CN110342603A - A kind of pretreatment system and preprocess method of oily waste water - Google Patents
A kind of pretreatment system and preprocess method of oily waste water Download PDFInfo
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- CN110342603A CN110342603A CN201910075044.3A CN201910075044A CN110342603A CN 110342603 A CN110342603 A CN 110342603A CN 201910075044 A CN201910075044 A CN 201910075044A CN 110342603 A CN110342603 A CN 110342603A
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- waste water
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
Abstract
The invention discloses a kind of pretreatment system of oily waste water and preprocess method, pretreatment system includes oil product synthesis conditioning tank, comprehensive adjustment pond, biochemical treatment unit, several pretreatment pools, separate tank, pretreatment discharge bay and anaerobic jar；Preprocess method is the following steps are included: (1) biochemical pretreatment；(2) Anaerobic Treatment.The utility model has the advantages that processing system structure of the invention is simple, Yi Shixian；The present invention mixes the activated sludge with suction-operated with oily waste water again, and activated sludge is made sufficiently to draw the oil in waste water, reduces the oil content in waste water；The alkali carried in activated sludge simultaneously can come back in waste water, for adjusting the pH value of waste water, thereby reduce caustic dosage and cost for wastewater treatment, and avoid the waste to activated sludge.
Description
Technical field:
The invention patent belongs to industry environmental protection field, and in particular to a kind of pretreatment system of oily waste water and pretreatment side
Method.
Background technique:
With the development of economy, it was waited in steel refining, industrial production, oil exploitation and pesticide and food processing and production
Oily wastewater can be all generated in journey, these oils mainly in the form of four kinds exist, respectively dissolved oil, dispersed oil, oil slick and
Oil emulsion.
If drinking water source is by the pollution of oily wastewater, on the one hand, people and animals can catch, or even be also possible to meeting
Cause to poison by food, it is very harmful；In addition, containing a certain amount of carcinogen in oily wastewater, therefore may can improve
The disease incidence of the cancer of oily wastewater institute Polluted area；
The density of the normal pure water of the density ratio of oily wastewater wants small, once so oily wastewater is drained into rivers and lakes
In, it is attached on the water surface, atmosphere just can not be exchanged normally with gas in water, and the content of water oxygen constantly declines, aquatic
Plant can not normal growth, the quality of water body is severely impacted, and considerably reduces the utility value of water resource；
If oily wastewater is taken as irrigation water for irrigation soils, grease stain can be deposited on crop surface, and soil can not be with
Extraneous air effectively exchanges, and the accretion rate of soil is slack-off, to influence the normal growth of crop, or even also results in crop
Death.
Existing oily wastewater pretreatment system includes the collecting pit being sequentially communicated, oil separator, air floatation machine and comprehensive adjustment
Pond, existing oily wastewater preprocess method are that the oily wastewater for collecting collecting pit first passes through oil separator progress water-oil separating,
Waste water after separation passes through air-flotation process, is then fed into comprehensive adjustment pond, and aftertreatment systems are sent into after homogeneous average and are carried out
Biochemical treatment.
Oily waste water pretreatment is had the following problems using above-mentioned pretreatment system: 1, passing through oil separator filtration treatment
And the waste water oil content after air-flotation process is still higher in 20mg/L-250mg/L, be not able to satisfy subsequent biochemical processing into
Water oil content is less than the requirement of 20mg/L；2, it is needed when biochemical treatment in waste water plus alkali adjusts pH, contain alkali after biochemical treatment
Activated sludge by dehydration and drying after, be sent to boiler burning, result in the waste of alkali and activated sludge.
Summary of the invention:
The first purpose of this invention is to provide that a kind of structure is simple, the pretreatment system of the oily waste water of Yi Shixian.
Second object of the present invention is that providing one kind makes full use of activated sludge, and reduces the oily waste water of processing cost
The preprocess method of water.
