CN105936564A - Biochemical system for treatment of heavy metals wastewater and process thereof - Google Patents
Biochemical system for treatment of heavy metals wastewater and process thereof Download PDFInfo
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Abstract
The present invention provides biochemical system for treatment of heavy metals wastewater. The system includes a microbial treatment module and a secondary purification module, which are connected by an intermediate tank; the microbial treatment module and the secondary purification module successively conducts treatment and recovery on the heavy metal wastewater; the microbial treatment module includes a first pump body, a primary filtration tank, a plurality of biological treatment tanks, a secondary pump body and a secondary filtration tank; the secondary purification module includes a third pump body and a secondary purification tank; the secondary purification tank has layering design inside; a bottom layer is fine quartz sand and charcoal, a middle layer is biomass packing, and an upper layer is glass balls. The invention also discloses a biochemical process for treatment of heavy metals wastewater. The invention aims at solving the problems of large processing difficulty, low efficiency and clean water purification in the heavy metal wastewater treatment process of the prior art.
Description
Technical field
The present invention relates to a kind of heavy metal containing sewage and process biochemical system and technique thereof.
Background technology
Heavy metal industrial effluent is as the development of modern industry and the product of association, conventional treatment method mainly has at present: chemical precipitation method, ion exchange, evaporation concentration method, electrolysis, activated carbon and silica gel adsorption and membrane separation process etc., but these methods exist shortcomings such as removing not thorough, somewhat expensive, generation toxic sludge or other waste materials.Therefore, various countries are devoted to heavy metal containing wastewater treatment technology and the technique of research and development efficient and environment-friendly type always.Microorganism treatment is to utilize the biomaterials such as antibacterial, fungus (yeast), algae and vital metabolic activity thereof remove and (or) accumulate the heavy metal in waste water, and make metal ion discharge in microbial body by certain method, thus reduce the concentration of heavy metal ions in wastewater.
The heavy metal-polluted water treatment technology of existing microorganism is the most ripe, adsorbs, frequently with kieselguhr, the microorganism having processed heavy metal, and this process technique can produce a large amount of kieselguhr containing heavy metal, and intractability is big, easily causes secondary pollution.On the other hand, the heavy metal-polluted water treatment technology of existing microorganism is discontinuous reaction treatment, both needed a period of time from delivering medicament to precipitation discharge, and thus certainly will take certain space and land resource to carry out sewage disposal.This mode is also determined by process characteristic, and treatment effeciency is relatively low, there is also the halfway problem of process.
Summary of the invention
For existing in existing heavy metal-polluted water technology, intractability is big, efficiency is low and purifies halfway problem, the invention provides a kind of heavy metal containing sewage and process biochemical system and technique thereof, this sewage disposal system is that continuous processes technique, adsorbed by microorganism, biomass filler and ultrafilter membrane heavy metal, remove the heavy metal in sewage, improve wastewater purification efficiency, promote clean-up effect.
It is as follows that the present invention solves the technical scheme that above-mentioned technical problem used:
A kind of heavy metal containing sewage is provided to process biochemical system, including microbial treatments module and double purification module, described microbial treatments module and double purification module are connected by pans, and described microbial treatments module and double purification module heavy metal sewage successively carries out processing recovery；
nullDescribed microbial treatments module includes first pump housing、Primary filter tank、Biochemical treatment tank、Second pump housing and secondary filter tank，Described biochemical treatment tank has multiple，Described biochemical treatment tank is provided with wastewater inlet、Inorganic agent import、Strain import and outlet，Described wastewater inlet、Inorganic agent import and strain import department are respectively provided with sewage valve、Inorganic agent valve、Strain valve and outlet valve，Multiple biochemical treatment tank are arranged in parallel，Described sewage valve、Inorganic agent valve、Strain valve and outlet valve are controlled by electric-control system，The import of described primary filter tank is connected with first pump housing，The outlet of described primary filter tank is respectively connecting to described wastewater inlet，Described inorganic agent import connects water return tank and inorganic agent storage tank，Described strain import connects seeding tank，Described outlet passes sequentially through second pump housing and secondary filter tank is connected to pans；
Described double purification module includes that the 3rd pump housing and double purification tank, described 3rd pump housing connect pans and double purification tank respectively, and described double purification tank interior laminate layer designs, and bottom is essence quartz sand and Linesless charcoal, and middle level is biomass fillers, and upper strata is glass bead；The outlet of described double purification tank is connected to water return tank by arranging the 4th pump housing.
