conductivity of purified water generated. Online, at the outlet of permeate, temperature of purified water in the purified water storage tank (T-02) and level of the purified water in the purified water storage tank (T-02). All the parameters shall be displayed on MMI.

4.16    If the conductivity of permeate water more than the set point hooter turn on till the conductivity return to the below set point.  This continues for 5 minutes and then PLC will trip the system completely by indicating the fault on MMI display.

4.17    Whenever the purified water tank level reaches 80% the permeate line pneumatically controlled valve XV-03 closes and the recirculation line pneumatically controlled valve XV-04 will be opened automatically through PLC. The UF feed pump remains in running condition and the permeate water circulates through DM water storage tank (T-01) and its loop. 

4.18    Whenever the purified water storage tank level comes down to 50% permeate line pneumatically controlled valve XV-03 opens and recirculation line pneumatically controlled valve XV-04 shall be closed automatically by PLC till the purified water storage tank level reaches to 80% level.
    
4.19    For every one hour operation of Ultra filtration system, the UF feed pump (P-02A) stops, UF fast flush pump (P-02B) will turn on and fast flush drain pneumatically controlled valve XV-02 shall be opened for one minute for fast flushing of UF membranes automatically by PLC.
    
4.20    Purified water batch No. shall be given for every 24 hours of operation as PW/YY/XXX.

Where         PW    -    Stands for Purified water.
        YY    -    Stands for Current financial year 
        XXX    -    Corresponding DM water batch number.

4.21    Drain the previous batch purified water from the purified storage tank (T-02) and from user points (SP7 to SP21) prior to collection of current batch purified water.
 
4.22    Record the UF feed pump pressure, UF fast flush pump pressure, Rota meter readings, Purified water conductivity, Level, Temperature, Purified water Loop pump pressure in Annexure-I.

6.0    RECORDING:

    The responsibility of recording the operation of Ultra filtration system to produce purified water lies with the staff of rank not lower than utility operator of maintenance  department as shown in Annexure-I.

Ultra filtration, engineering, operation, purified storage tank