Procedure - Organic Fouling Solution - ProMinent DULCOMETER PH-501 Assembly And Operating Instructions Manual

2) If backwash tank TNK-801 is full:
a. Disable membrane by holding down the disable membrane button for about 5
seconds
b. Turn SV-801 solenoid valves to off ("O")
c. Turn MV-701/702 (depending on the membranes to be cleaned) motorized valves
to hand ("H")
d. Turn pump P-801 to hand ("H") until the backwash tank has drained to the required
volume for chemical backwash (3L per cassette X 20 cassettes per module = 60
L OR approx. 1/4 capacity of TNK-801) – the exact volume can be determined by
backwash tank level drop. Note TNK-801 capacity is 272L.
e. Turn P-801 to off ("O")
7.3.1.2 Procedure – Organic Fouling Solution
Organic Fouling - NaOCl: 500 mg/L solution (acceptable range of 200 to 1000 mg/L). Used for
removal of organic fouling, which is the most common type of fouling in MBRs.
Volume of concentrated NaOCI required can be calculated with the following
formula,
V
m
V
x
C
: Volume of the solution (Gallon, or Litre), equal to 3 L multiplying the number of MCXL
cassettes 20 (60L per module);
: Concentrated NaOCI concentration (%)
: Volume of concentrated NaOCI required (Gallon, or Litre)
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