CN106746175A - A kind of kitchen garbage, waste-water processing method - Google Patents
A kind of kitchen garbage, waste-water processing method Download PDFInfo
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- CN106746175A CN106746175A CN201611020739.4A CN201611020739A CN106746175A CN 106746175 A CN106746175 A CN 106746175A CN 201611020739 A CN201611020739 A CN 201611020739A CN 106746175 A CN106746175 A CN 106746175A
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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
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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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
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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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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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
- C02F2001/007—Processes including a sedimentation step
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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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
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
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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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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Abstract
A kind of kitchen garbage, waste-water processing method, waste water and kitchen garbage after being dehydrated for kitchen garbage slurry anaerobic fermentation process the wastewater produced processing method of other operations.After waste water elder generation through being sunk at the beginning of oil removal, water quantity and quality regulation, pH value regulation for the first time, the free ammonia aeration of Ammonia blowing-out tower, second regulation of pH value, A/O biochemical treatments, precipitation process, ozone contact reaction, aeration and biological treatment, disinfect, COD, BOD in removal waste water5, the pollutant such as SS while, can effectively remove TN, TP and effectively reduce chroma in waste water, and improve TN, TP clearance, COD, BOD in the waste water after treatment5、TN、NH3The pollutants such as N, TP, colourity can be stably reached《Integrated wastewater discharge standard》(GB8978 1996) " grade III Standard " and《Sewage enters town sewer water standard》The requirement of GB/T 31,962 2015) " B grades ".
Description
Technical field
The present invention relates to a kind of kitchen garbage, waste-water processing method, and in particular to a kind of for kitchen garbage slurry anaerobism hair
Waste water and kitchen garbage after ferment dehydration process the wastewater produced processing method of other operations, belong to sewage treatment area.
Background technology
Waste water after the dehydration of kitchen garbage slurry anaerobic fermentation, and kitchen garbage processes the waste water of other operations generation,
Waste component is complicated, the big high concentrated organic wastewater of category intractability.Pollutants in Wastewater concentration is high, COD (COD,
8000~20000mg/L), biochemical oxygen demand (BOD) (BOD5, 4000~8000mg/L), total nitrogen (TN, 2000~3000mg/L), ammonia nitrogen
(NH3- N, 1500~2500mg/L), total phosphorus (TP, 50~150mg/L), suspension (SS,>8000mg/L), salt content (15000
~30000mg/L), vegetable and animals oils (800~1500mg/L), colourity (300~1000 times).Cellulose, protein in waste water,
The refractory organic such as lipid matter institute accounting is big, its carbon-nitrogen ratio (BOD5:TKN it is) low, only 2:1~3:1, the carbon nitrogen of waste water
Than the low effective removal for being unfavorable for total nitrogen.
Kitchen waste water treatment it is main at present using anaerobic bio-treated, Aerobic biological process and membrane technology treatment etc. it is several or
The process route of kinds of processes unit combination.Should be reached after kitchen waste water treatment《Integrated wastewater discharge standard (GB8978-
1996)》In it is " grade III Standard " and more strict《Sewage enters town sewer water standard》GB/T 31962-2015)
In " B grades " standard.
Have in the prior art a kind of entitled " processing method of secondary wastewater of kitchen waste ", the method is " to pre-process+detest
Oxygen+aerobic+flocculation sediment " group technology, its deficiency is that one is that anaerobic treatment process unit operational management requirement is high, especially
Carbon source in Anaerobic Treatment process consumption waste water, carbon-nitrogen ratio further declines (COD, BOD in making waste water5Reduce, ammonia nitrogen is raised),
The reduction of carbon-nitrogen ratio is less useful for the biological denitrificaion of waste water；Two is that ammonia nitrogen in waste water mainly occurs nitration reaction in aerobic stage
And nitrate nitrogen and nitrite nitrogen are converted into, due to carbon-nitrogen ratio (BOD5:TKN) dropped again in the state of relatively low originally
It is low, cause carbon source to lack, because without sufficient carbon source, it is impossible to complete denitrification denitrogenation, then total nitrogen fails effectively degraded and removal, always
Nitrogen removal efficiency is low, it is difficult to reach《Sewage enters town sewer water standard》GB/T 31962-2015) in " B grades " standard
It is required that.
