Efficient cleaning process:
In the process tank, bioprocesses; aeration of organic
material, nitrification, denitrification takes place one
after the other. In addition to bioprocesses, a chemical
process works simultaneously .
Bioprocess:
All wastewater from the property is led to a treatment
plant. The first tank space is the pre-treatment space
for wastewater. The treatment plant monitors incoming
wastewater volumes and automatically adjusts the
treatment plant's functions when the load changes.
When enough water has accumulated in the pre-
treatment tank, aeration of the organic material in the
wastewater and nitrogen nitrification (fine bubble
aeration) begin. During aeration, an air pump is used to
pump air through pipelines to a fine bubble spreader.
During aeration, the active sludge in the process tank is
mixed with the pretreated wastewater, whereby the
bioprocess begins, whereby the microbial growth in the
active sludge uses organic material as food. At the
same time, nitrification takes place, whereby the
nitrogen changes state. The air that is pumped out into
the water leaves the treatment plant through drainage
ventilation on the roof of a residential building.
Chemprocess:
While aeration is in progress, RAKE iron chemical is
metered into the treatment plant to separate
phosphorus. At the end of the aeration, a clarification
period begins, during which the activated sludge and
phosphorus (reacted with the iron chemical) precipitate
to the bottom of the process tank.
Clarification:
At the end of the process, the water treated with
BioKem processes is clarified. At the same time, the last
of the bioprocesses takes place, denitrification.
Pumping of purified water:
At the end of the clarification period, the clarified water,
ie purified water, is pumped out of the treatment plant
using a P2 pump. The clarifier is pumped through the
pipes, whereby a part of the purified water is
automatically separated in a monitoring vessel with a
tap placed in the pipes. It is easy to determine the
efficiency of the treatment plant operation from the
monitoring test.
Automatic functions in case of downtime:
The treatment plant is equipped with automatic
functions to maintain biological readiness during times
without incoming wastewater (downtime). The
treatment plant automatically supplies air and
wastewater to the process tank when the downtime
continues. Thanks to the automatic functions the
downtime can be about 3 months without special
measures.
Purified water is led to nature:
Purified water can be led directly to an open ditch or
absorbed / filtered by simple post-filtration in the
terrain. The degree of purification is sufficient even for
sensitive areas (beaches and groundwater areas)
Further treatment, ie the so-called third stage (eg
particularly sensitive beach areas, groundwater areas)
can also be connected to the treatment plant, which
ensures even higher treatment and hygiene of the
outgoing water with UV light.
Sludge treatment:
The sludge to be removed from the treatment plant is
odorless and stabilized in the bioprocesses. It is
generated in small amounts, 0.3 to 0.1% of the amount
of purified wastewater (1-3 l / m3).
The sludge treatment equipment is connected to the
treatment plant to remove excess sludge from the
process tank.
The sludge is removed to a separate sludge tank, from
where it is emptied by a tanker for municipal treatment.
The tank size is dimensioned for emptying intervals
once a year.
The sludge can also be taken to a composter connected
to the treatment plant, in which case no emptying of
the tanker is required.
RAITA BioKem utilizes
natural biochemical
cleaning
Asennus- ja käyttöohjeet biomoduulit
CE
EN 12566-3
RAITA BIOKEM processes: