KR100291580B1 - Treatment method of high-concentration organic wastewater and equipment thereof - Google Patents

Abstract

PURPOSE: A treatment method of high-concentration organic wastewater is provided, which can provide suitable aerobic fermentation condition for the husk bed thus maximizing fermentation heat generation to evaporate water content in organic matter rapidly. The optimum fermentation condition is produced by sufficient agitation and air supply to the husk. CONSTITUTION: The system comprises an aerobic fermentation bed(10), a moving device(20), an agitating device(30), a blower(50) and a compressor(60). In the fermentation bed(10), rice husk(S) is filled and organic wastewater of high concentration is sprayed thereon. The moving device(20) having agitating device(30) that consists of an agitation shaft(33), an impeller(34) and a shaft end(43), reciprocally moving along a guide rail(21), agitates the husk. This agitation makes the husk move upward and left and right side, forming sufficient pore space in the husk and supplying sufficient air to the husk, so that the heat generated from the aerobic decomposition of the husk makes the moisture evaporate to produce organic fertilizer of good quality.

Description

High concentration organic wastewater treatment method and treatment device

The present invention relates to the treatment by providing aerobic conditions to the fermentation bed (seeds such as chaff, sawdust, etc.) is sprayed by a certain amount of high concentration organic waste water every day, and more specifically, the moving means is running inside the fermentation bed while traveling means No matter how many times the driving (stirring air) is carried out by stirring (the material moves up and down and moving from side to side) at the same time, there is no loss of fermentation heat and no bad smell, and the moisture content inside the fermentation phase is high and the depth of fermentation depth is high. Even if deep, the oxygen supply is perfectly maintained to maintain rapid aerobic decomposition and high heat of fermentation to evaporate a large amount of water in a small amount of fermentation compared to existing fermentation facilities, and the remaining solids can be used as a stable organic fertilizer. The present invention relates to a method for treating high concentration organic wastewater and an apparatus for treating the same.

In general, high concentration organic wastewater includes livestock and phosphorus manure mixed with wash water and sewage, wastewater from food processing and mixtures thereof (water content: 92-98%, TCODcr 20mmg / l or more, VS 1.5% or more, PH 6-8) As such, high concentration organic wastewater has no choice but to select a no-discharge method by evaporation due to the difficulty in applying the purification treatment in the treatment, and has been mainly treated by applying a thermal drying facility and an aerobic fermentation facility of organic waste.

In the above-mentioned fire-drying facility, when the evaporation of the liquid substance having a moisture content of 92% or more, the capacity of the facility should be increased due to the prolonged processing time, and the fuel cost is also high. Therefore, after mixing moisture control materials such as sawdust and lowering the water content to 75% or less, It is being put into a drying facility In this treatment method, the cost of mixing the moisture control materials such as sawdust, rice hull, and large fat rice is greater than the fuel cost, so if the fuel cost and the moisture control material (based on the use of large fat rice 15,000 won / m ³ ) are combined, the processing cost is increased. In addition to the high cost burden of nearly 20,000 won per tonne of processed materials, compost sales income is also low due to the deterioration of compost quality.

The above aerobic fermentation facility is mixed with high concentration organic wastewater (don slurry) with inflators such as sawdust and adjusted to around 60% of moisture content, put into fermentation and flipping it and contacting with air in the air (overturning method) and The method of directly injecting air from the bottom during fermentation (bottom blowing) is applied. The flip method includes escalator type, rotary type, bucket elevator type, etc. according to the stirring method, and the oxygen supply is good because the materials inside the fermentation phase are in direct contact with the air in the fermentation phase. It does not improve the phenomenon that the oxygen content inside is rapidly decreased. (If the number of flips is frequent, the temperature of fermentation drops and adversely affects water evaporation.)

Therefore, the number of turnovers should be carried out less than twice a day, and mixed with organic wastewater such as sawdust, chaff, etc., and adjusted to around 60% water content, and the depth of fermentation is 1.2 m (overturning method), 1.8m ( In the case of the above flipping method, a bottom blower may be additionally installed in the fermentation facility in order to improve treatment efficiency.

However, the biggest problem with the use of fermentation facilities is that the amount of inflated materials such as sawdust and rice husk needed to be adjusted to aerobic fermentation, that is, 60% moisture content and 0.5 specific gravity, and the cost of treating 1 ton of slurry at the cost According to the pre-drying method by 1 ~ 4m ³ , the purchase price (as of '97) was a sawdust and rice hull 22,500 won / m ³ _, 11,000 won / m ^{3 respectively} , there was a disadvantage that enormous costs for the treatment.

