CN111362419A - Biochemical treatment system for mine acidic wastewater - Google Patents
Biochemical treatment system for mine acidic wastewater Download PDFInfo
- Publication number
- CN111362419A CN111362419A CN201811601184.1A CN201811601184A CN111362419A CN 111362419 A CN111362419 A CN 111362419A CN 201811601184 A CN201811601184 A CN 201811601184A CN 111362419 A CN111362419 A CN 111362419A
- Authority
- CN
- China
- Prior art keywords
- reactor
- microbial
- wastewater
- oxidation
- mine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
-
- 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
- C02F3/30—Aerobic and anaerobic processes
-
- 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
- C02F2101/101—Sulfur compounds
-
- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/203—Iron or iron compound
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
-
- 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
- C02F2209/02—Temperature
-
- 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
- C02F2209/04—Oxidation reduction potential [ORP]
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Activated Sludge Processes (AREA)
Abstract
A biochemical treatment system for mine acidic wastewater comprises a microbial oxidation iron removal reactor, a microbial sulfate reduction reactor and a culture medium adding unit. The invention aims to solve the technical problems of large dosage of alkaline chemical agents, more generated sediment slag and high operating cost in the current mine acidic wastewater treatment process. The technical method of the invention mainly utilizes the oxidation and reduction of microorganisms to realize the lifting of the pH value of the acid mine wastewater and the removal of heavy metals, and has the advantages that: (1) alkaline chemical agents such as lime and the like are not used, so that the generation amount of the precipitation slag is correspondingly greatly reduced, the operation cost is obviously reduced, and the treatment process is more green; (2) the labor amount is obviously reduced in the running process, and the operation is more convenient.
Description
Technical Field
The invention belongs to the field of metallurgy, and relates to a biochemical treatment system for acid mine wastewater.
Background
In the mining process of nonferrous metal mines, acidic wastewater is discharged, which contains heavy metal ions such as copper, zinc, iron and the like, and causes adverse influence on the surrounding ecological environment.
The most common processes for treating acidic mine wastewater at home and abroad are lime neutralization and lime-sulfide precipitation, and alkaline medicaments are added to raise the pH value of the acidic mine wastewater and remove heavy metals. However, in the process of adding lime, a large amount of gypsum slag containing heavy metals is generated, and the gypsum slag belongs to dangerous waste, so that the waste water treatment is high, and the environmental risk of secondary pollution is brought.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a biochemical treatment system for mine acidic wastewater, which can solve the technical problem of large amount of gypsum slag in the existing mine acidic wastewater, avoid the use of alkaline chemical agents in treatment engineering, realize the lifting of pH and the removal of heavy metals by the oxidation and reduction of microorganisms in the whole process, and realize the resource recovery of valuable metals in the mine acidic wastewater.
In order to achieve the above object, the present invention provides a system for biochemical treatment of acidic mine wastewater, comprising: a microorganism oxidation de-ironing reactor, a microorganism sulfate reduction reactor and a culture medium adding unit; wherein, the inside of the microbial oxidation de-ironing reactor is filled with ceramsite filler, and the bottom of the microbial oxidation de-ironing reactor is provided with an aeration device; the microbial sulfate reduction reactor is communicated with the microbial oxidation iron removal reactor through a first connecting pipeline, and a lift pump is arranged on the first connecting pipeline; ceramsite filler is filled in the microbial sulfate reduction reactor, a circulating pipeline is arranged between a water inlet at the bottom of the microbial sulfate reduction reactor and a first water outlet at the top of the microbial sulfate reduction reactor, and an internal circulating pump is arranged on the circulating pipeline; the culture medium adding unit is a stirring water tank and is connected with the microbial sulfate reduction reactor through a second connecting pipeline, and a mechanical diaphragm metering pump is arranged on the second connecting pipeline.
Preferably, the aeration intensity of the aeration device is 3-6 m3/m2·h。
Preferably, the particle size of the ceramsite particles filled in the microbial oxidation deferrization reactor is 2-8 mm, and the filling depth of the ceramsite particles is 1/4-1/2 of the depth of the microbial oxidation deferrization reactor.
Preferably, the total iron volume load of the microbial oxidation deferrization reactor is 0.9-1.8 kg/m3D, the operating temperature is 25-30 ℃.
