CN110092536A - A kind of kitchen anaerobic digestion biogas slurry combined treatment process - Google Patents
A kind of kitchen anaerobic digestion biogas slurry combined treatment process Download PDFInfo
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- CN110092536A CN110092536A CN201910338159.7A CN201910338159A CN110092536A CN 110092536 A CN110092536 A CN 110092536A CN 201910338159 A CN201910338159 A CN 201910338159A CN 110092536 A CN110092536 A CN 110092536A
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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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- 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
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- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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- 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
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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- 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
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/127—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
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- C02F3/00—Biological treatment of water, waste water, or sewage
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Abstract
The present invention provides a kind of kitchen anaerobic digestion biogas slurry combined treatment process, mainly includes pretreatment system, high-efficiency biological denitrification processing system, MBR processing system；Through the invention, to solve investment and the operating cost height of kitchen anaerobic digestion biogas slurry treatment engineering of the existing technology, effluent quality fluctuation is big, is discharged the problem of being difficult to stably reaching standard.Present invention process advantage is while the pollutants such as the removal carbon of high-efficiency low energy consumption, nitrogen to have good treatment effect for kitchen garbage biogas slurry, anti-kitchen biogas slurry waste water quality water impact load ability is strong, and operation energy consumption and operating cost are low.This group technology is not only suitable for the processing of kitchen anaerobic digestion biogas slurry, and may be equally applied to the processing of other high ammonia nitrogens, high concentrated organic wastewater.
Description
Technical field
The present invention relates to kitchen garbage processing technology fields, and in particular to a kind of kitchen anaerobic digestion biogas slurry combined treatment work
Skill.
Background technique
With the improvement of living standards, the pollution problem of kitchen garbage is outstanding day by day.The processing of kitchen garbage is also quietly emerging
It rises, but also brings the biogas slurry problem of anaerobic digestion of kitchen wastes generation therewith.
The characteristics of kitchen anaerobic digestion biogas slurry: (1) pollutant is complex in composition changeable；(2) organic pollutant concentration is high: COD
Concentration is up to 10000mg/L~30000mg/L or so；(3) ammonia nitrogen concentration is high: ammonia nitrogen concentration generally 1500mg/L~
3000mg/L or so；(4) heavy metal ion and salt content are high: the salinity of kitchen biogas slurry is up to 0.5~1%；(5) fat content
High: general animal and plant fat content is in 500mg/L~1000mg/L.
The common treatment process of kitchen anaerobic digestion biogas slurry: since the concentration of kitchen waste water is high and complicated component, so institute
High COD, the ability of high ammonia nitrogen and high grease can be effectively removed simultaneously by selecting technique that must have.This kitchen waste water is higher containing grease,
Therefore oil removal treatment need to be increased before common process.Oil removal processing is generally carried out using coagulation-air-float technology.By conditioning tank+mixed
After the pretreatments such as solidifying air bearing, grease and organic concentration in waste water are greatly lowered, and waste water needs to carry out biological denitrificaion thereafter
Treatment process is to remove most of nitrogen pollutant and remaining organic matter in waste water.Biological denitrification process include conventional denitrification/
Nitrify (An/O) technique and other Process of Biological Nitrogen Removal (such as anaerobic ammonia oxidation process, short-cut nitrification-denitrification technique, same
When nitration denitrification technology etc.).And biological denitrificaion processing needs microorganism to keep longer sludge age, and membrane treatment process has
Sludge is retained, sludge concentration is increased, improves the advantages such as sludge age, so the economy of biological denitrificaion treatment process and membrane technology
The combination that the effluent quality of high standard has promoted membrane technology in recent years and aerobic microbiological to handle, in terms of removing nitrogen pollutant
The powerful market competitiveness is shown, such as MBR reactor process.In conclusion kitchen anaerobic digestion biogas slurry treatment technique
For " oil removing+pretreatment+biological denitrificaion processing+film filtering " technique.Pretreatment+biological denitrificaion treatment process generally uses at present
" UASB+ two-stage A/O ", technique are mainly manifested in following aspects there are some defects:
1) two-stage A/O biochemistry pool takes up a large area, and construction investment is larger.
