KR20200101663A - Equipment capable of filtering of livestock wastewater and cleaning of membrane - Google Patents

Abstract

The present invention relates to a treatment device that performs a separation process for liquid manure or treated water generated by treating livestock manure, livestock wastewater, or livestock washing water, and to a livestock wastewater filtering device using a porous ceramic separator capable of automatic washing the inside of the treatment device. A device capable of filtering livestock wastewater and washing a filtration membrane according to the present invention is a device for filtering liquid manure obtained by biological treatment of livestock wastewater, and includes: at least one filtration tank for filtering the liquid manure; and at least one washing tank connected to the filtration tank through at least one pipe, wherein a plurality of porous ceramic separators are disposed inside the filtration tank. Moreover, the filtration tank sends the filtered filtrate to the washing tank, and sends washing water from the washing tank to the filtration tank to wash the inside of the filtration tank.

Description

Equipment capable of filtering of livestock wastewater and cleaning of membrane {Equipment capable of filtering of livestock wastewater and cleaning of membrane}

The present invention relates to a treatment device that undergoes a separation process for liquid manure or treated water generated by treating livestock manure, livestock wastewater, or livestock washing water, and a livestock wastewater filtering device using a porous ceramic separator capable of automatic washing inside the treatment device. .

Conventional treatment methods for livestock manure, livestock wastewater or livestock washing water include various types of physicochemical unit treatment processes and biological treatment processes, and have been used in combination with unit processes depending on the purpose of treatment. However, the existing treatment method is composed of a process that excludes efficient use of resources by focusing on the efficiency of purification treatment of livestock manure. In addition, as the standards for discharging livestock manure, livestock wastewater, or livestock washing water become strict, the treatment is complicated to meet them, and it is combined with processes that are difficult to operate and maintain, resulting in an expensive treatment process. As the efficient combination of individual processes becomes difficult, the use of energy becomes inefficient, and throughput is reduced compared to operating time. In addition, the recycling rate is also very low due to the limitation on purification efficiency.

Accordingly, livestock manure, livestock wastewater, or livestock treated water is produced through the production of liquid manure by applying an advanced separation membrane process to biological treatment of various aerobic or anaerobic processes rather than a method that relies on simple purification through various biological treatment processes. There is a demand for a method of environmentally friendly treatment through recycling or discharging.

However, there is a problem in that eutrophication occurs again due to the liquid manure or sludge in the treated water after a long period of time, even if the liquid manure or treated water passes environmental standards.

Korean Patent Laid-Open Publication No. 10-2008-0097779 discloses a technology for producing liquid manure by treating livestock manure, but the technology for producing liquid manure by treating livestock manure is widely popularized, and in particular, for utilizing biologically treated liquid manure. Purification technology is not common.

Republic of Korea Patent Publication 10-1393712 discloses a technology for treating liquid manure produced by biological treatment of livestock wastewater through a separator tank, an activated carbon filter tank, and a reverse osmosis pressure device, but the facility itself is too large and complex, so its effectiveness is poor.

In recent years, technologies for purifying liquid manure as well as the above-described conventional technologies are being developed, but in reality, purification technologies capable of producing liquid manure discharged or reprocessed after liquid manure purification are different from reality, so the treatment of manure and wastewater in livestock farms is still a task to be solved. What remains is reality.

Republic of Korea Patent Publication 10-2008-0097779 Republic of Korea Patent Publication 10-0956120 Republic of Korea Patent Publication 10-1393712 Republic of Korea Patent Publication 10-1806489

The technical problem to be solved by the present invention is a liquid manure filtration device that eliminates the cause of eutrophication by removing sludge in liquid manure or treated water, and prevents eutrophication even if the treated liquid manure or treated water is stored or discharged for a long time. To provide.

In addition, it is to maximize the purification efficiency of biologically treated liquid manure by using a plurality of porous ceramic separators and controlling pressure and flow rate.

