CN105080931B - A kind of processing method for the dregs of fat that Dairy products sewage disposal process produces - Google Patents
A kind of processing method for the dregs of fat that Dairy products sewage disposal process produces Download PDFInfo
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- CN105080931B CN105080931B CN201510451796.7A CN201510451796A CN105080931B CN 105080931 B CN105080931 B CN 105080931B CN 201510451796 A CN201510451796 A CN 201510451796A CN 105080931 B CN105080931 B CN 105080931B
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Abstract
A kind of processing method for the dregs of fat that Dairy products sewage disposal process produces, belong to the process field of the discarded animal oil residual oil fat produced in sewage disposal process, including pre-processing, liquefying, fermenting, precipitating several steps, pretreatment by the dregs of fat carry out the abundant homogeneous of mechanical agitation, if temperature continue to exceed 24 it is small when be less than 10 DEG C when to the dregs of fat carry out heat control temperature；The dregs of fat are liquefied by special strain after pretreatment, and solid-state is converted to liquid, sewage miscible with water, reduces COD；The dregs of fat for being liquefied as sewage are degraded into fermenting tank for fermentation, reduce COD pollutants, so as to mitigate the load to sewage disposal system, supernatant after precipitation enters sewage disposal system, the sludge reflux to precipitate is to cracklings tempering apparatus or is directly entered in dregs of fat liquefier and supplements strain, and the present invention is using biologic treating technique on the spot, after the dregs of fat are handled in the system, sewage disposal system degraded and processing are directly entered, realizes the digestion in pollutant factory.
Description
Technical field
The present invention relates to a kind of process field of animality dregs of fat grease, more particularly in Dairy products sewage disposal process
The processing method of the waste oil residue grease of generation.
Background technology
The relevant content of dregs of fat grease treatment technology, mainly based on kitchen waste oil residue grease, to this type dregs of fat
Processing mainly have Simple heating refine recycling and preparing biological diesel oil processing.
But for the dregs of fat grease contained in dairy enterprises sewage effluent, this part especially separated from sewage
The dregs of fat, after being isolated from sewage, it is difficult to be handled.On the one hand because the dregs of fat separated from sewage, eat with general
The grease of kitchen industry is compared, and component is relatively complicated, and containing sludge, suspended solid etc., is not properly suited for production biology
Diesel oil；On the other hand, since the COD concentration of dregs of fat grease is usually very high, generally 28~30 × 104Mg/l, this concentration
Material can not be dissolved by general sewage disposal system.The third aspect, dairy products factory are normally at more remote garden
Area, does not have the production base of biodiesel nearby, and it is relatively fewer to be additionally, since dregs of fat yield, if using long-distance transportation, transports
Defeated costly, comprehensive cost is higher than income.
At present, in dairy enterprises, this part dregs of fat of generation, the processing method of generally use is, in sewage plant
Sludge compress together, be dehydrated after transport outward, generally require further Treatment of Sludge, such as fill, at freight and sludge
Manage costly.
The content of the invention
A kind of in order to solve the above technical problems, place of the dregs of fat produced the present invention provides Dairy products sewage disposal process
Reason method, the solidification state dregs of fat lighter than water can be changed into can be miscible with water liquid, so as to be directly entered sewage
Processing system, it is not necessary to transport outward, can be degraded and handled in sewage plant.
