CN112174440B - Heavy metal wastewater treatment process - Google Patents
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- 238000000034 method Methods 0.000 title claims abstract description 47
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 38
- 230000008569 process Effects 0.000 title claims abstract description 35
- 238000004065 wastewater treatment Methods 0.000 title claims description 14
- 239000010802 sludge Substances 0.000 claims abstract description 45
- 238000001179 sorption measurement Methods 0.000 claims abstract description 29
- 238000005189 flocculation Methods 0.000 claims abstract description 24
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims abstract description 22
- 241000894006 Bacteria Species 0.000 claims abstract description 19
- 239000002351 wastewater Substances 0.000 claims abstract description 19
- 230000001603 reducing effect Effects 0.000 claims abstract description 18
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 17
- 230000016615 flocculation Effects 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 11
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000001556 precipitation Methods 0.000 claims abstract description 9
- 229910001448 ferrous ion Inorganic materials 0.000 claims abstract description 8
- 239000002002 slurry Substances 0.000 claims abstract description 6
- 238000004062 sedimentation Methods 0.000 claims description 24
- 239000000203 mixture Substances 0.000 claims description 18
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 239000013049 sediment Substances 0.000 claims description 4
- 239000006228 supernatant Substances 0.000 claims description 4
- 239000012141 concentrate Substances 0.000 claims description 3
- 238000012258 culturing Methods 0.000 claims description 3
- 230000014759 maintenance of location Effects 0.000 claims description 3
- 239000012466 permeate Substances 0.000 claims description 3
- 241000193830 Bacillus <bacterium> Species 0.000 claims description 2
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- 241000194017 Streptococcus Species 0.000 claims description 2
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- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/34—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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- 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
- C02F11/02—Biological treatment
-
- 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
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/046—Recirculation with an external loop
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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
- 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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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
- C02F3/345—Biological treatment of water, waste water, or sewage characterised by the microorganisms used for biological oxidation or reduction of sulfur compounds
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
A process for treating heavy metal wastewater comprises (1) flocculation treatment and (2) solid-liquid treatmentSeparation, (3) biological adsorption, (4) precipitation, (5) culture, (6) secondary precipitation, (7) ultrafiltration: and RO process, before the excess sludge is used for adsorbing heavy metal, flocculation treatment is carried out, excess sludge slurry is added in the flocculation treatment, because the excess sludge is sludge containing oil and meeting the requirements of sulfate reducing bacteria, and the treated waste water contains sulfate, the excess sludge contains S 2‑ FeS nano particles are formed under the action of adding ferrous ions and can reduce heavy metal ions (such as Cr) 6+ ) And forming insoluble particles with heavy metal ions, and settling under the action of ferrous/ferric salt.
Description
Technical Field
The invention belongs to the field of wastewater treatment, and particularly relates to a heavy metal wastewater treatment process.
Background
In industrial production, a large amount of sewage containing heavy metals is generated in the industries of electroplating, electronics, ore dressing, metallurgy, chemical engineering, automobiles and the like, the sewage enters the nature without being treated, is continuously enriched through a biological chain, even can be absorbed by plants and harms the human health through a food chain, and the heavy metal ion biological treatment agent has the characteristics of high toxicity, strong durability and the like, and has no self-cleaning and biodegradation capacity in the nature. At present, the methods for treating heavy metal sewage at home and abroad mainly comprise a chemical precipitation method, an adsorption method, an electrolysis method, an ion exchange method, a reverse osmosis method and the like. The adsorption method is one of common methods for treating the heavy metal polluted wastewater, and compared with the traditional treatment methods such as a chemical precipitation method, a membrane separation method, an electrochemical method, an ion exchange method and the like, the adsorption method has the advantages that the defects of large reagent consumption, easiness in causing secondary pollution, complex technical process, complex management, higher operation cost, high energy consumption, unsuitability for treating the low-concentration heavy metal wastewater and the like are overcome; but has various advantages: the adsorbent has the advantages of rich raw material sources, various varieties, simple treatment equipment by an adsorption method, flexible, convenient and safe operation process, stable and efficient treatment effect, low energy consumption, low operation cost, no secondary pollution, strong practicability and easy popularization.