The total iron volume load calculation mode is obtained by multiplying the total iron content in inlet water by daily treated water quantity and dividing the daily treated water quantity by the volume of the reactor, belongs to important parameters of process design, and can calculate the volume of the reactor according to the total iron ion concentration in the inlet water and the design treatment capacity.
Preferably, the volume load of the microbial sulfate reduction reactor for heavy metal ion treatment is 0.36-0.72 kg/m3D, the operating temperature is 25-30 ℃.
Preferably, the particle size of the ceramsite particles filled in the microbial sulfate reduction reactor is 2-8 mm, and the filling depth of the ceramsite particles is 1/4-1/2 of the depth of the microbial oxidation deferrization reactor.
The invention also provides a method for treating wastewater by using the biochemical treatment system for mine acid wastewater, which comprises the following steps:
1) injecting the mine acidic wastewater into the microbial oxidation iron removal reactor from the upper part, starting an aeration device, and observing that the oxidation-reduction potential in the reactor is higher than 700mV, starting to continuously introduce the mine acidic wastewater, wherein the water amount of the mine acidic wastewater which is started to be introduced is 25% of the design value and is gradually increased to 50%, 75% and 100%; the mine acidic wastewater flows through the microbial oxidation iron removal reactor from top to bottom, and the effluent of the microbial oxidation iron removal reactor is first process wastewater;
2) adding the surplus sludge of the municipal sewage treatment plant into a microbial sulfate reduction reactor, wherein the adding amount is 10% of the volume of the microbial sulfate reduction reactor, then filling the reactor with clear water, adding a culture medium into the microbial sulfate reduction reactor from a culture medium adding unit at the moment, controlling the adding amount of the culture medium through a mechanical diaphragm metering pump, enabling the weight ratio of the added culture medium to the added clear water to be 0.038-0.045%, starting an internal circulating pump, starting to introduce the first process wastewater when the oxidation-reduction potential in the microbial sulfate reduction reactor is lower than-300 mV, and gradually increasing the introduced first process wastewater to 50%, 75% and 100% of the design value of 25%; the wastewater in the first process flows through the microbial sulfate reduction reactor from bottom to top, and the liquid at the upper part of the microbial sulfate reactor is re-fed into the lower part of the microbial sulfate reactor through a circulating pipeline, wherein the internal circulation ratio is 100-300%.
The internal circulation ratio is the ratio of the flow of the liquid delivered back by the internal circulation pump to the flow of the wastewater in the first process, and the parameter is mainly used for the model selection of the internal circulation pump, namely the flow of the internal circulation pump can be obtained by multiplying the treated water quantity by the internal circulation ratio.
Although the content of the vibrio desulfurizating bacteria in the residual sludge of municipal sewage treatment plants in various places slightly changes, when the addition amount of the residual sludge reaches 10 percent of the volume of the reactor, the startup of the reactor in the section can be ensured.
Wherein, the iron-oxidizing bacteria enriched and cultured in the mine acid wastewater in the microbial oxidation deferrization reactor are Thiobacillus ferrooxidans.
Wherein, the sulfate reducing bacteria which are enriched and cultured in the microorganism sulfate reducing reactor from the excess sludge of the municipal sewage treatment plant are vibrio desulfurates.
In the invention, thiobacillus ferrooxidans is enriched in the microbial oxidation deferrization reactor, and vibrio desulfurates is enriched in the microbial sulfate reduction reactor. The method comprises the following steps of (1) intercepting the thiobacillus ferrooxidans in the acidic mine wastewater to the surface of ceramsite particles to form a biological film, continuously enriching, and realizing inoculation of the thiobacillus ferrooxidans in a microbial oxidation deferrization reactor, wherein the thiobacillus ferrooxidans is a common strain in the acidic mine wastewater, belongs to autotrophic bacteria, does not need to be added with a carbon source for growth, only needs to provide ferrous ions as electron donors, and intercepts the thiobacillus ferrooxidans in the acidic mine wastewater to the surface of the ceramsite particles by oxidizing the ceramsite particles filled in the deferrization reactor through the microbes; the vibrio desulfurates are common strains in the excess sludge of the municipal sewage treatment plant, belong to heterotrophic bacteria, a culture medium is required to be provided to supplement a carbon source in the enrichment process, and the vibrio desulfurates are cut on the surface of ceramsite particles by the ceramsite particles filled in the microbial sulfate reduction reactor to form a biological film, so that the enrichment is continuous, and the inoculation of the vibrio desulfurates in the excess sludge of the municipal sewage treatment plant is also realized.