In addition, by using a filter tank having a plurality of porous ceramic membrane structures and a separate cleaning tank, it is possible to automate the cleaning of the liquid manure filter, and to provide a liquid manure filter capable of purifying a large amount of liquid manure within a predetermined time. .

However, the technical problem to be solved by the present invention is not limited to the above problem, and may be variously extended without departing from the spirit and scope of the present invention.

The device capable of filtering livestock wastewater and washing the filtration membrane according to the present invention is a device for filtering liquid manure obtained by biological treatment of livestock wastewater, and includes at least one filtration tank for introducing and filtering the liquid manure, and the filter tank and at least one pipe. It includes at least one washing tank connected through, and a plurality of porous ceramic separation membranes are disposed inside the filtering tank, and the filtering tank sends the filtered filtrate to the cleaning tank, and sends washing water from the cleaning tank to the filtering tank to the inside of the filtering tank It is characterized in that it is made to wash.

Here, it is preferable that the filtration tank has a structure capable of receiving a constant pressure inside the connection pipe caps are flange-coupled at the top and bottom.

Here, the filtrate discharged to the outside through the ceramic separation membrane is introduced into the washing tank under a constant pressure in the filter tank, and the unfiltered liquid may be fed back and recovered.

Here, the filtrate discharged to the outside through the ceramic separation membrane under a constant pressure in the filtration tank is introduced into the cleaning tank, and the cleaning liquid or filtrate of the cleaning tank is backwashed into the filtration tank under a constant pressure in a reverse direction by a motor. The inside of the filtration tank can be washed.

Here, the upper and lower ends of the ceramic separator are coupled in contact with the flange of the filtration tank, and the treated water purified through the pore size of the ceramic separator is discharged while the livestock wastewater passes according to the generation of a predetermined pressure, and untreated The concentrated water may be discharged through the undiluted solution passage hole of the ceramic separation membrane.

Here, the four filtration tanks are arranged in a square shape, and it is preferable that adjacent filtration tanks are connected in series with each other at the top or bottom by a series connection pipe.

Since sludge is removed from the liquid manure or effluent produced using the method and treatment device of livestock manure, livestock wastewater or livestock washing water using a porous ceramic separator according to embodiments of the present invention, the cause of eutrophication is thus prevented. Even if the liquid manure is removed and stored for a long time or discharged, secondary eutrophication does not occur, which can help improve the environment.

In addition, it is possible to maximize the purification efficiency and purification amount of the biologically treated liquid manure by utilizing a plurality of porous ceramic separators and cleaning tanks, and it may be possible to automate the cleaning of the liquid manure filter in the filtration tank.

1 is a flow chart showing a liquid manure purification process through liquid manure production of livestock manure using a device capable of filtration of livestock wastewater and washing of a filtration membrane according to the present invention.
2 is a block diagram of an apparatus capable of filtering livestock wastewater and cleaning a filtration membrane according to the present invention.
3 is a plan view of an apparatus capable of filtering livestock wastewater and washing a filtration membrane according to the present invention.
Figure 4 is a pipe connection structure diagram of a device capable of filtering livestock wastewater and cleaning a filtration membrane according to the present invention.
5 is a diagram illustrating a pipe connection structure of a liquid non-filtration device among devices capable of filtering livestock wastewater and cleaning a filtration membrane according to the present invention.
6 is a perspective view of a filtration tank including a plurality of porous ceramic separators applied to the liquid rain filtration apparatus according to the present invention.
7 is a perspective view of a plurality of porous ceramic separator modules applied to the liquid rain filtration apparatus according to the present invention.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, only these embodiments make the disclosure of the present invention complete, and common knowledge in the technical field to which the present invention pertains. It is provided to completely inform the scope of the invention to those who have, and the invention is only defined by the scope of the claims.

