NL2037232B1 - Double-cycle treatment system and method for seasonal wastewater - Google Patents
Double-cycle treatment system and method for seasonal wastewater Download PDFInfo
- Publication number
- NL2037232B1 NL2037232B1 NL2037232A NL2037232A NL2037232B1 NL 2037232 B1 NL2037232 B1 NL 2037232B1 NL 2037232 A NL2037232 A NL 2037232A NL 2037232 A NL2037232 A NL 2037232A NL 2037232 B1 NL2037232 B1 NL 2037232B1
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- Prior art keywords
- tank
- activated sludge
- sludge
- water
- phosphorus removal
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- 239000002351 wastewater Substances 0.000 title claims abstract description 26
- 230000001932 seasonal effect Effects 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title description 4
- 239000010802 sludge Substances 0.000 claims abstract description 112
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 92
- 238000010992 reflux Methods 0.000 claims abstract description 47
- 239000006228 supernatant Substances 0.000 claims abstract description 21
- 239000013049 sediment Substances 0.000 claims abstract description 19
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 26
- 229910052698 phosphorus Inorganic materials 0.000 claims description 26
- 239000011574 phosphorus Substances 0.000 claims description 26
- 238000004519 manufacturing process Methods 0.000 claims description 22
- 239000000126 substance Substances 0.000 claims description 19
- 238000004062 sedimentation Methods 0.000 claims description 5
- 238000005345 coagulation Methods 0.000 claims description 4
- 230000015271 coagulation Effects 0.000 claims description 4
- 239000005416 organic matter Substances 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 238000004065 wastewater treatment Methods 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000005446 dissolved organic matter Substances 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- 238000003908 quality control method Methods 0.000 claims 6
- 239000000203 mixture Substances 0.000 claims 4
- 230000001105 regulatory effect Effects 0.000 abstract description 53
- 238000011084 recovery Methods 0.000 abstract description 26
- 239000002131 composite material Substances 0.000 abstract description 25
- 238000004891 communication Methods 0.000 abstract description 14
- 239000010865 sewage Substances 0.000 description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 238000005276 aerator Methods 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 239000013618 particulate matter Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 241000219095 Vitis Species 0.000 description 2
- 235000009754 Vitis X bourquina Nutrition 0.000 description 2
- 235000012333 Vitis X labruscana Nutrition 0.000 description 2
- 235000014787 Vitis vinifera Nutrition 0.000 description 2
- 238000005273 aeration Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000003306 harvesting Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229920001592 potato starch Polymers 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 241000219094 Vitaceae Species 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000013124 brewing process Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 235000021021 grapes Nutrition 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000011144 upstream manufacturing 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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1205—Particular type of activated sludge processes
- C02F3/1215—Combinations of activated sludge treatment with precipitation, flocculation, coagulation and separation of phosphates
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/32—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/32—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters
- C02F2103/325—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters from processes relating to the production of wine products
-
- 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
- C02F3/006—Regulation methods for biological treatment
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The present invention provides a double-cycle treatment system for seasonal wastewater. A water quantity and quality regulating tank is arranged between a sediment tank and an aerobic biofilm and activated sludge composite biochemical tank, and a water outlet of the water quantity and quality regulating tank is in communication with a water inlet of the aerobic biofllm and activated sludge composite biochemical tank. A first reflux device is arranged between the water quantity and quality regulating tank and an activated sludge settling recovery tank, and the first reflux device conveys all or part of supernatant in the activated sludge settling recovery tank to the water quantity and quality regulating tank for cycle treatment. Sludge in the activated sludge settling recovery tank returns to the aerobic biofllm and activated sludge composite biochemical tank by means of a sludge reflux device.
Description
DOUBLE-CYCLE TREATMENT SYSTEM AND METHOD FOR SEASONAL
WASTEWATER
[01] The present invention relates to the technical field of sewage treatment, and in particular to a double-cycle treatment system and method for seasonal wastewater.
[02] With rapid improvement of online continuous monitoring capability of pollution sources, industrial wastewater discharge formed by China’s huge industrial volume has attracted increasing public attention. Seasonal intermittent sewage discharge sources formed due to raw material restrictions of an agricultural and sideline food processing industry, etc. have recently been added into a discharge supervision and discharge permit management system in an accelerated manner, and requirements for stable compliance of seasonal intermittent sewage have been rapidly increased.
