CN114014438A - Sewage phosphorus recovery method based on pipe network ferrocyanide catcher - Google Patents
Sewage phosphorus recovery method based on pipe network ferrocyanide catcher Download PDFInfo
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- CN114014438A CN114014438A CN202110672157.9A CN202110672157A CN114014438A CN 114014438 A CN114014438 A CN 114014438A CN 202110672157 A CN202110672157 A CN 202110672157A CN 114014438 A CN114014438 A CN 114014438A
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- Prior art keywords
- ferrocyanide
- sewage
- catcher
- pipeline
- trap
- Prior art date
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- 239000010865 sewage Substances 0.000 title claims abstract description 43
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 229910052698 phosphorus Inorganic materials 0.000 title claims abstract description 21
- 239000011574 phosphorus Substances 0.000 title claims abstract description 21
- 238000011084 recovery Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 68
- 229910052742 iron Inorganic materials 0.000 claims abstract description 33
- 239000003575 carbonaceous material Substances 0.000 claims abstract description 15
- 244000005700 microbiome Species 0.000 claims abstract description 14
- 239000012528 membrane Substances 0.000 claims abstract description 12
- 238000012423 maintenance Methods 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims abstract description 4
- 229910052751 metal Inorganic materials 0.000 claims abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 239000000945 filler Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 239000013078 crystal Substances 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000010439 graphite Substances 0.000 claims description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 230000027756 respiratory electron transport chain Effects 0.000 claims description 3
- 238000005728 strengthening Methods 0.000 claims description 2
- -1 ferrihydrite Chemical compound 0.000 claims 2
- 239000006229 carbon black Substances 0.000 claims 1
- 239000000969 carrier Substances 0.000 claims 1
- 229910052595 hematite Inorganic materials 0.000 claims 1
- 239000011019 hematite Substances 0.000 claims 1
- AEIXRCIKZIZYPM-UHFFFAOYSA-M hydroxy(oxo)iron Chemical compound [O][Fe]O AEIXRCIKZIZYPM-UHFFFAOYSA-M 0.000 claims 1
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 claims 1
- 150000002739 metals Chemical class 0.000 claims 1
- 239000011148 porous material Substances 0.000 claims 1
- 241000894006 Bacteria Species 0.000 abstract 1
- 125000004122 cyclic group Chemical group 0.000 abstract 1
- 230000000737 periodic effect Effects 0.000 abstract 1
- 238000004064 recycling Methods 0.000 abstract 1
- 238000003786 synthesis reaction Methods 0.000 description 6
- 229910019142 PO4 Inorganic materials 0.000 description 5
- 235000021317 phosphate Nutrition 0.000 description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 4
- 239000010452 phosphate Substances 0.000 description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000002367 phosphate rock Substances 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 238000011946 reduction process Methods 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910001448 ferrous ion Inorganic materials 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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
- C02F3/28—Anaerobic digestion processes
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/37—Phosphates of heavy metals
- C01B25/375—Phosphates of heavy metals of iron
-
- 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
- C02F2101/105—Phosphorus compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2307/00—Location of water treatment or water treatment device
- C02F2307/08—Treatment of wastewater in the sewer, e.g. to reduce grease, odour
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Inorganic Chemistry (AREA)
- Water Treatment By Sorption (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention discloses a ferrocyanide trap for phosphorus recovery of a sewage pipe network, which is characterized in that the trap is installed at a pipeline interface, iron ore and carbon-based materials are added, and a target product ferrocyanide can be recovered during the periodic maintenance and disassembly of a pipeline. The iron ore in the catcher can be used as a supplementary iron source, and the carbon-based material is used as a biological enrichment carrier. And when the pipeline is overhauled, the catcher is disassembled, and a target product, namely the ferrocyanide in the catcher is collected. The dissimilatory metal reducing bacteria used in the invention are derived from sewage, and are convenient to enrich; the iron ore added from the external source has low price and is economical and practical; the carbon-based material for loading the microorganisms has wide sources and stable properties. In addition, a flange is additionally arranged between the catcher and the pipeline interface, so that the tight connection with the pipeline is ensured. The addition of a filter membrane can prevent product loss. The invention designs a new device for the resource treatment of sewage, is expected to save the cost of recycling the ferrocyanide and realizes the cyclic utilization of phosphorus resources.