It is all raw using traditional two-stage A/O since ammonia nitrogen and organic concentration are higher in kitchen anaerobic digestion biogas slurry
Change pond and need to design biggish pool capacity (area), causes project occupied area larger, Civil Cost is higher.
2) operating cost is high: biochemical using traditional two-stage A/O since ammonia nitrogen concentration is up to 2500mg/L in kitchen biogas slurry
Pond needs the biggish air blower of design power to meet the aeration needs of nitrification tank, and air blower needs while satisfaction are said several in waste water
The organic matter aeration of thousand or even mg/L up to ten thousand is removed to the discharge standard of 500mg/L, while needing to say 2500mg/L in waste water
Ammonia nitrogen aeration becomes nitrate anion, simultaneously because aerobic tank needs strength aeration to remove most of organic matter and ammonia nitrogen, causes back
Carbon source is insufficient when flowing to the nitrate anion denitrification of the 2500mg/L in denitrification, needs to add a large amount of additional carbon at this time, lead
Operating cost is caused to increase.In addition, the sludge quantity that system organic matter and ammonia nitrogen aeration reaction generate, increases sludge treating system
Burden and expense.
3) effluent quality fluctuation is big, and water outlet is difficult to stably reaching standard: traditional handicraft uses UASB+ two-stage A/O-MBR technique
Or two-stage A/O-MBR technique, system by pretreatment after by one of technique of two-stage A/O-MBR with regard to direct emission, in system
Influent quality water fluctuates in biggish situation, it is difficult to resist system shock load, and lack necessary process control means.
4) anaerobic methane safety problem: the content of organic matter is higher in some areas, kitchen garbage, leads to anaerobic digestion natural pond
Organic concentration is likely to be breached 10,000-3 ten thousand mg/L in liquid, needs first to be pre-processed using anaerobic reactors such as UASB at this time, by
This can bring the safety issue of biogas treatment, and part kitchen processing item does not allow scene setting biogas container, methane boiler,
The danger sources such as anaerobic reactor.Which also limits traditional UASB+ two-stage A/O-MBR technique answering in kitchen biogas slurry treatment
With.
Summary of the invention
The present invention provides a kind of kitchen anaerobic digestion biogas slurry combined treatment process, is detested with solving kitchen of the existing technology
The problem of oxygen digests investment and the operating cost height of biogas slurry treatment engineering, and effluent quality fluctuation is big, and water outlet is difficult to stably reaching standard.
In order to solve the above technical problems, the present invention provides a kind of kitchen anaerobic digestion biogas slurry combined treatment process, it is main to wrap
Include pretreatment system, high-efficiency biological denitrification processing system, MBR processing system；
The pretreatment system includes conditioning tank and coagulation floatation, in conditioning tank to kitchen anaerobic digestion biogas slurry into
The adjusting of row water quality, water；Conditioning tank residence time 12h；Conditioning tank water outlet is pumped into coagulating basin by water pump, adds PAC and PAM medicine
Dosage form is at floccule body, and water outlet enters integration air-float equipment and handles, to remove most of suspended matters and the oil in kitchen biogas slurry
Rouge adversely affects to avoid to subsequent biochemical pond and membranous system, and the coagulating basin residence time is 1.5h, when airfloat equipment stops
Between be 48min；
The high-efficiency biological denitrification processing system includes high exposure water inlet tank, high load aeration tank, radical sedimentation basin and detests
Anaerobic ammonium oxidation water inlet tank, anaerobic ammonia oxidation reactor, flotation tank water outlet enter high exposure water inlet tank, and hydraulic detention time 1.5h is high
It exposes and sets mechanical agitator in water inlet tank, water outlet is lifted into high load aeration tank, the water outlet gravity of high load aeration tank by pump
Into radical sedimentation basin, after mud-water separation, sludge part flows back into high load aeration tank bottom, partially drains into sludge condensation
