KR101386954B1 - Purifying apparatus for wastewater having organic waste - Google Patents

Abstract

A purification apparatus of anaerobic digestion and digestion waste fluid of organic waste water according to the present invention, in a purification apparatus of anaerobic digestion and digestion waste fluid of organic waste water comprised of purification-processing organic waste water, comprises: a water collection tank; a fakean adulteration treatment device; an anaerobic digestion tank; a deaeration tank; a first solid-liquid separator; a flow adjustment tank; a anaerobic tank; an anaerologic tank; an organism settling tank; a second solid-liquid separator; an activated carbon tank; and a settling tank. Moreover, a desulfurization mean provided in the anaerobic digestion tank drops hydrogen sulfide as a crystal using air and separation-discharges, and a nitrogen removing mean provided on the deaeration tank removes nitrogen in treated waste water. Accordingly, the present invention can remove sulfur and nitrogen in the organic waste water thereby easily purification-treating organic waste water. [Reference numerals] (11) Second solid-liquid separator; (2) Impurities removing device; (5) First solid-liquid separator; (AA) Filtration discharge

Description

PURIFYING APPARATUS FOR WASTEWATER HAVING ORGANIC WASTE}

The present invention relates to an anaerobic digestion and digestion of organic wastewater for purifying organic wastewater, and more particularly, to purify organic wastewater by removing sulfur and nitrogen in organic wastewater. It relates to the anaerobic digestion of organic wastewater and the purification treatment of digestive waste fluid.

Organic wastewater such as food waste, animal waste, sewage sludge, and leachate may generate methane, hydrogen sulfide, ammonia, nitrogen, etc. and thus need to be efficiently treated to recycle resources.

Thus, a conventional technology applied for and registered in Korean Patent Application No. 10-2008-0099135 has been developed, which includes an acid generating reactor, a methane fermentation tank, a precipitation tank, and a sludge storage tank to treat high concentration wastewater containing organic waste. In the wastewater treatment method, the acid production reactor maintains the internal temperature in the range of 55-65 ° C and has a pH of 5.0 using mesophilic bacteria or thermophilic bacteria. In the range of ˜6.0 and performing an acid production reaction under conditions in which the redox potential (ORP) is maintained at −200 to −300 mV; The methane fermentation tank provided in the range of 2-5 has microbial fixation carrier, methane fermentation reaction, hydrogen ion concentration (pH) is 7.2 ~ 8.2, and redox potential (ORP) is maintained at -300 ~ -350mV. Methane fermentation is carried out at; .

However, the prior art as described above lacks a technology for smoothly treating hydrogen sulfide contained in biogas generated in an anaerobic digestion tank, and a technology for removing nitrogen in wastewater by quickly removing ammonia generated in a degassing tank. In addition, since the facilities for processing biogas produced in the anaerobic digester have to be equipped, there is a disadvantage in that a lot of facilities for recycling resources are required.

The present invention has been made to solve the problems of the prior art as described above, the object of the present invention is to provide a desulfurization means in the upper portion of the anaerobic digestion tank and nitrogen removal means in the upper portion of the degassing tank, The present invention provides an apparatus for treating anaerobic digestion and digestion waste of organic wastewater which can remove sulfur and nitrogen and thus can easily purify organic wastewater.