Description
(I) technical field
The invention relates to a process for reducing exogenously added iron ore by dissimilatory metal reducing microorganisms, soluble ferrous ions are obtained through the process and are combined with phosphate in sewage to form a product ferrocyanide. Meanwhile, the detachable ferrocyanide trap is arranged at the joint of the sewage pipeline, and the enrichment and recovery of products are realized by using organic matters in the sewage as an electron donor and phosphate as a phosphorus source for synthesizing the ferrocyanide and an anaerobic environment in the pipeline, belonging to the technical field of wastewater treatment and resource utilization.
(II) background of the invention
In recent years, the synthesis of ferrocyanide to recover phosphorus from domestic sewage has received much attention. As a stable phosphate rock, the phosphate rock can stably exist within the range of pH6-9, and the efficiency of recovering phosphorus from sewage is greatly improved. On the one hand, the sewage contains a large amount of organic matters and phosphates, which provides a material basis for the synthesis of the ferrocyanide. On the other hand, the closing of the sewage pipe network provides anaerobic environmental conditions for the synthesis of the ferrocyanide, and the sinking ferrocyanide catcher connected by the flange is arranged at the joint of the pipe network, so that the anaerobic environment can be created for the synthesis of the ferrocyanide by means of the characteristics of the pipe network, the recovery efficiency of products can be expected to be greatly improved, and the recovery cost is reduced.
Because the domestic sewage contains more organic matters, the loaded iron ore is used as an external iron source, the dissimilatory metal reduction microorganism can fully utilize the organic matters in the sewage as an electron donor, and ferric iron is converted into ferrous iron through the iron reduction effect and is combined with phosphate to form ferrocyanide. When sewage flows through the interface, a part of sewage sinks to the catcher due to the action of gravity, and the enrichment and recovery of the ferrocyanide can be realized in the micro-reactor, so that the reaction is more complete. In addition, the addition of the carbon-based material can accelerate the reduction process of the dissimilatory iron, thereby improving the synthesis efficiency of the ferrocyanide and improving the recovery rate of phosphorus resources. Therefore, the invention designs a novel device which is arranged at the joint of a sewage pipe network and utilizes dissimilatory reducing microorganisms to synthesize a phosphorus mineral, namely ferrocyanide, thereby realizing the resource application of sewage.
(III) purpose
The invention aims to design a catcher which is arranged at a sewage pipe network interface and promotes the synthesis and recovery of ferrocyanide, thereby recovering phosphorus in sewage and realizing the resource utilization of sewage.
(IV) technical scheme
In order to solve the problems, the invention adopts the following technical scheme:
the invention utilizes the iron reduction effect of dissimilatory iron reduction microorganisms under anaerobic conditions to recover phosphorus in the form of ferrocyanide. The method is characterized in that the anaerobic environment of a sewage pipe network and the hydraulic sinking action at the interface are utilized, iron ore is added as an iron source, a carbon-based material is added as an enrichment carrier of sewage microorganisms, a flange is arranged at a branch pipe of the interface, namely the mounting position of the catcher, and a filter membrane is arranged at the lower side of the flange. The specific arrangement of each part structure is as follows:
carbon-based material: before the trap is installed, a carbon-based material is added to serve as an enrichment carrier of the sewage microorganisms and play a role in strengthening electron transfer.
Iron ore: iron ore particles such as iron oxide are added as an iron source before the trap is installed.
Flange (preferred): an annular sealing washer is arranged at the joint of the flange and the catcher, and four threaded holes are uniformly formed in the outer side of the flange. The flange material is consistent with the pipeline material. Its function is to ensure adequate connection of the trap to the pipe.
Filter membrane (preferred): the aperture of the filter membrane is micron level, which ensures the sewage to flow into the trap and prevents the filler and the target product in the trap from being washed out by water flow.
A ferrocyanide trap: maintaining the gap of the pipeline, detaching the catcher, centrifuging the content, and performing vacuum drying and preservation on the obtained blue-green crystal to obtain the target product ferrocyanide.
