CN109896506A - A kind of extraction element and method of selenium - Google Patents
A kind of extraction element and method of selenium Download PDFInfo
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- CN109896506A CN109896506A CN201910214146.9A CN201910214146A CN109896506A CN 109896506 A CN109896506 A CN 109896506A CN 201910214146 A CN201910214146 A CN 201910214146A CN 109896506 A CN109896506 A CN 109896506A
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Abstract
The invention discloses a kind of extraction element of selenium and methods, and wherein the extraction element of selenium includes: the coarse filtration pipe for filtering selenium-containing wastewater, and the first waste water is obtained after filtering；The activated sludge sponge containing activated sludge is provided with for carrying out the activated sludge reaction pond of activated sludge reaction, and in activated sludge reaction pond, activated sludge sponge obtains the second waste water and selenium-containing active sludge sponge with after the first waste water reaction preset time；For carrying out the flushing tank of clear water flushing to selenium-containing active sludge sponge, the first solution of objective microbe containing selenium is obtained after flushing；Rose Box for the first solution of objective microbe containing selenium to be filtered obtains the second solution of objective microbe containing selenium after filtering；Pipe is blended for crack the second solution of objective microbe containing selenium, obtains Se solution after cracking；Selenium filter tip for Se solution to be filtered, obtains elemental selenium after filtering.The device can effectively extract selenium from selenium-containing wastewater, and the loss of selenium resource is avoided.
Description
Technical field
The present invention relates to chemical technology field, in particular to the extraction element and method of a kind of selenium.
Background technique
As social industrialization degree is higher and higher, global resources shortage crisis is constantly deepened, and resource scarcity, which becomes, to be restricted
The bottleneck of socio-economic development, resource problem also affect the various aspects of people's daily life.Selenium as a kind of natural resources,
It is microelement necessary to humans and animals physiology, plays the role of to human health particularly important.
With the development of industry, the selenium artificially generated is also increase accordingly, and selenium-containing wastewater is mainly derived from mining, metal smelting
Refining, PETROLEUM PROCESSING burn coal fire power plant and local agricultural irrigation etc., if selenium concentration is up to 10mg/L or more in mining wastewater, also deposit
In all kinds of heavy metals such as zinc, cadmium, lead, and waste water is in acidity, big to environmental hazard.The processing of selenium-containing wastewater is mainly passed through at present
Up-flow anaerobic reactor (UASB), moving bed biofilm reactor (MBBR) etc. are handled.But current reactor
Only waste water is handled, and the selenium in waste water is not extracted effectively, so as to cause being largely lost for selenium resource.
Therefore, how selenium resource effectively to be extracted from selenium-containing wastewater, so that avoiding the loss of selenium resource is ability
The technical issues of field technique personnel's urgent need to resolve.
Summary of the invention
In view of this, can be provided from selenium-containing wastewater to selenium the purpose of the present invention is to provide a kind of extraction element of selenium
Source is effectively extracted, to avoid the loss of selenium resource.
Another object of the present invention, which also resides in, provides a kind of extracting method of selenium.
To achieve the above object, the invention provides the following technical scheme:
A kind of extraction element of selenium, comprising:
For filtering the coarse filtration pipe of selenium-containing wastewater, the first waste water is obtained after filtering；
Be provided with for carrying out the activated sludge reaction pond of activated sludge reaction, and in the activated sludge reaction pond containing
After the activated sludge sponge of activated sludge, the activated sludge sponge and the first waste water reaction preset time, second is obtained
Waste water and selenium-containing active sludge sponge；
For carrying out the flushing tank of clear water flushing to the selenium-containing active sludge sponge, the first target containing selenium is obtained after flushing
Microbial solution；
Rose Box for the first objective microbe containing selenium solution to be filtered, obtains the second mesh containing selenium after filtering
Mark microbial solution；
Pipe is blended for crack the second objective microbe containing selenium solution, obtains Se solution after cracking；
Selenium filter tip for the Se solution to be filtered, obtains elemental selenium after filtering.
