EN-4
EN
2.4 Conducting wastewater to the
filter
The wastewater is conducted directly to the filter alternatively by
gravity, by flow drainage or by a pump well. To ensure an even
distribution, the inlet pipe should be provided with a straight
80cm-long part before the branch sleeve (part 7), that reduces
turbulence of the incoming water flow.
If you intend to utilise existing septic tanks during pumping,
these should be in good condition and hermetically sealed. The
operation of the pump must be sequenced using a timer so that
during one sequence the pump will feed at maximum 20 litres
of wastewater to the filter. The interval between the sequences
must be at least 10 minutes. The Biolan Timer, the Submersible
Pump and the Pump Well are available as an option.
2.5 Discharge point for the
wastewater
Conduct the treated wastewater to a suitable discharge point,
for example a stone pocket or an open ditch. When planning,
bear in mind that the discharge of wastewater should be unob-
structed even when the level of the surface water or groundwa-
ter is high. If you route the water to an open ditch, provide the
end of the pipe with a flap or a net to prevent rodents or other
small animals from gaining access.
Toxic
Hazardous to
the environ-
ment
Corrosive
Inflammable
Oxidizing
3. Installation
Place the filter on a firm and even surface that is not susceptible
to frost, such as, for example, a bed of gravel or crushed stone
or a cast concrete slab. The filter must be in a horizontal posi
-
tion both lengthwise and laterally to allow the wastewater to flow
smoothly over the entire cleaning area of the filter material.
3.1 Connecting the inlet and outlet
sewer pipes
While installing gravity flow sewers, a sufficient gradient (of at
least 1-1,5 %) needs to be provided to allow the wastewater to
flow without obstruction from the sewer outlet of the house all
the way to the discharge point.
There are inlet and outlet connectors for 75 mm sewer pipes on
both sides of the filter. Depending on the requirements of the
location, the pipes can be installed on either side. Connect the
sewer pipe coming from the building to the inlet connector at
upper edge of the filter. Connect the discharge sewer pipe to the
outlet connector at its lower edge. Close the unused openings
using plugs (product number 571513).
If the filter will be used in winter, the inlet sewer must be insu
-
lated. Whether also the outlet sewer needs to be insulated, shall
be considered case by case.
3.2 Putting the filter material in place
The filter material is packed in plastic bags for transportation.
Remove the plastic bags. Rip the filter material loose and spread
it evenly across the boxes by tapping it gently. Resulting from
the packaging method, the bags may contain excessive amount
of filter material. The filling grade of the box is suitable when the
surface of the filter material lies about 2 cm lower than the brim
of the box. Finally, draw the filter material about 5 cm to the rear
from the V-openings in the discharge end of the box.
The filter material boxes are identical, but their direction should
be observed – in the uppermost box water flows towards the
rear wall, in the next box it flows towards the service door etc. In
the lowermost box water flows towards the rear wall, from where
it falls along the shaped bottom into the discharge sewer.
4. Use and maintenance
The unit must be used and maintained in accordance with the in-
structions, and its operation must be monitored regularly. Main-
tenance of the wastewater system also involves maintenance of
the pump well and the septic tanks, if provided.
Into the filter can be conducted washing waters and waters from
sauna as well as dishwashing and laundry waters. The filter tol
-
erates a small amount of anti-bacterial or chlorine-based agents
that are commonly used for cleaning. Follow the dosing instruc-
tions issued by the manufacturer of the detergent.
Wastewater from a WC or a dry toilet, rain water or stormwater,
or drain water from foundations must not be conducted into the
filter. Toxic chemicals or substances that contain such chemi
-
cals, which can kill the micro-organisms that clean the waste-
water, such as drain openers, paints, oils or solvents, must not
be conducted into the filter. Harmful chemicals can be identified
from the markings on their packaging:
3.3 Opening the air valves
The operation of the filter is based on activity of the micro-or
-
ganisms. These micro-organisms need oxygen to survive, and
therefore, it is vital to provide the filter with sufficient air ex
-
change. There are two adjustable disk valves for air exchange in
the rear wall of the modules. Set both disk valves of the module
about 10–20 mm ajar for the summer. In winter keep the valves
only slightly ajar (about 5–10 mm). If you have realised the air
exchange by means of sewer ventilation, keep the air valves
completely closed to avoid odour problems (see point 2.3).
Summary of Contents for GREYWATER FILTER 125
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