CN211999033U - Two-stage BAF biochemical system - Google Patents
Two-stage BAF biochemical system Download PDFInfo
- Publication number
- CN211999033U CN211999033U CN202020210633.6U CN202020210633U CN211999033U CN 211999033 U CN211999033 U CN 211999033U CN 202020210633 U CN202020210633 U CN 202020210633U CN 211999033 U CN211999033 U CN 211999033U
- Authority
- CN
- China
- Prior art keywords
- water
- communicated
- pool
- baf
- region
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The utility model provides a two-stage BAF biochemical system, which comprises a two-stage BAF reactor, a water inlet pool, a circulating water pool, a water outlet pool, an aeration fan and a back flushing fan, wherein the two-stage BAF reactor comprises a nitrification area and a denitrification area which are arranged from top to bottom; the outlet of the water inlet pool is communicated with the bottom of the two-section BAF reactor, the water outlet at the top of the two-section BAF reactor is communicated with the inlet of a water outlet pool, the water outlet pool is communicated with the bottom of the two-section BAF reactor, and the water outlet pool is communicated with a downstream pipeline; a reflux outlet at the top of the two-section type BAF reactor is communicated with a circulating water pool, and an outlet of the circulating water pool is communicated with an inlet at the bottom of the two-section type BAF reactor; the aeration fan and the back flushing fan are respectively communicated with the two-section BAF reactor. The system is suitable for advanced treatment of landfill leachate MVR evaporation effluent, and the effluent COD and ammonia nitrogen meet higher effluent requirements.
Description
Technical Field
The utility model relates to a two segmentation BAF biochemical systems processing technique especially relates to a two segmentation BAF biochemical systems.
Background
Urban garbage is a great problem in urban environment management. Landfill leachate in refuse transfer stations, incineration sites or landfill sites is generated from various compounds and rotten substances, contains BOD, COD, nitrogen-containing compounds, phosphorus-containing compounds, organic halides, sulfides, inorganic salts and the like with extremely high concentration, and is not only smelly but also a few carcinogens.
The source of the landfill leachate mainly has four aspects: the garbage contains water, water generated by biochemical reaction of the garbage, reverse osmosis of underground diving, atmospheric precipitation and the like, wherein the atmospheric precipitation has centralization, short-term property and repeatability and accounts for most of the total amount of the leachate. If the water is discharged to the ground, pollutes the environment or is dissolved in the ground, the polluted water source is a great harm to the urban environment and the human health. And the longer the landfill time is, the higher the concentration of leachate is, and the greater the damage is.
The landfill leachate is high-concentration organic wastewater which has complex components and large change of water quality and water quantity and has the following main characteristics:
(1) high concentration of pollutant
(2) High content of organic pollutants and complex components
(3) Serious imbalance of proportion of microorganism nutrient elements in percolate
(4) Great change of water quality
(5) The metal content is higher
The factors influencing the components of the landfill leachate mainly comprise: the garbage composition, the site climatic condition, the hydrogeology rainfall condition of the site, the landfill condition, the landfill time and the like determine that the change of the water quality and the water quantity of the garbage leachate is large and the change rule is complex. Because the CO2 generated by the degradation of the garbage is dissolved, the garbage leachate is slightly acidic, and the dissolution of water-insoluble carbonate, metal oxide and the like in the garbage is accelerated by the slightly acidic environment, so that the leachate contains metal ions with higher concentration.
The difficulty of landfill leachate treatment is also manifested by its variability:
(1) the production amount is changed seasonally, and the rainy season is obviously larger than the dry season.
(2) The pollutant composition changes seasonally, and the pollutant composition and concentration in the leachate in dry and cold seasons of the landfill in plain areas are lower.
(3) The pollutant composition and its concentration vary with the age of the landfill.
In general, CODCr, BOD5, BOD5/CODCr decrease with "age" of the landfill and alkalinity levels increase. In addition, with the increase of the stacking age, the fresh garbage is gradually changed into the stale garbage, the content of organic matters in the percolate is reduced to some extent, but the content of ammonia nitrogen is increased, and the biodegradability is reduced.
Because the biodegradability of the landfill leachate is reduced along with the prolonging of the years, the direct treatment of the landfill leachate stock solution by a biochemical method is not ideal, so that the MVR evaporation treatment is carried out on the landfill leachate, and the B/C ratio of the evaporated effluent is effectively improved.
With the improvement of national emission requirements, the MVR evaporation treatment is difficult to meet the requirements of the standard, so that the two-section type BAF biochemical system is used for treating the MVR evaporated effluent of the landfill leachate, can reach higher standards, has low cost and is a great progress of the MVR evaporation process.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a to the problem that present landfill leachate relies on MVR evaporation treatment to hardly reach this standard, provide a two segmentation BAF biochemical system, this system is applicable to advanced treatment landfill leachate MVR evaporation effluent, makes water COD, ammonia nitrogen satisfy higher water requirement, just the utility model discloses two segmentation BAF reactors have area little, and the treatment effect is good, and investment construction cost is low, advantage such as running cost is low.
In order to achieve the above object, the utility model adopts the following technical scheme: a two-stage BAF biochemical system comprises a two-stage BAF reactor, a water inlet pool, a circulating water pool, a water outlet pool, an aeration fan and a back flushing fan, wherein the two-stage BAF reactor comprises a nitrification region and a denitrification region which are arranged from top to bottom;
the outlet of the water inlet pool is communicated with the bottom of the two-section type BAF reactor through a water inlet pump, the water outlet at the top of the two-section type BAF reactor is communicated with the inlet of a water outlet pool, the water outlet pool is communicated with the bottom of the two-section type BAF reactor through a back washing pump, and the water outlet pool is communicated with a downstream pipeline through a water outlet pump (the water outlet pool of the utility model integrates the functions of the water outlet pool and the back washing pool into a whole); the top reflux outlet of the two-section type BAF reactor is communicated with a circulating water tank, and the outlet of the circulating water tank is communicated with the bottom inlet of the two-section type BAF reactor through a circulating water pump;
the aeration fan and the back flushing fan are respectively communicated with the bottom of the nitrification area and the bottom of the denitrification area of the two-section BAF reactor.
Further, the inlet of the water inlet pool is communicated with the evaporative effluent of the landfill leachate.
Furthermore, the two-stage BAF reactor comprises a nitrification region and a denitrification region which are arranged from top to bottom, wherein the nitrification region is provided with a reflux outlet, and the reflux outlet (through a circulating water tank and a circulating water pump) is communicated with the denitrification region so as to enable the wastewater to flow back to the denitrification region.
Furthermore, the denitrification area comprises a water distribution area, a filter plate, a long-handle filter head, a bearing layer and a filler area, the water distribution area comprises a water distribution pump, a water distribution pipe and a water distribution system, the water distribution pump is communicated with the water distribution system through the water distribution pipe, the filter plate is arranged at the bottom of the denitrification area and above the water distribution system, the long-handle filter head is mounted on the filter plate and is communicated with the water distribution system, the bearing layer is placed on the filter plate, and the filler layer is placed on the bearing layer. But without an aeration system, the denitrification area has a structure similar to that of the biological aerated filter. The long-handle filter head is used for water distribution, back washing and back flushing.
Furthermore, the nitrification region comprises a bearing layer, an aeration system, a filler region and a clear water region, the bearing layer of the nitrification region is arranged on a filler layer of the denitrification region, the aeration system is arranged in the bearing layer, the aeration system comprises an aeration pipe and a single-hole membrane aerator, the filler layer is arranged on the bearing layer, and the part without the filler on the top of the nitrification region is the clear water region. The structure of the nitrification area is similar to that of the biological aerated filter,
further, the aeration system comprises an aeration pipe and a single-hole membrane aerator arranged on the aeration pipe.
Furthermore, a filter plate of the denitrification area is arranged at the bottom of the filter tank, and the filter plate is provided with a filter plate
Furthermore, fillers are filled in the nitrification area and the denitrification area of the two-section type BAF reactor, and the fillers are 3-5 mm ceramic fillers.
Further, the nitrification zone is an aerobic section, and the dissolved oxygen of the nitrification zone is required to be 2-4 mg/L, preferably 2.5-3.5 mg/L.
Furthermore, the denitrification area is an anoxic section, and the dissolved oxygen of the denitrification area is required to be below 0.5 mg/L.
Further, the two-stage BAF reactor is circular or square in cross-section.
The utility model discloses two segmentation BAF biochemical systems are in landfill leachate MVR evaporation play water advanced treatment field's usage. The utility model integrates the nitrification-denitrification process and the biological aerated filter into a whole, and realizes the purpose of simultaneously removing COD and ammonia nitrogen. Effectively solves the problem that the organic matters and ammonia nitrogen in the MVR evaporated effluent of the landfill leachate do not accord with the discharge standard.
The utility model relates to a biochemical system of two segmentation BAF suitable for handle landfill leachate MVR evaporation effluent, its novel structure, the treatment effect is good, and area is little, compares with other prior art, has following advantage:
1) a biochemical system of two segmentation BAF, go out pond and back flush pond and use a pond, have and save area, the design is simple, advantages such as convenient operation.
2) Two segmentation BAF biochemical systems, two segmentation BAF divide into nitrify the district and denitrify the district, can get rid of COD and ammonia nitrogen simultaneously, and for ordinary aeration biological filter and ordinary AO technology, its ammonia nitrogen gets rid of effectually, and the clearance can reach more than 90%.
3) The utility model relates to a two segmentation BAF biochemical systems, the denitrification district and the biological aerated filter structure of two segmentation BAF reactors are similar, including joining in marriage water district, filter plate, long handle filter head, bearing layer, filler district. The wastewater is distributed to the supporting layer through the long-handle filter head and then uniformly flows through the filter material layer, so that the wastewater is fully reflected, the organic matter removal efficiency is high, and the removal effect is good.
4) Two segmentation BAF biochemical systems, nitrify the district's aeration pipe and install at the supporting layer middle part to above-mentioned installation haplopore membrane aerator makes its gas distribution very even, and the aeration is effectual, and oxygen transfer efficiency is high.
5) Two segmentation BAF biochemical systems, nitrify district upper portion and set up the backward flow export, return to the circulating water pond after, get into the denitrification district of two segmentation BAF reactors once more. Not only can realize the purpose of nitrification and denitrification, but also can flexibly adjust the water inlet load, more easily start the nitrification-denitrification system and effectively achieve the effect of removing COD and ammonia nitrogen.
6) Two segmentation BAF biochemical systems, two segmentation BAF reactors can be selected for use circularly, also can select for use squarely, can be according to the construction actual conditions, nimble designs such as mechanical strength.
To sum up, a two segmentation BAF biochemical systems be applicable to landfill leachate MVR evaporation effluent, make water COD, ammonia nitrogen satisfy higher water requirement, and two segmentation BAF reactors have that area is little, the treatment effect is good, investment construction cost is low, advantage such as running cost is low.
Drawings
FIG. 1 is a schematic structural diagram of a two-stage BAF biochemical system of the present invention;
FIG. 2 is a flow chart of the MVR evaporation effluent of the two-stage BAF biochemical system for treating landfill leachate of the present invention;
FIG. 3 is a schematic structural view of a two-stage BAF reactor
Wherein:
1. a denitrification zone; 2. a nitrification zone; 3. a water circulating pump; 4. a water inlet pump; 5. discharging the water pump; 6. backwashing the water pump; 7. an aeration fan; 8. a water inlet pool; 9. a circulating water tank; 10. a water outlet pool; 11. a support layer; 12. A back flushing air blower; 13. a ceramic filler; 15. a return outlet; 16. a water distribution system; 17. a water outlet; 18. a gas distribution system.
Detailed Description
The invention is further illustrated below with reference to the following examples:
example 1
The embodiment discloses a two-stage BAF biochemical system, which has a specific structure shown in fig. 1-3 and comprises a two-stage BAF reactor, a water inlet tank 8, a circulating water tank 9, a water outlet tank 10, an aeration fan 7 and a back flushing air fan 12, wherein the two-stage BAF reactor comprises a nitrification area 2 and a denitrification area 1 which are arranged from top to bottom;
the inlet of the water inlet tank 8 is communicated with the evaporated effluent of the landfill leachate, the outlet of the water inlet tank 8 is communicated with the inlet of the bottom of the two-section type BAF reactor (denitrification zone 1) through a water inlet pump 4, the water outlet 17 of the top of the two-section type BAF reactor (nitrification zone 2) is communicated with the inlet of the water outlet tank 10, the water outlet tank 10 is communicated with the bottom of the two-section type BAF reactor through a back washing pump 6, and the water outlet tank 10 is communicated with a downstream pipeline through a water outlet pump 5, so that the water outlet tank 10 of the utility model integrates the functions of the water outlet tank and the back washing tank; the top reflux outlet 15 of the two-section type BAF reactor is communicated with a circulating water pool 9, and the outlet of the circulating water pool 9 is communicated with the bottom inlet of the two-section type BAF reactor through a circulating water pump 3. Specifically, the nitrification region 2 is provided with a return outlet 15, and the return outlet is communicated with the denitrification region (through a circulating water tank 9 and a circulating water pump 3) so as to return the wastewater to the denitrification region.
The aeration fan 7 and the back flushing fan 12 are respectively communicated with the bottom of the nitrification area and the bottom of the denitrification area of the two-section BAF reactor.
