General Operation & Maintenance, Sampling Procedures And Frequency - ProMinent DULCOMETER PH-501 Assembly And Operating Instructions Manual

Table 5: STP treated water quality operational target
Parameters
pH
Oil, Grease
Biological Oxygen Demand (BOD)
Total Suspended Solids (TSS)
Total Kjeldahl Nitrogen (TKN)
Unionized Ammonia Nitrogen (NH3-N)
Nitrate Nitrogen (NO3-N)
Total Phosphorus (TP)
Fecal Coliform
Total Residual Chlorine
3.11 GENERAL OPERATION & MAINTENANCE, SAMPLING PROCEDURES AND
FREQUENCY
To ensure efficiency of STP, samples of water must be collected periodically. Table 6 presents sampling
schedule to assess that STP performance comply with operational target values.
More samples can be taken at different locations in the plant to assess any default on STP operation.
Visual inspection is also important to verify STP operation. The following sign must be reported as soon
as possible:
Plant Visual Checks Noise
During normal operation, there is a uniform humming sound at the plant. In case of an unusual
noise, it could be an indication that the blower needs maintenance or repairs
Smell
The MBR is an aerobic system. During normal operation, the system has an earthy smell similar
to that of a well-maintained compost pile. If other odors are noticed, the aeration process may
not be operating or the system has been overloaded. Check the DO manually and the blower
to verify the proper operation.
Effluent Aspect
Normally, the effluent is reasonably clear, colorless, and odorless. If the effluent becomes
turbid, there is a pin hole in the membrane or a leakage in the piping. Take the unit out of
operation and investigate. Check uniformity of membrane air distribution periodically to ensure
air scouring is effective across all membrane plates.
Operation & Maintenance Manual
Sewage Treatment Plant
December 2018
Unit Effluent
s.u. 6.5 – 9.5
mg/L
mg/L
mg/L
mgN/L
mgN/L <1.25
mgN/L
mgP/L
CFU/100 ml
mg/L <0.02
<5
<25
<25
-
<5
<0.5
<200
25