Preferably, be provided with filter screen and lower filter screen in the coarse filtration pipe, the upper filter screen and it is described descended
Filter medium is filled between strainer；
The upper filter screen is detachable filter screen, and the lower filter screen is fixed filter screen.
Preferably, the coarse filtration pipe subscript has the graduation mark for regulating and controlling the filter medium.
Preferably, the activated sludge reaction pond is connected with the coarse filtration pipe, and the activated sludge reaction pond and
Sponge net is provided between the coarse filtration pipe.
Preferably, further includes:
For wrapping up the silk screen of the activated sludge sponge；
Pulley assembly；
The pulley assembly is connected with the silk screen, and the activated sludge sponge can be transferred to institute by the pulley assembly
It states in flushing tank；
Sieve is provided in the flushing tank.
Preferably, the flushing tank is connected with the Rose Box, is provided with filter medium in the Rose Box.
Preferably, the Rose Box is connected with the pipe that blends, and described blend is provided with several rotary wind type impellers in pipe,
The rotary wind type impeller and motor electrical connection.
Preferably, further include drainage, the selenium filter tip be set to the drainage and it is described blend between pipe and with institute
It states drainage to be connected with the pipe that blends, the selenium filter tip includes the first filter membrane and the second filter membrane, first filter membrane and institute
Stating has gap between the second filter membrane.
A kind of extracting method of selenium, comprising:
1) selenium-containing wastewater is subjected to coarse filtration, obtains the first waste water；
2) first waste water is reacted with the activated sludge sponge containing activated sludge, is obtained after reacting preset time
To the second waste water and selenium-containing active sludge sponge；
3) sponge of the selenium-containing active sludge is rinsed, obtains the first solution of objective microbe containing selenium；
4) the first objective microbe containing selenium solution is filtered, obtains the second solution of objective microbe containing selenium；
5) the second objective microbe containing selenium solution is blended, obtains Se solution；
6) it is filtered the Se solution to obtain elemental selenium.
Preferably, the mass ratio of the amount of fill of the activated sludge and first waste water is 1:10.
As can be seen from the above technical solutions, the extraction element of selenium disclosed in this invention, comprising: useless containing selenium for filtering
The coarse filtration pipe of water, obtains the first waste water after filtering；For carrying out the activated sludge reaction pond of activated sludge reaction, and activity is dirty
The activated sludge sponge containing activated sludge, activated sludge sponge and the first waste water reaction preset time are provided in mud reaction tank
Afterwards, the second waste water and selenium-containing active sludge sponge are obtained；For carrying out the flushing tank of clear water flushing to selenium-containing active sludge sponge,
The first solution of objective microbe containing selenium is obtained after flushing；Filtering for the first solution of objective microbe containing selenium to be filtered
Case obtains the second solution of objective microbe containing selenium after filtering；It is stirred for crack the second solution of objective microbe containing selenium
Broken pipe obtains Se solution after cracking；Selenium filter tip for Se solution to be filtered, obtains elemental selenium after filtering.The dress
Selenium resource can effectively be extracted from selenium-containing wastewater by setting, and so as to avoid the loss of selenium resource, protect environmental resource,
The mankind are benefited.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below to embodiment or existing
Attached drawing needed in technical description is briefly described, it is clear that, the accompanying drawings in the following description is only this hair
Bright embodiment for those of ordinary skill in the art without creative efforts, can also be according to mentioning
The attached drawing of confession obtains other attached drawings.
Fig. 1 is the structural schematic diagram of the extraction element of the selenium disclosed in the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the reserve tank disclosed in the embodiment of the present invention；
Fig. 3 is the schematic view of the front view of the selenium filter tip and drainage disclosed in the embodiment of the present invention；
Fig. 4 is the side structure schematic view of the selenium filter tip and drainage disclosed in the embodiment of the present invention；
Fig. 5 is the overlooking structure diagram of the selenium filter tip and drainage disclosed in the embodiment of the present invention；
Fig. 6 is the column structure statistical chart of the removal rate of 1 Selenium in Wastewater of experiment disclosed in the embodiment of the present invention；
Fig. 7 is the column structure figure of the removal rate of 2 Selenium in Wastewater of experiment disclosed in the embodiment of the present invention；
Fig. 8 is the column structure figure of the removal rate of 3 Selenium in Wastewater of experiment disclosed in the embodiment of the present invention.
