CN109384352A - A kind of processing method of high concentration baked foods production waste water - Google Patents
A kind of processing method of high concentration baked foods production waste water Download PDFInfo
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- CN109384352A CN109384352A CN201811230568.7A CN201811230568A CN109384352A CN 109384352 A CN109384352 A CN 109384352A CN 201811230568 A CN201811230568 A CN 201811230568A CN 109384352 A CN109384352 A CN 109384352A
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- 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
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- 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
- C02F2103/32—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters
-
- 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
-
- 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
Abstract
The present invention relates to technical field of waste water processing, more particularly to a kind of processing method of high concentration baked foods production waste water, the characteristics of present invention is for baked foods production waste water, use technique for oil removal precipitating-air-dissolving air-float-anaerobic acidification-catalytic oxidation-coagulating sedimentation-disinfection, reduce the structural requirement to structures and relevant device, occupied area is saved, operating cost, energy consumption and service condition are reduced.
Description
Technical field
The present invention relates to technical field of waste water processing, and in particular to a kind of processing side of high concentration baked foods production waste water
Method.
Background technique
Baked foods roast quick-frozen food, such as cattle and sheep meat semi-finished product, Seafood (Fish) semi-finished product, beans semi-finished product,
It is one of the food that the modern life enjoys great popularity, but washes a large amount of waste water of the excretions such as meat workshop and marinated workshop in process of production,
Such waste water has organic concentration height, such as organic compounds containing nitrogen, suspended matter, soluble solid, grease and protein etc.
Content it is more, generally in shallow maroon, the features such as bad smell is larger, wastewater flow rate is few.
Currently, in " slaughterhouse wastewater treatment technology and application are in progress " (Jia Yanping, Jiang Xiuping, Jiang Cheng, Jia Xinqian, Zhang Yuxi
Delivered in 2015) in for slaughtering wastewater be high-content organic wastewater the characteristics of, from activated sludge process, biofilm, anaerobism
Biological treatment, optimum organization technique etc. review the present Research of slaughterhouse wastewater treatment technology, and analyze and compare everywhere
Reason technology advantage and disadvantage, although pointing out that anaerobic-aerobic, anaerobic- anoxic- oxic optimum organization object technique are the hairs of slaughterhouse wastewater treatment
Exhibition trend, but Anaerobic Treatment removal ammonia nitrogen effect is poor, Aerobic Process for Treatment is at high cost, and contact oxidation technology ammonia nitrogen removal frank is compared with it
His technique is high, but comprehensive treatment effect is poor.
The patent No. 201711365560.7 discloses a kind of High-concentration organic wastewater treatment method, for papermaking, leather and
The discharge of the industries such as food proposes a kind of processing mode of high-level oxidation technology in 2000mg/L or more waste water；But utilize peroxide
The higher cost for changing hydrogen processing, is unsuitable for commercial introduction.
For another example the patent No. 201810035472.9 discloses a kind of coupling ceramic membrane absorption electro-catalysis technique to tobacco wastewater
Recycling processing method, main method are efficient air-floating+hydrolysis acidification+ceramic membrane+electrocatalytic oxidation technique, successively main packet
Include grid, conditioning tank, efficient air-floating system, acidification system, ceramic membranous system and electrocatalysis oxidation apparatus.But the ceramic membrane used
Reuse low, operating cost is higher.
For another example patent No. CN201610702965.4 discloses a kind of milk processing factory's wastewater treatment method, including makes waste water
Pass sequentially through flow and water quality adjustment stage, anaerobic hydrolysis-acidification stage, catalytic oxidation stage are handled；Waste water is in anaerobism water
After the dross and precipitating sludge that separated aggregation comes out in solution acidification stage are by cracking processing, then come back to anaerobic acidification rank
Duan Jinhang processing.Dross and precipitating sludge are assembled by scraping slag (mud) machine and are passed through after machinery cracks again in Hydrolysis Acidification
Return to anaerobic acidification phase process；To realize the low-cost processes (reducing by 30% or more cost) of milk processing waste water and organic
The purpose of sludge zero discharge.Treatment method can be by solid suspension, dissolved organic matter and NH4 +Content is respectively 300~
The raw water of 1200mg/L, 1000~5000mg/L and 5~60mg/L pass through 1.5~4 days residence times, reach IV category of water outlet
It is quasi- and do not generate excess sludge, solve in wastewater treatment process that flocculant is at high cost, energy consumption is high for air bearing, and Treatment of Sludge expense is high
The problems such as.But dairy factory emission Poisoning ingredient is less, and roast in waste water containing the toxicity such as nitrite, dioxin at
Point, this makes the factor considered when processing barbecue waste water more.