The denitrification zone 1 comprises a water distribution zone, a filter plate, a long-handle filter head, a bearing layer and a filler zone, wherein the water distribution zone comprises a water distribution pump, a water distribution pipe and a water distribution system 16, the water distribution pump is communicated with the water distribution system 16 through the water distribution pipe, the filter plate is arranged at the bottom of the denitrification zone and above the water distribution system 16, the long-handle filter head is arranged on the filter plate and is communicated with the water distribution system 16, the bearing layer is arranged on the filter plate, and the filler layer is arranged on the bearing layer. But without an aeration system, the denitrification area has a structure similar to that of the biological aerated filter. The long-handle filter head is used for water distribution, back washing and back flushing. The denitrification area is an anoxic section, and the dissolved oxygen of the denitrification area is required to be below 0.5 mg/L.
The nitrification region 2 comprises a supporting layer 11, an aeration system, a filling region and a clear water region, and the structure of the nitrification region is similar to that of the biological aerated filter. The supporting layer of the nitrification region is arranged on the filler layer of the denitrification region, the aeration system is arranged in the supporting layer and comprises an aeration pipe and a single-hole membrane aerator, the filler layer is arranged on the supporting layer, and the part without the filler on the top of the nitrification region is a clean water region. The structure of the nitrification area is similar to that of a biological aerated filter, and the aeration system comprises an aeration pipe and a single-hole membrane aerator arranged on the aeration pipe. The nitrification zone is an aerobic section, and the dissolved oxygen of the nitrification zone is required to be 2-4 mg/L, preferably 2.5-3.5 mg/L. And the nitrification region and the denitrification region of the two-stage BAF reactor are filled with fillers, and the fillers are 3-5 mm ceramic fillers 13. An air distribution system 18 is further arranged below the supporting layer, an inlet of the air distribution system 18 is communicated with the aeration fan 7, and an outlet of the air distribution system 18 is communicated with the aeration pipe.
The cross section of the two-stage BAF reactor is round or square.
This embodiment is suitable for the working principle of MVR evaporation effluent, as shown in FIG. 3: the effluent water evaporated by MVR enters a water inlet tank 8, the water to be treated in the water outlet tank is conveyed to a denitrification area 1 of the two-section type BAF reactor by a water inlet pump 4, water is uniformly distributed through a long-handle filter head on a filter plate, and the filter plate, the filter head and the water distribution area form a water distribution system, so that the sewage entering the filter tank in a certain short time period can be uniformly mixed in a water distribution chamber and uniformly flows through a packing layer through the water distribution filter head, and a biological film and wastewater generate biochemical reaction in the filter material layer.
In the denitrification filter material layer, after microorganism and waste water fully react, reduce organic matter in the waste water, waste water flows into and nitrifies district 2, and aeration fan 7 distributes gas to nitrifying the district through aeration pipe and haplopore membrane aerator, and air and the same direction contact of sewage, and organic matter in the waste water and the microbial film on filler layer surface take place biochemical reaction, make organic matter in the sewage obtain fully degrading to take place nitration, its reaction principle is:
NH4++2O2→NO3 -+H2O+2H+
waste water flows out through the circulation mouth from nitrifying the district, flows into circulating water tank 9, drives into denitrification district 1 again through circulating water pump, makes waste water take place denitrification reaction to reach the denitrogenation purpose, effectively get rid of aquatic ammonia nitrogen, its reaction principle is:
NO3 -+5H (electron donor-organic) → 0.5N2+2H2O+OH-
The treated wastewater overflows into a water outlet pool through a water outlet to realize standard discharge;
after the operation time of the filler is too long, the biological film on the filler falls off, and backwashing is needed, generally steam-water combined backwashing.
The two-stage BAF biochemical system effectively solves the problems of organic matters and ammonia nitrogen exceeding of the evaporated effluent of the MVR of the landfill leachate. The method has the advantages of small occupied area, low investment cost, high treatment efficiency and the like;
finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (6)
1. A two-stage BAF biochemical system is characterized by comprising a two-stage BAF reactor, a water inlet pool, a circulating water pool, a water outlet pool, an aeration fan and a back flushing fan, wherein the two-stage BAF reactor comprises a nitrification area and a denitrification area which are arranged from top to bottom;
the outlet of the water inlet pool is communicated with the bottom of the two-section BAF reactor through a water inlet pump, the water outlet at the top of the two-section BAF reactor is communicated with the inlet of a water outlet pool, the water outlet pool is communicated with the bottom of the two-section BAF reactor through a back washing pump, and the water outlet pool is communicated with a downstream pipeline through a water outlet pump; the top reflux outlet of the two-section type BAF reactor is communicated with a circulating water pool, and the outlet of the circulating water pool is communicated with the bottom inlet of the two-section type BAF reactor through a circulating water pump;
the aeration fan and the back flushing fan are respectively communicated with the bottom of the nitrification area and the bottom of the denitrification area of the two-section BAF reactor.
