CN108975605A - A kind of oiliness sewage treatment sludge reduction process method - Google Patents
A kind of oiliness sewage treatment sludge reduction process method Download PDFInfo
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- CN108975605A CN108975605A CN201810795537.XA CN201810795537A CN108975605A CN 108975605 A CN108975605 A CN 108975605A CN 201810795537 A CN201810795537 A CN 201810795537A CN 108975605 A CN108975605 A CN 108975605A
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- pond
- waste water
- reduction process
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- oily waste
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/043—Treatment of partial or bypass streams
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Activated Sludge Processes (AREA)
Abstract
The invention discloses a kind of oily waste water sludge reduction process, which is suitable for the low-phosphorous high oily wastewater sludge minimizing using cold rolling oil-containing waste water as representative, belongs to environmental technology field.The technique has pretreatment simple, and waste oil mud is not generated when oily waste water CODcr is not higher than 3000mg/L, and effluent quality is high, and CODcr, which stablizes, is less than 30mg/L, and surplus sludge volume yield is small, while also solving the problems, such as that oily waste water MBR processing dirt is stifled.
Description
Technical field
The present invention relates to a kind of oiliness sewage treatment sludge reduction process methods, are particularly suitable for cold rolling oil-containing waste water
For the low-phosphorous high oily wastewater sludge minimizing of representative, belong to environmental technology field.
Background technique
A large amount of excess sludge is produced during cold rolling wastewater biochemical treatment, has been put into subsequent disposal process big
The fund of amount, and soil is occupied, it polluted environment, increase ecological load.It controls from source, is subtracted generating link
Quantization is the specific manifestation for promoting Green Development, low carbon development Ecological Civilization Construction.
Currently, thering is (1) microorganism to grow uncoupling in the main path that biochemical process reduces the yield of sludge；(2) lysis
Technology；(3) microfauna prey is utilized.It is the decomposition generation of microorganism under normal circumstances that microorganism, which grows its dominant mechanism of uncoupling,
It thanks and anabolism by the conversion between ATP (adenosine triphosphate) and ADP (adenosine diphosphate) is coupled together transmission.It will divide
Solution metabolism and anabolism uncoupling, by the release of other approach (such as heat after reducing ATP synthetic quantity or synthesizing ATP
Can) rather than cell synthesis, and reduce cell synthetic quantity and can be reduced sludge quantity.Specific method be increase sludge anoxic,
Sludge uncoupling is realized in the conversion of aerobic environment, is a kind of to put into small, environment and influence small, easily controllable biochemical sludge minimizing
Technique.But microorganism growth uncoupling technique sludge volume is few, and water outlet total phosphorus is high, and sludge age is long, sludge crushing, is not easy to precipitate, out
Water turbidity is high, phosphorous higher waste water is being handled, as being restricted when municipal wastewater.
The present invention is based on uncoupling principles to develop organic loading height, go out according to the characteristic of the low-phosphorous high oil of cold rolling wastewater
The good OSMA sludge reduction process of water water quality realizes low-phosphorous high oily wastewater sludge minimizing.
Summary of the invention
For the characteristic of the low-phosphorous high oil of cold rolling wastewater, the present invention provides a kind of oiliness sewage treatment sludge reduction process
Method, the technique are the technique that a kind of effluent quality for being developed based on A/O, MBR, OSA technique is good, sludge yield is low.
Technique of the present invention adds secondary settling tank between A/O and MBR and the reflux of MBR pond high concentration sludge replaces nitrification liquid to flow back,
So that oxygen in water is changed into anoxic by aerobic, microorganism growth uncoupling is realized, reduces sludge yield to reach
Purpose.
