CN112279464A - Integrated sewage treatment equipment and treatment process - Google Patents
Integrated sewage treatment equipment and treatment process Download PDFInfo
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- CN112279464A CN112279464A CN202011129713.XA CN202011129713A CN112279464A CN 112279464 A CN112279464 A CN 112279464A CN 202011129713 A CN202011129713 A CN 202011129713A CN 112279464 A CN112279464 A CN 112279464A
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- backwashing
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- filter
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- 239000010865 sewage Substances 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000008569 process Effects 0.000 title claims abstract description 16
- 238000011001 backwashing Methods 0.000 claims abstract description 54
- 239000000463 material Substances 0.000 claims abstract description 19
- 239000006004 Quartz sand Substances 0.000 claims abstract description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000001914 filtration Methods 0.000 claims abstract description 13
- 239000002131 composite material Substances 0.000 claims abstract description 10
- 239000002245 particle Substances 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 64
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 24
- 239000010802 sludge Substances 0.000 claims description 17
- 238000010992 reflux Methods 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 13
- 229910052757 nitrogen Inorganic materials 0.000 claims description 11
- 238000004062 sedimentation Methods 0.000 claims description 10
- 239000007789 gas Substances 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 239000003814 drug Substances 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000001546 nitrifying effect Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims 1
- 230000010354 integration Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 9
- 230000002708 enhancing effect Effects 0.000 abstract 2
- 239000003344 environmental pollutant Substances 0.000 description 5
- 231100000719 pollutant Toxicity 0.000 description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 208000034699 Vitreous floaters Diseases 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000002354 daily effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010841 municipal wastewater Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 238000003911 water pollution 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
- C02F1/001—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
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- 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
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
-
- 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
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)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The integrated sewage treatment equipment comprises a filter material composite layer, wherein the filter material composite layer is composed of three cobble layers and two quartz sand layers which are stacked from bottom to top, the particle sizes of the cobble layers are phi 16-25 mm, phi 8-16 mm and phi 4-8 mm from bottom to top respectively, and the particle sizes of the quartz sand layers are phi 2-4 mm and phi 1-2 mm from bottom to top respectively. The equipment optimizes the backwashing operation of the filter tank, thereby enhancing the filtering capacity of the filter tank, and simultaneously enhancing the denitrification and denitrogenation capacity of the filter tank through nitrogen-driving backwashing. Simultaneously, the sewage treatment process is provided, the backwashing operation process is optimized, the nitrogen-removing backwashing step is added, the filtering capacity of the filter is rapidly recovered, and the denitrification nitrogen-removing effect and efficiency are enhanced.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to integrated sewage treatment equipment and a treatment process.
Background
The increasing water pollution has made a great threat to human survival safety, and has become a great obstacle to human health, economic and social sustainable development. Therefore a series of environmental protection measures are brought forward, wherein the integrated sewage treatment equipment rapidly enters the public sight line due to the characteristics of simple operation, low operation cost and the like, and the equipment comprises an anaerobic tank, an anoxic tank, an aerobic tank, an inclined tube sedimentation tank and other treatment units, and can effectively remove pollutants such as COD, BOD, ammonia nitrogen, total phosphorus, total nitrogen and the like in the sewage.
In the existing integrated sewage treatment system, due to the limitation of the treatment process and the filter material structure, the removal amount of TN (total nitrogen amount), SS (suspended solids) and the like gradually decreases along with the service time of the deep-bed filter, thereby affecting the sewage treatment effect, so that the targeted improved design is required.
Disclosure of Invention
The invention aims to provide integrated sewage treatment equipment and a treatment process which are put into use so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the integrated sewage treatment equipment comprises a filter material composite layer arranged at the bottom of a deep bed filter, wherein the filter material composite layer is composed of three layers of cobble layers and two layers of quartz sand layers which are stacked from bottom to top, the particle sizes of the cobble layers are phi 16-25 mm, phi 8-16 mm and phi 4-8 mm from bottom to top respectively, and the particle sizes of the quartz sand layers are phi 2-4 mm and phi 1-2 mm from bottom to top respectively.
Preferably, the total thickness of the quartz sand layer is not less than 1.2 m.