2. The two-stage BAF biochemical system according to claim 1, wherein the inlet of the inlet tank is in communication with the landfill leachate evaporation effluent.
3. The two-stage BAF biochemical system according to claim 1, wherein the denitrification region comprises a water distribution region, a filter plate, a long-handle filter head, a support layer, and a packing region, the water distribution region comprises a water distribution pump, a water distribution pipe, and a water distribution system, and the water distribution pump is communicated with the water distribution system through the water distribution pipe; the filter plate is arranged at the bottom of the denitrification area and above the water distribution system, a long-handle filter head is arranged on the filter plate and is communicated with the water distribution system, a bearing layer is arranged on the filter plate, and a packing layer is arranged on the bearing layer.
4. The two-stage BAF biochemical system according to claim 1, wherein the nitrification region comprises a support layer, an aeration system, a filler region, and a clean water region, the support layer is disposed on a filler layer of the denitrification region, the aeration system is disposed in the support layer, the filler layer is disposed on the support layer, and the portion of the nitrification region without the filler layer is the clean water region.
5. The two-stage BAF biochemical system according to claim 4, wherein the aeration system comprises an aerator tube and a single-pore membrane aerator mounted on the aerator tube.
6. The two-stage BAF biochemical system according to claim 1, wherein the nitrification region and the denitrification region of the two-stage BAF reactor are filled with a filler, and the filler is a 3-5 mm ceramic filler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020210633.6U CN211999033U (en) | 2020-02-26 | 2020-02-26 | Two-stage BAF biochemical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020210633.6U CN211999033U (en) | 2020-02-26 | 2020-02-26 | Two-stage BAF biochemical system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211999033U true CN211999033U (en) | 2020-11-24 |
Family
ID=73423463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020210633.6U Active CN211999033U (en) | 2020-02-26 | 2020-02-26 | Two-stage BAF biochemical system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211999033U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111115823A (en) * | 2020-02-26 | 2020-05-08 | 大连广泰源环保科技有限公司 | Two-stage BAF biochemical system and application thereof |
-
2020
- 2020-02-26 CN CN202020210633.6U patent/CN211999033U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111115823A (en) * | 2020-02-26 | 2020-05-08 | 大连广泰源环保科技有限公司 | Two-stage BAF biochemical system and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102775025B (en) | Municipal life wastewater treatment system with high efficiency and low energy consumption | |
| CN100366551C (en) | Method and its device for denitrifying and removing pollutant of waste water | |
| CN101525207A (en) | Integrated pre-denitrification and denitrogenation biological filter sewerage treatment process | |
| CN102485668A (en) | Wastewater pretreatment method and application thereof | |
| WO2004087584A1 (en) | System and method for the treatment of wastewater using plants | |
| CN108314186B (en) | Aerobic-anaerobic-aerobic three-phase efficient oxygen supplementing wetland system | |
| CN214528587U (en) | Rural domestic sewage treatment system of nitrogen and phosphorus removal integration | |
| Guan et al. | Effect of operating factors on the contaminants removal of a soil filter: multi-soil-layering system | |
| Lester et al. | Sewage and sewage sludge treatment | |
| Mishukov et al. | Optimisation of wastewater treatment for safety in St Petersburg, Russia | |
| CN113307456A (en) | Improved sewage treatment method and device for MBBR (moving bed biofilm reactor) process | |
| CN216808519U (en) | Drinking water pretreatment system applying microorganisms and ecological purification process | |
| CN111847771A (en) | Slaughter wastewater treatment method and system | |
| CN211999033U (en) | Two-stage BAF biochemical system | |
| CN2543951Y (en) | Filling type baffle biological reactor | |
| CN107827324B (en) | Urban sewage comprehensive treatment system | |
| CN212609832U (en) | Series-connection backflow enhanced denitrification constructed wetland | |
| Wang et al. | Experimental study of high rate pond system treating piggery wastewater | |
| CN109574397B (en) | Multi-technology coupled efficient constructed wetland treatment system and method | |
| CN208071544U (en) | A kind of railway communication system production wastewater treatment system | |
| CN1296297C (en) | Deep cleaning treatment process for city effluent | |
| CN110240350A (en) | It is a kind of to enhance sewerage integrated equipment and impact resistance method using nitrification liquid reflux | |
| CN212954746U (en) | Slaughter wastewater treatment system | |
| CN111115823A (en) | Two-stage BAF biochemical system and application thereof | |
| CN110857236A (en) | Ecological river lake underwater forest construction method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |