BIOLAN GREYWATER FILTER LIGHT, User Manual

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1. Planning and installation
The operation of the Biolan Greywater Filter Light is based on the
mechanical and biological filtration of wastewater. The dirt in the
wastewater sticks to the organic filter material in the filter. The
micro-organisms living on the surface of the material use the im-
purities in the water as their nutrition.
The module contains five filter boxes placed one on top of the
other. The wastewater is conducted into the uppermost filter
box. Inside the filter, the wastewater flows nearly horizontally by
gravitation from one filter layer to the other through the open-
ings in the end of the box.
Wastewater from a WC or dry toilet in the property must be con-
ducted into a closed tank or treated otherwise in a due manner.
Rain- or stormwater or drainage water from foundations must not
be fed into the filter. The cleaning capacity of the filter material in
the module is good for about 100 days, after which it should be
replaced in accordance with the maintenance instructions.
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.
1.1 Technical specifications
• dimensions of the module: (width x height x depth)
560 x 580 x 960 mm
• two modules installed in parallel: width about 1,300 mm
• two modules installed in series: min depth about 2,030 mm
• pipe connectors for Ø 75 mm sewer pipes
• height difference of inlet and outlet connectors is 450 mm
(height of fall)
• capacity of the module: about 300 litres per day
• maximum flow per hour: 50 l/h
• the distance, travelled by water in the filter material:
about 325 cm
• weight without the filter material: 24 kg
• change of filter material: about every 100 days of operation
• Cleaning performance: Complies with tighter requirements
for grey water in Finland.
1.2 Location out of doors
The Biolan Greywater Filter Light shall be installed above ground
or buried partly in the soil. If the unit is buried in the ground, a
ground support shall be built around it to take the pressure of the
surrounding soil. Place the filter in a location where water will not
gather, even when there is flooding. The filter can be installed out
of doors without a cover. The unit has no thermal insulation. If the
unit is used also in winter, it must be located in a space where the
temperature stays above zero at all times.
1.3 Location inside a residential building
If you are planning to install the filter indoors or in close prox-
imity to a residential building (for example, under the terrace),
then some maintenance space with its own entrance should be
provided.
This space must also be provided with a floor well or an earthen
floor for possible malfunctions.
1.4 Air circulation
The operation of the filter is based on activity of the microorgan-
isms. These micro-organisms need oxygen to survive, and there-
fore, it is vital to provide the filter with sufficient air exchange.
To ensure this, the module delivery includes two T-brances with
which the air exchange system can be realised. A prerequisite for
efficient natural ventilation is a height difference between the air
inlet and outlet (from bottom to top), and possibly also a tem-
perature difference (from colder to warmer).
The replacement air for the filter is routed from the end of the
discharge pipe or via the air pipe that rises from the discharge
pipe to above the ground surface. The outlet air from the filter
located out of doors shall be routed as sewer ventilation to the
roof or via an air pipe in the incoming sewer to the yard area. The
outlet air from a filter located indoors or in immediate proximity
to a residential building shall be routed as sewer ventilation to
the roof of the building.
In Finland, building a wastewater system or changing
it in locations with pressurised water always requires
a building or action permission from the municipal
building authority or a submission of notification of
action. The building permission is applied by submit-
ting a relevant plan.
A properly dimensioned, installed and operated Bio-
lan Greywater Filter Light wastewater system meets
the requirements of decree (157/2017) of the State
Council of Finland on the treatment of domestic
wastewater outside the sewer systems of the water
authority.
Whenever the Greywater Filter is located in a warm
space in a residential building, or in close proximity
to a residential building, the correct installation must
always be verified with the expert in charge of plan-
ning the HVAC system for the building as well as to
ensure the municipality requirements for renewal of
the wastewater system.