CN107265791A - Kitchen garbage slurry fermentation waste water processing unit - Google Patents

Kitchen garbage slurry fermentation waste water processing unit Download PDF

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Publication number
CN107265791A
CN107265791A CN201710684269.XA CN201710684269A CN107265791A CN 107265791 A CN107265791 A CN 107265791A CN 201710684269 A CN201710684269 A CN 201710684269A CN 107265791 A CN107265791 A CN 107265791A
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waste water
communicated
processing unit
kitchen garbage
zone
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唐清畅
蒋剑虹
罗友元
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China Machinery International Engineering Design and Research Institute Co Ltd
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China Machinery International Engineering Design and Research Institute Co Ltd
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Priority to CN201710684269.XA priority Critical patent/CN107265791A/en
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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
    • 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
    • C02F1/5281—Installations for water purification using chemical agents
    • 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
    • C—CHEMISTRY; METALLURGY
    • 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
    • C02F11/123—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using belt or band filters
    • C—CHEMISTRY; METALLURGY
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/14—NH3-N
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/16—Total nitrogen (tkN-N)
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/18—PO4-P
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/04—Flow arrangements
    • C02F2301/046—Recirculation with an external loop
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/14—Maintenance of water treatment installations
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00—Use of specific compounds during water treatment
    • C02F2305/02—Specific form of oxidant
    • C02F2305/026—Fenton's reagent
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/10—Packings; Fillings; Grids
    • C02F3/104—Granular carriers
    • 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
    • C02F3/301—Aerobic and anaerobic treatment in the same reactor

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)
  • Activated Sludge Processes (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

Kitchen garbage slurry fermentation waste water processing unit, is related to waste water and the wastewater produced processing unit of other processes after kitchen garbage slurry anaerobic digestion dehydration.Through oil removal preliminary sedimentation tank (1), regulating reservoir (2), A/O biochemical treatment apparatus (3), sedimentation basin (4), air-floating apparatus (5), Fenton reactor (6), coagulative precipitation tank (7), BAF (8) processing after waste water elder generation, COD, BOD in effectively removal waste water is met5, 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 processing5、NH3The pollutants such as N, TP, colourity can be stably reached《Integrated wastewater discharge standard》(GB8978 1996) " primary standard " requirement.

Description

Kitchen garbage slurry fermentation waste water processing unit
Technical field
The invention belongs to a kind of kitchen garbage slurry fermentation waste water processing unit, and in particular to a kind of kitchen garbage slurry is detested Waste water after oxygen digestion dehydration, and kitchen garbage handle the wastewater produced processing unit of other processes, belong to sewage disposal neck Domain.
Background technology
Waste water after kitchen garbage slurry anaerobic digestion dehydration, and kitchen garbage handle the waste water that other processes are produced, Waste component is complicated, the big high concentrated organic wastewater of category intractability.Pollutants in Wastewater concentration is high, COD (COD, 8000~20000mg/L), 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 (300~800 times).The hardly possible such as cellulose, protein, lipid in waste water is raw Thing degradation of organic substances matter institute accounting is big, its carbon-nitrogen ratio (BOD5:TKN it is) low, only 2:1~3:1, the carbon-nitrogen ratio of waste water is low to be unfavorable for Effective removal of total nitrogen.
Kitchen waste water processing is main at present to be used at anaerobic bio-treated, Aerobic biological process, advanced oxidation and membrane technology The processing unit of several or a variety of unit combinations such as reason.Waste water should reach after processing《Integrated wastewater discharge standard (GB8978- 1996)》In " grade III Standard " and《Sewage is discharged into town sewer water standard》GB/T 31962-2015) in " B grades " standard, Some areas also need to reach more strict《Integrated wastewater discharge standard》(GB8978-1996) " primary standard ".
Publication number CN106396282A document discloses a kind of " kitchen garbage slurry anaerobic fermentation wastewater treatment equipment ", The device includes oil removal preliminary sedimentation tank, regulating reservoir, the first pH regulating reservoirs, Ammonia blowing-out tower, the 2nd pH regulating reservoirs, A/O biochemical treatments dress Put, sedimentation basin, Fenton reactor, coagulative precipitation tank.Blown after waste water elder generation through oil removal preliminary sedimentation tank regulating reservoir, the first pH regulating reservoirs, ammonia De- tower, the 2nd pH regulating reservoirs, A/O biochemical treatment apparatus, sedimentation basin, Fenton reactor, coagulative precipitation tank are handled, and are being removed COD, BOD in waste water5, the pollutant such as SS while, can effectively remove TN, TP and effectively reduce chroma in waste water, and improve TN, TP COD, BOD in clearance, the waste water after processing5、TN、NH3The pollutants such as-N, TP, colourity can be stably reached《Integrated wastewater is arranged Put standard》(GB8978-1996) " grade III Standard " and《Sewage is discharged into town sewer water standard》(GB/T 31962-2015) " B grades " requirements, with better effects, but are unsatisfactory for《Integrated wastewater discharge standard》(GB8978-1996) " primary standard " will Ask.
