KR20170050743A - System for manufacturing soil reform materials using food waste - Google Patents

Abstract

The present invention is to provide a system for manufacturing a food waste soil conditioner capable of efficiently manufacturing and supplying a high quality soil conditioner using food waste. The system comprises: (a) separating a leachate while discharging food waste after bringing in the food waste, sending the leachate to a leachate storage tank, and transferring the food waste to a drum screen; (b) separating impurities contained in the food waste and transferring the to an impurity storage box, and transferring the selected food waste to a food waste sorting storage hopper; (c) transporting the crushed food waste to a crushed food waste storage hopper; (d) dehydrating the food waste, sending an effluent to an effluent storage tank, and transferring the food waste to a first mixer; (e) mixing a moisture control material with the food waste, and transferring the mixture to a mixture storage hopper; (f) discharging a lime reactant from a lime reactor and transferring the lime reactant to a lime reactant storage hopper; (f) preparing a soil conditioner, transferring and storing the soil conditioner to a soil conditioner storage hopper, and discharging the gas discharged from the hopper to the atmosphere; and (h) discharging and packaging the soil conditioner. The present invention provides a system for manufacturing a food waste soil modifying material capable of efficiently manufacturing and supplying a high quality soil modifying material using food waste.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a soil-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soil remediation material manufacturing system using food waste.

In Korea, more and more food waste is generated due to the improvement of living standards. However, the method of treating food waste is very limited, and a satisfactory treatment method has not yet been developed. For example, there has been proposed a method of recycling as feed or compost, but it is not economically feasible because salinity must be removed. In addition, although a method of using biogas as a raw material has been proposed, there is a problem in that the cost is not high due to a large cost of equipment. Therefore, some food waste was dumped with industrial wastes, but recently marine dumping was prohibited by law. Therefore, food waste is buried in ground or treated by incineration. However, since this also causes environmental pollution problems such as ground water pollution, soil pollution and air pollution, development of a proper treatment method of food waste is urgently required.

In order to produce and recycle food waste as livestock feed or agricultural compost, it is necessary to select and remove various foreign substances and metals, such as plastic bottles, which are mixed with food waste, and then grind food waste to an appropriate size, After the dehydration of water is removed to some extent, the dehydrated food waste is sterilized and fermented and dried to produce livestock feed or agricultural compost.

Conventional methods in which food waste is biochemically treated as a soil improvement agent for agricultural use include sawdust, bark, chaff, livestock by-products and the like as an excipient and moisture regulator in the treatment of food waste. However, the food waste has high moisture, salt, strong perishability, acidity, and often lacks inorganic nutrients. As described above, only by-products of sawdust, bark, chaff, It is difficult to sufficiently provide the growth conditions of In addition, when the microorganisms are not sufficiently grown, the fermentation process of the food waste is not sufficiently performed, and there is a problem that environmental harmful substances such as odor are generated during the fermentation process.

Korean Patent Publication No. 10-2011-0077253

The present invention has been made to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a system for manufacturing a food waste soil modifying material capable of efficiently manufacturing and supplying a high quality soil modifying material using food wastes do.

The present invention also provides a soil improvement method for improving the adaptability of a microorganism and minimizing occurrence of odor and fermentation odor by using a microorganism carrier which maintains vigorous activity of the microorganism for a long period of time, It is another object of the present invention to provide a soil remediation material manufacturing system capable of producing ash.

The present invention

(a) Bringing food waste into the food hopper and storing hopper, separating the food waste by discharging the food waste by the discharge screw conveyor installed in the lower part of the hopper, and sending the separated food waste to the leachate storage tank, ;

(b) separating the impurities contained in the food waste through the drum screen and transferring the contaminated food waste to the contamination storage box, and transferring the selected food waste to the food waste sorting storage hopper;

(c) discharging the food waste using a discharge screw conveyor and a piston pump under the food waste sorting storage hopper, transporting the food waste to a crushing separator, separating the impurities while separating the food from the crushing separator, Transporting the shredded food waste to the crushed food waste storage hopper by the transfer conveyor;

(d) The food waste is discharged from the crushed food waste storage hopper, and is transferred to the screw dehydrator using the conveying conveyor and the piston pump. The food waste is dewatered by the screw dehydrator to send the desorbing liquid to the desorbing liquid storage tank, To a first mixer;

(e) discharging the moisture control material from the moisture regeneration reservoir and transferring the moisture control material to the first mixer by the conveying conveyor to mix the moisture control material with the food waste, and transferring the mixture to the mixture storage hopper by the conveying conveyor;

