ES2390037B1 - MUD PROCESSING PLANT AND PROCEDURE FOR PRESSING THE SAME. - Google Patents

Abstract

Sludge processing plant and procedure for its implementation. # The installation of sludge processing and the procedure for its execution and implementation, is that sludge (2) obtained in urban and industrial treatment plants , and after their transport to the corresponding processing plant, they are mixed with wood chips (4), and the mixture introduced in bags (7) that after being closed at both ends and by application of pressurized air with axial compressors (8 ), fermentation takes place inside the bags (7), obtaining a compost of sludge usable as organic fertilizer for agriculture.

Description

MUD PROCESSING PLANT AND PROCEDURE FOR PRESSING THE SAME

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OBJECT OF THE INVENTION

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The present invention relates to a plant for the processing of sludge from urban and industrial treatment plants, whose processing consists basically in the fermentation of a controlled form of the sludge itself, fermenting, drying and maturing them to become a useful and applicable product directly as agricultural fertilizer.

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The object of the invention is to prevent sludge resulting from urban and industrial sewage treatment plants from organic products, having to be discarded and also obtaining an organic fertilizer for agricultural use.

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BACKGROUND OF THE INVENTION

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In accordance with the regulations in our country on the treatment of urban wastewater, it is necessary to have treatment stations in municipalities with 2,000 inhabitants, which has led to the commissioning of a large number of water purification stations residuals, and consequently a very considerable increase in the sludge generated, so that their production in sewage treatment plants is a consequence of the aerobic system of the treatment used.

Well, although these sludges are sometimes sent to landfills or other places, however, we are currently trying, through anaerobic technology, to eliminate and even convert them into fertilizers for agricultural use.

However, the known installations are structurally complex, with a lot of machinery and devices, not very profitable and therefore with low performance.

DESCRIPTION OF THE INVENTION

The plant or installation that is pre-commanded, as well as the procedure for the implementation of the same, has been designed to solve the problem described above, since based on the plant and the procedure in question it is possible to process sludge from urban and industrial treatment plants and convert these sludges into organic fertilizers as a useful product directly applicable in agriculture, as well as in forest farms, parks, gardens, etc.

More specifically, the plant of the invention is based on the arrangement of a series of large plastic bags, in which sludges from the sewage plants mixed with an organic product, preferably small wood chips, are introduced, so that this mixture It is introduced into the large bags by means of a machine called "silage", which at the same time inserts perforated tubes of plastic material between the mixture.

On those bags, once their ends are closed by means of tied,

axial compressors are connected that will introduce pressurized air into the

same, complementing with the placement of thermostats and probes for

Control humidity and temperatures.

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The product or mixture of sludge and chips, ferments

aerobic inside the bags, while drying of the

product, so that once this drying is achieved, said product is

extracted from the bags, which through a loader is passed through a

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sorting screening machine, which will separate the dried sludge in the form of

wood chip compost, which are recycled and reused in

subsequent successive processes.

The installation also includes a floor surface

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weathering, where the resulting compost discussed above is

stack and wait for the final maturation of the same, for later

Marketing as agricultural fertilizer.

The execution procedure of the referred plant is based on the fact that

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sludges from sewage plants are transported by

trucks to the plant itself, where they have also been transported

Organic products corresponding to wood chips.

In a suitable place or ship, both products are mixed and

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subsequently it is introduced in the bags

plastic material, proceeding to the closing of the ends of these and to the

air application, to get an aerobic process and convert said

product in a compost that is taken out of the bags and placed outdoors

for maturation, while the separation of waste is carried out

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   corresponding to unfermented sludge, plastic tubes and

own bags, also proceeding to a process of separation of sludge converted into compost of wood chips, and carrying out the recycling of these on the product obtained as a mixture of wood chips with sludge.

Therefore, the process of the invention is based on an aerobic digestion technology in closed tunnels, which, through forced aeration, allow process control, obtaining in any case a compost that can be of various qualities for use in the unpolluted field, that is, as an agricultural fertilizer, with a series of advantages and benefits that can be summed up in the following:

Environmental: elimination, sm relevant alteration of the ecological balance. Agrarian: application in our soils, highlighting among its qualities a marked improvement in the chemical and biochemical properties of soils, a greater water retention, an economic saving in chemical fertilizers, an improvement in the organoleptic qualities of fruits and flowers, a better resistance to pathogens, a great degree in trace elements, as well as a favor in root growth, creating spaces for air and water, resulting in any case a stabilized organic product or matter, non-toxic, non-harmful or dangerous for the health of people, and in which most of the macronutrients necessary for plant species, (nitrogen, phosphorus and potassium), and the trace elements present in the initial organic matter are found.

DESCRIPTION OF THE DRAWINGS

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To complement the description that will then be made and in order to help a better understanding of the features of the invention, according to a preferred example of practical implementation thereof, a set of drawings is attached as an integral part of said description. where, for illustrative and non-limiting purposes, the following has been represented:

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Figure 1.- Shows the synoptic scheme corresponding to the operation of the plant for the sludge processing object of the invention.