There is a kind of entitled " method of kitchen garbage, waste-water treatment " in the prior art, its step includes：First through pre- place
Reason, solid impurity, oil, dope in removal waste water etc., then respectively through anaerobic organism membrane reactor, aerobe film reaction
Device is acidified and removes to wastewater through organic matter, is most discharged after reverse osmosis membrane processing afterwards；The method for " pretreatment+anaerobism+aerobic+
Advanced treating (reverse osmosis membrane filtration) " group technology, its deficiency is that one is the anaerobic treatment process unit in the method, and upper
State the anaerobic treatment process unit in " processing method of secondary wastewater of kitchen waste " there is a problem of it is same；Two is the method institute
The reverse osmosis membrane processing technology of use, although can meet《Sewage enters town sewer water standard》" B grades " standard will
Ask, its defect is：Grease in waste water is easily caused film blocking, and the high salt branch in waste water accelerates aging, the use longevity of film of film
Life is short, and especially membrane technology is a kind of physical filtering technology, is simply retained the pollutant in waste water, will not pollution
Thing is really degraded, and produced a large amount of concentrates need to separately carry out the treatment of complex process, is easily caused secondary pollution, and operation
It is relatively costly.
The content of the invention
In view of the shortcomings of the prior art, the present invention provides a kind of kitchen garbage, waste-water processing method, i.e. kitchen garbage slurry
Waste water and kitchen garbage after anaerobic fermentation dehydration process the wastewater produced processing method of other operations, and this method has in satisfaction
COD, BOD in effect removal waste water5, the pollutant such as SS while, can effectively remove TN, TP and effectively reduce chroma in waste water, and carry
The clearance of TN, TP high, COD, BOD in the waste water after treatment5、TN、NH3The pollutants such as-N, TP, colourity can be stably reached《It is dirty
Water comprehensive discharge standard》(GB8978-1996) " grade III Standard " and《Sewage enters town sewer water standard》GB/T
31962-2015) the requirement of " B grades ".
The process step of the invention is as follows：
A, waste water are initially entered to be sunk at the beginning of oil removal preliminary sedimentation tank carries out oil removal and processed, and exclude the oil slick in waste water, big in waste water
Granule foreign and bulky grain suspension are deposited in oil removal preliminary sedimentation tank bottom of pond under gravity, the sludge row produced by precipitation
Enter mud storage pool, removal most suspended substances SS；Waste water after being processed through oil removal preliminary sedimentation tank enters regulating reservoir, water to waste water,
Water quality is adjusted, and is beneficial to the stable operation of subsequent treatment operation；
Waste water after b, the treatment of adjusted pond enters a pH regulating reservoirs, adds alkali (NaOH) and is stirred mixing, right
The pH value of waste water carries out first time regulation, makes the form of ammonia nitrogen in waste water by NH4 +It is converted into free ammonia (NH3), it is that follow-up ammonia blows
Effective removal ammonia nitrogen of de- process provides advantage；
C, processed through a pH regulating reservoirs after waste water enter Ammonia blowing-out tower inner chamber top, and by Ammonia blowing-out tower intracavity bottom
Air is blown up, gas liquid ratio is 2500~3500:1, waste water lands from top to bottom, and the air-flow of rising is abundant with the waste water for falling
Contact, by liquid --- gas mass transport process, free ammonia then switchs to gas phase and turns into ammonia-containing exhaust and discharge by liquid phase, realizes free
The stripping of ammonia and removal, make the carbon-nitrogen ratio (BOD in waste water5:TKN 4) are promoted to:1~6:1, for follow-up biological denitrificaion is provided
Suitable carbon-nitrogen ratio condition, is beneficial to follow-up biological denitrificaion treatment effect；
D, through Ammonia blowing-out tower process after waste water enter the 2nd pH regulating reservoirs, add sulfuric acid (H2SO4) and be stirred mixed
Close, second regulation is carried out to pH value of waste water, form the suitable growing environment of microorganism, for subsequent biochemical treatment provides necessary ring
Border；
E, processed through second pH regulating reservoir after waste water carry out biochemical treatment into A/O biochemical treatment apparatus, effectively go
Except most COD, BOD5, further remove NH3- N, TN, effectively remove TP；
F, precipitation process is carried out into sedimentation basin through the waste water after A/O biochemical treatments, realize mud-water separation, further removal
SS, while carrying out chemical dephosphorization to aluminium salt or molysite is added in sedimentation basin, further removes the TP in waste water；
G, enter ozone reactor through the waste water (supernatant in sedimentation basin) after precipitation process, carry out contacting anti-with ozone