The research shows that sulfate is reduced into H by biological reduction reaction of dissimilatory sulfate by using sulfate reducing bacteria 2 S, and using certain microorganisms to transform H 2 S is oxidized to elemental sulfur to produceThe sulfide of (a) is combined with the heavy metal to form a metal sulfide precipitate. However, in the treatment process of the sulfate reducing bacteria, the toxicity of heavy metals and the COD content in water have a prominent problem of inhibiting the sulfate reducing bacteria, so that the removal rate of the heavy metals is influenced, and the application of the sulfate reducing bacteria in the practice of treating heavy metal wastewater is not facilitated. Therefore, a process suitable for heavy metal wastewater treatment is urgently needed.
Disclosure of Invention
The invention aims to provide a heavy metal wastewater treatment process.
In order to solve the technical problem, the invention discloses a heavy metal wastewater treatment process, which comprises the following steps: (1) flocculation treatment: introducing the wastewater into a flocculation process for flocculation treatment, wherein ferrous ions are added in the flocculation process, and the adding amount of the ferrous ions is 50-200mg/L;
(2) Solid-liquid separation: carrying out solid-liquid separation treatment on the effluent of the flocculation process;
(3) Biological adsorption: introducing clear liquid after solid-liquid separation into a biological adsorption tank for biological adsorption, and adding excess sludge into the biological adsorption tank, wherein dominant strains in the excess sludge are composite sulfate reducing bacteria;
(4) And (3) precipitation: conveying the mud-water mixture in the biological adsorption tank to a sedimentation tank for sedimentation treatment;
(5) Culturing: conveying the precipitated sludge to a culture pond, conveying the supernatant to an RO process, and conveying the mixture in the acidification pond to the culture pond;
(6) Secondary precipitation: conveying the mixture in the culture tank to a secondary sedimentation tank for fractional sedimentation, and dividing the mixture into an upper clear water layer, a middle sludge layer and a bottom sediment layer;
(7) And (3) ultrafiltration: a sludge discharge pipe is arranged in the middle of the secondary sedimentation tank, the sludge-water mixture of the upper clear water layer and the middle sludge layer in the secondary sedimentation tank is conveyed to an ultrafiltration device for ultrafiltration treatment, the ultrafiltration permeate is conveyed to the RO process, and the ultrafiltration concentrate is conveyed to a biological adsorption tank;
further, a biological flocculant is added in the flocculation process, wherein the biological flocculant is biological slurry obtained after the excess sludge is treated by a cracking process;
further, the excess sludge is the excess sludge produced by the sulfate-containing sewage treatment process;
furthermore, the cracking process is ultrasonic treatment;
furthermore, the retention time of the wastewater in the biological adsorption tank is 25-40min, and the MLSS is controlled to be 6000-10000ppm;
further, straw and the wastewater are added into the acidification tank for acidification treatment;
further, hydrolytic acidification sludge is added into the acidification tank;
further, conveying the concentrated solution of the RO process to the culture pond;
further, the mixture in the acidification pool is conveyed to the culture pool for ultrasonic cracking treatment;
further, the sound energy density during the ultrasonic cracking treatment is 0.580-0.900W/ml;
further, residual activated sludge is added into the acidification tank to carry out anaerobic acidification;
further, the pH value in the culture pond and the secondary sedimentation pond is controlled to be 7.0-7.5;
further, adding iron powder into the sedimentation tank, wherein the adding amount is 1.5-5g/L;
further, the compound sulfate reducing bacteria are two or more of vibrio desulfovii, bacillus desulfurativa, enterobacter desulfurativa and streptococcus desulfurativa.
The heavy metal wastewater treatment process disclosed by the invention at least has the following advantages:
1. before the excess sludge is used for adsorbing heavy metals, flocculation treatment is carried out, excess sludge slurry is added in the flocculation treatment, the excess sludge is sludge containing oil and meeting the requirement of sulfate reducing bacteria, the treated wastewater contains sulfate, and the excess sludge contains S 2- FeS nano particles are formed under the action of adding ferrous ions and can reduce heavy metal ions (such as Cr) 6+ ) And forming insoluble particles with heavy metal ions, and settling under the action of ferrous/ferric salt;
2. benefit toThe excess sludge containing the composite sulfate reducing bacteria as the dominant bacteria is used for biological adsorption, and the reductase produced by the composite sulfate reducing bacteria has the function of catalyzing to produce S 2- Meanwhile, the composite sulfate reducing bacteria have the biological flocculation effect of chelating and occluding heavy metal ions, so that the concentration of heavy metal in the wastewater can be quickly reduced;
3. after the heavy metal content is rapidly reduced in the biological adsorption stage, the heavy metal is conveyed to a culture pond for culture through precipitation treatment, and the supernatant is conveyed to an RO process for treatment, so that the load of membrane treatment is greatly reduced;
4, conveying the RO concentrated solution into a culture pond to be cultured together with the sludge containing the composite sulfate reducing bacteria, wherein the composite sulfate reducing bacteria can reduce sulfate radicals in the wastewater into S 2- While providing H under the reducing action of the iron powder 2 Accelerating the reduction process of sulfate radical (SO) 4 2- +H 2 →S 2- + H2O), further improving the removal effect of heavy metals;
5. and performing sectional sedimentation in a secondary sedimentation tank, discharging sediment at the bottom, performing ultrafiltration treatment on the mixture of the upper layer and the middle layer to obtain concentrated sludge, returning the concentrated sludge to the biological adsorption tank, and reducing the content of heavy metals in the residual sludge.
