KR100895607B1 - Waste water treatment apparatus of resource process from food waste water - Google Patents

Abstract

The present invention relates to a wastewater treatment apparatus of a food wastewater recycling process, and more particularly, to ferment the wastewater generated in the process of recycling the food waste into a liquid or compost and to recycle the process water or to discharge the purified water into the process water or discharged to the outside. The present invention relates to a wastewater treatment apparatus of a wastewater recycling process.

Wastewater treatment apparatus of the food wastewater recycling process according to the present invention, by heating and stirring the wastewater generated in the food waste recycling process and rotating the heated wastewater at high speed to separate into oil, wastewater, sludge and high-speed separation of the separated wastewater by microorganisms In the process of the liquid fertilizer manufacturing unit for precipitating and separating the microorganism and the treated water produced by the fermentation, the fermentation compost manufacturing unit for mixing fermentation by supplying some of the liquid ratio of the liquid fertilizer production unit and supplying air and stirring and fermentation; It is characterized in that it comprises a purifying unit for receiving the separated supernatant is precipitated by using iron salt, sodium hydroxide, flocculant in order to flocculate the suspended matter and then supply air to remove the suspended matter floated on the water surface.

Food wastewater, recycling, liquid manure, compost, purification

Description

Waste water treatment apparatus of resource process from food waste water}

The present invention relates to a wastewater treatment apparatus of a food wastewater recycling process, and more particularly, to ferment the wastewater generated in the process of recycling the food waste into a liquid or compost and to recycle the process water or to discharge the purified water into the process water or discharged to the outside. The present invention relates to a wastewater treatment apparatus of a wastewater recycling process.

In general, food waste occupies one-third of household waste and is organic, but contains a large amount of water, so it is not easy to incinerate and contains a lot of salt, which makes it difficult to recycle. In addition, food waste has been pointed out as the main cause of odor and leachate, and the movement of refuse from landfill is taking place.

In recent years, the necessity of food waste recycling has emerged in response to the surge in international feed and fertilizer prices. In farms that have neglected their use, interest in food waste resources is increasing.

In order to recycle food waste, food is sterilized by heating, dried and crushed, and then manufactured. The food and compost were prepared through a process such as a crusher, a dehydrator, a vacuum cooker, a dryer, a grinder, and the like.

However, in the related art, sludge and various foreign substances contained in the food waste waste water are discharged as it is while collecting and discharging the waste water generated in the process of recycling the food waste into the ocean, thereby causing environmental pollution.

In other words, the amount of food waste recycling facilities has increased significantly, but the facilities that treat wastewater generated during the recycling process fall short of the facility standards, and the quality of products is deteriorated due to the lack of willingness to invest in facilities.

The present invention has been made to solve the above problems, by fermenting the waste water generated in the process of recycling the food waste to the liquor or compost and purifying the supernatant generated during the liquid fertilizer manufacturing process through a separate purification facility It is an object of the present invention to provide a wastewater treatment apparatus of a food wastewater recycling process that can prevent secondary environmental pollution as well as recycling of food waste wastewater by recycling or discharging it into process water.

The present invention, by heating and stirring the waste water generated during the food waste recycling process, and rotating the heated waste water at high speed to separate into oil, waste water, sludge and precipitates the microorganism and the treated water generated by high-speed fermentation of the separated waste water by microorganisms The liquid fertilizer manufacturing unit to separate, the fermentation compost manufacturing unit for mixing the liquid fertilizer with a portion of the liquid fertilizer manufacturing unit and feed the air and stirred by fermentation, and the supernatant water precipitated and separated in the process of the liquid fertilizer manufacturing unit, iron salt, hydroxide It is characterized in that it comprises a purification unit for removing the floating matter floated on the water surface by supplying air after agglomeration of the suspended matter using sodium, flocculant in turn.

Wastewater treatment apparatus of the food wastewater recycling process according to the present invention, by fermenting the wastewater generated in the process of recycling the food waste resources to the liquor or compost and purifying the supernatant generated during the liquid fertilizer manufacturing process through a separate purification facility By recycling or discharging into water, it has the effect of preventing the secondary environmental pollution as well as the recycling of food waste wastewater.

In addition, by re-supplying the sludge generated in the process of purifying the supernatant generated during the liquid fertilizer manufacturing process to the compost manufacturing unit has the effect of increasing the amount of compost produced during the recycling process.