The terms used in this specification are for describing exemplary embodiments, and are not intended to limit the present invention. In this specification, the singular form also includes the plural form unless specifically stated in the phrase. As used in the specification, "comprises" and/or "comprising" refers to the presence of one or more other components, steps, actions and/or elements, and/or elements, steps, actions and/or elements mentioned. Or does not exclude additions.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used as meanings that can be commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in a commonly used dictionary are not interpreted ideally or excessively unless explicitly defined specifically.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. The same reference numerals are used for the same elements in the drawings, and duplicate descriptions for the same elements are omitted.

In the present invention, after performing a biological treatment of one or more mixtures of livestock manure, livestock wastewater, or livestock washing water by a microorganism removal method, the produced liquid manure or sludge of the treated water is a porous ceramic separator device (liquid non-filtration device). The main technical feature is to filter/separate/concentrate using.

Conventionally, livestock manure or livestock wastewater is treated in a storage tank-flow rate adjustment tank- anoxic tank-aerobic tank (liquidization tank), and then sprayed as liquid manure after precipitation and dehydration, or discharged to rivers. Was processed.

However, in the existing treatment method, even if the liquid manure or discharged water meets the environmental standards at the time of discharge, if a long period elapses after spraying or discharge, an odor occurs in the river due to eutrophication of the sludge, and as a result, the state of liquid manure or discharge is out of environmental standards. do. In order to solve this problem, an object of the present invention is to remove the cause of eutrophication by removing the sludge of the liquid manure or the discharged water through a filtration/concentration treatment process using a ceramic separator for liquid manure, treated water, and discharged water. When sludge is removed from liquid manure or discharged water, eutrophication does not occur even if it is stored or discharged for a long time.

In addition, the livestock wastewater defined in the present invention refers to liquid or solid contaminated water generated by livestock breeding, and may be used as a concept including livestock manure and washing water for livestock. It refers to wastewater that has high concentrations of organic matter, nitrogen and phosphorus and can be treated by biological treatment methods.

First, in the present invention, a process of forming liquid manure or effluent before filtering treatment using a porous ceramic separator will be described, and the present invention will be described in step 3.

Liquid manure or discharged water is (1) treated first using a contaminant treatment machine and a centrifugal dehydrator, (2) a second treatment in a biological process, and (3) filtered and precipitated through a separation process to collect liquid manure, discharge, and treated water. It is formed through three stages of advanced processing (third processing) to be produced.

1 is a flow chart showing a liquid manure purification process through liquid manure production of livestock manure using a liquid manure filtration device according to the present invention.

As shown in FIG. 1, the first treatment step is to remove solids from livestock manure, livestock wastewater or livestock washing water after introducing livestock manure, livestock wastewater, livestock washing water, or mixed impurities thereof to the treatment plant (S1). It consists of a process through the processor (S2) and centrifugal dehydrator (S3).

The second treatment step is a step of biologically treating (S4) livestock manure, livestock wastewater, or livestock washing water that has passed the first treatment step to produce liquid manure.

In the advanced treatment (third treatment) step, livestock manure, livestock wastewater or livestock washing water that has passed through steps S2, S3, S4 is finally treated with a liquid non-filtration device including a filtration tank of a porous ceramic membrane (CMF) (S5). This is a post-treatment step consisting of discharging water (S7) or producing purified liquid manure (S6).

Here, the present invention may mean a step of purifying the biologically treated liquid manure which is an advanced treatment (third treatment) step.

The first processing steps S2 and S3 are as follows.

If livestock manure, livestock wastewater, or livestock washing water is fed into the impurity treatment unit through the feeder, the impurity treatment device contacts the animal manure or livestock wastewater to the outer circumference of the rotating grid-shaped drum, and the liquid component escapes through the gap of the grid. Solids over 6mm are attached to the outer circumference of the drum and separated from the cylinder before being discharged.

The impurities separated by filtration from the screen of the impurities treatment machine are compressed and transported to a screw with a porous cylinder for dehydration. In the impurity treatment process, about 10-15% of solids contained in manure are removed. The treated water that has passed through the contaminant treatment machine is sent to the centrifugal dehydrator.

