CN113620522A - Sewage treatment process - Google Patents
Sewage treatment process Download PDFInfo
- Publication number
- CN113620522A CN113620522A CN202110928426.3A CN202110928426A CN113620522A CN 113620522 A CN113620522 A CN 113620522A CN 202110928426 A CN202110928426 A CN 202110928426A CN 113620522 A CN113620522 A CN 113620522A
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- CN
- China
- Prior art keywords
- sludge
- tank
- sewage
- reaction tank
- biological
- 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
- 239000010865 sewage Substances 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000010802 sludge Substances 0.000 claims abstract description 64
- 238000006243 chemical reaction Methods 0.000 claims abstract description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 14
- 238000004062 sedimentation Methods 0.000 claims abstract description 13
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 10
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 7
- 229930195729 fatty acid Natural products 0.000 claims abstract description 7
- 239000000194 fatty acid Substances 0.000 claims abstract description 7
- 150000004665 fatty acids Chemical class 0.000 claims abstract description 7
- 239000000126 substance Substances 0.000 claims abstract description 7
- 239000006228 supernatant Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000003344 environmental pollutant Substances 0.000 claims description 6
- 231100000719 pollutant Toxicity 0.000 claims description 6
- 230000018044 dehydration Effects 0.000 claims description 5
- 238000006297 dehydration reaction Methods 0.000 claims description 5
- 238000004065 wastewater treatment Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 239000013049 sediment Substances 0.000 claims description 3
- 239000013589 supplement Substances 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5209—Regulation methods for flocculation or precipitation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- 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
- C02F2101/30—Organic 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
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
-
- 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
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a sewage treatment process, which treats sewage by arranging a grid, an adjusting tank, a pretreatment tank, a biological reaction tank, a sedimentation tank, a sludge concentration tank and a high-grade oxidation reaction tank, wherein the high-grade oxidation reaction tank generates part of volatile fatty acid and micromolecule organic substances which can be used as a biological carbon source to be supplemented into a biological treatment link to form effective circulation, so that the purpose of reducing the residual sludge as the biological carbon source is achieved.
Description
Technical Field
The invention relates to a sewage treatment process, in particular to a sewage treatment process.
Background
In the sewage treatment process, the activated sludge method is economic and reliable and is a common technical means for sewage treatment, but a large amount of excess sludge generated at the same time not only needs additional treatment, but also increases the burden of solid waste disposal. The common sludge treatment and disposal methods include sludge dehydration and landfill, incineration or resource utilization.
In order to solve the problem of insufficient carbon source, an additional carbon source is added, but the addition of the additional carbon source not only increases the treatment cost, but also causes more excess sludge, thereby increasing the cost of sludge treatment. The excess sludge is a good biological carbon source, so a method for reducing and utilizing the excess sludge in sewage treatment is needed, the treated sludge is used as the biological carbon source to replace or partially replace an external carbon source, and the purpose of reducing the sludge is realized at the same time
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the technology and provide a sewage treatment process.
In order to solve the technical problems, the technical scheme provided by the invention is a sewage treatment process, which comprises the following steps:
step 1), removing floating objects and suspended matters in the sewage through a grating device, and then flowing into an adjusting tank to adjust the water quality or water quantity;
step 2) pretreating the sewage obtained in the step 1, feeding the obtained sludge sediment into a sludge concentration tank, and feeding the obtained liquid into a biological reaction tank;
step 3) treating the sewage in the biological reaction tank by using an activated sludge method, and entering a sedimentation tank after the treatment is finished;
step 4), returning one part of the sludge generated by the sedimentation tank to a biological reaction tank as biological supplement, and feeding the other part of the sludge into a sludge concentration tank, wherein the supernatant generated by the sedimentation tank is discharged after reaching the standard or discharged after reaching the standard after advanced treatment;
step 5), returning supernatant generated by the sludge concentration tank to a biological reaction tank for secondary treatment, and treating sludge generated by the sludge concentration tank in an advanced oxidation reaction tank;
step 6), treating the sludge in an advanced oxidation reaction tank to generate cell disintegration so as to generate partial volatile fatty acid and micromolecular organic substances, wherein the partial volatile fatty acid and the micromolecular organic substances can be used as a biological carbon source to be supplemented into a biological reaction tank, and the rest sludge is treated and then enters a sludge concentration tank;
and 7) sludge in the sludge concentration tank is transported outside after sludge dehydration and is subjected to standardized disposal.
Further, the pretreatment includes treatment of particulate pollutants and partially soluble pollutants in the wastewater.
Further, the sludge in the sludge concentration tank is sent to a dehydrator by a screw pump for dehydration, then is transported outwards and is subjected to compliance treatment.
Further, the supernatant produced by the sedimentation tank directly reaches the standard and is discharged or reaches the standard after advanced treatment according to the effluent standard.
Compared with the prior art, the invention has the advantages that: the invention treats sewage and sludge by arranging the grating, the adjusting tank, the pretreatment, the biological reaction tank, the sedimentation tank, the sludge concentration tank and the advanced oxidation reaction tank, and simultaneously, the advanced oxidation reaction tank generates part of volatile fatty acid and micromolecule organic substances which can be used as a biological carbon source to be supplemented into a biological treatment link to form effective circulation, thereby realizing the reduction purpose when residual sludge is used as the biological carbon source.
Drawings
FIG. 1 is a schematic view of a process flow of a wastewater treatment process of the present invention.