[03] The eastern foot of Helan Mountain is located between the alluvial plain of the
Yellow River in Ningxia and the alluvial fan of Helan Mountain, is adjacent to the towering Helan Mountain Range in the west, near upstream of the Yellow River in the east and is next to the ancient city Yinchuan in the north. The total area is 200000 hectares. The eastern foot of Helan Mountain has sufficient sunshine with 3000 hours of sunshine throughout the year. Sandy soil on the Gobi Desert is rich in minerals. The eastern foot of Helan Mountain lies at latitude 37 degrees to 39 degrees north, which is the best zone for planting grapes. The altitude is 1000 meters to 1500 meters, which is suitable for grape growth. Annual rainfall does not exceed 200 mm. The sunshine, soil, moisture, altitude and latitude of the eastern foot of Helan Mountain are conducive to grape planting. Therefore, many wineries are built at the eastern foot of Helan Mountain.
Wastewater will be produced in a wine brewing process. Time during which the wastewater 1s produced is from September to November every year, which is a harvest and pressing season. Wastewater treatment facilities of the wineries only have enough wastewater sources in the second half of the year. Similarly, potato starch processing in
Xij1, Ningxia also has the same characteristics, harvesting and processing are performed in the second half of the year, and production is not performed in the first half of the year. Production of the wastewater has typical seasonal characteristics.
[04] In an existing winery and potato starch wastewater biochemical treatment project, the following technical problems exist: 1, the seasonal wastewater quantity is large, a pollutant concentration is high, a wastewater treatment system load is high, and the water quality of effluent is difficult to stably satisfy standards in a sewage production season; and 2, the wastewater quantity is small, an organic matter concentration is low, a carbon source of the wastewater treatment system is insufficient, and sludge is likely to age in a non-sewage-production season.
[05] In view of this, a double-cycle treatment system for seasonal wastewater is disclosed in the present invention so as to solve the technical problems that the water quality of treated water of the seasonal wastewater is difficult to stably satisfy discharge standards in a sewage production season and sludge is likely to be aged in a non-sewage- production season.
[06] The double-cycle treatment system for seasonal wastewater includes a sediment tank, a water quantity and quality regulating tank, a first reflux device, an aerobic biofilm and activated sludge composite biochemical tank, an activated sludge settling recovery tank, a sludge reflux device, a gravel filter and a chemical phosphorus removal tank. A water outlet of the water quantity and quality regulating tank is in communication with a water inlet of the aerobic biofilm and activated sludge composite biochemical tank, and a water inlet of the water quantity and quality regulating tank is higher than the water outlet of the water quantity and quality regulating tank. A water outlet of the aerobic biofilm and activated sludge composite biochemical tank is in communication with a water inlet of the activated sludge settling recovery tank, and a water outlet of the activated sludge settling recovery tank 1s in communication with a water inlet of the gravel filter. The gravel filter filters supernatant discharged from the activated sludge settling recovery tank, and then discharges the filtered supernatant to the chemical phosphorus removal tank for phosphorus removal. The first reflux device is in communication with the activated sludge settling recovery tank and the water quantity and quality regulating tank, and is used for washing up bottom sediment of the water quantity and quality regulating tank by utilizing the supernatant in the activated sludge settling recovery tank in a non-production season, and changing solid organic matter in the bottom sediment into dissolved organic matter. The sludge reflux device is in ie communication with the aerobic biofilm and activated sludge composite biochemical tank and the activated sludge settling recovery tank, and is used for performing sludge reflux in a production season. The sludge reflux device includes a sludge reflux pump and a sludge reflux pipeline.
[07] Inthe double-cycle treatment system for seasonal wastewater. The water quantity and quality regulating tank is arranged between the sediment tank and the aerobic biofilm and activated sludge composite biochemical tank, and the water outlet of the water quantity and quality regulating tank is in communication with the water inlet of the aerobic biofilm and activated sludge composite biochemical tank. The first reflux device is arranged between the water quantity and quality regulating tank and the activated sludge settling recovery tank, and the first reflux device conveys all of supernatant in the activated sludge settling recovery tank to the water quantity and quality regulating tank for cycle treatment in response to a first starting operation in a non-sewage-production season. Sediment in a first regulating tank is washed up by means of reflux water, thereby converting a solid carbon source into a dissolved state to supplement a carbon source of the wastewater in the non-sewage-production season. Or in response to a third starting operation, the first reflux device conveys part of the supernatant in the activated sludge settling recovery tank to the water supply quantity and water quality regulating tank for cycle treatment. Sludge reflux is performed by using the sludge reflux device in a sewage production season. Phosphorus removal is performed on the supernatant discharged from the gravel filter tank by using the chemical phosphorus removal tank, so as to ensure that the water quality satisfies discharge standards, thereby ensuring that the water quality of the treated water of the seasonal wastewater satisfies the standards stably in the sewage production season, and ensuring sludge activity in the non-sewage-production season.
[08] FIG. 1is a schematic diagram for module connection of a double-cycle treatment system for seasonal wastewater provided by the present invention; and
[09] FIG. 21s a schematic structural diagram of a water quantity and quality regulating tank in FIG. 1.
