B. USER GUIDE > 3. OPERATING AND MAINTENANCE RECOMMANDATIONS
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Installation and User guide – MONOBLOCK Systems – 06-12-2016
Effluent Filter cleaning and replacement
The BIOROCK effluent filter should be checked annually and cleaned (rinsed) or replaced when
required.
Open the cover at the PVC pipe that provides
access to the Effluent Filter
Take the rod holding the Effluent Filter and lift it
carefully to remove
Beware of flying particles
The Effluent Filter should be replaced when
necessary, when its condition is not fit for efficient
filtering of suspended solids anymore.
Checking/Emptying of the Primary Compartment
The first emptying of the Primary Compartment takes place when the sludge level reaches 50% of the
Primary Compartment volume, unless superseded by local regulations.
Always ask a certified septic tank emptier / licensed contractor
Check sludge level in the Primary Compartment and the Effluent Filter annually.
The emptying frequency may be adapted according to the nature of operation and depending on
how many people are using the system. The Primary Compartment must be emptied when the
sludge level reaches 50% of the volume (height of 660 mm from the bottom of the tank)
The cleaning certificate issued by the licensed contractor must be kept by the owner in the
maintenance guide.
The licensed contractor should pressure wash the sides of the tank and the Effluent Filter to
remove the accumulated fats and other matter.
The Primary Compartment is immediately re-filled with clear water after emptying before
resuming normal operation.
The tanker, while emptying the Primary Compartment, must not be parked any nearer than
4 meters (14’) from the installation to ensure and maintain stability.
Further information:
The quantity of sludge produced is influenced by how the unit is used (size, frequent overloads, type
of waste water, routine maintenance). Each installation is different.
We estimate that an installation of 5 PE will produce a maximum of +/- 900 liters of sludge in the first
year. The quantity of sludge produced will reduce over the first few years: normally after the fourth
or fifth year, the residual quantities will have decreased by 40%.
When emptying, the cleaner must leave a few centimeters of sludge at the bottom of the tank; the
bacteria that break down the sludge are specific and take a long time to develop.