In the biochemical treatment system for the mine acidic wastewater, provided by the invention, thiobacillus ferrooxidans in the mine acidic wastewater can be intercepted and enriched by the ceramsite filler to form a biological film, and under the aeration condition of the aeration device, the thiobacillus ferrooxidans intercepted and enriched on the ceramsite filler can enable Fe in the mine acidic wastewater to be intercepted and enriched2+Is oxidized into Fe3+And forming jarosite and schwerer minerals, so that iron ions are precipitated and separated from the acid mine wastewater and deposited on the surface of the particle filler.
The microbial oxidation iron removal reactor utilizes the acid and alkali consuming action of the thiobacillus ferrooxidans in the logarithmic growth phase to increase the pH value of the acid mine wastewater by 0.1-0.3.
The microorganism sulfate reduction reactor is inoculated with the excess sludge of the municipal sewage treatment plant, sulfate reducing bacteria are enriched and cultured, sulfate radicals in the wastewater in the first process are reduced into hydrogen sulfide through the sulfate reducing bacteria, and the effect of reducing the excess heavy metal ions such as Cu in the wastewater in the first process is realized2+、Zn2+And (4) sulfurizing and precipitating.
The microbial sulfate reduction reactor can raise the pH of the wastewater in the first process to be more than 6 by utilizing the action of sulfate reducing bacteria on acid consumption and alkali production in reducing sulfate radicals into negative divalent sulfur ions.
The biochemical treatment system for the mine acidic wastewater provided by the invention provides a new technical principle that: the acidic mine wastewater is characterized in that the pH is acidic, the water contains iron ions and valuable heavy metal ions such as copper, zinc and the like, the prior art can not increase the pH by adding alkaline agents such as lime, sodium hydroxide and the like, so that the heavy metal ions form hydroxide precipitates, and the prior art has the disadvantages of large dosage of the alkaline agents, large slag production amount and high cost. This patent application technology no longer uses any chemical alkaline medicament, but through two microbial processes, microorganism oxidation deironing and microorganism sulfate reduction can reach and get rid of heavy metal ion such as aquatic iron and copper, zinc, wherein, the principle of microorganism iron oxidation deironing reactor is mainly, iron ion is mainly for bivalent iron in the mine acid waste water, be difficult for the deposit, after becoming ferric by the oxidation of ferrous oxide thiobacillus, just can realize the deposit of iron and get rid of, in microorganism sulfate reactor, mainly utilize sulfate reducing bacteria to reduce the sulfate radical in the aquatic into hydrogen sulfide, can make remaining heavy metal ion like copper and zinc etc. like this, form the sulphide sediment, realize the desorption. In the process, no chemical agent is used, and the treatment process is more environment-friendly.
The invention has the beneficial effects that:
the invention provides a biochemical treatment system and a biochemical treatment method for mine acid wastewater, wherein in the treatment process of the mine acid wastewater, alkaline chemical agents such as lime and the like are not used, the pH value of the mine acid wastewater is lifted and heavy metals are removed by means of oxidation and reduction reactions of microorganisms in the whole process, the generation amount of precipitated slag is correspondingly and greatly reduced, the treatment cost is obviously reduced, the treatment process is more green, and meanwhile, because a large amount of alkaline chemical agents are not added, the labor amount in the operation process is obviously reduced, and the operation is more convenient.
Drawings
FIG. 1 is a schematic diagram of a biochemical treatment system for mine acidic wastewater provided by the invention.
FIG. 2 is a flow chart of the biochemical treatment system for mine acidic wastewater provided by the invention.
Reference numerals
1: a microorganism oxidation de-ironing reactor; 2: a microbial sulfate reduction reactor; 3: a culture medium adding unit; 4: an aeration device; 5: a lift pump; 6: an internal circulation pump; 7: a mechanical diaphragm metering pump; 8: ceramsite filler; 9: and (4) ceramsite filler.
Detailed Description
The present invention will be described in further detail with reference to examples.
Example 1:
as shown in figure 1, the biochemical treatment system for mine acidic wastewater comprises a microbial oxidation deferrization reactor 1, a microbial sulfate reduction reactor 2 and a culture medium adding unit 3.
