CN105884128A - Nickel-containing wastewater treating system and method - Google Patents
Nickel-containing wastewater treating system and method Download PDFInfo
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- CN105884128A CN105884128A CN201610218084.5A CN201610218084A CN105884128A CN 105884128 A CN105884128 A CN 105884128A CN 201610218084 A CN201610218084 A CN 201610218084A CN 105884128 A CN105884128 A CN 105884128A
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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
- C02F1/40—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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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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
- C02F1/52—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
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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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
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
- C02F1/62—Heavy metal 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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
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Abstract
The invention discloses a nickel-containing wastewater treating system. The nickel-containing wastewater treating system comprises a chemical reaction system, a membrane chemical reaction pool and a biochemical reaction system. A partition wall (17) is arranged in the membrane chemical reaction pool, the membrane chemical reaction pool is divided by the partition wall into a precipitation intensifying chamber (12) and a membrane reaction chamber (13), a channel for being communicated with the membrane reaction chamber and the precipitation intensifying chamber and a supernatant-liquid overflow groove (18) are formed in the partition wall; wastewater is treated through the chemical reaction system to enter the membrane reaction chamber (13) from the precipitation intensifying chamber (12), and treated through the precipitation intensifying chamber and the membrane reaction chamber to be discharged through the membrane reaction chamber, wherein the wastewater is flocculated and precipitated through the precipitation intensifying chamber, and the wastewater is subjected to solid-liquid separation through the membrane reaction chamber; the membrane reaction chamber comprises a membrane assembly, the membrane assembly comprises a flat plate membrane and a supporting frame, depth solid-liquid separation is carried out through the flat plate membrane, and discharged water enters the biochemical reaction system to be discharged in a standard mode.
Description
Technical field
The present invention relates to water treatment technology, particularly relate to a kind of industrial wastewater treatment system using embrane method to combine physics, chemistry and biological method and processing method thereof.
Background technology
Along with country or enterprise to environmental protection and economize on resources wait demand, dirt (giving up) water process become increasingly to be paid attention to by masses.The most effective and feasible sewage disposal generally uses bioremediation.Such as, traditional biological treatment uses secondary sedimentation tank to process sewage.But, when carrying out sewage disposal, sewage is after biochemical reaction, in addition it is also necessary to just can discharge after secondary sedimentation tank precipitates, the process causing sewage disposal is longer.It addition, use the process technique floor space of secondary sedimentation tank greatly, cost of investment is high.Especially when run mud age higher time, this can cause bad sludge settling.Therefore, this processing system and technique be not suitable for densely populated region.
In recent years, membrane bioreactor (Membrane Bioreactor is called for short MBR) technology is increasingly becoming main flow and processes technique.The process characteristic of MBR is the biodegradation process of activated sludge to be combined with the solid-liquid separation of film, replaces the precipitation of routine, filtering technique, and makes the water quality after process directly reach the level of (being better than) discharge standard.Membrane bioreactor has many clear superiorities, the advantage such as such as have system treatment effeciency height, High Load Rate, floor space are little, ` displacement mass high and mud end-product amount is low.
Typical membrane bioreactor includes membrane module and bioreactor, substantial amounts of microorganism (activated sludge) is fully contacted with substrate (labile organic compound etc. in waste water) in membrane bioreactor, metabolism is carried out to maintain growth by oxygenolysis, breeding, make organic pollutant degradation simultaneously, membrane module passes through mechanical grading, the effect such as retain carries out solid-liquid separation to waste water and mud mixed liquid, biological treatment system and the combination of membrane module, not only increase the effluent quality of system and the stability of operation, also extend macromolecular substances hydraulic detention time in bioreactor, it is allowed to be degraded to greatest extent, and strengthen the system removal effect to hard-degraded substance.