The centrifugal dehydrator separates the solid-liquid mixture flowing from the bottom of the device using centrifugal force. The dehydration-separated sand and seeds are discharged to the lower side opposite the inlet side, and the desorbed liquid component is discharged to the lower inlet side. Here, 35-45% of fine solids contained in livestock manure or livestock wastewater are removed.

In the first treatment step (S2, S3), an impurity treatment and a centrifugal dehydrator are used to remove impurities contained in livestock manure, livestock wastewater or livestock washing water, and some ammonia nitrogen, volatile substances, hardly decomposable substances, and fine solids. To facilitate the biological treatment of

The second processing step S4 is as follows.

Livestock manure, livestock wastewater or livestock washing water that has undergone the first treatment steps S2 and S3 is subjected to a second treatment step, which is a biological treatment S4. The second processing step will be described through two preferred embodiments.

The first embodiment is a general activated sludge process, a continuous batch process, and a high-temperature aerobic digestion process among aerobic processes.

Activated sludge process is a method of aerobic decomposition by flowing only liquid waste through a centrifuge from a treatment tank with manure mixed into the activated sludge. Air is strongly injected to allow microorganisms to decompose organic matter in the treated water in an aerobic state. That's the way.

The continuous batch process is a process in which inflow and outflow of treated water occurs in a single reaction tank. Each unit process occurs continuously according to a set time arrangement. In other words, it is a process in which the reaction proceeds in the order of a fill process, a reaction process, a settle process, a draw process, and an idle process.

The high-temperature aerobic digestion process is a method of decomposing organic matter while mixing and simultaneously supplying oxygen in the reactor using a self-priming aeration/stirring machine, and a method of supplying oxygen while circulating the lower internal water upwards by an external circulation pump. When high-efficiency oxygen is delivered by injection, the high-temperature semi-aerobic conditions are maintained, and the pH rises due to the generation of NH ₄ ⁺ -N by the generation of CO ₂ and the decomposition of proteins, thereby acting as a nitrogen removal mechanism.

The second embodiment is an anaerobic digestion process among anaerobic processes. Anaerobic treatment is a method of sequentially treating the steps of hydrolysis, acid generation, and methane production using floating, stationary, and expanded-bed microorganisms in the absence of oxygen. More specifically, anaerobic digestion is a hydrolysis step in which large and complex soluble and insoluble molecules are decomposed into smaller molecules and transferred into the cell and paid for, and this product is fermented into organic acids and other low-molecular compounds, hydrogen, carbon dioxide, etc. This fermentation process consists of an acid generation step in which acetic acid, which is an initial product of the fermentation process, is produced by microbiological decomposition of hydrolysis products, and a methanogenesis step in which acetic acid, which is the main product of the acid production step, is fermented into methane and carbon dioxide.

In this biological process, pathogens and their mediums are destroyed, and at the same time, a significant portion of the organic matter in the sludge is liquefied and produced as gas, thereby reducing or stabilizing the sludge.

The third processing steps S5, S6, and S7 are as follows.

The treated water (liquid fertilizer) that has undergone the biological treatment (S4) step is finally filtered/separated/concentrated using a liquid rain filtration device including a filtration tank of a porous ceramic separator, which is a post-treatment process, to produce liquid manure, discharged water, and treated water.

In the treatment process (S5) by a liquid non-filtration device, it is formed of a continuous porous ceramic membrane in the inner flow path, and by controlling the linear velocity, a strong shear force is generated on the porous ceramic separator in the inner flow path, causing fouling of the membrane. ), and thereby significantly increasing the amount of treated water passing through the separation membrane, the overall treatment capacity is increased, and high removal efficiency of more than 99% and high-quality liquid manure production and discharged or treated water can be expected.

2 is a block diagram of an apparatus capable of filtration of livestock wastewater and washing of a filtration membrane according to the present invention, and FIG. 3 is a plan configuration diagram of an apparatus capable of filtration of livestock wastewater and cleaning of a filtration membrane according to the present invention.