There is one kind in the prior art by " pretreatment unit+anaerobic processing device+aerobic treatment device+reverse osmosis membrane mistake The processing unit that filter device " is formed by combining, its deficiency is that one is that Anaerobic Treatment unit operational management requirement is high, is especially detested Oxygen processing unit consumes the carbon source in waste water in the process of running, carbon-nitrogen ratio in waste water is further declined (COD, BOD5Reduction, Ammonia nitrogen is raised), the reduction of carbon-nitrogen ratio is less useful for the biological denitrificaion of waste water；Two be depth of the reverse osmosis membrane filtration device as end Degree processing, although can meet《Sewage is discharged into town sewer water standard》The requirement of " B grades " standard and《Integrated wastewater is arranged Put standard》(GB8978-1996) requirement of " primary standard ", its deficiency is that the grease in waste water is easily caused reverse osmosis membrane blocking, High salt branch in waste water accelerates the aging of reverse osmosis membrane, and reverse osmosis membrane service life is short, especially reverse osmosis membrane filtration device It is a kind of physical filtering device, simply the pollutant in waste water is retained, pollutant not degraded really, it is produced A large amount of concentrates need to separately carry out the processing of complex process, be easily caused secondary pollution, and operating cost is higher.
The content of the invention
In view of the shortcomings of the prior art, the present invention provides a kind of kitchen garbage slurry fermentation waste water processing unit, i.e. kitchen Waste water and the wastewater produced processing unit of other processes of kitchen garbage processing procedure after rubbish slurry anaerobic digestion dehydration, this Device can effectively remove TN, NH while the pollutant such as COD, BOD, SS in meeting effectively removal waste water3- N, TP and effectively Chroma in waste water is reduced, and improves TN, NH3COD, BOD in-N, TP clearance, the waste water after processing5、NH3- N, TP, colourity etc. Pollutant can be stably reached《Integrated wastewater discharge standard》(GB8978-1996) requirement of " primary standard ".
Technical scheme is as follows：
Referring to accompanying drawing, including oil removal preliminary sedimentation tank 1, regulating reservoir 2, A/O biochemical treatment apparatus 3, sedimentation basin 4, air-floating apparatus 5, Fenton reactor 6, coagulative precipitation tank 7, BAF 8；
Oil slick baffle plate 1a is arranged at the top of oil removal preliminary sedimentation tank 1, and mud chamber 1b is arranged at bottom, and sludge is arranged at the mud chamber 1b bottoms Outlet, the wastewater outlet of oil removal preliminary sedimentation tank 1 is communicated with the regulating reservoir 2；The oil removal preliminary sedimentation tank carries out oil removal to waste water, just sunk Processing, removes most suspended substances SS；
Waste water water, water quality are adjusted the regulating reservoir 2；
The A/O biochemical treatment apparatus 3 includes anoxic zone 3a and aerobic zone 3b, the anoxic zone 3a and aerobic zone 3b tops Communicate, the delivery port of the regulating reservoir 2 is communicated with the anoxic zone 3a of A/O biochemical treatment apparatus 3, A/O biochemical treatment apparatus 3 it is good Oxygen area 3b is communicated with the sedimentation basin 4；A/O biochemical treatment apparatus 3 to waste water carry out biochemical treatment, effectively remove most COD, BOD5、NH3- N, effectively removes TN, TP；
The bottom of sedimentation basin 4 has storage mud chamber 4a, storage mud chamber 4a bottoms to have sludge outlet；Waste water is precipitated through sedimentation basin 4 Processing, further removes SS and TP；
The air-floating apparatus 5 is provided with skimming mechanism 5a, scum trough 5b, dissolved gas agency 5c, air-floating apparatus 5 and the precipitation The delivery port on the top of pond 4 is communicated, and the inner chamber of air-floating apparatus 5 is communicated with coagulant dosage component, the delivery port of the bottom of air-floating apparatus 5 Communicated with the Fenton reactor 6；In operation, from coagulant dosage component into air-floating apparatus dosing coagulant, and and waste water Coagulation is carried out, dissolved gas agency 5c discharges pressure air-dissolving water into waste water, makes to produce substantial amounts of micro air bubble, micro air bubble in waste water It is attached on the suspended particle in waste water, suspension is kept afloat using buoyancy, so as to realize solid- liquid separation, removes useless Suspension, colloid pollutant in water, further remove the pollutants such as COD, TP, colourity；
