ES2408114B1 - PROCEDURE AND SYSTEM FOR THE TREATMENT, STABILIZATION AND VALUATION OF ORGANIC WASTE OR SUB-PRODUCTS - Google Patents

Abstract

Procedure for the treatment, stabilization and recovery of organic waste or by-products comprising the stages of feeding, drying, pasteurization and obtaining the final product characterized in that the feeding stage comprises crushing and a decrease in the moisture of the organic waste or by-products, the drying stage comprises a superficial dehydration of the particles of organic waste or by-products, the adhesiveness thereof being limited, the third stage comprises a pasteurization of said organic waste or by-products and an adjustment of the humidity thereof and the fourth stage It comprises obtaining a chemically and microbiologically stabilized organic fraction, with a moisture content of less than 10%, which is ground, refined, screened and / or densified, for conservation or later use.

Description

PROCEDURE AND SYSTEM FOR THE TREATMENT, THIS BILIZATION AND VALUATION OF ORGANIC WASTE OR SUB-PRODUCTS

5

The object of the present invention is a process for the treatment of organic waste or by-products. for obtaining a stabilized organic fraction (FOE). The technology of stabilized organic fraction or FOE. which implements the present invention, is within the sector of recycling techniques or recovery of organic matter, both for combustion, and for recycling in other processes or applications.

1 0

STATE OF THE PREVIOUS TECHNIQUE

1 5 2 O

The treatment of organic waste is an area of technology in increasing use for the last 30 years with different systems and procedures for this. Given the mcdio-environmental problems that these products generate due to a defective treatment, a by-product or waste evaluation protocol is established: (a) idemify the raw material, evaluating its aptitude for scr incorporated into the industrial process; (b) characterize the product, determining how the conditions of the process are influenced. (e) stipulate the technology of the process engineering, determining the conditions of the most suitable work from the economic and technical point of view; ( d) to study alternatives of process conditions that improve their economic and technical profitability; and Ce) evaluate auxiliary systems for reliable decryption and control of maturity and control balances, possibilities of energy recovery, study of the alternatives DColrol systems and process automation.

25 30

An important factor in tcncr cn cucnta cn the prcscmc invcnción cs the concept of water activity (a ",) which indicates the fraction of the total moisture content of a product that is free, and consequently, available for growth of micn> organism and so that different chemical properties that affect its stability can be carried out Ticne valorcs quc oscillate cm Oy 1, as much as the value is, the better that organic matra will be conserved. It is also related to the texture of food. Food with an a.,., elcvada has a more juicy, ticma and chewable texture. This parameter also affects other properties such as grouping and agglutination of powdered and granulated products .

35

The a.,., Is a critical factor that determines the shelf life of the products. It sets the limit for the development of many micr () () organisms, while other parameters such as temperature, pH or common sugar, gcncralmcmc influence the speed of

increase.

5

The lowest <lw for the growth of most bacteria that deteriorate food spoilage is around 0.90. The aw for the growth of fungi and yeasts is close to 0.61. The growth of fungi micoroxigénkos occurs with values of a,., Close to 0.78.

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The technical problem that the prcscmc invention intends to solve is the derivation of the need for a procedure for the treatment of organic waste by means of a system "quick on the order of minutes. High performance and high productivity, economical, controllable, programmable and automated, which can be developed in a minimum space and in a trmamic plant with the possibility of being transpOItablc.The objective is that the whole product, cs dccir, also the waste, such as the by-products that can be used in the treatment plant one day, scan treated and issued that same day.Avoid its degradation, that is, its rot.There is patent ES2 I47964, which describes a procedure for the treatment of urban wet waste, especially derived from food comprising the phases dc: so mctcr a continuous source of wet waste, previously crushed and free of metallic parts, with a turbulent layer in order to heat up or up to a temperature of pasteurization / cterilization, it takes a necessary time for complete cooking, to provide a continuous, pasty and moist ingredient of cooked and sanitized residues, and followed by said ingredient with a view to drying, so that the product has a moisture degree not exceeding 15% by weight.

25

Said patcme dcscribe difcremes rcalizacioncs of the invcnción, depending on the initial matter empicada. Among the applications of the obtained product sc is that of animal feed, or fertilizer for agriculture, and to which the granules obtained can be fulfilled even if an imposing amount of time has passed since their treatment.