 (f) discharging the mixture from the mixture storage hopper, introducing the mixture into a lime reactor with a conveying conveyor, discharging the quicklime from the lime storage tank, introducing the lime into the lime reactor with a conveying conveyor to react, discharging the lime reaction product from the lime reactor, Conveying to a lime reactant storage hopper with a conveyor;

(g) discharging the humus soil, the microbial carrier, and the lime reactant from the humus soil storage tank, the microorganism carrier supply apparatus, and the lime reactant storage hopper, respectively, and transferring and mixing them to the second mixer to produce the soil improvement material, Transporting the soil to the soil improvement reservoir by a transporting conveyor and storing it, discharging the discharged gas through the condenser and the dust collector to the atmosphere; And

(h) discharging the soil modifying material produced from the soil modifying material storage hopper, transporting the soil modifying material to the packing machine by the transporting conveyor, and packaging the food modifying material.

The food waste soil remediation material manufacturing system of the present invention makes it possible to efficiently manufacture and supply a high quality soil remediation material using food waste, thus contributing greatly to prevention of environmental pollution and resource recycling.

The present invention also provides a soil improvement method for improving the adaptability of a microorganism and minimizing occurrence of odor and fermentation odor by using a microorganism carrier which maintains vigorous activity of the microorganism for a long period of time, Provide ashes.

1 to 4 schematically show a system for manufacturing a food waste soil remediation material according to the present invention in accordance with the flow of a land remediation material manufacturing process.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings exemplified by the embodiments of the present invention. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

As illustrated in Figures 1 to 4,

(a) Food waste is carried into the food waste loading and storage hopper (M-01), and the food waste is discharged by the discharge screw conveyor (SC-01) installed in the lower part of the hopper, -01), and the food waste is transferred to the drum screen (M-04) by the conveying conveyors (M-02 to 03);

(b) The impurities contained in the food waste are separated and transported to the obstacle storage box BOX-01 through the drum screen (M-04), and the selected food waste is conveyed by the conveying conveyors (M-05 to 06) To a waste sorting storage hopper (M-07);

(c) The food waste is discharged by a discharge screw conveyor (SC-04) under the food waste sorting storage hopper (M-07), and the food waste is discharged using a crushing separator (M-09 And the shredded food waste is sent to the piston pump (M-12 A, B). The shredded food waste is sent to the impregnated storage box (BOX-02) To the crushed food garbage storage hopper (M-13);

(d) The food waste is discharged from the crushed food waste storage hopper (M-13) and transferred to the screw dehydrator (M-15) by the conveying conveyor (M-14). The food debris (M-18) by a conveying conveyor (M-17) to the desalination liquid storage tank (PIT-02);

(e) The moisture control material is discharged from the moisture control reservoir M-20 and transferred to the first mixer M-18 by the conveying conveyor M-19 to mix the moisture control material with the food waste, Conveying the mixture to a mixture storage hopper (M-23) with conveying conveyors (M-21 to 22);

 (f) The mixture is discharged from the mixture storage hopper (M-23), charged into the lime reactors (M-31A or M-31B) by the conveying conveyors (M-24 to 26) (M-31A or M-31B) to the lime reactors (M-31A or M-31B) by feeding conveying belts (M-28A to B and M-29) Discharging the reactants and transferring them to the lime reactant storage hopper (M-34) with the conveying conveyors (M-32 and M-33);

(g) discharging the cored soil, the microbial carrier, and the lime reactant from the mortar reservoir M-38, the microorganism feeder M-37, and the lime reactant storage hopper M- 36, and the soil modifying material is transferred to the soil modifying material storage hopper (M-50) by the conveying conveyors (M-40, 41, 42, 44, 46, 49) And discharging the gas to the atmosphere through a dust collector and a condenser (M-30);

(h) discharging the soil modifying material produced from the soil modifying material storage hopper (M-50) and transferring the soil modifying material to the packing machine (M-52) by a conveying conveyor (M-51) To an improved remanufacturing system.

2, the desalination liquid collected in the desorbing liquid storage tank PIT-02 is separated into oil, sludge, and separated water by an oil water separator M-16, To the first mixer of the step (e), and mixing the moisture control material and the food waste together.

Specifically, the desorption liquid stored in the desorbing liquid storage tank PIT-02 is transferred and stored by the transfer pump P-02 A / B to the desorbing liquid storage tank T-01, / B to the oil water separator M-16 to separate the oil, the separated water, and the sludge into a sludge feed pump P-07 A / B to be mixed with the first mixer M-18. The oil is stored in an oil storage tank (T-02) and discharged, and the separated water is stored in a separated water storage tank (PIT-03) and used or discharged.

In the soil modifying material manufacturing system of the present invention, the leachate stored in the leachate storage tank PIT-01 in the step (a) is transferred to the leachate transfer pump (p-01A / B) And can be treated together with the desorption liquid.

As shown in FIG. 4, in the soil modifying material manufacturing system of the present invention, in the step of transferring the soil modifying material to the soil modifying material storage hopper (M-50) by the conveying conveyors in the step (g) And a micro-crushing process may be further performed.

Specifically, the necessary processes can be performed by variously arranging the magnetic separator (M-43, M-48) and the micro-crusher (M-45) vibration discriminator (M-47).

In the lime reactor (M-31A or B) of the step (f), hot exhaust gas is generated, and the hot exhaust gas is transferred to the second mixer (M-36) of the step (g) Microbial carriers, and lime reactants. When the high-temperature exhaust gas is used as described above, the mixing of the soil, the microbial support, and the lime reactant is much better, so that a high-quality soil modifying material can be produced.

In the soil modifying material manufacturing system of the present invention, the moisture controlling material in the step (e) is not particularly limited, but typically a by-product of palm may be used. The palm by-product refers to palm fibrous waste, which is obtained by extracting the palm sands necessary for making palm oil from the harvested palm fruit (fruit), extracting the remaining lumps and palm oil, Palm trees, and palm trees that have been cut down. These palm byproducts not only serve to reduce the moisture content of food wastes containing a large amount of water, but also improve the calorific value of the fuel containing the wastes.

Palm is a Palmae plant, with about 1,000 known species, most of which grow in tropical or subtropical regions. Palm is very useful wood, leaves, sap and fruit. In addition, there are various kinds of palm fruits called cocoa palm, pan palm, wax palm, palmyra, cabbage palm and palmetto, and in particular, oil palm, date palm and coconut palm are found in East Asia, It is well known as a commodity harvested in many parts of the African continent. The harvesting of all these farms generates significant amounts of biomass and waste, which occur in many forms, many of which are not being handled in a satisfactory manner. Therefore, it can be imported and used at a low price.

As the moisture control material, sawdust or rice hull, corn stand, etc. may be used.

In the soil remediation material manufacturing system of the present invention, the microorganism carrier supplied from the microorganism feeder (M-37) contains 10 to 20 wt% of potassium hydroxide, 10 to 20 wt% of sugar, and 60 to 80 wt% of ethanol , The rice straw which had been cut into a size of 1 mm to 50 mm was immersed for 0.1 to 3 hours, and then the rice straw was taken out and dried. Then, the rice straw was treated with the bacteriostatic, pseudomonas, selenomonas and streptomonas microorganisms Is inoculated and proliferated, is preferably used.

Rice straw is widely used as a compost, and in itself provides excellent effects for inoculation and propagation of microorganisms.

The rice straw carrier is a microorganism habitat. It prevents the fermentation of acetic acid by the action of impregnated potassium hydroxide. It enables the microorganisms to be easily supplied with nutrients by the impregnated sugar, and to proliferate well. By the alcohol impregnation, .

The mixing of the rice straw support and the microorganism may be performed at a ratio of 1 to 20 parts by weight of the microorganism to 100 parts by weight of the rice straw. The mixing ratio of the microorganisms may vary depending on the time of propagation of the mixture of the rice straw and the microorganism.

The rice straw and the microorganism are cultivated at 30 to 35 ° C for 5 to 25 days while continuously stirring the rice straw carrier and microorganisms in a microorganism storage tank of a microorganism feeder (M-37) at a stirring speed of 100 to 150 rpm. Then, it is dried at 20 to 25 ° C for 1 to 10 days to inoculate, multiply and sporulate microorganisms in the rice straw.

The microorganism carrier may be supplied to the second mixer M-36 by a microorganism injection pump while being stored in a microorganism carrier storage tank (not shown).

The microbial carrier prepared as described above improves the adaptability of the microorganism when put into the food waste and maintains the vigorous activity of the microorganism for a long period of time. Also, the occurrence of odor and fermentation odor is minimized, and a land reformer finally produced by incorporating a large amount of microorganisms has an excellent fertilizer function.

Among the microorganisms, the microorganisms such as Bacillus, Pseudomonas, Selenomonas and Streptomonas actively active at 30-40 ° C and 60-70% or higher in humidity and have the characteristic of surviving in the hibernating state at room temperature.

Most of the microorganisms can be collected and cultured in soil, sewage, food waste, compost, etc., and commercially available ones can be purchased and used.