Further, described inorganic agent storage tank includes that alkali tank, flocculant tank and sedimentation agent tank, the outlet of described flocculant tank and sedimentation agent tank arrange dosing pump, is provided with pH meter, described dosing pump and pH meter and is electrically connected with electric-control system in described biochemical treatment tank.
Further, being provided with steam generator outside described seeding tank, described steam generator is parallel between the inlet and outlet of seeding tank.
Further, the biomass filler in described double purification tank is the one or more combination in bagasse, wood flour, crop stalk, phragmites communis, shell.
Further, the bottom of described double purification tank is additionally provided with ultrafilter membrane.
Further, the quantity of described secondary filter tank is 2, parallel with one another by three-way valve between secondary filter tank.
The biochemical process that a kind of heavy metal containing sewage processes, uses a kind of heavy metal containing sewage as above to process biochemical system, including following operating procedure:
Step one: charging process, carry out the charging of biochemical treatment tank, the heavy metal in waste water content that detection need to process, described biochemical treatment tank has multiple, the sewage valve controlling first biochemical treatment tank is opened, import waste water, add water in this biochemical treatment tank simultaneously, heavy metal in waste water content is diluted to below 1000mg/L, waste water isopyknic process bacterium solution after adding and diluting, after first biochemical treatment tank has fed, close its sewage valve, open the sewage valve of next biochemical treatment tank simultaneously, start the charging of next biochemical treatment tank, circulation carries out the charging of each biochemical treatment tank successively；
Step 2: processing procedure, after single biochemical treatment tank has fed, stirring reaction 7～30min, bacterium solution absorbs heavy metal, in reactant liquor, add flocculant, static 2-5min in 0.1%～5%V:V ratio, then in reactant liquor, add sedimentation agent in 0.1%～2%W:V ratio, alkali is added in reactant liquor, between regulation pH to 6～9, opening outlet valve, the reactant liquor after processing imports in secondary filter tank and filters, heavy metal precipitation recycles, and obtains first class purification water；
Step 3: double purification process, first class purification water in step 2 is imported in double purification tank, sequentially pass through glass bead, biomass filler and essence quartz sand, the filtration treatment of Linesless charcoal, again through ultrafiltration membrance filter, obtaining secondary purification water, in part secondary purification water importing water return tank, the water for the process that feeds supplements.
Further, the number of described biochemical treatment tank is more than or equal to: the numerical value that the time used by single biochemical treatment tank processing procedure rounded divided by the average time used by each biochemical treatment tank charging process.
Further, the preparation process of described process bacterium solution is: choose various heavy degradation bacteria as combination strain, use bean sprouts medium, at 23-39 DEG C, 100～300rpm, shake 36～54h under aerobic conditions, it is optimal for presenting thick.
Further, described flocculant is one or more in aluminum chloride, aluminium chloride ferrum, Alumen, iron chloride, and described sedimentation agent is one or more in EDTA, chitosan.
The biochemical treatment tank of multiple participation microbicidal metal adsorption reactions is combined into a processing system by the present invention, change traditional batch method for the treatment of, the most cultured process bacterium solution is put into biochemical treatment tank carries out with heavy metal wastewater thereby reaction absorption, when upper level biochemical treatment tank is in heavy metal adsorption processing procedure when, carry out the charging of next stage biochemical treatment tank, the processing stage of making each biochemical treatment tank be in different successively, whole system can be run on persistent loop ground, solve traditional batch process floor space wide, the problem that treatment effeciency is low, substantially increase sewage treating efficiency, whole processing system is controlled by electric-control system, running smoothness is stable；The heavy metal precipitation thing that present treatment system produces is less, the beneficially centralized recovery of heavy metal, reduces subsequent treatment cost.