The present invention has been researched and developed in order to effectively solve the problems of the prior art as described above provides the following object.

The object of the present invention is to maximize the production of fermentation heat by providing sufficient aerobic conditions in fermentation.

That is, the water content of the appropriate to meet the aerobic conditions in the fermentation bed is 60% in the conventional case, but the present invention achieves an excellent oxygen supply effect even at 75% moisture content conditions to provide a fast decomposition rate of organic components and at the same time maintain a high fermentation temperature It is not a WINDROW method but a kind of batch type that allows the whole fermentation phase to maintain even temperature.

It is an object of the present invention to provide treatment of organic wastewater to minimize heat loss and odor generation during fermentation by oxygen supply (stirring and blowing).

That is, the present invention minimizes the drop in the temperature of the fermentation even if the number of running of the moving means (stirring blowing means) even in the cold winter, and because the stirring and blowing is made inside the fermentation phase rather than the conventional flipping method to minimize the occurrence of odor It is in one thing.

It is an object of the present invention to provide maximal reduction in the volume requirements of fermentation and the reduction of BULKING AGENT requirements and costs per throughput.

In other words, while the conventional facility which uses expensive sawdust as an inflating material and mixes with high concentration organic wastewater and inputs it into fermentation phase, the inflation material has a large amount of requirement for adjusting the initial moisture content of the organic wastewater to 60%, while the present invention provides oxygen supply efficiency. It is excellent and can keep high fermentation heat continuously without dropping fermentation temperature during stirring and blowing. By maximizing moisture evaporation, a large amount of bulging material (chaff) is pre-filled in fermentation and the waste water is sprayed every day for a long time. Even the treatment results in a drastic reduction in the amount of swelling material than conventional ones.

An object of the present invention is spraying a high concentration of organic wastewater every day in aerobic fermentation bed (10) filled with bulging material such as rice husk, sawdust, etc., the moving means 20 while reciprocating the fermentation bed (10) At the same time as the stirring blade 34 of the stirring means 30 provided in the air is sprayed from the celebratory portion 43, spirally on the outer periphery of the stirring shaft 33 at a predetermined angle and a predetermined interval The material S is conveyed to the upper side by the agitating blade 34 configured as well, and the air is injected from the lower part of the stirring shaft 43 so that the air gap is enlarged through the left and right sides. It is easily contacted with, and excellent oxygen supply effect and mixing effect of left, right, top and bottom of material (S) enables rapid decomposition of organic components and production and maintenance of high fermentation heat to maximize water evaporation and maturity of organic materials. High concentrations by producing compost It can be accomplished by treatment zero discharge of organic wastewater.

1 is an overall configuration diagram of an apparatus of the present invention,

2 is a front configuration diagram of the apparatus of the present invention;

Figure 3 is a rotational operation as a part omitted side configuration of the device of the present invention,

Figure 4 is an enlarged partial cutaway showing the configuration of the stirring shaft of the device of the present invention,

5 is an enlarged view of the line I-I of FIG. 4;

6 is an operating state of the present invention.

〈Description of the symbols for the main parts of the drawings〉

10: phase of fermentation 20: means of transportation

30: stirring means 33: stirring shaft

34: stirring blade 35: drive motor

37: blocking plate 38: air outlet

39: round bar 40: supply hose

42: distribution pipe 43: lower stirring shaft

50: broa 51,61: connection hose

60: compressor 70: fitting means

80: oil, pneumatic cylinder S: a mixture of chaff and high concentration organic wastewater

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

First, the treatment method of the present invention is previously filled with a volume of rice hulls corresponding to about 30 times the daily treatment wastewater in the aerobic fermentation phase and at the same time evenly spraying the high concentration organic wastewater on the fermentation bed.

Under this precondition, the processing method of the present invention will be described with reference to FIG. 1, and the processing apparatus of the present invention will be described with reference to FIGS.

That is, the treatment method of the present invention is agitated by the stirring means provided in the moving means while the moving means constituted on the upper phase of the exhalation fermentation, the stirring means is configured to rotate the hollow stirring shaft;

The hollow stirring shaft is supplied with air from the broa and rotates while injecting air from the lower portion of the stirring shaft, and the stirring material is transferred upward by a stirring blade composed of a predetermined angle and a predetermined interval spirally on the outer circumference. By circulating and circumventing in the circumferential direction of the stirring shaft, sufficient voids are formed in the treated material to facilitate air contact, thereby providing a method of producing a lot of aerobic decomposition heat and evaporating moisture due to the decomposition heat.

