CN108455770A - A kind of method of ultrasound-enhanced processing high concentration chrome wastewater - Google Patents
A kind of method of ultrasound-enhanced processing high concentration chrome wastewater Download PDFInfo
- Publication number
- CN108455770A CN108455770A CN201810205913.5A CN201810205913A CN108455770A CN 108455770 A CN108455770 A CN 108455770A CN 201810205913 A CN201810205913 A CN 201810205913A CN 108455770 A CN108455770 A CN 108455770A
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- sewage
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- ultrasound
- chromium
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
- C02F1/36—Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations
-
- 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
-
- 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
- C02F1/70—Treatment of water, waste water, or sewage by reduction
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention discloses a kind of methods of ultrasound-enhanced processing high concentration chrome wastewater, including step：1) FeSO at room temperature, is added into cesspool4And FeCl2At least one of, make the Fe in pond2+With Cr6+Molar ratio be more than 6:1；2) after 1~10min of ferrous reactant salt is added, sewage in cesspool is pumped into neutralization pond by elevator pump；And the NaOH solution that mass fraction is 1~51% is added into neutralization pond from Piping Centrifugal Pumps, pH value is adjusted to 7.5~9.5；3) sewage is transferred to oxidation pond, after making oxidation pond be warming up to 20~50 DEG C, starts to be aerated into sewage, and apply the ultrasound that power is 50~500W to sewage, sewage is made to react 5~60min under ultrasonication；4) it chromium sediment sewage will be contained by sludge pump is pumped into filter press and be separated by solid-liquid separation, and isolate chromium-bearing sludge.Compared with traditional ferrite precipitation method, the reaction time shortens the present invention, and the temperature for obtaining ferrite precipitation is lower, and energy consumption is lower, and the removal rate higher of chromium.
Description
Technical field
The present invention relates to a kind of technical field of sewage, more particularly to a kind of method of processing high concentration chrome wastewater.
Background technology
All contain a large amount of chromium, mistake in the industrial wastewater of many industries such as smelting, plating, intermetallic composite coating, process hides, printing and dyeing
The chromium of amount also can generate toxic action to environmental and biological materials.Country《Integrated wastewater discharge standard》(GB 8978-1996) is provided
Cr VI maximum concentration is 0.5mg/L in the waste water of industrial discharge, and the maximum concentration of total chromium is 1.5mg/L.Currently, chromate waste water
Processing method mainly have chemical precipitation method, activated carbon method, electrolysis, ion-exchange and membrane processing method etc., compare with top
Chemical precipitation method has the advantages that one-time investment is small, operating cost is low, high treating effect, operational administrative are easy in method, in crowd
With traditional ferrite precipitation method application hair the widest in more precipitation method, but the method needs to provide 70 DEG C of reaction temperature, energy consumption
It is higher.
Invention content
In view of this, the present invention provides a kind of method of ultrasound-enhanced processing high concentration chrome wastewater, solution is adopted in the prior art
The chromium in sewage is removed with the ferrite precipitation method there is technical issues that.
