KR101300951B1 - Membrance coupled anaerobic digester system by using alternate and cross flow type and method for reating organic waste for thereof - Google Patents

Abstract

PURPOSE: An anaerobic digestion system of membrane combined type with application of the alternation/intersection filtration method is configured to collect biogas like methane generated during the process of dehydrating liquid of organic waste to make use of the gas as various energy sources. CONSTITUTION: An anaerobic digestion system of membrane combined type with application of the alternation/intersection filtration method contains a storage hopper (100) collecting and stocking organic sludge or food waste, a dehydrator (200) separating organic sludge or food waste injected in the storage hopper into solid material and dehydrating liquid, a solid material processor (300) processing solid material separated from the dehydrator, a flow control bath (400) storing the dehydrating liquid separated from the dehydrator, an acid fermentor (500) acid-fermenting the dehydrating liquid put into the flow control bath, a methane fermentor (600) disassembling the dehydrating liquid fermented in the acid fermenter to generate methane has, a stabilization bath (700) temporarily saving the methane fermentation liquid from the methane fermentor and an alternation/intersection filtering separation film (800) coagulative-separating the methane fermentation liquid stored in the stabilization bath into enriched water reduced to the stabilization bath and permeated water drained to a water treatment installation. [Reference numerals] (AA) Water treatment facility

Description

Membrane Coupled Anaerobic Digester System by Using Alternate and Cross Flow type and Method for reating Organic Waste for Thereof}

The present invention relates to a membrane-bound anaerobic digestion system using an alternating cross filtration method and an organic waste treatment method using the same. More specifically, the biogas generated in the process of treating organic waste can be used as an energy source. The present invention relates to a membrane-bound anaerobic digestion system using an alternating cross filtration method in which concentrated water repeatedly filtered by an indirect circulation membrane separation method using a stabilization tank is supplied to an acid fermentation tank and a methane fermentation tank, and an organic waste treatment method using the same.

With industrial development, household wastes such as organic sludge or food waste are rapidly increasing due to income increase, change in consumption tendency and development of distribution structure. Such treatment methods include the methods of securing landfills and landfills, incineration methods for incineration, and reprocessing to utilize new resources.

Recently, a recycling method for decomposing organic waste in an anaerobic digestion process to produce methane gas, removing other toxic gases and sludge, and purifying and discharging the methane fermentation liquid has been proposed.

In general, anaerobic digestion refers to the treatment of organic waste using anaerobic (digestive) microorganisms. Anaerobic digestion, also known as "methane fermentation", aims to recover energy by producing digestive gas (biogas) such as methane while simultaneously decomposing and stabilizing organic wastes.

The anaerobic digestion process usually consists of a pretreatment process, an acid fermentation process, a methane fermentation process, a gas collection and purification process, and the like. In this anaerobic digestion process, research and technology development have mainly focused on shortening the treatment period and improving energy recovery rate by increasing the decomposition efficiency of organic waste.

The conventional organic waste is organic waste is fermented in an acid fermentation tank and a methane fermentation tank, methane fermentation liquid discharged from the methane fermentation tank is filtered in a solid-liquid separation membrane through a buffer tank, and then concentrated water discharged by filtering in a solid-liquid separation membrane tank methane fermentation tank and It was directly returned to the acid fermentation tank to maintain the high concentration of microorganisms in the methane fermentation tank and acid fermentation tank, and to increase the treatment efficiency by increasing the contact time between the biodegradable solids and microorganisms slow decomposition.

However, when the methane fermentation tank is observed after operation for a certain period of time, the state of the methane fermentation liquid is gradually deteriorated. For this reason, there is a problem in that the fermentation and decomposition efficiency of organic waste is sharply lowered, and the amount of biogas extracted from the organic waste is also lowered.

KR0841089 10

Therefore, the present invention has been created to solve the above problems, it is possible to use the biogas generated in the process of treating organic waste as an energy source, it was repeatedly filtered by an indirect circulation membrane separation method using a stabilization tank. The purpose of the present invention is to provide a membrane-bound anaerobic digestion system using an alternating cross filtration system for supplying concentrated water to an acid fermentation tank and a methane fermentation tank, and an organic waste treatment method using the same.