In this case, the supply air may be supplied to the hot air air by a separate filtration means to adjust the fermentation temperature of the treated material, or by installing and heating a hot water boiler on the bottom of the fermentation to promote evaporation.

Alternatively, the present invention provides a method of evaporating by stirring while supplying air while connecting a compressor to the stirring shaft to intermittently shoot high pressure air to prevent the lower end of the stirring shaft from being blocked by the material.

The apparatus of the present invention that specifically implements the method of the present invention will be described.

That is, in the treatment apparatus of the present invention, as shown in FIGS. 1 to 5, the chaff is prefilled inside the aerobic fermentation phase 10, and at the same time, a high concentration of organic wastewater is sprayed onto the upper surface of the fermentation phase 10. In the guide rail 21 formed in the aerobic fermentation phase (10) while the moving means 20 is reciprocated by roller driving the material (S) mixed with the chaff and high concentration organic waste water by the stirring means (30) Evaporate with stirring,

The stirring means 30 is the support housing 31 is axially coupled to the central shaft 32 in the moving means 20, but the angle is adjustable to 90 degrees, the support housing 31 in the outer periphery A plurality of hollow stirring shafts 33 are arranged in a spiral direction, the stirring blades 34 having a predetermined angle and predetermined intervals are axially coupled vertically, and each of the hollow stirring shafts 33 is coupled to the upper portion. The drive gears 35 and 35 of the drive motors 35 and 35 configured as the interlocking sprockets are chained with the drive gears 36 and the chains 36 to be rotatable.

At this time, each of the hollow stirring shaft 33 is connected to communicate with the flexible supply hose 40 to the distribution pipe 42 is fixed to the support housing 31, the flexible supply hose 40 is a bearing It is coupled to the stirring shaft 33 via the means 41, the distribution pipe 42 is composed of a broa 50 is connected to the connection hose 51, the connection hose 51 is a separate fitting means ( Connection is made via 70).

The supply hose 40 can supply air from the distribution pipe while being prevented from being twisted by the bearing means 41 even when the stirring shaft 33 is rotated, and the stirring shaft 33 receives air at the same time as the rotation of the stirring shaft 33. It is made to discharge to the stirring shaft lower part 43.

At this time, by connecting the separate compressor (60) to the distribution pipe (42) by the connecting hose (61) to intermittently shoot the compressed air to the stirring shaft (33) by the compressor (60) The lower portion 43 of the shaft 33 may be configured to prevent clogging by the material (S).

The compressor 60, even if the connection configuration is omitted, each of the hollow stirring shaft 33 of the present invention, the blocking plate 37 is fixed to the lower portion 43 of the cylindrical air discharge port 38, 38 is formed and fixed, and the round bar 39 is fixed to the cross to fix the material S in the inside of the stirring shaft 33 on the upper part of the blocking plate 37, so that the material S Prevention of clogging is achieved.

In addition, the stirring blade 34 which is fixed in a spiral to the stirring shaft 33 is fixed upwardly at an angle within 45 degrees with the stirring shaft 33 has the action of pumping up the material (S) to the upper by rotation At the same time, the stirring blade 34 has a curved blade 34a formed to chop the material S in the rotational direction of the stirring shaft 33 or to facilitate crushing and to reduce power load.

On the other hand, the stirring means 30 is fixed to the coupling link 32a at both ends of the central shaft 32 of the support housing 31, the coupling link is hinged on the transfer means 20 The hinge shaft is coupled to the rod 81 of the pneumatic cylinder 80 to rotate the support housing 31 by advancing and retracting the rod 81 of the oil / pneumatic cylinder 80 to angle the stirring shaft 33. It was adjusted.

1 and 6, the moving means 20 moves the guide rail 21 reciprocally by roller driving by a driving means (not shown). Each stirring shaft 33 of the stirring means 30 provided in 20 is driven by the drive motors 35 and 35 to drive the chain 36 in rotation.

Simultaneously with the rotation of the stirring shaft 33, the stirring shaft 33 receives air from the blower 50 while agitating while spraying air from the lower portion of the processing material S of the aerobic fermentation bed 10.