Should, the organic pollutant of the difficult for biological degradation in waste water is oxidized under the strong oxidation of ozone, and macromolecular is changed into small point
Son, it is easy to biochemical degradation, the biodegradability of waste water is improved, and is that follow-up BAF biochemical treatment creates conditions；Simultaneously
Partial organic substances are inorganic matter by exhaustive oxidation, further reduce COD, BOD in waste water5, the coloured groups in waste water are broken
Bad, the colourity of waste water is effectively reduced；
H, processed through ozone reactor after waste water into carrying out biological treatment, waste water and microorganism in BAF
Film is fully contacted, and the organic matter in degrading waste water simultaneously carries out nitration denitrification denitrogenation, further eliminate COD in waste water,
BOD5、TN、NH3- N, while the filtering function of BAF realizes the removal to remaining SS；
I, through BAF process after waste water enter sterilization pool, sterile-processed rear qualified discharge；
Sludge in j, the mud storage pool is separately disposed after being processed through device for dehydrating sladge waste.
Compared with the prior art, the invention has the characteristics that and technique effect：
1st, a kind of new processing unit is combined as using " first time pH value regulation+ammonia aeration " in the present invention, in a pH
PH value in regulating reservoir to waste water carries out first time regulation, makes the form of ammonia nitrogen in waste water from NH4 +It is converted into free ammonia (NH3),
For the free ammonia that follow-up ammonia aeration processing procedure is effectively removed in waste water provides favourable technical conditions, in ammonia aeration treatment
By liquid --- gas mass transport process, inverted free ammonia then switchs to gas phase and turns into ammonia-containing exhaust and discharge by liquid phase, so that
Effective removal of the ammonia aeration processing procedure to free ammonia is realized, to realize effectively removal TN, NH3- N and raising TN, NH3- N is removed
The purpose of rate establishes good basis.
2nd, described " pH value of ammonia aeration+second regulation+A/O biochemical treatments " is formed into another innovation form in the present invention
Processing unit, because the ammonia aeration processing procedure is effectively removed the free ammonia in waste water, effectively improve waste water
In carbon-nitrogen ratio so that for follow-up biological denitrificaion provides suitable carbon-nitrogen ratio condition, the waste water after ammonia aeration treatment enters
PH value in 2nd pH regulating reservoirs to waste water carries out second regulation, and the suitable growing environment of microorganism is formd again；
Due to processing for the biological denitrificaion of A/O biochemical treatment apparatus provides suitable carbon-nitrogen ratio condition, together for Ammonia blowing-out tower
When second regulation is carried out to the pH value of waste water and the suitable growing environment of microorganism is formd, in A/O biochemical treatment apparatus pair
During waste water carries out biochemical treatment, the microorganism in the aerobic zone of A/O biochemical treatment apparatus in activated sludge can be effectively
Metabolism is carried out, by COD, BOD in waste water5Degraded, while the ammonium oxidation in waste water is by the nitrifier in activated sludge
Nitrate nitrogen and cultured water, because ammonia aeration processing procedure effectively increases the carbon-nitrogen ratio in waste water, the carbon source in waste water is rich
Richness, the denitrifying bacterium in A/O biochemical treatment apparatus anoxic zone consumes carbon source COD, BOD in waste water is removed5While, by nitric acid
Salt nitrogen and cultured water are converted into nitrogen, by nitrification-denitrification reaction, realize effective denitrogenation；Meanwhile, in activated sludge
Microorganism (polyP bacteria) absorbs phosphorus in metabolic processes, forms Quadrafos and is stored in the internal of polyP bacteria, effectively removal
Phosphorus in waste water；
3rd, precipitation process follow-up in the present invention, ozone reaction, the biological treatment of BAF and foregoing treatment
Technique unit constitutes overall new departure that the present invention is processed waste water, obtains corresponding effective in aforementioned processing technique unit
Treatment effect on the basis of, in the sedimentation treatment step of sedimentation basin, further eliminate the SS and TP in waste water；In ozone
In the ozone reaction step of reactor, COD, the BOD in waste water are reduce further5With the colourity for effectively reducing waste water；Exposing
In the biological treatment step of gas biofilter, COD, BOD are further removed5、TN、NH3- N, while the SS remained in waste water is removed,
Make it is processed by the invention after waste water in COD, BOD5、TN、NH3The pollutants such as-N, TP, colourity can be stably reached《Integrated wastewater
Discharge standard》(GB8978-1996) " grade III Standard " and《Sewage enters town sewer water standard》(GB/T 31962-
2015) requirement of " B grades ", so as to avoid using the defect existing for reverse osmosis membrane processing technique.