Wherein, the names of the parts are as follows:
1- coarse filtration pipe, the upper filter screen of 11-, filter screen under 12-, 13- sponge net, 2- activated sludge reaction pond, 21- activity
Sludge sponge, 3- flushing tank, 31- sieve, 32- aeration head, 4- Rose Box, 5- blend pipe, 51- rotary wind type impeller, 6- selenium filter tip,
The first filter membrane of 61-, the second filter membrane of 62-, 7- pulley assembly, 8- reserve tank, 9- drainage.
Specific embodiment
In view of this, core of the invention is to provide a kind of extraction element of selenium, selenium can be provided from selenium-containing wastewater
Source is effectively extracted, to avoid the loss of selenium resource.
Another core of the invention, which also resides in, provides a kind of extracting method of selenium.
In order to enable those skilled in the art to better understand the solution of the present invention, connection with figures and specific embodiment below
The present invention is described in further detail.
It is heretofore described it is " several " be that exponential quantity is uncertain multiple, it is usually more than two；And when using " several "
When indicating the quantity of certain several component, the quantity for being not offered as these components is identical.
As shown in Figure 1, the extraction element of selenium disclosed in the embodiment of the present invention, comprising: for filtering the thick of selenium-containing wastewater
Screen pipe 1 obtains the first waste water after filtering；For carrying out the activated sludge reaction pond 2 of activated sludge reaction, and activated sludge is anti-
It answers and is provided with the activated sludge sponge 21 containing activated sludge in pond 2, when activated sludge sponge 21 and the first waste water reaction are preset
Between after, obtain the second waste water and selenium-containing active sludge sponge；For carrying out the flushing of clear water flushing to selenium-containing active sludge sponge
Pond 3 obtains the first solution of objective microbe containing selenium after flushing；Mistake for the first solution of objective microbe containing selenium to be filtered
Filter box 4 obtains the second solution of objective microbe containing selenium after filtering；For what the second solution of objective microbe containing selenium was cracked
Pipe 5 is blended, obtains Se solution after cracking；Selenium filter tip 6 for Se solution to be filtered, obtains elemental selenium after filtering.
The filter medium that fair amount is loaded first in coarse filtration pipe 1, filter medium is imported in coarse filtration pipe 1 and is carried out
First processing, the big material grains in selenium-containing wastewater are removed, and treated for the first time, and selenium-containing wastewater enters activated sludge reaction pond 2
Activated sludge in neutralization activity sludge sponge 21 is reacted, and the microorganism in activated sludge can be adsorbed in the first waste water
Activated sludge sponge 21 is put into progress clear water flushing in flushing tank 3 after the default reaction time by selenium, by activated sludge sea
Microorganism containing selenium in silk floss 21 is molten into clear water, and it is molten to form the first objective microbe containing selenium after microorganism containing selenium and clear water mixing
Liquid obtains the second solution of objective microbe containing selenium after being filtered the first solution of objective microbe containing selenium by Rose Box 4, lead to
It crosses and blends pipe 5 and crack the second solution of objective microbe containing selenium, Se solution is formed after blending, finally by selenium filter tip 6
Elemental selenium is obtained after being filtered to Se solution.The device can effectively extract selenium resource from selenium-containing wastewater, from
And the loss of selenium resource is avoided, environmental resource is protected, the mankind have been benefited.
It is emphasized that the extraction element of selenium disclosed in the embodiment of the present invention is all made of transparent material, preferably adopt
It is manufactured with the material of transparent organic glass, in order to observe the process entirely tested,
It should be noted that filter screen 11 and lower filter screen 12 are provided in coarse filtration pipe 1, upper filter screen 11 and lower mistake
Filter medium is filled between strainer 12；Upper filter screen 11 is detachable filter screen, and lower filter screen 12 is fixed filter screen.