The above-mentioned slaughtering wastewater main component referred to is blood, grease, meat mincing, bone slag, hair and excrement etc.；Paper waste
Main component is lignin, cellulose, volatile organic acids, alkaline matter, sulfide: the main component of leather waste water is oil
Rouge, collagen, animal and plant fiber, sulfide, chromium, salt；Tobacco wastewater main component is fine suspension, lignin, cigarette
The substances such as alkali, glucide, a small amount of colloid, aromatics；The a large amount of carbohydrates of dairy factory waste water main component, protein, fat, this
It is different with the main component of barbecue waste water, complicated component situation is also different, and those skilled in the art are able to know that high concentration
The ingredient of organic wastewater is different, and the complexity of processing is then different；" Technology of High Concentration OrganicWastewater Treatment is brief talked in document
Progress " aerobic biological treatment, Anaerobic biotreatment method, anaerobic-aerobic are described in (Li Peichang was delivered in 2013)
The characteristics of biological treatment, also indicates that the technology of the treatment of Organic Wastewater of all kinds of high concentrations all has certain limitation, to
It is also relatively difficult to obtain ideal effect.
And currently, mainly having for the treatment process of meat processing waste water, restaurant's waste water, high-concentration organic substance wastewater:
Oxidation/membrane filtration process, multistage multistage A/O technique, coagulation air-float-UASB-SBR coupling technique, air bearing+hydrolysis acidification+CASS
Treatment process, but the structures of these techniques and device structure are complex, manufacturing cost is higher, service condition is just carved, are discharged
Ammonia nitrogen is difficult to up to standard.
Summary of the invention
The present invention is in order to solve the above technical problems, the present invention provides a kind of processing of high concentration baked foods production waste water
Method.
Specifically realized according to following technical scheme:
A kind of processing method of high concentration baked foods production waste water, waste water is successively handled through following steps: oil removal is heavy
Shallow lake, air-dissolving air-float, anaerobic acidification, bio-contact oxidation, coagulating sedimentation, disinfection.
Further, the processing method of the high concentration baked foods production waste water, comprising the following steps:
S1 filtering: waste water is according to 20m3The flow of/d successively through coarse rack, fine fack, removes the bulky grain solid in waste water
Object；
S2 oil removal precipitating: the waste water after S1 step process is successively handled through oil removal settling system, 6~8h of hydraulic retention,
It degreases, silt；
S3 air-dissolving air-float: the waste water feeding air-dissolving air-float system after S2 step process is handled to the water surface and is no longer occurred
Dross, through being separated by solid-liquid separation；
S4 anaerobic acidification: the waste water after S3 step process being promoted through pump and is sent into anaerobic acidification pond, carries out anaerobic hydrolysis acid
Change processing 20~for 24 hours；
S5 bio-contact oxidation: the waste water after S4 step process is sent into biological contact oxidation pond, through bio-contact oxidation
Processing 20~for 24 hours；
S6 coagulating sedimentation: sending the waste water after S5 step process into flocculation sedimentation tank, and after adding flocculant to react, separation is heavy
It forms sediment；
S7 disinfection: the waste water after S6 step process is sent into sterilization pool, adds disinfectant to handle 0.3~0.5h, can discharge.
In the above method, coarse rack preferred size is 12mm, and fine fack preferred size is 5mm.
In the above method, the air-flotation system by flotation tank, dissolved air water pump, air compressor machine, dissolving, air bearing release, scrape
Slag machine composition.
Further, the air-dissolving air-float is handled using ultra tiny uniform bubble.
In the above method, gained dross is handled through air-flotation system in the present invention and enters sludge concentration tank through Slag Scraping Device blowdown, is subtracted
The amount of pollutant for entering anaerobic acidification pond less, reduces biological load.
This method carries out air-flotation process to the waste water for entering anaerobic acidification pond using ultra tiny uniform bubble air-dissolving air-float, makes
It obtains the waste water suspended particulate into anaerobic acidification pond to reduce, is conducive to subsequent biochemical treatment.