4th, it is present invention employs the front-end processing mode of " oil removal precipitation process+regulating reservoir regulation ", i.e., useless to what is be processed
Water first carries out oil removal precipitation process, and treatment is then adjusted to waste water, with it is conventional be first adjusted treatment, after carry out oil removal
The mode ratio of precipitation process, can avoid grease from being gathered with large granular impurity and suspension under gravity in the regulating reservoir water surface
Sink to regulating reservoir bottom of pond, it is to avoid the frequent cleaning of regulating reservoir, be conducive to improving operating efficiency.
With reference to specific embodiment, the present invention is further described.
Brief description of the drawings
Accompanying drawing 1 is the process step of the invention flow chart.
Specific embodiment
Referring to accompanying drawing, with treatment scale as 100m3As a example by the kitchen garbage, waste-water of/d, specific embodiment is as follows：
Waste water and kitchen garbage after the dehydration of kitchen garbage slurry anaerobic fermentation process the waste water quality of other operations generation：
COD：12000~15000mg/L, BOD5：4500~5000mg/L, TN：2100~2400mg/L, NH3-N：1800~2000mg/
L, TP：110~130mg/L, SS：7000~10000mg/L, vegetable and animals oils：800~1000mg/L, pH：7.5~8, colourity：
800~1000 times.
Waste water and kitchen garbage after a, the dehydration of kitchen garbage slurry anaerobic fermentation process the waste water of other operations generation, first
Being introduced into oil removal preliminary sedimentation tank sink at the beginning of oil removal treatment, excludes the oil slick in waste water, large granular impurity and bulky grain in waste water
Suspension is separated and is deposited in oil removal preliminary sedimentation tank bottom of pond under gravity, and the sludge produced by precipitation enters storage mud
Pond, removal most suspended substances SS；Waste water after being processed through oil removal preliminary sedimentation tank enters regulating reservoir, and the water, water quality to waste water are entered
Row regulation, is beneficial to the stable operation of subsequent treatment operation；In the step a, the top of oil removal preliminary sedimentation tank is provided with oil slick baffle plate,
Bottom is provided with sludge bucket, and the oil slick density ratio water in waste water is small, is excluded in freedom by the oil slick baffle plate on oil removal preliminary sedimentation tank top
Float on the oil slick on waste water upper strata, the oil slick of retention is periodically removed using corresponding device, the large granular impurity in waste water and big
Grain suspension is deposited in the sludge bucket of oil removal preliminary sedimentation tank bottom under gravity, and the sludge of precipitation enters mud storage pool；Through
The waste water after processing that sunk at the beginning of oil removal subsequently enters the regulating reservoir, waste water water, water quality realization regulation of the regulating reservoir to being entered；
Oil removal preliminary sedimentation tank and regulating reservoir can use armored concrete pond body or carbon steel anticorrosion equipment pond body, oil removal preliminary sedimentation tank size：5m
× 2m × 3m (depth), regulating reservoir dischargeable capacity 100m3.After heavy regulating reservoir is processed at the beginning of oil removal, the SS ＜ 2000mg/L of waste water are moved
Vegetable oil ＜ 300mg/L.