First class purification water is obtained through mentioned microorganism adsorption treatment process, the first class purification water of the present invention has reached country's discharge water quality standard, in order to realize the recycling to water resource, after microorganism adsorption, it is provided with biomass filler and ultrafilter membrane combines and filters first class purification water further, lignin in biomass filler can carry out active adsorption to residual heavy metal, reduces the burden of ultrafilter membrane, reaches the effect saved water and energy, the recyclable water of up to 50%, social benefit is huge.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that a kind of heavy metal containing sewage that the present invention provides processes biochemical system；
Reference in Figure of description is as follows:
1, first pump housing；2, primary filter tank；3, water return tank；4, alkali tank；5, flocculant tank；6, precipitant tank；7, seeding tank；8, biochemical treatment tank；9, steam generator；10, the 4th pump housing；11, strain valve；12, sewage valve；13, inorganic agent valve；14, outlet valve；15, dosing pump；16, second pump housing；17, secondary filter tank；18, pans；19, the 3rd pump housing；20, double purification tank.
Detailed description of the invention
In order to make technical problem solved by the invention, technical scheme and beneficial effect 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.
The invention discloses a kind of heavy metal containing sewage and process biochemical system, including microbial treatments module and double purification module, described microbial treatments module and double purification module are connected by pans, and described microbial treatments module and double purification module heavy metal sewage successively carries out processing recovery；
nullDescribed microbial treatments module includes first pump housing 1、Primary filter tank 2、Biochemical treatment tank 8、Second pump housing 16 and secondary filter tank 17，Described biochemical treatment tank 8 has multiple，Described biochemical treatment tank 8 is provided with wastewater inlet、Inorganic agent import、Strain import and outlet，Described wastewater inlet、Inorganic agent import and strain import department are respectively provided with sewage valve 12、Inorganic agent valve 13、Strain valve 11 and outlet valve 14，Multiple biochemical treatment tank 8 are arranged in parallel，The i.e. wastewater inlet of each biochemical treatment tank 8、Inorganic agent import、Strain import and outlet are drawn from a pipeline respectively，Described sewage valve 12、Inorganic agent valve 13、Strain valve 11 and outlet valve 14 are controlled by electric-control system，It should be noted that，Described electric-control system is existing engineering equipment control system able to programme，Include but not limited to PLC control system，Within the simple substitute technical scheme of other control systems realizing function of the same race also should be included in protection scope of the present invention；
The import of described primary filter tank 2 is connected with first pump housing 1, described first pump housing 1 is connected into by aqueduct to be needed in heavy metal containing sewage to be processed, by first pump housing 1, heavy metal containing sewage is pumped in primary filter tank 2, primary filter tank 2 arranges the heavy metal sewage such as drainage screen or filter packing tentatively filter, remove the insoluble impurities in heavy metal containing sewage；nullThe outlet of described primary filter tank 2 is connected to the wastewater inlet of described biochemical treatment tank 8 respectively by pipeline shunt，Described inorganic agent import connects water return tank 3 and inorganic agent storage tank，Described strain import connects seeding tank 7，In biochemical treatment tank 8, it is passed through sewage by wastewater inlet，It is passed through thinned water by inorganic agent import and promotes the inorganic agent of bacterium solution flocculation sediment in biochemical treatment tank 8，In biochemical treatment tank 8, it is passed through fermented-heavy metal adsorption bacterium solution by strain import，Bacterium solution mixes with heavy metal containing sewage，Microorganism heavy metal in bacterium solution carries out adsorption and enrichment，Adding inorganic agent promotes bacterium solution to precipitate，Reactant liquor is discharged from the outlet of biochemical treatment tank，Described outlet passes sequentially through second pump housing 16 and secondary filter tank 17 is connected to pans 18，Reactant liquor is filtered by secondary filter tank 17，The microbe filter of Adsorption of Heavy Metals is separated，Described secondary filter tank 17 can use medical filter screen to filter，The heavy metal precipitation thing being filtrated to get is less，Enrichment is high，Processing cost is low，Can recycle further，Generate first class purification water to enter in pans 17，Described first class purification water has reached country's water discharge standard；
Biochemical treatment tank 8 parallel combination of multiple participation microbicidal metal adsorption reactions is become a processing system by the present invention, change traditional batch method for the treatment of, the most cultured process bacterium solution is put into biochemical treatment tank 8 carries out with heavy metal wastewater thereby reaction absorption, when upper level biochemical treatment tank 8 is in heavy metal adsorption processing procedure when, carry out the charging of next stage biochemical treatment tank 8, the processing stage of making each biochemical treatment tank 8 be in different successively, whole system can be run on persistent loop ground, solve traditional batch process floor space wide, the problem that treatment effeciency is low, substantially increase sewage treating efficiency, whole processing system is controlled by electric-control system, running smoothness is stable.