The present invention relates to a kind of oiliness sewage treatment sludge reduction process methods comprising:
(1) pretreatment of oily waste water
The pH value of oily waste water is adjusted to 7.0-7.5 by adding hydrochloric acid, the CODcr for controlling the oily waste water is not high
In 3000mg/L, anoxic pond is introduced after then mixing it with sanitary wastewater；
(2) pretreated oily waste water mixed liquor is introduced into anoxic pond hydrolysis acidification
The oily waste water mixed liquor mixes in anoxic pond with the pond MBR high concentration phegma, uses anoxic pond blender
It is stirred, stirring rate 480-500r/min, residence time 6-7h；
(3) the anoxic pond water outlet flows automatically to aerobic tank removal CODcr, and the content 6- of dissolved oxygen in pond is made by blower
7mg/L, residence time 35-40h；
(4) the aerobic tank water outlet flows automatically to secondary settling tank, adds n water distribution pipe outside the secondary settling tank core barrel,
Middle n is 2-8, and the content 0.1-0.4mg/L of dissolved oxygen in pond is made by adjusting cloth water outside the core barrel, and the residence time is
2-3h；
(5) secondary clarifier effluent enters the pond MBR and further removes CODcr, residence time 4-5h, reflux ratio 280-
320%.
The oiliness sewage treatment sludge reduction process method according to the present invention, wherein in step (1), the pretreatment
The mixing ratio of oily waste water and sanitary wastewater afterwards is about 1:1, obtains oily waste water mixed liquor, CODcr 1900-
2100mg/L。
The oiliness sewage treatment sludge reduction process method according to the present invention, wherein in step (1), if to be processed contain
The initial CODcr of oily waste water is not higher than 3000mg/L, and pretreatment only adjusts pH, do not separate oil, therefore preprocessing process will not produce
Oil generation mud (i.e. danger wastes), realizes dangerous waste minimizing.
The oiliness sewage treatment sludge reduction process method according to the present invention, wherein in step (2), the anoxic pond
Blender uses batch type, and when water inlet, the blender stops operating, and the blender starts turning after stopping water inlet.
When the pond MBR, high concentration phegma is mixed in anoxic pond with oily waste water mixed liquor, the biochemistry in phegma is dirty
Mud is wrapped up by oil in oily waste water mixed liquor, dissolved oxygen rapid decrease, and uncoupling reaction occurs inside the biochemical sludge wrapped up,
Biochemical sludge is resolved, and then has achieved the purpose that sludge reduction.The biology that a large amount of phegmas reduce anoxic pond simultaneously is born
Lotus improves anoxic pond treatment effect.
The oiliness sewage treatment sludge reduction process method according to the present invention, wherein in step (3), aerobic tank is used
Extended aeration technique, using blower, preferably the Lodz blower of Frequency Converter Control, by dissolved oxygen control between 6-7mg/L.
The oiliness sewage treatment sludge reduction process method according to the present invention can also be good wherein in step (3)
Ball-type packing is hung in the middle part of oxygen pond, increases the utilization efficiency that the sludge concentration in biochemistry pool improves oxygen simultaneously.
The oiliness sewage treatment sludge reduction process method according to the present invention, wherein in step (4), by increasing by two
Part water inlet is introduced directly into bottom of pond and rushes base sludge by heavy Chi Jinshuibushuiguandao, guarantees have certain sludge outstanding in pond
Floating amount, while dissolved oxygen content is adjusted to 0.1-0.4mg/L by adjusting cloth water outside core barrel, when spoil disposal, stop water inlet,
Start spoil disposal after sludge kills.In this way, sludge gradually enters anaerobic environment from aerobic environment in sinking watching, to solve
Coupling reaction, sludge are constantly resolved.
The oiliness sewage treatment sludge reduction process method according to the present invention, wherein in step (5), as the MBR
When pond sludge concentration is less than 5g/L, the aerobic tank water part is introduced into the pond MBR by surmounting pipeline；As the MBR
When pond sludge concentration is greater than 8g/L, increase sludge from final clarifier frequency, so that the pond MBR sludge concentration remains at 5-8g/L.This
Sample, the present invention are flowed back using the method for increasing the pond MBR sludge quantity instead of nitrification liquid, so that more microorganisms are in aerobic and anoxic
State transformation.