Gas Stirring component 6a is provided with the Fenton reactor 6, the inner chamber of Fenton reactor 6 adds component and sweet smell with sulfuric acid The reagent that pauses adds component and communicated；Waste water is contacted in the Fenton reactor 6 under acid pH environment with Fenton reagent Reaction, waste water is handled through Fenton reactor, further COD, BOD in reduction waste water5, meanwhile, the coloured groups quilt in waste water Destruction, is that follow-up coagulative precipitation tank effectively reduces the colourity of waste water and created conditions；
The coagulative precipitation tank 7 includes coagulation area 7a and settling zone 7b, and coagulation area 7a is communicated with settling zone 7b tops, described Rabbling mechanism 7c is provided with coagulation area 7a, sludge bucket 7d is arranged at settling zone 7b bottoms, and mud mouth, coagulation area 7a are arranged at sludge bucket 7d bottoms Component is added with alkali to communicate, the wastewater outlet of the Fenton reactor 6 is communicated with the coagulation area 7a of coagulative precipitation tank 7, coagulation sinks The settling zone 7b tops delivery port in shallow lake pond 7 is communicated with the top of BAF 8；In operation, component is added to mixed from alkali Alkali is added in coagulation zone, and is mixed with waste water, pH value of waste water is adjusted to neutrality, waste water is under pH neutral environment, mixed Occur coagulating in the coagulation area 7a of solidifying sedimentation basin, form water insoluble iron hydroxide, ferric phosphate flco, remove in waste water Iron ion and TP, meanwhile, further remove waste water in COD, SS, colourity and other pollutants, at the coagulation area 7a Waste water after reason enters settling zone 7b, realizes that the supernatant in separation of solid and liquid, settling zone 7b enters BAF 8, sludge Sludge is discharged into the mud storage pool 9 set in addition by the mud mouth of its bottom in bucket 7d；
The intracavity bottom of BAF 8 is provided with aeration component 8a, and there are biological filter bed of material 8b, aeration and biological filter in middle part Delivery port is arranged at the bottom of pond 8；BAF 8 carries out biological and physical treatment to waste water, and waste water is fully contacted with microbial film, Organic matter in degrading waste water simultaneously carries out nitration denitrification denitrogenation, while carrying out the filtering and absorption of filtrate, further eliminates COD, BOD in waste water5、TN、NH3-N、SS；
Discharged wastewater met the national standard after the processing of BAF 8.
The invention has the characteristics that and technique effect：
1st, by a kind of described " heavy processing+regulating reservoir regulation+A/O biochemical treatment apparatus at the beginning of oil removal " wound of composition in the present invention New processing unit, i.e., first carry out oil removal precipitation process to processed waste water, then waste water be adjusted processing, with routine Processing, the rear mode ratio for carrying out oil removal precipitation process is first adjusted, grease can be avoided in the accumulation of the regulating reservoir water surface and big Grain impurity and suspension sink to regulating reservoir bottom of pond under gravity, it is to avoid the frequent cleaning of regulating reservoir, are conducive to improving and make Industry efficiency；During A/O biochemical treatment apparatus carries out biochemical treatment to waste water, in the aerobic zone of A/O biochemical treatment apparatus Microorganism in activated sludge can effectively carry out metabolism, by COD, BOD in waste water5Degraded, while in activated sludge Ammonium oxidation in waste water is nitrate nitrogen and cultured water, the denitrification in A/O biochemical treatment apparatus anoxic zone by nitrifier Bacterium consumes carbon source COD, BOD in waste water is removed5While, nitrate nitrogen and cultured water are converted into nitrogen, by nitrification- Anti-nitration reaction, realizes effective denitrogenation；Meanwhile, the polyP bacteria (microorganism) in activated sludge absorbs in metabolic processes Phosphorus, forms Quadrafos and is stored in described polyP bacteria (microorganism) in vivo, effectively removes the phosphorus in waste water.
