CN112897820A - Equipment and method for treating sewage by talcum powder high-concentration activated sludge process - Google Patents
Equipment and method for treating sewage by talcum powder high-concentration activated sludge process Download PDFInfo
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- CN112897820A CN112897820A CN202110342183.5A CN202110342183A CN112897820A CN 112897820 A CN112897820 A CN 112897820A CN 202110342183 A CN202110342183 A CN 202110342183A CN 112897820 A CN112897820 A CN 112897820A
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- sludge
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- talcum powder
- talc
- activated sludge
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- 239000010802 sludge Substances 0.000 title claims abstract description 113
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 41
- 239000010865 sewage Substances 0.000 title claims abstract description 16
- 238000004062 sedimentation Methods 0.000 claims abstract description 24
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 230000000694 effects Effects 0.000 claims abstract description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 7
- 239000001301 oxygen Substances 0.000 claims abstract description 7
- 230000001360 synchronised effect Effects 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims description 18
- 229910052623 talc Inorganic materials 0.000 claims description 16
- 235000012222 talc Nutrition 0.000 claims description 16
- 239000000454 talc Substances 0.000 claims description 16
- 238000011084 recovery Methods 0.000 claims description 10
- 238000001556 precipitation Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 5
- 238000000151 deposition Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 238000004065 wastewater treatment Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 239000003344 environmental pollutant Substances 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 231100000719 pollutant Toxicity 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 abstract description 2
- 239000013589 supplement Substances 0.000 abstract description 2
- 239000006247 magnetic powder Substances 0.000 description 8
- 239000008394 flocculating agent Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000000701 coagulant Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000012163 sequencing technique 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
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
-
- 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
- C02F3/302—Nitrification and denitrification treatment
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention provides a talcum powder high-concentration activated sludge process sewage treatment device and a method thereof, which comprises a biochemical tank, a mixing reaction tank and a sedimentation tank which are sequentially communicated, wherein the mixing reaction tank is provided with a talcum powder and flocculant adding system; the sedimentation tank is provided with a sludge return pipeline communicated with the biochemical tank and a residual sludge discharge pipeline. The invention uses talcum powder as the weighting material of activated sludge. The invention can obviously improve the sedimentation performance of the activated sludge, improve the sedimentation effect, is beneficial to maintaining high-concentration activated sludge and achieves the effect of removing pollutants at a higher level; the talcum powder can reduce the abrasion of equipment and does not influence biochemical treatment; the talcum powder discharged along with the residual sludge can be recycled, and if the talcum powder is not recycled, a small amount of supplement is needed continuously, so that the cost is not high. The biochemical tank is divided into an anoxic section and an aerobic section, and the aerobic front section runs with low dissolved oxygen, so that a strong synchronous nitrification and denitrification effect is achieved.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to a device and a method for treating sewage by a talcum powder high-concentration activated sludge process.
Background
The high-concentration activated sludge process is a new sewage treatment process, and by increasing the concentration of the activated sludge, remarkable synchronous nitrification and denitrification can be formed, the dependence on a carbon source is reduced, and the capability of removing total nitrogen and other pollutants is greatly improved. China firstly discovers the method, continuously researches various technologies for realizing the method, and also starts to research the method abroad in recent years.
After the concentration of the activated sludge is increased, the sedimentation capacity of the activated sludge is rapidly reduced, so that the sedimentation tank is difficult to stably maintain the high-concentration activated sludge of the system. In order to improve the settling capacity of activated sludge, a process of adding a flocculant and a heavy substance such as magnetic powder and silt in an activated sludge process has been developed.
These heavy materials, either magnetic powders or silt, can severely wear equipment.
Moreover, the magnetic powder is expensive, needs to be recovered, is troublesome to operate, and increases the cost.
Disclosure of Invention
In order to solve the defects of the existing high-concentration activated sludge method, the invention provides a wastewater treatment device and a wastewater treatment method by a talcum powder high-concentration activated sludge method, wherein talcum powder is used as a weighting substance of activated sludge.
The talcum powder high-concentration activated sludge process sewage treatment equipment comprises a biochemical tank, a mixing reaction tank and a sedimentation tank which are sequentially communicated, wherein the mixing reaction tank is provided with a talcum powder and flocculant adding system; the sedimentation tank is provided with a sludge return pipeline communicated with the biochemical tank and a residual sludge discharge pipeline.
Preferably, the talcum powder high-concentration activated sludge process sewage treatment equipment comprises a talcum powder recovery device and a mud storage tank, wherein stirring equipment is arranged in the mud storage tank, the mud storage tank is communicated with a residual sludge discharge pipeline of the sedimentation tank, a talcum powder recovery outlet is formed in the bottom of the mud storage tank, and a sludge discharge port is formed in the upper part of the mud storage tank.
The invention also provides a sewage treatment method by the high-concentration activated sludge process with the talcum powder, wherein the talcum powder is used as a weighting substance of the activated sludge.