The process according to the present invention is not more than 3000mg/L situation in oily waste water CODcr to be processed, does not generate
Greasy filth (danger wastes)；In the case where being not added with uncoupling agent, microorganism growth is realized by controlling dissolved oxygen concentration
Uncoupling achievees the purpose that reduce sludge yield.Process effluent quality is high through the invention, and CODcr is by 3000+mg/L
30mg/L is down to hereinafter, reflux ratio rises to 280-320% by 150%, illustrates to maintain in the case where influent COD cr is improved scarce
The dissolved oxygen in oxygen pond and more sludge carry out understanding coupled reaction, realizes sludge reduction, and surplus sludge volume yield is small,
Only the 50% of MBR technique, while also solving the problems, such as that oily waste water MBR processing is dirty stifled.
Detailed description of the invention
Fig. 1 is oiliness sewage treatment sludge reduction process flow chart.
Specific embodiment
In order to better understand the above technical scheme, in conjunction with appended figures and specific embodiments to upper
Technical solution is stated to be described in detail.
Embodiment 1
Oily waste water CODcr is less than 3000mg/L, and the pH value of oily waste water is adjusted to 7 by adding hydrochloric acid, is then made
It is mixed with sanitary wastewater with the ratio of 1:1, obtains oily waste water mixed liquor, then CODcr 1900mg/L introduces anoxic
Pond, preprocessing process do not generate greasy filth, i.e. danger wastes, realize dangerous waste minimizing；The oily waste water mixed liquor with
The pond MBR high concentration phegma mixes in anoxic pond, when stopping water inlet, is stirred using anoxic pond blender, stirs
Rate is 480r/min, and when water inlet, blender stops operating, and residence time 6h, sludge loading is in 0.1kgCOD/kgSS.d
When, water outlet sludge concentration is in 3g/L, and CODcr measured value is in 400mg/L, removal rate 80%；The anoxic pond water outlet gravity flow
COD is removed to aerobic tank, the Ball-type packing that height is 3 meters is hung in the middle part of aerobic gas pond, is made in pond by adjusting rotation speed of fan
The content of dissolved oxygen is 6mg/L, residence time 35h；From aerobic tank water outlet (out sewage sludge CODcr measured value be 40mg/L,
CODcr removal rate is 90%) to flow automatically to secondary settling tank, adds 2 water distribution pipes outside secondary settling tank core barrel, residence time 2h,
Make the content 0.1mg/L of dissolved oxygen in pond by adjusting cloth water outside core barrel；Secondary clarifier effluent enters the pond MBR, at this time MBR
Pond sludge concentration is 3g/L by surmounting pipeline by the aerobic tank water part introducing pond MBR, so that the pond MBR sludge concentration is protected always
It holds in 5g/L, residence time 4h, reflux ratio 280%.Guaranteeing CODcr removal efficiency while containing that MBR membrane pressure difference increases
Trend, MBR be discharged CODcr be 20mg/L, excess sludge removal rate be 60%.
Embodiment 2
Oily waste water CODcr is greater than 3000mg/L, adds hydrochloric acid first for pH value control between 8.0-8.5, further
It adds acid aluminium polychloride and pH value is further adjusted to 7.5, add cationic-type polyacrylamide later, carry out demulsification gas
It is floating, oily waste water CODcr is controlled to 3000mg/L hereinafter, mix it with the ratio of 1:1 with sanitary wastewater, is contained
Then oily waste water mixed liquor, CODcr 2100mg/L introduce anoxic pond；The oily waste water mixed liquor and the pond MBR high concentration
Phegma mixes in anoxic pond, when stopping water inlet, is stirred using anoxic pond blender, stirring rate 500r/
Min, when water inlet, blender stops operating, and residence time 7h, sludge loading is in 0.3kgCOD/kgSS.d, sewage sludge out
Concentration is in 5g/L, and CODcr measured value is in 500mg/L, removal rate 77%；The anoxic pond water outlet flows automatically to aerobic tank removal
COD hangs the Ball-type packing that height is 3 meters in the middle part of aerobic gas pond, the content of dissolved oxygen in pond is made by adjusting rotation speed of fan
For 7mg/L, residence time 40h；From aerobic tank water outlet, (sewage sludge CODcr measured value is 50mg/L out, and CODcr removal rate is
86%) secondary settling tank is flowed automatically to, 8 water distribution pipes are added outside secondary settling tank core barrel, residence time 3h is logical by adjusting center
Outer cloth water makes the content 0.4mg/L of dissolved oxygen in pond；Secondary clarifier effluent enters the pond MBR, and the pond MBR sludge concentration is at this time
10g/L increases sludge from final clarifier frequency, so that the pond MBR sludge concentration remains at 8g/L, residence time 5h, reflux ratio
It is 320%.Guaranteeing CODcr removal efficiency while containing the raised trend of MBR membrane pressure difference, it is 25mg/L that MBR, which is discharged CODcr,
Excess sludge removal rate is 50%.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.Obviously, those skilled in the art can be to the present invention
Carry out various modification and variations without departing from the spirit and scope of the present invention.If in this way, these modifications and changes of the present invention
Within the scope of the claims of the present invention and its equivalent technology, then the present invention is also intended to encompass these modification and variations and exists
It is interior.