The invention creatively provides a view of arranging the mineral catcher at the pipe network interface, which has the beneficial effects that the catcher is arranged at the pipe network interface, and the product is recovered during the maintenance of the pipeline. The carbon-based material and the iron ore particles are added as the filler, so that the iron source synthesized by the ferrocyanide is supplemented, the enrichment and electron transfer of microorganisms are enhanced, and the recovery rate of the ferrocyanide and the recovery rate of phosphorus are greatly improved. While realizing phosphorus recovery, the dephosphorization pressure at the later stage of the pipe network is reduced and the dosage of the iron flocculant is reduced. In addition, the device can also control the pipeline corrosion, and mineral is concentrated in the trapper after being recovered, so that the pipeline can be prevented from being blocked.
(V) description of the drawings
Fig. 1 is a cross-sectional view of the trap.
Fig. 2 is a microscopic view of the surface of the carbon-based material.
FIG. 3 is a micro-mechanistic diagram of the iron reduction process.
(VI) detailed description of the preferred embodiment
The present invention is further described below with reference to examples, but embodiments of the present invention are not limited thereto.
Example 1:
adding Fe before installing the trap2O3Particles and graphite. And (4) mounting a filter membrane at the interface of the catcher, and mounting and fixing by using a flange containing an annular sealing ring. The sewage in the main pipeline flows through the position and flows into the catcher under the action of gravity, and Fe in the filler is subjected to the action of dissimilatory iron reducing microorganisms in the sewage2O3Reduction occurs, and under the promoting action of graphite, the graphite is combined with phosphorus in the sewage to form ferrocyanide. The ferroconite gradually crystallizes and accumulates to form solid crystals with the particle size of micron, and the solid crystals cannot be entrained by water flow and lost due to the obstruction of the filter membrane. When the pipeline is maintained, the filter membrane of the catcher is detached and replaced, the sediment in the catcher is subjected to centrifugal treatment, and the obtained product is dried in vacuum and stored in an anaerobic manner. And after the pipeline maintenance is finished, adding the filler again and installing the catcher for use.
Example 2:
before the trap is installed, ferrihydrite particles and activated carbon particles are added. And (4) mounting a filter membrane at the interface of the catcher, and mounting and fixing by using a flange containing an annular sealing ring. The sewage flows through the trap and flows into the trap under the action of gravity, iron in the ferrihydrite is reduced under the action of dissimilatory iron reducing microorganisms in the sewage, and the ferrihydrite is combined with phosphorus in the sewage to form ferrocyanide under the promoting action of the activated carbon. The ferroconite gradually crystallizes and accumulates to form solid crystals with a particle size of micrometers. When the pipeline is maintained, the catcher is disassembled, the filter membrane is replaced, the sediment in the catcher is subjected to centrifugal treatment, and the obtained product is dried in vacuum and stored in an anaerobic manner. And after the pipeline maintenance is finished, adding the filler again and installing the catcher for use.
Example 3:
before the trap is installed, the hexafine iron particles are added. And (4) mounting a filter membrane at the interface of the catcher, and mounting and fixing by using a flange containing an annular sealing ring. The sewage in the main pipeline flows through the position, flows into the catcher due to the action of gravity, and iron in the hexawurtzite is reduced under the action of dissimilatory iron reducing microorganisms in the sewage and is combined with phosphorus in the sewage to form ferrocyanide. The ferroconite gradually crystallizes and accumulates. When the pipeline is maintained, the catcher is disassembled to replace the filter membrane, and the obtained product is dried in vacuum and stored in an anaerobic way. And after the pipeline maintenance is finished, adding the filler again and installing the catcher for use.
Example 4:
the trap can be applied to urban sewage pipe networks. The sewage of urban industrial areas, office areas and residential areas is converged into a main pipeline, and contains a large amount of organic phosphorus and phosphate. The catcher is installed at the inspection well interface of the pipeline, and the pipe diameter and the material of the catcher are consistent with the diameter and the material of the interface. The catcher is loaded with iron ore and carbon materials, and the product of the ferrocyanide is recovered when the pipe network is overhauled.
Example 5:
the trap can be applied to sewer pipes of residential buildings. Domestic sewage in a kitchen pool, a toilet bowl, a bathtub and a floor drain of a toilet is rich in phosphorus and organic matters, the trap is loaded with iron ores and carbon materials before being installed at a gathering part of a sewer pipeline, and the trap is detached and a target product is collected when the pipeline is inspected and maintained. The method can fully utilize substances in water to realize phosphorus recovery.