On the one hand technical solution of the present invention discloses a kind of pretreatment system of oily waste water comprising oil product synthesis is adjusted
Save pond, comprehensive adjustment pond, biochemical treatment unit, several pretreatment pools, separate tank, pretreatment discharge bay and anaerobic jar；It is described
Oil product synthesis conditioning tank is connected to the inlet of first the pretreatment tank；The liquid outlet of each the pretreatment tank with it is adjacent
The pretreatment tank inlet connection；The inlet of the liquid outlet of the last one the pretreatment tank and the separate tank connects
Logical, the supernatant outlet of the separate tank is connected to the inlet of the pretreatment discharge bay, and the pretreatment discharge bay goes out
Liquid mouth is connected to the inlet of the anaerobic jar；The liquid outlet of the anaerobic jar is connected to the inlet in the comprehensive adjustment pond,
The liquid outlet in the comprehensive adjustment pond is connected to the inlet of the biochemical treatment unit, and the sludge of the biochemical treatment unit goes out
The sludge inlet communication of mouth and first the pretreatment tank.
It further, further include dewaterer；The sludge outlet of the biochemical treatment unit and the sludge of the dewaterer
Inlet communication, the sludge inlet communication of the sludge outlet of the dewaterer and first the pretreatment tank.
It further, further include sludge concentration tank；The sludge outlet of the separate tank respectively with the sludge concentration tank
Sludge import and the last one the pretreatment tank sludge inlet communication.
It further, further include flocculant storage tank；The charging of the discharge port of the flocculant storage tank and the dewaterer
Mouth connection.
It further, further include vapour source, the vapour source is connected to the air inlet of the pretreatment discharge bay.
It further, further include water sealed tank and collecting methane unit, the gas outlet of the anaerobic jar and the water sealed tank
Air inlet connection, the gas outlet of the water sealed tank is connected to the air inlet of the collecting methane unit.
Another aspect of the present invention also discloses a kind of preprocess method of oily waste water comprising following steps: (1)
Biochemistry pretreatment；(2) Anaerobic Treatment；
(1) biochemical pretreatment: it is 80% that the activated sludge of biochemical treatment unit obtains moisture content after dehydration
Activated sludge, then the activated sludge that moisture content is 80% is added to CODcr≤15000mg/L, oil content≤250mg/L, pH
In the oily waste water for being 40 DEG C for 3-5, temperature, 12-36h is then stirred in air atmosphere, adsorbs sludge sufficiently in waste water
Oil, reduce oily content in waste water to reach, the precipitation and separation for being then passed through 2-4h obtains CODcr≤15000mg/L, oil-containing
The sludge slurry that amount≤20mg/L, pH 5-8, the supernatant that temperature is 25 DEG C and moisture content are 96-99%, sludge slurry a part weight
It is newly added in oily waste water, another part is incinerated after dehydration and drying；
(2) Anaerobic Treatment: being heated to 30-40 DEG C by steam for the supernatant that the biochemical pretreatment of the step (1) obtains,
Then the anaerobic reaction for carrying out 2-4h obtains biogas and CODcr≤1500mg/L, oil content≤20mg/L waste water fermentation, biogas
It is collected, in waste water fermentation plus is sent to biochemical treatment unit after alkali adjusting pH value to 5-8 and carries out biochemical treatment.
Further, the revolving speed of dehydration is 2500-3000r/min in the step (1).
Further, flocculant, flocculant and work is added during dehydration activated sludge in the step (1)
Property sludge mass ratio be (1-2): 1000.
Advantages of the present invention: 1, processing system structure of the invention is simple, Yi Shixian；2, the present invention will have suction-operated
Activated sludge mixed again with oily waste water, so that activated sludge is sufficiently drawn the oil in waste water, reduce the oil content in waste water；
The alkali carried in activated sludge simultaneously can come back in waste water, for adjusting the pH value of waste water, thereby reduce caustic dosage
And cost for wastewater treatment, and avoid the waste to activated sludge.
Detailed description of the invention:
Fig. 1 is the overall structure diagram of the embodiment of the present invention.
Oil product synthesis conditioning tank 1, comprehensive adjustment pond 2, biochemical treatment unit 3, pretreatment pool 4, separate tank 5 pre-process out
Pond 6, anaerobic jar 7, dewaterer 8, flocculant storage tank 9, sludge concentration tank 10, vapour source 11, water sealed tank 12, collecting methane unit
13。
Specific embodiment:
Below in conjunction with attached drawing, by embodiment, the present invention is described in further detail.