Specifically, the mixed liquid from the biochemical tank firstly enters a mixing reaction tank, talcum powder and a flocculating agent are added into the mixed liquid by a talcum powder and flocculating agent adding system, and form flocs with good settling property together with activated sludge, then the flocs enter a sedimentation tank for mud-water separation, clear water is discharged, sludge flows back to the biochemical tank, residual sludge is discharged, talcum powder in the residual sludge can be recovered, and if the talcum powder is not recovered, a small amount of talcum powder discharged along with the residual sludge needs to be supplemented.
Also comprises a talcum powder recovery step, which comprises 4 steps of mud feeding, stirring, sedimentation and mud discharging, and comprises the following steps of sequencing batch operation:
and 3, precipitation: stopping stirring, starting precipitation, and depositing at a faster speed due to the fact that the specific gravity of the talcum powder is greater than that of the activated sludge, wherein the talcum powder is firstly deposited at the bottom of the sludge storage tank, and the activated sludge is deposited on the talcum powder;
Talc powder is white or quasi-white, fine, and non-gritty powder. No odor, no taste, no toxicity, stable chemical property and water insolubility. Therefore, the method can not affect the biochemical treatment process like micro-sand, magnetic powder or silt.
Talc powder is widely applied in the field of water treatment, such as coagulant, coagulant aid, filter aid, adsorbent, oil absorbent and the like, and has also been used as a weighting substance in the treatment of oil-containing sludge.
The talcum powder has a specific gravity between that of the silt and the magnetic powder, so the weighting effect is good and is better than that of the silt, the settling property of the floc can be obviously improved, but the talcum powder is easier to suspend in a biochemical tank, does not need to be particularly intensively stirred to increase the energy consumption and is better than that of the magnetic powder.
The talcum powder is cheap, does not depend on recovery, and is superior to magnetic powder.
The talcum powder is soft, has lubricity, cannot wear equipment, and is superior to magnetic powder or sediment.
The talcum powder has low mechanical strength, is easy to crush and can be continuously ground in a system, so that the need of seeking superfine powder is avoided, and the purchase cost can be reduced.
The biochemical pool is divided into an anoxic section and an aerobic section, and the aerobic section runs at low dissolved oxygen to achieve strong synchronous nitrification and denitrification effects.
The invention has the beneficial effects that:
(1) the talcum powder is used as a weighting substance for flocculation precipitation, can obviously improve the sedimentation performance of the activated sludge, improves the precipitation effect, is beneficial to maintaining the high-concentration activated sludge of a biochemical system, achieves strong synchronous nitrification and denitrification effect, obtains higher-level pollutant removal effect, operates with low dissolved oxygen, is low-carbon and saves energy.
(2) The talcum powder can reduce the abrasion of equipment and does not influence biochemical treatment.
(3) The talcum powder discharged along with the residual sludge can be recycled, and if the talcum powder is not recycled, a small amount of supplement is needed continuously, so that the cost is not high.
(4) The talcum powder in the residual sludge can be recovered by adopting a gravity method.
Drawings
FIG. 1 is a schematic view of the structure of the apparatus of the present invention.
FIG. 2 is a schematic view of the structure of the talc powder recovering device of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
Example 1
As shown in fig. 1, the talc high-concentration activated sludge process sewage treatment equipment comprises a biochemical tank 1, a mixing reaction tank 2 and a sedimentation tank 3 which are sequentially communicated, wherein a talc and flocculant adding system 4 is arranged on the mixing reaction tank 2; the sedimentation tank 3 is provided with a sludge return pipeline communicated with the biochemical tank 1 and a residual sludge discharge pipeline.
The invention uses talcum powder as the weighting material of activated sludge. The mixed liquid from the biochemical tank 1 firstly enters a mixing reaction tank 2, talcum powder and a flocculating agent are added into the mixed liquid by a talcum powder and flocculating agent adding system 4, and form flocs with good settling property together with activated sludge, then the flocs enter a sedimentation tank 3 for mud-water separation, clear water is discharged, sludge flows back to the biochemical tank 1, residual sludge is discharged, and only a small amount of talcum powder discharged along with the residual sludge needs to be supplemented.
Example 2
On the basis of embodiment 1, the talc powder high-concentration activated sludge process sewage treatment equipment further comprises a talc powder recovery device, as shown in fig. 2, and comprises a sludge storage tank 5, wherein a stirring device 6 is arranged in the sludge storage tank 5, the sludge storage tank 5 is communicated with the residual sludge discharge pipeline of the sedimentation tank 3, a talc powder recovery outlet is arranged at the bottom of the sludge storage tank 5, and a sludge discharge port is arranged at the upper part of the sludge storage tank.
The corresponding talcum powder recovery step comprises 4 steps of mud feeding, stirring, settling and mud discharging, and the method comprises the following steps of:
and 3, precipitation: stopping stirring, beginning precipitation, and depositing at a faster speed due to the fact that the specific gravity of the talcum powder is greater than that of the activated sludge, wherein the talcum powder is firstly deposited at the bottom of the sludge storage pool 5, and the activated sludge is deposited on the talcum powder;
Example 3
Based on the embodiment 1, a high-efficiency biochemical treatment process is adopted.