In the above, the rice straw may be appropriately mixed with rice bran, silk, loess, zeolite and the like.

In the soil remediation material manufacturing system of the present invention, parts other than those described above and those shown in the following drawings can be applied as is known in the art.

Hereinafter, the present invention will be described in more detail by way of examples. However, the following examples are intended to further illustrate the present invention, and the scope of the present invention is not limited by the following examples. The following examples can be appropriately modified and changed by those skilled in the art within the scope of the present invention.

Example 1: Preparation of rice straw carrier

10 kg of potassium hydroxide and 10 kg of sugar were dissolved in 50 liters of ethanol and 100 kg of rice straw cut into a size of 5 mm was immersed in the solution for 1 hour and then separated and dried to prepare a straw straw carrier.

Example 2: Production of rice straw (microorganism carrier) inoculated and grown with Bacillus

100 kg of the straw straw carrier prepared in Example 1 was infused with 10 kg of Bacillus, a microorganism having a water content of 70 to 80% and a volatile solids (VS) and a total solids (TS) ratio of 1: 1 to 0.45, The microbial carrier storage tank of the apparatus was incubated at 30 to 35 DEG C for 25 days with stirring at a stirring speed of 120 rpm and then the incubator was cooled to 20 to 25 DEG C for 8 days to obtain rice straw ).

Example 3: Production of soil modifying material

The food waste was treated by the following method according to the system for manufacturing a food waste soil modifying material of the present invention.

The food waste having a water content of 85% was brought into the food waste loading and storage hopper, and the food waste was discharged by the discharge screw conveyor installed at the lower part of the hopper, and the leachate was separated and sent to the leachate storage tank. The food waste separated from the leachate was transferred to a drum screen by a conveying conveyor.

Through a single drum screen with a throughput of 27.4 m ² / hr, the impurities contained in the food waste were separated and transported to the contamination storage box, and the selected food waste was transferred to the food waste sorting hopper. The water content of the food waste conveyed to the selective storage hopper was reduced to 84%.

The food waste is discharged by the discharge screw conveyor under the food waste sorting storage hopper, and the food waste is transported to ^two pieces of the crushing separator having the throughput of 10 m ² / hr. The crushing separator separates the food while the food is crushed, And the shredded food waste was transferred to the crushed food waste storage hopper by the conveying conveyor.

Food waste is discharged from the crushed food garbage storage hopper and is conveyed to two screw dehydrators having a throughput of 9 m ² / hr by a conveying conveyor. The food waste is dehydrated by the screw dehydrator to send the desorbing liquid to the desorbing liquid storage tank, (Dehydrated cake) was conveyed to the first mixer by a conveying conveyor. The water content of the dehydrated cake was reduced to 75%.

(Moisture content: 15%), which is a moisture control material, was discharged from the water regulating reservoir at a rate of 38.28 m ² / hr and transferred to the first mixer by a conveying conveyor to mix the moisture control material with the food waste (dehydrated cake) The mixture was transferred to a mixture storage hopper via a transfer conveyor. At this time, the water content of the mixture was reduced to 60%.

The mixture was discharged from the mixture storage hopper and charged into a lime reactor with a conveying conveyor. The lime (moisture content: 5%) was discharged from the quicklime storage tank at a rate of 38.28 m ² / hr, The reactants were discharged from the lime reactor and transferred to a lime reactant storage hopper using a transfer conveyor. The water content of the lime reactant stored in the lime reactant storage hopper was reduced to 50.59%.

(Water content 30%) at a rate of 38.28 m ² / hr and a microorganism carrier 22.57 kg (weight ratio) at a rate of 38.28 m ² / hr, respectively, from the cornstarch storage tank, the microorganism carrier supply apparatus and the reagent storage hopper, / hr and lime reactant at a rate of 45.412 m ² / hr, and transferred to a second mixer by a conveying conveyor and mixed to prepare a soil modifying material having a moisture content of 45%. The soil modifying material was conveyed to a soil modifying material Transferred to a storage hopper and stored.

The soil modifying material produced from the soil modifying material storage hopper was discharged and transferred to a packing machine by a conveying conveyor.

Comparative Example 1: Production of Soil Modifying Material

In the same manner as in Example 3, except that the same amount of Bacillus microorganism as that used in Example 2 was added to the soil modifying material of Example 3, instead of the microorganism carrier prepared in Example 2, Soil modifiers were prepared.

Test Example 1: Evaluation of quality of soil modifying material

The soil modifying agent prepared in Example 3 and Comparative Example 1 was left for 5 days, and then the smell was evaluated using a smell. The results are shown in Table 1 below.

