CN1182049C - Double-layer filter material biological aeration filter pond - Google Patents
Double-layer filter material biological aeration filter pond Download PDFInfo
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- CN1182049C CN1182049C CNB021296189A CN02129618A CN1182049C CN 1182049 C CN1182049 C CN 1182049C CN B021296189 A CNB021296189 A CN B021296189A CN 02129618 A CN02129618 A CN 02129618A CN 1182049 C CN1182049 C CN 1182049C
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- 239000000463 material Substances 0.000 title claims abstract description 43
- 238000005273 aeration Methods 0.000 title abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 238000011010 flushing procedure Methods 0.000 claims abstract description 45
- 239000007789 gas Substances 0.000 claims abstract description 9
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000002028 Biomass Substances 0.000 claims abstract description 6
- 239000000706 filtrate Substances 0.000 claims description 29
- 238000009826 distribution Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 9
- 238000005406 washing Methods 0.000 claims description 7
- 238000005261 decarburization Methods 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 claims description 6
- 238000011049 filling Methods 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 230000000737 periodic effect Effects 0.000 claims description 3
- 238000009827 uniform distribution Methods 0.000 claims description 3
- 230000001788 irregular Effects 0.000 claims description 2
- 239000010865 sewage Substances 0.000 abstract description 9
- 239000000126 substance Substances 0.000 abstract description 6
- 239000010802 sludge Substances 0.000 abstract description 2
- 230000001546 nitrifying effect Effects 0.000 abstract 3
- 230000000694 effects Effects 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- QGZKDVFQNNGYKY-OUBTZVSYSA-N Ammonia-15N Chemical compound [15NH3] QGZKDVFQNNGYKY-OUBTZVSYSA-N 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000004523 agglutinating effect Effects 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005262 decarbonization Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 230000002906 microbiologic effect Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000011020 pilot scale process Methods 0.000 description 1
- 238000000247 postprecipitation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
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
- Biological Treatment Of Waste Water (AREA)
Abstract
The present invention discloses a double-layer filter material aeration biological filter belonging to sewage treatment. Two kinds of filter materials with different grain sizes are filled in the same equipment, and an intermediate discharge device is arranged at the juncture of two layers of filter materials. The wall of an intermediate discharge branch pipe of the intermediate discharge device is provided with a water flowing hole. Sludge, etc. is discharged from the intermediate discharge branch pipe in small backflushing, and gas and water are utilized to carry out alternating flushing in large backflushing and small backflushing. The double-layer filter material aeration biological filter has good effect when used for treating the low concentration domestic sewage. The double-layer filter material aeration biological filter can reduce the running resistance in a decarbonizing area and can make biomass in a nitrifying area accumulated to enhance the nitrifying efficiency. The water consumption for backflushing and the resistance loss for backflushing can be reduced, and the time for the effluent water quality to reach stability after the backflushing can be shortened. Compared with the prior art, the double-layer filter material aeration biological filter has the advantages that the decarbonizing function and the nitrifying function can be simultaneously realized in the same biological filter pool. More than 80% of organic substances can be removed, and the ammonia nitrogen removal rate can reach 95%. The double-layer filter material aeration biological filter is a better practical device with simple system and little investment in the current device for treating the low concentration domestic sewage.
Description
Technical field
The invention belongs to waste disposal plant, particularly a kind of a kind of double-layer filter material aerating biological filter that low concentration sewage is handled.
Background technology
BAF (BAF) is the sewage treatment process that rises at the end of the eighties and the beginning of the nineties, at first as tertiary treatment, after develop into and be directly used in second-stage treatment.It uses the particulate filter of rough porous, and the filter material surface growth has microbial film, and aeration is provided at the bottom of the pond, and during the effluent stream filter bed, pollutent at first is filtered and adsorbs, and then is decomposed by the microbiological oxidation of filter material surface.Its maximum characteristics are to integrate bio-oxidation and hold back suspended substance, have saved the post precipitation pond, and it is big to have a volumetric loading, and hydraulic detention time is short, and initial cost is few, the effluent quality advantages of higher.The patented product BIOFOR technology of France Degremont S.A generally adopts the 3-5mm haydite as filtrate, is divided into two-stage; The neat soldier of Tsing-Hua University has proposed the method for the incomplete back flushing of a kind of BAF by force first in its Tsing-Hua University Ph D dissertation of calendar year 2001 " BAF (BIOFOR) is handled the sanitary sewage pilot scale research ".
But these have shortcoming, mainly show as:
(1) employing is with a kind of filtrate of particle size range.So, if particle diameter is too small, stop up easily, and particle diameter is excessive, then the filtrate external surface area is less, and biomass is little, and processing efficiency is low, and both are difficult for taking into account.