Waste water after b, the treatment of adjusted pond enters a pH regulating reservoirs, to adding alkali (NaOH) in pond and be stirred mixed
Close, first time regulation is carried out to pH value of waste water, make the form of ammonia nitrogen in waste water from NH4 +It is converted into free ammonia (NH3), it is follow-up ammonia
Effective removal ammonia nitrogen of stripping process provides advantage；In the step b, by pH value of waste water in a pH regulating reservoirs
To 10.5~12, under the pH value, the form of ammonia nitrogen is from NH in waste water for regulation4 +It is converted into free ammonia (NH3)；First pH regulating reservoirs
Size：1.5m × 1.5m × 1.5m (depth), sets mixer and mixing, configuration pH value detector and control is stirred to waste water in pond
Instrument processed automatically controls the dosage of aqueous slkali.
C, processed through a pH regulating reservoirs after waste water enter Ammonia blowing-out tower inner chamber top, and by Ammonia blowing-out tower intracavity bottom
Air is blown up, gas liquid ratio is 2500~3500:1, waste water lands from top to bottom, and the air-flow of rising is abundant with the waste water for falling
Contact, by liquid --- gas mass transport process, free ammonia then switchs to gas phase and turns into ammonia-containing exhaust and discharge by liquid phase, realizes free
The stripping of ammonia and removal, make the carbon-nitrogen ratio (BOD in waste water5:TKN 4) are promoted to:1~6:1, for follow-up biological denitrificaion is provided
Suitable carbon-nitrogen ratio condition, is beneficial to follow-up biological denitrificaion treatment effect.In the step c, the middle part of Ammonia blowing-out tower inner chamber
Packing layer is set, and top is provided with water distribution component, and waste water is showered on filler through water distribution component water distribution from Ammonia blowing-out tower inner chamber top
Form water droplet state to fall along filler, adverse current is formed with the air being blown up from bottom of towe, air is fully contacted with waste water, dissociate
Ammonia then switchs to gas phase and turns into ammonia-containing exhaust by liquid phase, and is discharged by the outlet on Ammonia blowing-out tower top, and ammonia nitrogen removal frank is up to 60%
More than；The ammonia-containing exhaust discharged enters other corresponding processing unit otherwise processeds, such as enters respective handling device --- tail
Aspiration tower, using dilute sulfuric acid as ammonia absorbing liquid, ammonia-containing exhaust contacts generation chemical reaction generation ammonium sulfate with absorbing liquid
Solution, can be such that the ammonia in ammonia-containing gas is transferred in absorbing liquid from gas, through the tail gas qualified discharge after absorption, absorbing liquid (sulphur
Sour ammonium) can be used as agricultural fertilizer or other purposes.Because ammonia aeration process effectively eliminates free ammonia, in this example, gas liquid ratio is
3000:1, carbon-nitrogen ratio is improved to 5 in waste water:1~6:1；The ammonia nitrogen ＜ 800mg/L of the waste water after being processed through ammonia aeration.Described
The wastewater outlet of one pH regulating reservoirs is connected by conveying pipe fitting with the water distribution component water inlet of Ammonia blowing-out tower internal upper part, the delivery pipe
Delivery pump is set on part.
D, processed through Ammonia blowing-out tower after waste water enter the 2nd pH regulating reservoirs, to adding sulfuric acid (H in pond2SO4) and stirred
Mixing is mixed, second regulation is carried out to pH value of waste water, the suitable growing environment of microorganism is formed, for follow-up biochemical treatment is provided
Necessary environment；In the step d, pH value of waste water is adjusted to 7.0~8.5 in the 2nd pH regulating reservoirs, the pH value of waste water is adjusted
It is for suitable and be conducive to the Biochemical Treatment of follow-up A/O biochemical treatment apparatus to save to the effect of the scope.2nd pH is adjusted
Pool size：1.5m × 1.5m × 1.5m (depth), the mixer in the 2nd pH regulating reservoirs mixes to waste water, sets pH value detection
With the dosage that controller automatically controls sulfuric acid solution.