According to the relative position of membrane module with bioreactor, MBR mainly has two kinds of configurations: immersion and AC system (sometimes referred to as side stream type or separated type).AC system membrane reactor is mainly used in the process of industrial wastewater, it is easy to the cleaning of film and replacing, but power consumption is higher.Compared with AC system membrane reactor, the maximum feature of submerged membrane reactor is that operation energy consumption is low, and has the advantages such as compact conformation, volume are little, and can be used for large-scale sewage treatment plant, and this is also that submerged membrane reactor is able to wide variety of reason.Great majority use immersion MBR the most in the world.
Film in traditional membrane module uses microfiltration/ultrafilter membrane, and the aperture of microfiltration is about 0.1 micron, and the aperture of ultrafilter membrane is about between 0.001-0.01 micron.Owing to microfiltration/ultrafilter membrane aperture is less, can effectively stop antibacterial, virus etc., to promote effluent quality such that it is able to play sterilization, remove the effect of microorganism caused a disease.But the cost of investment of this kind of microfiltration/hyperfiltration membrane assembly is high and energy consumption is relatively big, this limits it and obtains using more widely.Therefore, occurring non-woven fabrics or nonwoven fabric that the use of gross porosity film, such as synthetic fibers make later, this film mainly utilizes secondary filtration layer, i.e. lengthening, along with the membrane filtration time, the deposit formed on its surface, this secondary filtration layer realizes the actually active filtering function of film.But, generally, along with increasing biomass deposition is in film surface, this secondary filtration layer can become increasingly thicker, ultimately results in film and blocks.
Summary of the invention
In view of this, it is necessary to provide a kind of take up an area province, efficiency is high, can realize the nickel-containing waste water processing system of qualified discharge.
And a kind of method of wastewater treatment using above-mentioned nickel-containing waste water processing system is provided.
A kind of nickel-containing waste water processing system, comprising: chemical reaction system, film chemical reaction pond and Biochemistry Reaction System, wherein, described film chemical reaction pond is provided with partition wall (17), film chemical reaction pond is divided into reinforced deposition room (12) and film reaction room (13) by described partition wall, described partition wall offers the passage connecting described film reaction room with reinforced deposition room, and supernatant overflow launder (18)；Wherein, sewage is by chemical reaction system after treatment, film reaction room (13) is entered by described reinforced deposition room (12), discharged by film reaction room after reinforced deposition room and film reaction room process, wherein, described reinforced deposition room carries out flocculation sediment process to sewage, and described film reaction room is for carrying out solid-liquid separation to sewage；Described film reaction room includes that membrane module, described membrane module include Flat Membrane and support frame, and through the degree of depth solid-liquid separation of described Flat Membrane, water outlet enters Biochemistry Reaction System then qualified discharge.
Preferably, described chemical reaction system carries out dosing flocculation to sewage, the waste water of flocculation enters reinforced deposition room (12), sufficiently flocculated the time with precipitation under conditions of substantially there is no waterpower agitation, and the floccule body of postprecipitation forms high concentration nickel-containing sludge, through being located at the sloping plate sludge collecting tank (14) of bottom, reinforced deposition room (12), periodically discharge outside reinforced deposition room (12).
Preferably, supernatant (15) enters in film reaction room (13) by described overflow launder (18), film chemical reaction pond (11) is discharged by the plate film assembly (132) being located in film reaction room (13), enter biological treatment system and carry out the process of follow-up denitrogenation and organics removal
Preferably, when described supernatant (15) enters film reaction room (13) by the overflow launder (18) being located on partition wall (17), part mud mixture (16) can enter film reaction room (13) by the interval at the bottom of partition wall (17) and pond, to ensure the sludge concentration that normally works of membrane module (132).
Preferably, also set up an air diffuser (134), it is positioned at the bottom position of membrane module (132), and connect an aerator (136), for aeration in film reaction room (13) continuously, to maintain the properly functioning of film, it is effectively improved membrane flux, prevention film blocking.