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EXPLANATION OF THE INVENTION

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The procedure and system object of the prescmc invcnción, possessed substantial differences in front of the state of the art, since it allows to treat organic waste by means of a faster system (measurable in a few minutes), with a high performance and greater productivity, Being an economic process, fully programmable, controllable and automatable, occupying very little space, managing to treat all the waste that enters the treatment plant in one day, leaving no waste or by-products without dealing with

damages and inconvenience that this generates.

5

Further. The procedure of the invention is characterized in that it uses (Otally organic waste and by-products. Achieving a practically zero environmental impact. together with a great energy efficiency, caused the minimization of the use of space in the landfill, and therefore, achieving an optimal balance economic.

10

In an aspcclO scheme of the invention, the process for the processing, stabilization and recovery of organic waste is based on a mechanical and thermal drying and pasteurization process, by means of which it is transformed, in a few minutes. the residue or byproduct. in a dry material, chemical and microbiological stable mcntc, of volume and weight up to 10 times less than the original and which is suitable for subsequent use as fuel, organic fertilizer or feed for livestock and various feed.

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An important aspect with respect to other systems and processes known in the state of the art is that the invention totally avoids the presence of an unwanted pasty phase, since the invention implements an initial thermal process or drying stage, with a surface dehydration of the particles that limit its adhesiveness, preventing the formation of a mass agglomerate that would slow down the process, by decreasing the surface exposed to gases and increasing energy consumption to move it.

25

The method of the invention, which implements a technology for obtaining an innovative stabilized organic fraction in the sector, encompasses the treatment of the organic fraction of solid waste, where if the waste to be treated is not 100% organic, as is the In the case of ordinary domestic collection, it is necessary to apply previously a conventional inorganic selective separation system.

3 or 3 5

The first stage that is executed in the process of the invention is the feeding of the device itself, with the particularity that if the organic matter has not had a previous aeration process, which reduces its humidity, the residues must enter the system to through the presses and crushers in order to reduce the size and humidity of its particles, to homogenize the material. Such particles are reduced to about 25 mm in maximum size, although they could simply be chopped up, but the energy consumption would be greater, and there would be less homogeneity. Additionally, it is necessary to ensure in previous stages, if necessary, that said particles enter the system with a moisture content of less than 50% by weight.

Subsequently, a second stage of thermal drying is executed, at the exit of the crusher

(and / or the cxtlUsora). The temperature reached by the gases in this clap is cncucmra cmrc the

2500 and 3W e, with a significant surface dehydration of these elapa

waste particles or by-product in heat exchange treatment, between these and the

5

heating fluid, also starting pasteurized.

Next, pasteurization or third stage of the procedure is maintained. which is

develops at a gas temperature of 900 cmc and 1500 e, so that

guarantee the optimal conditions for the pasteurization of the product and the adjustment of its

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humidity.

In the second and third lower clap it would be possible to take advantage of the ealephaelOr fluid as

Cogeneration gases, thermal fluid boilers and / or heat generator powered by

the same fuel product obtained in said phase.

fifteen

Finally, in the cumia stage or final stage. an organic fraction is obtained

stabilized which, depending on its origin, is refined with a ballistic band and / or table

densimetric where the heaviest small fraction is removed (vitreous matter, ceramic or

others that could not separate wet) and then with a sieve or air cooler

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forced, where the material is cooled and separated into three fractions: one of smaller size, which

it comes out as a finished product, and depending on its destination, it will densify; the larger one than

leaves the device for recycling or for fuel of the device itself, and the size

intermediate, which is recirculated to, after passing through the mill, return again to the beginning of the

process.

25

The first, second and third stages are developed in a pasteurized / dried equipment

continuous rotary thermal, which is specifically designed to maintain balance

energy during the treatment process of waste or by-products. At

scope of the present invention said equipment will be called a rotating tromel.

3 0

In another aspect of the invention the product obtained, or stabilized organic fraction (FúE),

It is stable chemical and microbiological, without the presence of pathogenic microorganisms

(due to pasteurization), of smell and colol "pleasant, with a maximum humidity of 12% in

weight, where in a preferred embodiment of the invention it is about 10% by weight.

35

Said stabilized organic fraction can be pelleted, through a process that leaves the

product with a humidity of less than 10% by weight. This degree of humidity guarantees its

storage in optimal conditions for long periods of time, which can be

over 1 year, not altering its properties or its storage or in your USD. The fine product obtained has a potential year of exploitation in various fields, such as energy, agriculture and livestock, between or trO $.