Wastewater treatment apparatus of the food wastewater recycling process according to the present invention, by heating and stirring the wastewater generated in the food waste recycling process and rotating the heated wastewater at high speed to separate into oil, wastewater, sludge and high-speed separation of the separated wastewater by microorganisms In the process of the liquid fertilizer manufacturing unit for precipitating and separating the microorganism and the treated water produced by the fermentation, the fermentation compost manufacturing unit for mixing fermentation by supplying some of the liquid ratio of the liquid fertilizer production unit and supplying air and stirring and fermentation; It is characterized in that it comprises a purifying unit for receiving the separated supernatant is precipitated by using iron salt, sodium hydroxide, flocculant in order to flocculate the suspended matter and then supply air to remove the suspended matter floated on the water surface.

In addition, the liquid fertilizer production unit is a waste water storage tank for storing food waste waste water, a heated stirring tank for sterilizing various bacteria in the waste water by heating the waste water supplied from the waste water storage tank to a predetermined temperature or more, and heated by the heating stirring tank A three-phase separator for rotating the wastewater at high speed, a microbial reactor for fast fermentation by receiving the wastewater separated by the three-phase separator, a nitrogen remover for removing nitrogen contained in the wastewater in the microbial reactor, and the wastewater of the microbial reactor And a degassing tank for degassing the microbubbles present in the microorganism, a precipitation tank for precipitating and separating the microorganisms and the treated water generated in the microbial reactor, and a liquid ratio storage tank for temporarily storing the supernatant water separated from the precipitation tank.

In addition, the fermentation compost manufacturing unit, a blender for blending the liquid fertilizer supplied from the liquid fertilizer manufacturing unit and the coco peat transferred by the transfer conveyor, a compost stirring tank for supplying air to the solid material blended in the blender and stirred and fermented, It is characterized in that it consists of an automatic packaging machine to automatically weigh the compost and packaging automatically.

The purification unit may further include a chemical reaction tank for storing the supernatant water supplied from the liquid fertilizer production unit, an iron salt storage tank for storing iron salt supplied to the chemical reaction tank, and sodium hydroxide for supplying sodium hydroxide to the chemical reaction tank. A storage tank, a flocculant dissolver for dissolving the flocculant supplied to the chemical reaction tank at an appropriate concentration, a pressurized floatation tank receiving the treated water from the chemical reaction tank to remove suspended matter, and a treated water from which the suspended solids are removed from the pressurized floatation tank. It is characterized by consisting of a pressurized floatation treatment tank for temporarily storing, and a dehydrator for removing water contained in the sludge transferred from the pressurized floatation tank.

In addition, an oil treatment unit is connected to the three-phase separator of the liquid fertilizer manufacturing unit, and the oil treatment unit is an oil / water separation tank for removing water and fine sludge contained in the oil separated by the three-phase separator, and oil / water separation from the oil / water separation tank. Characterized in that it consists of an oil storage tank for temporarily storing the oil.

In addition, it is characterized in that the predetermined amount of the sludge separated in the sedimentation tank of the liquid ratio production unit is returned to the microbial reactor.

In addition, it is characterized in that for supplying the excess sludge separated by the dehydrator of the purification unit to the compost stirring tank of the fermentation compost production unit.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 is an overall process diagram of the wastewater treatment apparatus of the food wastewater recycling process according to the present invention, Figure 2 is a detailed configuration diagram showing the liquid fertilizer manufacturing unit of Figure 1, Figure 3 is a detailed configuration showing the fermentation compost production unit of Figure 1 4 is a detailed block diagram illustrating the purification unit of FIG. 1.

As shown in Figure 1, the wastewater treatment apparatus of the food wastewater recycling process according to the present invention by heating and stirring the wastewater generated during the food waste recycling process and rotating the heated wastewater at high speed to separate into oil, wastewater, sludge and the separation A liquid fertilizer manufacturing unit (1) for precipitating and separating the generated microorganisms and the treated water by high-speed fermentation of the wastewater, and the liquid ratio of the liquid fertilizer manufacturing unit (1) is supplied with a mixture of coco peat and supply air and stirred Fermentation compost manufacturing unit (2) for fermentation, and the supernatant water sedimented and separated in the course of the liquid fertilizer manufacturing unit (1) using iron salt, sodium hydroxide, flocculant in order to agglomerate the suspended solids and supply air to the water surface It includes a purifying unit (3) for removing the floating float.