Pond, clear liquid enter Anammox water inlet tank, residence time 1.5h, Anammox water inlet tank in set mechanical agitator, it is described
NaOH lye, which is added, in Anammox water inlet tank adjusts pH and micro- nutritive salt to meet the ammonia oxygen in anaerobic ammonia oxidation reactor
Change the growth and breeding requirement of red bacterium；The water outlet of Anammox water inlet tank is lifted into anaerobic ammonia oxidation reactor by pumping, and is detesting
In anaerobic ammonium oxidation reactor, for the ammonia nitrogen in kitchen biogas slurry under the conditions of aerobic aeration, part nitrification generates nitroso nitrogen, generation
Nitroso nitrogen directly reacts the removal for generating nitrogen and realizing ammonia nitrogen, water outlet weight with ammonia nitrogen under the action of ANAMMOX microorganism
Force flow enters MBR processing system front end；
MBR processing system is made of denilrification system, nitrification and built-in ultrafiltration system, wherein denilrification system and
Nitrification uses two-stage process, and MBR processing system includes that sequentially connected level-one denitrification pond, level-one nitrification tank, second level are anti-
Nitrification tank, second level nitrification tank and a built-in ultrafiltration membrane pool.
The high load aeration tank uses high tower cylinder of steel structure, and the design residence time is 30h, the high load aeration tank
The interior dedicated aerator of setting, designs available depth 8m.
The anaerobic ammonia oxidation reactor design denitrifying load is not less than 1.6kgNH4-N/ (m3.d), and Anammox is anti-
Device is answered to be discharged TS < 1000mg/L.
The MBR processing system sets mixed liquor return-flow system of the level-one nitrification tank to level-one denitrification pond, second level nitre respectively
Change pond to second level denitrification pond mixed liquor return-flow system and ultrafiltration membrane pool to level-one denitrification pond sludge recirculation system, time
Stream is than being respectively 600%, 350% and 350%.Specifically, level-one nitrification tank is connect by pipeline with level-one denitrification pond, and two
Grade nitrification tank is connect by pipeline with second level denitrification pond, and for realizing nitrate reflux, ultrafiltration membrane pool passes through pipeline and level-one
The connection of denitrification pond to realize sludge reflux, while sewage backflow not up to standard being sent to denitrification pond and is carried out at denitrification
Reason.
It further include sludge treating system, the sludge treating system includes sludge concentration tank and centrifugal dehydrator, and air bearing produces
The sludge that raw dross, sedimentation basin and MBR processing system generate is discharged into sludge concentration tank, it is concentrated after sludge by sludge into
Material is pumped into centrifugal dehydrator and is carried out dehydrating, the pressing filtering liquid that the supernatant and centrifugal dehydrator that sludge concentration tank generates generate
It is discharged into conditioning tank together, the system of returning to re-starts processing, and the mud cake after filters pressing transports outward incineration disposal.The sludge concentration tank
Design concentration time is 20h.
Bring of the present invention is used the utility model has the advantages that the present invention provides a kind of Novel kitchen anaerobic digestion biogas slurry treatment technique
Novel biological dinitrification (Anammox) technique, greatly reduce kitchen anaerobic digestion biogas slurry treatment engineering investment and operation at
This, while effluent quality is also significantly promoted, discharge standard water quality requirement is significantly better than using the effluent quality of the system.
Detailed description of the invention
Fig. 1 is the schematic process flow diagram of present invention process.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with drawings and the specific embodiments, to this
Invention is described in further detail.
Embodiment one
The present invention is successfully applied to Wuxi curry favour connection kitchen castoff processing engineering, and treatment process uses as shown in Figure 1
Method.