E, processed through second pH regulating reservoir after waste water carry out biochemical treatment into A/O biochemical treatment apparatus, effectively go
Except most COD, BOD5, further remove NH3- N, TN, effectively remove TP；In the step e, the A/O biochemical treatment apparatus
Microorganism in the interior activated sludge of middle aerobic zone (dissolved oxygen is 1.5~2.5mg/L) can effectively carry out metabolism, and (activity is dirty
Mud concentration MLSS, 3.5~4.5g/L), by COD, BOD in waste water5Degraded, while the nitrobacteria in activated sludge is by waste water
Ammonium oxidation be nitrate nitrogen and cultured water, due to the carbon-nitrogen ratio (BOD in waste water5:TKN) in ammonia aeration processing procedure
Effectively improve, the carbon source in waste water is enriched, (dissolved oxygen is 0.2~0.5mg/ for anoxic zone in the A/O biochemical treatment apparatus
L denitrifying bacterium consumption carbon source) COD, BOD in waste water is removed5While, nitrate nitrogen and cultured water are converted into nitrogen
Gas, by nitrification-denitrification reaction, realizes effective denitrogenation, while the polyP bacteria (microorganism) in activated sludge is in metabolism
During absorb phosphorus, form Quadrafos and be stored in the internal of polyP bacteria, effectively the phosphorus (biological phosphate-eliminating) in removal waste water；It is described
Muddy water mixed solution in A/O biochemical treatment apparatus aerobic zone is flowed back in the anoxic zone by the mechanism that flows back, and is formed " interior time
Stream ", internal reflux ratio is 200%~500%, and the internal reflux ratio in this example is 300%~400%.Waste water is at the A/O biochemistry
The total hrt for managing device is 10~20 days, wherein anoxic zone 4~6 days, aerobic zone 6~15 days, in this example, total waterpower
Residence time is 17 days, wherein anoxic zone 4 days, aerobic zone 13 days.Water outlet COD ＜ after being processed through A/O biochemical treatment apparatus
700mg/L, BOD5＜ 200mg/L, NH3- N ＜ 30mg/L, TN ＜ 80mg/L.In this example, the A/O biochemical treatment apparatus are existing
At the anaerobic-aerobic activated sludge process sewage of structured anaerobic-aerobic activated sludge process sewage-treatment plant or existing structure
Reason pond, is made up of anoxic zone, aerobic zone and backflow mechanism, pipeline, rabbling mechanism, aeration mechanism etc., and size is 20m × 20m
× 5m (depth).The wastewater outlet of the 2nd pH regulating reservoirs is connected by pipe fitting with the anoxic zone in A/O biochemical treatment apparatus, should
Pipe fitting is provided with delivery pump.
F, precipitation process is carried out into sedimentation basin through the waste water after A/O biochemical treatments, realize mud-water separation, further removal
SS, while carrying out chemical dephosphorization to aluminium salt or molysite is added in sedimentation basin, further removes the TP in waste water, through sedimentation tank mud
Partial sludge after water is separated is back in A/O biochemical treatment apparatus by reflux by the sedimentation basin, for maintaining A/O
The activated sludge concentration of biochemical treatment apparatus, the excess sludge in sedimentation basin enters mud storage pool；In the step f, aluminium salt or
The dosage of molysite is 20~100mg/L, and aluminium salt is used in this example, and dosage is 60~80mg/L, in specific implementation, according to useless
The adjustable aluminium salt of change or the dosage of molysite of water concentration.The dirt of A/O biochemical treatment apparatus is back to by the sedimentation basin
Mud reflux ratio is 50~100%.Through waste water SS ＜ 100mg/L, TP ＜ 6mg/L after precipitation process.
G, enter ozone reactor through the waste water (supernatant in sedimentation basin) after precipitation process, carry out contacting anti-with ozone
Should, the organic pollutant of the difficult for biological degradation in waste water is oxidized under the strong oxidation of ozone, and macromolecular is changed into small point
Son, it is easy to biochemical degradation, the biodegradability of waste water is improved, and is that follow-up BAF biochemical treatment creates conditions；Simultaneously
Partial organic substances are inorganic matter by exhaustive oxidation, further reduce COD, BOD in waste water5, while the coloured groups in waste water
Destroyed, the colourity of waste water is effectively reduced.In the step g, reaction time of the waste water in ozone reactor is (during hydraulic retention
Between) it is 1~3 hour, ozone dosage is 0.5~2g/L；In this example, ozone reactor is the ozone reactor of existing structure,
Size is φ 2.2m × 3m, and reaction time (hydraulic detention time) of the waste water in ozone reactor is about 2 hours, and ozone is added
It is 1.0~1.5g/L to measure, and the tail gas of ozone reactor is discharged after being decomposed through corresponding ozonolysis equipment.At ozone reactor
Water outlet COD ＜ 500mg/L, BOD after reason550 times of ＜ 150mg/L, colourity ＜.