The above description is only for the preferred embodiment of the present invention, but the present invention is not limited thereto, and any person skilled in the art can change, replace, combine, modify and simplify the essence, principle and concept of the present invention within the technical scope of the present invention, and all equivalent replacement ways are considered to be included in the protection scope of the present invention.
Claims (5)
1. A ferrocyanide trap (1) of a sewage pipe network is installed at the joint of the sewage pipe network or the water outlet pipeline of a residential building and the like based on the reduction effect of dissimilatory metals, and carbon-based materials and iron ore are added under the anaerobic condition, so that the recovery of ferrocyanide and sewage phosphorus is realized. The method is characterized in that sewage is converged by utilizing the gravity sinking of water flow at an interface, iron ore (2) and carbon-based material (3) are added from an external source to serve as microorganism carriers, so that the formation of ferrocyanide crystals is promoted, and meanwhile, the ferrocyanide collected in a catcher is recovered during the period of regular maintenance and disassembly of a pipeline, so that the recovery and utilization of phosphorus resources in the sewage are realized.
2. The invention according to claim 1, characterized in that iron ore particles (2) are added inside the trap (1) as a supplementary iron source and filler. The iron ore (2) comprises hematite, ferrihydrite, lepidocrocite and the like.
3. The invention according to claim 1, characterized in that a carbon-based material (3) is added inside the trap (1) as a carrier for the enrichment of microorganisms of sewage while strengthening the electron transfer process of the microorganisms, the carbon-based material (3) including graphite, activated carbon, biochar, carbon black, and the like.
4. The invention according to claim 1, characterized in that a flange (4) is provided between the trap (1) and the manhole, inside which there is an annular sealing gasket (5). The flange material is consistent with the pipeline.
5. The invention according to claim 1, characterized in that a filter membrane (6) with micron-sized pore size is installed at the lower end of the flange (4) of the trap (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110672157.9A CN114014438A (en) | 2021-06-18 | 2021-06-18 | Sewage phosphorus recovery method based on pipe network ferrocyanide catcher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110672157.9A CN114014438A (en) | 2021-06-18 | 2021-06-18 | Sewage phosphorus recovery method based on pipe network ferrocyanide catcher |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114014438A true CN114014438A (en) | 2022-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110672157.9A Pending CN114014438A (en) | 2021-06-18 | 2021-06-18 | Sewage phosphorus recovery method based on pipe network ferrocyanide catcher |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104445555A (en) * | 2014-03-17 | 2015-03-25 | 友达光电股份有限公司 | Wastewater dephosphorization method and preparation method of ferrous phosphate |
| CN106865682A (en) * | 2017-04-14 | 2017-06-20 | 北京师范大学 | Ferrihydrite MF/UF dual-membrane process organics removal and phosphatic method |
| CN108585271A (en) * | 2018-05-08 | 2018-09-28 | 安徽科技学院 | A method of recycling P elements from sewage |
| CN110691758A (en) * | 2017-03-15 | 2020-01-14 | 威特苏斯基金会,欧洲可持续水处理技术卓越中心 | Method and system for recovering phosphate from a stream |
| CN112645447A (en) * | 2020-11-30 | 2021-04-13 | 苏州科技大学 | System and process for recycling vivianite from phosphorus-containing wastewater |
-
2021
- 2021-06-18 CN CN202110672157.9A patent/CN114014438A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104445555A (en) * | 2014-03-17 | 2015-03-25 | 友达光电股份有限公司 | Wastewater dephosphorization method and preparation method of ferrous phosphate |
| CN110691758A (en) * | 2017-03-15 | 2020-01-14 | 威特苏斯基金会,欧洲可持续水处理技术卓越中心 | Method and system for recovering phosphate from a stream |
| CN106865682A (en) * | 2017-04-14 | 2017-06-20 | 北京师范大学 | Ferrihydrite MF/UF dual-membrane process organics removal and phosphatic method |
| CN108585271A (en) * | 2018-05-08 | 2018-09-28 | 安徽科技学院 | A method of recycling P elements from sewage |
| CN112645447A (en) * | 2020-11-30 | 2021-04-13 | 苏州科技大学 | System and process for recycling vivianite from phosphorus-containing wastewater |
Non-Patent Citations (1)
| Title |
|---|
| 王聪等: "石墨强化微生物异化铁还原合成蓝铁石的磷回收研究", 《环境科学学报》, vol. 39, no. 10, pages 3325 - 3332 * |
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