2nd, the present invention follow-up " sedimentation basin+air-floating apparatus+Fenton reactor+coagulative precipitation tank+BAF " with The combination of aforementioned processing unit constitutes overall new departure that the present invention is handled waste water, and phase is obtained in aforementioned processing unit Answer on the basis of effective treatment effect, in the sedimentation basin processing of sedimentation basin, further eliminate the SS in waste water；In air supporting Colloid pollutant, COD, SS, TP are further eliminated in device, after waste water is handled through air-floating apparatus, the COD pollutions in water Thing, particularly macromolecular Recalcitrant chemicals obtain part removal, can reduce adding for Fenton reagent in follow-up Fenton reactor Amount, saves the cost of Fenton reagent；Fenton reactor reduce further COD, BOD in waste water5, the coloured groups in waste water It is destroyed, it is that follow-up coagulative precipitation tank effectively reduces the colourity of waste water and created conditions；It is in coagulative precipitation tank processing, Fenton is anti- Answer water outlet pH to adjust to neutrality, further remove COD, SS, colourity and other pollutants in waste water；In the life of BAF In thing and physical treatment step, COD, BOD are further removed5、TN、NH3- N, while removing the SS remained in waste water, makes through this hair COD, BOD in waste water after the reason of daylight5、NH3The pollutants such as-N, TP, colourity can be stably reached《Integrated wastewater discharge standard》 (GB8978-1996) requirement of " primary standard ".
3rd, the present invention " on the basis of publication number CN106396282A " technical scheme, is being additionally arranged in Fenton reactor front end " air-floating apparatus ", " coagulative precipitation tank ", " BAF " are additionally arranged in Fenton reactor rear end successively, that is, constitute the present invention The processing unit at the rear portion " air-floating apparatus+Fenton reactor+coagulative precipitation tank+BAF " of scheme so that through this hair COD, BOD in waste water after the reason of daylight5、NH3The pollutants such as-N, TP, colourity can be stably reached《Integrated wastewater discharge standard》 (GB8978-1996) requirement of " primary standard ", and the part set up can use prior art construction, it is stable, just In maintenance, it is possible to decrease operating cost, relative to existing " pretreatment+anaerobism+aerobic+advanced treating (reverse osmosis membrane filtration) " group Attach together and put, it is to avoid the combination unit is because of the deficiency existed using Anaerobic Treatment and membrane technology.
With reference to embodiment, the present invention is further described.
Brief description of the drawings
Accompanying drawing is the structural representation of the present invention.
Embodiment
Referring to accompanying drawing, using treatment scale as 100m3Exemplified by/d kitchen garbage, waste-water, embodiment is as follows：
Waste water and kitchen garbage after kitchen garbage slurry anaerobic digestion dehydration handle the waste water quality that other processes are produced： 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.
Referring to accompanying drawing, the present invention include oil removal preliminary sedimentation tank 1, regulating reservoir 2, A/O biochemical treatment apparatus 3, sedimentation basin 4, air supporting Device 5, Fenton reactor 6, coagulative precipitation tank 7, BAF 8；
Oil slick baffle plate 1a is arranged at the top of oil removal preliminary sedimentation tank 1, and mud chamber 1b is arranged at bottom, and sludge outlet is arranged at mud chamber bottom 1c, waste water enters oil removal preliminary sedimentation tank by waste pipe, and oil removal preliminary sedimentation tank carries out oil removal, just heavy processing to waste water, removes most of outstanding Float SS, the wastewater outlet of oil removal preliminary sedimentation tank 1 is communicated with regulating reservoir 2；In operation, the oil slick baffle plate exclude float in freedom it is useless The oil slick of layer waterborne, the oil slick of retention is periodically removed using corresponding device, and the large granular impurity and bulky grain in waste water suspend Thing is deposited in the mud chamber of oil removal preliminary sedimentation tank bottom under gravity, the sludge of precipitation by mud chamber 1b bottoms sludge 1c discharges are exported, most suspended substances SS removal is realized；In specific implementation, the sludge discharged by mud chamber 1b enters to be set in addition In the mud storage pool 12 put；The wastewater outlet of the oil removal preliminary sedimentation tank 1 is connected with regulating reservoir 2 by pipe fitting or pocket member.
Water, the water quality of waste water are adjusted the regulating reservoir 2, in favor of the stable operation of subsequent treatment process, real Sewage pump 2a is set in Shi Zhong, regulating reservoir 2, and elevator pump 2a delivery port passes through in pipe fitting and A/O biochemical devices 3 Anoxic zone 3a is communicated；
The oil removal preliminary sedimentation tank and regulating reservoir can use armored concrete pond body or carbon steel anticorrosion equipment pond body, this example Oil removal preliminary sedimentation tank size：5m × 2m × 3m (depth), regulating reservoir dischargeable capacity 100m3。
After being handled through oil removal preliminary sedimentation tank 1 and regulating reservoir 2, SS ＜ 2000mg/L, vegetable and animals oils the ＜ 300mg/L of waste water.