5 10

For the purposes of the prcscmc invention, cIHicndc is provided by (double-pass romcl, the tromc1 formed by two concentric cylinders. These are three for the {triple-pass romcl. in one direction by the innermost cylinder, changing to the opposite direction of the circulation when passing the consecutive outer cylinder. Additionally, in the present invention it will be understood by "double section trommel, to the (rotary cylinder or cylinder having two H'ansversales sections of different diameter, in different sections of its linear structure

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Throughout the description and the claims the word "comprises" and its variants are not intended to exclude other technical characteristics, additives, components or steps. For those skilled in the art, other objects, advantages and features of the invention will be apparent from the description and partly from the practice of the invention. The following examples and drawings are provided by way of illustration, and are not intended to be limiting of the present invention. In addition, the present invention covers all possible combinations of particular and preferred embodiments indicated herein.

BRIEF DESCRIPTION OF THE DRAWINGS

25

A series of drawings that help to better understand the invention and that expressly relate to an embodiment of said invention that is presumed as a non-limiting example thereof is described very briefly below.

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FlG l. It shows a view of the rotary trommel that implements the drying and pasteurization stages within the system object of the present invention, it is a "one-step" and double section "tromel", with two differentiated diameters.

3 5

FIG 2. It shows a view of the double-pass and double-section rotary trommel, used in an embodiment of the invention.

DETAILED EXHIBITION OF REALIZATION MODES

As indicated above, the present invention is based on a method

for the treatment, stabilization and recovery of organic waste or by-products that

5

It includes the stages of alirncmation, drying, pasteurization and obtaining the final product

characterized in that:

a) the first feeding stage comprises crushing and a decrease in the

moisture from organic waste or by-products,

b) the second drying stage comprises a superficial dehydration of the particles

10

of waste or organic by-products. the adhesiveness of the

same.

e) the third stage comprises a pasteurization of said waste or by-products

organic and a moisture adjustment thereof, and

d) the fourth stage comprises obtaining a stabilized organic fraction, which

fifteen

It is ground, refined, screened and / or densified, for conservation or later use.

Concretamefl (and the procedure consists in a reduction of the size of the organic waste

by crushing, and subsequent thermal drying and pasteUlization, to stabilize / inertize the

product, and can then grind and densify the product compacted, briquetted or

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pe \ etized.

In this procedure, the residue or by-product to be treated must have a component

organic, if not, it is necessary to previously apply a selection and separation stage

of inorganic materials.

25

Next, as the first stage of the procedure it is necessary to ensure that the waste

enter the system with a controlled degree of humidity, less than 50% by weight and with a

average particle size less than 25 mm.

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The material enters a continuous rotary thermal drying and pasteurization equipment (trome \

rotary) of specific design, which will be described later. During the drying stages

and pasteurized, the gases are between 90 ° and 300 ° C, for an average period

between 15 and 30 min The output temperature of the pnxlucto is

between 75 and 85 ° C.

35

At the exit of the installation it is possible to obtain three product fractions of different

sizes, with a maximum moisture content of 12% by weight, preferably less than 10

% in weigh. 10 which guarantees its storage for long periods of time and the

possibility of being destined for many uses, such as agriculture, livestock,

power generation, ctc.

5

As indicated by amcriormcntc, for the realization of the dcsclito process a design has been designed

specific equipment. consisting of a "tromel" or double and double step rotary cylinder

section, or single step and double section.

Fig. 1 shows a rotating barrel (1). which differs from those commonly known,

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in which the diameter of its section has been modified in a certain section of the cylinder, to

allow to work at two speeds of air flow.

In Fig. 1 it can be seen that the tromc? (1) has an input hopper (7) of waste or

by-products to be treated, which immediately go to a first section (5) where

fifteen

it carries out with great imcnsity the transfer of heat between the heating fluid and the waste or

by-products The high effectiveness of this second stage is given by the combination

Optimum parameters: air flow rate, which can range between 2 and 4 mis, the

high temperature at which the stage elapses, being of the order of 25Cf '-30Cf' C and the

high product density, being initially between 30 and 50% by weight of moisture.

twenty

The previous conditions of drying cause that the residues or subp. "Oductos undergo a

intense dehydration of the surface of the particles, limiting the adhesiveness of the

themselves and avoiding the formation of an unwanted pasty phase, which would slow down the process and

It would increase energy consumption.