Through the wastewater treatment device of the food wastewater recycling process configured as above, the wastewater generated in the process of refining the food waste is fermented into a liquid fertilizer or compost, and the supernatant water generated during the liquid fertilizer manufacturing process is purified through a separate purification facility. By recycling or discharging into water, it is possible not only to recycle food waste wastewater but also to prevent secondary environmental pollution.

As shown in FIG. 2, the liquid fertilizer manufacturing unit 1 heats the wastewater storage tank 11 in which food waste wastewater is stored, and the wastewater supplied from the wastewater storage tank 11 to a predetermined temperature or more. A heated stirring tank 12 for sterilizing various bacteria, a three-phase separator 13 for rotating the wastewater heated by the heated stirring tank 12 at high speed, and the wastewater separated by the three-phase separator 13 are supplied. A microorganism reactor 14 for fast fermentation, a nitrogen remover 141 for removing nitrogen contained in the wastewater in the microbial reactor 14, and a degassing tank for degassing microbubbles present in the wastewater of the microbial reactor 14 15, a precipitation tank 16 for sedimenting and separating the microorganisms and the treated water generated in the microbial reactor 14, and a liquid ratio storage tank 17 for temporarily storing the supernatant (liquid ratio) separated from the precipitation tank 16; It consists of.

The wastewater storage tank 11 temporarily stores the food wastewater generated in the food waste wastewater treatment process, and also serves as a flow adjusting tank. The wastewater storage tank 11 should be sized according to the variation of the influent wastewater and be able to temporarily store a flow rate exceeding the maximum amount of the planned day, and have a rectangular or square shape so as to uniformize the concentration of the wastewater. desirable.

The wastewater stored in the wastewater storage tank 11 is supplied to the heating stirring tank 12 by a transfer pump. The heating stirring tank 12 is provided with a stirring screw and the like to be heated while stirring the waste water therein, by supplying hot steam at about 145 ℃ to completely sterilize the germs in the waste water.

The fully sterilized wastewater in the heated stirring tank 12 is supplied to the three phase separator 13 by a pump.

The three-phase separator 13 separates the oil, waste water, and sludge into three stages by high speed rotation, and the three-phase separator 13 is connected to an oil treatment unit 18. The oil treatment unit 18 temporarily separates the oil-water separation tank 181 for removing water and fine sludge contained in the oil separated by the three-phase separator 13 and the oil-oil separated from the oil-water separation tank 181. It consists of an oil storage tank 182 for storing. The oil shipped by the oil treatment unit 18 may be used as an auxiliary material in various manufacturing fields.

Wastewater separated from the three-phase separator 13 is supplied to the flow adjustment tank 19, the sludge is supplied to the feed production facility.

The microbial reactor 14 is formed in a tower-like structure, the inner center is formed of a high-efficiency reactor in which both ends of the induction pipe is installed vertically and the nozzle is installed at the upper end.

Preferably, the microbial reactor 14 is installed at one or more, and continuously circulates the wastewater in the microbial reactor 14 by a pump.

In addition, a nitrogen remover 141 is connected to one side of the microbial reactor 14 to remove nitrogen contained in the wastewater in the microbial reactor 14.

The nitrogen remover 141 is a device for adsorbing and removing nitrogen dissolved in water by using an anion exchange resin, and when the exchange capacity of the ion exchange resin becomes saturated, the nitrogen component is no longer adsorbed. Restore the function by performing automatic repeat playback.

The treated water of the microbial reactor 14 is supplied to the degassing tank 15, the microbubble is present in the treated water due to the diffusion of air into the wastewater in the nozzle of the microbial reactor 14, This hinders the sedimentation of sludge (microbial mass) in the settling tank 16 for solid-liquid separation, so that air is blown by the blower 4 before entering the settling tank 16 so that fine bubbles can be easily degassed. .

The mixture of the microorganisms produced in the microbial reactor 14 and the treated water supplied from the degassing tank 15 is separated from the settling tank 16 and the settling sludge is returned to maintain the microorganisms in the microbial reactor 14. The supernatant is transferred to the liquid ratio storage tank 17. The fertilizer fermented in the liquor storage tank 17 is supplied to each demand destination.

As shown in FIG. 3, the fermentation compost manufacturing unit 2 includes a blender 22 that mixes the liquid fertilizer supplied from the liquid fertilizer manufacturing unit 1 and the cocoite transferred by the transfer conveyor 21. A compost agitation tank 23 for supplying air to the solid matter blended into the blender 22 for stirring and fermentation, and an automatic packing machine 24 for automatically weighing and automatically packaging fermented compost.