So set, when needing to fill filter medium into coarse filtration pipe 1, filter medium is filled into slightly by filter screen 11 in opening
After in screen pipe 1, then upper filter screen 11 installed, it, need to be by selenium-containing wastewater from upper filtering when selenium-containing wastewater is filtered
It pours into net 11 in coarse filtration pipe 1, is flowed out from lower filter screen 12 again through the filtered selenium-containing wastewater of filter medium, therefore, on
The smooth filtering of selenium-containing wastewater can not only be effectively ensured in the setting of filter screen 11 and lower filter screen 12, also facilitate filter medium
Filling and taking-up.
Filter medium can be rubble, sieve or quartz sand, not make to filter medium in embodiments of the present invention specific
It limits, as long as not having the filter medium of adsorptivity, the filter medium in the embodiment of the present invention preferably uses quartz sand.
In order to rationally control the amount of filter medium, as one of embodiment, it is further marked on coarse filtration pipe 1 for adjusting
The graduation mark for controlling filter medium, the amount of filter medium can be clearly found out by the mark of graduation mark.Certainly, graduation mark is preferably marked
Note had not only facilitated design, but also facilitate observation in the outer surface of coarse filtration pipe 1.
Activated sludge reaction pond 2 is connected with coarse filtration pipe 1, with continued reference to FIG. 1, coarse filtration pipe 1 and activated sludge are anti-
It answers and is provided with connecting pipeline between pond 2, connecting pipeline is preferably disposed on the lower end of lower filter screen 12, after the filtering of coarse filtration pipe 1
The first waste water enter in activated sludge reaction pond 2 through connecting pipeline.
The sludge sand in activated sludge reaction pond 2 flows back in coarse filtration pipe 1 in order to prevent, in coarse filtration net 1 and activity
Sponge net 13 is additionally provided between sludge reaction pond 2, so set, sponge net can be to avoid the dirt in activated sludge reaction pond 2
Silt flows back in coarse filtration pipe 1.
It is appreciated that activated sludge sponge 21 is the sponge containing activated sludge, active dirt is filled in the gap of sponge
Mud, activated sludge can be acidproof, resistance to heavy metal, and the activated sludge contained in the first waste water and activated sludge sponge 21 is reacted,
After reacting preset time, the second waste water obtained in activated sludge reaction pond 2 is discharged.
The discharge of second waste water for convenience, needs setting waste water discharge opening on activated sludge reaction pond 2, and the present invention is implemented
The specific location of waste water discharge opening is not especially limited in example, waste water discharge opening can be set in activated sludge reaction pond 2
Bottom also can be set in the side in activated sludge reaction pond 2, as long as can be smoothly anti-by the second waste water discharge activated sludge
Pond 2 is answered, waste water discharge opening is preferably set to the side in activated sludge reaction pond 2 in the embodiment of the present invention.
Switch valve need to be arranged in waste water discharge opening, it is of course possible to and electric switching valve is set, manual switch valve also can be set,
When the first waste water and activated sludge reaction, switch valve is closed, and guarantees that experiment is gone on smoothly, can be with after the completion of the experimental procedure
Second waste water is discharged the form manually or electrically controlled.
It should be noted that being also equipped with graduation mark on activated sludge reaction pond 3, certain graduation mark is preferably disposed on activity
The outer surface in sludge reaction pond 3 is not only convenient for the design of device, is also convenient for the amount of the second waste water of regulation.
It is appreciated that after the second waste water in activated sludge reaction pond 2 drains, into next experimental procedure, that is,
Activated sludge sponge 21 is placed into progress clear water flushing in flushing tank 3.
When activated sludge sponge 21 in activated sludge reaction pond 2 with the first waste water reaction after the completion of, need to be by activated sludge
Sponge 21, which is put into flushing tank 3, carries out clear water flushing to obtain the first solution of objective microbe containing selenium, certainly, by activated sludge sea
The method that silk floss 21 is placed into cesspool 3 has very much, for example, can be transferred into flushing tank 3 manually by personnel, it can also
To be proceeded in flushing tank 3 by hoist tool.