25

As a third stage, superficially dry waste or by-products pass to a second

section (4) of greater diameter than the first section (5), the ratio being between

dimensions of it, about 1: 2. In said second section (4) OCUlTe a

decrease in gas velocity, thus preventing the product from leaving the trommel

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by pneumatic transpoltc, despite having decreased its density in the previous stage. The

gas velocity at this stage can be between 0.5 and 1.5 mIs and the temperature of

these gases will be between 90 and 150 OC, thus guaranteeing the optimum conditions for

product pasteurization and adjustment in its humidity.

35

As the fourth stage of the procedure is obtaining the organic fraction

stabilized, consisting of a chemically and microbiologically stable product, which is refined

with a ballistic band and / or densimetric table where the small fraction is eliminated more

heavy (vitreous, ceramic or other matter that could not be separated wet) and then with

a sieve-cooler with forced air, where the material is cooled and separated into three fractions:

a smaller one, which comes out as a finished final product or stabilized organic fraction

and depending on your destination, it will densify, another fraction of intermediate size io is recirculated to

5

return to the beginning of the process and the fraction of major (size leaves the device for recycling or

for use as own fuel. After this stage, the final finished product or

stabilized organic fraction has a humidity of less than 10% by weight.

Additionally, as an important element of the invention, the distribution of

10

the different sections, with different diameter, of the tromati rotati vo (1), which ensure a

high effectiveness of the process through a compact equipment configuration, which occupies

Little surface and that can be easily maneuverable.

In the present invention, as depicted in Fig. 1, a rotating trommeter is described

fifteen

(1) single step and double section (5, 4), which is constructed and calculated in a way that, the

product to be treated initially passes through a first section (5) of a certain diameter,

where there is a high speed and temperature of the heating fluid; next the product

in treatment it passes to a second section (4), whose diameter is about twice that of the

first section (5), so that the gas velocity is reduced and adapted to the

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decrease in product density, trust to avoid pneumatic transport of the

product without the proper pasteurization of the same.

The design described above is applicable to both the single-step trommel, and those of

double and triple step.

25

In said tromel (1), the treated organic waste or by-products, converted into product

final, they leave at the other end of the equipment and through evacuation chamber (8), decanted

by its lower hopper. Through the top of that chamber and through the cyclone separator of

dust (2) the gases leave, which before being evacuated into the atmosphere, are passed through a dry reactor and

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A filter to ensure your tOlal safety. The reactor neutralizes possible acidic samples (chlorine

and / or sulfur) that can destroy the organic matter from solid waste

urban (RSU) and the filter prevents possible leaks of impalpable dust.

In an embodiment of the invention. according to Fig. 2, a double rotating rotating barrel (1) is shown

3 5

step and double section, where in concentric cylinders the product circulates in one direction

in the intelllo cylinder (3), to return in the opposite direction for the space between

said inner cylinder (3) and the outer cylinder (6). In this case, the difference with others

existing equipment, is that the gas passage section, will be growing at each step,

maintaining values in the different air flow velocity and temperature parameters,

similar to those described for the tfome! one step and double section; of similar form, in the

trome \ rotary (1) shown in Fig. 2. the product enters the equipment through a hopper

5

aspirated cmrada (7). These double pass and double section equipment are more compact in

its dimensions, which is its main advantage.

The advancement of the product in a cyclical rotary tromc1 is localized, according to the aalUal

state of the art in two different ways:

10

a) Due to the inclination of inner vanes or a helicoid that forces the advance

mechanically, while, indefeetib \ cmeme, the con · ieme intellla del

air, also accelerates that advance, first in the product "waterfalls"

that occur in all known models.

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b) A slight inclination of the trommel (0.5 to 3), with palastros parallel to the axis of the

thromel, which can be simple radial blades pclimetrales that vohean the

product or forming cells, which subdivide the material, increasing supelf icie

of contact with the product and improving the yield.

twenty

The speed of circulation or linear advance of the product, as we see, is produced in the

option (a) for the combined effect of mechanical thrust, dominate me and additional tire.

However, in option (b) the advance is entrusted mostly to the push

pneumatic, or drag effect that produces the air / gas flow in its contact with the

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product, both superficially in the batteries that rotate in the cells or on the blades,

like the one that occurs when the product cascades into that flow.

In both cases, it is a priority when designing the tromel, to avoid speeding in the

gases that would produce the effect of pneumatic transport, with which the residence time

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necessary for the processes, it would disappear. This priority / need determines the design of the

tromel, colliding with the principle that governs to achieve maximum heat transfer

and / or moisture evacuation, which is proportional to the difference in the fluid flow rate

heater and / or dryer and the pmduct to be treated.