An object of the present invention as described above is a storage hopper for collecting and storing organic sludge or food waste; A dehydrator separating organic sludge or food waste introduced into the storage hopper into solids and dehydration liquid; A solids processor for treating the solids separated in the dehydrator; A flow rate adjustment tank for storing the dehydration liquid separated from the dehydrator; An acid fermentation tank for acid-fermenting the dehydration liquid introduced from the flow rate adjustment tank; A methane fermentation tank which decomposes the acid fermented dehydration liquid in a acid fermentation tank and generates methane gas; Stabilization tank for temporarily storing the methane fermentation liquid flowing from the methane fermentation tank; And alternating cross-filtration membrane for solid-liquid separation of the methane fermentation solution stored in the stabilization tank into the concentrated water reduced into the stabilization tank and the permeate drained to the water treatment facility. By the digestive system.

At this time, the dehydrator also performs the crushing of the solids.

In addition, a gas storage tank for storing the biogas generated in the methane fermentation tank and the residual biogas generated in the stabilization tank is further provided.

In addition, the inside of the acid fermentation tank and the methane fermentation tank is further provided with a heating means for heating the dehydrating liquid and acid-fermented dehydrating liquid respectively.

In addition, the acid fermentation tank includes a mechanical stirrer and a vertical stirrer using a pump to agitate the dehydration liquid.

The methane fermentation tank also includes a mechanical horizontal stirrer for stirring the acid-fermented dehydration liquid.

In addition, the stabilization tank includes a water level control sensor for controlling the water level of the methane fermentation liquid introduced from the methane fermentation tank.

In addition, the level control sensor, the upper level control sensor for measuring the level of the methane fermentation liquid flowing into the stabilization tank; And a lower level control sensor for measuring the level of the methane fermentation liquid discharged from the stabilization tank to the alternating cross-filtration membrane; and when the level of the methane fermentation liquid is measured in the upper level control sensor, the inflow of the methane fermentation liquid flowing from the methane fermentation tank is blocked. When the level of the methane fermentation solution is measured by the lower level control sensor, the inflow of the methane fermentation solution is induced in the methane fermentation tank.

In addition, the stabilization tank includes a stirrer for stirring the methane fermentation liquid.

Further, cleaning means for backwashing the alternating filtration separator is further provided.

In another category, an object of the invention is a first step of collecting and storing organic sludge or food waste in a storage hopper; A second step of separating the organic sludge or food waste introduced into the storage hopper in the dehydrator into solids and dehydration liquid; A third step of treating the solids separated from the dehydrator in a solids treatment machine, and the dehydrating liquid is stored in a flow adjusting tank; A fourth step of acid fermenting the dehydrating liquid from the flow rate adjustment tank to the acid fermentation tank; A fifth step of transferring the acid-fermented dehydration liquid from the acid fermentation tank to the methane fermentation tank to decompose the organic components by the biological method and generate methane gas; A sixth step of transferring the fermented methane fermentation liquid from the methane fermentation tank to the stabilization tank; A seventh step of filtering the methane fermentation solution by transferring the methane fermentation solution from the stabilization tank to an alternate cross filtration membrane; The membrane-type anaerobic digestion system utilizing the alternating cross filtration method, comprising: an eighth step of releasing the permeated water filtered out from the alternating cross-filtration membrane and condensing the concentrated water again by transferring it to a stabilization tank. It can be achieved by the organic waste treatment method used.

At this time, the second step is a crushing operation of the solid contained in the organic sludge or food waste.

In addition, a plurality of seventh and eighth steps are repeated in order to increase the concentration of the methane fermentation broth and the concentrated water.

In addition, by repeating steps 7 and 8, the concentrated concentrated water is transferred to an acid fermentation tank for pH adjustment of the acid fermentation tank, and a ninth step of transferring the concentrated water to the methane fermentation tank to increase the concentration of microorganisms in the methane fermentation tank. do.

The method may further include a tenth step of storing the biogas generated in the methane fermentation tank and the residual biogas generated in the stabilization tank in the gas storage tank.

In addition, the biogas stored in the gas storage tank is used as an energy source of the heating means for heating the acid fermentation tank and the methane fermentation tank.

According to the present invention, there is an effect that can be used as various energy sources by collecting biogas such as methane gas generated in the process of treating the dehydration liquid of the organic waste.

Further, the COD _cr concentration of 100,000 mg / L in injected organic waste is the COD _cr concentration in the process of generating a bio-gas such as methane gas, 4,000 mg / L to decrease to 6,000 mg / L to smoothly in the subsequent process water treatment facilities There is an effect that can be processed.