To achieve the above object, technical scheme includes the following steps：
(1), pre-process, the dregs of fat that oil separator or flotation tank are isolated are collected into oil storage pool, stirring is set in oil storage pool
Device, carries out mechanical agitation, by the abundant homogeneous of the dregs of fat；In oil storage pool stir homogeneous the dregs of fat when temperature continuous 24 is small more than be less than
Enter cracklings tempering apparatus at 10 DEG C, dregs of fat temperature is controlled, should ensure that reaction temperature is in the range of 10~35 DEG C；The dregs of fat add
Hot device sets bypass and surmounts pipe, in the case where environment temperature meets requirement, in oil storage pool stir homogeneous the dregs of fat without
Cracklings tempering apparatus, is directly entered dregs of fat liquefier；
(2), liquefy, the pretreated dregs of fat are promoted to dregs of fat liquefier through pump for residue of oil, and solidification state, proportion are lighter than water
The dregs of fat, by the effect of specified strain, are converted to liquid, sewage miscible with water；Dregs of fat liquefier upper end sets firedamp drainage pipe,
For collecting methane reuse；
(3), ferment, the sewage of dregs of fat liquefier enters dregs of fat fermentor, and the dregs of fat for being liquefied as sewage are degraded, are reduced
COD pollutants, so as to mitigate the load to sewage disposal system；During the dregs of fat of degrading, activated sludge decomposes fermentor
Organic substance in the dregs of fat, while pollution degradation, produces substantial amounts of biogas, and fermentor upper end sets collecting methane pipe, uses
In collecting methane reuse；
(4), precipitate, the water outlet of dregs of fat fermentor is precipitated into sedimentation basin, and the supernatant after precipitation enters at sewage
Reason system, the sludge dregs of fat mixture to precipitate are back to cracklings tempering apparatus or are directly entered the dregs of fat by sludge reflux pump
In liquefier, dregs of fat fermentor is entered back into, plays the role of supplementing strain.
The processing method for the dregs of fat that a kind of Dairy products sewage disposal process of the present invention produces, the storage of the step (1)
Liquid level gauge is equipped with oil sump, for controlling the start and stop of pump for residue of oil.When liquid level gauge is in high liquid level, starts pump for residue of oil, work as liquid level
When meter is in low liquid level, stop pump for residue of oil.
The processing method for the dregs of fat that a kind of Dairy products sewage disposal process of the present invention produces, dregs of fat liquid in step (2)
Change 8~20d of device residence time, the dosage of activated sludge is the 20%~30% of tank volume.
The processing method for the dregs of fat that a kind of Dairy products sewage disposal process of the present invention produces, the dregs of fat are sent out in step (3)
Ferment device is divided into 2 separate tanks, and each pond body is internally provided with blender and plays the role of stirring and homogeneous, inside fermentor, throws
Add the strain by special domestication, the dosage of activated sludge is typically about the 70~80% of tank volume, total residence time 16
~40d；
The processing method for the dregs of fat that a kind of Dairy products sewage disposal process of the present invention produces, in step 4), sedimentation basin
8~10h of sedimentation time, the load of settling vessel is not more than 0.9m3/m2H, the reflux ratio of sludge reflux pump is 100~200%.
The cracklings tempering apparatus of the present invention, as the energy, is not consumed the energy additionally, done using the biogas produced in sewerage
Efficiently using for the energy is arrived.In addition the present invention is using biologic treating technique on the spot, after the dregs of fat are handled in the system, COD from
28~30 × 104Mg/l is reduced to 300~2000mg/l, state from the solidification state lighter than water be changed into can be miscible with water liquid
State, so as to be directly entered sewage disposal system, can be degraded and be handled in sewage plant, it is not necessary to be transported outward, also not
Need to handle outside factory, save the expense of transport, while save the medicament expense of sludge dewatering, the electricity charge of sludge dewatering equipment, people
The operating quantity of work, realizes the digestion in pollutant factory.
Brief description of the drawings
Fig. 1 is present invention process flow diagram
Each label implication is as follows in figure：1st, oil storage pool；2nd, the dregs of fat heat；3rd, dregs of fat liquefier；4th, dregs of fat fermentor；5 oil
Slag fermentor；6th, dregs of fat settling vessel；7th, liquid level gauge；8th, mixer；9th, pump for residue of oil；10th, blender；11, blender；12nd, stir
Device；13rd, sludge reflux pump