Described double purification module includes the 3rd pump housing 19 and double purification tank 20, described 3rd pump housing 19 connects pans 18 and double purification tank 20 respectively, by the 3rd pump housing 19 the first class purification water in pans 18 is pumped in double purification tank 20 and carries out deep purifying, described double purification tank 20 interior laminate layer designs, bottom is essence quartz sand and Linesless charcoal, middle level is biomass fillers, upper strata is glass bead, first class purification water enters from double purification tank top, filters respectively through glass bead, biomass filler and Linesless charcoal；The outlet of described double purification tank 20 is connected to water return tank 3 by arranging the 4th pump housing 10.
The biomass filler that the present invention uses is agricultural residue, and cost of material is low.As the present invention one preferred embodiment, biomass filler in described double purification tank 20 is the one or more combination in bagasse, wood flour, crop stalk, phragmites communis, shell, selected biomass filler processes through simple broken compression can form loose porous structure, it is suitable as filter packing to use, the principle of its Adsorption of Heavy Metals essentially consists in, containing lignin in this biomass filler, containing more methoxyl group in the molecular structure of lignin.Hydroxyl and carbonyl, these groups can adsorb the heavy metal ion in water, generates lignin-metallo-chelate, biomass filler can carry out in actual production process further and make lignin degeneration, improve metal-chelating effect.
Containing activated carbon composition in Linesless charcoal, for conventional ionic impurity adsorbent, it is not further detailed.
As the most preferably, the bottom of described double purification tank 20 is additionally provided with ultrafilter membrane, common ultrafilter membrane is difficult to filter the heavy metal of ion-type, the present invention is when above-mentioned bacterium solution adsorption process, some protein and the polysaccharide heavy metal of strain secretion have chelation, heavy metal ion is changed into macromolecular structure, in like manner, also can be by heavy metal ion chela synthetic macromolecule when biomass filler filters, consequently facilitating ultrafilter membrane filters, the content of beary metal of secondary purification water is reduced, it is achieved deep purifying.
As the present invention one preferred embodiment, described inorganic agent storage tank includes alkali tank 4, flocculant tank 5 and sedimentation agent tank 6, the outlet of described flocculant tank 5 and sedimentation agent tank 6 arranges dosing pump 15, described dosing pump 15 can select microprocessor pump drive or solid-state dosing pump accordingly according to used flocculant and the kind of sedimentation agent, described biochemical treatment tank 8 is provided with pH meter, described dosing pump 15 and pH meter are electrically connected with electric-control system, by flocculant and the amount of sedimentation agent of electric control system controls dosing pump 15 output, pH value data in biochemical treatment tank 8 are transferred to electric-control system by pH meter, electric-control system controls the alkali number output of alkali tank according to the pH value in biochemical treatment tank 8, thus reach the control of pH value in biochemical treatment tank.
The effect of described flocculant and sedimentation agent is by producing flocculate in water body, thus the microorganism in water body is carried out adsorption and sedimentation, the microorganism having adsorbed heavy metal is separated with water body, sedimentation agent also has and carries out, with heavy metal, the effect that chelates simultaneously, becomes precipitate and discharges from secondary filter tank.
As the present invention one preferred embodiment, described seeding tank 7 is outside is provided with steam generator 9, and described steam generator 9 is parallel between the inlet and outlet of seeding tank 7.Seeding tank 7 has the effect fermented bacterium solution and preserve, by seeding tank 7, biochemical reaction tank 8 is carried out the conveying of bacterium solution, and bacterium solution life-time service or replacing bacterium solution when, it is readily incorporated miscellaneous bacteria, to the fermentation of follow-up bacterium solution and preserve unfavorable, high-temperature steam can be produced by steam generator 9, high-temperature steam is passed through in seeding tank 7, periodically seeding tank 7 can be carried out disinfection, avoid the impact that follow-up bacterium solution is fermented by miscellaneous bacteria, in order to sewage disposal not impacted when seeding tank 7 is sterilized, the present embodiment arranges 2 seeding tanks 7 in parallel, when one of them seeding tank 7 carries out disinfection, another seeding tank 7 still can normally work.
