Record Keeping - ProMinent DULCOMETER PH-501 Assembly And Operating Instructions Manual

Microbial/Biological Fouling
Microbial fouling is a result of the formation of biofilms on membrane surfaces. This structure
protects bacterial cells from hydraulic shearing and from chemical attacks of biocides such as
chlorine. Chemical cleaning would be required to restore permeability.
Particulate/Colloid Fouling
This type of fouling may be associated with high concentrations of colloidal solids present in
mixed liquor. In most cases, particles and colloids do not really foul the membrane because
the flux decline caused by their accumulation on the membrane surface is largely reversible by
hydraulic cleaning measures such as backwash and air scouring. However, the accumulation
of solids between the membranes can create increased membrane resistance to permeation
and permanent physical membrane damage.
Inorganic Fouling
Inorganic fouling or precipitative fouling is caused by the accumulation of inorganic precipitates
such as metal hydroxides, and "scales" on membrane surface or within pore structure.
Chemical cleaning will be required in that case.
Organic Fouling
Organic fouling is the attachment of materials such as oil or grease to the membrane surface.
Oil and grease trap will prevent this type of fouling and chemical cleaning is also achievable to
restore permeability.
Excessive foaming (white foam accumulating over the liquid surface) in aeration and/or membrane
tanks could also reduce performance of the STP. Remediation should be taken to eliminate foaming
agent or restore design parameters of the plant.
Permeate bad quality can also indicate default in MBR membrane and operation.
Finally, biological system can also indicate default in operation.
Black color of biomass indicates a lack of aeration,
Increase of bacteria quantity in the reactor indicates a low sludge wasting,
Unpleasant odor can indicate overload of the system, blower failure, etc.
Water quality not achieved: Mixed liquor characteristics are not within proper operating
standards.
Further details are available in the manufacturer' operating manuals in Appendix.

3.13 RECORD KEEPING

Records of the operational, maintenance and sampling procedures will be kept daily in order to assist
in the evaluation of the effectiveness of the STP.
The following will be recorded on a daily basis:
Volume of effluent discharged to the whale tail attenuation pond;
Sewage volume collected;
Details of any maintenance undertaken at site;
Volume of sewage sludge removed from the STP;
Locations and methods of sewage sludge disposal;
Water quality parameter results required to follow the STP performance.
Operation & Maintenance Manual
Sewage Treatment Plant
December 2018
28