27
VII. Chemical Cleaning
The chemical cleaning should be carried out to remove foulants accumulated in
the membrane pores or sticking to the membrane surface.
Carry out the chemical cleaning before the trans-
membrane pressure rises up to 200 kPa (29.0
PSI), or the module filtration performance could be
reduced significantly.
Follow the instruction described in this manual
when you carry out the chemical cleaning. If you
use the unacceptable chemicals or perform the
cleaning altered from the recommended
procedure, the membrane could be seriously
damaged.
Pay full attention when handling chemicals and be
sure to wear the safety gear such as glasses and
gloves. The chemicals used for the chemical
cleaning are harmful to people. If chemicals
directly contact your skin, your eyes or other body
parts, take the appropriate treatment as stated in
its SDS.
Do not mix sodium hypochlorite with acid. Such
mixture generates toxic chlorine gas.
Stop operations when any instrumental anomalies
occur or any sign of anomalies are observed.
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