Embodiment 1: as shown in Figure 1, a kind of pretreatment system of oily waste water comprising oil product synthesizes conditioning tank 1, synthesis
Conditioning tank 2,3,3 pretreatment pools 4 of biochemical treatment unit, separate tank 5, pretreatment discharge bay 6, anaerobic jar 7, dewaterer 8, flocculation
Agent storage tank 9, sludge concentration tank 10, vapour source 11, water sealed tank 12 and collecting methane unit 13；Oil product synthesizes conditioning tank 1 and first
The inlet of a pretreatment pool 4 is connected to；The liquid outlet of each pretreatment pool 4 is connected to the inlet of adjacent pretreatment pool 4；Most
The liquid outlet of the latter pretreatment pool 4 is connected to the inlet of separate tank 5, the sludge outlet of separate tank 5 respectively with sludge condensation
The sludge import in pond 10 and the sludge inlet communication of the last one pretreatment pool 4；It the supernatant outlet of separate tank 5 and pre-processes out
The inlet in pond 6 is connected to, and vapour source 11 be connected to the air inlet of pretreatment discharge bay 6, the liquid outlet of pretreatment discharge bay 6 and
The inlet of anaerobic jar 7 is connected to；The gas outlet of anaerobic jar 7 is connected to the air inlet of water sealed tank 12, the gas outlet of water sealed tank 12 with
The air inlet of collecting methane unit 13 is connected to；The liquid outlet of anaerobic jar 7 is connected to the inlet in comprehensive adjustment pond 2, comprehensive adjustment
The liquid outlet in pond 2 is connected to the inlet of biochemical treatment unit 3, the sludge outlet of biochemical treatment unit 3 and the sludge of dewaterer 8
The discharge port of inlet communication, flocculant storage tank 9 is connected to the feed inlet of dewaterer 8, and the sludge outlet of dewaterer 8 and first are pre-
The sludge inlet communication of processing pond 4；Processing system structure of the invention is simple, Yi Shixian.
Biochemical treatment unit 3 includes the pond sequentially connected second level A/O, secondary settling tank and coagulative precipitation tank.
Embodiment 2: the method for the pretreatment oily waste water of system described in embodiment 1 is utilized comprising following steps: (1) raw
Change pretreatment；(2) Anaerobic Treatment；
(1) biochemical pretreatment: the activated sludge of biochemical treatment unit 3 passes through dehydration, in dehydration activated sludge
During be added flocculant, the mass ratio of flocculant and activated sludge is 1:1000, and the revolving speed of dehydration is 2500r/
Min, obtain moisture content be 80% activated sludge, then by moisture content be 80% activated sludge be added to CODcr≤
15000mg/L, it oil content≤250mg/L, pH 3-5, in the oily waste water that temperature is 40 DEG C, then stirs in air atmosphere
12h makes sludge sufficiently adsorb the oil in waste water, reduces content oily in waste water to reach, the precipitation and separation for being then passed through 2h obtains
It is 96-99% to CODcr≤15000mg/L, oil content≤20mg/L, pH 5-8, the supernatant that temperature is 25 DEG C and moisture content
Sludge slurry, sludge slurry a part rejoins in oily waste water, and another part is incinerated after dehydration and drying；
(2) Anaerobic Treatment: the supernatant that the biochemical pretreatment of the step (1) obtains is heated to 30 DEG C by steam, so
The anaerobic reaction for carrying out 2h afterwards obtains biogas and CODcr≤1500mg/L, oil content≤20mg/L waste water fermentation, and biogas is received
Collection in waste water fermentation plus is sent to biochemical treatment unit 3 after alkali adjusting pH value to 5-8 and carries out biochemical treatment.
