CN115259560A - System and method for biological softening of desulfurization wastewater and recovery of elemental sulfur - Google Patents
System and method for biological softening of desulfurization wastewater and recovery of elemental sulfur Download PDFInfo
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- 239000002351 wastewater Substances 0.000 title claims abstract description 54
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 46
- 230000023556 desulfurization Effects 0.000 title claims abstract description 46
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000011084 recovery Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000010802 sludge Substances 0.000 claims abstract description 36
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 32
- 238000006243 chemical reaction Methods 0.000 claims abstract description 30
- 238000000855 fermentation Methods 0.000 claims abstract description 24
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 16
- 238000009826 distribution Methods 0.000 claims abstract description 10
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- 238000005273 aeration Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 9
- 230000004151 fermentation Effects 0.000 claims description 7
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 230000033116 oxidation-reduction process Effects 0.000 claims description 6
- 241000894006 Bacteria Species 0.000 claims description 5
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- 238000010790 dilution Methods 0.000 claims description 4
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- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 3
- YQCIWBXEVYWRCW-UHFFFAOYSA-N methane;sulfane Chemical compound C.S YQCIWBXEVYWRCW-UHFFFAOYSA-N 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000003786 synthesis reaction Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
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- 229910052717 sulfur Inorganic materials 0.000 claims 1
- 239000011593 sulfur Substances 0.000 claims 1
- 239000002699 waste material Substances 0.000 description 8
- 208000028659 discharge Diseases 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 230000002195 synergetic effect Effects 0.000 description 4
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- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
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- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
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- 239000003344 environmental pollutant Substances 0.000 description 1
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- -1 fluorine ions Chemical class 0.000 description 1
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- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 125000001741 organic sulfur group Chemical group 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
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- 150000003839 salts Chemical class 0.000 description 1
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 description 1
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- 230000001988 toxicity Effects 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/74—Treatment of water, waste water, or sewage by oxidation with air
-
- 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
- C02F3/2866—Particular arrangements for anaerobic reactors
-
- 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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
-
- 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
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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
- 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
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- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
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- Biodiversity & Conservation Biology (AREA)
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Abstract
The invention discloses a system and a method for biologically softening desulfurization wastewater and recovering elemental sulfur, wherein a water outlet of a preposed reaction clarifier and a water outlet of a sludge anaerobic fermentation device are converged and communicated with a water inlet on the side surface of the bottom of an anaerobic bioreactor, a water distribution system and a three-phase separator are sequentially arranged in the anaerobic bioreactor from bottom to top, wherein the water distribution system is communicated with the water inlet, a water outlet of the three-phase separator is communicated with an inlet of a sulfide micro-oxidation device, and a water outlet of the sulfide micro-oxidation device is communicated with an advanced treatment system. The system and the method can realize the softening of desulfurization waste water, the removal of heavy metals and the recovery of elemental sulfur.
Description
Technical Field
The invention belongs to the field of wastewater treatment, and relates to a system and a method for biologically softening desulfurization wastewater and recovering elemental sulfur.
Background
Limestone-gypsum wet flue gas desulfurization technology is SO which is most widely applied in most of coal-fired power plants at present2The removal technology has the advantages of high desulfurization efficiency, stable and reliable system operation and the like, but simultaneously generates a large amount of desulfurization wastewater which has high content of suspended matters, high salt content and a plurality of scale-causing ions (Ca)2+、Mg2+、SO4 2-And the like), and also contains a large amount of heavy metals including mercury (Hg), lead (Pb), cadmium (Cd), chromium (Cr), nickel (Ni), zinc (Zn), arsenic (As) and the like, and must be strictly treated and then discharged, otherwise, the surrounding environment of the power plant is seriously influenced.
Sulfate (SO) contained in desulfurization waste water4 2-) And heavy metals are two major factors contributing to environmental pollution. Containing SO4 2-The discharged desulfurization wastewater can acidify the receiving water body and harm aquatic organisms; soil discharged into farmland soil destroys soil properties and structure, resulting in a decrease in crop yield and quality. Many heavy metals contained in the desulfurization waste water have high toxicity, bioaccumulation performance and nondegradable performance, and once entering the environment, the heavy metals are accumulated in the environment continuously and are difficult to removeIt will seriously harm the ecological environment and the life health.
