B. USER GUIDE 3. RECOMMENDATIONS FOR OPERATION AND MAINTENANCE
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Installation and User guide – ECOROCK - Systems – 26-05-2016
3.1 PRIMARY TANK AND EFFLUENT FILTER
For a non-BIOROCK Primary Tank please refer to the maintenance schedule from the manufacturer of
the Primary Tank that you have purchased. However, should you be unable to get information,
BIOROCK can provide a maintenance planning schedule giving you an overview of the maintenance
procedures.
Please check how often you need to empty your Primary Tank in line with local regulations.
Please check if the Primary Tank has the required efficiency that is required by BIOROCK. See
page 9, Chapter 2.1.
MAINTENANCE GUIDE FOR THE PRIMARY TANK (PT) AND THE EFFLUENT FILTER (EF)
Sampling of the pre-treated waste water coming from the Primary Tank
Take your first sample 6 months after commissioning, then once a year, or at the same time
as the Primary Tank is emptied
Check (visually) the pre-treated wastewater quality
Take a sample (with rubber or latex domestic use gloves) of the purified sewage water in a clean glass.
The color of the water should range from light brown to yellow, from turbid to very turbid, but very
little deposit should show at the bottom of the sample after it has rested for twenty minutes
The purified water may have a slight (septic) odor
If the water looks different or you find increased deposits in the pre-treated waste water,
this may be caused by:
Water flowing too fast through the PT, too short retention time (hydraulic overload). Check that no
rainwater run-off system passes through the installation.
The volume of the Primary Tank is too small to accommodate normal usage
Incorrect disposal of harmful, toxic, anti-bacterial or non-biodegradable products into the
installation
You may need to call a certified septic tank cleaning company to empty the PT and to clean it
(skimming off the fats and floating matter — the surface layer). Never completely empty the PT;
always leave a layer of sludge at the bottom to ensure that it continues to function correctly after it
has been emptied
In all of these cases, you should consult the documents and user manuals provided by the tank
manufacturer
If you notice any foul odors, these may be caused by:
The ventilation system is not working properly
The ventilation system is not airtight at the T-piece of the water inlet in the PT
The internal waste water system in the house is not vented properly with a soil vent pipe
The inspection seals or the seals on the Primary Tank are not air- or watertight
Insufficient airflow through the ventilation system; ventilation pipes too small - diameter
>100 mm, a badly positioned wind driven ventilator, etc.
A block in the airflow in the tank itself, because the surface layer has become too thick
(for example fats & floating matter) or a baffle wall that is too high.
In all of these cases, you should consult the documents and user manuals provided by the
manufacturer.