Embodiment 3: the method for the pretreatment oily waste water of system described in embodiment 1 is utilized comprising following steps: (1) raw
Change pretreatment；(2) Anaerobic Treatment；
(1) biochemical pretreatment: the activated sludge of biochemical treatment unit 3 passes through dehydration, in dehydration activated sludge
During be added flocculant, the mass ratio of flocculant and activated sludge is 1.5:1000, and the revolving speed of dehydration is
2750r/min, obtain moisture content be 80% activated sludge, then by moisture content be 80% activated sludge be added to CODcr≤
15000mg/L, it oil content≤250mg/L, pH 3-5, in the oily waste water that temperature is 40 DEG C, then stirs in air atmosphere
For 24 hours, so that sludge is sufficiently adsorbed the oil in waste water, reduce content oily in waste water to reach, the precipitation and separation for being then passed through 3h obtains
It is 96-99% to CODcr≤15000mg/L, oil content≤20mg/L, pH 5-8, the supernatant that temperature is 25 DEG C and moisture content
Sludge slurry, sludge slurry a part rejoins in oily waste water, and another part is incinerated after dehydration and drying；
(2) Anaerobic Treatment: the supernatant that the biochemical pretreatment of the step (1) obtains is heated to 35 DEG C by steam, so
The anaerobic reaction for carrying out 3h afterwards obtains biogas and CODcr≤1500mg/L, oil content≤20mg/L waste water fermentation, and biogas is received
Collection in waste water fermentation plus is sent to biochemical treatment unit 3 after alkali adjusting pH value to 5-8 and carries out biochemical treatment.
Embodiment 4: the method for the pretreatment oily waste water of system described in embodiment 1 is utilized comprising following steps: (1) raw
Change pretreatment；(2) Anaerobic Treatment；
(1) biochemical pretreatment: the activated sludge of biochemical treatment unit 3 passes through dehydration, in dehydration activated sludge
During be added flocculant, the mass ratio of flocculant and activated sludge is 2:1000, and the revolving speed of dehydration is 3000r/
Min, obtain moisture content be 80% activated sludge, then by moisture content be 80% activated sludge be added to CODcr≤
15000mg/L, it oil content≤250mg/L, pH 3-5, in the oily waste water that temperature is 40 DEG C, then stirs in air atmosphere
36h makes sludge sufficiently adsorb the oil in waste water, reduces content oily in waste water to reach, the precipitation and separation for being then passed through 4h obtains
It is 96-99% to CODcr≤15000mg/L, oil content≤20mg/L, pH 5-8, the supernatant that temperature is 25 DEG C and moisture content
Sludge slurry, sludge slurry a part rejoins in oily waste water, and another part is incinerated after dehydration and drying；
(2) Anaerobic Treatment: the supernatant that the biochemical pretreatment of the step (1) obtains is heated to 40 DEG C by steam, so
The anaerobic reaction for carrying out 4h afterwards obtains biogas and CODcr≤1500mg/L, oil content≤20mg/L waste water fermentation, and biogas is received
Collection in waste water fermentation plus is sent to biochemical treatment unit 3 after alkali adjusting pH value to 5-8 and carries out biochemical treatment.
The present invention mixes the activated sludge with suction-operated with oily waste water again, draws activated sludge sufficiently useless
Oil in water reduces the oil content in waste water；The alkali carried in activated sludge simultaneously can come back in waste water, for adjusting
The pH value of waste water thereby reduces caustic dosage and processing cost, and avoids the waste occurred to activated sludge.
It is the preferred embodiment of the present invention above, for those skilled in the art, is not departing from
Under the premise of the principle of the invention, several improvements and modifications can also be made, these improvements and modifications also should be regarded as guarantor of the invention
Protect range.
Claims (9)
1. a kind of pretreatment system of oily waste water comprising oil product synthesizes conditioning tank, comprehensive adjustment pond and biochemical treatment unit；
It is characterized in that, it further includes several pretreatment pools, separate tank, pretreatment discharge bay and anaerobic jar；The oil product synthesis is adjusted
Section pond is connected to the inlet of first the pretreatment tank；The liquid outlet of each the pretreatment tank and the adjacent pre- place
Manage the inlet connection in pond；The liquid outlet of the last one the pretreatment tank is connected to the inlet of the separate tank, and described point
From the supernatant outlet in pond with it is described pretreatment discharge bay inlet be connected to, it is described pre-process discharge bay liquid outlet with it is described
The inlet of anaerobic jar is connected to；The liquid outlet of the anaerobic jar is connected to the inlet in the comprehensive adjustment pond, the comprehensive tune
The liquid outlet in section pond is connected to the inlet of the biochemical treatment unit, the sludge outlet of the biochemical treatment unit and first
The sludge inlet communication of the pretreatment tank.