A kind of nickel-containing waste water processing method, uses the method that physics, chemistry are combined with biofacies, and the method comprises the following steps:
Initially entering in regulating reservoir in physics, the chemical method removal of oil and grease waste water with chromium, regulate pH value, prevention influent quality changes suddenly；
The water outlet of regulating reservoir subsequently enters dosing flocculation basin and reaction tank, secondary, oxidation of phosphite becomes under the sodium hypochlorite effect with ferrous ion phosphate, thus flocculates into bigger granule precipitation；
Waste water after flocculation enters dosing flocculation basin and adds alkali and aluminium polychlorid thus by the nickel ion flocculation sediment in waste water；
The reinforced deposition room that waste water after flocculation sediment again enters in film chemical reaction pond fully carries out flocculation and precipitates, and the chemical sludge of precipitation discharges film chemical reaction pond by the sloping plate deposition groove under reinforced deposition room；
Supernatant after flocculation sediment enters film reaction room by reinforced deposition room overflow launder, realizes solid-liquid separation by the flat micro-filtration being fitted into, thus obtains comprising only the water outlet of micro-nickel；
After film reaction room processes, waste water enters biological treatment system and removes COD and total nitrogen, thus realizes qualified discharge.
Preferably, described air diffuser carries out aeration continuously and quantitatively to film reaction indoor, and described aeration rate is less than 10 times of the process water yield.
Preferably, after sewage disposal, COD concentration is at below 80mg/L, and total nickel concentration is at 0.3mg/L, and total nitrogen concentration is at below 15mg/L, and total phosphorus concentration is at below 1mg/L, it is possible to achieve the qualified discharge of nickel-containing waste water.
Compared with prior art, described nickel-containing waste water processing system and method pass through enhanced flocculation and sedimentation function and the high efficient solid and liquid separation function of film chemical reaction pond, when carrying out waste water and processing, film chemical reaction pond can substitute sedimentation tank completely, and relatively traditional handicraft saving occupation of land more than 50%, membrane module aeration intensity is low simultaneously, and relatively conventional film technique saves energy consumption；And, film is not easily formed obstruction, thus saves operating cost.On this basis, the removal efficiency of nickel can be improved, make discharged wastewater met the national standard.
Accompanying drawing explanation
Fig. 1 is the Waste Water Treatment flow chart of the embodiment of the present invention.
Fig. 2 is the film chemical reaction pond structural representation of the embodiment of the present invention.
Fig. 3 is to process the water yield day in the nickel-containing waste water processing method running of the embodiment of the present invention with membrane flux (flux) with running time changing curve figure.
Fig. 4 be the embodiment of the present invention nickel-containing waste water processing method running in film chemical reaction pond water outlet pH value with run time changing curve figure.
Fig. 5 is water inlet in the nickel-containing waste water processing method running of the embodiment of the present invention with the total nickel concentration in water outlet and total nickel removal efficiency with running time changing curve figure.
Fig. 6 be the embodiment of the present invention nickel-containing waste water processing method running in film chemical reaction pond water inlet and water outlet in total phosphorus concentration and total phosphorus removal efficiency with running time changing curve figure.
Fig. 7 be the embodiment of the present invention nickel-containing waste water processing method running in film chemical reaction pond water inlet and water outlet in COD (COD) and COD removal efficiency with running time changing curve figure.
Fig. 8 is water inlet in the nickel-containing waste water processing method running of the embodiment of the present invention with the total chromium concn in water outlet and total chromium removal efficiency with running time changing curve figure.
Fig. 9 be the embodiment of the present invention nickel-containing waste water processing method running in the saturating pressure of film (TMP) with run time changing curve figure.
Figure 10 is water inlet in the nickel-containing waste water processing method running of the embodiment of the present invention with the total phosphorus concentration in water outlet and total phosphorus removal efficiency with running time changing curve figure.