Certainly, activated sludge sponge 21 is smoothly put into flushing tank 3 in order to facilitate labour-saving, it is preferred to use hoist tool
To activated sludge sponge 21 carry out handling, it is of the invention in one embodiment, in the outer surface of activated sludge sponge 21
Provided with silk screen, since the silk screen of selection must be solid and reliable, wire mesh is preferably used in the present embodiment, and wire
Part metals in net obtain intensity can be up to standard, but part metals are easy to be corroded, and not only intensity is high for stainless steel cloth, and
And it is resistant to chemical etching, therefore stainless steel cloth is more preferably used in the present embodiment.
Pulley assembly 7 is also provided on extraction element, with continued reference to FIG. 1, pulley assembly 7 includes support rod and setting
In the movable pulley on support rod, wherein movable pulley and driving device electrical connection, support rod are fixed on extraction element, are supported certainly
Bar is preferably fixed at activated sludge reaction pond 2 and the position of flushing tank 3.
Movable pulley is driven by driving device, and driving device can be hydraulic motor, or motor, in the present invention
Embodiment in driving device preferably use motor, motor can drive the direction of movable pulley circumferentially to be rotated, movable pulley
It is attached by rope and silk screen, when opening motor, motor drives movable pulley along the circumferential direction to be rotated, to will live
Property sludge sponge 21 is transferred in flushing tank 3 out of activated sludge reaction pond 2.
In order to increase the contact area of activated sludge sponge 21 Yu clear water, enable activated sludge sponge 21 is sufficient to obtain
To flushing, sieve 31 is provided in flushing tank 3, sieve 31 is set to the middle and lower part of flushing tank 3, and activated sludge sponge 21 is placed in
31 top of sieve, clear water can the activated sludge adequately in activated sludge sponge 21 be rinsed.
In order to guarantee that clear water can smoothly flow into flushing tank 3, in embodiments of the present invention, it is passed through in flushing tank 3
For the conduit that clear water flows into, clear water is entered in flushing tank 3 by the conduit, is rinsed to movable sludge sponge 21.It needs
Illustrate, be additionally provided with graduation mark in flushing tank 3, in order to the amount of Reasonable Regulation And Control injected clear water.
In addition, the bottom of flushing tank 3 is additionally provided with aeration head 32, convenient for the target containing selenium in activated sludge sponge 21 is micro-
Biology is shaken off into clear water.
After the completion of being rinsed in flushing tank 3, it need to enter and filter this experimental procedure, in the embodiment of the present invention, flushing tank 3
It is connected with Rose Box 4, the first solution of objective microbe containing selenium is filtered to obtain second in Rose Box 4 by filter medium to be contained
Selenium objective microbe solution.
When flushing tank 3 and mutually indepedent Rose Box 4, can be connected by communicating pipe between flushing tank 3 and Rose Box 4
It is logical, naturally it is also possible to flushing tank 3 and Rose Box 4 are first arranged and are integrated, then setting partition is separated therebetween, at this
Aperture on partition, so that flushing tank 3 is connected to Rose Box 4.Certain either communicating pipe or aperture are both needed to setting switch valve
It is opened or closed according to experiment.
Filter medium can be rubble, sieve or quartz sand, not make to filter medium in embodiments of the present invention specific
It limits, as long as not having the filter medium of adsorptivity, the filter medium in the embodiment of the present invention preferably uses quartz sand.
It should be noted that Rose Box 4 is connected with pipe 5 is blended, blends and be provided with rotary wind type impeller 51, rotor in pipe 5
Formula impeller 51 and motor electrical connection, open motor, motor driven rotary wind type impeller 51, and rotary wind type impeller 51 works so that second contains
Microorganism in selenium objective microbe solution is cracked by centrifugal force effect, obtains Se solution.
In order to further enhance centrifugal efficiency, the left and right ends for blending pipe 5 are provided with valve switch, when blending 5 work of pipe
When making, valve switch need to be closed.