Kitchen anaerobic digestion biogas slurry combined treatment process provided by the invention mainly includes pretreatment system, high-performance bio
Denitrogenation processing system, MBR processing system；
The pretreatment system includes conditioning tank and coagulation floatation, in conditioning tank to kitchen anaerobic digestion biogas slurry into
The adjusting of row water quality, water；Conditioning tank residence time 12h；Conditioning tank water outlet is pumped into coagulating basin by water pump, adds PAC and PAM medicine
Dosage form is at floccule body, and water outlet enters integration air-float equipment and handles, to remove most of suspended matters and the oil in kitchen biogas slurry
Rouge adversely affects to avoid to subsequent biochemical pond and membranous system, and the coagulating basin residence time is 1.5h, when airfloat equipment stops
Between be 48min；
The high-efficiency biological denitrification processing system includes high exposure water inlet tank, high load aeration tank, radical sedimentation basin and detests
Anaerobic ammonium oxidation water inlet tank, anaerobic ammonia oxidation reactor, flotation tank water outlet enter high exposure water inlet tank, and hydraulic detention time 1.5h is high
It exposes and sets mechanical agitator in water inlet tank, water outlet is lifted into high load aeration tank by pump, and high load aeration tank uses high tower
Cylinder of steel structure (the design residence time is 30h), inside sets dedicated aerator, designs available depth 8m.The main feature of this reactor
Be by optimization design and accurate control so that high load capacity aeration reaction pond mainly plays the function of efficiently removing organic matter, and
Removal effect is hardly risen to ammonia nitrogen.In order to guarantee have enough ammonia nitrogens dense in subsequent efficient denitrification reactor high load capacity water inlet
Degree, high load capacity aeration reaction pond must not exceed 10% to the removal rate of ammonia nitrogen, and ensure high load capacity aerating system water outlet COD <
3000mg/L.To control sludge age, avoid that nitration reaction occurs in high load capacity aeration reactor, dirt in high load capacity aeration reactor
Mud concentration (MLSS) must not exceed 8g/L.The water outlet gravity of high load aeration tank enters radical sedimentation basin, since high load capacity exposes
The strong aeration stirring in gas pond acts on, so the mud mixture of its water outlet needs the longer residence time to remove glar moisture
From radical sedimentation basin design surface hydraulic loading is 0.6m3/(m2.h), after mud-water separation, sludge part flows back into high load capacity
It is aerated bottom of pond portion, partially drains into sludge concentration tank, clear liquid enters Anammox water inlet tank, residence time 1.5h, anaerobism ammonia oxygen
Change and set mechanical agitator in water inlet tank, adds NaOH lye in the Anammox water inlet tank and adjust pH and micro- nutritive salt with full
The growth and breeding requirement of the red bacterium of ammoxidation in sufficient anaerobic ammonia oxidation reactor；The water outlet of Anammox water inlet tank is promoted by pump
Into anaerobic ammonia oxidation reactor, in ANAMMOX reactor, the ammonia nitrogen in kitchen biogas slurry is under the conditions of aerobic aeration, part
Nitrification generates nitroso nitrogen, and the nitroso nitrogen of generation directly reacts under the action of ANAMMOX microorganism with ammonia nitrogen generates nitrogen
Realize the removal of ammonia nitrogen.This process is not needed to add any carbon source, be exposed simultaneously due to the generation of not no anti-nitration reaction
Tolerance is significantly reduced compared with nitrification/denitrification process, so that operating cost sharp fall.Ammonia oxidation reactor may be implemented
The NH4-N removal rate of 80% or more TN removal rate and 90% or more.Ammonia oxidation reactor design denitrifying load is not less than
1.6kgNH4-N/(m3.d), reactor is discharged TS < 1000mg/L.It is discharged gravity and flows into MBR processing system front end.
MBR processing system is made of denilrification system, nitrification and built-in ultrafiltration system, wherein denilrification system and
Nitrification uses two-stage process, and MBR processing system includes that sequentially connected level-one denitrification pond, level-one nitrification tank, second level are anti-
Nitrification tank, second level nitrification tank and a built-in ultrafiltration membrane pool.Aeration uses the blast aeration of special equipment jet stream in nitrification tank, leads to
Excessively high active aerobic microbiological acts on, and the majority of organic pollutants in sewage is degraded in nitrification tank, while ammonia nitrogen
Nitrate nitrogen, nitrite nitrogen are oxidized under nitrifying microorganisms effect.Nitrate nitrogen, nitrite nitrogen are back in denitrification pond in anoxic
It is reduced into nitrogen discharge in environment, achievees the purpose that biological denitrificaion.Microbial cells are divided from water outlet by high-performance ultrafiltration system
From, it is ensured that suspended matter and larger molecular organics are fully trapped in system, and ultrafiltration membrane uses immersion PTFE material curtain type membrane,
It is 10L/ (m that ultrafiltration, which designs membrane flux,2·h).The hydraulic detention time of each process section of two-stage A/O biochemical system is anoxic pond 1:
20h, aerobic tank 1:40h, anoxic pond 2:12h, aerobic tank 2:24h.The MBR processing system sets level-one nitrification tank to level-one respectively
The mixed liquor return-flow system in denitrification pond, the mixed liquor return-flow system and ultrafiltration membrane pool of second level nitrification tank to second level denitrification pond are extremely
The sludge recirculation system in level-one denitrification pond, reflux ratio are respectively 600%, 350% and 350%.Specifically, level-one nitrifies
Pond is connect by pipeline with level-one denitrification pond, and second level nitrification tank is connect by pipeline with second level denitrification pond, for realizing nitre
Hydrochlorate reflux, ultrafiltration membrane pool are connect by pipeline with level-one denitrification pond, to realize sludge reflux, while by dirt not up to standard
Water reflux, which is sent to denitrification pond, carries out denitrification processing.
It further include sludge treating system, the sludge treating system includes sludge concentration tank and centrifugal dehydrator, and air bearing produces
The sludge that raw dross, sedimentation basin and MBR processing system generate is discharged into sludge concentration tank, it is concentrated after sludge by sludge into
Material is pumped into centrifugal dehydrator and is carried out dehydrating, the pressing filtering liquid that the supernatant and centrifugal dehydrator that sludge concentration tank generates generate
It is discharged into conditioning tank together, the system of returning to re-starts processing, and the mud cake after filters pressing transports outward incineration disposal.The sludge concentration tank
Design concentration time is 20h.
Furthermore, it is understood that the mating sewage disposal system of Wuxi City kitchen garbage processing item, processing material includes 250 tons/
Its kitchen garbage, 150 ton/days of perishable rubbish, 50 ton/days of waste greases.Sewage disposal system includes taking off after anaerobic digester system
The biogas slurry of water rinses vehicle and waste water, the workshop flushing waste water of ground generation etc..Unified collect of waste water enters conditioning tank, by adjusting
Section pond elevator pump is lifted into subsequent sewage disposal system.Design sewage disposal system treating capacity is 650m3/d。
Design Inlet and outlet water water quality such as table 1:
| Water quality indicator | Unit | Raw water quality | Emission limit |
| COD | (mg/l) | 15000 | 500 |
| BOD5 | (mg/l) | 6000 | 300 |
| TN | (mg/l) | 3000 | 70 |
| NH4-N | (mg/l) | 2500 | 45 |
| TSS | (mg/l) | 6000 | 400 |
| pH | — | 6~9 | 6.5~9.5 |
| Vegetable and animals oils | (mg/l) | 1000 | 30 |
Treatment process each unit designs removal effect such as the following table 2:
Engineering design
(1) conditioning tank and accident pool: Reinforced Concrete Structure adjusts 10.0 × 5.0 × 6.5m of pool size, and available depth 6.0m has
Imitate volume 300m3, underground type, mating elevator pump and diving mixer；Accident 10.0 × 10.0 × 6.5m of pool size, available depth
6.0m, dischargeable capacity 600m3, mating elevator pump and diving mixer.
(2) coagulation floatation: including coagulation reaction tank and combined air flotation equipment.Wherein coagulation reaction tank uses steel concrete knot
Structure, size 2.0m × 3.0m × 6.5m, available depth 5.0m, dischargeable capacity 30m3 inside set 1 flash mixer and 1 at a slow speed
Blender；Combined air flotation equipment uses carbon steel anti-corrosion material, size 6.0m × 3.0m × 2.1m.