Figure 11 is water inlet in the nickel-containing waste water processing method running of the embodiment of the present invention with the COD (COD) in water outlet and COD removal efficiency with running time changing curve figure.
Figure 12 is water inlet in the nickel-containing waste water processing method running of the embodiment of the present invention with the total nitrogen in water outlet and total nitrogen removal efficiency with running time changing curve figure.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Refer to Fig. 1, the nickel-containing waste water processing system of the embodiment of the present invention include the regulating reservoir being sequentially communicated, dosing flocculation basin, reaction tank, dosing flocculation basin, in be provided with the film chemical reaction pond of partition wall and the physics of early stage, chemical processing system processes oily waste water and chromate waste water, follow-up biological treatment system.
Refer to Fig. 2, core in the present embodiment is provided with the film chemical reaction pond 11 of partition wall 17 in being, the reinforced deposition room 12 being provided with in the film chemical reaction pond 11 of partition wall 17 in the waste water of dosing flocculation basin flocculation initially enters, sufficiently flocculated the time with precipitation under conditions of substantially there is no waterpower agitation, and the floccule body of postprecipitation forms mud, discharge membrane chemical reactor 11 through sloping plate sludge collecting tank 14.It addition, supernatant 15 enters in film reaction room 13 by the overflow launder 18 being located on partition wall 17, discharge film chemical reaction pond 11 by the plate film assembly 132 being located in film reaction room 13, enter biological treatment system and carry out the process of follow-up denitrogenation and organics removal.
Specifically, reinforced deposition room 12 can be that the flocculation of system provides more sufficient flocculation and sedimentation time, bottom reinforced deposition room 12, it is provided with sloping plate sludge collecting tank 14 simultaneously, can the floccule body that precipitates of more efficient collection, form high concentration nickel-containing sludge, periodically discharge outside reinforced deposition room 12.Meanwhile, supernatant 15 enters in film reaction room 13 by the overflow launder 18 being located on partition wall 17, and part mud mixture 16 can enter film reaction room 13 by the interval at the bottom of partition wall 17 and pond, to ensure the sludge concentration that normally works of membrane module 132.Air diffuser 134 is connected with an aerator 136, air diffuser 134 is positioned at the bottom position of membrane module 132, for aeration in film reaction room 13 continuously, sufficiently mixing is provided, and carrying out efficient solid-liquid separation by plate film assembly 132, it is ensured that entrance biological treatment system carries out the waste water of subsequent treatment and has relatively low metal contaminant levels.
Wherein, the existence of film chemical reaction pond 11 can substitute sedimentation tank completely, provides more preferable solid-liquid separation effect in shorter hydraulic detention time, due to shorter hydraulic detention time, can save the occupation of land of whole sedimentation tank, accounts for more than the 50% of total system occupation of land.
nullWith continued reference to Fig. 1 and Fig. 2，The processing method of the processing system in the present embodiment introduced below，Comprise the following steps: (1) is through physics、Chemical method removal of oil and grease initially enters in regulating reservoir in the waste water of chromium，Regulation pH value，Prevention influent quality changes suddenly，(2) water outlet of regulating reservoir subsequently enters dosing flocculation basin and reaction tank，Will be secondary under the sodium hypochlorite effect with ferrous ion、Oxidation of phosphite becomes phosphate，Thus flocculate into bigger granule precipitation，(3) the waste water entrance dosing flocculation basin after flocculation adds alkali and aluminium polychlorid thus by the nickel ion flocculation sediment in waste water，(4) the reinforced deposition room during the waste water after flocculation sediment again enters film chemical reaction pond fully carries out flocculation and precipitates，The chemical sludge of precipitation discharges film chemical reaction pond by the sloping plate deposition groove under reinforced deposition room，(5) supernatant after flocculation sediment enters film reaction room by reinforced deposition room overflow launder，Solid-liquid separation is realized by the flat micro-filtration being fitted into，Thus obtain comprising only the water outlet of micro-nickel，(6) after film reaction room processes，Waste water enters biological treatment system and removes COD and total nitrogen，Thus realize qualified discharge.