The method of the ultrasound-enhanced processing high concentration chrome wastewater of the present invention, includes the following steps：
1) FeSO at room temperature, is added into cesspool4And FeCl2At least one of, make the Fe in cesspool2+With Cr6 +Molar ratio be more than 6:1；In this step, by ensureing Fe2+With Cr6+Molar ratio be more than 6:1, it can be by the Cr in sewage6+It fills
That divides is reduced into Cr3+；
2) after 1~10min of ferrous reactant salt is added, sewage in cesspool is pumped into neutralization pond by elevator pump；And by pipe
The NaOH solution that mass fraction is 1~51% is added into neutralization pond for road centrifugal pump, and pH value is adjusted to 7.5~9.5；This step is logical
It crosses addition NaOH solution and pH value of sewage water is adjusted to alkalinity so that NaOH energy and Fe2+And Fe3+Reaction generates Fe (OH)2And Fe
(OH)3, and and Cr3+Reaction generates Cr (OH)3, to make Cr3Co-precipitation in into ferrite；
3) sewage that pH value is adjusted to 7.5~9.5 is transferred to oxidation pond, and oxidation pond is made to be warming up to 20~50 DEG C, then to sewage
Middle aeration, and apply the ultrasound that power is 50~500W to sewage, so that sewage is reacted 5~60min under ultrasonication；This step
It, can be by part Fe by being aerated to oxidation pond2+It is oxidized to Fe3+, so as to make remaining Cr in sewage3+Replace Fe3+It generates
Cr(OH)3；And by applying ultrasound into sewage, the destruction and hydrolysis of hydroxide colloid can be accelerated, accelerate Cr3+It replaces
Fe3+Generate Cr (OH)3, reaction required temperature is reduced, shortens the reaction time, improves the removal rate of chromium；
4) it chromium sediment sewage will be contained by sludge pump is pumped into filter press and be separated by solid-liquid separation, and isolate chromium-bearing sludge.
Beneficial effects of the present invention：
The method of the ultrasound-enhanced processing high concentration chrome wastewater of the present invention, compared with traditional ferrite precipitation method, by sewage
The reaction temperature of oxidation pond can be reduced to 50 DEG C to generate ferrite hereinafter, reacting by middle application ultrasound from existing 70 DEG C or so
Temperature needed for precipitation reduces significantly, and sewage disposal energy consumption is lower, and with the increasing of ultrasonic power, and the reaction time can also be apparent
Shorten, and the removal rate higher of chromium.
Description of the drawings
Fig. 1 is the flow chart of the method for ultrasound-enhanced processing high concentration chrome wastewater in embodiment.
Specific implementation mode
The invention will be further described with reference to the accompanying drawings and examples.
Embodiment 1
At room temperature, a certain amount of FeSO is added into cesspool4, control n in sewageFe2+:n Cr6+=8:1.It is being added
FeSO4After react 1min, sewage is pumped into neutralization pond by elevator pump after the completion of reaction.Added again from Piping Centrifugal Pumps into neutralization pond
Enter the NaOH solution that mass fraction is 1%, after pH value is adjusted to 7.5, then sewage is transferred to oxidation pond；Certainly in different embodiments
In, neutralization pond and oxidation pond can be integrated as oxidation pond is neutralized, and can remove the step that sewage is transferred to oxidation pond in this way
Suddenly.Then so that oxidation pond is warming up to 50 DEG C, start to be aerated into sewage, and apply the ultrasound that power is 50W to sewage, make sewage
60min is reacted under ultrasonication, will contain chromium sediment sewage by sludge pump after the completion of reaction is pumped into filter press progress press filtration, pressure
It filters the water isolated and is recycled after horizontal flow basin, inclined plate tank and adsorption tower successively and used, the chromium-bearing sludge that press filtration is isolated is into pan feeding
.
Embodiment 2
At room temperature, a certain amount of FeSO is added into cesspool4And FeCl2Mixed solution controls n in sewageFe2+:nCr6+=7.5:1.FeSO is being added4And FeCl210min is reacted after mixed solution, is pumped into sewage by elevator pump after the completion of reaction
Neutralization pond.The NaOH solution that mass fraction is 5% is added into neutralization pond from Piping Centrifugal Pumps again, after pH value is adjusted to 8, then will
Sewage is transferred to oxidation pond；Certainly in different embodiments, neutralization pond and oxidation pond can be integrated as oxidation pond is neutralized, this
Sample can remove the step of sewage is transferred to oxidation pond.Then so that oxidation pond is warming up to 40 DEG C, start to be aerated into sewage, and to
Sewage applies the ultrasound that power is 300W, so that sewage is reacted 10min under ultrasonication, will contain chromium by sludge pump after the completion of reaction
Sediment sewage is pumped into filter press and carries out press filtration, and the water that press filtration is isolated recycles after horizontal flow basin, inclined plate tank and adsorption tower successively
It uses, the chromium-bearing sludge that press filtration is isolated enters stock ground.