2. a kind of pretreatment system of oily waste water according to claim 1, which is characterized in that it further includes dewaterer；
The sludge inlet communication of the sludge outlet of the biochemical treatment unit and the dewaterer, the sludge outlet of the dewaterer and the
The sludge inlet communication of one the pretreatment tank.
3. a kind of pretreatment system of oily waste water according to claim 1, which is characterized in that it further includes sludge condensation
Pond；The sludge outlet of the separate tank respectively with the sludge import of the sludge concentration tank and the last one the pretreatment tank
Sludge inlet communication.
4. a kind of pretreatment system of oily waste water according to claim 2, which is characterized in that it further includes flocculant storage
Tank；The discharge port of the flocculant storage tank is connected to the feed inlet of the dewaterer.
5. a kind of pretreatment system of oily waste water according to claim 1, which is characterized in that it further includes vapour source,
The vapour source is connected to the air inlet of the pretreatment discharge bay.
6. a kind of pretreatment system of oily waste water according to claim 1, which is characterized in that its further include water sealed tank and
Collecting methane unit, the gas outlet of the anaerobic jar are connected to the air inlet of the water sealed tank, the gas outlet of the water sealed tank with
The air inlet of the collecting methane unit is connected to.
7. the oily waste water preprocess method of the pretreatment system using a kind of any oily waste water of claim 1-6,
It is characterized in that, it is the following steps are included: (1) biochemical pretreatment；(2) Anaerobic Treatment；
(1) biochemical pretreatment: the activated sludge of biochemical treatment unit obtains the activity that moisture content is 80% after dehydration
Sludge, then the activated sludge that moisture content is 80% is added to CODcr≤15000mg/L, oil content≤250mg/L, pH 3-
5, in the oily waste water that temperature is 40 DEG C, 12-36h is then stirred in air atmosphere, the precipitation and separation for being then passed through 2-4h obtains
It is 96-99% to CODcr≤15000mg/L, oil content≤20mg/L, pH 5-8, the supernatant that temperature is 25 DEG C and moisture content
Sludge slurry, sludge slurry a part rejoins in oily waste water, and another part is incinerated after dehydration and drying；
(2) Anaerobic Treatment: the supernatant that the biochemical pretreatment of the step (1) obtains is heated to 30-40 DEG C by steam, then
The anaerobic reaction for carrying out 2-4h obtains biogas and CODcr≤1500mg/L, oil content≤20mg/L waste water fermentation, and biogas is received
Collection in waste water fermentation plus is sent to biochemical treatment unit after alkali adjusting pH value to 5-8 and carries out biochemical treatment.
8. a kind of preprocess method of oily waste water according to claim 7, which is characterized in that taken off in the step (1)
The revolving speed of water process is 2500-3000r/min.
9. a kind of preprocess method of oily waste water according to claim 7, which is characterized in that in the step (1)
It is added flocculant during dehydration activated sludge, the mass ratio of flocculant and activated sludge is (1-2): 1000.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112047570A (en) * | 2020-09-03 | 2020-12-08 | 常德鑫芙蓉环保有限公司 | Treatment method of oily industrial wastewater |
| CN116425364A (en) * | 2023-05-15 | 2023-07-14 | 山东凤鸣桓宇环保有限公司 | Oily wastewater recovery treatment system |
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| CN102531291A (en) * | 2012-01-16 | 2012-07-04 | 中海油能源发展股份有限公司天津分公司 | Standard discharge treatment system for rock debris wastewater |
| CN108147625A (en) * | 2018-01-25 | 2018-06-12 | 河北昊源环境工程有限公司 | The preprocess method and pretreatment system of medication chemistry hc effluent |
| CN209537034U (en) * | 2019-01-25 | 2019-10-25 | 内蒙古晶泰环境科技有限责任公司 | A kind of pretreatment system of oily waste water |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101700951A (en) * | 2009-11-20 | 2010-05-05 | 无锡市林信环保工程有限公司 | Emulsified liquid waste water treatment method |
| CN102531291A (en) * | 2012-01-16 | 2012-07-04 | 中海油能源发展股份有限公司天津分公司 | Standard discharge treatment system for rock debris wastewater |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112047570A (en) * | 2020-09-03 | 2020-12-08 | 常德鑫芙蓉环保有限公司 | Treatment method of oily industrial wastewater |
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