In the above method, the anaerobic acidification uses steel construction, designs pond body diameter 3.0m, available depth 4.7m, effectively
Volume 20m3；Preferably, the time of the anaerobic acidification is for 24 hours.
The present invention, to making the larger molecular organics in waste water be degraded to small organic molecule, makes to be not easy using anaerobic acidification pond
The organic matter of dissolution becomes feasible to the organic matter of dissolution.
In the above method, the bio-contact oxidation, operating condition contact-oxidation pool total measurement (volume) 20m3, average hydraulic stops
Staying the time is for 24 hours.
Anaerobic acidification and catalytic oxidation are applied in combination the present invention, small molecule after making anaerobic acidification and diffluent organic
Object is utilized by aerobe, denitration denitrogenation dephosphorization.
Contain hydroformylation polyvinyl silk filler in biological contact oxidation pond of the present invention；It is capable of increasing biological area,
So that activated sludge is adhered to filler surface, stirring of the biomembrane by ascending air improves clean-up effect；And also make
Contact-oxidation pool have short processing time, small in size, good purification, effluent quality it is good and stablize, sludge is not required to flow back also not
Expansion, the advantages that power consumption is small, so that the harmful substances such as ammonia nitrogen, nitrous acid, nitrate, hydrogen sulfide are sufficiently removed.
The present invention arranges coagulative precipitation tank behind anaerobic acidification pond and contact-oxidation pool, when unintended emergency occurs for biosystem
When discharge, flocculant, which is added, makes the suspended matter coagulating sedimentation in water get off, and guarantees the quality of water outlet.
The disinfectant is chlorine dioxide；Coliform can effectively be killed.
This law clearly uses technique for oil removal precipitating-air-dissolving air-float-anaerobic acidification-catalytic oxidation-coagulating sedimentation-dioxy surely
Change chlorination, the matched structures of institute and equipment have: sewage pump, oil partiting precipitation pool, flotation tank, dissolved air water pump, pneumatics
Machine, dissolving, air bearing release, Slag Scraping Device, sludge concentration tank, flotation tank waste water pump, anaerobic acidification pond, bio-contact oxidation
Pond, flocculation sedimentation tank, sterilization pool.
Anaerobic acidification pond of the present invention, pond body diameter 3.0m, available depth 4.7m, dischargeable capacity is due to water
It is fixed；Its main function is: being dissolved organic matter by insoluble hydrolysis of organic matter, the macromolecular substances of difficult for biological degradation are turned
The process of the small-molecule substance of easily biological-degradable is turned to, so as to improve the biodegradability of waste water, establishes good base for subsequent processing
Plinth.
The beneficial effects of the present invention are:
The characteristics of present invention is for baked foods production waste water, uses technique for oil removal precipitating-air-dissolving air-float-anaerobism acid
Change-catalytic oxidation-coagulating sedimentation-disinfection by chlorine dioxide, reduces the structural requirement to structures and relevant device, saves and account for
Ground area reduces operating cost, energy consumption and service condition.
Waste water is produced using present invention process processing baked foods, water outlet ammonia nitrogen is up to standard, and water outlet meets GB13547-92 " meat
Class processing industry water pollution discharge standard " (meat products processing) secondary discharge standard: its biochemistry of waste water processed by the invention refers to
It marks as follows:
1) pH is 6.0~8.5, reaches GB13547-92 " meat-packing industry water pollution discharge standard " (meat products processing)
Secondary discharge standard.
2) CODCr content≤120mg/L reaches GB13547-92 " meat-packing industry water pollution discharge standard " (meat system
Product processing) secondary discharge standard.
3)BOD5Content≤50mg/L reaches GB13547-92 " meat-packing industry water pollution discharge standard " (meat products
Processing) secondary discharge standard.
4) SS content≤100mg/L, reaching GB13547-92 " meat-packing industry water pollution discharge standard ", (meat products adds
Work) secondary discharge standard.
5) NH3-N content≤20mg/L reaches GB13547-92 " meat-packing industry water pollution discharge standard " (meat products
Processing) secondary discharge standard.
6) vegetable and animals oils content≤20mg/L reaches GB13547-92 " meat-packing industry water pollution discharge standard " (meat
Product processing) secondary discharge standard.
7) excrement colibacillus group content≤10000mg/L reaches GB13547-92 " meat-packing industry water pollution discharge mark
It is quasi- " (meat products processing) secondary discharge standard.