Embodiment
The technological process to the present invention is described in detail below in conjunction with the accompanying drawings
The solid dregs of fat lighter than water, this hair can be produced in milk product waste processing procedure, in oil separator or flotation tank
It is bright to be handled this part dregs of fat, by its state from the solidification state lighter than water be changed into can be miscible with water liquid, the dregs of fat
Sewage disposal system acceptable scope is greatly reduced in COD, so as to be directly entered sewage disposal system, in sewage
It can be degraded and be handled in factory.Step is as follows：
(1) pre-process, the dregs of fat that oil separator or flotation tank are isolated are collected into oil storage pool 1, sets and stirs in oil storage pool 1
Machine 8 is mixed, mechanical agitation is carried out, by the abundant homogeneous of the dregs of fat；In oil storage pool 1 stir homogeneous the dregs of fat when temperature continuous 24 is small more than
Enter cracklings tempering apparatus 2 during less than 10 DEG C, dregs of fat temperature is controlled, should ensure that dregs of fat reaction temperature is 10~35 DEG C of scopes
It is interior；Cracklings tempering apparatus, as the energy, is not consumed the energy additionally, has accomplished the effective of the energy using the biogas produced in sewerage
Utilize.Cracklings tempering apparatus sets bypass and surmounts pipe, and in the case where environment temperature meets requirement, homogeneous is stirred in oil storage pool 1
The dregs of fat without cracklings tempering apparatus 2, be directly entered dregs of fat liquefier 3；Liquid level gauge 7 is additionally provided with the oil storage pool 1, is used for
Control the start and stop of pump for residue of oil 9.When liquid level gauge is in high liquid level, start pump for residue of oil 9, when liquid level gauge is in low liquid level, stop
Pump for residue of oil 9；
(2) liquefy, the pretreated dregs of fat are promoted to dregs of fat liquefier 3 through pump for residue of oil 9, and dregs of fat liquefier 3 is equipped with stirring
Device 10, plays the role of stirring and homogeneous, and the strain by special domestication is added to dregs of fat liquefier 3, by solidification state, light specific gravity
Liquid, sewage miscible with water are converted in the dregs of fat of water；The dosage of activated sludge is about tank volume in dregs of fat liquefier 3
20~30%, the total residence time of the dregs of fat wherein is 8~20d.Into the dregs of fat of dregs of fat liquefier, COD for 28~30 ×
104Mg/l, after liquefaction reaction, COD is reduced to 6~7 × 104mg/l.3 upper end of dregs of fat liquefier sets firedamp drainage pipe, is used for
Collecting methane reuse；
(3) ferment, the sewage of dregs of fat liquefier 3 sequentially enters dregs of fat fermentor 4 and dregs of fat fermentor 5, will be liquefied as dirt
The dregs of fat degraded of water, reduces COD pollutants, so as to mitigate the load to sewage disposal system；Dregs of fat fermentor is in the degraded dregs of fat
During, activated sludge decomposes the organic substance in the dregs of fat, while pollution degradation, produces substantial amounts of biogas, the dregs of fat
Fermentor 4 and 5 upper end of dregs of fat fermentor set collecting methane pipe, for collecting methane reuse；Dregs of fat fermentor 4 and dregs of fat fermentor
5 be two separate tanks, is connected among two pond bodies by hole or cross over pipe；Each pond body is internally provided with blender 11 and stirs
Device 12 is mixed, blender need to highly be designed according to tank body, generally set two~tetra- groups of blades, while play the stirring work of axial direction, radial direction
With making to form uniform distribution and good mixing condition in pond body, easy to the mixing of the dregs of fat, sludge, liquid；Blender is selected
Resistant material；The dosage of dregs of fat fermentor activated sludge is typically about the 70~80% of tank volume, total residence time 16
~40d.Into the dregs of fat of fermentor, COD is 6~7 × 104Mg/l, after two-stage fermentation, mixed liquor in dregs of fat fermentor
COD is reduced to 8000~12000mg/l.
(4) precipitating, the water outlet of dregs of fat fermentor 5 is precipitated into sedimentation basin 6,8~10h of sedimentation time of sedimentation basin,
The load of settling vessel is not more than 0.9m3/m2H, the supernatant C OD concentration after precipitation are reduced to 300~2000mg/l, are directly entered
Sewage disposal system, without causing any impact to sewage disposal system.The sludge dregs of fat mixture to precipitate passes through dirt
Mud reflux pump 13, is back to cracklings tempering apparatus 2 or is directly entered in dregs of fat liquefier 3, enter back into dregs of fat fermentor 4, play benefit
The effect of strain is filled, the reflux ratio of sludge reflux pump is 100~200%.