2 and 3, the liquid manure purification system according to the present invention includes an undiluted liquid ratio storage tank 101, a filtrate storage tank 103, a washing liquid storage tank 105, and a liquid manure filtration device 200. It can be configured.

A separate manure tank (strainer device) may be further provided at the front end of the undiluted liquid ratio storage tank 101, and the liquid manure filtration device 200 includes the first and second motors 201 and 203, the frame 205, and the filtration tank 207 and a cleaning tank 209 may be included.

The manure tank (strainer device, not shown) may be a pretreatment device capable of filtering out sludge, etc., contained in liquid manure introduced from the raw liquid manure storage tank produced by collecting and processing livestock manure, etc. by size.

If the first motor 201 is a power source for introducing liquid manure, the second motor 203 plays a role of generating and separating a constant pressure so that the introduced liquid manure can be filtered in the filtration tank 207 in the liquid manure filtration device 200. The washing water can be backwashed in the washing tank 209 in the reverse direction, so that the debris in the filtering tank 207 can be washed.

The raw liquid ratio storage tank 101 is a tank in which biologically treated liquid manure is stored, and the filtrate storage tank 103 is a tank for storing the filtrate filtered through the filtration tank 207 of the liquid manure filtration device 200, and the cleaning liquid The storage tank 105 is a tank in which a cleaning liquid capable of cleaning the inside of the filtration tank 207 of the liquid rain filtration device 200 is stored. These raw liquid ratio storage tanks 101, filtrate storage tanks 103, and washing liquid storage tanks 105 are connected to flow in and out through a pipe, respectively.

The liquid manure filtration device 200 refers to a device capable of purifying liquid manure by introducing biologically treated liquid manure or liquid manure that has been first or secondarily fertilized.

The liquid manure is introduced into the liquid manure filtration device 200 through the raw liquid ratio storage tank 103, and the liquid manure purified through the liquid manure filtration device 200 is discharged to the filtrate storage tank 103, and periodically or aperiodically. It is composed of a system that can clean the inside of the filtration device 200 by inflowing the cleaning liquid from the cleaning liquid storage tank 105, and such inflow, outflow, cleaning, and water cleaning are carried out in a control panel (not shown) with a built-in operating program. It can be automatically set and operated by

The liquid rain filtration apparatus 200 may include first and second motors 201 and 203, a filtering tank 207, and a washing tank 209.

The filter tank 207 may be composed of four, but the number may be increased or decreased depending on the treatment capacity, and a plurality of ceramic separators may be built in the filter tank 207.

The cleaning tank 209 functions similarly to the cleaning liquid storage tank 105, but the cleaning tank 209 itself is directly or indirectly connected to the filtering tank 207 by a pipe, and is backwashed by the drive of a motor. Allows cleaning of clogged holes in ceramic separators.

4 is a pipe connection structure diagram of a device capable of filtration of livestock wastewater and cleaning of a filtration membrane according to the present invention, and FIG. 5 is a pipe connection structure diagram of a liquid non-filtration device among devices capable of filtration of livestock wastewater and cleaning of a filtration membrane according to the present invention. to be.

The liquid rain filtration apparatus according to the present invention uses a porous ceramic separator as a filtration tank.

A plurality of porous ceramic separators are disposed in a circular filtration tank using upper and lower flanges, and a predetermined pressure is applied from the lower side to the upper side, so that a liquid smaller than the pore diameter of the ceramic separator is filtered, and more impurities are caught and discharged.

The porous ceramic separator is sintered with alumina, titania, or zirconia at very high temperatures, and generally has an asymmetric structure with a porous supporting active membrane layer.

The macroporous support ensures mechanical resistance, while the active layer is capable of separating microfiltration, ultrafiltration, and nanofiltration. Ceramic separators always operate in cross flow mode.