In addition, the present invention has short processing time, nitrite, polyamines content can be effectively reduced, and green
Colour circle is protected.
Specific embodiment
Specific embodiments of the present invention will be described in further detail below, but the invention is not limited to these realities
Mode is applied, it is claimed to still fall within the claims in the present invention for any improvement or replacement on the present embodiment essence spirit
Range.
Embodiment 1
20m3/ d high concentration baked foods production wastewater treatment process
Water quality indicator before handling:
PH:6~7；CODCr:2200mg/L；BOD5: 1200mg/L；SS:1000mg/L；NH3-N:120mg/L: animals and plants
Oil: 200mg/L；
Treatment process:
S1 filtering: waste water is according to 20m3The flow of/d successively through coarse rack (12mm), fine fack (5mm), removes in waste water
Bulky grain solid content；
S2 oil removal precipitating: by the waste water after S1 step process successively through oil removal settling system, hydraulic retention 8h processing, removal
Greasy dirt, silt；
S3 air-dissolving air-float: the waste water feeding air-dissolving air-float system after S2 step process is handled to the water surface and is no longer occurred
Dross, through being separated by solid-liquid separation；
S4 anaerobic acidification: the waste water after S3 step process being promoted through pump and is sent into anaerobic acidification pond, carries out anaerobic hydrolysis acid
Change is handled for 24 hours；
S5 bio-contact oxidation: the waste water after S4 step process is sent into biological contact oxidation pond, through bio-contact oxidation
Processing is for 24 hours；
S6 coagulating sedimentation: sending the waste water after S5 step process into flocculation sedimentation tank, and after adding flocculant to react, separation is heavy
It forms sediment；
S7 disinfection: the waste water after S6 step process is sent into sterilization pool, adds disinfectant to handle 0.5h, can discharge；
The air-flotation system is made of flotation tank, dissolved air water pump, air compressor machine, dissolving, air bearing release, Slag Scraping Device.
Gained dross is handled through air-flotation system in the present invention and enters sludge concentration tank through Slag Scraping Device blowdown, is reduced and is entered anaerobism acid
Change the amount of pollutant in pond, reduces biological load.
The anaerobic acidification, operating condition anaerobic acidification pond proposed adoption steel construction design pond body diameter 3.0m, effective water
Deep 4.7m, dischargeable capacity 20m3, the residence time is about for 24 hours.
The bio-contact oxidation, operating condition contact-oxidation pool total measurement (volume) 20m3, mean hydraulic residence time is
24h。
Contain hydroformylation polyvinyl silk filler in biological contact oxidation pond of the present invention；It is capable of increasing biological area,
So that activated sludge is adhered to filler surface, stirring of the biomembrane by ascending air improves clean-up effect；And also make
Contact-oxidation pool have short processing time, small in size, good purification, effluent quality it is good and stablize, sludge is not required to flow back also not
Expansion, the advantages that power consumption is small, so that the harmful substances such as ammonia nitrogen, nitrous acid, nitrate, hydrogen sulfide are sufficiently removed.
The disinfectant is chlorine dioxide；Coliform can effectively be killed.
This law clearly uses technique for oil removal precipitating-air-dissolving air-float-anaerobic acidification-catalytic oxidation-coagulating sedimentation-dioxy surely
Change chlorination, the matched structures of institute and equipment have: sewage pump, oil partiting precipitation pool, flotation tank, dissolved air water pump, pneumatics
Machine, dissolving, air bearing release, Slag Scraping Device, sludge concentration tank, flotation tank waste water pump, anaerobic acidification pond, bio-contact oxidation
Pond, flocculation sedimentation tank, sterilization pool.
Anaerobic acidification pond of the present invention, pond body diameter 3.0m, available depth 4.7m, dischargeable capacity is due to water
It is fixed；Its main function is: being dissolved organic matter by insoluble hydrolysis of organic matter, the macromolecular substances of difficult for biological degradation are turned
The process of the small-molecule substance of easily biological-degradable is turned to, so as to improve the biodegradability of waste water, establishes good base for subsequent processing
Plinth.
Water quality indicator after processing:
PH:6.5~6.7；CODCr:80mg/L；BOD5: 40mg/L；SS:75mg/L；NH3-N:6mg/L: vegetable and animals oils:
20mg/L；Excrement colibacillus group: 9800mg/L.