Secondary filter tank 17 and the double purification tank 20 of the present invention are likewise provided as 2, three-way valve is passed through parallel with one another between described secondary filter tank 17, three-way valve is passed through parallel with one another between described double purification tank 20, after secondary filter tank 17 and double purification tank 20 run a period of time, need secondary filter tank 17 and double purification tank 20 are recoiled, so that the heavy metal precipitation stayed in filter process thing is gone out, recycle.
A kind of heavy metal containing sewage as above processes the heavy metal containing sewage corresponding to biochemical system and processes biochemical process, including following operating procedure:
Step one: charging process, carry out the charging of biochemical treatment tank, the heavy metal in waste water content that detection need to process, described biochemical treatment tank has multiple, the sewage valve controlling first biochemical treatment tank is opened, import waste water, add water in this biochemical treatment tank simultaneously, heavy metal in waste water content is diluted to below 1000mg/L, waste water isopyknic process bacterium solution after adding and diluting, after first biochemical treatment tank has fed, close its sewage valve, open the sewage valve of next biochemical treatment tank simultaneously, start the charging of next biochemical treatment tank, circulation carries out the charging of each biochemical treatment tank successively；
Step 2: processing procedure, after single biochemical treatment tank has fed, stirring reaction 7～30min, bacterium solution absorbs heavy metal, in reactant liquor, add flocculant, static 2-5min in 0.1%～5%V:V ratio, then in reactant liquor, add sedimentation agent in 0.1%～2%W:V ratio, alkali is added in reactant liquor, between regulation pH to 6～9, opening outlet valve, the reactant liquor after processing imports in secondary filter tank and filters, heavy metal precipitation recycles, and obtains first class purification water；
Step 3: double purification process, first class purification water in step 2 is imported in double purification tank, sequentially pass through glass bead, biomass filler and essence quartz sand, the filtration treatment of Linesless charcoal, again through ultrafiltration membrance filter, obtaining secondary purification water, in part secondary purification water importing water return tank, the water for the process that feeds supplements.
The number of the biochemical treatment tank that the above heavy metal containing sewage process biochemical system and technique are used is more than or equal to: the numerical value that the time used by single biochemical treatment tank processing procedure rounded divided by the average time used by each biochemical treatment tank charging process.Further preferably, the numerical value that the number of biochemical treatment tank rounded divided by the average time used by each biochemical treatment tank charging process equal to the time used by single biochemical treatment tank processing procedure, after the biochemical treatment tank microbial treatments of chopped-off head and discharge complete, the biochemical treatment tank of final stage has just fed, the biochemical treatment tank of chopped-off head can feed again again, it is achieved uninterrupted sewage disposal.
This heavy metal containing sewage processes biochemical system and technique needs to ferment process bacterium solution in advance, the preparation process of described process bacterium solution is: choose various heavy degradation bacteria as combination strain, use bean sprouts medium, at 23-39 DEG C, 100～300rpm, shake 36～54h under aerobic conditions, present thick.It should be noted that, traditional microbiological processes heavy metal containing sewage and is to select heavy metal tolerance bacterium fermentation process in sewage, it is long that this process processes the time, and the heavy metal tolerance level of strain is limited, the sewage of some high content of beary metal, such as Electroplate Factory's sewage, the general strain that processes also cannot process, and the present invention uses the method for post processing of first fermenting, it is possible to ensure bacterial concentration, greatly shorten the time of sewage disposal, reduce the requirement of strain heavy metal tolerance level.
Filter to be beneficial to adsorb the precipitation of the microorganism of heavy metal; need reactant liquor after the reaction adds flocculant and sedimentation agent; described flocculant is one or more in aluminum chloride, aluminium chloride ferrum, Alumen, iron chloride; described sedimentation agent be EDTA, chitosan etc. one or more; it should be noted that; flocculant and sedimentation agent selected by the present invention are conventional medicament, and other flocculant realizing function of the same race and sedimentation agent also should include within the scope of the present invention.