In addition, the concentrated water obtained by repeated filtration through the alternating filtration membrane is converted to an indirect circulation method using a stabilization tank configured to be supplied to the acid fermentation tank and the methane fermentation tank, thereby preventing excessive mixing in the acid fermentation tank and the methane fermentation tank. It is effective to stabilize the activity of the anaerobic microorganisms in the fermenter. In addition, the high concentration of concentrated water is introduced into the acid fermentation tank and methane fermentation tank to maintain the concentration of the organic carbon source that is fed to the fermentation microorganisms and microorganisms, thereby increasing the decomposition of organic matter and biogas generation is also improved.

In addition, the concentrated water discharged from the alternating cross-filtration membrane is introduced into the stabilization tank while the inflow of the methane fermentation solution from the methane fermentation tank is blocked, thereby reducing the amount of excessive circulation of the concentrated water in the stabilization tank to the methane fermentation tank to improve the stirring ability of the fermentation tank. It is effective. In addition, the separation efficiency of the alternating cross filtration membrane for the concentrated water that passed through the stabilization tank is also improved, which is more effective than the conventional high concentration concentrated water discharged.

In addition, the concentration decrease of the methane fermentation liquid according to the daily circulation amount treated in the methane fermentation tank is suppressed by the high concentration of concentrated water as much as possible, thereby improving the ecological environment of the microorganisms, biogas generation is also improved.

The following drawings, which are attached in this specification, illustrate preferred embodiments of the present invention, and together with the detailed description thereof, serve to further understand the technical spirit of the present invention. It should not be interpreted.
1 is a block diagram of a membrane-bound anaerobic digestion system using an alternating cross filtration method according to the present invention;
2 is a schematic cross-sectional view of an alternate cross filtration separation method according to the present invention;
Figure 3 is a flow chart sequentially showing the organic waste treatment method using a membrane-bound anaerobic digestion system using the alternating cross filtration method according to the present invention.

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

<Using the Alternating Cross Filtering Method Membrane Bonding  Construction of Anaerobic Digestion System>

1 is a block diagram of a membrane-bound anaerobic digestion system using an alternating cross filtration method according to the present invention. As shown in Figure 1, the membrane-bound anaerobic digestion system 10 using the alternating filtration method according to the present invention is approximately storage hopper 100, dehydrator 200, solids processor 300, flow control tank ( 400), an acid fermentation tank 500, a methane fermentation tank 600, a stabilization tank 700 and an alternating cross filtration membrane (800).

The storage hopper 100 is a device for temporarily storing organic waste until a certain amount of organic waste is stored before treating organic waste such as organic sludge or food waste.

The dehydrator 200 is a device for dewatering the organic waste introduced from the storage hopper 100 to separate the dehydration liquid and the solids remaining in the organic waste. At this time, the dehydrator 200 may use a device that can also perform the crushing of the solids.

The flow rate adjustment tank 400 is an apparatus for storing the dehydration liquid separated from the dehydrator 200. This flow rate adjustment tank 400 is a device for storing a dehydration liquid in an amount capable of subsequent processing. This flow adjustment tank 400 uses a storage tank that is generally used.

The acid fermentation tank 500 is a device for acid-fermenting the fine solids in the dehydration liquid supplied from the flow rate adjustment tank 400 from polymer to low molecular weight. At this time, one side inside the acid fermentation tank 500 is provided with a heating means 520 for increasing the temperature inside the acid fermentation tank 500 to facilitate the acid fermentation of the dehydration liquid. In this case, the heating means 520 may use the biogas stored in the gas storage tank 900 to be described later as fuel. In addition, the inside of the acid fermentation tank 500 is provided with a stirrer 510 for stirring the dehydration liquid. At this time, the stirrer 510 includes a mechanical stirrer and a vertical stirrer using a pump to agitate the dehydration liquid.

The methane fermentation tank 600 is a device that decomposes an organic component of an acid fermented dehydration solution introduced from an acid fermentation tank 500 by using a microorganism in an anaerobic state and generates a biogas such as methane gas. The biogas thus generated is stored in the gas storage tank 900 to be described later. At this time, the inner side of the methane fermentation tank 600 is provided with a heating means 620 for increasing the internal temperature of the methane fermentation tank 600. In this case, the heating means 620 may use the biogas stored in the gas storage tank 900 as a fuel, similar to the heating means 520 provided in the acid fermentation tank 500. In addition, the inside of the methane fermentation tank 600 is provided with a stirrer 610 for stirring the acid-fermented dehydration liquid. At this time, the inside of the methane fermentation tank 600 is provided with a mechanical horizontal stirrer, methane fermentation tank while circulating the concentrated water injected through the lower distributor of the methane fermentation tank 600 in the stabilization tank 700 to be described later instead of a vertical stirrer using a pump Internal vertical agitation of 600 is applied.