The turbid fluid passes through the separation membrane layer inside the channel at high speed. The clean liquid containing fine molecules driven by the ceramic membrane transverse pressure (TMP) passes through the ceramic membrane layer and moves vertically into the permeation, and solids and molecules larger than the pore size of the ceramic membrane are rejected from the retentate. Therefore, the supply fluid is purified, concentrated, and purified to remove sludge from livestock manure, livestock wastewater, or livestock treated water, which are factors that will undergo secondary eutrophication after undergoing physicochemical unit treatment processes and biological treatment processes. .

In addition, by using a filter tank having a porous ceramic separator structure, an operator has the advantage that it is possible to automatically clean without the need for washing or washing by manually removing the filter from the filter tank.

Conventional filtration tanks for purifying biologically treated liquid manure such as livestock manure use an ultrafiltration membrane, a microfiltration membrane or a reverse osmosis membrane, but such a filtration membrane is a semipermeable membrane, and it is possible to finely separate the molecular size of the target material according to the size of the compound. Since the filtration membrane is small and has dense micropores, the filtration membrane is melted or damaged when cleaning with a cleaning solution, making automatic cleaning impossible.

However, the porous ceramic separator used in the present invention is formed in a single cylinder as shown in FIG. 6, and has a very fine pore diameter in the cylinder, so it can function as a filtration membrane, and separation is required. It can have a structure capable of automatic cleaning by inputting a cleaning solution without it.

In particular, it has the advantage that it is possible to automatically clean the inside of the liquid manure filter without the need for the operator to directly clean the impurities that are very difficult to treat such as livestock manure.

4 and 5, the biologically treated liquid manure stored in the raw liquid ratio storage tank 101 is introduced into the filter tank 207 through the raw liquid supply pipe 301 and the inlet pipe 303.

The ratio of the raw liquid introduced into the filtration tank 207 is filtered by a ceramic separator, and the filtrate is discharged through the filtrate discharge pipe 309, and the unfiltered raw liquid is returned to the inside of the filtration tank 207 through the feedback pipe 305. It is brought in.

The filtered filtrate may be introduced into the washing tank 209, and may be introduced into the filtrate storage tank 103 or the washing liquid storage tank 105 through the filtrate recovery pipe 313.

A separate washing liquid may be filled in the washing liquid storage tank 105, or filtered water may be filled.

The unfiltered liquid that has not been filtered through the filtration tank 207 may be recovered back to the stock liquid ratio storage tank 101 through the unfiltered component recovery pipe 311.

The four filtering tanks 207 may have a structure that is sequentially connected in series by a series connection pipe 307.

The washing liquid can be injected into the washing tank 207 through the washing pipe input pipe 315, and the washing water is supplied through the filtrate storage tank 103 and the washing water supply pipe 317 connected in parallel with the washing liquid storage tank 105. 207) It is possible to clean the clogged holes of the ceramic separator under constant pressure by putting it inside. The washed debris may be recovered to the undiluted liquid ratio storage tank 101 through the backwash pipe 319.

Referring to FIG. 5, four filtering tanks 207 and two cleaning tanks 209 may be arranged side by side by two.

Each of the four filtration tanks 207 includes a plurality of ceramic separators, and a connection pipe cap 211 is connected at the top and bottom through a flange 213 to apply a constant pressure therein.

The four filtering tanks 207 may be connected in series to each other through a series connection pipe 307.

Four filtration tanks 207 are connected up and down by a filtrate discharge pipe 401, and the filtrate discharge pipe 401 is connected to a discharge pipe connection pipe 403, a vertical connection pipe 405, a horizontal connection pipe 407, and a washing tank. It is connected by the pipe 409 so that the filtrate can flow into the washing tank 209.

In addition, the cleaning tank 209 is connected by the filtering tank 207 and the pipes 401, 403, 405, 407, 409, and the cleaning liquid (or filtrate) is transferred to the inside of the cleaning tank 209 with strong pressure by the reverse driving of the motor. ) Is backwashed to clean the blockage in the ceramic separation membrane hole in the filtration tank 207.

6 is a perspective view of a filtration tank including a plurality of porous ceramic separators applied to a liquid rain filtration device according to the present invention, and FIG. 7 is a perspective view of a plurality of porous ceramic separator modules applied to a liquid rain filtration device according to the present invention.