At present, the desulfurization wastewater is treated by adopting a 'neutralization + precipitation + flocculation' triple box process to reduce the concentration of pollutants such as suspended matters, fluorine ions, heavy metals and the like in the desulfurization wastewater, but the process has the defects of more configured equipment, large investment, high operation cost, large equipment overhaul and maintenance amount and the like, so that the process has inconvenience and difficulty in the actual operation process. Meanwhile, as lime milk, organic sulfur, coagulant aid and other chemical agents need to be added in the triple-box process, a dosing system is too complex, and the long-term stable operation of the system is further influenced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a system and a method for biologically softening desulfurization wastewater and recovering elemental sulfur, the system has the advantages of high treatment efficiency, low treatment cost and difficult secondary pollution, heavy metal ions and sulfate ions in the desulfurization wastewater can be removed simultaneously, the resource recovery of the elemental sulfur is realized by a micro-oxidation method, the synergistic treatment of the desulfurization wastewater and sludge is realized, and the purpose of treating waste by waste is achieved.
In order to achieve the purpose, the system and the method for biologically softening the desulfurization wastewater and recovering the elemental sulfur comprise a preposed reaction clarifier, a sludge anaerobic fermentation device, an anaerobic bioreactor, a sulfide micro-oxidation device, an elemental sulfur recovery device and a deep treatment system.
The water outlet of the preposed reaction clarifier and the water outlet of the sludge anaerobic fermentation device are converged and communicated with the water inlet on the side face of the bottom of the anaerobic bioreactor, a water distribution system and a three-phase separator are sequentially arranged in the anaerobic bioreactor from bottom to top, wherein the water distribution system is communicated with the water inlet, the water outlet of the three-phase separator is communicated with the inlet of the sulfide micro-oxidation device, and the water outlet of the sulfide micro-oxidation device is communicated with the deep treatment system.
The water outlet of the preposed reaction clarifier and the water outlet of the sludge anaerobic fermentation device are converged and communicated with the water inlet on the side surface of the bottom of the anaerobic bioreactor.
The water outlet of the three-phase separator is communicated with the inlet of the sulfide micro-oxidation device.
The water outlet of the sulfide micro-oxidation device is communicated with the advanced treatment system.
The device also comprises a water outlet of the three-phase separator which is communicated with the upper part of the preposed reaction clarifier, an exhaust port at the upper part of the sulfide micro-oxidation device is communicated with the lower part of the liquid surface of the preposed reaction clarifier, the side surface of the sulfide micro-oxidation device is communicated with the elemental sulfur recovery device, and a sludge discharge pipe at the side surface of the anaerobic bioreactor is communicated with the upper part of the sludge anaerobic fermentation device.
The invention discloses a system and a method for biologically softening desulfurization wastewater and recovering elemental sulfur, which comprises the following steps:
1) The desulfurization wastewater and the reflux liquid of the anaerobic bioreactor enter a preposed reaction clarifier for buffer dilution, precipitation reaction and sludge discharge, and the dissolved S in the reflux liquid2-And H produced by the sulphide oxidation unit2S gas enters S generated in wastewater2-The heavy metal in the desulfurization wastewater reacts to generate sulfide precipitate with small solubility product, so that the heavy metal is efficiently removed;
2) Mixing the treated wastewater with sludge fermentation liquor generated by a sludge anaerobic fermentation device, allowing the mixture to enter an anaerobic bioreactor, and reducing sulfate in the desulfurization wastewater into sulfide by using Sulfate Reducing Bacteria (SRB) by using organic matters in the sludge fermentation liquor as a carbon source and an electron donor synthesized by cells under an anaerobic condition to remove sulfate ions;
3) The treated wastewater enters a sulfide micro-oxidation device, sulfides are oxidized into elemental sulfur under the micro-aeration condition, and the generated elemental sulfur foam is effectively scraped out in time through a mechanical scraper device and enters an elemental sulfur recovery device; the effluent enters an advanced treatment system.