(3) high load aeration tank: carbon steel anti-corrosion material, dischargeable capacity 830m3, size Φ 11.5m × 9.0m, available depth
8.0m.Residence time is 1.17d, and standard aerobic amount is 2400kgO2/d.Main mating mud discharging pump, micro-hole aerator and drum
Blower.
(4) sedimentation basin: radical sedimentation basin, size Φ 8.0m × 4.5m, dischargeable capacity 200m3.
(5) carbon steel anti-corrosion material, size 12.0 × 9.0m of Φ, dischargeable capacity 915m3 anaerobic ammonia oxidation reactor: are used.
It designs denitrifying load 1.6kgN/ (m3.d), 30~38 DEG C of water temperature of design, 100 tons of ANAMMOX sludge quantity (red bacterium), standard aerobic
Amount is 3000kgO2/d.Capital equipment includes intake pump, mud discharging pump, air blower, micro-hole aerator, plate heat exchanger, cold
But tower, steam jet ejector, cold water water pump, cooling sludge pump, micro- nutritive salt add pump etc..
(6) MBR system: the total dischargeable capacity of MBR system is 3140m3, total residence time 115.8h.Wherein, the anti-nitre of level-one
Change pool size 9.0m × 10.0m × 7.0m, HRT=21.6h；Level-one nitrifies pool size 17.0m × 10.0m × 7.0m, HRT=
40.8h；Second level denitrification pool size 9.0m × 7.0m × 7.0m, HRT=15.1h；Second level nitrification pool size 17.0m × 7.0m ×
7.0m, HRT=28.6h；Membrane tank dimensions 13.5m × 3.0m × 7.0m, HRT=9.7h.Pond is built jointly, using reinforced concrete structure,
Available depth 6.5m.
Biochemistry pool designs sludge concentration 8kg/m3, denitrification rate 0.065kgNO3-N/ (kgMLSSd), day remaining dirt
Mud amount 710kgSS/d, biochemical oxygen demand (BOD) 908.2kgO2/d；Membrane flux 10L/ (m2h), membrane area 2900m2,0.1 μ of membrane aperture
M, using PTFE material.Sludge discharge 24m3/d.
Capital equipment includes a second level denitrification pond blender, jet aerator, jet-loop pump, a second level nitrification liquid time
Flow pump, suction pump, backwashing pump, sludge reflux pump, air blower, MBR membrane module, plate heat exchanger, cooling water pump, cooling sludge pump
Deng.
(7) sludge treating system:.The strain (red bacterium) that anaerobic ammonia oxidation reactor generates directly is pumped by mud discharging pump
Enter and separated on hydraulic screen, the red bacterium sifted out can externally sell.The dross that air bearing generates, sedimentation basin and MBR system discharge
Excess sludge be discharged into sludge concentration tank, concentration basin supernatant is discharged into underground conditioning tank, and thickened sludge passes through sewage sludge feed and pumps
Centrifugal dewatering of sludge machine is transported to be carried out dehydrating.The filtrate that concentration basin supernatant and sludge dewatering generate flows back into adjusting
Pond.Capital equipment includes centrifugal dehydrator, medicine system, sewage sludge feed pump etc..
Investment and operating cost analysis
It is 30,000,000 yuan that Wuxi curry favour, which joins kitchen castoff anaerobic digestion biogas slurry treatment total investment of engineering, wherein civil engineering costs
8000000,22,000,000 yuan of equipment and installation and debugging part, investment cost is significantly less than market similar projects.This project runtime fortune
Row expense such as table 3:
In summary, the mating sewage disposal system of Wuxi City kitchen garbage processing item has the advantage that
(1) small investment: this project gross investment and civil engineering, equipment and the investment of installation and debugging part are significantly less than use
The traditional handicraft of the similar waste water of the processing such as " UASB+MBR (two-stage A/O) or MBR (two-stage A/O) technique ".