Include in the A/O biochemical treatment apparatus 3 on anoxic zone 3a and aerobic zone 3b, the anoxic zone 3a and aerobic zone 3b Portion is communicated, and the aerobic zone 3b in A/O biochemical treatment apparatus 3 is communicated with the sedimentation basin 4；A/O biochemical treatment apparatus 3 enters to waste water Row biochemical treatment, effectively removes most COD, BOD5、NH3- N, effectively removes TN, TP；In implementation, in the A/O biochemical treatments In device 3, provided with the muddy water mixed solution in the aerobic zone 3b is flowed back in the backflow pipe fitting 3c in the 3a of anoxic zone, flow back pipe fitting 3c is provided with the first reflux pump 3d, and the muddy water mixed solution in the 3b of aerobic zone is flowed back in the anoxic zone 3a by backflow member 3c, Formed " interior backflow ", reflux ratio is that the internal reflux ratio in 200%~500%, this example is 300%~400%.In operation, A/O lifes Microorganism in change processing unit 3 aerobic zone 3b (dissolved oxygen is 1.5~2.5mg/L) interior activated sludge can effectively carry out new old It is metabolized (activated sludge concentration MLSS, 3.5~4.5g/L), by COD, BOD in waste water5Degraded, effectively removal most COD, BOD5, while the ammonium oxidation in waste water is at nitrate nitrogen and cultured water, A/O biochemistry by the nitrobacteria in activated sludge Manage the denitrifying bacterium consumption carbon source in the anoxic zone 3a of device 3 (dissolved oxygen is 0.2~0.5mg/L) COD, BOD in waste water is removed5 While, nitrate nitrogen and cultured water are converted into nitrogen, NH is further removed3- N, TN, by nitrification-denitrification reaction, Effective denitrogenation is realized, meanwhile, the polyP bacteria (microorganism) in activated sludge absorbs phosphorus in metabolic processes, forms polyphosphoric acid Salt is stored in described polyP bacteria (microorganism) in vivo, effectively removes the phosphorus (biological phosphate-eliminating) in waste water；Waste water is given birth in the A/O It is 10~20 days, wherein anoxic zone 4~6 days, aerobic zone 6~15 days, this example to change the total hrt in processing unit 3 In, total hrt is 17 days, wherein anoxic zone 4 days, aerobic zone 13 days；In operation, the A/O biochemical treatment apparatus 3 The temperature control of interior muddy water mixed solution is controlled at 20~35 DEG C, in this example at 25~35 DEG C；In this example, the A/O biochemical treatments Device is the anaerobic-aerobic activated sludge process dirt of existing anaerobic-aerobic activated sludge process sewage-treatment plant or existing structure Water treating pond, is made up of, size is 20m anoxic zone, aerobic zone and backflow member, valve, pipeline, rabbling mechanism, aeration mechanism etc. × 20m × 5m (depth), water outlet COD ＜ 700mg/L, BOD after being handled through A/O biochemical treatment apparatus5＜ 200mg/L, NH3- N ＜ 30mg/L；In operation, when the temperature of muddy water mixed solution in the A/O biochemical treatment apparatus 3 is less than 20 DEG C, set the A/ Muddy water mixed solution temperature rises to 20~35 DEG C of heater in O biochemical treatment apparatus 3, such as：Using direct-fired electrical heating Device uses the heaters such as heat-exchange device, when muddy water mixed solution temperature is higher than 35 DEG C in the A/O biochemical treatment apparatus 3 When, muddy water mixed solution temperature in the A/O biochemical treatment apparatus 3 is down to 20~35 DEG C of cooling device by setting, such as using cold But the device such as device or cooling tower.
The bottom of sedimentation basin 4 has storage mud chamber 4a, storage mud chamber 4a bottoms to have sludge outlet, and waste water is through sedimentation basin place of settling Reason, further removes the SS and TP in waste water, and the delivery port on the top of sedimentation basin 4 is communicated with the waste water inlet of the air-floating apparatus 5； In implementation, flowed back provided with the bottom of sedimentation basin 4 is store into the partial sludge mixture in mud chamber 4a in A/O biochemical treatment apparatus Return duct 4b in the 3a of anoxic zone, return duct 4b are provided with the portion in the second reflux pump 4c, the bottom of the sedimentation basin 4 storage mud chamber 4a In the anoxic zone 4a that point mud mixture flows back in A/O biochemical treatment apparatus, reflux ratio is 50~100%, for maintaining A/O The activated sludge concentration of biochemical treatment apparatus；In operation, waste water realizes mud-water separation in sedimentation basin 4, further remove SS, TP；Waste water SS ＜ 100mg/L, TP ＜ 30mg/L after being handled through sedimentation basin.In specific implementation, the residue in the storage mud chamber 4a Sludge is discharged into the mud storage pool 9 set in addition.