In order to achieve the above object, the present invention is an anaerobic digestion of organic wastewater consisting of purifying organic wastewater and a purification treatment apparatus of digestive waste liquid, the collection tank to which the treated water which is organic wastewater is carried; A contaminant treatment device for solid-liquid separating the treated water in the sump to discharge the treated water from which the contaminants have been removed; An anaerobic digestion tank for producing and discharging biosulfide from which hydrogen sulfide is removed by desulfurization means when treating the treated water discharged from the contaminant treatment unit with microorganisms; A degassing tank for removing nitrogen in the treated water by removing ammonia in the treated water treated in the anaerobic digestion tank with aeration and nitrogen removal means; A first solid-liquid separator which firstly separates the treated water treated in the degassing tank to discharge the treated water separated from the solids; A flow rate adjusting tank for increasing biodegradability by maintaining equalization and microbial activation of the treated water discharged from the first solid-liquid separator; An anaerobic tank for degassing the treated water using the oxidized nitrogen returned from the aerobic tank and the organic material supplied from the flow rate adjusting tank; An aerobic tank for nitrifying the treated water treated with the anaerobic tank; A bioprecipitation tank for physically precipitating microorganisms in the treated water treated with the aerobic tank; A biological treatment tank for aeration treatment to temporarily store and homogenize the treated water treated in the bioprecipitation tank with a second solid-liquid separator; A second solid-liquid separator in which the undigested organic matter is aggregated in the treated water treated in the bioprecipitation tank and introduced into the first solid-liquid separator and the discharged treated water from which the coagulated sludge is removed is discharged; Activated carbon tank for treating the treated water discharged from the second solid-liquid separator with activated carbon and aeration; And it consists of a sedimentation tank discharged after sludge sedimentation of the treated water in the activated carbon tank.

Furthermore, the desulfurization means provided in the anaerobic digestion tank is to separate and discharge hydrogen sulfide into crystals by using air, and the nitrogen removal means provided in the degassing tank is discharged to the outside of the degassing tank by a forced blowing method. It is to remove nitrogen inside.

The anaerobic digestion and digestion waste treatment apparatus of the organic wastewater according to the present invention as described above is a desulfurization means provided at the top of the anaerobic digestion tank to remove hydrogen sulfide generated from the treated water in the anaerobic digestion tank and to be provided at the top of the degassing tank. Since the ammonia is quickly discharged to the outside by the used nitrogen removal means, sulfur and nitrogen in the organic wastewater can be removed, so that the organic wastewater can be easily purified.

1 is a block diagram showing an anaerobic digestion of organic wastewater and a purification treatment of digestive waste liquid according to the present invention.
Figure 2 is a cross-sectional view showing an example of an anaerobic digestion tank and desulfurization means applied to the anaerobic digestion of organic wastewater and the purification of digestive waste liquid according to the present invention.
3 is a cross-sectional view showing another example of an anaerobic digestion tank and a desulfurization means applied to the anaerobic digestion of organic wastewater and a purification treatment of digestive waste liquid according to the present invention.
Figure 3 is a cross-sectional view showing a degassing tank and nitrogen removal means applied to the anaerobic digestion of organic wastewater according to the present invention and the purification treatment of digestive waste liquid.
FIG. 5 is a partial excerpt illustrating a wall or a bottom of a degassing tank applied to an anaerobic digestion of an organic wastewater according to the present invention and a purification treatment device for digestive waste.

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

1 is a view showing an apparatus for treating anaerobic digestion and digestion waste of organic wastewater according to the present invention, wherein the apparatus for purifying organic wastewater, such as food waste, animal waste, sewage sludge, leachate, and the like.

And the anaerobic digestion and digestion of the organic wastewater according to the present invention is a collecting tank → contaminant treatment plant → anaerobic digestion tank → degassing tank → first solid-liquid separator → flow control tank → anaerobic tank → aerobic tank → bioprecipitation tank → biological treatment tank → second Through the solid-liquid separator → activated carbon tank → sedimentation tank, treated water, which is an organic wastewater, is treated and filtered.

Where collection tank (1), contaminant treatment unit (2), anaerobic digestion tank (3), degassing tank (4), first solid-liquid separator (5), flow control tank (6), anaerobic tank (7), aerobic tank (8), bioprecipitation tank (9) Since the general operations of the biological treatment water tank 10, the second solid-liquid separator 11, the activated carbon tank 12, and the precipitation tank 13 have many known techniques, the description of the general operation is omitted.

In any case, the sump (1) is to be introduced into the treated water is an organic wastewater, the contaminant treatment unit (2) is a solid-liquid separator, such as screen, high-speed decanter, etc., vinyl, gravel, grain shell, straw, etc. The same contaminants are separated from the treated water and the treated water is discharged.