It further include drainage 9 in the extraction element of selenium disclosed in the embodiment of the present invention, selenium filter tip 6 is set to drainage 9
And blend between pipe 5 and with drainage 9 and blend pipe 5 and be connected, selenium filter tip 6 includes the first filter membrane 61 and the second filter membrane 62,
In between the first filter membrane 61 and the second filter membrane 62 have gap.Wherein the first filter membrane 61 is arranged close to pipe 5 is blended, the second filter membrane 62
It is arranged close to drainage 9.
It should be noted that the aperture of the first filter membrane 61 is preferably arranged between 90nm-100nm, the hole of the second filter membrane 62
Diameter is preferably arranged between 0.7nm-1.0nm, and the gap between the first filter membrane 61 and the second filter membrane 62 is preferably arranged to 90nm-
Between 110nm.
Due to the microorganism in activated sludge can through the embodiment of the present invention in the extraction element of selenium that provides will contain selenium
Water soluble selenium in waste water is reduced into selenium simple substance, after the second solution of objective microbe containing selenium is blended, intracellular selenium list
Matter exists in colloidal form just into Se solution, and colloidal solid is typically sized between 1nm-100nm, therefore,
First filter membrane 61 is for blocking the suspended matter bigger than colloid, and suspended matter here refers mainly to cell debris, and the second filter membrane 62 is used for
Elemental selenium colloidal solid is blocked, such elemental selenium has just been enriched in gradually between the first filter membrane 61 and the second filter membrane 62, works as process
After some cycles, elemental selenium colloid is just filled between the first filter membrane 61 and the second filter membrane 62.
Certainly, the pick-and-place to selenium filter tip 6 for convenience, is additionally provided with grip part, grip part can be block on selenium filter tip 6
Shape object, or ball etc., after the elemental selenium colloid between the first filter membrane 61 and the second filter membrane 62 is full of, staff
Grip part can be taken with hand, the length direction by selenium filter tip 6 along drainage 9 slides, slides into exit and take selenium filter tip 6
Out, the elemental selenium between the first filter membrane 61 and the second filter membrane 62 is shaked out by ultrasonic wave again after taking-up.
It should be noted that the junction of each component is respectively provided in extraction element disclosed in the embodiment of the present invention
There is filter screen, for example, between coarse filtration pipe 1 and activated sludge reaction pond 2, between activated sludge reaction pond 2 and flushing tank 3, punching
Between wash pool 3 and Rose Box 4, Rose Box 4 and blend between pipe 5, it is next to prevent the bulky grain in a upper construction system from entering
In construction system.
As one of embodiment, the extraction element of selenium further includes reserve tank 8, wherein for filling activity in reserve tank 8
Sludge and activated sludge sponge, after activated sludge sponge 21 completes to rinse in flushing tank 3, hook in 7 flushing tank 3 of pulley assembly
Activated sludge sponge 21 is played, then activated sludge sponge 21 is put into reserve tank 8, then is hooked from the bottom of reserve tank 8 new
Activated sludge sponge 21 is transported in activated sludge reaction pond 3.
The specific location of reserve tank 8 is without limiting, but reserve tank 8 need to be disposed in proximity to the position of pulley assembly 7, with
Smoothly replacement convenient to activated sludge sponge 21.
Certainly, the present invention is for the type of activated sludge without limiting, it is preferred to use by the ASBR of domestication
(anaerobic sequencing batch reactor) activated sludge is tested.The preferred municipal wastewater treatment plant of activated sludge is dirty
Mud.
A kind of extracting method of selenium is also disclosed in the embodiment of the present invention, comprising: 1) selenium-containing wastewater is carried out coarse filtration, obtain
One waste water；2) first waste water is reacted with the activated sludge sponge containing activated sludge, is obtained after reacting preset time
To the second waste water and selenium-containing active sludge sponge；3) sponge of the selenium-containing active sludge is rinsed, obtains first containing selenium
Objective microbe solution；4) the first objective microbe containing selenium solution is filtered, obtains the second objective microbe containing selenium
Solution；5) the second objective microbe containing selenium solution is cracked, obtains Se solution；6) Se solution is filtered
Obtain elemental selenium.