6 and 7, the filtering tank 207 is made of a metal tube, and flanges 211 are formed at the top and bottom, respectively.

Each of the upper and lower flanges 211 is connected to and sealed with the connection pipe cap 213 on the upper and lower sides, and has a shape to confine the pressure in the filtering tank 207.

The filtering tank 207 may include a plurality of porous ceramic separators 207c of FIG. 7.

A gasket groove 207d may be formed in each of the upper and lower flanges 211 for sealing.

The treated water (liquid ratio) treated through the biological treatment (S4) process is introduced into the filtration tank 207 through the inlet of the liquid manure filter. The introduced liquid manure is filtered/separated/concentrated by the porous ceramic separation membrane included in the filtering tank 207, and the treated water (purified material) passing through the porous ceramic separation membrane is passed through the filtrate outlet pipe to the washing tank 209 and the filtrate. Concentrated water that has been discharged to the storage tank 103 and has not passed through the porous ceramic separator is recovered to the raw liquid ratio storage tank 101 through the concentrated water outlet pipe.

The filter tank 207 can apply a constant pressure to the ceramic separation membrane 207c therein by the structure of the connection pipe cap 213 and the flange 211.

When a certain pressure is present, the ratio of the stock solution passing through the stock solution passage hole 503 of the ceramic separation membrane 207c passes through the pores finely formed in the sidewall of the ceramic separation membrane 207c, and the filtered water is sufficiently outside the ceramic separation membrane 207c. Can be discharged.

Since the undiluted liquid ratio has a very large particle size, the undiluted solution passage hole 503 of the ceramic separation membrane 207c is blocked by the liquid manure sludge after a certain period of time.

The clogging of the undiluted solution passage hole 503 not only lowers the efficiency of filtration of the undiluted solution ratio, but also causes a problem in that filtration cannot be performed at the source.

To solve this problem, in the present invention, the filtering tank 207 and the cleaning tank 209 are connected to each other by a pipe, and washing water (washing water, filtrate) is transferred from the cleaning tank 209 to the filtering tank 207 at every necessary cycle. By backwashing, the undiluted solution passage hole 503 of the ceramic separation membrane 207c may be washed, and in particular, the washing effect may be further increased due to a structure in which pressure is applied in the filter tank 207 during backwashing.

Looking at the structure of the porous ceramic separator 207c with reference to FIG. 7, the porous ceramic separator 207c has a ceramic body 501 in the shape of a long cylindrical tube, and a stock solution passing hole 503 which is a plurality of through holes is formed therein. do.

The ceramic body 501 is manufactured through a sintering process, and the body has a structure in which pores having a plurality of pores are formed so that liquid manure can be purified and discharged from the inside to the outside.

As shown, the liquid manure 505 passing through the stock solution passing hole 503 of the porous ceramic separation membrane 207c by receiving a constant pressure is the treated water 507 filtered through the pores while passing through the stock solution passing hole 503 Is discharged to the outside of the ceramic body 501 and the unrefined concentrated water 505 passes through the undiluted solution passage hole 503 as it is to be discharged.

Biologically treated water has many operational problems with conventional separation membrane treatment technology due to its high solids concentration, but porous ceramic separation membrane technology shows stable operation capability even under high solids concentration.

The influent water introduced into the ceramic separator passes through the separator and is separated into final treated water and concentrated water. The final treated water is of very good quality and can be reused as liquid manure, washing water, landscape water, and boiler water. The treated water exceeding the reuse capacity may be discharged (S7).

In the present invention, when performing a filtration/separation/concentration treatment process for liquid manure (S6) or livestock wastewater or livestock washing water, a filtration/separation/concentration treatment process is performed using a ceramic separator, and such a porous ceramic separator has a pore diameter ( Pore size) is 20nm to 80nm. The result of treating the liquid manure (S6) using a porous ceramic separator having a pore size of 50 nm is as follows.

