Graf one2clean Manual De Instrucciones página 24

2. Function of the Wastewater Treatment System
2. Function of the Wastewater Treatment System
The one2clean small wastewater treatment system is fully biological and works according to the retention
process with long-term aeration (sequencing batch reactor). The system is essentially made up of an aer-
obic stage. This stage is split into a rest area and an activation area. The chambers are connected to one
another in the bottom section. During this process, therefore, all domestic sewage is immediately exposed
to aerobic wastewater treatment. The entire system is aerated by compressed air being blown in and the
sludge activated as a result of this biologically cleans the wastewater.
The coarse and floating solids contained in the wastewater are initially retained in the rest area by means
of a baffle. The wastewater then passes through an overflow opening in the lower part of the container
from the rest area into the activation area.
As the rest area is also aerated, the solids which remain behind are also degraded aerobically over time.
Wastewater treatment is performed in the one2clean without pre-treatment, so that no anaerobic digestion
processes can occur.
Operation of the treatment system is carried out via a microprocessor control system which controls the
air compressor and air distribution.
The SBR process is a sequence of different steps that occur at set times in a sequence and takes place
at least once a day.
Step 1: Aeration
The wastewater is subjected directly to aerobic treatment for a fixed amount of time. On
the one hand the microorganisms (activated sludge) are supplied with the oxygen nec-
essary for degradation; on the other hand mixing is achieved as a result of pressure
aeration. The air diffuser of the system is supplied with ambient air by a compressor.
The aeration is intermittent, so as to allow targeted wastewater treatment. Thus, differ-
ent environmental conditions can be achieved.
Step 2: Settling
There is no aeration in the second phase. The activated sludge and the remaining set-
tleable solids can now settle by gravity. A clear water zone is created at the top and a
layer of mud forms at the bottom. Any floating sludge which might develop is located
above the clear water zone.
Step 3: Clear Water Removal
The biologically treated wastewater (clear water) is extracted from the SBR stage. This
is done by pumping compressed air according to the mammoth pump principle (air lift
pump). The air lift is designed in such a way that no floating sludge which might develop
is drained on the clear water layer. A minimum water level in the system is maintained
without additional components.
After execution of the third Step, the cleaning process begins again with step 1.
Two cycles are performed per day. The individual adaptation of switching times is possible on the part of
the maintenance company.
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