Claims (7)
1. a kind of oiliness sewage treatment sludge reduction process method comprising:
(1) pretreatment of oily waste water
The pH value of oily waste water is adjusted to 7.0-7.5 by adding hydrochloric acid, the CODcr for controlling the oily waste water is not higher than
3000mg/L introduces anoxic pond after then mixing it with sanitary wastewater；
(2) pretreated oily waste water mixed liquor is introduced into anoxic pond hydrolysis acidification
The oily waste water mixed liquor mixes in anoxic pond with the pond MBR high concentration phegma, is carried out using anoxic pond blender
Stirring, stirring rate 480-500r/min, residence time 6-7h；
(3) the anoxic pond water outlet flows automatically to aerobic tank removal CODcr, and the content 6-7mg/ of dissolved oxygen in pond is made by blower
L, residence time 35-40h；
(4) the aerobic tank water outlet flows automatically to secondary settling tank, adds n water distribution pipe outside the secondary settling tank core barrel, wherein n is
2-8 makes the content 0.1-0.4mg/L of dissolved oxygen in pond, residence time 2-3h by adjusting cloth water outside the core barrel；
(5) secondary clarifier effluent enters the pond MBR and further removes CODcr, residence time 4-5h, reflux ratio 280-
320%.
2. oiliness sewage treatment sludge reduction process method as described in claim 1, which is characterized in that wherein step (1)
In, the mixing ratio of the pretreated oily waste water and sanitary wastewater is about 1:1, obtains oily waste water mixed liquor, CODcr
For 1900-2100mg/L.
3. oiliness sewage treatment sludge reduction process method as described in claim 1, which is characterized in that wherein step (2)
In, the anoxic pond blender uses batch type, and when water inlet, the blender stops operating, and stops described after intaking stir
Device is mixed to start turning.
4. oiliness sewage treatment sludge reduction process method as described in claim 1, which is characterized in that wherein step (3)
In, Ball-type packing can also be hung in the middle part of aerobic gas pond.
5. oiliness sewage treatment sludge reduction process method as described in claim 1, which is characterized in that wherein step (3)
In, the aerobic tank is controlled dissolved oxygen between 6-7mg/L using blower.
6. oiliness sewage treatment sludge reduction process method as claimed in claim 5, which is characterized in that the blower is preferred
For the Lodz blower of Frequency Converter Control.
7. oiliness sewage treatment sludge reduction process method as described in claim 1, which is characterized in that wherein step (5)
In, when the pond MBR sludge concentration is less than 5g/L, the aerobic tank water part is introduced into the MBR by surmounting pipeline
Pond；When the pond MBR sludge concentration is greater than 8g/L, increase the sludge from final clarifier frequency, so that the pond MBR sludge concentration
Remain at 5-8g/L.
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| CN201810795537.XA CN108975605A (en) | 2018-07-19 | 2018-07-19 | A kind of oiliness sewage treatment sludge reduction process method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114716096A (en) * | 2022-03-28 | 2022-07-08 | 首钢集团有限公司 | Method and system for biochemical reduction of oily sludge in cold rolling wastewater |
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