The anaerobic digestion tank (3) has a desulfurization means when the treated water discharged from the contaminant (2) with a microorganism to produce and discharge the biogas removed from the hydrogen sulfide.

Here, the desulfurization means provided in the anaerobic digestion tank 3 may include hydrogen sulfide (H ₂ S) in biogas generated from the treated water in the anaerobic digestion tank 3 and oxygen (O ₂ ) in the air. It combines to form crystals of sulfur (S ₂ ) particles, and hydrogen sulfide (H ₂ S) and ammonia (NH ₃ ) in biogas generated from the treated water in the anaerobic digestion tank (3) and oxygen (O ₂ ) in the air. By binding to form crystals of ammonium sulfate ((NH ₃ ) ₂ SO ₃ ) particles.

That is, the desulfurization means covers the upper opening of the anaerobic digestion tank 3 with the digester cover 31, and covers the upper portion of the digester cover 31 with the gas bubble 32, and the digester cover 31 and the gas bubble ( The air inlet 33 for injecting air into the space between the 32 is installed, the blower 33 for power transfer of the outside air to the air inlet 33 is installed on the outside of the anaerobic digestion tank (3) Is made of.

Here, the digester cover 31 is provided with an outlet 31a for outflowing the biogas generated in the anaerobic digester 3 to the upper side of the anaerobic digester 1, as well as the digester cover 31 and the gas bubble 32. The outlet 31b for discharging the desulfurized biogas to the outside is provided.

In addition, the gas bubble 32 may be made of plastic paper or waterproof fabric paper and be stretched. The gas bubble 32 may contain biogas at an upper portion of the digester cover 31 so as to trap a large amount of air at the upper portion of the digester cover 31. To be captured.

The air inlet 33 is injected into the space between the digester cover 31 and the gas bubble 32 to the outside air transferred from the blower (33).

In particular, in the present invention, in order to smoothly transfer and mix the biogas generated in the treated water in the anaerobic digestion tank 1 into the space between the digester cover 31 and the gas bubble 32, the tip portion of the air inlet 33 Air is injected upward from the outlet 31a of the digester cover 31 so that the biogas in the anaerobic digester 3 flows to the space between the digester cover 31 and the gas bubble 32 together with the air.

The blower 33 is connected to the air inlet 33 of the outlet side of the blower 33 in order to power transfer the outside air to the air inlet 33, the outer side of the anaerobic digestion tank (3) Is installed.

Then, the outside air supplied by the blower 33 and the biogas generated in the digester react with each other in the space between the digester cover 31 and the gas bubble 32. Hydrogen sulfide (H ₂ S) and ammonia (NH ₃ ) are combined with oxygen in the air to be converted into sulfur (S ₂ ) or ammonium sulfate ((NH ₃ ) ₂ SO ₃ ) as powdery crystals.

The crystals sulfur (S ₂ ) or ammonium sulfate ((NH ₃ ) ₂ SO ₃ ) is accumulated on the upper surface of the digester cover 31, after a certain time to collect the gas bubbles 32 to collect the crystals It can be.

In addition, in order to easily collect the crystals stacked on the upper part of the digester cover 31, in the present invention, as shown in Figure 3 crystals incorporating crystals that fall by reacting the air and biogas in the upper portion of the digester cover 31 The collection drawer 35 includes a structure that opens and closes to one side of the digester cover 31.

Of course, in order to be able to discharge a large amount of biogas from the treated water in the anaerobic digestion tank (3), it is obvious that the stirrer (1b) for flowing the treated water is installed.

In the desulfurization means for anaerobic digestion tank according to the present invention, when the blower 33 is operated, external air is injected into the space between the digester cover 31 and the gas bubble 32 through the air inlet 33 and anaerobic. Biogas generated from the treated water in the digester 3 flows through the outlet 31a of the digester cover 31 into the space between the digester cover 31 and the gas bubble 32 through the outlet.