The pH value of the front reaction clarifier is controlled to be about 8.
The reaction temperature of the anaerobic bioreactor is 30-40 ℃, the pH value is controlled to be 7-8, and the carbon-sulfur ratio rho (COD)/rho (SO) is controlled4 2-) Is 2 to 3.
VulcanizationControlling oxidation-reduction potential to be S in matter micro-oxidation device1mV＜ORP＜S2mV。
The invention has the following beneficial effects:
the system and the method for biologically softening the desulfurization wastewater and recovering the elemental sulfur have the advantages that during the specific operation, the effluent is discharged to the preposed reaction clarifier through the reflux anaerobic reactor, and S in the reflux liquid2-The heavy metal ions in the desulfurization wastewater react to form sulfide precipitate, so that the heavy metal ions are removed; SO is prepared by using organic matters in anaerobic sludge fermentation liquor as a carbon source and an electron donor for cell synthesis through sulfate reducing bacteria4 2-The method has the advantages of high treatment efficiency, low treatment cost, no need of adding chemicals, difficulty in causing secondary pollution and the like, realizes the synergistic treatment of the desulfurization wastewater and the sludge, achieves the purpose of treating waste by waste, has good economic, social and environmental benefits, has important significance for standard-reaching discharge and zero-discharge treatment of the desulfurization wastewater of a thermal power plant, and has wide popularization and application prospects.
Drawings
FIG. 1 is a block diagram of the present invention.
Wherein, 1 is a preposed reaction clarifier, 2 is a sludge anaerobic fermentation device, 3 is an anaerobic bioreactor, 4 is a water distribution system, 5 is a three-phase separator, 6 is a sulfide micro-oxidation device, 7 is an aeration fan, 8 is an online oxidation reduction potentiometer, 9 is a mechanical scraper device, 10 is an elemental sulfur recovery device, 11 is an advanced treatment system, and 12 is a fan.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments, and are not intended to limit the scope of the present disclosure. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, shall fall within the protection scope of the present invention.
There is shown in the drawings a schematic block diagram of a disclosed embodiment in accordance with the invention. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
Referring to fig. 1, the system for biologically softening desulfurization wastewater and recovering elemental sulfur comprises a pre-reaction clarifier 1, a sludge anaerobic fermentation device 2, an anaerobic bioreactor 3, a water distribution system 4, a three-phase separator 5, a sulfide micro-oxidation device 6, an aeration fan 7, an online oxidation-reduction potentiometer 8, a mechanical scraper device 9, an elemental sulfur recovery device 10, an advanced treatment system 11 and a fan 12.
The water outlet of the preposed reaction clarifier 1 and the water outlet of the sludge anaerobic fermentation device 2 are converged and communicated with the water inlet on the side face of the bottom of the anaerobic bioreactor 3, a water distribution system 4 and a three-phase separator 5 are sequentially arranged in the anaerobic bioreactor from bottom to top, wherein the water distribution system is communicated with the water inlet, the water outlet of the three-phase separator is communicated with the inlet of a sulfide micro-oxidation device 6, and the water outlet of the sulfide micro-oxidation device is communicated with an advanced treatment system 11. The water outlet of the three-phase separator is communicated with the upper part of the front reaction clarifier, and the upper exhaust port of the sulfide micro-oxidation device is communicated with the lower part of the liquid level of the front reaction clarifier. The lateral surface of the sulfide micro-oxidation device is communicated with the elemental sulfur recovery device 10. The sludge discharge pipe on the side of the anaerobic bioreactor is communicated with the upper part of the sludge anaerobic fermentation device.
The method for biologically softening desulfurization wastewater and recovering elemental sulfur comprises the following steps:
1) Desulfurization waste water and anaerobic bioreactor return fluid enter the preposed reaction clarifier 1 for buffer dilution, precipitation reaction and sludge discharge, thereby playing a role in buffer dilution of desulfurization waste water and reducing the operating pressure of a subsequent anaerobic bioreactor 3. Dissolved S in reflux2-And H produced by the sulphide oxidation unit2S gas enters S generated in wastewater2-And sulfide precipitates with small solubility product are generated by reaction with heavy metals in the desulfurization wastewater, so that the heavy metals are efficiently removed, and the toxicity of the sulfide precipitates to sulfate reducing bacteria in the anaerobic bioreactor is reduced.