Stabilization tank 700 is a device for temporarily storing the methane fermentation liquid discharged from the methane fermentation tank 600. This flow adjustment tank 400 uses a storage tank that is generally used. Inside the stabilization tank 700 includes a water level control sensor 720 for controlling the level of the methane fermentation liquid flowing from the methane fermentation tank 600. Stabilization tank 700 is a methane fermentation solution flowing from the methane fermentation tank 600 and the concentrated water passed through the alternating cross-filtration membrane 800 to be described later circulating to control the concentration of the methane fermentation should always be introduced Because. The water level control sensor 720 is an upper level control sensor 721 for measuring the high water level of the methane fermentation liquid stored in the stabilization tank 700 and a lower level control sensor for measuring the low water level of the methane fermentation liquid stored in the stabilization tank 700 ( 722). That is, when the level of the methane fermentation liquid is measured by the upper level control sensor 721, the inflow of the methane fermentation liquid flowing from the methane fermentation tank 600 is blocked, and when the level of the methane fermentation liquid is measured by the lower level control sensor 722, In the fermenter 600 to induce the introduction of the methane fermentation broth. In addition, in the stabilization tank 700, the methane fermentation solution stored in the inside and the concentrated circulated in the alternating filtration membrane 800 so as not to sink in the lower portion of the stabilization tank 700, and the alternating cross filtration membrane to a uniform concentration inside Agitator 710 is provided to stir to be supplied to 800. In addition, the residual biogas is generated in the stabilization tank 700, which is stored in the gas storage tank 900 to be described later, similar to the biogas generated in the methane fermentation tank 600. At this time, the residual biogas generated in the stabilization tank 700 is transferred to the gas holder associated with the stabilization tank 700, the residual biogas generated in the stabilization tank 700 is more than a predetermined pressure on one side of the residual biogas transfer pipe. When used, it is provided with a venting valve that opens. Here, the methane fermentation liquid means that the digestion to some extent with a mixture of acid-fermented dehydration liquid and digested microorganisms.

2 is a schematic cross-sectional view of an alternate cross filtration separation method according to the present invention. The alternate cross filtration membrane 800 is a device for solid-liquid separation of the methane fermentation solution flowing from the stabilization tank 700 by the pressure pump into concentrated water and permeate water. The alternating filtration separator 800 includes a separation membrane for separating the methane fermentation broth. The separator used here uses an external separator such as a tubular ultrafiltration membrane (UF) or a microfiltration membrane (MF). One side of the alternating cross filtration membrane 800 is connected to the methane fermentation solution injection pipe connected to the stabilization tank 700 is injected with the methane fermentation solution pressurized to a predetermined pressure by a pressure pump. The permeated water passing through the fine pores of the separator is discharged to the water treatment facility through the permeate discharge pipe installed on one side of the separator, and the concentrated water (mainly digested microorganisms) that did not pass through the separator is returned to the other side of the injection tube. It is conveyed to the stabilization tank 700 through. At this time, the method of passing the concentrated water through the separation membrane alternately is returned to the stabilization tank (700).

One side of the alternate cross-filtration membrane 800 or the methane fermentation liquor conveying pipe is connected to the cleaning means (not shown) to remove contaminants 850 accumulated on the inner circumferential surface of the alternate cross-filtration membrane 800. At this time, the cleaning solution of the cleaning means removes the contaminants 850 accumulated in the alternate cross filtration membrane 800 by inserting the washing water in a direction opposite to the injection direction of the methane fermentation solution injected into the alternate cross filtration membrane 800. . By using the cleaning means, the inner circumferential surface of the alternate cross filtration membrane 800 may be washed to remove the contaminants 850, thereby preventing the alternate cross filtration membrane 800 from being blocked by the contaminants 850.

The gas storage tank 900 is a device for storing the biogas generated in the methane fermentation tank 600 and the residual biogas generated in the stabilization tank 700. The gas storage tank 900 uses a gas storage tank or the like that is commonly used. The biogas stored in the gas storage tank 900 is transmitted to the heating means 520 and 620 provided in the acid fermentation tank 500 and the methane fermentation tank 600 to heat water to steam the acid fermentation tank 500 and the methane fermentation tank. The steam supplied to the 600 is used as a raw material for generation, or sent to an external power system and used as an energy source.