H, processed through ozone reactor after waste water into carrying out biological treatment, waste water and microorganism in BAF
Film is fully contacted, and the organic matter in degrading waste water simultaneously carries out nitration denitrification denitrogenation, further eliminate COD in waste water,
BOD5, ammonia nitrogen, TN, while the filtering function of BAF realizes the removal to remaining SS；In this example, BAF
It is the BAF of existing structure, using ceramic grain filter, 3~4m/h of filtering velocity, the water outlet dissolved oxygen of BAF is not
Higher than 5mg/L, BAF is periodically backwashed using its water outlet.The wastewater outlet of the ozone reactor is by pipe
Part is communicated with BAF, and delivery pump is set on the pipe fitting.
I, through BAF process after waste water enter sterilization pool, sterile-processed rear qualified discharge；Disinfectant can
Using chlorine dioxide, ozone, bleaching powder etc.；Using chlorine dioxide as disinfectant in this implementation.
Sludge in j, the mud storage pool stimulates the menstrual flow after device for dehydrating sladge waste is processed and separately disposes；Device for dehydrating sladge waste can be used
Centrifugal dehydrator or belt type dewaterer etc., this example use centrifugal dehydrator, the outward transport of sludge after dehydration, dehydration liquid it is reflowable in every
Oily preliminary sedimentation tank.
After being processed through above-mentioned steps, pollutant concentration value and pollutants removal rate are as follows：
Go out water pollutant index to be superior to《Integrated wastewater discharge standard (GB8978-1996)》In " grade III Standard " and
《Sewage enters town sewer water standard》" B grades " standard in (GB/T 31962-2015).
Claims (8)
1. a kind of kitchen garbage, waste-water processing method, it is characterized in that comprising the following steps：
A, waste water are initially entered to be sunk at the beginning of oil removal preliminary sedimentation tank carries out oil removal and processed, and exclude the oil slick in waste water, the bulky grain in waste water
Impurity and bulky grain suspension are deposited in oil removal preliminary sedimentation tank bottom of pond under gravity, and the sludge produced by precipitation enters storage
Mud sump, removal most suspended substances SS；Waste water after being processed through oil removal preliminary sedimentation tank enters regulating reservoir, water, water quality to waste water
It is adjusted；
Waste water after b, the treatment of adjusted pond enters a pH regulating reservoirs, adds alkali NaOH and is stirred mixing, to waste water
PH value carries out first time regulation, makes the form of ammonia nitrogen in waste water by NH4 +It is converted into free ammonia (NH3)；
C, processed through a pH regulating reservoirs after waste water enter Ammonia blowing-out tower inner chamber top, it is and upward by Ammonia blowing-out tower intracavity bottom
Air is blowed, gas liquid ratio is 2500~3500:1, waste water lands from top to bottom, and the air-flow of rising fully connects with the waste water for falling
Touch, by liquid --- gas mass transport process, free ammonia then switchs to gas phase and turns into ammonia-containing exhaust and discharge by liquid phase, realizes free ammonia
Stripping with removal, make the carbon-nitrogen ratio (BOD in waste water5:TKN 4) are promoted to:1~6:1；
D, through Ammonia blowing-out tower process after waste water enter the 2nd pH regulating reservoirs, add sulfuric acid H2SO4And mixing is stirred, to useless
The pH value of water carries out second regulation, forms the suitable growing environment of microorganism；
E, processed through second pH regulating reservoir after waste water carry out biochemical treatment into A/O biochemical treatment apparatus, effectively removal is big
Part COD, BOD5, further remove NH3- N, TN, effectively remove TP；
F, precipitation process is carried out into sedimentation basin through the waste water after A/O biochemical treatments, realizes mud-water separation, further remove SS,
While carrying out chemical dephosphorization to aluminium salt or molysite is added in sedimentation basin, the TP in waste water is further removed；
G, enter ozone reactor through the waste water after precipitation process, carry out haptoreaction with ozone, the difficult for biological degradation in waste water
Organic pollutant under the strong oxidation of ozone be oxidized, macromolecular is changed into small molecule, it is easy to biochemical degradation, waste water
Biodegradability is improved, meanwhile, partial organic substances are inorganic matter by exhaustive oxidation, further reduce COD, BOD in waste water5, give up
Coloured groups in water are destroyed, and the colourity of waste water is effectively reduced；
H, processed through ozone reactor after waste water into biological treatment is carried out in BAF, waste water fills with microbial film
Tap is touched, and the organic matter in degrading waste water simultaneously carries out nitration denitrification denitrogenation, further eliminates COD, BOD in waste water5、
TN、NH3- N, meanwhile, the filtering function of BAF realizes the removal to remaining SS；
I, through BAF process after waste water enter sterilization pool, sterile-processed rear qualified discharge；
Sludge in j, the mud storage pool is separately disposed after being processed through device for dehydrating sladge waste.