The soil conditioner of Example 3 The soil conditioner of Comparative Example 1 smell Almost no food waste smell Strong odor of food waste

Test Example 2: Measurement of the number of microorganisms contained in the soil modifying material

After the soil remediation material prepared in Example 3 and Comparative Example 1 was left for 7 days, the number of microbial cells was measured by a dry film medium (using 3M ^TM Petrifilm), and the results are shown in Table 2 below.

The soil conditioner of Example 3 The soil conditioner of Comparative Example 1 smell Number of microbial cells 170 ~ 1,550 Microbial cell number 50 to 150

Claims (7)

(a) Bringing food waste into the food hopper and storing hopper, separating the food waste by discharging the food waste by the discharge screw conveyor installed in the lower part of the hopper, and sending the separated food waste to the leachate storage tank, ;
(b) separating the impurities contained in the food waste through the drum screen and transferring the contaminated food waste to the contamination storage box, and transferring the selected food waste to the food waste sorting storage hopper;
(c) discharging the food waste using a discharge screw conveyor and a piston pump under the food waste sorting storage hopper, transporting the food waste to a crushing separator, separating the impurities while separating food from the crushing separator, Transporting the shredded food waste to the crushed food waste storage hopper by the transfer conveyor;
(d) The food waste is discharged from the crushed food waste storage hopper, and is transferred to the screw dehydrator using the conveying conveyor and the piston pump. The food waste is dewatered by the screw dehydrator to send the desorbing liquid to the desorbing liquid storage tank, To a first mixer;
(e) discharging the moisture control material from the moisture regeneration reservoir and transferring the moisture control material to the first mixer by the conveying conveyor to mix the moisture control material with the food waste, and transferring the mixture to the mixture storage hopper by the conveying conveyor;
(f) discharging the mixture from the mixture storage hopper, introducing the mixture into a lime reactor with a conveying conveyor, discharging the quicklime from the lime storage tank, introducing the lime into the lime reactor with a conveying conveyor to react, discharging the lime reaction product from the lime reactor, Conveying to a lime reactant storage hopper with a conveyor;
(g) discharging the humus soil, the microbial carrier, and the lime reactant from the humus soil storage tank, the microorganism carrier supply apparatus, and the lime reactant storage hopper, respectively, and transferring and mixing them to the second mixer to produce the soil improvement material, Transporting the soil to the soil improvement reservoir by a transporting conveyor and storing it, discharging the discharged gas through the condenser and the dust collector to the atmosphere; And
(h) discharging the soil modifying material produced from the soil modifying material storage hopper and transferring the soil modifying material to a packing machine by a conveying conveyor and packaging the food modifying material.
The method according to claim 1,
Separating the desorbed liquid collected in the desalination liquid storage tank into oil, sludge, and segregated water by an oil separator, and transferring the sludge to the first mixer in the step (e), and mixing the water with the moisture control material and the food waste Wherein the soil is in the form of a soil.
The method of claim 2,
wherein the leachate stored in the leachate storage tank is transferred to the desalination reservoir and treated together with the desalination liquid in the step (a).
Claim 1
Wherein the high temperature exhaust gas generated in the lime reactors in step (f) is transferred to the second mixer in step (g), and mixed with the corroded soil, the microbial carrier, and the lime reactant to treat the food garbage soil Modified remanufacturing system.
The method according to claim 1,
Wherein the soil remediation material is further subjected to a sorting process and a micro-crushing process in the step of transferring the soil remediation material to the soil remediation material storage hopper by the conveying conveyor in the step (g).
The method according to any one of claims 1 to 5,
The microorganism carrier supplied from the microorganism carrier supply device is prepared by adding rice straw cut to a size of 1 mm to 50 mm to a solution containing 10 to 20% by weight of potassium hydroxide, 10 to 20% by weight of sugar and 60 to 80% A carrier obtained by inoculating and growing at least one microorganism selected from the group consisting of bacillus, pseudomonas, selenomonas, and streptomonas microorganisms on a straw straw carrier prepared by immersing in water for a predetermined period of time, Wherein the soil is in the form of a soil.
The method of claim 6,
The microorganism carrier is placed in a microorganism storage tank of a microorganism feeder in a ratio of 1 to 20 parts by weight of microorganism to 100 parts by weight of a straw straw carrier and incubated at 30 to 35 ° C for 5 to 20 days with continuous stirring at a stirring speed of 100 to 150 rpm, Wherein the microorganisms are inoculated, multiplied, and sporesized in the rice straw by drying the microorganisms at 1 to 25 占 폚 for 1 to 10 days.

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