3 5

Thus, when the product does not have large variations of apparent density during the

process (as is the case with mineral products, sands, etc.) the optimum speed of

gases, may be close to the pneumatic transpol1e of the dry product, being close to the

Ideal drying speed throughout the process.

In products where the apparent density at the entrance of the process, with (Ode its humidity, may be more than double that of the product in the middle of it, the gas velocity is limited

5 to avoid the effect of pneumatic transport when the density drops. On the other hand, when the product is starting its treatment, it is very far from the optimal transfer / drying rate. with which the performance of the set is seriously limited.

The solution provided by the double or triple section system along the (romel, both in

10 (rome! Of a step as of multiple steps. Is that it allows to start the process with the maximum gas velocity and maximum heat transfer (maximum yield) for a product that can have WlU bulk density of about 0.8 Tm / m3; to reduce that speed when the product, by losing water, has reduced its density at 0.5 Tm / m3, before the effect of pneumatic transport occurs, which would eject the product without finishing its

15 pasteurized / dried, so that the useful section of the trommel is increased, thereby reducing the speed of the gases proportionally, which allows to keep the product to be treated, the time needed to pastelllize and that the humidity of the panicles emerges , by capillarity, achieving the expected final moisture content, and the product remains with an apparent density that is usually around 0.3 Tm / m3 or less.

20 The scope of this technology is very wide: it is advisable in any product that substantially decreases its density to dehydratarsc. All kinds of products of vegetable origin, both fruits and vegetables, and wood (can go from apparent density of 0.8 to <0.3 Tm / m3), organic waste in general; bread to make breadcrumbs, where you pass from

25 40% HzO to 8% by weight, reducing its density from 0.6 to 0.25 Tm / m3, so it is necessary to adjust the gas velocity to avoid entering pneumatic transpOlte that would end the process improperly. .

The process entails a significant reduction in the weight and volume of waste: 30

ENTRY

SA LI DA -frac. Organic, Urban Solid Waste (MSW). OUT Fresh vegetables

100 Kg. Waste

70 Kg. Dry Product (FOE) 10 Kg. Dry product (FOE)

10 Kg. InCites

2.1 Kg. Inert

18.2 1. Hidden water

20 Kg. ~ Oevaporada

70.6 kg evaporated H20

Continuous production allows great versatility in terms of the daily work rate. the possibility of absorption of waste treatment tips, the lipo of waste to be treated in the same plant and the modification and / or subset of the subsystems.

5

It is a quick process, which is implemented in a period of time between 20 and 30 minutes cmrc and that requires a minimum space. of the order of 20 m2rrm / day for the treatment and 40 m2rrmldía for the reception and storage.

1 0

For example. a population type of 50,000 inhabitants, with an approximate production of 22,000 tons / year of urban solid waste. With an average of 11,000 tonnes / year of organic waste, it requires 2,900 m2 of partially covered area.

fifteen

The process has a great performance since the profitable unit plates range from 1000 Kg / h to 40,000 KgIh. With larger productions, it is advisable to install a combination of parallel line combinations.

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On the other hand, the process thus deserito eumple eon all environmental regulations, since it also allows the control of odors to an acceptable level within the treatment, not being in any way unpleasant, as those normally generated in other processes.

25

The product obtained is a stabilized organic fraction (FOE) that is a dry material, with a humidity of less than 10% by weight, biologically stable, hygienic, with a pleasant odor, and highly recoverable in various applications depending on the origin and traceability of waste:

3 0

As solid fuel in different finishes / compacted. As an organic amendment in annual crops. Component of organ-milleral fertilizers. As ingredients for feed manufacturing.

Energy properties as fuel come from domestic MSW.

PCS (Higher calorific value)

35 PCI (Lower calorific value) Ashes 9.92% by weight. Humidity 10.5% by weight.

15,246 U / Kg. (3,648 kcal / kg.) 13,646 U / Kg. (3,275 kcal / kg.)

Conversion rate: 80% by weight For the comra.-io, for paper and cmton, as an example we have to:

PCI (paper)

4,300 kcal / kg.

PCI (cardboard)

7,970 kcal / kg.

Ashes (paper)

10.2% by weight

Ashes (coal)

10.3% by weight

The generated product does not produce emissions of nitrogen oxides or sulfur dioxide. Fine particles in suspension are easily trapped in bag filters. He eat gone from ashes is scnsiblcmcmc less than other solid waste used as fuel (beet 21% by weight, mTOZ husk 17% by weight).