Embodiment 2
100m3/ d high concentration baked foods production wastewater treatment process
Water quality indicator before handling:
PH:6~7；CODCr:2500mg/L；BOD5: 1400mg/L；SS:1200mg/L；NH3-N:130mg/L: animals and plants
Oil: 230mg/L；
Treatment process:
S1 filtering: waste water is according to 20m3The flow of/d successively through coarse rack (12mm), fine fack (5mm), removes in waste water
Bulky grain solid content；
S2 oil removal precipitating: by the waste water after S1 step process successively through oil removal settling system, hydraulic retention 8h processing, removal
Greasy dirt, silt；
S3 air-dissolving air-float: the waste water feeding air-dissolving air-float system after S2 step process is handled to the water surface and is no longer occurred
Dross, through being separated by solid-liquid separation；
S4 anaerobic acidification: the waste water after S3 step process being promoted through pump and is sent into anaerobic acidification pond, carries out anaerobic hydrolysis acid
Change processing 20h；
S5 bio-contact oxidation: the waste water after S4 step process is sent into biological contact oxidation pond, through bio-contact oxidation
Handle 20h；
S6 coagulating sedimentation: sending the waste water after S5 step process into flocculation sedimentation tank, and after adding flocculant to react, separation is heavy
It forms sediment；
S7 disinfection: the waste water after S6 step process is sent into sterilization pool, adds disinfectant to handle 0.3h, can discharge；
The oil removal system
The air-flotation system is made of flotation tank, dissolved air water pump, air compressor machine, dissolving, air bearing release, Slag Scraping Device.
Gained dross is handled through air-flotation system in the present invention and enters sludge concentration tank through Slag Scraping Device blowdown, is reduced and is entered anaerobism acid
Change the amount of pollutant in pond, reduces biological load.
The anaerobic acidification, operating condition anaerobic acidification pond proposed adoption steel construction design pond body diameter 3.0m, effective water
Deep 4.7m, dischargeable capacity 20m3, the residence time is about for 24 hours.
The bio-contact oxidation, operating condition contact-oxidation pool total measurement (volume) 20m3, mean hydraulic residence time is
24h。
Contain hydroformylation polyvinyl silk filler in biological contact oxidation pond of the present invention；It is capable of increasing biological area,
So that activated sludge is adhered to filler surface, stirring of the biomembrane by ascending air improves clean-up effect；And also make
Contact-oxidation pool have short processing time, small in size, good purification, effluent quality it is good and stablize, sludge is not required to flow back also not
Expansion, the advantages that power consumption is small, so that the harmful substances such as ammonia nitrogen, nitrous acid, nitrate, hydrogen sulfide are sufficiently removed.
The disinfectant is chlorine dioxide；Coliform can effectively be killed.
This law clearly uses technique for oil removal precipitating-air-dissolving air-float-anaerobic acidification-catalytic oxidation-coagulating sedimentation-dioxy surely
Change chlorination, the matched structures of institute and equipment have: sewage pump, oil partiting precipitation pool, flotation tank, dissolved air water pump, pneumatics
Machine, dissolving, air bearing release, Slag Scraping Device, sludge concentration tank, flotation tank waste water pump, anaerobic acidification pond, bio-contact oxidation
Pond, flocculation sedimentation tank, sterilization pool.
Anaerobic acidification pond of the present invention, pond body diameter 3.0m, available depth 4.7m, dischargeable capacity is due to water
It is fixed；Its main function is: being dissolved organic matter by insoluble hydrolysis of organic matter, the macromolecular substances of difficult for biological degradation are turned
The process of the small-molecule substance of easily biological-degradable is turned to, so as to improve the biodegradability of waste water, establishes good base for subsequent processing
Plinth.
Water quality indicator after processing:
PH:6.5~7.0；CODCr:90mg/L；BOD5: 45mg/L；SS:80mg/L；NH3-N:12mg/L: vegetable and animals oils:
18mg/L；Excrement colibacillus group: 10000mg/L.