In processing procedure, the existence of film chemical reaction pond 11 can substitute sedimentation tank completely, provides more preferable solid-liquid separation effect, due to shorter hydraulic detention time in shorter hydraulic detention time, the occupation of land of whole sedimentation tank can be saved, account for more than the 50% of total system occupation of land.Further, since film chemical reaction pond 11 is separated into two different parts by partition wall 17 so that air diffuser 134 can aeration more efficiently, thus effectively prevention film blocking.The process technique of the present embodiment is run more than 4 months continuously, the saturating pressure of film (Transmembrane Pressures, referred to as TMP) remaining relatively low all the time, thus can reduce cost.
Below as a example by the nickel-containing waste water treatment plant of actual motion,
Below with a pilot scale biological reaction pool example, the dischargeable capacity of this biological reaction pool is 1.5 cubic metres, operating condition is: hydraulic detention time is 6 hours, solid retention time is 15-50 days, mixed liquor suspended solid, MLSS (Mixed Liquor Suspended Solids, referred to as MLSS) concentration is 2000-4000mg/L.In pilot process, carry out the test of following various operating parameter.
1. the membrane flux of sewage: membrane flux is the biggest, the disposal ability of technique is the biggest, and cost is the lowest.The present embodiment is respectively with 1m3/m2D (cubic meter/square metre sky), 2m3/m2·d、3m3/m2D and 4m3/m2Tetra-kinds of membrane fluxs of d are as subjects, and keep mixed genetic-neural network to be 4500mg/L in the stabilization sub stage, and membrane area is constant, obtains a result such as following table:
Operating characteristics parameter under the different membrane flux of table 1
Generally F/M is the biggest, and HRT is the least shows that the treatment effeciency of system is the highest, and the membrane flux of common MBR is only 0.2-0.5.Thus, this table shows, native system is under conditions of higher membrane flux, and when membrane flux increases, HRT remains to decline with certain proportion, illustrates that this system can normally work under higher membrane flux, it is ensured that water yield, without there is the situation that film blocks.
2. mixed genetic-neural network: the present embodiment is respectively using 0-150mg/L (low scope), 0-1500mg/L (high scope) and three kinds of concentration of 0-15000mg/L (higher scope) as subjects, and keep flow constant, F/M proportion is 0.1-0.2gCOD/gMLSS d, and solid retention time (Solid Retention Time, referred to as SRT) in the range of 25-60 days, aeration rate is constant for 3L/min, and membrane flux is suitably adjusted to 1.7m3/m2D, obtains a result such as following table:
Operating characteristics parameter under the different mixed genetic-neural network of table 2
According to common MBR membrane flux and the relation research of Biomass (MLSS), after MLSS increases to a certain degree, then cannot continue to increase membrane flux due to film blockage problem.And higher membrane flux (1.7) is still can guarantee that in the present system when MLSS is 6000.It is said that in general, activated sludge concentration the highest (i.e. MLSS is the highest) in MBR technique, the disposal ability of sewage is the strongest.Therefore, the data explanation native system of table 2 can run under higher load, and can reach desired good treatment effect.
It addition, determine other parameters when pilot scale as follows:
Flooding parameter: pH, TSS (total suspended matter solid), BOD5(Biochemical oxygen demand on the 5th), Total COD (COD) (COD), NH4 +-N (ammonia nitrogen), TKN (total organic nitrogen), NO2-N (nitrite nitrogen), NO3-N (nitrate nitrogen), (TN) (total nitrogen), DO (dissolved oxygen) and temperature
In mixed solution: pH, MLSS, DO (film reaction is indoor) and temperature
Water outlet parameter: TSS, BOD5, COD, NH4 +-N, TKN, NO2-N, NO3-N, TN and temperature.