Agricultural properties and use of the product obtained as an abollo. Only when the residue comes from controlled food by-product - Factory, Market central, ctc.

Organic matter 88.39% by weight Humidity 8.99% by weight Nitrogen 2.41% by weight Phosphorus 0.11% cn weight Potassium 1.38% by weight Calcium 0.83% by weight Magnesium 0.15% by weight C / N ratio 18 Recommended field of application: annual agricultural crops Dosage: 75 Tm / Ha Recommendations: Use the ground product. Stabilization times: 14 days in seed applications.

Properties as a livestock product (feed) Only when the residue comes from controlled food by-product - Factory, Market central, ctc.

BtlJta fiber 11.54% by weight Ethereal Extract 5.9 1% by weight

Fatty acidity 134 mg. KOH / 1OOg. Dry sample. Nitrogen 2, 11% by weight Crude protein 13.21% by weight Total sugars 7.76% by weight

5 Sugars rcduclOrcs 7.5% by weight Starch 6.78% by weight Calcium 8325 rnglkg. Magnesium 1315 rnglkg. Sodium 1083 mg / kg.

10 Ashes 12.82% by weight

Material usable as ingrcdicmc in the manufacture of feed given its good level of fiber, protein and sugars, which is only usable in the case of coming from selected waste from the market or from the canning industry.

The product obtained or stabilized organic fraction, can be perfectly stored at room temperature with moisture contents of the product of 9.5-10% by weight corresponding to water activities aw below 0.4 implying a good stability of the Production lasted more than 1 year.

20 To optimize space and facilitate product transfer it is advisable to densify the product by compressing it by pcletizing or briquetting.

Claims (1)

one-

Procedure for the treatment, stabilization and recovery of waste or

Organic by-products comprising the stages of feeding, drying. pasteurized and

5

obtaining the final product characterized by:

a) the first stage of feeding comprises a tri tudo and a decrease in the

moisture from organic waste or by-products,

b) the second drying clamp compressed a superficial dehydration of the particles

of waste or organic by-products. the adhesiveness of the

10

same.

e) the tc. "wax stage comprises a pasteurization of said waste or by-products

organic and an adjustment of their humility, and

d) the fourth stage comprises obtaining a stabilized organic fraction, which

It is ground, refined, screened and / or densified, for conservation or later use.

fifteen

2

Procedure according to claim I characterized in that the stage of

Feeding of organic waste or by-products may require as a previous step the

removal of inorganic materials.

2 o

3 Method according to claim I, because in the

food waste or organic by-products, these are crushed to a size of

25 mm particle with a humidity of up to 50% by weight.

4

Procedure according to claim 1 characterized in that the drying stage

25

It comprises a heating air flow rate of between 2 and 4 m at a temperature

between 2500 and 3 (Xf C.

5

The method according to claim 4 is characterized in that at the stage of

dried organic waste or by-products initially possess a moisture content of

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between 25 -50% by weight.

6

Method according to claim 1 characterized in that the step of

Pasteurized comprises a heating air flow rate between 0.5 and 1.5 ms at

a temperature between 900 and 150 "C.

35

7

Method according to claim 6 characterized in that in the elapa of

Pasteurized organic waste or by-products have a degree of humidity of up to

12% by weight.

8

Method according to claim 1, characterized in that the drying and pasteurization steps are carried out in a period of time between 15-30 min.

5

9 Method according to claim 1 characterized in that in the stage curnia a stabilized organic fraction is obtained which is a stable chemical and microbiological product and has a moisture content of less than 10% by weight, with a pleasant smell and color.

1 0

10Product consisting of a stabilized organic fraction obtained according to the procedure of claim 1 c3r. characterized by being chemically and microbiologically stable in periods longer than 1 year and having a moisture degree of less than 10% by weight.

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11 System for the treatment, stabilization and recovery of organic waste or by-products comprising means of pressing and crushing the initial product, means of thermal drying and pasteurization of the type of continuous continuous cylinder that maintains the energy balance of the process and means for separating fractions of the product that is characterized .... said drying and pasteurizing means comprise a tromme! Rotary (1) with double section in certain sections of the cylinder, so that a first section (3, 5) has a smaller diameter than a second section (4,6).

12 · System according to claim 11 characterized in that between the first section (3, 5) and the second section (4, 6) is 1: 2.

the existing relationship