There is also provided a sewage treatment process using the integrated sewage treatment apparatus of claim 1 or 2, comprising the steps of,
s1, biochemical treatment of sewage:
a. sewage firstly enters an anaerobic tank through a water inlet pipe, then sequentially enters an anoxic tank and an aerobic tank through gravity flow, simultaneously activated sludge is fed and cultured into the aerobic tank, and the medicine is added to a water outlet weir at the tail end of the aerobic tank through a PAC medicine adding device;
b. then, aerating the bottom of the aerobic tank by a fan, and simultaneously refluxing a part of the gas-water mixture in the aerobic tank to the front end of the anoxic tank to realize the reflux of the nitrifying liquid;
s2, sludge-water separation treatment of sewage:
the mud water in the aerobic tank flows into the inclined tube sedimentation tank through the effluent weir to realize mud-water separation;
s3, filtering sewage suspended matters and denitrifying denitrification treatment:
and (3) conveying the sewage to the deep-bed filter tank by the inclined-tube sedimentation tank through the effluent weir, and flowing along the deep-bed filter tank from top to bottom.
S4, backwashing the filter tank:
a. stopping water inlet of the equipment, closing an electric valve and a water production pump at the inlet of a water production pump, opening a backwashing fan, and performing gas backwashing for 3 min;
b. opening an electric valve on a backwashing water pump and the backwashing water pump, simultaneously performing water washing and air washing, opening the electric valve on a backwashing water discharge pipe, and backwashing for 5 min;
c. then the backwashing fan is closed, and water backwashing is carried out for 5 min;
d. finally, closing the electric valves on the backwashing water pump and the backwashing water discharge pipe, feeding water into the equipment, and finishing backwashing of the whole filter;
s5, nitrogen removal backwashing;
a. and firstly stopping water inlet of the equipment, opening an electric valve on a backwashing water discharge pipe, starting a backwashing water pump, and continuously backwashing the filter tank for 1min once a day.
Preferably, the sludge at the bottom of the inclined tube sedimentation tank flows back to the anaerobic tank in the S3 step, and the sludge reflux ratio is 50-100%.
Preferably, the nitrification liquid reflux in the step S1 and the sludge reflux in the step S3 both adopt a gas stripping reflux mode.
The filter material composite layer is composed of three layers of cobble layers and two layers of quartz sand layers which are stacked from bottom to top, the particle sizes of the cobble layers are phi 16-25 mm, phi 8-16 mm and phi 4-8 mm from bottom to top respectively, and the particle sizes of the quartz sand layers are phi 2-4 mm and phi 1-2 mm from bottom to top respectively.
Preferably, the total thickness of the quartz sand layer is not less than 1.2 m.
The invention has the technical effects and advantages that: according to the integrated sewage treatment equipment and the treatment process, the backwashing operation in the sewage treatment process is optimized and the daily nitrogen-driving backwashing operation is added, and meanwhile, the corresponding structural improvement is carried out on the structure of the filter tank, so that the stability of floaters interception, denitrification and dephosphorization effects of the deep-bed filter tank is ensured, nitrogen deposited between filter materials is removed, the flow velocity of the filter tank is ensured, the sewage treatment effect is ensured, the effluent can reach the first-level A discharge standard in the urban pollutant discharge standard, and the practicability is high.
Drawings
FIG. 1 is a schematic structural view of a filter tank structure
In the figure: 1. a filter material composite layer; 2. a cobble layer; 3. and (5) a quartz sand layer.
Detailed Description
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, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a sewage treatment process, which comprises the following steps,
s1, biochemical treatment of sewage:
a. sewage enters an anaerobic tank through a water inlet pipe, then sequentially enters an anoxic tank and an aerobic tank through gravity flow, is added into the aerobic tank and is cultured with activated sludge, and is added into a water outlet weir at the tail end of the aerobic tank through a PAC (poly aluminum chloride) dosing device;
b. then, aerating the bottom of the aerobic tank by a fan, and simultaneously refluxing a part of the gas-water mixture in the aerobic tank to the front end of the anoxic tank to realize the reflux of the nitrifying liquid;
s2, sludge-water separation treatment of sewage:
sludge water in the aerobic tank flows into the inclined tube sedimentation tank through the effluent weir, and the sludge-water separation is preliminarily realized;
s3, filtering sewage suspended matters and denitrifying denitrification treatment:
and (3) conveying the sewage to the deep-bed filter tank by the inclined-tube sedimentation tank through the effluent weir, and flowing along the deep-bed filter tank from top to bottom.
