CN110776161A - Wastewater treatment system and process thereof - Google Patents
Wastewater treatment system and process thereof Download PDFInfo
- Publication number
- CN110776161A CN110776161A CN201911246528.6A CN201911246528A CN110776161A CN 110776161 A CN110776161 A CN 110776161A CN 201911246528 A CN201911246528 A CN 201911246528A CN 110776161 A CN110776161 A CN 110776161A
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- Prior art keywords
- wastewater
- treatment
- oil
- water
- tank
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- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 23
- 239000002351 wastewater Substances 0.000 claims abstract description 58
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 238000011282 treatment Methods 0.000 claims abstract description 16
- 238000001914 filtration Methods 0.000 claims abstract description 14
- 238000000926 separation method Methods 0.000 claims abstract description 14
- 239000002245 particle Substances 0.000 claims abstract description 13
- 230000001376 precipitating effect Effects 0.000 claims abstract description 11
- 239000000701 coagulant Substances 0.000 claims abstract description 10
- 239000000126 substance Substances 0.000 claims abstract description 6
- 239000000084 colloidal system Substances 0.000 claims abstract description 5
- 239000010865 sewage Substances 0.000 claims description 13
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 239000004519 grease Substances 0.000 claims description 8
- 238000001556 precipitation Methods 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 238000004062 sedimentation Methods 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 4
- 238000005188 flotation Methods 0.000 claims description 4
- 239000002585 base Substances 0.000 claims description 3
- 229910003480 inorganic solid Inorganic materials 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000007791 liquid phase Substances 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 3
- 239000010802 sludge Substances 0.000 claims description 3
- 239000007790 solid phase Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 238000011221 initial treatment Methods 0.000 abstract description 2
- 238000012216 screening Methods 0.000 abstract description 2
- 235000013305 food Nutrition 0.000 description 4
- 241001465754 Metazoa Species 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- 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
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
-
- 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
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- 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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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)
- Physical Water Treatments (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a wastewater treatment system and a process thereof, relates to the technical field of wastewater treatment, and particularly relates to a wastewater treatment system and a process thereof, wherein oil in wastewater is skimmed by an oil-water separator, and the removal rate of floating oil by the oil-water separator can reach more than 90%; in the invention, a chemical coagulant or coagulant aid is added into the floatation tank to improve the removal rate of emulsified oil and colloid suspended particles in the wastewater, and the HRT of the floatation tank for 30min can remove more than 90% of the oil and 40-80% of BOD5 and SS; the invention comprises the steps of screening, skimming, adjusting, precipitating, air floating, centrifugal separation, filtering and the like, wherein the first five processes are mainly used for pretreatment or primary treatment, and the last two processes are mainly used for advanced treatment, thereby effectively improving the wastewater treatment effect.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a wastewater treatment system and a wastewater treatment process.
Background
Because food factories have wide raw materials and various types, the produced waste water has great difference in water quality and great water amount. The main pollutants in the food wastewater comprise solid materials, grease, protein, starch, colloidal substances, acid, alkali, salt, pathogenic bacteria and the like, so that the water body is eutrophicated to cause death of aquatic animals and fishes, and organic matters deposited at the bottom of the water body generate odor to pollute the environment.
The prior food industry wastewater treatment system has poor grease removal effect, incomplete removal of suspended particles and complex process.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a wastewater treatment system and a process thereof, and solves the problems of poor grease removal effect, incomplete suspended particle removal and complex process in the conventional food industry wastewater treatment system.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: a waste water treating system is composed of grate, oil-water separator, regulating pool, settling pool, filter press, air floating pool, sewage separator and sewage microfilter.
A wastewater treatment process comprises the following steps:
step 1: primary filtering of wastewater;
step 2: skimming oil and water;
and step 3: adjusting acid and alkali;
and 4, step 4: precipitating the wastewater;
and 5: removing suspended particles;
step 6: carrying out centrifugal separation;
and 7: and (5) filtering.
The step 1: the waste water is primarily filtered, a grid with the aperture of 10-40 meshes is adopted to filter the waste water, coarse dispersed suspended solid matters are separated from the waste water, and a water pump and subsequent treatment equipment are protected.
The step 2: and (4) skimming oil and water, namely skimming grease in the wastewater through an oil-water separator.
The step 3: and (3) acid-base regulation, namely regulating the water quality and the water quantity of the wastewater through a regulating tank, wherein the regulating time is generally 6-24 h.
The step 4: and (3) precipitating the wastewater, namely precipitating the wastewater through a precipitation tank to remove inorganic solids and organic solids in the original wastewater and separate a solid phase and a liquid phase in a biological treatment process, wherein the precipitation time is 1.5-2 h.
The step 4: after the wastewater is precipitated, conveying the sludge in the sedimentation tank to a filter press for solid-liquid separation.
The step 5: and (3) removing suspended particles, namely adding a chemical coagulant or coagulant aid into the air flotation tank to improve the removal rate of emulsified oil and colloid suspended particles in the wastewater.
The step 6: and (4) performing centrifugal separation, namely performing centrifugal separation on the wastewater through a sewage separator.
The step 7: and (4) filtering, namely filtering the wastewater by using a sewage micro-filter, and recycling the filtered water.
(III) advantageous effects
The invention provides a wastewater treatment system and a process thereof. The method has the following beneficial effects:
1. in the invention, the oil-water separator is used for skimming the grease in the wastewater, and the removal rate of the oil-water separator to the floating grease can reach more than 90%;
2. in the invention, a chemical coagulant or coagulant aid is added into the air floatation tank, so that the removal rate of emulsified oil and colloid suspended particles in the wastewater is improved, and the air floatation tank HRT can remove more than 90% of oil and 40-80% of BOD5 and SS for 30 min;
3. the invention comprises the steps of screening, skimming, adjusting, precipitating, air floating, centrifugal separation, filtering and the like, wherein the first five processes are mainly used for pretreatment or primary treatment, and the last two processes are mainly used for advanced treatment, thereby effectively improving the wastewater treatment effect, and the process is simple and the wastewater treatment cost is low.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
FIG. 2 is a flow chart of the wastewater treatment process of the present invention.
In the figure: 1 grating, 2 oil-water separators, 3 adjusting tanks, 4 settling tanks, 5 filter presses, 6 air flotation tanks, 7 sewage separators and 8 sewage micro-filters.
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.
Example 1
As shown in fig. 1-2, the present invention provides a technical solution: a wastewater treatment system comprises a grid 1, an oil-water separator 2, a regulating tank 3, a sedimentation tank 4, a filter press 5, an air flotation tank 6, a sewage separator 7 and a sewage micro-filter 8.
Example 2
A wastewater treatment process comprises the following steps:
step 1: primary filtering of wastewater;
step 2: skimming oil and water;
and step 3: adjusting acid and alkali;
and 4, step 4: precipitating the wastewater;
and 5: removing suspended particles;
step 6: carrying out centrifugal separation;
and 7: and (5) filtering.
The step 1: the wastewater is primarily filtered, a grid 1 with the aperture of 10-40 meshes is adopted to filter the wastewater, coarse dispersed suspended solids are separated from the wastewater, and a water pump and subsequent treatment equipment are protected.
The step 2: and (3) skimming oil and water, namely skimming grease in the wastewater through an oil-water separator 2.
The step 3: and (4) acid-base regulation, namely regulating the water quality and the water quantity of the wastewater through a regulating tank 3, wherein the regulating time is generally 6-24 h.
The step 4: and (3) precipitating the wastewater, namely precipitating the wastewater through a precipitation tank 4 to remove inorganic solids and organic solids in the original wastewater and separate solid phase and liquid phase in a biological treatment process, wherein the precipitation time is 1.5-2 h.
The step 4: after the wastewater is precipitated, the sludge in the sedimentation tank 4 is conveyed to a filter press 5 for solid-liquid separation.
The step 5: and (3) removing suspended particles, namely adding a chemical coagulant or coagulant aid into the air floatation tank 6 to improve the removal rate of emulsified oil and colloid suspended particles in the wastewater.
The step 6: and (4) centrifugal separation, namely, centrifugal separation is carried out on the wastewater through a wastewater separator 7.
The step 7: filtering, filtering the wastewater by a sewage micro-filter 8, and recycling the filtered water.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A wastewater treatment system, characterized by: the wastewater treatment system comprises a grid (1), an oil-water separator (2), a regulating tank (3), a sedimentation tank (4), a filter press (5), an air flotation tank (6), a sewage separator (7) and a sewage micro-filter (8).