2) The treated wastewater and sludge fermentation liquor generated by the anaerobic fermentation device 2 are mixed and enter the anaerobic bioreactor 3, the desulfurization wastewater contains rich sulfate ions and can provide an electron acceptor for Sulfate Reducing Bacteria (SRB), but the desulfurization wastewater has low organic matter concentration and is lack of a carbon source, the anaerobic sludge fermentation liquor is used as the carbon source to provide sufficient electron donor for the sulfate reduction process, the synergistic treatment of the desulfurization wastewater and the sludge is realized, and the purpose of treating waste by using waste is achieved; the discharged sludge enters a sludge anaerobic fermentation device 2 for sludge recycling;
under anaerobic conditions, SRB use organic matter as a source of carbon and electron donors for cell synthesis, sulfate (SO)4 2-) Reduction to Sulfide (SO)4 2-+e-→S2-) The removal of sulfate ions is realized;
the reaction temperature of the anaerobic bioreactor is 30-40 ℃, the pH value is controlled to be 7-8, and the carbon-sulfur ratio rho (COD)/rho (SO) is controlled4 2-) Is 2 to 3.
3) The treated wastewater enters a sulfide micro-oxidation device 6, an aeration fan 7 and an online oxidation-reduction potentiometer 8 are arranged in the device, the aeration quantity is accurately controlled according to the monitored oxidation-reduction potential, the sulfide is oxidized into elemental sulfur under the micro-aeration condition, the generated elemental sulfur foam is effectively scraped out in time through a mechanical scraper device 9 and enters an elemental sulfur recovery device 10; small amount of H produced2The S gas enters the pre-reaction clarifier through a fan 12.
4) The treated wastewater enters an advanced treatment system 11 for treatment.
According to the invention, the desulfurization wastewater is treated by a sulfate reducing bacteria anaerobic biological method, so that the sulfate and heavy metals in the desulfurization wastewater can be efficiently removed, and elemental sulfur is recovered by a micro-oxidation method, so as to replace the traditional triple box treatment process, realize the synergistic treatment of the desulfurization wastewater and sludge, and achieve the purpose of treating waste by waste. The method has the advantages of high treatment efficiency, low treatment cost, no need of dosing and no secondary pollution.
Claims (7)
1. A system and a method for biological softening of desulfurization wastewater and recovery of elemental sulfur are characterized by comprising a preposed reaction clarifier (1), a sludge anaerobic fermentation device (2), an anaerobic bioreactor (3), a sulfide micro-oxidation device (6), an elemental sulfur recovery device (10) and a deep treatment system (11);
the water outlet of the preposed reaction clarifier (1) and the water outlet of the sludge anaerobic fermentation device (2) are communicated with the water inlet of the side face of the bottom of the anaerobic bioreactor (3), a water distribution system (4) and a three-phase separator (5) are sequentially arranged in the anaerobic bioreactor from bottom to top, wherein the water distribution system (4) is communicated with the water inlet of the side face of the bottom of the anaerobic bioreactor (3), the water outlet of the three-phase separator (5) is communicated with the inlet of a sulfide micro-oxidation device (6), the water outlet of the sulfide oxidation device is communicated with a deep treatment system (11), the water outlet of the three-phase separator (5) is communicated with the upper part of the preposed reaction clarifier (1), the upper exhaust port of the sulfide micro-oxidation device (6) is communicated with the lower part of the liquid level of the preposed reaction clarifier (1), the side face of the sulfide micro-oxidation device (6) is communicated with a simple substance sulfur recovery device (10), and the sludge discharge pipe of the side face of the anaerobic bioreactor (3) is communicated with the upper part of the sludge anaerobic fermentation device (2).
2. The system and the method for biologically softening desulfurization waste water and recovering elemental sulfur according to claim 1, further comprising an aeration fan (7), wherein an outlet of the aeration fan (7) is communicated with the sulfide micro-oxidation device (6).