Wherein, the inside of the microbial oxidation de-ironing reactor 1 is filled with ceramsite filler 8 and is provided with an aeration device 4, the microbial oxidation de-ironing reactor 1 is a steel-concrete tank wall, the height is 4.5 to 5.5 meters, the ceramsite filler is 1.5 to 2 meters, the height of the microbial oxidation de-ironing reactor 1 is 5 meters, the filling depth of the ceramsite filler is 1.5 meters, the particle size of the ceramsite filler is 5mm, and the aeration intensity of the aeration device is 4m3/m2H, operating temperature 28 ℃ and total iron volume load 1.8kg/m3·d。
The microbial sulfate reduction reactor 2 is connected with the microbial oxidation deferrization reactor 1 through a first connecting pipeline 11, and a lift pump 5 is arranged on the first connecting pipeline 11; the microbial sulfate reduction reactor 2 is internally filled with ceramsite fillers 9, the microbial sulfate reduction reactor 2 is a steel-concrete tank wall, the height is 4.5-5.5 m, and the filling depth of the ceramsite fillers is 1.5-2 m, in the embodiment, the height of the microbial sulfate reduction reactor 2 is 5m, and the filling depth of the ceramsite fillers is 2 m. A circulating pipeline 21 is arranged between a bottom water inlet 22 and a top first water outlet 23 of the microbial sulfate reduction reactor 2, an internal circulating pump 6 is arranged on the circulating pipeline, the internal circulating ratio is 150%, and a second water outlet 24 is also arranged at the top of the microbial sulfate reduction reactor 3 and used for discharging the treated water; the heavy metal treatment volume load is 0.72kg/m3·d。
The culture medium adding unit 3 is a stirring water tank, the culture medium adding unit 3 is connected to the microbial sulfate reduction reactor 2 through a second connecting pipeline 31, and a mechanical diaphragm metering pump 7 is arranged on the second connecting pipeline 31.
The weight ratio of the added amount of the culture medium to the treated wastewater is 0.038%, and the weight ratio of the components of the culture medium is as follows: 95 parts of glycerol, 4 parts of ammonium sulfate and 1 part of potassium dihydrogen phosphate.
As shown in fig. 2, in the operation process, the microbial oxidation iron removal reactor is started, the mine acidic wastewater is added into the microbial oxidation iron removal reactor, the aeration device is started, compressed air is introduced, the oxidation-reduction potential is raised to 620mV after 7 days of culture, at this time, the dominant bacterial strain in the reactor is thiobacillus ferrooxidans, the ore acidic wastewater is continuously introduced, the water amount is 25% of the designed value, the first process wastewater is formed, and the inlet water amount is gradually raised to 50%, 75% and 100% every 7 days.
Starting a microbial sulfate reduction reactor, taking excess sludge of an urban municipal sewage treatment plant as inoculated sludge, adding the added amount of the excess sludge into the microbial sulfate reduction reactor according to the volume proportion of 10%, then filling the reactor with clear water, adding a culture medium, wherein the weight ratio of the added amount of the culture medium to all liquid in the reactor is 0.045%, starting an internal circulating pump, reducing the oxidation-reduction potential in the reactor to-310 mV after 7 days of operation, starting to continuously introduce first process wastewater, wherein the introduced first process wastewater is 25% of the design value, the weight ratio of the added culture medium to the treated wastewater is 0.045%, and gradually increasing the inflow water amount to 50%, 75% and 100% every 7 days.
When the water inflow reaches 100%, the water in and out of the system is taken to detect the copper, zinc, iron and pH in the water, and the water quality indexes are shown in table 1.
TABLE 1 (unit mg/L)
| Cu | Zn | Fe | pH | |
| Raw water | 334.2 | 10.2 | 1756 | 2.5 |
| First process waste water | 320.1 | 9.4 | 87.1 | 2.7 |
| <0.1 | <0.1 | <0.1 | 6.4 |
Example 2:
as shown in figure 1, the biochemical treatment system for mine acidic wastewater comprises a microbial oxidation deferrization reactor 1, a microbial sulfate reduction reactor 2 and a culture medium adding unit 3.