[10] In the figures: double-cycle treatment system 10 for seasonal wastewater, sediment tank 20, water quantity and quality regulating tank 30, first regulating tank 31, first sludge tank 310, second regulating tank 32, second sludge tank 320, third regulating tank 33, third sludge tank 330, first reflux device 40, aerobic biofilm and activated sludge composite biochemical tank 50, activated sludge settling recovery tank 60, gravel filter 70, chemical phosphorus removal tank 80, sludge reflux device 90, a hydraulic circulating pump 100 and a suspended chain aerator 101.
[11] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in combination with the particular examples of the present invention and the accompanying drawings.
[12] As shown in FIG. 1, the present invention provides a double-cycle treatment system 10 for seasonal wastewater. The system includes a sediment tank 20, a water quantity and quality regulating tank 30, a first reflux device 40, an aerobic biofilm and activated sludge composite biochemical tank 50, an activated sludge settling recovery tank 60, a sludge reflux device 90, a gravel filter 70 and a chemical phosphorus removal tank 80. A water outlet of the water quantity and quality regulating tank 30 is in communication with a water inlet of the aerobic biofilm and activated sludge composite biochemical tank 50, and a water inlet of the water quantity and quality regulating tank 30 is higher than the water outlet of the water quantity and quality regulating tank 30. A water outlet of the aerobic biofilm and activated sludge composite biochemical tank 50 is in communication with a water inlet of the activated sludge settling recovery tank 60, and a water outlet of the activated sludge settling recovery tank 60 is in communication with a water inlet of the gravel filter 70. Supernatant of the aerobic biofilm and activated sludge composite biochemical tank 50 1s discharged into the gravel filter 70, and sludge settled at a bottom flows back to the aerobic biofilm and activated sludge composite biochemical tank 50 by means of the sludge reflux device 90. The gravel filter 70 discharges the filtered supernatant to the chemical phosphorus removal tank 80 for phosphorus removal. The first reflux device 40 is connected to the activated sludge settling recovery tank 60 and the water quantity and quality regulating tank 30. The first reflux device 40 conveys all of the supernatant in the activated sludge settling recovery tank 60 to the water supply quantity and quality regulating tank 30 for cycle treatment in response to a first starting operation. The first reflux device 40 conveys part of the supernatant in the activated sludge settling recovery tank 60 to the water supply quantity and quality regulating tank 30 for cycle treatment in response to a third starting operation.
[13] The double-cycle treatment system 10 for seasonal wastewater further includes an ultraviolet disinfection device (not shown in the figure) which is arranged at a water outlet of the chemical phosphorus removal tank 80 to sterilize water discharged from the chemical phosphorus removal tank 80 by using the ultraviolet disinfection device.
[14] The double-cycle treatment system 10 for seasonal wastewater includes a sludge reflux device 90. The sludge reflux device 90 is connected to the activated sludge settling recovery tank 60 and the aerobic biofilm and activated sludge composite biochemical tank 50. The sludge reflux device 90 returns sludge settled at a bottom of the activated sludge settling recovery tank 60 to the aerobic biofilm and activated sludge composite biochemical tank 50 in response to a second starting operation. The sludge reflux device includes a sludge reflux pump and a sludge reflux pipeline, and a sludge reflux ratio is 10%-200%.
[15] In a non-sewage-production season (non-production season), when the sewage quantity is low and a pollutant concentration is low, there is one cycle:
[16] a water outlet of the first reflux device 40 is in communication with the water inlet of a first regulating tank 31, and the first reflux device 40 is started. In response to the first starting operation, the first reflux device 40 conveys all of the supernatant in the activated sludge settling recovery tank 60 to the first regulating tank 31 of the water quantity and quality regulating tank 30 for cycle treatment. Sediment in the first regulating tank 31 is washed up by using reflux water, thereby converting a solid carbon source into a dissolved state to supplement a carbon source of wastewater in the non- sewage-production season.