(2) occupied area is small: due to using high tower high load aeration tank and Anammox technology, the water inlet of the pond MBR
Organic matter and ammonia nitrogen are lower, significantly reduce the pool capacity and area of two-stage A/O biochemistry pool.
(3) discharge standard water quality requirement is significantly better than using the effluent quality of the system: is protected since this project designs more sets
The group technology of barrier system can make effluent quality better than standard of drainage limit value, and it is 300mg/L (discharge value that system, which is discharged COD,
500mg/L), water outlet total nitrogen can accomplish 50mg/L (discharge value 70mg/L) when not adding carbon source, if after adding carbon source
It can accomplish that the low value of 30mg/L, water outlet ammonia nitrogen are 30mg/L (discharge value 45mg/L).
(4) system has stronger capacity of resisting impact load: since system effluent quality is lower than discharge limitation, so that system
Water inlet can bear the fluctuation of certain water and water quality, and high load capacity aerating system in system, Anaerobic ammonium oxidation system, MBR
System, which devises, surmounts system and automatic control of liquid level locking system, and in MBR system, level-one nitrification tank, which devises, directly connects membrane cisterna
Surmount pipe, can be according to water quality and water without second level A/O biochemical treatment, system when amount of inlet water is little
It is required that controlling the liquid level and switching water flow running way in each reactor, guarantee that system can be with reliable and stable qualified discharge, and pass through
Ji energy conservation.
(5) excess sludge (red bacterium) that Anaerobic ammonium oxidation system generates can externally sell acquirement income, sludge yield compared with
Low: the red bacterium income of this project Anammox reaches 4.615 yuan/m3 waste water；Since most ammonia-nitrogen is reacted in Anammox
Removal in device, and the strain (red bacterium) that anaerobic ammonia oxidation reactor generates directly is pumped on hydraulic screen by mud discharging pump and is carried out
Separation, the red bacterium sifted out can externally sell, and do not need to be discharged into sludge concentration tank and go to handle, so significantly reducing the dirt of system
Mud discharge amount and dehydrated sludge disposition amount.
(6) system operation cost is lower: direct operating cost is only 9.50 yuan/m3, counts equipment depreciation and update cost in
It is afterwards 15.8 yuan/m3, this two operating costs are similarly significantly less than " UASB+MBR (two-stage A/O) or MBR (two-stage A/O) work
The traditional handicraft of the similar waste water of the processing such as skill ".
In conclusion the present invention provides a kind of Novel kitchen anaerobic digestion biogas slurry treatment technique, with novel biological dinitrification
(Anammox) technique greatly reduces the investment and operating cost of kitchen anaerobic digestion biogas slurry treatment engineering, while also big
Amplitude promotes effluent quality, is significantly better than discharge standard water quality requirement using the effluent quality of the system.The group technology is not only
It is suitable for the processing of kitchen anaerobic digestion biogas slurry, and may be equally applied to the processing of other high ammonia nitrogens, high concentrated organic wastewater.
The above description is only an embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should be included within scope of the presently claimed invention.