Wherein, the inside of the reactor 1 for removing iron by microbial oxidation is filled with ceramsite filler 8 and is provided with an aeration device 4, and the microorganism is oxygenatedThe iron removing reactor 1 is a steel-concrete tank wall with the height of 4.5-5.5 m and the ceramsite filler with the length of 1.5-2 m, the microorganism oxidation iron removing reactor 1 of the embodiment has the height of 5m and the ceramsite filler filling depth of 2 m, the particle size of the ceramsite filler is 8mm, and the aeration intensity of the aeration device is 5m3/m2H, operating temperature 26 ℃ and total iron volume load 1.8kg/m3·d。
The microbial sulfate reduction reactor 2 is connected with the microbial oxidation deferrization reactor 1 through a first connecting pipeline 11, and a lift pump 5 is arranged on the first connecting pipeline 11; the inside of the microbial sulfate reduction reactor 2 is filled with ceramsite filler 9, the microbial sulfate reduction reactor 2 is a steel-concrete tank wall, the height is 4.5-5.5 m, and the filling depth of the ceramsite filler is 1.5-2 m, in the embodiment, the height of the microbial sulfate reduction reactor 2 is 5m, the filling depth of the ceramsite filler is 2.5 m, and the particle size of the ceramsite filler is 8 mm. A circulating pipeline 21 is arranged between a bottom water inlet 22 and a top first water outlet 23 of the microbial sulfate reduction reactor 2, an internal circulating pump 6 with an internal circulation ratio of 300% is arranged on the circulating pipeline, and a second water outlet 24 is also arranged at the top of the microbial sulfate reduction reactor 3 and used for discharging the treated water; the heavy metal treatment volume load is 0.4kg/m3·d。
The culture medium adding unit 3 is a stirring water tank, the culture medium adding unit 3 is connected to the microbial sulfate reduction reactor 2 through a second connecting pipeline 31, and a mechanical diaphragm metering pump 7 is arranged on the second connecting pipeline 31.
The weight ratio of the added amount of the culture medium to the treated wastewater is 0.04 percent, and the weight ratio of the components of the culture medium is as follows: 95 parts of glycerol, 4 parts of ammonium sulfate and 1 part of potassium dihydrogen phosphate.
As shown in fig. 2, in the operation process, the microbial oxidation iron removal reactor is started, the mine acidic wastewater is added into the microbial oxidation iron removal reactor, the aeration device is started, compressed air is introduced, the oxidation-reduction potential is increased to 660mV after 7 days of culture, the mine acidic wastewater starts to be continuously introduced, the water amount is 25% of the design value, the first process wastewater is formed, and the inlet water amount is gradually increased to 50%, 75% and 100% every 7 days.
Starting a microbial oxidation iron removal reactor, taking excess sludge of an urban municipal sewage treatment plant as inoculated sludge, adding the added amount of the excess sludge and the volume ratio of the reactor according to 10%, filling the reactor with clear water, adding a culture medium, wherein the weight ratio of the added amount of the culture medium to all liquid in the reactor is 0.04%, starting an internal circulating pump, reducing the oxidation-reduction potential in the reactor to-310 mV after 7 days of operation, starting to continuously introduce the wastewater in the first process, the wastewater in the first process is 25% of the design value, the weight ratio of the added culture medium to the treated wastewater is 0.04%, and gradually increasing the inflow water to 50%, 75% and 100% every 7 days.
When the water inflow reaches 100%, the water in and out of the system is taken to detect the copper, zinc, iron and pH in the water, and the water quality indexes are shown in Table 2.
TABLE 2 (unit mg/L)
| Cu | Zn | Fe | pH | |
| Raw water | 110.2 | 2.1 | 766 | 2.8 |
| First process waste water | 108.4 | 1.7 | 45.5 | 3.1 |
| Removal rate | <0.1 | <0.1 | <0.1 | 6.7 |
It can be seen from the above embodiments that the present invention provides a system and a method for rapidly starting microbial sulfate reduction, which do not use alkaline chemicals such as lime, etc., and accordingly greatly reduce the generation of precipitated slag, significantly reduce the operating cost, and make the treatment process more green; the labor amount is obviously reduced in the running process, and the operation is more convenient.