2. according to a kind of kitchen garbage, waste-water processing method described in claim 1, it is characterized in that, in the step b, described
PH value of waste water is adjusted to 10.5~12 in first pH regulating reservoirs.
3. according to a kind of kitchen garbage, waste-water processing method described in claim 1, it is characterized in that, in the step c, ammonia aeration
Middle part in tower sets packing layer, and top is provided with water distribution component, waste water through water distribution component water distribution, from Ammonia blowing-out tower internal upper part sprinkle
Water droplet state is formed on to filler to fall along filler.
4. according to a kind of kitchen garbage, waste-water processing method described in claim 1, it is characterized in that, in the step d, second
PH value of waste water is adjusted to 7~8.5 in pH regulating reservoirs.
5. according to a kind of kitchen garbage, waste-water processing method described in claim 1, it is characterized in that, in the step e, the A/
Microorganism in O biochemical treatment apparatus in aerobic zone in activated sludge can effectively carry out metabolism, by COD in waste water,
BOD5Degraded, while the ammonium oxidation in waste water is nitrate nitrogen and cultured water by nitrobacteria in activated sludge, it is described
The denitrifying bacterium consumption carbon source of anoxic zone COD, BOD in waste water is removed in A/O biochemical treatment apparatus5While, by nitrate
Nitrogen and cultured water are converted into nitrogen, realize the effective denitrogenation of nitrification-denitrification, while the polyP bacteria in activated sludge is in new old generation
Phosphorus is absorbed during thanking, it is the internal of polyP bacteria to form Quadrafos storage, effectively the phosphorus in removal waste water；The aerobic zone
Interior muddy water mixed solution is flowed back in the anoxic zone by the mechanism that flows back, and is formed " interior backflow ", and internal reflux ratio is 200%~
500%.
6. according to a kind of kitchen garbage, waste-water processing method described in claim 5, it is characterized in that, waste water is biochemical in the A/O
The total hrt of processing unit is 10~20 days, wherein anoxic zone 4~6 days, aerobic zone 6~15 days.
7. according to a kind of kitchen garbage, waste-water processing method described in claim 1, it is characterized in that, in the step f：
A/O biochemical treatment apparatus, reflux ratio are back to by the sedimentation basin through the partial sludge after the sedimentation basin mud-water separation
It is 50~100%, the activated sludge concentration for maintaining A/O biochemical treatment apparatus, the excess sludge in sedimentation basin enters storage mud
Pond；
It is 20~100mg/L to the dosage that aluminium salt or molysite are added in sedimentation basin.
8. according to a kind of kitchen garbage, waste-water processing method described in claim 1, it is characterized in that, in the step g, waste water exists
Reaction time in ozone reactor is 1~3 hour, and ozone dosage is 0.5~2g/L.
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| CN114850170A (en) * | 2022-04-22 | 2022-08-05 | 北京交通大学 | Kitchen garbage resource and energy recovery pollution-reducing carbon-reducing cooperative device |
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