In addition to the above configuration, the hopper conveyor 25 for supplying quantitatively supplying the fermentation completed by the compost stirring tank 23 and the fermentation compost quantitatively transferred from the hopper conveyor 25 are constantly metered by the automatic packing machine 24. A hopper scale 26 is provided for later feeding.

The automatic packaging machine 24 is to use a packaging machine that is commonly used for feed packaging, such a detailed description will be omitted.

On the other hand, the excess sludge separated by the dehydrator 37 of the purification unit 3 can be supplied to the compost stirring tank 23 of the fermentation compost manufacturing unit 2. Therefore, by re-supplying the excess sludge to the compost manufacturing unit it is possible to increase the yield of the compost produced during the recycling process.

As shown in FIG. 4, the purification unit 3 stores a chemical reaction tank 31 for storing the supernatant water supplied from the liquid fertilizer production unit 1, and iron salt supplied to the chemical reaction tank 31. Coagulant dissolution for dissolving the iron salt storage tank 32, the sodium hydroxide storage tank 33 in which sodium hydroxide supplied to the chemical reaction tank 31 is stored, and the flocculant supplied to the chemical reaction tank 31 at an appropriate concentration. Pressurization 34 for supplying the treated water from the chemical reaction tank 31, and the pressurized floatation tank 35 to remove the suspended matter, and the pressurized water for temporarily storing the treated water from which the suspended matter is removed. The floatation treatment tank 36 and the dehydrator 37 which removes the water contained in the sludge conveyed from the said pressure flotation tank 35 are comprised.

Before supplying the supernatant water supplied from the liquid ratio production unit 1 to the chemical reaction tank 31, it is preferable to temporarily store the water by the flow rate adjusting tank 38 and then supply the chemical reaction tank 31 by a pump.

The chemical reaction tank 31 is supplied with iron salt, sodium hydroxide, flocculant, etc. sequentially, and iron salt is supplied to facilitate the sludge flocculation and the acidity decreases in the process, in which case sodium hydroxide is supplied again for secondary flocculation. Increase acidity

Iron salts stored in the iron salt storage tank 32 is characterized in that any one of ferrous salts, ferric salts.

Finally, after the flocculant is supplied, the flocculant dissolver 34 is dissolved at an appropriate concentration. One side of the chemical reaction tank 31 is connected to the pressurized tank 311 to allow air to saturate in water into the chemical reaction tank 31.

The treated water of the chemical reaction tank 31 is supplied to the pressurized floatation tank 35, and the pressurized floatation tank 35 removes the suspended matter contained in the treated water to float on the water surface.

The pressurization tank (35) includes a circulation pump (351) for circulating the treated water saturated with air to the pressurization tank (35), and an air compressor for supplying compressed air in the pressurization tank (35). 352 is connected and installed.

The sludge generated in the pressurized floatation tank 35 is temporarily stored in the sludge storage tank 39 and then transferred to the dehydrator 37, and the fermentation compost manufacturing unit is formed by removing moisture contained in the sludge by the dehydrator 37. It is supplied to the compost stirring tank 23 of 2).

The treated water of the pressurized floatation treatment tank 36 is discharged after the applied treatment by selecting one of membrane and ozone treatment biological treatment according to the site characteristics.

While the present invention has been described with reference to the accompanying drawings, it will be apparent to those skilled in the art that many various obvious modifications are possible without departing from the scope of the invention from this description. Therefore, the scope of the invention should be construed by the claims described to include examples of many such variations.

1 is an overall process of the wastewater treatment apparatus of the food wastewater recycling process according to the present invention.

Figure 2 is a detailed configuration diagram showing a liquid ratio manufacturing unit of FIG.

Figure 3 is a detailed configuration diagram showing the fermentation compost manufacturing unit of FIG.

4 is a detailed block diagram showing a purification unit of FIG.