The filter medium that fair amount is loaded first in coarse filtration pipe 1, filter medium is imported in coarse filtration pipe 1 and is carried out
First processing, the big material grains in selenium-containing wastewater are removed, and treated for the first time, and selenium-containing wastewater enters activated sludge reaction pond 2
Activated sludge in neutralization activity sludge sponge 21 is reacted, and the microorganism in activated sludge can be adsorbed in the first waste water
Activated sludge sponge 21 is put into progress clear water flushing in flushing tank 3 after the default reaction time by selenium, by activated sludge sea
Microorganism containing selenium in silk floss 21 is molten into clear water, and it is molten to form the first objective microbe containing selenium after microorganism containing selenium and clear water mixing
Liquid obtains the second solution of objective microbe containing selenium after being filtered the first solution of objective microbe containing selenium by Rose Box 4, lead to
It crosses and blends pipe 5 and crack the second solution of objective microbe containing selenium, Se solution is formed after blending, finally by selenium filter tip 6
Elemental selenium is obtained after being filtered to Se solution.The device can effectively extract selenium resource from selenium-containing wastewater, from
And the loss of selenium resource is avoided, environmental resource is protected, the mankind have been benefited.
It should be noted that the mass ratio of the amount of fill of activated sludge and the first waste water is 1:10, reaction preset time is
20 periods.
In order to compare the removal rate of selenium in selenium-containing wastewater, the concentration of selenium is different in selenium-containing wastewater and pH value is different feelings
Condition carries out 3 groups of different experiments.
Following experiments test sludge used and are derived from municipal wastewater treatment plant oxidation ditch work using ordinary activated sludge as seed sludge
The activated sludge of skill；The mass ratio of the loadings of activated sludge and the first wastewater flow rate is 1:10.
Experiment 1:
Activated sludge is added in activated sludge reaction pond 3, the initial concentration of selenium is 1mg/L, pH value in selenium-containing wastewater
It is 7, for temperature setting in 25 DEG C, runing time is 20 periods, and measuring method measurement each period of spectrophotometer goes out
The selenium concentration of water calculates the removal rate of its selenium, and the removal rate of experiment discovery selenium is up to 97%.
Experiment 2:
Activated sludge is added in activated sludge reaction pond 3, the initial concentration of selenium is 4mg/L, pH value in selenium-containing wastewater
It is 7, for temperature setting in 25 DEG C, runing time is 20 periods, and measuring method measurement each period of spectrophotometer goes out
The selenium concentration of water calculates the removal rate of its selenium, and the removal rate of experiment discovery selenium is up to 87%.
Experiment 3:
Activated sludge is added in activated sludge reaction pond 3, the initial concentration of the Selenium in Wastewater containing selenic acid is 4mg/L,
PH value is 5, and for temperature setting in 25 DEG C, runing time is 10 periods, and the measuring method of spectrophotometer measures each week
The selenium concentration of phase water outlet calculates the removal rate of its selenium, the removal rate average out to 72% of experiment discovery selenium.
By 3 groups of Comparison of experiment results it is found that removal when the removal effect of selenium is high concentration compared with selenium when selenium is low dense
Effect is preferable；In the different high-concentration waste water of pH, the removal effect of selenium is compared with the removal effect that pH is 5 in the acid waste water that pH is 7
Fruit is good.It is therefore proposed that can suitably dilute for the selenium-containing wastewater handled or the neutral present apparatus that enters is kept to carry out selenium
Extraction.
Attached drawing 6-8 is please referred to, 4 reaction times is had chosen from experiment 1 respectively in attached drawing 6-8, is had chosen from experiment 2
It has chosen and is embodied histogram by way of 2 reaction times from experiment 33 reaction times.