Concrete measurement result is as shown in Fig. 2-13.As seen from the figure, the various range of operating parameters of the present embodiment
As follows:
Flow: 2-3m3/d
Flow velocity: 3-5m/d
PH:5.5-7.0
Water temperature: the phase is stable at 22-26 DEG C after treatment
As can be seen from Figure 6, in water inlet total suspended matter solid concentration stable after 100-300mg/L, process water outlet total suspended matter solid concentration maintain reduced levels, about at below 20mg/L, suspended solids clearance averagely reaches 92%.
As can be seen from Figure 7, in water inlet COD concentration stable after 200-400mg/L, process the COD concentration of water outlet maintain reduced levels, about at below 100mg/L, COD clearance averagely reaches 90%.
As it can be observed in the picture that in Jin Shui BOD concentration stable after 100-200mg/L, process the BOD concentration of water outlet maintain reduced levels, about at below 50mg/L, BOD clearance averagely reaches 90%.
As can be seen from Figure 9, in water inlet total organic nitrogen concentration stable after 20-40mg/L, process the total organic nitrogen concentration of water outlet maintain reduced levels, about at below 10mg/L, organic nitrogen removal rate averagely reaches 93%.
As can be seen from Figure 10, in water inlet ammonia nitrogen concentration stable after 30mg/L, process the ammonia nitrogen concentration of water outlet maintain reduced levels, about at below 2mg/L, ammonia nitrogen removal frank averagely reaches 93%.
Knowable to Figure 11 and 12, after process, the concentration of nitric acid of water outlet is relatively low, about at below 1mg/L.
After each backwash, the saturating pressure of film returns to substantially new membrane stage, therefore need not Chemical cleaning.
The result finally processed is as shown in the table:
The removal effect table of table 3 treatment method
| Parameter | Removal efficiency |
| COD | 92 |
| TSS | 94 |
| TN | 81 |
| Ammonia nitrogen | 93 |
As seen from the above table, the COD of the sewage water treatment method of the present embodiment, TSS, the removal efficiency of ammonia nitrogen are all up to more than 90%, and the removal efficiency of TN also can reach 81%, shows excellent treatment effect.Filter, in sewage disposal process owing to the present embodiment have employed nylon nethike embrane, it is not necessary to the biggest aeration rate recoil, aeration intensity is low, and relatively conventional film technique saves the energy consumption of at least 50%；And, film is not easily formed obstruction, thus saves cleaning cost.It addition, also fenestra and effective filtration area are designed, to reach good wastewater treatment efficiency.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all any amendment, equivalent and improvement etc. made within the spirit and principles in the present invention, should be included within the scope of the present invention.
Claims (8)
1. a nickel-containing waste water processing system, comprising: chemical reaction system, film chemical reaction pond and Biochemistry Reaction System, wherein, described film chemical reaction pond is provided with partition wall (17), film chemical reaction pond is divided into reinforced deposition room (12) and film reaction room (13) by described partition wall, described partition wall offers the passage connecting described film reaction room with reinforced deposition room, and supernatant overflow launder (18)；Wherein, sewage is by chemical reaction system after treatment, film reaction room (13) is entered by described reinforced deposition room (12), discharged by film reaction room after reinforced deposition room and film reaction room process, wherein, described reinforced deposition room carries out flocculation sediment process to sewage, and described film reaction room is for carrying out solid-liquid separation to sewage；Described film reaction room includes that membrane module, described membrane module include Flat Membrane and support frame, and through the degree of depth solid-liquid separation of described Flat Membrane, water outlet enters Biochemistry Reaction System then qualified discharge.
Nickel-containing waste water processing system the most according to claim 1, it is characterized in that, described chemical reaction system carries out dosing flocculation to sewage, the waste water of flocculation enters reinforced deposition room (12), sufficiently flocculated the time with precipitation under conditions of substantially there is no waterpower agitation, and the floccule body of postprecipitation forms high concentration nickel-containing sludge, through being located at the sloping plate sludge collecting tank (14) of bottom, reinforced deposition room (12), periodically discharge outside reinforced deposition room (12).