S4, backwashing the filter tank:
a. stopping water inlet of the equipment, closing an electric valve and a water production pump at the inlet of a water production pump, opening a backwashing fan, and performing gas backwashing for 3 min;
b. opening an electric valve on a backwashing water pump and the backwashing water pump, simultaneously performing water washing and air washing, opening the electric valve on a backwashing water discharge pipe, and backwashing for 5 min;
c. then the backwashing fan is closed, and water backwashing is carried out for 5 min;
d. finally, closing the electric valves on the backwashing water pump and the backwashing water discharge pipe, feeding water into the equipment, and finishing backwashing of the whole filter;
s5, nitrogen removal backwashing;
a. and firstly stopping water inlet of the equipment, opening an electric valve on a backwashing water discharge pipe, starting a backwashing water pump, and continuously backwashing the filter tank for 1min once a day.
In sewage treatment in-process, carry out the filtering pond backwash about two days apart, operation process through optimizing the filtering pond backwash, thereby high efficiency gets rid of the plug between the filter material, guarantee that filtering pond filter effect resumes to normal level, and simultaneously, the nitrogen backwash of once driving that once every day has been increased, can get rid of adnexed nitrogen gas in the filtering pond filter material space, avoid influencing the water velocity of flow in filtering pond owing to the production of nitrogen gas, accelerate filtration efficiency, thereby the stability of the deep bed filtering pond work of reinforcing, the reinforcing is to the effect of holding back of suspended solid, strengthen the effect of denitrification denitrogenation simultaneously, thereby realize the high-efficient denitrogenation of sewage treatment, the practicality is stronger.
And S3, returning sludge at the bottom of the inclined tube sedimentation tank to the anaerobic tank, wherein the sludge return ratio is 50-100%. The activated sludge is recycled, so that the input amount of the activated sludge is saved, and the cost is saved.
And the nitrification liquid reflux in the step S1 and the sludge reflux in the step S3 both adopt a gas stripping reflux mode. When the aeration is carried out to the bottom of the aerobic tank through the fan, simultaneously, due to the blowing of compressed gas, the density of formed mixed liquid is lower than that of original liquid, the density difference forms the height change of the liquid level of liquid inside and outside the liquid lifting pipe, the mixed liquid with small density rises and is discharged along with the liquid lifting pipe, the backflow of sewage and activated sludge is realized, the arrangement of a sludge backflow pump is cancelled, the equipment installation is reduced, the control is convenient, and the failure rate is low.
The integrated sewage treatment equipment comprises a filter material composite layer 1 arranged at the bottom of the deep bed filter tank, wherein the filter material composite layer 1 is composed of three layers of cobble layers 2 and two layers of quartz sand layers 3 which are stacked from bottom to top, the particle sizes of the cobble layers 2 are phi 16-25 mm, phi 8-16 mm and phi 4-8 mm from bottom to top, and the particle sizes of the quartz sand layers 3 are phi 2-4 mm and phi 1-2 mm from bottom to top.
The total thickness of the quartz sand layer 33 is not less than 1.2 m.
The structure of the filter material of the filter is optimized, so that the concentration of suspended pollutants in the effluent can be further reduced by the interception effect of the filter material. Microorganisms among the gaps of the filter material can grow by increasing the value of the microorganisms, so that pollutants such as total nitrogen in the water body can be further degraded, and the effluent quality is good.