<Using the Alternating Cross Filtering Method Membrane Bonding  Organicity Using Anaerobic Digestion System Waste Treatment Method>

Figure 3 is a flow chart sequentially showing the organic waste treatment method using a membrane-bound anaerobic digestion system using the alternating cross filtration method according to the present invention. First, as shown in FIG. 3, organic waste such as organic sludge or food waste is collected in the storage hopper 100 to temporarily store the organic waste until a predetermined amount of organic waste is stored (S100). That is, the collected organic waste is stored until the organic waste is collected to the extent that subsequent work is possible.

Next, the organic waste stored in the storage hopper 100 is transferred to the dehydrator 200, and in the dehydrator 200, the organic waste is dehydrated and separated into solids and dehydration solution (S200). At this time, the dehydrator 200 is also performed to crush the solids to facilitate the processing of solids.

Next, the solid matter separated from the dehydrator 200 is transferred to the solids processor 300 and processed, and the dehydration liquid is stored in the flow rate adjusting tank 400 (S300).

Next, the dehydration liquid stored in the flow rate adjustment tank 400 is injected into the acid fermentation tank 500 to acid fermentation (S400). At this time, the dehydration solution is acid-fermented at a temperature of 35 to 55 ℃ 1 to 3 days, preferably 2 days in the acid fermentation tank 500. The temperature control of the acid fermentation tank 500 increases the internal temperature of the acid fermentation tank 500 by the heating means 520 provided in the acid fermentation tank 500, and the heating means 520 is stored in the gas storage tank 900. Biogas is used as a raw material. In addition, the acid fermentation tank 500 is acid fermented while stirring the dehydrating liquid stored in the acid fermentation liquid using a vertical stirrer using a mechanical horizontal stirrer and a pump.

Next, the acid-fermented dehydration liquid in the acid fermentation tank 500 is transferred to the methane fermentation tank 600 to decompose the organic components of the acid-fermented dehydration liquid by a biological method and generate methane gas (S500). Anaerobic microorganisms in the methane fermentation tank 600 make the organic material of the acid-fermented dehydration liquid introduced into organic acid, and decompose the organic acid into methane (CH ₄ ), carbon dioxide (CO ₂ ) and water (H ₂ O). This process is preferably carried out at a temperature of 35 ℃ to 55 ℃ by heating the internal temperature by the heating means 620 provided in the methane fermentation tank 600. In addition, inside the methane fermentation tank 600, the acid fermented dehydration solution is stirred using a mechanical horizontal stirrer to methane fermentation. At this time, instead of the vertical stirrer, the concentrated water circulated in the stabilization tank 700 made in the process described below is vertically stirred by using the injected through the lower distributor of the methane fermentation tank 600.

Next, the methane fermentation solution fermented in the methane fermentation tank 600 is transferred to the stabilization tank 700 and stored (S600). At this time, the methane fermentation liquid flowing into the stabilization tank 700 from the methane fermentation tank 600 is introduced until the methane fermentation liquid is detected in the upper level control sensor 721 of the water level control sensor 720, the upper level control sensor 721 When the methane fermentation solution is detected in the methane fermentation tank 600, the supply of the methane fermentation solution is stopped. In addition, the methane fermentation liquid supplied to the stabilization tank 700 using the stirrer 610 provided in the methane fermentation tank 600 and the concentrated water re-transmitted from the alternating cross filtration membrane 800 in the process described below is stabilized ( 700) Stir to have a uniform concentration inside.

Next, the methane fermentation liquid is transferred from the stabilization tank 700 to the alternating cross-filtration membrane 800 to filter the methane fermentation liquid (S700).

Next, the permeated water filtered in the alternating cross filtration membrane 800 is discharged to the water treatment facility to the outside, and the concentrated water not filtered in the alternating cross filtration membrane 800 is transferred back to the stabilization tank 700 to stabilize the tank ( Concentrate by mixing with the methane fermentation solution stored in 700) (S800).