At this time, the material (S) is transported and circulated to the top by a stirring blade 34 composed of a predetermined angle and a predetermined interval spirally on the outer periphery of the stirring shaft 33, the stirring operation is made by stirring (S At the same time, air (oxygen) supply is achieved.

In the present invention, the scattering phenomenon of the material S due to the rotation of the stirring shaft 33 makes a gap in the deposited material and at the same time makes contact with the supply air injected from the end of the stirring shaft 33 sufficiently. Even if the moisture content of the material is high and the depth of the aerobic fermentation bed 10 is deep, the supply of oxygen (air) is very good, and the processing efficiency thereof is maximized, and the rotation of the stirring shaft 33 also in the operation of the apparatus of the present invention. At the same time the horizontal movement is made by the moving means 20 to reduce the load of the device operation.

In particular, the present invention when the depth of the exhalation fermentation phase (10) of the stirring means 30 by operating the oil, pneumatic cylinder (80, 80) installed in the moving means 20 as mentioned above Agitating operation is provided while angularly displacing the support housing 31 and angularly displacing the stirring shaft 33 condensed thereon while supplying air to the middle and upper portions of the material S injected into the fermentation phase 10. This provides high evaporation of the material (slurry).

The present invention is applied to the fermentation evaporation treatment of high concentration organic wastewater (waste), such as livestock manure mixture (slurry) and livestock manure, phosphorus manure, food waste, alcoholic wastewater, improve the fermentation evaporation efficiency, expensive as a moisture control material As a substitute for sawdust, chaff can be used 100% and chaff requirements can be minimized.

Therefore, even if the required volume of fermentation is less than one third of the existing throughput, it is possible to reduce the facility cost because it is equivalent to the existing throughput.

The present invention can be utilized in food farms, such as livestock farms and livestock manure joint treatment plant, organic fertilizer plant, environmental establishments, spirits.

Oxygen change and temperature change before and after stirring of the aerobic fermentation phase by the practice of the present invention to demonstrate this invention are shown in Table 1 and Table 2 below.

Oxygen change before and after stirring division Slurry input amount (ℓ / m ³ .day) Remarks 96 4 minutes after stirring, 10 minutes after stirring, 30 minutes after stirring, 60 minutes after stirring, 6 hours after stirring 2.9% 201915.75.1 -Moisture content of fermented rice husk: 70 ~ 75%-Atmospheric oxygen content: 20.9%-Depth of measurement: 1.05m (fermentation bed depth 2.5m)

Temperature change before and after stirring division Fermentation Depth Remarks 30 cm 60 cm 90 cm 10 minutes after stirring, 30 minutes after stirring, 6 hours after stirring 70687070 62636363 47464648 -Indoor temperature 40-External temperature 32-Daily dose: 40ℓ / m ³ (Experimental condition 3m ³ / Fermentation 75m ³

As shown in the table above, the moisture content of the fermentation phase of the material (slurry) is 70-75%, which is very high, but after 10 minutes of stirring, the oxygen content of the fermentation bed is 19% (20.9% oxygen content in the air). It was found that the oxygen supply was good even at high and deep fermentation depths.

In particular, the present invention is not the up-and-down circulation of the conventional inverting method, but because the stirring and blowing at the same time inside the fermentation phase at the same time, the temperature difference of the fermentation phase before and after stirring appeared to ± 1 ~ 2 ℃ after 10 minutes of stirring, the bottom part of the fermentation The overwater and gravity condensation of the material was improved because the material was transported to the upper part during stirring.

As described in detail above, the present invention has the following effects.

First, the present invention has the effect of solving the difficulty of purifying the high concentration of organic wastewater by using the organic compost as a fundamental prevention of water pollution by the water vaporization treatment by the heat of aerobic decomposition of the high concentration organic wastewater.

Second, the present invention has a high decomposition effect by providing a fast decomposition rate of organic components by maximizing the production of fermentation heat by providing sufficient aerobic conditions in fermentation.

Third, the present invention has the effect of minimizing the heat loss and odor generation in the fermentation phase by oxygen supply (stirring and blowing) by the stirring and blowing inside the fermentation phase.

Fourth, the present invention has the effect of reducing the required volume of the equivalent amount of fermentation treatment, the amount of swelling material and cost.