Then, in the space between the digester cover 31 and the gas bubble 32, oxygen (O ₂ ) in the air combines with hydrogen sulfide (H ₂ S) and ammonia (NH ₃ ) in the biogas to crystallize sulfur (S ₂ ). Or ammonium sulfate ((NH ₃ ) ₂ SO ₃ ) to be dropped.

In other words, when oxygen is insufficient, oxygen and hydrogen sulfide

2H ₂ S + O ₂ → 2S + 2H ₂ O

Reaction is stabilized with sulfur particles as in the above reaction scheme, and thus sulfur particles fall to the upper surface of the digester cover 31 or the drawer 35.

In addition, oxygen sulfide and ammonia

H ₂ S + ₂ O ₂ → H ₂ SO ₃

H ₂ SO ₃ + 2 NH ₃ → (NH ₃ ) ₂ SO ₃

The reaction is stabilized with ammonium sulfate particles as in the above reaction scheme, and thus drops to the upper surface of the digester cover 31 or the drawer 35.

Sulfur (S ₂ ) or ammonium sulfate ((NH ₃ ) ₂ SO ₃ ), which are crystals, is accumulated on the upper surface of the digester cover 31, and after a predetermined time, the gas bubble 32 is collected or the drawer 35 is removed. The crystals can be collected by opening the.

In this process, hydrogen sulfide is removed from the biogas between the digester cover 31 and the gas bubble 32, and thus, the biogas from which the hydrogen sulfide is removed is discharged to the outside through the outlet 31b provided in the digester cover 31. May be discharged.

Then, when the treated water in the anaerobic digestion tank 3 is purified, the alkalinity of the treated water is prevented and the pH is lowered as compared with the conventional method.

Furthermore, when desulfurization using air as described above, the concentration of methane, which is biogas, is lowered. Therefore, if the treated water of the anaerobic digestion tank 3 is abandoned using the biogas discharged to the outlet 31b, the air is treated water. It can be dissolved in and converted into methane, a higher concentration of biogas.

In particular, in the desulfurization means provided in the anaerobic digestion tank 3, since sulfur and ammonium sulfate, which are crystals generated by the reaction of hydrogen sulfide and ammonia in the biogas with oxygen in the air, are dropped in the upper portion or the drawer of the lid, Hydrogen sulfide and ammonium sulfate, which are crystals generated by the contact of air with hydrogen sulfide and ammonia in the digester, do not fall on the surface of the digestion solution, making it easy to remove hydrogen sulfide from wastewater in the anaerobic digester. Ammonium sulfate can be used to produce fertilizer, etc., thereby improving the utilization of resources.

Meanwhile, the degassing tank 4 removes ammonia in the treated water treated in the anaerobic digestion tank 3 by aeration and nitrogen removing means to remove nitrogen in the treated water.

In particular, the nitrogen removal means provided in the degassing tank 4 discharges the nitrogen in the ammonia ion (NH ₄ ⁺ ) state to the outside in the treated water, the treated water in the degassing tank 4 in the process of treating the treated water. It is to remove nitrogen contained in.

The nitrogen removal means provided in the degassing tank 4 covers the upper opening of the degassing tank 4 with the degassing tank cover 41, and forms an inlet 41a at one side of the degassing tank cover 41. In addition, the outlet 41b is formed at the other side, and the blower 42 is connected to the inlet of the degassing tank cover 41 so that external air powered by the blower 42 is introduced into the degassing tank 41. It is discharged to the outlet of the degassing tank cover 41 together with ammonia.

In addition, to reduce the dissolution of ammonia again in the treated water, the outlet bottom of the degassing tank cover 41 includes access to the surface of the treated water in the degassing tank 4, the wall or bottom of the degassing tank 41 A hot water pipe 43 is installed in the sieve, and includes heating the treated water inside the degassing tank with hot water.