(2) cycle of operation is short.Because the heterotrophic bacterium sludge age is short, growth causes increasing very fast near head loss in the filtering layer of water inlet rapidly, need frequent back flushing,, be prone to filtrate agglutinating phenomenon if the back flushing water distribution is inhomogeneous, can cause the filter tank effluent quality to worsen at last, resistance rises, the maintenance of stopping transport of having to.
(3) BIOFOR is difficult for back flushing.Backwash intensity is big, backwash water amount big (maximum can reach 40%), the backwash time is long, and after the back flushing time of recovery grow (＞2h).
(4) be unfavorable for finishing simultaneously decarburization and nitrification function.If the removal of organism and ammonia nitrogen is finished in an equipment, will owing to heterotrophic bacterium growth rapidly, need frequent backwash and influence the growth of nitrifier.If decarburization and nitrification function are finished in the BAF of two polyphones, because organic removal has just been finished in very short zone, therefore under normal flow 4～6m/h, the height of decarbonization section is very low, causes the waste of equipment; Improve filtering velocity increase load if rely on, can increase kinetic equation loss, shorten backwashing period, uneconomical equally.
Summary of the invention
The purpose of this invention is to provide a kind of double-layer filter material aerating biological filter, described biological filter mainly is made up of water inlet distribution device, supporting layer, double filtering layer, technology aerating apparatus, back flushing distribution device, middle comb, water outlet, it is characterized in that: in an equipment, load double-layer filter material, wherein one deck particle diameter of filter medium is thick, and another metafiltration material particle diameter is thin; The filtrate of different-grain diameter is used for realizing simultaneously decarburization and nitrification function; And at the intersection that is positioned at upper filter material layer 1 and lower filter material layer 2, comb 7 in the installation, open aperture on middle comb Zhi Guanbi, are used to discharge the mud of back flushing; The upper and lower two-layer of double-layer filter material aerating biological filter can be taked different backwash modes.
It is thick, thin or equal or opposite down that the height thick, thin two-layer filtrate of described filling is respectively.Lower filter material layer 2 is the filtrate of coarse grain footpath 4-6mm, is used to improve the water environment capacity in filter tank, prolongs the periodic duty time in filter tank; The filtrate of upper filter material layer 1 filling fine grain size 1～3mm is used to increase the specific surface area of filtrate, thereby improves the nitrifier biomass that adheres to, and improves ammonia nitrogen removal frank.
Described two-layer filtrate can be with a kind of filtrate, also can be the proximate different sorts filtrate of density, and its shape both can be the rule filtrate, also can be irregular filtrate.
Described backwash mode adopts large and small back flushing alternately, carries out a big bounce after every 5-7 little back flushing and washes, and carries out little back flushing earlier before each big bounce is washed.Its backwash process is: pressurized air enters from gas inlet 4 during back flushing, and by back flushing distribution device 13 uniform distribution, clear water enters from back flushing water-in 8.Back flushing mud is discharged by middle comb 7 during little back flushing, when washing, big bounce then discharges by the last water port 6 that is positioned at double-layer filter material aerating biological filter top, after water surface loss in filter tank reaches the 1-2m height, unite with pressurized air and clear water and to carry out back flushing, the water that recoil washes out is can put into operation behind the primary water.
The invention has the beneficial effects as follows that the present invention both can reduce the running resistance in decarburization district, can make the nitrification zone biomass obtain accumulation again, improve nitrification efficiency; Also can reduce backwash water amount and back flushing drag losses in addition, effluent quality reaches the stable time after the shortening back flushing.Compared with prior art, the advantage that the present invention had is:
(1) can in a BAF, realize decarburization and nitrification function simultaneously, organism and ammonia nitrogen are had higher removal.COD (chemical oxygen demand (COD)) clearance is more than 80%, and ammonia nitrogen removal frank can reach 95%.
(2) operation and backwash resistance are little, and the cycle of operation is long, and the backwash water consumption is low.Running resistance generally can not surpass 2m, and 24h just needs once little of backwash, and 5-7 all after date just needs a big bounce to wash, and back flushing consumes in 10% from water.
(3) recover normal operating condition required time weak point behind the small reverse washing, in 2h.
(4) gas-water ratio is low, and only 2: 1～6: 1, working cost was low.
(5) with respect to two-stage BAF, floor space is little, and system is simple, less investment.
Description of drawings
Fig. 1 is a double-layer filter material aerating filter tank structural representation.