3. The system and the method for biologically softening desulfurization waste water and recovering elemental sulfur according to claim 1, characterized by further comprising a fan (12), wherein the top outlet of the sulfide micro-oxidation device (6) is communicated with the pre-reaction clarifier (1) through the fan (12).
4. A system and a method for biologically softening desulfurization wastewater and recovering elemental sulfur are characterized by comprising the following steps:
1) The desulfurization wastewater and the reflux liquid of the anaerobic bioreactor enter a preposed reaction clarifier (1) for buffer dilution, precipitation reaction and sludge discharge, and the dissolved S in the reflux liquid2-And H produced by sulfide micro-oxidation device2S gas enters S generated in wastewater2-The heavy metal in the desulfurization wastewater reacts to generate sulfide precipitate, so that the heavy metal is efficiently removed;
2) Mixing the treated wastewater with sludge fermentation liquor generated by a sludge anaerobic fermentation device (2), allowing the mixture to enter an anaerobic bioreactor (3), and reducing sulfate in the desulfurization wastewater into sulfide by using organic matters in the sludge fermentation liquor as a carbon source and an electron donor for cell synthesis by sulfate reducing bacteria under an anaerobic condition to remove sulfate ions; the discharged sludge enters a sludge anaerobic fermentation device (2) to be continuously fermented and recycled;
3) The treated wastewater enters a sulfide micro-oxidation device (6), sulfide is oxidized into elemental sulfur under the micro-aeration condition, the generated elemental sulfur foam is scraped out through a mechanical scraper device (9) and enters an elemental sulfur recovery device (10), the effluent enters an advanced treatment system (11) for treatment, and the generated H is treated2The S gas enters the liquid level of the preposed reaction clarifier (1) through a fan (12).
5. The system and method for biological softening of desulfurization waste water and recovery of elemental sulfur according to claim 4, characterized in that the pH of the pre-reactor clarifier is controlled at 8.
6. The system and method for biologically softening desulfurization waste water and recovering elemental sulfur as claimed in claim 4, wherein the reaction of the anaerobic bioreactorThe temperature is 30-40 ℃, the pH value is controlled to be 7-8, and the carbon-sulfur ratio rho (COD)/rho (SO) is controlled4 2-) Is 2 to 3.
7. The system and method for biologically softening desulfurization waste water and recovering elemental sulfur according to claim 4, wherein the oxidation-reduction potential of the sulfide micro-oxidation device is controlled to be S1mV＜ORP＜S2mV。
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| CN202210907421.7A CN115259560A (en) | 2022-07-29 | 2022-07-29 | System and method for biological softening of desulfurization wastewater and recovery of elemental sulfur |
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| CN202210907421.7A CN115259560A (en) | 2022-07-29 | 2022-07-29 | System and method for biological softening of desulfurization wastewater and recovery of elemental sulfur |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101219844A (en) * | 2008-01-23 | 2008-07-16 | 太原理工大学 | A kind of process of biological treatment of acid mine wastewater |
| CN102153228A (en) * | 2011-01-26 | 2011-08-17 | 中节能六合天融环保科技有限公司 | Method for treating wet magnesium desulfuration wastewater |
| CN202297317U (en) * | 2011-11-04 | 2012-07-04 | 张再峰 | System for treating acid washing heavy metal waste water of steel wire ropes |
| CN111099784A (en) * | 2018-10-26 | 2020-05-05 | 中国石油化工股份有限公司 | Treatment method of desulfurization wastewater |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101219844A (en) * | 2008-01-23 | 2008-07-16 | 太原理工大学 | A kind of process of biological treatment of acid mine wastewater |
| CN102153228A (en) * | 2011-01-26 | 2011-08-17 | 中节能六合天融环保科技有限公司 | Method for treating wet magnesium desulfuration wastewater |
| CN202297317U (en) * | 2011-11-04 | 2012-07-04 | 张再峰 | System for treating acid washing heavy metal waste water of steel wire ropes |
| CN111099784A (en) * | 2018-10-26 | 2020-05-05 | 中国石油化工股份有限公司 | Treatment method of desulfurization wastewater |
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