By the following examples the present invention is further detailed.
Embodiment 1
The sewage that the present embodiment uses surmounts five metals plastics company limited from king mountain, Shenzhen, its Heavy Metals in Waters content such as table 1 after testing:
Table 1
It is processed by the process technique using the present invention, comprises the following steps:
Step one: charging process, first pump housing starts, opened by the sewage valve of electric control system controls biochemical treatment tank, import 10L sewage, control water return tank to be diluted toward addition 40L water in this biochemical treatment tank simultaneously, seeding tank adds and the process bacterium solution of waste water equal-volume (50L) after dilution in this biochemical treatment tank, after first biochemical treatment tank has fed, close its sewage valve, open the sewage valve of next biochemical treatment tank simultaneously, start the charging of next biochemical treatment tank, circulation carries out the charging of each biochemical treatment tank successively, described biochemical treatment tank is 5；
Step 2: processing procedure, after single biochemical treatment tank has fed, stirring reaction 10min, bacterium solution absorbs heavy metal, in reactant liquor, flocculant aluminum chloride is added in 0.8%V:V ratio, static 4min, then in reactant liquor, sedimentation agent EDTA is added in 0.5%W:V ratio, in reactant liquor, add alkali, between regulation pH to 6～9, opening outlet valve, the reactant liquor after processing imports in secondary filter tank and filters, and heavy metal precipitation recycles, obtaining first class purification water, first class purification water imports in pans；
Step 3: double purification process, first class purification water in step 2 is imported in double purification tank, sequentially pass through glass bead, biomass filler and essence quartz sand, the filtration treatment of Linesless charcoal, again through ultrafiltration membrance filter, obtaining secondary purification water, in part secondary purification water importing water return tank, the water for the process that feeds supplements.
In pans, extract first class purification water water sample, be designated as S1, water return tank extracts secondary purification water water sample, is designated as S1 '.
Water quality detection
To above-mentioned water sample S1 and S1 ' prepared, carry out the detection of content of beary metal in sewage:
Heavy metal detector is iris detection technique company limited of Shenzhen inductive coupling plasma emission spectrum transmitter (ICP-AES ICAP6300), carries out according to " water and effluent monitoring analyze method " fourth edition State Environmental Protection Administration method in 2002.
The test result obtained inserts table 2.
Table 2
Test result in contrast Tables 1 and 2 understands, process biochemical system by a kind of heavy metal containing sewage disclosed by the invention and technique heavy metal sewage processes, can effectively remove the heavy metal ion in industrial wastewater, wherein heavy metal chromium, copper, the elimination effect of zinc is particularly evident, by the data of S1 can be seen that through microbial treatments generate first class purification water already close to the standard purified water, be can be seen that the heavy metal ion in the secondary purification water that whole set process processes is removed the most substantially by the data of S1 ', secondary purification water recoverable meets service water, utilizing with water of this technique recyclable up to 50%, water-saving benefit is huge.
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 (10)
1. a heavy metal containing sewage processes biochemical system, it is characterized in that, including microbial treatments module and double purification module, described microbial treatments module and double purification module are connected by pans, and described microbial treatments module and double purification module heavy metal sewage successively carries out processing recovery；
nullDescribed microbial treatments module includes first pump housing、Primary filter tank、Biochemical treatment tank、Second pump housing and secondary filter tank，Described biochemical treatment tank has multiple，Described biochemical treatment tank is provided with wastewater inlet、Inorganic agent import、Strain import and outlet，Described wastewater inlet、Inorganic agent import and strain import department are respectively provided with sewage valve、Inorganic agent valve、Strain valve and outlet valve，Multiple biochemical treatment tank are arranged in parallel，Described sewage valve、Inorganic agent valve、Strain valve and outlet valve are controlled by electric-control system，The import of described primary filter tank is connected with first pump housing，The outlet of described primary filter tank is respectively connecting to described wastewater inlet，Described inorganic agent import connects water return tank and inorganic agent storage tank，Described strain import connects seeding tank，Described outlet passes sequentially through second pump housing and secondary filter tank is connected to pans；
Described double purification module includes that the 3rd pump housing and double purification tank, described 3rd pump housing connect pans and double purification tank respectively, and described double purification tank interior laminate layer designs, and bottom is essence quartz sand and Linesless charcoal, and middle level is biomass fillers, and upper strata is glass bead；The outlet of described double purification tank is connected to water return tank by arranging the 4th pump housing.