Embodiment 3
At room temperature, a certain amount of FeCl is added into cesspool2, control n in sewageFe2+:n Cr6+=7:1.It is being added
FeCl2After react 7min, sewage is pumped into neutralization pond by elevator pump after the completion of reaction.Added again from Piping Centrifugal Pumps into neutralization pond
Enter the NaOH solution that mass fraction is 10%, after pH value is adjusted to 8.5, then sewage is transferred to oxidation pond；Certainly in different implementations
In example, neutralization pond and oxidation pond can be integrated as oxidation pond is neutralized, and can remove in this way sewage being transferred to oxidation pond
Step.Then so that oxidation pond is warming up to 30 DEG C, start to be aerated into sewage, and apply the ultrasound that power is 200W to sewage, make
Sewage reacts 20min under ultrasonication, by sludge pump will contain chromium sediment sewage after the completion of reaction and be pumped into filter press and press
Filter, the water that press filtration is isolated successively after horizontal flow basin, inclined plate tank and adsorption tower recycle use, the chromium-bearing sludge that press filtration is isolated into
Enter stock ground.
Embodiment 4
At room temperature, a certain amount of FeCl is added into cesspool2, control n in sewageFe2+:n Cr6+=6.5:1.Adding
Enter FeCl2After react 10min, sewage is pumped into neutralization pond by elevator pump after the completion of reaction.Again from Piping Centrifugal Pumps to neutralization pond
The middle NaOH solution that mass fraction is added and is 50%, after pH value is adjusted to 9, then by sewage is transferred to oxidation pond；Certainly in different realities
It applies in example, neutralization pond and oxidation pond can be integrated as oxidation pond is neutralized, and can remove in this way sewage being transferred to oxidation pond
The step of.Then so that oxidation pond is warming up to 35 DEG C, start to be aerated into sewage, and apply the ultrasound that power is 500W to sewage,
So that sewage is reacted 5min under ultrasonication, chromium sediment sewage will be contained by sludge pump after the completion of reaction be pumped into filter press and press
Filter, the water that press filtration is isolated successively after horizontal flow basin, inclined plate tank and adsorption tower recycle use, the chromium-bearing sludge that press filtration is isolated into
Enter stock ground.
Embodiment 5
At room temperature, a certain amount of FeSO is added into cesspool4, control n in sewageFe2+:n Cr6+=6.5:1.Adding
Enter FeSO4After react 10min, sewage is pumped into neutralization pond by elevator pump after the completion of reaction.Again from Piping Centrifugal Pumps to neutralization pond
The middle NaOH solution that mass fraction is added and is 30%, after pH value is adjusted to 8, then by sewage is transferred to oxidation pond；Certainly in different realities
It applies in example, neutralization pond and oxidation pond can be integrated as oxidation pond is neutralized, and can remove in this way sewage being transferred to oxidation pond
The step of.Then so that oxidation pond is warming up to 30 DEG C, start to be aerated into sewage, and apply the ultrasound that power is 300W to sewage,
Sewage is set to react 15min under ultrasonication, will contain chromium sediment sewage by sludge pump after the completion of reaction is pumped into filter press progress
Press filtration, the water that press filtration is isolated recycle after horizontal flow basin, inclined plate tank and adsorption tower use successively, the chromium-bearing sludge that press filtration is isolated
Into stock ground.
Finally illustrate, the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although with reference to compared with
Good embodiment describes the invention in detail, it will be understood by those of ordinary skill in the art that, it can be to the skill of the present invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the right of invention.