The nitrogen removal means thus formed supplies air to the treated water in the degassing tank 4 by aeration, and the air powered by the blower 42 passes through the upper surface of the treated water and exits the degassing tank cover 41. 41b), the ammonia generated in the treated water in the degassing tank 4 can be discharged to the outlet 41b of the lid 41 before re-dissolving into the treated water.

On the other hand, the first solid-liquid separator 5 is a device such as a high-speed decanter, belt press, filter press, etc., and in the degassing tank 4 using a polymer coagulant without using an inorganic sound collector to lower the pH of the treated water. The treated water is first separated into solids to discharge the treated water from the solids.

The flow rate adjusting tank (6) is to increase the biodegradability by maintaining the equalization and microbial activation by abandoning the treated water discharged from the first solid-liquid separator (5), the anaerobic tank (7) is returned from the aerobic tank (8) The oxidized nitrogen is degassed in the treated water treated in the flow regulating tank 6 using the organic material supplied from the flow regulating tank, and the aerobic tank 8 nitrifies the treated water treated in the anaerobic tank 7, The bioprecipitation tank 9 physically precipitates microorganisms in the treated water treated with the aerobic tank 8, and the biotreatment tank 10 is temporarily stored and homogenized for treatment by the second solid-liquid separator 11. In order to give up the treated water treated in the bioprecipitation tank (9).

The second solid-liquid separator 11 agglomerates undigested organic matter in the treated water treated in the bioprecipitation tank 9, and introduces the coagulated sludge into the first solid-liquid separator and discharges the treated water from which the coagulated sludge is removed. Done.

When the pressurization unit is used as the second solid-liquid separator 11, the scum pulled out of the pressurization unit is mixed with the treated water of the degassing tank 4 introduced into the first solid-liquid separator 5 to separate the first solid-liquid separator ( 5) can be separated into a solid solution, it is preferable to store and treat the scum in the scum storage tank (11a) before sending the scum to the first solid-liquid separator (5) when using an inorganic coagulant to lower the pH in the pressurization.

The activated carbon tank 12 treats the treated water discharged from the second solid-liquid separator 11 with activated carbon and aeration, and the settling tank 13 sludges the treated water treated in the activated carbon tank 12 after sludge precipitation. Discharged.

The anaerobic digestion and digestion waste treatment apparatus of organic wastewater according to the present invention thus obtained is characterized in that the treated water which is organic wastewater is collected in a collection tank (1) → a contaminant treatment unit (2) → an anaerobic digestion tank (3) → a degassing tank (4) 1 solid-liquid separator (5) → flow adjustment tank (6) → anaerobic tank (7) → aerobic tank (8) → bioprecipitation tank (9) → biological treatment tank (10) → second solid-liquid separator (11) → activated carbon tank (12) → It is processed through the settling tank 13 and filtered.

In particular, in the present invention, by using the desulfurization means provided in the anaerobic digestion tank (3), hydrogen sulfide and ammonia generated in the treated water in the anaerobic digestion tank (3) can be smoothly removed by oxygen in the air, the degassing tank (4) By nitrogen removal means provided in the) it is possible to quickly discharge the ammonia generated in the treated water in the degassing tank 4 to reduce the nitrogen in the treated water smoothly.

1: water tank 2: dust collector
3: anaerobic digester 31: digester cover
31a: outlet 31b: outlet
32: gas bubble 33: air inlet
34: blower 35: drawer
4: degassing tank 41: degassing tank cover
41a: entrance 41b: exit
42: blower 43: hot water pipe
5,11: 1st, 2nd solid-liquid separator 6: flow adjustment tank
7: anaerobic tank 8: aerobic tank
9: bioprecipitation tank 10: biological treatment tank
12: activated carbon tank 13: precipitation tank

Claims (8)