A kind of heavy metal containing sewage the most according to claim 1 processes biochemical system, it is characterized in that, described inorganic agent storage tank includes alkali tank, flocculant tank and sedimentation agent tank, the outlet of described flocculant tank and sedimentation agent tank arranges dosing pump, described biochemical treatment tank is provided with pH meter, described dosing pump and pH meter be electrically connected with electric-control system.
A kind of heavy metal containing sewage the most according to claim 1 processes biochemical system, it is characterised in that being provided with steam generator outside described seeding tank, described steam generator is parallel between the inlet and outlet of seeding tank.
A kind of heavy metal containing sewage the most according to claim 1 processes biochemical system, it is characterised in that the biomass filler in described double purification tank is the one or more combination in bagasse, wood flour, crop stalk, phragmites communis, shell.
A kind of heavy metal containing sewage the most according to claim 1 processes biochemical system, it is characterised in that the bottom of described double purification tank is additionally provided with ultrafilter membrane.
A kind of heavy metal containing sewage the most according to claim 1 processes biochemical system, it is characterised in that the quantity of described secondary filter tank is 2, parallel with one another by three-way valve between secondary filter tank.
7. a heavy metal containing sewage processes biochemical process, it is characterised in that use the biochemical system processed such as any one heavy metal containing sewage in claim 1～6, including following operating procedure:
Step one: charging process, carry out the charging of biochemical treatment tank, the heavy metal in waste water content that detection need to process, described biochemical treatment tank has multiple, the sewage valve controlling first biochemical treatment tank is opened, import waste water, add water in this biochemical treatment tank simultaneously, heavy metal in waste water content is diluted to below 1000mg/L, waste water isopyknic process bacterium solution after adding and diluting, after first biochemical treatment tank has fed, close its sewage valve, open the sewage valve of next biochemical treatment tank simultaneously, start the charging of next biochemical treatment tank, circulation carries out the charging of each biochemical treatment tank successively；
Step 2: processing procedure, after single biochemical treatment tank has fed, stirring reaction 7～30min, bacterium solution absorbs heavy metal, in reactant liquor, add flocculant, static 2-5min in 0.1%～5%V:V ratio, then in reactant liquor, add sedimentation agent in 0.1%～2%W:V ratio, alkali is added in reactant liquor, between regulation pH to 6～9, opening outlet valve, the reactant liquor after processing imports in secondary filter tank and filters, heavy metal precipitation recycles, and obtains first class purification water；
Step 3: double purification process, first class purification water in step 2 is imported in double purification tank, sequentially pass through glass bead, biomass filler and essence quartz sand, the filtration treatment of Linesless charcoal, again through ultrafiltration membrance filter, obtaining secondary purification water, in part secondary purification water importing water return tank, the water for the process that feeds supplements.
A kind of heavy metal containing sewage the most according to claim 7 processes biochemical process, it is characterized in that, the number of described biochemical treatment tank is more than or equal to: the numerical value that the time used by single biochemical treatment tank processing procedure rounded divided by the average time used by each biochemical treatment tank charging process.
A kind of heavy metal containing sewage the most according to claim 7 processes biochemical process, it is characterized in that, the preparation process of described process bacterium solution is: choose various heavy degradation bacteria as combination strain, use bean sprouts medium, at 23-39 DEG C, 100～300rpm, shake 36～54h under aerobic conditions, it is optimal for presenting thick.
A kind of heavy metal containing sewage the most according to claim 7 processes biochemical process, it is characterised in that described flocculant is one or more in aluminum chloride, aluminium chloride ferrum, Alumen, iron chloride, and described sedimentation agent is one or more in EDTA, chitosan.
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| CN112875993A (en) * | 2021-01-25 | 2021-06-01 | 吕梁学院 | Purification device with heavy metal wastewater |
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| CN105936564B (en) | 2018-10-26 |
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