Claims (9)

After filling the chaff inside the aerobic fermentation phase and spraying high concentration organic wastewater on the upper surface of the fermentation phase, the mixed material is stirred by the agitating means provided in the moving means while the moving means configured on the upper side of the aerobic fermentation phase reciprocates. Processing, the stirring means is configured to rotate the hollow stirring shaft; The hollow stirring shaft is supplied with air from the broa and rotates while injecting air from the lower portion of the stirring shaft, and the stirring material is transferred upward by a stirring blade composed of a predetermined angle and a predetermined interval spirally on the outer circumference. A method of treating high concentration of organic wastewater, characterized in that it evaporates water and generates solid compost by generating high aerobic heat by simultaneously supplying air with sufficient pore formation and air at the same time while circulating to the left and right. The method of claim 1, The supply air is supplied to hot air by separate filtration means or a hot water boiler is disposed on the bottom of the fermentation phase to treat while controlling the fermentation temperature of the treated material, characterized in that the treatment of high concentration organic wastewater. The method of claim 1, The stirring shaft is connected to a compressor to intermittently blast the high-pressure air to prevent the lower portion of the stirring shaft blocked by the material while stirring to evaporate treatment method of high concentration organic wastewater. The moving means 20 moves the guide rail 21 formed in the fermentation phase 10 in the state in which the chaff is filled in the fermentation phase 10 and the organic wastewater is sprayed on the upper surface of the fermentation phase 10. While the roller is reciprocated to move reciprocating while stirring the material (S) mixed with the chaff and high concentration organic waste water by the stirring means 30, The stirring means 30 is the support housing 31 is axially coupled to the central shaft 32 in the moving means 20, the angle is adjustable to be adjusted to 90 degrees, the support housing 31 is outer peripheral edge A plurality of hollow stirring shaft 33 is configured to be axially coupled in a vertical direction, the stirring blade 34 is formed in a spiral at a predetermined angle and a predetermined interval, each of the hollow stirring shaft 33 is coupled to the upper linkage An apparatus for treating high concentration organic wastewater, characterized in that the sprocket is configured to be rotatable by chain drive with a drive gear of the drive motors 35 and 35 configured to be left and right. The method of claim 4, wherein The moving means 20 moves the guide rail 21 formed in the fermentation phase 10 in a state in which the chaff is filled in the fermentation phase 10 and the organic wastewater is sprayed on the upper surface of the fermentation phase 10. While the roller is reciprocated to move reciprocating while stirring the material (S) mixed with the chaff and a high concentration of organic wastewater by the stirring means 30, The stirring means 30 is the support housing 31 is axially coupled to the central shaft 32 in the moving means 20, the angle is adjustable to be adjusted to 90 degrees, the support housing 31 is outer peripheral edge A plurality of hollow stirring shafts 33 are arranged in a spiral in a plurality of stirring blades 34 are installed in the vertical direction, each of the hollow stirring shafts 33 is composed of left and right interlocking sprockets coupled to the upper The drive device of the drive motor (35, 35) and the chain drive the chain 36 to the high concentration organic wastewater treatment device, characterized in that the rotatably arranged. The method according to claim 4 or 5, The distribution pipe 42 is connected to the separate compressor (60) by the connection hose 61 so as to shoot compressed air intermittently to the stirring shaft 33 by the compressor 60 to the hollow stirring shaft ( 33) is an apparatus for treating high concentration organic wastewater, characterized in that the lower 43 is configured to prevent clogging by the material (S). The method according to claim 4 or 5, Each of the hollow stirring shafts 33 is fixed to the lower plate 43, the blocking plate 37 is fixed to form a cylindrical air discharge port (38, 38) on both sides, the upper portion of the blocking plate 37 The inside of the stirring shaft (33) of the high concentration organic wastewater treatment apparatus, characterized in that the round bar (39) is fixed in the cross shape to block the incoming material (S). The method according to claim 4 or 5, The stirring blade 34 fixed to the stirring shaft 33 in a spiral shape is fixed upward at an angle within 45 degrees with the stirring shaft 33, and the blade 34a in a curved state in the rotational direction of the stirring shaft 33. ) Is a high concentration organic wastewater treatment apparatus, characterized in that is formed. The method according to claim 4 or 5, The stirring means 30 is fixed to the connecting links 32a at both ends of the central shaft 32 of the support housing 31, the connecting link is hinged on the conveying means 20, pneumatic It is hinged to the rod 81 of the cylinder 80 to rotate the support housing 31 by the advancing and retracting operation of the rod 81 of the hydraulic, pneumatic cylinder 80 to adjust the stirring shaft 33 to the angle High concentration organic wastewater treatment apparatus, characterized in that made.