Detailed Description
A sewage treatment process according to the present invention will be described in further detail with reference to examples.
Example 1
The method comprises the following steps that the sewage passes through a grating device to remove floating matters and suspended matters in the sewage, then the sewage flows into an adjusting tank to adjust the water quality or the water quantity, the obtained sewage is pretreated, the pretreatment comprises the treatment of granular pollutants and partial soluble pollutants in the sewage, the obtained sludge sediment enters a sludge concentration tank, the obtained liquid enters a biological reaction tank, the sewage in the biological reaction tank is treated by using an activated sludge method, the sewage enters a sedimentation tank after the treatment is finished, one part of the sludge generated by the sedimentation tank is used as biological supplement and flows back to the biological reaction tank, the other part of the sludge enters the sludge concentration tank, the supernatant generated by the sedimentation tank is directly discharged up to the standard or discharged up to the standard after the deep treatment according to a water outlet standard, the supernatant generated by the sludge concentration tank flows back to the biological reaction tank to carry out secondary treatment, and the sludge generated by the positioned sludge concentration tank enters a high-grade oxidation reaction tank to be treated, the sludge is treated in the advanced oxidation reaction tank to generate cell disintegration, partial volatile fatty acid and small molecular organic substances are generated and can be used as a biological carbon source to be supplemented into the biological reaction tank to form effective circulation, so that the purpose of reducing the residual sludge serving as the biological carbon source is achieved, the residual sludge is treated and then enters the sludge concentration tank, and the sludge in the sludge concentration tank is conveyed into a dehydrator by a screw pump to be dehydrated and then is transported out and subjected to compliant treatment.
The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (4)
1. A sewage treatment process is characterized by comprising the following steps:
step 1), removing floating objects and suspended matters in the sewage through a grating device, and then flowing into an adjusting tank to adjust the water quality or water quantity;
step 2) pretreating the sewage obtained in the step 1, feeding the obtained sludge sediment into a sludge concentration tank, and feeding the obtained liquid into a biological reaction tank;
step 3) treating the sewage in the biological reaction tank by using an activated sludge method, and entering a sedimentation tank after the treatment is finished;
step 4), returning one part of the sludge generated by the sedimentation tank to a biological reaction tank as biological supplement, and feeding the other part of the sludge into a sludge concentration tank, wherein the supernatant generated by the sedimentation tank is discharged after reaching the standard or discharged after reaching the standard after advanced treatment;
step 5), returning supernatant generated by the sludge concentration tank to a biological reaction tank for secondary treatment, and treating sludge generated by the sludge concentration tank in an advanced oxidation reaction tank;
step 6), treating the sludge in an advanced oxidation reaction tank to generate cell disintegration so as to generate partial volatile fatty acid and micromolecular organic substances, wherein the partial volatile fatty acid and the micromolecular organic substances can be used as a biological carbon source to be supplemented into a biological reaction tank, and the rest sludge is treated and then enters a sludge concentration tank;
and 7) sludge in the sludge concentration tank is transported outside after sludge dehydration and is subjected to standardized disposal.
2. The wastewater treatment process according to claim 1, characterized in that: the pretreatment comprises the treatment of granular pollutants and partial soluble pollutants in the sewage.
3. The wastewater treatment process according to claim 1, characterized in that: and the sludge in the sludge concentration tank is sent into a dehydrator by a screw pump for dehydration, then is transported outwards and is subjected to the regulated treatment.
4. The wastewater treatment process according to claim 1, characterized in that: and supernatant generated by the sedimentation tank is directly discharged after reaching the standard according to the effluent standard or discharged after reaching the standard after advanced treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110928426.3A CN113620522A (en) | 2021-08-13 | 2021-08-13 | Sewage treatment process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110928426.3A CN113620522A (en) | 2021-08-13 | 2021-08-13 | Sewage treatment process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113620522A true CN113620522A (en) | 2021-11-09 |
Family
ID=78385106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110928426.3A Pending CN113620522A (en) | 2021-08-13 | 2021-08-13 | Sewage treatment process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113620522A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104030526A (en) * | 2014-06-06 | 2014-09-10 | 卢琴芳 | Pre-position sludge dewatering-based wastewater treatment process |
| CN108439750A (en) * | 2018-02-02 | 2018-08-24 | 东华大学 | A method of it is reduced using Fenton oxidation realization sludge recessive growth and strengthens wastewater treatment |
| CN111138041A (en) * | 2020-01-22 | 2020-05-12 | 大连安能杰科技有限公司 | Sewage treatment system for carbon source circulating sludge reduction and sewage treatment method using system |
-
2021
- 2021-08-13 CN CN202110928426.3A patent/CN113620522A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104030526A (en) * | 2014-06-06 | 2014-09-10 | 卢琴芳 | Pre-position sludge dewatering-based wastewater treatment process |
| CN108439750A (en) * | 2018-02-02 | 2018-08-24 | 东华大学 | A method of it is reduced using Fenton oxidation realization sludge recessive growth and strengthens wastewater treatment |
| CN111138041A (en) * | 2020-01-22 | 2020-05-12 | 大连安能杰科技有限公司 | Sewage treatment system for carbon source circulating sludge reduction and sewage treatment method using system |
Non-Patent Citations (1)
| Title |
|---|
| 中国环境监测总站, 中国环境出版集团 * |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211109 |
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| RJ01 | Rejection of invention patent application after publication |