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Figure 2.- Shows a perspective view of the parts that constitute the aerobic fermentation system that participates in the sludge processing plant object of the invention, and that corresponds to the plastic material bags where the sludge mixture is introduced and wood chips, and the air blowers inside those bags.

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Figure 3.- Finally, it shows a diagram corresponding to the operation of sludge processing from urban or industrial treatment plants.

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PREFERRED EMBODIMENT OF THE INVENTION

   As can be seen in the aforementioned figures, and specifically in relation to figures 1 and 2, the plant of the invention comprises a sludge storage vessel (1) from the treatment plants

urban or industrial, and whose sludges (2) are transported from those

sewage treatment plants using trucks (3).

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Likewise, in the plant and outside the sludge ship (2), wood chips (4) are stored, also transported by trucks (3), proceeding by means of a machine (4 ') to the sludge mixture (2) and wood chips (4), obtaining a product or mixture (5) that is transported to the so-called silage, which introduces that mixture (5) in plastic bags (7) that after filling are closed at both ends , subsequently applying to said bags (7) the air produced by axial compressors (8), as shown in Figure 2, air that is pressurized through the corresponding ducts (9).

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In this way, an aerobic fermentation is formed inside the bags (7) of the mixture (5) of sludge (2) and wood chips (4).

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Once the aerobic fermentation and drying of the product has been carried out, it is taken out of the bags (7) so that by means of an appropriate machine or loader (4 ") it is arranged for drying in the open air, being that the product fermented aerobically a compost ( 10) that it matures outdoors, which is left in that part for later commercialization by loading by another machine (4 "') in transport trucks (11), all as shown in Figure 1.

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   Obviously, upon arrival at the plant, the sludge (2) is weighed, analyzed and evaluated for its different characterizations, so that in the warehouse (1) where the sludge is received and deposited (2), it is where the mixture with the wood chips (4) occurs, and although previously it has been said that they were deposited in the plant in an independent place, it will logically be inside the ship (1), where the

mixing by an appropriate machine, with the particularity that such a ship (1) is equipped with Scruber filters, which constantly filter the air neutralizing odors, if any.

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Figure 3 shows the operation or process scheme mentioned above, where the blocks (2 and 4) correspond to the sludge from the treatment plant and the wood chips, mixing of both products according to the block (5), for later in the interior of such bag (7) the fermentation and drying, corresponding to the block (7 '), and later in a later step to carry out the disbursement in the block (7 ") of that figure 3.

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Once the product or compost obtained after fermentation in the block (7 ') has been disbursed, the products from the disbursed (7 ") are separated, which are separated in the block (11) to take them to a manager authorized, and corresponding to the broken tubes (12), broken bags (13) and unusable compost (14).

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Finally, the compost obtained during fermentation is processed to separate sludge from chips according to reference (15), to obtain dry and pure sludge (16) and wood chips (17) that are reused again in the mixing phase (5).

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Claims (3)

1 '.- Sludge processing plant, which being planned to carry The sludge is processed from urban and industrial S treatment plants, to convert them into fertilizers for agriculture. is characterized because it is constituted from a ship (1) in which sludge (2) from the treatment plants and wood chips (4) are mixed, also including large-capacity plastic bags (7) in which the mixture (5) of sludge and wood chips, applying on these bags (7) air The pressure, after the closure of the same, getting an aerobic degeneration of the mixture of sludge and wood, and get a campost that after bag extraction (7) is dried outdoors (10) until final marketing 15 28. Sludge processing plant according to claim 1, characterized in that a series of axial blowers or compressors is included (8) with ducts (9), through which pressurized air is applied inside the bags (7) filled with the mixture (5) formed by the sludge (2) and wood chips (4).   8 ._ Sludge processing plant, according to claims above, characterized in that thermostats and probes are placed on the sludge and wood bags (7) to control the humidity and temperature of the  inside. 3 . _ Procedure for the implementation of a sludge processing plant, characterized in that it consists of: Mix sludge (2) with wood chips (4) and obtain a mixture (5). ES 2 390037 Al Filling large capacity bags (7) with the product of mixture (5). Closed from the ends of said bags (7). 5 Application of pressurized air by axial compressors (8) inside the bags (7). Temperature and humidity control by thermostats and appropriate probes inside the bags (7). Fermentation of the product mixture (5) inside 10 the bags (7) and subsequent drying of said mixture. Extraction of the fermented product and drying of the bags (7) and place it outdoors as compost (10) of sludge for its maturation and subsequent commercialization of it. 15 58 ._ Procedure for the implementation of a sludge processing plant, according to claims 4 and 5, characterized in that after the maturation of compost (10) after fermentation and drying, separation (15) of pure mud and wood chips is carried out, the latter being sent for reuse to the sludge mixing phase (2) and wood chips 20 wood (4).