The biochemical pool is divided into an anoxic section and an aerobic section which respectively account for 1/2.
The aerobic section is divided into an aerobic front section and an aerobic rear section which respectively account for 1/2.
The aerobic front section runs with low dissolved oxygen, and the dissolved oxygen is controlled to be about 1mg/L, so as to achieve strong synchronous nitrification and denitrification effect.
The high-efficiency biochemical treatment method can obtain more excellent treatment effect than that of a conventional sludge concentration treatment facility, for example, the treatment facility configured according to the first-level B effluent requirement can meet the first-level A effluent requirement, and the first-level A facility can meet the quasi-IV effluent requirement.
The high-efficiency biochemical treatment method operates under the condition of low dissolved oxygen, and is low-carbon and energy-saving.
Claims (6)
1. The wastewater treatment equipment adopting the talcum powder high-concentration activated sludge process is characterized by comprising a biochemical tank (1), a mixed reaction tank (2) and a sedimentation tank (3) which are sequentially communicated, wherein a talcum powder and flocculant adding system (4) is arranged on the mixed reaction tank (2); the sedimentation tank (3) is provided with a sludge return pipeline which is communicated with the biochemical tank (1) and is also provided with a residual sludge discharge pipeline.
2. The talc high concentration activated sludge process sewage treatment apparatus as defined in claim 1, further comprising a talc recovery device comprising a sludge storage tank (5), wherein a stirring device (6) is arranged in the sludge storage tank (5), the sludge storage tank (5) is communicated with the residual sludge discharge pipeline of said sedimentation tank (3), a talc recovery outlet is arranged at the bottom of the sludge storage tank (5), and a sludge discharge outlet is arranged at the upper part.
3. The method for treating sewage by a talc high-concentration activated sludge process is characterized in that talc is used as a weighting substance of activated sludge and is put into a sedimentation tank (3) through a talc and flocculant adding system (4) in the device of claim 1 or 2.
4. The method for treating sewage by the talc high-concentration activated sludge process according to claim 3, wherein the concrete process is that the mixed liquor from the biochemical tank (1) firstly enters the mixing reaction tank (2), the talc and the flocculant are added into the mixed liquor by the talc and flocculant adding system (4), and form flocs with good settling property together with the activated sludge, then the flocs enter the sedimentation tank (3) for mud-water separation, clear water discharge, sludge backflow to the biochemical tank (1), residual sludge discharge, talc in the residual sludge can be recovered, and if the talc is not recovered, a small amount of talc discharged along with the residual sludge needs to be supplemented.
5. The method for treating sewage by the talc high concentration activated sludge process as claimed in claim 3, further comprising the step of talc recovery, comprising four steps of sludge feeding, stirring, settling and sludge discharging, which are operated in a sequence batch mode:
step (1), mud feeding: the residual sludge from the sedimentation tank (3) enters a sludge storage tank (5);
step (2), stirring: stopping feeding the sludge after the sludge storage tank (5) is full, and starting a stirring device (6) to intensively stir so as to separate the talcum powder from the activated sludge;
and (3) precipitation: stopping stirring, starting precipitation, and depositing at a faster speed due to the fact that the specific gravity of the talcum powder is greater than that of the activated sludge, wherein the talcum powder is firstly deposited at the bottom of the sludge storage tank (5), and the activated sludge is deposited on the activated sludge;
step (4), discharging mud: and (3) returning the talcum powder at the bottom of the sludge storage tank (5) to the biochemical tank (1) by using a sludge pump, and treating and disposing the residual sludge on which the talcum powder is separated.
6. The method for treating sewage by using talc powder high-concentration activated sludge process according to claim 3, wherein the biochemical tank is divided into an anoxic section and an aerobic section, and the aerobic section runs with low dissolved oxygen to achieve strong synchronous nitrification and denitrification effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110342183.5A CN112897820A (en) | 2021-03-30 | 2021-03-30 | Equipment and method for treating sewage by talcum powder high-concentration activated sludge process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110342183.5A CN112897820A (en) | 2021-03-30 | 2021-03-30 | Equipment and method for treating sewage by talcum powder high-concentration activated sludge process |
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| CN112897820A true CN112897820A (en) | 2021-06-04 |
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| CN202110342183.5A Pending CN112897820A (en) | 2021-03-30 | 2021-03-30 | Equipment and method for treating sewage by talcum powder high-concentration activated sludge process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114262050A (en) * | 2021-11-23 | 2022-04-01 | 同济大学 | Biological denitration method for interflow treatment |
| CN115259356A (en) * | 2022-07-22 | 2022-11-01 | 三亚易可霖环保科技有限公司 | Improved talcum powder high-concentration activated sludge process sewage treatment equipment and method thereof |
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Application publication date: 20210604 |