Comparative example 1
20m3/ d high concentration baked foods production wastewater treatment process
Water quality indicator before handling:
PH:6~7；CODCr:2200mg/L；BOD5: 1200mg/L；SS:1000mg/L；NH3-N:120mg/L: animals and plants
Oil: 200mg/L；
Treatment process:
S1 filtering: waste water is according to 20m3The flow of/d successively through coarse rack (12mm), fine fack (5mm), removes in waste water
Bulky grain solid content；
S2 oil removal precipitating: by the waste water after S1 step process successively through oil removal settling system, hydraulic retention 8h processing, removal
Greasy dirt, silt；
S3 air-dissolving air-float: the waste water feeding air-dissolving air-float system after S2 step process is handled to the water surface and is no longer occurred
Dross, through being separated by solid-liquid separation；
S4 anaerobic acidification: the waste water after S3 step process being promoted through pump and is sent into anaerobic acidification pond, carries out anaerobic hydrolysis acid
Change processing 20h；
S5 bio-contact oxidation: the waste water after S4 step process is sent into biological contact oxidation pond, through bio-contact oxidation
Handle 20h；
S6CASS processing, precipitation and separation；
S7 disinfection: the waste water after S6 step process is sent into sterilization pool, adds disinfectant to handle 0.3h, can discharge；
Water quality indicator after processing:
PH:6.2~6.8；CODCr:200mg/L；BOD5: 60mg/L；SS:150mg/L；NH3-N:40mg/L: animals and plants
Oil: 50mg/L；Excrement colibacillus group: 12000mg/L.
Comparative example 2
20m3/ d high concentration baked foods production wastewater treatment process
Water quality indicator before handling:
PH:6~7；CODCr:2200mg/L；BOD5: 1200mg/L；SS:1000mg/L；NH3-N:120mg/L: animals and plants
Oil: 200mg/L；
S1 pretreatment: after the filter pocket initial filter that barbecue waste water is first used to 150 mesh, then pass through the filter refined filtration of 250 mesh；Due to
It roasts and contains a large amount of auxiliary material clasts and suspended solid in waste water, so must first be pre-processed, i.e., using the side of initial filter, refined filtration
Formula carries out primary filtration to pickling waste water；
S2 flocculation: barbecue waste water being placed in vessel, is located on magnetic stirring apparatus, and it is 7 that calcium hydroxide, which is added, and adjusts pH value,
Successively add 90mg/L flocculant, 60mg/L polypropylene phthalein amine is uniformly mixed be placed on 40 DEG C under the conditions of quickly stir 3min, then
Moderate-speed mixer 30s takes supernatant after standing 30min；Wherein, roast waste water, flocculant, polypropylene phthalein amine mass ratio be 50:
1:1；
Preferably, flocculant is polyaluminum ferric chloride (PAFC)；Polyaluminum ferric chloride is a kind of novel ferro-aluminum composite inorganic
Flocculant has the characteristic of molysite, aluminum salt concurrently, and reaction speed is fast, forms floccule body is big, sedimentation is fast, filterability is strong etc., especially
Its decoloration, removal COD and in terms of there are unique features, and water sample remnants aluminum concentration is high, heavy after overcoming aluminium salt processing
The deficiencies of reduction of speed degree is slow.Flocculation aid polypropylene phthalein amine is a kind of organic high molecular polymer, has adsorption bridging work to water-borne glue grain
With high polymer coagulant can be strengthened to the sweeping across of water-borne glue grain, package action by being used in mixed way with flocculant；
S3 micro-filtration, ultrafiltration: it is 0.24 ㎡ that above-mentioned supernatant, which is passed through membrane area, and aperture is at the ceramic micro filter film of 100nm
Molecular cut off is used 0.2-1.0 μm of filter sizes, to obtain filtrate for ultrafiltration membrane 2-4h of ultrafiltration of 2000Da1 after managing 1h；Its
In, microfiltration membranes feed flow rate is 2.0m/s, system pressure 0.12MPa, pH 8；Ultrafiltration membrane feed flow rate is 0.14m/s, is
System pressure is 1.2MPa；When operation, clean agranular feed liquid to be separated is placed in circulating tank, the drive of systems pumps is passed through
It is dynamic, so that feed liquid is flowed through film unit with certain flow and pressure, to realize the composition separation of feed liquid.After micro-filtration film process, burn
Roasting waste water can generally reach national secondary discharge standard；
S4 high-temperature sterilization: by obtained concentrate carry out high-temperature sterilization, 130 DEG C of temperature, sterilization time 20s.
Water quality indicator after processing:
PH:6.2~6.8；CODCr:120mg/L；BOD5: 50mg/L；SS:100mg/L；NH3-N:20mg/L: animals and plants
Oil: 20mg/L；Excrement colibacillus group: 10000mg/L.