At this time, the step of transferring the methane fermentation solution from the stabilization tank 700 to the alternating cross-filtration membrane (S700) and filtering the same to increase the concentration by re-transmitting the concentrated water to the stabilization tank (700) (S800) Perform a plurality of iterations. By repeating this process, the amount of methane fermentation solution stored in the stabilization tank 700 is reduced due to the discharge of the filtered water, and when the methane fermentation liquid is detected by the lower level control sensor 722 of the stabilization tank 700, the methane fermentation tank is stabilized. The methane fermentation broth is supplied to the tank 700.

Next, the step of transferring the methane fermentation solution from the stabilization tank (700) to the alternating cross-filtration membrane (800) and filtering it to transfer the concentrated water back to the stabilization tank (700) to increase the concentration (S800). The transfer the concentrated water concentrated to a predetermined concentration or more by performing a plurality of repetition to the acid fermentation tank 500 and the methane fermentation tank 600 (S900). This, pH control of the dehydration solution stored in the acid fermentation tank 500 using the concentrated concentrated water, and by increasing the microbial concentration in the methane fermentation tank 600 to decompose the organic components of the acid fermentation dehydration stored in the methane fermentation tank 600 This is to facilitate the.

Next, the biogas generated in the methane fermentation tank 600 and the residual biogas generated in the stabilization tank 700 are stored in the gas storage tank 900 (S1000). Biogas is stored in the gas storage tank 900 is described as a separate process for convenience of description, this process is often treated in the process of treating the dehydration acid and the fermentation in the methane fermentation tank 600 and stabilization tank 700 As a process that occurs, each step may be performed immediately without a separate storage time, and as described, it may be waited for a predetermined amount of biogas to be collected, and the biogas may be stored in the gas storage tank 900 in the last step. have. The biogas stored in the gas storage tank 900 is used as an energy source of the heating means 520 and 620 for heating the inside of the acid fermentation tank 500 and the methane fermentation tank 600. The other biogas is an external power system. It is sent to and used as an energy source.

Finally, the alternate cross filtration membrane 800 is a small amount of contaminant 850 is accumulated therein while performing the operation, the alternate cross filtration membrane 800 using the cleaning means after repeating a predetermined operation alternately. Wash the inside of the oven.

As described above, those skilled in the art will understand that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

10: Membrane-bound anaerobic digestion system using alternating cross filtration
100: storage hopper
200: dehydrator
300: solids processor
400: flow adjustment tank
500: acid fermentation tank
510: Stirrer
520: heating means
600: methane fermentation tank
610: Stirrer
620: heating means
700: stabilization tank
710: Stirrer
720: Water level sensor
721: Upper level control sensor
722: low water level sensor
800: alternate cross filtration membrane
850: pollutants
900: gas storage tank

Claims (16)