Claims (10)
1. The biochemical treatment system for the mine acidic wastewater is characterized by comprising the following components: a microorganism oxidation de-ironing reactor, a microorganism sulfate reduction reactor and a culture medium adding unit;
wherein, the inside of the microbial oxidation de-ironing reactor is filled with ceramsite filler, and the bottom of the microbial oxidation de-ironing reactor is provided with an aeration device;
the microbial sulfate reduction reactor is connected with the microbial oxidation iron removal reactor through a first connecting pipeline, and a lift pump is arranged on the first connecting pipeline; the inside of the microbial sulfate reduction reactor is filled with ceramsite filler, a circulating pipeline is arranged between a water inlet at the bottom and a first water outlet at the top of the microbial sulfate reduction reactor, an internal circulating pump is arranged on the circulating pipeline, and a second water outlet is also arranged at the top of the microbial sulfate reduction reactor and used for discharging treated water;
the culture medium adding unit is a stirring water tank and is connected with the microbial sulfate reduction reactor through a second connecting pipeline, and a mechanical diaphragm metering pump is arranged on the second connecting pipeline.
2. The biochemical treatment system for mine acidic wastewater according to claim 1, wherein the aeration intensity of the aeration device is 3-6 m3/m2·h。
3. The biochemical treatment system for mine acidic wastewater according to claim 1, wherein the particle size of the ceramsite particles filled in the microbial oxidation deferrization reactor is 2-8 mm, and the filling depth of the ceramsite particles is 1/4-1/2 of the depth of the microbial oxidation deferrization reactor.
4. The biochemical treatment system for mine acidic wastewater according to claim 1, wherein the total iron volume load of the microbial oxidation deferrization reactor is 0.9-1.8 kg/m3D, the operating temperature is 25-30 ℃.
5. The biochemical treatment system for mine acidic wastewater according to claim 1, wherein the volume load of the microbial sulfate reduction reactor on heavy metal ion treatment is 0.36-0.72 kg/m3D, the operating temperature is 25-30 ℃.
6. The biochemical treatment system for mine acidic wastewater according to claim 1, wherein the particle size of ceramsite particles filled in the microbial sulfate reduction reactor is 2-8 mm, and the filling depth of the ceramsite particles is 1/4-1/2 which is the depth of the microbial oxidation deferrization reactor.
7. The biochemical treatment system for mine acidic wastewater according to claim 1, wherein the culture medium comprises: 95 parts of glycerol, 4 parts of ammonium sulfate and 1 part of monopotassium phosphate, wherein the weight ratio of the addition amount of the culture medium to the wastewater treatment is 0.038-0.045%.
8. A method for wastewater treatment by using the biochemical treatment system for mine acidic wastewater according to any one of claims 1 to 7, comprising the steps of:
1) injecting mine acid wastewater into the microbial oxidation iron removal reactor from the upper part, starting an aeration device, and observing that the oxidation-reduction potential in the reactor is higher than 700mV, starting to continuously introduce the mine acid wastewater, wherein the water amount of the mine acid wastewater which is started to be introduced is 25% of the design value, gradually increases to 50%, 75% and 100%, and continuously operates after reaching 100%; the mine acidic wastewater flows through the microbial oxidation iron removal reactor from top to bottom, and the effluent of the microbial oxidation iron removal reactor is first process wastewater;
2) adding the surplus sludge of the municipal sewage treatment plant into a microbial sulfate reduction reactor, wherein the adding amount is 10% of the volume of the microbial sulfate reduction reactor, then filling the reactor with clear water, adding a culture medium into the microbial sulfate reduction reactor from a culture medium adding unit at the moment, controlling the adding amount of the culture medium through a mechanical diaphragm metering pump, enabling the weight ratio of the added culture medium to the added clear water to be 0.038-0.045%, starting an internal circulating pump, starting to introduce the first process wastewater when the oxidation-reduction potential in the microbial sulfate reduction reactor is lower than-300 mV, gradually increasing the introduced first process wastewater to 50%, 75% and 100%, and continuously operating after the introduced first process wastewater reaches 100%; in the first process, the wastewater flows through the microbial sulfate reduction reactor from bottom to top, and the liquid at the upper part of the microbial sulfate reactor is re-fed into the lower part of the microbial sulfate reactor through a circulating pipeline, wherein the internal circulation ratio is 100-300%;
step 1) and step 2) operate before water reaches 100%.
9. The method as claimed in claim 8, wherein the iron oxidizing bacteria enriched and cultured in the microbial iron-removing oxidation reactor in the step 1) from the acid mine wastewater are Thiobacillus ferrooxidans.