Test example 1
Fresh white radishes are impregnated using by the processed barbecue waste water of embodiment 1-2, comparative example 1-2, while with ultrapure water
Impregnating fresh white radishes is blank example, detects its content of beary metal, nitrite situation of change, and comment dish base sense organ
Valence, as a result as shown in Table 1 and Table 2；
Testing index and method: the measurement of nitrite: by GB/T 5009.33 " nitrite in food and nitrate
Measurement " as defined in method；
Table 1: heavy metal and content of nitrite detection
| Lead (Pb) | Arsenic (As) | Nitrite | Nitrate | Nitrosamine | |
| Embodiment 1 | 0.006mg/L | 0.01mg/L | It is not detected | 1000mg/kg | It is not detected |
| Embodiment 2 | 0.005mg/L | 0.011mg/L | It is not detected | 1200mg/kg | It is not detected |
| Comparative example 1 | 0.008mg/L | 0.015mg/L | It is not detected | 5300mg/kg | 80mg/kg |
| Comparative example 2 | 0.013mg/L | 0.013mg/L | 120mg/kg | 4800mg/kg | It is not detected |
| Blank example | 0.001mg/L | 0.002mg/L | It is not detected | 300mg/kg | It is not detected |
The evaluation of quality sense organ: forming evaluation group by 10 professionals, to different water impregnate fresh white radishes into
Row color, brittleness are evaluated；
Table 2: quality sense organ variation
| Color | Brittleness | |
| Embodiment 1 | White | Quality is tender and crisp |
| Embodiment 2 | Micro- Huang | Quality is tender and crisp |
| Comparative example 1 | It is faint yellow | Quality is tender and crisp |
| Comparative example 2 | Yellow | Quality is softer |
| Blank example | White | Quality is tender and crisp |
Claims (7)
1. a kind of processing method of high concentration baked foods production waste water, which is characterized in that by waste water successively through following steps at
Reason: oil removal precipitating, air-dissolving air-float, anaerobic acidification, bio-contact oxidation, coagulating sedimentation, disinfection.
2. the processing method of high concentration baked foods production waste water as described in claim 1, which is characterized in that the high concentration
The processing method of baked foods production waste water, comprising the following steps:
S1 filtering: waste water is according to 20m3The flow of/d successively through coarse rack, fine fack, removes the bulky grain solid content in waste water；
S2 oil removal precipitating: by the waste water after S1 step process successively through oil removal settling system, 6~8h of hydraulic retention processing, removal
Greasy dirt, silt；
S3 air-dissolving air-float: the waste water feeding air-dissolving air-float system after S2 step process is handled to the water surface and is no longer floated
Slag, through being separated by solid-liquid separation；
S4 anaerobic acidification: the waste water after S3 step process being promoted through pump and is sent into anaerobic acidification pond, is carried out at anaerobic hydrolysis-acidification
Reason 20~for 24 hours；
S5 bio-contact oxidation: the waste water after S4 step process is sent into biological contact oxidation pond, through biological contact oxidization treatment
20~for 24 hours；
S6 coagulating sedimentation: sending the waste water after S5 step process into flocculation sedimentation tank, after adding flocculant to react, precipitation and separation；
S7 disinfection: the waste water after S6 step process is sent into sterilization pool, adds disinfectant to handle 0.3~0.5h, can discharge.
3. the processing method of high concentration baked foods production waste water as described in claim 1, which is characterized in that the air bearing system
System is made of flotation tank, dissolved air water pump, air compressor machine, dissolving, air bearing release, Slag Scraping Device.
4. the processing method of high concentration baked foods production waste water as described in claim 1, which is characterized in that the molten gas gas
It is floating to be handled using ultra tiny uniform bubble.
5. the processing method of high concentration baked foods production waste water as described in claim 1, which is characterized in that the anaerobism acid
Change and use steel construction, designs pond body diameter 3.0m, available depth 4.7m, dischargeable capacity 20m3。
6. the processing method of high concentration baked foods production waste water as described in claim 1, which is characterized in that the anaerobism acid
The time of change is for 24 hours.
7. the processing method of high concentration baked foods production waste water as described in claim 1, which is characterized in that the biology connects
The contact-oxidation pool total measurement (volume) of touching oxidation is 20m3, mean hydraulic residence time 20-24h.
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