The air-floating apparatus 5 is provided with skimming mechanism 5a, scum trough 5b, dissolved gas agency 5c, the air-floating apparatus 5 with it is described The delivery port and coagulant dosage component on the top of sedimentation basin 4 are communicated, delivery port and the Fenton's reaction of the bottom of air-floating apparatus 5 Device 6 is communicated；In operation, from coagulant dosage component into air-floating apparatus dosing coagulant, and with waste water carry out coagulation, molten mechanism of qi Structure 5c discharges pressure air-dissolving water into waste water, makes to produce substantial amounts of micro air bubble in waste water, micro air bubble is attached in waste water On suspended particle, suspension is kept afloat using buoyancy, so as to realize solid- liquid separation, remove suspension, glue in waste water Body pollutant, further removes the pollutants such as COD, TP, colourity；The scum silica frost kept afloat is skimmed into scum silica frost by skimming mechanism 5a In groove 5b, scum silica frost is discharged into the mud storage pool 9 set in addition, and the waste water after being handled through the air-floating apparatus 5 is from the bottom of air-floating apparatus 5 It is discharged into Fenton reactor 6；Coagulant can be using molysite, aluminium salt or high polymer coagulant etc.；In this example, air-floating apparatus is existing knot The flat flow dissolved gas floatator of structure, trivalent iron salt is added by pipe-line mixer component in the water inlet pipe of the air-floating apparatus 5 As coagulant, waste water is 15min, the water outlet COD ＜ after being handled through air-floating apparatus 5 in the residence time of air-floating apparatus 5 300mg/L, BOD550 times of ＜ 150mg/L, TP ＜ 6mg/L, SS ＜ 50mg/L, colourity ＜.
Gas Stirring component 6a is provided with the Fenton reactor 6, the inner chamber of Fenton reactor 6 adds component and sweet smell with sulfuric acid The reagent that pauses adds component and communicated；Waste water is contacted in the Fenton reactor 6 under acid pH environment with Fenton reagent Reaction, further reduces COD, BOD in waste water5, the coloured groups in waste water are destroyed, and are that follow-up coagulative precipitation tank effectively drops The colourity of low waste water creates conditions；In operation, component is added into the water inlet pipe of Fenton reactor 6 by sulfuric acid and adds sulfuric acid, The pH value of waste water entered in Fenton reactor 6 is adjusted to acidity, tried into the waste water in Fenton reactor 6 and the Fenton added Agent carries out the organic pollutant of the difficult for biological degradation in haptoreaction, waste water in the strong of Fenton reagent under acid ph value environment It is oxidized under oxidation, macromolecular is changed into small molecule, it is easy to biochemical degradation, the biodegradability of waste water is improved, while part has Machine thing is inorganic matter by exhaustive oxidation, further COD, BOD in reduction waste water5, meanwhile, the coloured groups in waste water are broken It is bad, it is that the colourity of follow-up coagulative precipitation tank processing effectively reduction waste water creates conditions；Fenton reactor is existing, and waste water is in sweet smell Reaction time (hydraulic detention time) in reactor 6 is 1~2 hour, hydrogen peroxide and ferrous ion in Fenton reagent Mol ratio is 1~3:1, the dosage of the Fenton reagent COD concentration in water inlet is determined.In this example：Fenton reactor size is φ 2m × 3m, reaction time (hydraulic detention time) of the waste water in Fenton reactor 6 is about 1.5 hours, is mixed by pipeline Device adds sulfuric acid, sets pH value Detection ＆ Controling instrument to automatically control dosage, the pH value of waste water is adjusted into 3~5, the sweet smell added The mol ratio of hydrogen peroxide and ferrous ion is 1.5 in reagent:1.Water outlet COD ＜ after being handled through Fenton reactor 6 200mg/L, BOD5＜ 50mg/L.