10. The method of claim 8, wherein the sulfate-reducing bacteria are desulfurization vibrio bacteria enriched from the excess sludge of municipal sewage treatment plants in the microbial sulfate-reducing reactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811601184.1A CN111362419A (en) | 2018-12-26 | 2018-12-26 | Biochemical treatment system for mine acidic wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811601184.1A CN111362419A (en) | 2018-12-26 | 2018-12-26 | Biochemical treatment system for mine acidic wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111362419A true CN111362419A (en) | 2020-07-03 |
Family
ID=71202298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811601184.1A Pending CN111362419A (en) | 2018-12-26 | 2018-12-26 | Biochemical treatment system for mine acidic wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111362419A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112159050A (en) * | 2020-10-29 | 2021-01-01 | 云南天朗环境科技有限公司 | Acid-washing mine wastewater treatment system and method |
| CN112194327A (en) * | 2020-10-19 | 2021-01-08 | 张家港市五湖新材料技术开发有限公司 | Mine acidic wastewater treatment process |
| CN112458014A (en) * | 2020-11-26 | 2021-03-09 | 广西科技大学 | Method for preparing acid-resistant and low-temperature-resistant sulfuric acid reduction complex microbial inoculum by using cassava residues as carbon source and application of microbial inoculum |
| CN116425318A (en) * | 2023-03-24 | 2023-07-14 | 生态环境部南京环境科学研究所 | Treatment device for treating mine acidic wastewater by using activated carbon loaded microorganisms |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1458083A (en) * | 2003-05-16 | 2003-11-26 | 天津大学 | Method for increasing waste water treating efficiency by improving activity of sulfate reducing bacteria |
| CN101402491A (en) * | 2008-10-27 | 2009-04-08 | 合肥工业大学 | Method for treating heavy metal-containing acidic waste water and recycling heavy metal with biomass fixed bed |
| KR100916842B1 (en) * | 2009-03-02 | 2009-09-14 | 한국광해관리공단 | Improved alkali supplying tub for purifing acid mine drainage and constructring method thereof |
| CN101628773A (en) * | 2009-08-04 | 2010-01-20 | 紫金矿业集团股份有限公司 | Treatment process of copper-iron-contained high-concentration acidic mine wastewater |
| CN105036317A (en) * | 2015-07-17 | 2015-11-11 | 北京矿冶研究总院 | Method for simultaneously removing organic matters, heavy metals and sulfate in beneficiation wastewater |
| CN105601051A (en) * | 2016-03-11 | 2016-05-25 | 山西农业大学 | Biomineralization-based acidic mine wastewater treatment system and treatment method |
| CN106867921A (en) * | 2015-12-11 | 2017-06-20 | 北京有色金属研究总院 | The method that thiobacillus ferrooxidans and bacterium treatment acid wastewater in mine reclaim iron resource |
| CN106868302A (en) * | 2015-12-11 | 2017-06-20 | 北京有色金属研究总院 | Sulfate reducing bacteria and its technique for reclaiming valuable metal in mine wastewater |
-
2018
- 2018-12-26 CN CN201811601184.1A patent/CN111362419A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1458083A (en) * | 2003-05-16 | 2003-11-26 | 天津大学 | Method for increasing waste water treating efficiency by improving activity of sulfate reducing bacteria |
| CN101402491A (en) * | 2008-10-27 | 2009-04-08 | 合肥工业大学 | Method for treating heavy metal-containing acidic waste water and recycling heavy metal with biomass fixed bed |
| KR100916842B1 (en) * | 2009-03-02 | 2009-09-14 | 한국광해관리공단 | Improved alkali supplying tub for purifing acid mine drainage and constructring method thereof |
| CN101628773A (en) * | 2009-08-04 | 2010-01-20 | 紫金矿业集团股份有限公司 | Treatment process of copper-iron-contained high-concentration acidic mine wastewater |
| CN105036317A (en) * | 2015-07-17 | 2015-11-11 | 北京矿冶研究总院 | Method for simultaneously removing organic matters, heavy metals and sulfate in beneficiation wastewater |
| CN106867921A (en) * | 2015-12-11 | 2017-06-20 | 北京有色金属研究总院 | The method that thiobacillus ferrooxidans and bacterium treatment acid wastewater in mine reclaim iron resource |
| CN106868302A (en) * | 2015-12-11 | 2017-06-20 | 北京有色金属研究总院 | Sulfate reducing bacteria and its technique for reclaiming valuable metal in mine wastewater |
| CN105601051A (en) * | 2016-03-11 | 2016-05-25 | 山西农业大学 | Biomineralization-based acidic mine wastewater treatment system and treatment method |