Claims (1)
1. a kind of method of ultrasound-enhanced processing high concentration chrome wastewater, it is characterised in that：Include the following steps：
1) FeSO at room temperature, is added into cesspool4And FeCl2At least one of, make the Fe in cesspool2+With Cr6+'s
Molar ratio is more than 6:1；
2) after 1~10min of ferrous reactant salt is added, sewage in cesspool is pumped into neutralization pond by elevator pump；And by pipeline from
The NaOH solution that mass fraction is 1~51% is added into neutralization pond for heart pump, and pH value is adjusted to 7.5~9.5；
3) sewage that pH value is adjusted to 7.5~9.5 is transferred to oxidation pond, so that oxidation pond is warming up to 20~50 DEG C, then exposed into sewage
Gas, and apply the ultrasound that power is 50~500W to sewage, so that sewage is reacted 5~60min under ultrasonication；
4) it chromium sediment sewage will be contained by sludge pump is pumped into filter press and be separated by solid-liquid separation, and isolate chromium-bearing sludge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810205913.5A CN108455770A (en) | 2018-03-13 | 2018-03-13 | A kind of method of ultrasound-enhanced processing high concentration chrome wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810205913.5A CN108455770A (en) | 2018-03-13 | 2018-03-13 | A kind of method of ultrasound-enhanced processing high concentration chrome wastewater |
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| Publication Number | Publication Date |
|---|---|
| CN108455770A true CN108455770A (en) | 2018-08-28 |
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| CN201810205913.5A Pending CN108455770A (en) | 2018-03-13 | 2018-03-13 | A kind of method of ultrasound-enhanced processing high concentration chrome wastewater |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109735722A (en) * | 2018-12-17 | 2019-05-10 | 内蒙古科技大学 | Removal contains Cd, Pb, As heavy metal ion and CN from waste residue-The method of ion |
| CN111732314A (en) * | 2020-06-29 | 2020-10-02 | 重庆工程职业技术学院 | Method for treating excess sludge of sewage treatment plant |
| CN114231761A (en) * | 2022-03-01 | 2022-03-25 | 生态环境部华南环境科学研究所 | Electroplating sludge chromium element extraction device and method with ultrasonic generator |
| CN114250374A (en) * | 2022-03-01 | 2022-03-29 | 生态环境部华南环境科学研究所 | Method for efficiently extracting chromium from electroplating sludge by utilizing ultrasonic oxidation technology |
| CN115490393A (en) * | 2022-08-22 | 2022-12-20 | 杭州能源环境工程有限公司 | Treatment method for enhancing biodegradability of kitchen waste biogas slurry and sludge recovery capacity |
-
2018
- 2018-03-13 CN CN201810205913.5A patent/CN108455770A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109735722A (en) * | 2018-12-17 | 2019-05-10 | 内蒙古科技大学 | Removal contains Cd, Pb, As heavy metal ion and CN from waste residue-The method of ion |
| CN111732314A (en) * | 2020-06-29 | 2020-10-02 | 重庆工程职业技术学院 | Method for treating excess sludge of sewage treatment plant |
| CN114231761A (en) * | 2022-03-01 | 2022-03-25 | 生态环境部华南环境科学研究所 | Electroplating sludge chromium element extraction device and method with ultrasonic generator |
| CN114250374A (en) * | 2022-03-01 | 2022-03-29 | 生态环境部华南环境科学研究所 | Method for efficiently extracting chromium from electroplating sludge by utilizing ultrasonic oxidation technology |
| CN114231761B (en) * | 2022-03-01 | 2022-05-06 | 生态环境部华南环境科学研究所 | Electroplating sludge chromium element extraction device and method with ultrasonic generator |
| CN114250374B (en) * | 2022-03-01 | 2022-05-10 | 生态环境部华南环境科学研究所 | Method for efficiently extracting chromium from electroplating sludge by utilizing ultrasonic oxidation technology |
| CN115490393A (en) * | 2022-08-22 | 2022-12-20 | 杭州能源环境工程有限公司 | Treatment method for enhancing biodegradability of kitchen waste biogas slurry and sludge recovery capacity |
| CN115490393B (en) * | 2022-08-22 | 2023-09-05 | 杭州能源环境工程有限公司 | Treatment method for enhancing biodegradability of kitchen waste biogas slurry and sludge recovery capacity |
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Application publication date: 20180828 |
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