The coagulative precipitation tank 7 includes coagulation area 7a and settling zone 7b, and coagulation area 7a is communicated with settling zone 7b tops, described The wastewater outlet of Fenton reactor 7 is communicated with the coagulation area 7a of coagulative precipitation tank 7, and the settling zone 7b tops of coagulative precipitation tank 7 go out The mouth of a river is communicated with the top of BAF 8, agitating member 7c is provided with coagulation area 7a, sludge bucket is arranged at settling zone 7b bottoms 7d, sludge bucket 7d bottom have mud mouth 7e, coagulation area 7a to add component with alkali and communicate；Waste water is mixed under pH neutral environment Retrogradation is formed sediment, and removes iron ion and TP in waste water, further removes COD, SS, colourity and other pollutants in waste water, and right Waste water realizes separation of solid and liquid；In operation, alkali is added into the waste water for entering coagulation area 7a, the pH value of waste water is adjusted to neutrality, In coagulation area coagulation process occurs for the iron ion in waste water in neutral conditions, forms water insoluble iron hydroxide, ferric phosphate Flco, removes the iron ion and TP in waste water, while flocculation can further remove COD in waste water, SS, colourity and other Pollutant；Waste water after being handled through the coagulation area 7a enters described settling zone 7b, realizes in separation of solid and liquid, settling zone 7b Supernatant enters BAF 8；Alkali can be using sodium hydroxide, calcium oxide, calcium hydroxide etc.；In this example, coagulative precipitation tank 7 For the coagulative precipitation tank of existing structure, the species of alkali is added in the water inlet pipe of the coagulation area 7a by pipe-line mixer component For NaOH, set pH value Detection ＆ Controling instrument to automatically control the dosage of aqueous slkali, the pH value of waste water for entering coagulation area 7a is adjusted Section is neutral to 7~8, in embodiment, and waste water reaction time in the coagulation area 7a of coagulative precipitation tank 7 is 20min, the precipitation Tube settling component is provided with area 7b, waste water is 1m in settling zone 7b hydraulic surface loading3/m2.h.At coagulative precipitation tank 7 Water outlet after reason, COD ＜ 150mg/L, BOD540 times of ＜ 50mg/L, TP ＜ 0.5mg/L, SS ＜ 50mg/L, colourity ＜, is deposited in Sludge is discharged into the mud storage pool 9 set in addition in the sludge bucket 7d.
The intracavity bottom of BAF 8 is provided with aeration component 8a, and there are biological filter bed of material 8b, aeration and biological filter in middle part Delivery port is arranged at the bottom of pond 8；BAF 8 carries out biological and physical treatment to waste water, and waste water is fully contacted with microbial film, Organic matter in degrading waste water simultaneously carries out nitration denitrification denitrogenation, while carrying out the filtering and absorption of filtrate, further eliminates COD, BOD in waste water5、TN、NH3-N、SS；Biological filter bed of material 8b filtrate can using ceramic grain filter, granular activated carbon filtrate or Other similar filtrates；In operation, aeration component provides air by compressed air source unit and is aerated；In this example, BAF 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 high In 5mg/L, BAF is periodically backwashed using its water outlet.Water outlet after being handled through BAF, COD ＜ 100mg/L, BOD5＜ 20mg/L, TP ＜ 0.5mg/L, NH3- N ＜ 10mg/L, vegetable and animals oils ＜ 10mg/L, SS ＜ 40mg/L, color Spend 40 times of ＜.
Discharged wastewater met the national standard after the processing of BAF 8；When needing, sterilization pool is set, the sterilization pool Water inlet is communicated with the delivery port of the bottom of BAF 8, and the waste water after the processing of BAF 8 then enters described Sterilization pool is discharged after disinfecting；The present embodiment sets sterilization pool, and the waste water after the processing of BAF 8 enters the sterilization Discharged after the sterilization of pond, disinfectant can be using chlorine dioxide, ozone, bleaching powder etc., and embodiment is used as disinfectant using chlorine dioxide.
In specific implementation, separately disposed after device for dehydrating sladge waste processing of the sludge through setting in addition in mud storage pool 9；Sludge Dehydration equipment can be using centrifugal dehydrator or belt type dewaterer etc., the sludge outward transport after dehydration.
After waste water is handled through apparatus of the present invention, pollutant concentration value and pollutants removal rate are as follows：
Go out water pollutant index to reach《Integrated wastewater discharge standard (GB8978-1996)》In " primary standard ".