It should be noted that the time of each reaction time is 3-6 hour.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of extraction element of selenium characterized by comprising
For filtering the coarse filtration pipe (1) of selenium-containing wastewater, the first waste water is obtained after filtering；
For carrying out the activated sludge reaction pond (2) of activated sludge reaction, and it is provided with and contains in the activated sludge reaction pond (2)
The activated sludge sponge (21) of active sludge, the activated sludge sponge (21) and the first waste water reaction preset time
Afterwards, the second waste water and selenium-containing active sludge sponge are obtained；
For carrying out the flushing tank (3) of clear water flushing to the selenium-containing active sludge sponge, the first target containing selenium is obtained after flushing
Microbial solution；
Rose Box (4) for the first objective microbe containing selenium solution to be filtered, obtains the second mesh containing selenium after filtering
Mark microbial solution；
Pipe (5) are blended for crack the second objective microbe containing selenium solution, obtain Se solution after cracking；
Selenium filter tip (6) for the Se solution to be filtered, obtains elemental selenium after filtering.
2. the extraction element of selenium according to claim 1, which is characterized in that
It is provided with filter screen (11) and lower filter screen (12) in the coarse filtration pipe (1), the upper filter screen (11) and described
Filter medium is filled between lower filter screen (12)；
The upper filter screen (11) is detachable filter screen, and the lower filter screen (12) is fixed filter screen.
3. the extraction element of selenium according to claim 1, which is characterized in that coarse filtration pipe (1) subscript has for adjusting
Control the graduation mark of the filter medium (13).
4. the extraction element of selenium according to claim 1, which is characterized in that the activated sludge reaction pond (2) with it is described
Coarse filtration pipe (1) is connected, and is provided with sponge net between the activated sludge reaction pond (2) and the coarse filtration pipe (1)
(13)。
5. the extraction element of selenium according to claim 1, which is characterized in that further include:
For wrapping up the silk screen of the activated sludge sponge (21)；
Pulley assembly (7)；
The pulley assembly (7) is connected with the silk screen, and the pulley assembly (7) can turn the activated sludge sponge (21)
It moves on in the flushing tank (3)；
Sieve (31) are provided in the flushing tank (3).
6. the extraction element of selenium according to claim 1, which is characterized in that the flushing tank (3) and the Rose Box (4)
It is connected, is provided with filter medium in the Rose Box (4).
7. the extraction element of selenium according to claim 1, which is characterized in that the Rose Box (4) and described blend pipe (5)
It is connected, described blend in pipe (5) is provided with several rotary wind type impellers (51), and the rotary wind type impeller (51) and motor are electrically connected
It connects.
8. the extraction element of selenium according to claim 1, which is characterized in that further include drainage (9), the selenium filter tip
(6) it is set to the drainage (9) and described blend between pipe (5) and be connected with the drainage (9) and the pipe (5) that blends
Logical, the selenium filter tip (6) includes the first filter membrane (61) and the second filter membrane (62), first filter membrane (61) and second filter membrane
(62) there is gap between.
9. a kind of extracting method of selenium characterized by comprising
1) selenium-containing wastewater is subjected to coarse filtration, obtains the first waste water；
2) first waste water is reacted with the activated sludge sponge containing activated sludge, obtains the after reacting preset time
Two waste water and selenium-containing active sludge sponge；
3) sponge of the selenium-containing active sludge is rinsed, obtains the first solution of objective microbe containing selenium；
4) the first objective microbe containing selenium solution is filtered, obtains the second solution of objective microbe containing selenium；
5) the second objective microbe containing selenium solution is blended, obtains Se solution；
6) it is filtered the Se solution to obtain elemental selenium.
10. selenium Resource Access method according to claim 9, which is characterized in that the amount of fill of the activated sludge and institute
The mass ratio for stating the first waste water is 1:10.
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| CN103249682A (en) * | 2010-12-17 | 2013-08-14 | 通用电气公司 | Biochemical process for selenium recovery from bioremediation effluent or sludge |
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| CN114057339A (en) * | 2020-08-05 | 2022-02-18 | 安琪酵母股份有限公司 | Method for recycling selenium source in selenium-enriched yeast fermentation process and treatment system of selenium-containing wastewater |
| CN114057339B (en) * | 2020-08-05 | 2023-04-07 | 安琪酵母股份有限公司 | Method for recycling selenium source in selenium-enriched yeast fermentation process and treatment system of selenium-containing wastewater |
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