Non-Patent Citations (1)
| Title |
|---|
| 舒展等: "《环境生态学》", 31 July 2017, 哈尔滨：东北林业大学出版社 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112194327A (en) * | 2020-10-19 | 2021-01-08 | 张家港市五湖新材料技术开发有限公司 | Mine acidic wastewater treatment process |
| CN112159050A (en) * | 2020-10-29 | 2021-01-01 | 云南天朗环境科技有限公司 | Acid-washing mine wastewater treatment system and method |
| CN112458014A (en) * | 2020-11-26 | 2021-03-09 | 广西科技大学 | Method for preparing acid-resistant and low-temperature-resistant sulfuric acid reduction complex microbial inoculum by using cassava residues as carbon source and application of microbial inoculum |
| CN116425318A (en) * | 2023-03-24 | 2023-07-14 | 生态环境部南京环境科学研究所 | Treatment device for treating mine acidic wastewater by using activated carbon loaded microorganisms |
| CN116425318B (en) * | 2023-03-24 | 2023-09-22 | 生态环境部南京环境科学研究所 | Treatment device for treating mine acidic wastewater by using activated carbon loaded microorganisms |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111362419A (en) | Biochemical treatment system for mine acidic wastewater | |
| WO2021120364A1 (en) | Method and system for biologically treating acidic mine wastewater while recovering iron ion | |
| CN108503026B (en) | Urban secondary effluent sulfur matrix circulating autotrophic nitrogen removal method | |
| CN101402491A (en) | Method for treating heavy metal-containing acidic waste water and recycling heavy metal with biomass fixed bed | |
| CN102295385A (en) | Garbage percolate processing technology | |
| CN105461151A (en) | Landfill leachate treatment technology | |
| CN105601051B (en) | A kind of acidic mine waste water processing system and processing method based on biology into ore deposit | |
| CN104071945A (en) | Treatment device and treatment method for acid wastewater polluted by mine heavy metals | |
| CN101234826A (en) | Sulfuration recovery processing method and device for high-acidity high-arsenic high-cadmium waste water | |
| CN103641230B (en) | Method for carrying out organic wastewater pretreatment by using an iron-carbon-Fenton-integrated reactor | |
| CN106396246A (en) | A comprehensive sewage treatment plant | |
| CN101805099A (en) | Treatment methods of landfill leachate and treatment systems thereof | |
| CN105236701A (en) | Method for dehydrating sludge by utilizing bioleaching sludge co-conditioning | |
| CN111675434A (en) | Treatment method of arsenic-containing wastewater in copper smelting | |
| CN104370411A (en) | Method for removing heavy metals from industrial wastewater | |
| CN107399829A (en) | A kind of method and system device that nitrate in water removal is removed based on S-Fe collaboration autotrophic denitrifications | |
| CN111362425B (en) | Method for treating acid mine wastewater by using micro-electrolysis-enhanced sulfate reducing bacteria and micro-electrolysis bioreactor | |
| CN110078209B (en) | Method for forming cadmium sulfur ore by reducing sulfate with microorganism | |
| CN104944575B (en) | Biological treatment method of acidic sulfate wastewater containing Fe3+ and Cu2+ | |
| CN210237408U (en) | Poisonous waste water treatment equipment of resin production | |
| CN101973659A (en) | Device and method for refining waste water by treating vitamin B12 by means of co-use of micro-electrolysis and physicochemical method | |
| CN116715345A (en) | Autotrophic denitrification bioreactor based on pyrite coupling filler and application | |
| CN114212881B (en) | Process and device for strengthening synchronous phosphorus recovery of short-cut denitrification anaerobic ammonia oxidation denitrification | |
| CN212404218U (en) | Microorganism mineral leaching device | |
| CN212198906U (en) | System for biological treatment acid mine waste water retrieves iron ion simultaneously |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20210402 Address after: 101407 No.11, Xingke East Street, Yanqi Economic and Technological Development Zone, Huairou District, Beijing Applicant after: Youyan resources and Environment Technology Research Institute (Beijing) Co.,Ltd. Address before: 101407 No. 11 Xingke East Street, Yanqi Economic Development Zone, Huairou District, Beijing Applicant before: YOUYAN ENGINEERING TECHNOLOGY RESEARCH INSTITUTE Co.,Ltd. |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200703 |