Claims (6)

1. kitchen garbage slurry fermentation waste water processing unit, it is characterized in that：
Including oil removal preliminary sedimentation tank (1), regulating reservoir (2), it is A/O biochemical treatment apparatus (3), sedimentation basin (4), air-floating apparatus (5), fragrant Pause reactor (6), coagulative precipitation tank (7), BAF (8)；
Oil slick baffle plate (1a) is arranged at oil removal preliminary sedimentation tank (1) top, and mud chamber (1b) is arranged at bottom, and mud chamber (1b) bottom has Sludge outlet, the wastewater outlet of oil removal preliminary sedimentation tank (1) is communicated with the regulating reservoir (2)；
Waste water water, water quality are adjusted the regulating reservoir (2)；
The A/O biochemical treatment apparatus (3) includes anoxic zone (3a) and aerobic zone (3b), on anoxic zone (3a) and aerobic zone (3b) Portion is communicated, and the delivery port of the regulating reservoir (2) is communicated with the anoxic zone (3a) of A/O biochemical treatment apparatus (3), A/O biochemical treatments The aerobic zone 3b of device (3) is communicated with the sedimentation basin (4)；
Storage mud chamber (4a) is arranged at sedimentation basin (4) bottom, and sludge outlet is arranged at storage mud chamber (4a) bottom；
The air-floating apparatus (5) is provided with skimming mechanism (5a), scum trough (5b), dissolved gas agency (5c), air-floating apparatus (5) and institute The delivery port for stating sedimentation basin (4) top is communicated, and the inner chamber of air-floating apparatus (5) is communicated with coagulant dosage component, air-floating apparatus (5) The delivery port of bottom is communicated with the Fenton reactor (6)；
Be provided with Gas Stirring component (6a) in the Fenton reactor (6), Fenton reactor (6) inner chamber and sulfuric acid add component and Fenton reagent adds component and communicated；
The coagulative precipitation tank (7) includes coagulation area (7a) and settling zone (7b), coagulation area (7a) and settling zone (7b) top phase It is logical, rabbling mechanism (7c) is provided with the coagulation area (7a), sludge bucket (7d), sludge bucket (7d) bottom are arranged at settling zone (7b) bottom There is mud mouth, coagulation area (7a) adds component with alkali and communicated, the wastewater outlet and coagulative precipitation tank of the Fenton reactor (6) (7) coagulation area (7a) is communicated, settling zone (7b) top delivery port and the BAF (8) of coagulative precipitation tank (7) Top is communicated；
BAF (8) intracavity bottom is provided with aeration component (8a), and there are the biological filter bed of material (8b), aeration and biological in middle part Delivery port is arranged at filter tank (8) bottom；
Discharged wastewater met the national standard after BAF (8) processing.
2. according to the kitchen garbage slurry fermentation waste water processing unit described in claim 1, it is characterized in that：Sterilization pool, institute are set The water inlet and the delivery port with the BAF (8) bottom for stating sterilization pool are communicated.
3. according to the kitchen garbage slurry fermentation waste water processing unit described in claim 1 or 2, it is characterized in that：In described A/O In biochemical treatment apparatus (3), provided with the muddy water mixed solution in the aerobic zone (3b) is flowed back in anoxic zone (3a) return duct Part (3c), backflow pipe fitting (3c) is provided with the first reflux pump (3d).
4. according to the kitchen garbage slurry fermentation waste water processing unit described in claim 1 or 2, it is characterized in that：Provided with by described in Time that the partial sludge mixture of sedimentation basin (4) bottom storage mud intracavitary flows back in A/O biochemical treatment apparatus in anoxic zone (3a) Flow tube (4b), return duct (4b) is provided with the second reflux pump (4c).
5. according to the kitchen garbage slurry fermentation waste water processing unit described in claim 1 or 2, it is characterized in that：When A/O lifes When changing processing unit (3) interior muddy water mixed solution temperature less than 20 DEG C, provided with the interior muddy water of the A/O biochemical treatment apparatus (3) is mixed Close the heater that liquid temperature degree rises to 20~35 DEG C.
6. according to the kitchen garbage slurry fermentation waste water processing unit described in claim 1 or 2, it is characterized in that：When A/O lifes When changing processing unit (3) interior muddy water mixed solution temperature higher than 35 DEG C, provided with the interior muddy water of the A/O biochemical treatment apparatus (3) is mixed Close the cooling device that liquid temperature degree is down to 20~35 DEG C.
CN201710684269.XA 2017-08-11 2017-08-11 Kitchen garbage slurry fermentation waste water processing unit Pending CN107265791A (en)

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CN113105996A (en) * 2021-03-10 2021-07-13 长沙工研院环保有限公司 Hydraulic and pneumatic linkage flotation kitchen waste anaerobic fermentation treatment system
CN114133101A (en) * 2021-11-08 2022-03-04 中机国际工程设计研究院有限责任公司 Kitchen garbage effluent disposal system
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Application publication date: 20171020