[17] Or the water outlet of the first reflux device 40 is in communication with a water inlet of a third regulating tank 33. In response to the third starting operation, the first reflux device 40 conveys part of the supernatant in the activated sludge settling recovery tank 60 to the third regulating tank 33 of the water quantity and quality regulating tank for cycle treatment so as to ensure that the water quality satisfies discharge standards. 30 [18] In a sewage production season (production season), when the sewage quantity 1s high and the pollutant concentration is high, there is the other cycle:
[19] A working process of the double-cycle treatment system for seasonal wastewater provided by the present invention is as follows:
[20] The water quantity and quality regulating tank 30 is arranged between the sediment tank 20 and the aerobic biofilm and activated sludge composite biochemical tank 50, and the water outlet of the water quantity and quality regulating tank 30 is in communication with the water inlet of the aerobic biofilm and activated sludge composite biochemical tank 50. A movable and detachable screen is arranged in the sediment tank 20, and a hole diameter of the screen is greater than 1 cm and smaller than 3 cm to remove large particulate matter. A floating ball liquid level meter is arranged in the sediment tank to control an operation of a lifting pump by means of a floating ball liquid level. As shown in FIG. 2, the water quantity and quality regulating tank 30 includes a first regulating tank 31, a second regulating tank 32 and a third regulating tank 33 which are connected in sequence. A bottom of the first regulating tank 31 1s provided with a slope of 15%o, and a first sludge tank 310 is arranged at a bottom of a water output side. The first sludge tank 310 has a width of 50 cm and a height of 20 cm. The first sludge tank 3 10 is used for collecting large particulate matter settled down, and anaerobic fermentation is performed in the first sludge tank 310. A hydraulic circulating pump 100 is mounted in the first sludge tank 310 for hydraulic cycle in the non-production season to promote mixing and anaerobic decomposition of the sediment. Depths of the second regulating tank 32 and the third regulating tank 33 are two thirds of a depth of the first regulating tank 31, such that suspended particles from large to small can be settled by using the first regulating tank 31, the second regulating tank 32 and the third regulating tank 33. Moreover, a second sludge tank 320 and a third sludge tank 330 are also arranged at bottoms of water output sides of the second regulating tank 32 and the third regulating tank 33 respectively. A suspended chain aerator 101 is arranged in the third regulating tank 33, such that when the water quality concentration is high in the production season, the suspended chain aerator 101 is utilized for aeration to promote degradation of organic matter in the water. Water outlets of the first regulation tank 31, the second regulation tank 32 and the third regulation tank 33 are gradually lowered, and the water outlet of the third regulation tank 33 is in communication with the water inlet of the aerobic biofilm and activated sludge composite biochemical tank 50.
[21] The particulate matter in the wastewater is removed by means of gravity sedimentation and by using the sediment tank 20, and the supernatant in the sediment tank 20 is conveyed to the water quantity and quality regulating tank 30 by means of the lifting pump.
[22] The supernatant in the sediment tank 20 is accommodated and subjected to graded settling by using the water quantity and quality regulating tank 30, and the sewage precipitated again is conveyed to the aerobic biofilm and activated sludge composite biochemical tank 50 by means of flow by gravity.
[23] Activated sludge is arranged in the aerobic biofilm and activated sludge composite biochemical tank 50, and sewage entering the aerobic biofilm and activated sludge composite biochemical tank 50 is purified by means of aeration and oxygen supply.
[24] The activated sludge settling recovery tank 60 is used for performing sludge and water separation on the sewage supplied from the aerobic biofilm and activated sludge composite biochemical tank 50. The supernatant is discharged into the gravel filter 70, and sludge settled at the bottom is returned to the aerobic biofilm and activated sludge composite biochemical tank 50 by means of the sludge reflux device 90.
[25] The supernatant discharged from the activated sludge settling recovery tank 60 is filtered by using the gravel filter 70, and the filtered supernatant is discharged to the chemical phosphorus removal tank 80 for phosphorus removal.
[26] The chemical phosphorus removal tank 80 includes a phosphorus removal agent adding system, a stirring device, a chemical phosphorus removal tank body and a sludge discharge pipe, and the chemical phosphorus removal tank body is an efficient coagulation sedimentation tank or a magnetic coagulation sedimentation tank.
[27] By adding a chemical phosphorus removal agent, total phosphorus in the sewage is removed, chemical sludge generated is discharged regularly by means of the sludge discharge pipe, and effluent subjected to the sludge and water separation satisfies the discharge standards and is discharged.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL2037232A NL2037232B1 (en) | 2024-03-12 | 2024-03-12 | Double-cycle treatment system and method for seasonal wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL2037232A NL2037232B1 (en) | 2024-03-12 | 2024-03-12 | Double-cycle treatment system and method for seasonal wastewater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NL2037232A NL2037232A (en) | 2024-04-03 |
| NL2037232B1 true NL2037232B1 (en) | 2024-10-10 |
Family
ID=90623402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL2037232A NL2037232B1 (en) | 2024-03-12 | 2024-03-12 | Double-cycle treatment system and method for seasonal wastewater |
Country Status (1)
| Country | Link |
|---|---|
| NL (1) | NL2037232B1 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115893745B (en) * | 2022-12-05 | 2025-03-21 | 宁夏大学 | Seasonal wastewater double circulation treatment system and method |
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2024
- 2024-03-12 NL NL2037232A patent/NL2037232B1/en active
Also Published As
| Publication number | Publication date |
|---|---|
| NL2037232A (en) | 2024-04-03 |
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