Claims (5)
1. a kind of processing method for the dregs of fat that Dairy products sewage disposal process produces, including the following steps：
(1), pre-process, the dregs of fat that oil separator or flotation tank are isolated are collected into oil storage pool, blender is set in oil storage pool, into
Row mechanical agitation, by the abundant homogeneous of the dregs of fat；In oil storage pool stir homogeneous the dregs of fat when temperature continuous 24 is small more than be less than 10 DEG C
When enter cracklings tempering apparatus, dregs of fat temperature is controlled, should ensure that reaction temperature in the range of 10~35 DEG C；Cracklings tempering apparatus
If bypass surmounts pipe, the dregs of fat of homogeneous are stirred in the case where environment temperature meets requirement, in oil storage pool without the dregs of fat
Heater, is directly entered dregs of fat liquefier；
(2), liquefy, the pretreated dregs of fat are promoted to dregs of fat liquefier through pump for residue of oil, and solidification state, proportion are lighter than to the oil of water
Slag, by the effect of specified strain, is converted to liquid, sewage miscible with water；Dregs of fat liquefier upper end sets firedamp drainage pipe, uses
In collecting methane reuse；
(3), ferment, the sewage of dregs of fat liquefier enters dregs of fat fermentor, and the dregs of fat for being liquefied as sewage are degraded, it is dirty to reduce COD
Thing is contaminated, so as to mitigate the load to sewage disposal system；During the dregs of fat of degrading, activated sludge decomposes in the dregs of fat fermentor
Organic substance, while degradation of contaminant, produce substantial amounts of biogas, fermentor upper end sets collecting methane pipe, for natural pond
Gas collects reuse；
(4), precipitate, the water outlet of dregs of fat fermentor is precipitated into sedimentation basin, and the supernatant after precipitation enters sewage disposal system
System, the sludge dregs of fat mixture to precipitate are back to cracklings tempering apparatus or are directly entered dregs of fat liquefaction by sludge reflux pump
In device, dregs of fat fermentor is entered back into, plays the role of supplementing strain.
2. the processing method for the dregs of fat that a kind of Dairy products sewage disposal process according to claim 1 produces, its feature
It is to be equipped with liquid level gauge in the oil storage pool of step (1), for controlling the start and stop of pump for residue of oil, when liquid level gauge is in high liquid level, opens
Dynamic pump for residue of oil, when liquid level gauge is in low liquid level, stops pump for residue of oil.
3. the processing method for the dregs of fat that a kind of Dairy products sewage disposal process according to claim 2 produces, its feature
It is the dregs of fat 8~20d of residence time in dregs of fat liquefier in step (2), the dosage of activated sludge is tank volume
20%~30%.
4. the processing method for the dregs of fat that a kind of Dairy products sewage disposal process according to claim 3 produces, its feature
It is in step (3) that dregs of fat fermentor is divided into 2 separate tanks, each pond body is internally provided with blender and plays stirring and homogeneous
Effect, inside fermentor, adds the strain by special domestication, the dosage of activated sludge be generally tank volume 70~
80%, 16~40d of total residence time.
5. the processing method for the dregs of fat that a kind of Dairy products sewage disposal process according to claim 4 produces, its feature
It is in step (4), 8~10h of sedimentation time of sedimentation basin, the load of settling vessel is not more than 0.9m3/m2H, sludge reflux pump
Reflux ratio is 100~200%.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009072719A (en) * | 2007-09-21 | 2009-04-09 | Sanki Eng Co Ltd | Methane gas producing system for producing methane gas from organic waste such as garbage |
| CN103272830A (en) * | 2013-05-31 | 2013-09-04 | 鄂尔多斯市城市矿产研究开发有限责任公司 | Harmless treatment process of kitchen wastes |
| CN103882070A (en) * | 2012-12-23 | 2014-06-25 | 吕子玉 | Biodiesel preparation method |
| CN103965940A (en) * | 2014-04-28 | 2014-08-06 | 王军 | Scientific utilization of waste grease |
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2015
- 2015-07-29 CN CN201510451796.7A patent/CN105080931B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009072719A (en) * | 2007-09-21 | 2009-04-09 | Sanki Eng Co Ltd | Methane gas producing system for producing methane gas from organic waste such as garbage |
| CN103882070A (en) * | 2012-12-23 | 2014-06-25 | 吕子玉 | Biodiesel preparation method |
| CN103272830A (en) * | 2013-05-31 | 2013-09-04 | 鄂尔多斯市城市矿产研究开发有限责任公司 | Harmless treatment process of kitchen wastes |
| CN103965940A (en) * | 2014-04-28 | 2014-08-06 | 王军 | Scientific utilization of waste grease |
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