A storage hopper 100 for collecting and storing organic sludge or food waste;
A dehydrator 200 for separating the organic sludge or food waste introduced into the storage hopper 100 into solids and dehydration liquid;
A solids processor 300 for treating the solids separated from the dehydrator 200;
A flow rate adjustment tank 400 for storing the dehydration liquid separated from the dehydrator 200;
An acid fermentation tank 500 for acid fermenting a dehydration liquid introduced from the flow rate adjustment tank 400;
A methane fermentation tank 600 for decomposing the acid fermented dehydration liquid in the acid fermentation tank 500 and generating methane gas;
Stabilization tank 700 for temporarily storing the methane fermentation solution flowing from the methane fermentation tank 600; And
Alternating cross filtration membrane (800) for solid-liquid separation of the methane fermentation solution stored in the stabilization tank 700 is injected into the concentrated water and the permeate drained to the water treatment facility is reduced to the stabilization tank (700); Membrane-bound anaerobic digestion system using alternating cross filtration. The method of claim 1,
The dehydrator 200 is a membrane-bound anaerobic digestion system using an alternating cross filtration method, characterized in that also performs the crushing of the solid. The method of claim 1,
Membrane-coupling using alternating filtration, characterized in that the gas storage tank 900 for storing the biogas generated in the methane fermentation tank 600 and the residual biogas generated in the stabilization tank 700 is further provided. Anaerobic Digestion System. The method of claim 1,
The alternating filtration method is characterized in that the inside of the acid fermentation tank 500 and the methane fermentation tank 600 is further provided with heating means (520, 620) for heating the dehydrating liquid and the acid fermented dehydrating liquid respectively. Membrane-bound anaerobic digestion system utilized. The method of claim 1,
The acid fermentation tank 500 is a membrane-bound anaerobic digestion system using a alternating cross filtration method comprising a mechanical stirrer and a vertical stirrer using a pump to agitate the dehydration liquid. The method of claim 1,
The methane fermentation tank 600 is a membrane-bound anaerobic digestion system using a alternating cross filtration method, characterized in that it comprises a mechanical horizontal stirrer for stirring the acid-fermented dehydration liquid. The method of claim 1,
The stabilization tank 700 is a membrane-bound anaerobic digestion using the alternating cross filtration method, characterized in that it comprises a water level control sensor 720 for controlling the water level of the methane fermentation liquid introduced from the methane fermentation tank 600. system. 8. The method of claim 7,
The water level control sensor 720,
An upper level control sensor 721 for measuring the level of the methane fermentation solution flowing into the stabilization tank 700; And
And a lower level control sensor 722 for measuring the level of the methane fermentation liquid discharged from the stabilization tank 700 to the alternating cross filtration membrane 800.
When the level of the methane fermentation liquid is measured by the upper level control sensor 721, the inflow of the methane fermentation liquid flowing from the methane fermentation tank 600 is blocked, and the level of the methane fermentation liquid is lowered by the lower level control sensor 722. Membrane-bound anaerobic digestion system using the alternating filtration method, characterized in that inducing the inflow of the methane fermentation solution in the methane fermentation tank (600). The method of claim 1,
Membrane-bound anaerobic digestion system utilizing the alternating filtration method, characterized in that the stabilization tank (700) comprises an agitator (710) for stirring the methane fermentation solution. The method of claim 1,
Membrane-coupled anaerobic digestion system using the alternating cross filtration method, characterized in that the cleaning means for backwashing the alternating cross filtration membrane (800). A first step (S100) of collecting and storing organic sludge or food waste in the storage hopper 100;
A second step (S200) of separating the organic sludge or food waste introduced into the storage hopper 100 from the dehydrator 200 into solids and dehydration liquid;
A third step (S300) of treating the solid matter separated from the dehydrator (200) in a solids processor (300), and storing the dehydration liquid in a flow adjusting tank (400);
A fourth step (S400) of acid-fermenting the dehydrating liquid by inputting the dehydration solution from the flow rate adjustment tank 400 to an acid fermentation tank 500;
A fifth step (S500) of transferring the acid-fermented dehydration liquid from the acid fermentation tank (500) to the methane fermentation tank (600) to decompose the organic component by the biological method and generate methane gas;
A sixth step (S600) of transferring the methane fermentation solution fermented in the methane fermentation tank 600 to the stabilization tank 700;
A seventh step (S700) of transferring the methane fermentation solution from the stabilization tank 700 to an alternate cross filtration membrane 800 to filter the methane fermentation solution;
And an eighth step (S800) of releasing the permeated water filtered by the alternating filter separation membrane 800 to the outside, and condensed water by transferring the concentrated water back to the stabilization tank 700 (S800). Organic waste treatment method using membrane-bound anaerobic digestion system using filtration method. 12. The method of claim 11,
The second step (S200) is an organic waste treatment method using a membrane-bound anaerobic digestion system using the alternating cross filtration method, characterized in that the crushing of the solid contained in the organic sludge or food waste. 12. The method of claim 11,
Organicity using a membrane-bound anaerobic digestion system using alternating alternating filtration, characterized in that the seventh step (S700) and the eighth step (S800) are repeated a plurality of times to increase the concentration of the methane fermentation solution and the concentrated water. Waste treatment method. The method of claim 13,
Repeating the seventh step (S700) and the eighth step (S800) to transfer the concentrated concentrated water to the acid fermentation tank 500 to adjust the pH of the acid fermentation tank 500, the methane fermentation tank 600 Organic waste treatment method using a membrane-bound anaerobic digestion system using the alternating cross filtration method further comprises a ninth step (S900) for transferring to the methane fermentation tank (600) to increase the microbial concentration. 12. The method of claim 11,
Alternate cross filtration further comprising a tenth step (S1000) of storing the biogas generated in the methane fermentation tank 600 and the residual biogas generated in the stabilization tank 700 in the gas storage tank 900. Organic waste treatment method using membrane-bound anaerobic digestion system using the method. 16. The method of claim 15,
The biogas stored in the gas storage tank 900 utilizes an alternate cross filtration method, which is used as an energy source of heating means 520 and 620 for heating the acid fermentation tank 500 and the methane fermentation tank 600. Organic waste treatment method using membrane-bound anaerobic digestion system.

Images