In the anaerobic digestion of organic wastewater and the purification of digestive waste fluid comprising the purification of organic wastewater,
A collecting tank into which treated water which is organic wastewater is introduced; A contaminant treatment device for solid-liquid separating the treated water in the sump and discharging the treated water from which the contaminants have been removed; An anaerobic digestion tank for producing and discharging biosulfide from which hydrogen sulfide is removed by desulfurization means when treating the treated water discharged from the contaminant treatment unit with microorganisms; A degassing tank for removing nitrogen in the treated water by removing ammonia in the treated water treated in the anaerobic digestion tank with aeration and nitrogen removal means; A first solid-liquid separator which firstly separates the treated water treated in the degassing tank to discharge the treated water separated from the solids; A flow rate adjusting tank for increasing biodegradability by maintaining equalization and microbial activation of the treated water discharged from the first solid-liquid separator; An anaerobic tank for degassing the treated water using the oxidized nitrogen returned from the aerobic tank and the organic material supplied from the flow rate adjusting tank; An aerobic tank for nitrifying the treated water treated with the anaerobic tank; A bioprecipitation tank for physically precipitating microorganisms in the treated water treated with the aerobic tank; A biological treatment tank for aeration to temporarily store and homogenize the treated water treated in the bioprecipitation tank with a second solid-liquid separator; A second solid-liquid separator in which the undigested organic matter is aggregated in the treated water treated in the bioprecipitation tank and introduced into the first solid-liquid separator, and the discharged treated water from which the coagulated sludge is removed is discharged; Activated carbon tank for treating the treated water discharged from the second solid-liquid separator with activated carbon and aeration; And anaerobic digestion and digestion waste liquid treatment of organic wastewater comprising a sedimentation tank discharged after sludge sedimentation of the treated water treated in activated carbon. The method of claim 1,
The desulfurization means provided in the anaerobic digestion tank has a cover having an outlet for discharging the biogas generated in the digester to the upper side of the digester and an outlet for discharging the desulfurized biogas to the outside to cover the upper part of the digester, the upper part of the cover A gas bubble collecting biogas covers the upper part of the cover, and an air inlet for injecting air into the space between the cover and the gas bubble is installed at the outlet of the cover, and power is transferred to the air inlet. The blower is connected to the air inlet is installed on the outside of the digester, the external air supplied by the blower and the biogas generated in the digester reacts in the space between the cover and the gas bubble anaerobic organic wastewater Extinguishing and digestion waste purification device. 3. The method of claim 2,
Anaerobic digestion and digestion waste of organic wastewater comprising the front end of the air inlet to inject air upward from the outlet of the digester cover to flow biogas in the digester together with the air into the space between the digester cover and the gas bubble Purification apparatus. 3. The method of claim 2,
Anaerobic digestion of organic wastewater and digestion waste liquid purification apparatus comprising a drawer containing a crystal that is dropped in response to the air and biogas from the upper portion of the digester cover is opened and closed to one side of the digester cover. The method of claim 1,
The nitrogen removal means provided in the degassing tank covers the upper opening of the degassing tank with a degassing tank cover, forms an inlet on one side of the degassing tank cover, and forms an outlet on the other side, and at the inlet of the degassing tank cover. An anaerobic digestion and digestion waste treatment apparatus for organic wastewater, wherein the external air, which is powered by the blower, is connected to the blower and is introduced into the degassing tank and discharged together with the ammonia to the outlet of the degassing tank cover. 6. The method of claim 5,
Anaerobic digestion and digestion waste liquid purification apparatus for organic wastewater comprising the lower side of the outlet of the degassing tank cover to approach the surface of the treated water in the degassing tank. The method of claim 1,
Anaerobic digestion and digestion waste liquid purification apparatus for organic wastewater comprising a hot water pipe is installed on the wall or bottom of the degassing tank to heat the treated water inside the degassing tank with hot water. The method of claim 1,
The second solid-liquid separator separates the scum from the treated water treated in the biological treatment tank and stores the scum reservoir, and then inputs the scum to the first solid-liquid separator through the scum reservoir to anaerobic digestion of organic wastewater. And an apparatus for purifying digestive waste liquid.

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