Processing result inspection data according to the present invention Inspection items Inspection standard result Remark Total amount of nitrogen (%) Total amount of nitrogen, total amount of phosphate, total amount of Gari, total amount of each component: 0.3 or more 0.17 Analysis method
Fertilizer quality inspection method

standard
Rural Development Administration notice
No. 2016-26 Total amount of phosphate (%) 0.39 Total amount (%) 0.51 moisture (%) More than 95 95.43 Salinity (%) 0.3 or less 0.27 Lead (mg/kg) 15 or less 0.065 Chromium (mg/kg) 30 or less 0.40 Zinc (mg/kg) 130 or less 128.89 Mercury (mg/kg) 0.2 or less 0.018 Arsenic (mg/kg) 5 or less 0.14 Cadmium (mg/kg) 0.5 or less Not detected Nickel (mg/kg) 5 or less 0.63 Copper (mg/kg) 50 or less 41.99 Coli O157:H7 Not detected Not detected Salmonella Not detected Not detected

Although the embodiments of the present invention have been described with reference to the accompanying drawings, those of ordinary skill in the art to which the present invention pertains can be implemented in other specific forms without changing the technical spirit or essential features. You can understand. Therefore, it should be understood that the embodiments described above are illustrative and non-limiting in all respects.

101: undiluted liquid ratio storage tank 103: filtrate storage tank
105: washing liquid storage tank 200: filtration device
201: first motor 203: second motor
205: outer frame 207: filtration tank
209: washing tank 211: connection pipe cap
213: flange 301: undiluted solution supply pipe
303: entrance hall 305: feedback hall
307: series connection pipe 309: filtrate discharge pipe
311: unfiltered matter recovery pipe 313: filtrate recovery pipe
315: washing water input pipe 317: washing water supply pipe
319: backwash pipe 401: filtrate discharge pipe
403: discharge pipe connector 405: vertical connector
407: horizontal connection pipe 409: washing tank connection pipe

Claims (6)

It is a device that filters liquid manure obtained by biological treatment of livestock wastewater,
At least one filtration tank for filtering by introducing the liquid manure,
It comprises at least one washing tank connected through the filter tank and at least one tube,
Inside the filtration tank, a plurality of porous ceramic separators are disposed,
The filtration tank sends the filtered filtrate to the cleaning tank, and sends the cleaning water from the cleaning tank to the filtration tank to wash the inside of the filtration tank, a device capable of filtering livestock wastewater and cleaning the filtration membrane. The method of claim 1,
The filtration tank is a device capable of filtration of livestock wastewater and cleaning of the filtration membrane, having a structure capable of receiving a constant pressure inside the connection pipe caps are flange-coupled at the top and bottom. The method of claim 1,
A device capable of filtering livestock wastewater and cleaning the filtration membrane, wherein the filtrate inside the filtration tank is fed into the cleaning tank under a constant pressure and the filtrate discharged to the outside through the ceramic separation membrane is fed back and recovered. The method of claim 1,
The filtrate discharged to the outside through the ceramic separator under a constant pressure inside the filtration tank is introduced into the cleaning tank,
A device capable of filtration of livestock wastewater and cleaning of a filtration membrane by washing the inside of the filtration tank by backwashing the cleaning liquid or filtrate of the cleaning tank in a reverse direction by a motor under a constant pressure inside the filtration tank. The method of claim 1,
The upper and lower ends of the ceramic separator are coupled in contact with the flange of the filtration tank,
As the livestock wastewater passes according to the generation of a predetermined pressure, the purified treated water is discharged through the pore size of the ceramic separator, and the untreated concentrated water is discharged through the undiluted solution passage hole of the ceramic separator. A device capable of filtration and cleaning of the filtration membrane. The method of claim 1,
The four filtration tanks are arranged in a square shape, and adjacent filtration tanks at the top or bottom are connected in series with each other by a series connection pipe, a device capable of filtering livestock wastewater and cleaning the filtration membrane.

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