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TECHNICAL SOLUTIONS
SPECIAL CASE:
SEPTIC FERMENTATION
Some difficult operating conditions in sewerage networks as well as the
long distance transport of effluent can cause changes to the quality
of these effluents: septicity, production of sulphides, release of H 2
S.
Some accidental circumstances: high effluent temperatures and/or high
sulphate content can produce the same effects and be the source
of serious nuisances:
• production of offensive smells,
• risk of intoxication of operating personnel,
• corrosion of installations,
• malfunctions of wastewater treatment plants.
While it is essential to optimise the design and operation of networks to ensure installation life expectancy
and protect sites, it is also important to choose a pipeline system which does not aggravate these
phenomena. Furthermore, while such situations can be always be anticipated and expected,
it is preferable to choose PAM pipelines with a special “High Security” polyurethane internal lining
(see INTEGRAL ® pH1 range).
The photographs below illustrate the damage,
in particular at water line level.
CHF
Portland B
Portland A
High alumina cement
Sample number 3
shows the good
performance of high
alumina cement.
Saint-Gobain PAM - SEWERAGE - 2012
27