Nickel-containing waste water processing system the most according to claim 1, it is characterized in that, described partition wall (17) is provided with overflow launder (18), wherein, supernatant (15) enters in film reaction room (13) by described overflow launder (18), discharge film chemical reaction pond (11) by the plate film assembly (132) being located in film reaction room (13), enter biological treatment system and carry out the process of follow-up denitrogenation and organics removal.
Nickel-containing waste water processing system the most according to claim 3, it is characterized in that, when described supernatant (15) enters film reaction room (13) by the overflow launder (18) being located on partition wall (17), part mud mixture (16) can enter film reaction room (13) by the interval at the bottom of partition wall (17) and pond, to ensure the sludge concentration that normally works of membrane module (132).
Nickel-containing waste water processing system the most according to claim 1, it is characterized in that, also set up an air diffuser (134), it is positioned at the bottom position of membrane module (132), and connect an aerator (136), for aeration in film reaction room (13) continuously, to maintain the properly functioning of film, it is effectively improved membrane flux, prevention film blocking.
6. a nickel-containing waste water processing method, it is characterised in that using the method that physics, chemistry are combined with biofacies, the method comprises the following steps:
Initially entering in regulating reservoir in physics, the chemical method removal of oil and grease waste water with chromium, regulate pH value, prevention influent quality changes suddenly；
The water outlet of regulating reservoir subsequently enters dosing flocculation basin and reaction tank, secondary, oxidation of phosphite becomes under the sodium hypochlorite effect with ferrous ion phosphate, thus flocculates into bigger granule precipitation；
Waste water after flocculation enters dosing flocculation basin and adds alkali and aluminium polychlorid thus by the nickel ion flocculation sediment in waste water；
The reinforced deposition room that waste water after flocculation sediment again enters in film chemical reaction pond fully carries out flocculation and precipitates, and the chemical sludge of precipitation discharges film chemical reaction pond by the sloping plate deposition groove under reinforced deposition room；
Supernatant after flocculation sediment enters film reaction room by reinforced deposition room overflow launder, realizes solid-liquid separation by the flat micro-filtration being fitted into, thus obtains comprising only the water outlet of micro-nickel；
After film reaction room processes, waste water enters biological treatment system and removes COD and total nitrogen, thus realizes qualified discharge.
7. sewage water treatment method as claimed in claim 6, it is characterised in that described air diffuser carries out aeration continuously and quantitatively to film reaction indoor, described aeration rate is less than 10 times of the process water yield.
8. sewage water treatment method as claimed in claim 6, it is characterised in that after sewage disposal, COD concentration is at 80 below mg/L, and total nickel concentration is at 0.3 mg/L, and total nitrogen concentration is at 15 below mg/L, total phosphorus concentration is at 1 below mg/L, it is possible to achieve the qualified discharge of nickel-containing waste water.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106116060A (en) * | 2016-08-26 | 2016-11-16 | 广东水清环保科技有限公司 | A kind of electro-coppering zinc-nickel cleans the processing means of waste water |
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| CN107557279B (en) * | 2017-10-24 | 2020-11-27 | 中南大学 | Reactor for efficiently culturing mineral leaching microorganisms |
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| CN112591965A (en) * | 2021-01-05 | 2021-04-02 | 哈尔滨工业大学 | Device for coupling and ultrafiltering water purification by ferrous/ultraviolet synergistic activation of sodium hypochlorite and operation method thereof |
| CN114195334A (en) * | 2022-01-06 | 2022-03-18 | 重庆市三峡鱼复排水有限责任公司 | Method for preventing high-concentration phosphorus-containing wastewater from impacting sewage treatment system |
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