2. A wastewater treatment process is characterized in that: the wastewater treatment process comprises the following steps:
step 1: primary filtering of wastewater;
step 2: skimming oil and water;
and step 3: adjusting acid and alkali;
and 4, step 4: precipitating the wastewater;
and 5: removing suspended particles;
step 6: carrying out centrifugal separation;
and 7: and (5) filtering.
3. A process for the treatment of wastewater according to claim 2, characterized in that: the step 1: the wastewater is primarily filtered, a grid (1) with the aperture of 10-40 meshes is adopted to filter the wastewater, coarse dispersed suspended solids are separated from the wastewater, and a water pump and subsequent treatment equipment are protected.
4. A process for the treatment of wastewater according to claim 2, characterized in that: the step 2: oil and water are skimmed, and grease in the wastewater is skimmed through an oil-water separator (2).
5. A process for the treatment of wastewater according to claim 2, characterized in that: the step 3: acid-base regulation, namely regulating the water quality and the water quantity of the wastewater through a regulating tank (3), wherein the regulating time is generally 6-24 h.
6. A process for the treatment of wastewater according to claim 2, characterized in that: the step 4: and (3) precipitating the wastewater, namely precipitating the wastewater through a precipitation tank (4) to remove inorganic solids and organic solids in the original wastewater and separate solid phase and liquid phase in a biological treatment process, wherein the precipitation time is 1.5-2 h.
7. A process for the treatment of wastewater according to claim 2, characterized in that: the step 4: after the wastewater is precipitated, the sludge in the sedimentation tank (4) is conveyed to a filter press (5) for solid-liquid separation.
8. A process for the treatment of wastewater according to claim 2, characterized in that: the step 5: and (3) removing suspended particles, namely adding a chemical coagulant or coagulant aid into the air floatation tank (6) to improve the removal rate of emulsified oil and colloid suspended particles in the wastewater.
9. A process for the treatment of wastewater according to claim 2, characterized in that: the step 6: and (4) performing centrifugal separation, namely performing centrifugal separation on the wastewater through a sewage separator (7).
10. A process for the treatment of wastewater according to claim 2, characterized in that: the step 7: filtering, namely filtering the wastewater by a sewage micro-filter (8), and recycling the filtered water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911246528.6A CN110776161A (en) | 2019-12-07 | 2019-12-07 | Wastewater treatment system and process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911246528.6A CN110776161A (en) | 2019-12-07 | 2019-12-07 | Wastewater treatment system and process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110776161A true CN110776161A (en) | 2020-02-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911246528.6A Pending CN110776161A (en) | 2019-12-07 | 2019-12-07 | Wastewater treatment system and process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110776161A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102311186A (en) * | 2011-04-25 | 2012-01-11 | 丁云法 | Circulative reclamation processing system and processing technology of weaving jet wastewater |
| CN104045178A (en) * | 2013-03-12 | 2014-09-17 | 绍兴深水环保设备有限公司 | Hydraulic-loom wastewater treatment recycling method |
| CN203959951U (en) * | 2014-04-25 | 2014-11-26 | 正业包装（中山）有限公司 | A kind of printing-ink wastewater treatment and recovery system |
| CN105152395A (en) * | 2015-08-25 | 2015-12-16 | 太仓旺泰净化设备有限公司 | Advanced treatment process for paper making waste water |
-
2019
- 2019-12-07 CN CN201911246528.6A patent/CN110776161A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102311186A (en) * | 2011-04-25 | 2012-01-11 | 丁云法 | Circulative reclamation processing system and processing technology of weaving jet wastewater |
| CN104045178A (en) * | 2013-03-12 | 2014-09-17 | 绍兴深水环保设备有限公司 | Hydraulic-loom wastewater treatment recycling method |
| CN203959951U (en) * | 2014-04-25 | 2014-11-26 | 正业包装（中山）有限公司 | A kind of printing-ink wastewater treatment and recovery system |
| CN105152395A (en) * | 2015-08-25 | 2015-12-16 | 太仓旺泰净化设备有限公司 | Advanced treatment process for paper making waste water |
Non-Patent Citations (1)
| Title |
|---|
| 张东海;: "混凝/隔油/气浮/ABR用于某卤制废水处理工程改扩建", 中国给水排水, no. 20 * |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20200211 |