Drawings
FIG. 1 is a schematic view of a heavy metal wastewater treatment process;
Detailed Description
The present invention is further described in detail below with reference to examples so that those skilled in the art can practice the invention with reference to the description.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
Example 1
A heavy metal wastewater treatment process comprises the following steps (see figure 1):
(1) Flocculation treatment: introducing the wastewater into a flocculation process for flocculation treatment, wherein ferrous ions are added in the flocculation process, and the adding amount of the ferrous ions is 50-200mg/L;
(2) Solid-liquid separation: performing solid-liquid separation treatment on the effluent of the flocculation process, wherein a biological flocculant is added in the flocculation process, the biological flocculant is biological slurry obtained by performing cracking process treatment on the excess sludge, the excess sludge is excess sludge generated by a sulfate-containing sewage treatment process, and the adding amount of the biological slurry is 10-50ml/L;
(3) Biological adsorption: introducing acid mine wastewater into a biological adsorption tank for biological adsorption, adding excess sludge into the biological adsorption tank, wherein the dominant bacteria in the excess sludge are composite sulfate reducing bacteria, the retention time of the wastewater in the biological adsorption tank is 30min, and the MLSS is controlled at 8000ppm;
(4) And (3) precipitation: conveying the sludge-water mixture in the biological adsorption tank to a sedimentation tank for sedimentation treatment, and adding iron powder into the sedimentation tank, wherein the adding amount is 2g/L;
(5) Culturing: conveying the precipitated sludge to a culture tank for anaerobic culture, controlling the pH to be 7.0-7.5 and the HRT to be 6-12h, conveying the supernatant to an RO process, and conveying the mixture in an acidification tank to the culture tank;
(6) Secondary precipitation: conveying the mixture in the culture tank to a secondary sedimentation tank for fractional sedimentation, and dividing the mixture into an upper clear water layer, a middle sludge layer and a bottom sediment layer;
(7) And (3) ultrafiltration: and a sludge discharge pipe is arranged in the middle of the secondary sedimentation tank, the sludge-water mixture of the upper clear water layer and the middle sludge layer in the secondary sedimentation tank is conveyed to an ultrafiltration device for ultrafiltration treatment, the ultrafiltration permeate is conveyed to the RO process, and the ultrafiltration concentrate is conveyed to a biological adsorption tank.
Through controlling the pH value in the culture pond, the removal rate of heavy metals in the acid mine wastewater is determined: wherein the removal rate exceeds 95% at pH 7-7.5 and reaches 98.7 at pH 7.3. While the removal rates were only 81.5, 83.7 and 86.1 at pH 5, 5.5 and 6 and 91.4 at pH 8.
Therefore, the removal efficiency of heavy metals in the acidic mine wastewater can be controlled by controlling the pH in the culture pond to be 7.0-7.5, and 95% of heavy metals can be removed.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable to various fields of endeavor for which the invention may be embodied with additional modifications as would be readily apparent to those skilled in the art, and the invention is therefore not limited to the details given herein and to the embodiments shown and described without departing from the generic concept as defined by the claims and their equivalents.