Claims (6)
1. a kind of kitchen anaerobic digestion biogas slurry combined treatment process, it is characterised in that: mainly include pretreatment system, high-performance bio
Denitrogenation processing system, MBR processing system；
The pretreatment system includes conditioning tank and coagulation floatation, carries out water to kitchen anaerobic digestion biogas slurry in conditioning tank
The adjusting of matter, water；Conditioning tank residence time 12h；Conditioning tank water outlet is pumped into coagulating basin by water pump, adds PAC and PAM medicament shape
At floccule body, water outlet enters integration air-float equipment and handles, to remove most of suspended matters and the grease in kitchen biogas slurry, with
It avoids adversely affecting subsequent biochemical pond and membranous system, the coagulating basin residence time is 1.5h, and the airfloat equipment residence time is
48min；
The high-efficiency biological denitrification processing system includes high exposure water inlet tank, high load aeration tank, radical sedimentation basin and anaerobism ammonia
Oxidation water inlet tank, anaerobic ammonia oxidation reactor, flotation tank water outlet enter height and expose tank of intaking, and water outlet is lifted into high load capacity by pump
Aeration tank, the water outlet gravity of high load aeration tank enter radical sedimentation basin, and after mud-water separation, sludge part flows back into high load capacity
It is aerated bottom of pond portion, partially drains into sludge concentration tank, clear liquid enters Anammox water inlet tank, and the Anammox is intake in tank
It adds NaOH lye adjusting pH and micro- nutritive salt is wanted with the growth and breeding for meeting the red bacterium of the ammoxidation in anaerobic ammonia oxidation reactor
It asks；The water outlet of Anammox water inlet tank is lifted into anaerobic ammonia oxidation reactor by pumping, in anaerobic ammonia oxidation reactor, meal
For ammonia nitrogen in the biogas slurry of kitchen under the conditions of aerobic aeration, part nitrification generates nitroso nitrogen, and the nitroso nitrogen and ammonia nitrogen of generation exist
Directly reaction generates the removal that nitrogen realizes ammonia nitrogen under the action of ANAMMOX microorganism, and water outlet gravity flows into MBR processing system
Front end；
MBR processing system is made of denilrification system, nitrification and built-in ultrafiltration system, and MBR processing system includes successively
Level-one denitrification pond, level-one nitrification tank, second level denitrification pond, second level nitrification tank and a built-in ultrafiltration membrane pool for connection.
2. kitchen anaerobic digestion biogas slurry combined treatment process as described in claim 1, which is characterized in that the high load capacity aeration
Pond uses high tower cylinder of steel structure, and the design residence time is 30h, the dedicated aerator of setting, design in the high load aeration tank
Available depth 8m.
3. kitchen anaerobic digestion biogas slurry combined treatment process as described in claim 1, which is characterized in that the Anammox
Reactor design denitrifying load is not less than 1.6kgNH4-N/(m3.d), anaerobic ammonia oxidation reactor is discharged TS < 1000mg/L.
4. kitchen anaerobic digestion biogas slurry combined treatment process as described in claim 1, which is characterized in that the MBR processing system
System set respectively level-one nitrification tank to the mixed liquor return-flow system in level-one denitrification pond, second level nitrification tank to second level denitrification pond it is mixed
Liquid return-flow system and ultrafiltration membrane pool are closed to the sludge recirculation system in level-one denitrification pond, reflux ratio is respectively 600%, 350%
With 350%.
5. kitchen anaerobic digestion biogas slurry combined treatment process as described in claim 1, which is characterized in that further include Treatment of Sludge
System, the sludge treating system include sludge concentration tank and centrifugal dehydrator, at dross, sedimentation basin and the MBR that air bearing generates
The sludge that reason system generates is discharged into sludge concentration tank, it is concentrated after sludge centrifugal dehydrator progress is pumped by sewage sludge feed
Dehydration, the pressing filtering liquid that the supernatant and centrifugal dehydrator that sludge concentration tank generates generate are discharged into conditioning tank together, return to
System re-starts processing, and the mud cake after filters pressing transports outward incineration disposal.
6. kitchen anaerobic digestion biogas slurry combined treatment process as claimed in claim 5, which is characterized in that the sludge concentration tank
Design concentration time is 20h.
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| CN113458125A (en) * | 2021-07-26 | 2021-10-01 | 中国环境保护集团有限公司 | Kitchen waste treatment system and method |
| CN114249490A (en) * | 2021-12-14 | 2022-03-29 | 深圳市腾浪再生资源发展有限公司 | Efficient nitrogen and phosphorus removal process for kitchen wastewater with low carbon-nitrogen ratio |
| CN114560595A (en) * | 2022-03-01 | 2022-05-31 | 北京坦思环保科技有限公司 | Treatment method and treatment system for kitchen waste biogas slurry |
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| CN114249490A (en) * | 2021-12-14 | 2022-03-29 | 深圳市腾浪再生资源发展有限公司 | Efficient nitrogen and phosphorus removal process for kitchen wastewater with low carbon-nitrogen ratio |
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