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AMBIOCELL® AMBIENTALIA®,
AEROBIC COMPOSTING BIOCELLS.
AmBiocell® Ambientalia®, the power of
an innovative idea.
AmBiocell is a technology devised, developed and patented by
Ambientalia for the aerobic bioxidation of organic material
and for accelerated maturation of compost.
The organic part of the solid urban waste (previously
selected) is suitably mixed with structuring material
(woodchip) if the material to be stabilised consists of damp
waste from differentiated collection or sludge, or similarly
if it is riddled from mechanical separation of the organic
fraction with a particle size less than 50 mm.
Organic fraction of S.U.W.
prior to
chopping and riddling |
Waste chopped and riddled to
50 mm |
The mixing phase is fundamental inasmuch as the mixture must
correspond to precise values with regard to the following
parameters: humidity, apparent density and C:N ratio.
Otherwise the evolution of the bioxidation phase will be
problematical.
The product thus prepared is introduced, with a rubberised
shovel, into the AmBiocell. Before filling the biocell the
false ceiling is fully raised so that the mechanical shovel
can operate in complete safety.
Thanks to the pneumatic closure roof, perfectly airtight, the
revolutionary system of partial air recirculation, both
incoming and outgoing, with regard to the biomass, avoids the
leakage of odorigenous particles, of gases and vapours, which
are automatically recovered and introduced into the mass under
stabilisation without creating environmental problems. A
supplementary fan aspires excess air and delivers it to the
bio-filter for purification.
The air treatment fan sucks in all vapours and foul-smelling
fumes and the aspired air is conveyed to the bio-filter for
purification.
On completion of filling, the false ceiling is lowered and the
temperature and oxygen probes are inserted. The front hatch is
closed and the controlled aerobic bioxidation process is
initiated by the management software.
Detail of AmBiocell plant with roof
raised and roof closed
Aeration of the biomass
The material under processing in the bio-cells requires air in
order to supply oxygen to the aerobe micro-organisms
responsible for bio-oxidative reactions.
The amount of oxygen needed changes with time: more at the
beginning, when the fresh mix is rich in putrescible organic
substances, and less at the end when the reactions have
consumed much of it. This is why the fan has variable delivery
governed by the inverter; on the basis of the progress of the
process, evaluated by measuring the temperature of the
material, the quantity of air to convey to the mass can be
increased or decreased.
The process air may, depending on functional use, be
distinguished as:
-
“stoichiometric” air: this indicates the quantity of
air strictly necessary for the carrying out of bio
chemical reactions in the material, in such a way
that the bioxidation reactions may take place
correctly throughout the mass of material; it is a
minimum quota of the total delivery.
-
temperature control air: the excess air with
regard to the stoichiometric quota which must be
given to the material to control the development
of heat and the rising of the temperature.
The ventilation plant is sized on the basis of the maximum
delivery of thermometric control air.
Sectioned detail of AmBiocell with
details of air blowing and recovery.
Insufflation system with aerated flooring
The aerated flooring is created with insufflation pipes laid
comb-fashion and fed by a partial recirculation fan and a
demister on the air return, sized on the basis of the maximum
quantity of material deposited on the flooring. The fan
delivers air to a concrete conduit where the tubes are
situated.
The abovementioned aerated flooring offers the following
advantages:
-
Better air distribution.
-
Low losses of capacity.
-
The tubing is anti-blocking inasmuch as
the perforations are flared and protected by a groove in
the concrete which prevents compacting of materials in the
hole.
-
In the case of blocking the tubing can
be cleaned. In the section below the part to be
insufflated, each tube is equipped with anti-blocking
truncated-cone nozzles which blow air.
The nozzles are protected by a gutter set in the surface of
the flooring. By way of the manifold collector the tubes flow
into a trap for percolates which is equipped with an outer
seal to prevent the leaking of air. The process takes place
directly within the biocells without any environmental impact,
without dispersion of waste caused by the wind and without
uncontrolled leakage of percolate or foul smells.
Detail of underfloor aeration
pipes with
spickets before laying reinforced concrete.. |
Underfloor aeration pipes
with spickets
before laying reinforced concrete. |
The biocells are of variable size in function of the quantity
of waste to be treated.
The width may vary from 3 to 7 metres with a maximum length of
50 metres. Maximum height of the heap within the AmBiocell is
3 metres, the advised height being 2.5 metres.
Even for a small sized biostabilisation plant the minimum
quantity of biocells is 4 modules.
On completion of delivery of the biomass to the AmBiocell, the
computer is fed with various technical data: Type of process
(organic solid urban waste, solid organic fraction, vegetation
& sludge, material from anaerobic digestion etc., weight of
material introduced into the bio-cell).
AmbiControl, the management and control software, processes
the input data and begins the process.
The start of the aerobic process gives rise to a controlled
rise of temperature within the AmBiocell.
Controls
The entire process is controlled by our exclusive AmbiControl
software.
Temperature
The temperature is taken continuously by three PT100 probes
inside every bio-tunnel. It is transmitted to the management
and control system which can thus modulate, by means of an
inverter, the air delivered by the fan, this with view to
maintaining the best operational conditions for the
biostabilisation process.
Oxygen
Control is carried out by a digital probe inside the
fermenting biomass. The air analysed by this exclusive system
allows modulation of fan delivery to maintain the right
quantity of oxygen into the AmBiocell, controlled by the
software, and also reduces electricity consumption to a
minimum during the process.
The application of the AmBiocell is suitable for both
composting plant with FOS and for biological stabilisation of
S.U.W. is dumps or with sludge, vegetation etc.
Consumption
Electricity consumption is on average one tenth (1/10) in
comparison with an equally powerful plant of the traditional
type.
AmBiocell section with view
of frontal hatch. |
AmBiocell section with view of
insufflation
and air recovery technological plant. |
> Use of AmBiocell in a
composting plant
> Advantages of AmBiocell
> AmBiocell
electrical and mechanical apparatus
>
Presentation and data sheet (PDF)
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