<Explanation of symbols for the main parts of the drawings>

1: liquid fertilizer manufacturing unit

    11: wastewater storage tank

    12: heating stirring tank

    13: three phase separator

    14: microbial reactor

         141: nitrogen remover

    15: degassing tank

    16: settling tank

    17: liquid storage tank

    18: oil treatment part

         181: oil separation tank, 182: oil storage tank

    19: flow adjustment tank

2: fermentation compost manufacturing department

    21: conveying conveyor

    22: blender

    23: compost stirring tank

    24: automatic packing machine

    25: Hopper Conveyor

    26: Hopper Scale

3: purification unit

    31: chemical reaction tank

         311: pressurized tank

    32: iron salt storage tank

    33: sodium hydroxide storage tank

    34: flocculant dissolver

    35: pressure injury

         351: circulation pump, 352: air compressor

    36: Pressurized floatation treatment tank

    37: dehydrator

    38: flow adjustment tank

    39: sludge reservoir

4: blower

Claims (7)

Preparation of liquid fertilizer for heating and stirring wastewater generated during food waste recycling and separating the heated wastewater into oil, wastewater and sludge by high speed rotation and precipitating and separating the generated microorganism and treated water by high speed fermentation of the separated wastewater by microorganisms. In the process of the fermentation compost manufacturing unit (2) and a fermentation compost manufacturing unit (2) for receiving a portion of the liquid fertilization of the liquid fertilizer production unit (1), mixes the cocopite and supplies air to stir fermentation; It includes a purification unit (3) for receiving the precipitated supernatant water to agglomerate the suspended matter using iron salt, sodium hydroxide, flocculant in turn and then supply air to remove the suspended matter floated on the water surface, The liquid fertilizer manufacturing unit 1 is a waste water storage tank 11 in which food waste waste water is stored and a heated stirring tank for sterilizing various germs in the waste water by heating the waste water supplied from the waste water storage tank 11 to a predetermined temperature or more ( 12), a three-phase separator 13 for rotating the wastewater heated by the heated stirring tank 12 at high speed, and a microbial reactor 14 for fast fermentation by receiving the wastewater separated by the three-phase separator 13. And a nitrogen remover 141 for removing nitrogen contained in the wastewater in the microbial reactor 14, a degassing tank 15 for degassing microbubbles present in the wastewater of the microbial reactor 14, and the microbial reactor. Food wastewater recycling process comprising a sedimentation tank (16) for sedimenting and separating the microorganism and the treated water produced in the (14), and a liquid rain storage tank (17) for temporarily storing the supernatant separated from the sedimentation tank (16) A waste water treatment apparatus. delete The fermentation compost manufacturing unit (2) is a blender (22) for blending the liquid fertilizer supplied from the liquid fertilizer production unit (1) and the coco peat transferred by the transfer conveyor (21), and the blender ( Food wastewater recycling process characterized in that it comprises a compost agitation tank 23 for supplying air to the solids blended in 22) and stirred and fermented, and an automatic packaging machine 24 for automatically weighing and automatically fermenting the fermented compost. Wastewater treatment device. According to claim 1, wherein the purification unit 3 is a chemical reaction tank 31 for storing the supernatant water supplied from the liquid fertilizer manufacturing unit 1, and iron salt storage in which the iron salt supplied to the chemical reaction tank 31 is stored A coagulant dissolvers for dissolving a tank 32, a sodium hydroxide storage tank 33 in which sodium hydroxide supplied to the chemical reaction tank 31 is stored, and a coagulant supplied to the chemical reaction tank 31 at an appropriate concentration ( 34), a pressurized floatation tank (35) for receiving the treated water from the chemical reaction tank (31) to remove the suspended matter, and a pressurized floatation treated water tank for temporarily storing the treated water from which the suspended matter is removed from the pressurized floatation tank (35). And a dehydrator (37) for removing water contained in the sludge conveyed from the pressurization tank (35). The oil phase treatment unit 18 is connected to the three-phase separator 13 of the liquid fertilizer manufacturing unit 1, and the oil treatment unit 18 is included in the oil separated by the three-phase separator 13. An oil and water separation tank 181 for removing the water and fine sludge, and an oil storage tank 182 for temporarily storing oil and oil separated from the oil and water separation tank 181. Wastewater treatment device. The wastewater treatment apparatus according to claim 1, wherein a predetermined amount of sediment sludge separated from the sedimentation tank (16) of the liquid fertilizer production unit (1) is returned to the microbial reactor (14). The excess sludge separated by the dehydrator 37 of the said purification part 3 is supplied to the compost stirring tank 23 of the said fermentation compost manufacturing part 2, The said sludge of Claim 3 or 4 characterized by the above-mentioned. Wastewater treatment device of the food wastewater recycling process.

Images