And the actual sewage treatment indexes are shown in the following table:
| detecting items | COD | TP | TN | ss | Ammonia nitrogen |
| Inflow water | 106 | 1.84 | 30.1 | 161 | 28.3 |
| Discharging water | 24 | 0.94 | 23.8 | 38 | 18.2 |
From the table above, the optimization of the process and the improvement of the filter material structure can be realized, the proportion of removing ammonia nitrogen and TN is 55 percent together, the removal rate of suspended matters (SS) is 76 percent, the phosphorus removal rate is 49 percent, and effective nitrogen and phosphorus removal is realized, so that the first-class A standard in discharge standards of pollutants for municipal wastewater treatment plants (GB18918-2002) is reached, and the practicability is strong.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (5)
1. The utility model provides an integration sewage treatment device, is including setting up in the filter material composite bed of deep bed filtering pond bottom, its characterized in that: the filter material composite layer is composed of three cobble layers and two quartz sand layers which are stacked from bottom to top, the particle sizes of the cobble layers are phi 16-25 mm, phi 8-16 mm and phi 4-8 mm from bottom to top respectively, and the particle sizes of the quartz sand layers are phi 2-4 mm and phi 1-2 mm from bottom to top respectively.
2. A filter material construction according to claim 1, wherein: the total thickness of the quartz sand layer is not less than 1.2 m.
3. A sewage treatment process using the integrated sewage treatment apparatus of claim 1 or 2, characterized in that: comprises the following steps of (a) carrying out,
s1, biochemical treatment of sewage:
a. sewage firstly enters an anaerobic tank through a water inlet pipe, then sequentially enters an anoxic tank and an aerobic tank through gravity flow, simultaneously activated sludge is fed and cultured into the aerobic tank, and the medicine is added to a water outlet weir at the tail end of the aerobic tank through a PAC medicine adding device;
b. then, aerating the bottom of the aerobic tank by a fan, and simultaneously refluxing a part of the gas-water mixture in the aerobic tank to the front end of the anoxic tank to realize the reflux of the nitrifying liquid;
s2, sludge-water separation treatment of sewage:
the mud water in the aerobic tank flows into the inclined tube sedimentation tank through the effluent weir to realize mud-water separation;
s3, filtering sewage suspended matters and denitrifying denitrification treatment:
and (3) conveying the sewage to the deep-bed filter tank by the inclined-tube sedimentation tank through the effluent weir, and flowing along the deep-bed filter tank from top to bottom.
S4, backwashing the filter tank:
a. stopping water inlet of the equipment, closing an electric valve and a water production pump at the inlet of a water production pump, opening a backwashing fan, and performing gas backwashing for 3 min;
b. opening an electric valve on a backwashing water pump and the backwashing water pump, simultaneously performing water washing and air washing, opening the electric valve on a backwashing water discharge pipe, and backwashing for 5 min;
c. then the backwashing fan is closed, and water backwashing is carried out for 5 min;
d. finally, closing the electric valves on the backwashing water pump and the backwashing water discharge pipe, feeding water into the equipment, and finishing backwashing of the whole filter;
s5, nitrogen removal backwashing;
a. and firstly stopping water inlet of the equipment, opening an electric valve on a backwashing water discharge pipe, starting a backwashing water pump, and continuously backwashing the filter tank for 1min once a day.
4. The self-driven nitrogen integrated sewage treatment process according to claim 1, characterized in that: and S3, returning sludge at the bottom of the inclined tube sedimentation tank to the anaerobic tank, wherein the sludge return ratio is 50-100%.
5. The self-driven nitrogen integrated sewage treatment process according to claim 2, characterized in that: and the nitrification liquid reflux in the step S1 and the sludge reflux in the step S3 both adopt a gas stripping reflux mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011129713.XA CN112279464A (en) | 2020-10-21 | 2020-10-21 | Integrated sewage treatment equipment and treatment process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011129713.XA CN112279464A (en) | 2020-10-21 | 2020-10-21 | Integrated sewage treatment equipment and treatment process |
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| CN112279464A true CN112279464A (en) | 2021-01-29 |
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|---|---|---|---|---|
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-
2020
- 2020-10-21 CN CN202011129713.XA patent/CN112279464A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102527109A (en) * | 2011-12-14 | 2012-07-04 | 盖君阳 | Novel energy-saving water treatment filter device |
| CN103214090A (en) * | 2013-05-16 | 2013-07-24 | 南京大学 | Anoxic humic filler filter tank and method for treating nitrogen containing degradation-resistant wastewater |
| CN204529617U (en) * | 2015-04-03 | 2015-08-05 | 敬志明 | A kind of efficient ecological integrated sewage treating apparatus |
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