Claims (4)
1. A heavy metal wastewater treatment process is characterized by comprising the following steps: (1) flocculation treatment: introducing the wastewater into a flocculation process for flocculation treatment, wherein ferrous ions are added in the flocculation process, the adding amount of the ferrous ions is 50-200mg/L, and a biological flocculant is added in the flocculation process, (2) solid-liquid separation: carrying out solid-liquid separation treatment on the effluent of the flocculation process; (3) biological adsorption: introducing clear liquid after solid-liquid separation into a biological adsorption tank for biological adsorption, adding excess sludge into the biological adsorption tank, wherein the dominant bacteria in the excess sludge are composite sulfate reducing bacteria, the excess sludge is excess sludge generated in a sulfate-containing sewage treatment process, the retention time of wastewater in the biological adsorption tank is 25-40min, and MLSS is controlled to be 6000-10000ppm; (4) precipitation: conveying the mud-water mixture in the biological adsorption tank to a sedimentation tank for sedimentation treatment; (5) culturing: conveying the precipitated sludge to a culture tank, conveying the supernatant to an RO process, conveying the RO process concentrated solution to the culture tank, conveying the mixture in an acidification tank to the culture tank, adding hydrolysis acidification sludge into the acidification tank, and adding straws and the wastewater into the acidification tank to carry out acidification treatment; (6) secondary precipitation: conveying the mixture in the culture tank to a secondary sedimentation tank for fractional sedimentation, and dividing the mixture into an upper clear water layer, a middle sludge layer and a bottom sediment layer; (7) ultrafiltration: a sludge discharge pipe is arranged in the middle of the secondary sedimentation tank, the sludge-water mixture of the upper clear water layer and the middle sludge layer in the secondary sedimentation tank is conveyed to an ultrafiltration device for ultrafiltration treatment, the ultrafiltration permeate is conveyed to the RO process, and the ultrafiltration concentrate is conveyed to a biological adsorption tank; adding iron powder into the sedimentation tank, wherein the adding amount is 1.5-5g/L; the composite sulfate reducing bacteria are two or more of vibrio desulforii, bacillus desulfurater, enterobacter desulfurater and streptococcus desulfurater, and the biological flocculant is biological slurry obtained by treating the excess sludge through a cracking process.
2. The heavy metal wastewater treatment process of claim 1, wherein the breaking process is ultrasonic treatment.
3. The heavy metal wastewater treatment process of claim 1, wherein the mixture in the acidification tank is subjected to ultrasonic disruption treatment before being conveyed to the culture tank.
4. The heavy metal wastewater treatment process of claim 3, wherein the sound energy density during the ultrasonic disintegration treatment is 0.580-0.900W/ml.
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| CN108977395B (en) * | 2018-07-31 | 2022-03-22 | 李昕 | Preparation method of biological nano material for repairing hexavalent chromium pollution in soil through passivation and solidification |
| CN113943086A (en) * | 2021-11-16 | 2022-01-18 | 山西交控生态环境股份有限公司 | Comprehensive sewage treatment and resource utilization method for expressway operation station area |
| CN115057529A (en) * | 2022-07-12 | 2022-09-16 | 国环电池科技(苏州)有限公司 | Anaerobic biological treatment method for heavy metal wastewater |
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| CN1180994C (en) * | 2003-05-16 | 2004-12-22 | 天津大学 | Method for increasing waste water treating efficiency by improving activity of sulfate reducing bacteria |
| CN1289683C (en) * | 2005-06-18 | 2006-12-13 | 山西大学 | Nano metal sulfide microbe preparing method |
| CN102181495B (en) * | 2011-02-28 | 2013-03-06 | 北京理工大学 | Preparation method of nano-metal sulfide |
| CN102815831B (en) * | 2012-09-19 | 2014-07-30 | 北京格瑞奥环境科技有限公司 | Device and method for treating heavy metal wastewater and recovering heavy metal |
| CN103265142A (en) * | 2013-04-22 | 2013-08-28 | 安徽工程大学 | Method for treating acidic mine waste water |
| CN103265141B (en) * | 2013-04-22 | 2015-03-04 | 安徽工程大学 | Acidic mine waste water treatment system and use method thereof |
| CN104278058B (en) * | 2014-10-22 | 2017-12-12 | 中国矿业大学(北京) | Nanometer Fe S method and its application are generated in acid mine water situ using microorganism |
| CN106007001B (en) * | 2016-06-29 | 2019-04-09 | 华南理工大学 | The method that sponge iron cooperates with removing sulfate and Zn (II) waste water with microorganism |
| CN106430811A (en) * | 2016-08-30 | 2017-02-22 | 陈亚松 | Highly toxic waste water pre-treatment device and use method thereof |
| CN106565055A (en) * | 2016-09-30 | 2017-04-19 | 江南大学 | Deep nitrogen removal method for sewage |
| CN107973406B (en) * | 2017-12-12 | 2023-10-03 | 广州市蕴泰电力成套设备有限公司 | Device and method for separating organic matters and ammonia nitrogen in sewage |
| CN111072224B (en) * | 2019-12-24 | 2021-10-26 | 华南理工大学 | Wastewater treatment method for synchronously removing organic matters, sulfate radicals, heavy metals and total nitrogen |
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