Embodiment
Figure 1 shows that double-layer filter material aerating filter tank structural representation.Double-deck BAF mainly is made up of top filter material layer 1, bottom filter material layer 2, supporting layer 11, porous plate water inlet distribution device 12, technology aerating apparatus 10, back flushing distribution device 13, and at the intersection that is positioned at upper filter material layer 1 and lower filter material layer 2, comb 7 in the installation, perforate 14 on the branch pipe wall of middle comb 7, be convenient to the upper and lower two-layer of double-layer filter material aerating biological filter and can take different backwash modes, and the mud when being used to drain little back flushing.Filtrate at the filling coarse grain footpath 4-6mm of lower floor is used to improve the water environment capacity in filter tank, prolongs the periodic duty time in filter tank; Filtrate at upper strata filling fine grain size 1～3mm is used to increase the specific surface area of filtrate, thereby improves the biomass of nitrifier, improves ammonia nitrogen removal frank.Sewage enters from water-in 9 during operation, by water inlet distribution device 12, passes supporting layer 11, removes suspended substance, COD, BOD through lower filter material layer 2 and upper filter material layer 1
5Behind (biochemical oxygen demand (BOD)) and the ammonia nitrogen, discharge from water outlet 5, pressurized air enters by 3 simultaneously, by technology aerating apparatus 10 aerations, for microorganism growth provides oxygen; Pressurized air enters from gas inlet 4 during backwash, and by back flushing distribution device 13 uniform distribution, clear water enters from backwash water-in 8.Back flushing mud is discharged by middle comb 7 during small reverse washing, is then discharged by the last water port (6) that is positioned at double-layer filter material aerating biological filter top when big bounce is washed.Just carried out once little back flushing in general 24 hours, its process is opened middle comb 7 for closing water outlet 5 earlier, and emptying top water is (10-15) L/m with intensity earlier
2.s gas carries out gas back flushing 2-4min, is (8-12) L/m with water intensity again
2.s carry out air water together with washing 3-6min with gas, totally put into operation with the water rinse of same intensity.Through 5～7 all after dates, big bounce is washed once again, and its process and little back flushing are basic identical.(be generally about 1～2m) to unite with pressurized air and clear water after the filter tank head loss reach a certain height and carry out back flushing, the water that recoil washes out is can put into operation behind the primary water.
The present invention is further described to enumerate two embodiment below again:
Embodiment 1:
The processing of low concentration sanitary sewage (COD concentration is 100-250mg/l): the bottom particle diameter of filter medium is 4～6mm, and density is (1800～2200) kg/m
3, highly be 1-1.5m; The top filtrate is 2-3mm, and density is (1800～2200) kg/m
3, highly be 2～3m.Operation water flow velocity 2-3m/h, water-gas ratio is 1: 3～1: 6.The large and small back flushing alternative of this process using method is carried out back flushing, carries out a big bounce after about 5-7 the little back flushing and washes.The combined water and air backwash mode is all adopted in large and small back flushing.The suspended substance removal rate is about about 80%, and the COD clearance is about about 80%, and ammonia-N removal rate is 80～95%.
Embodiment 2:
The processing of extremely low concentration sanitary sewage (COD concentration＜100mg/l): the bottom particle diameter of filter medium is 3～5mm, and density is (1800～2200) kg/m
3, highly be 1-1.5m; The top filtrate is 1-3mm, and density is (1800～2200) kg/m
3, highly be 2～3m.Operation water flow velocity 3-6m/h, water-gas ratio is 1: 2～1: 4.The large and small back flushing alternative of this process using method is carried out back flushing, carries out a big bounce again after about 5-7 little back flushing and washes.The combined water and air backwash mode is all adopted in large and small back flushing.The suspended substance removal rate is about about 80%, and the COD clearance is about about 80%, and ammonia-N removal rate is 80～95%.
Claims (4)
1. double-layer filter material aerating biological filter, described biological filter mainly is made up of water inlet distribution device, supporting layer, double filtering layer, technology aerating apparatus, back flushing distribution device, middle comb, water outlet, it is characterized in that: in an equipment, load double-layer filter material, wherein one deck particle diameter of filter medium is thick, and another metafiltration material particle diameter is thin; The filtrate of different-grain diameter is used for realizing simultaneously decarburization and nitrification function; And at the intersection that is positioned at upper filter material layer (1) and lower filter material layer (2), comb in the installation (7) is opened aperture on middle comb (7) Zhi Guanbi, be used to discharge the mud of backwash; The upper and lower two-layer of double-layer filter material aerating biological filter can be taked different backwash modes.
2. according to the described double-layer filter material aerating biological filter of claim 1, it is characterized in that: the height of the two-layer filtrate of thickness of described filling is respectively thick, thin or equal or opposite down, lower filter material layer (2) is the filtrate of coarse grain footpath 4-6mm, be used to improve the water environment capacity in filter tank, prolong the periodic duty time in filter tank; The filtrate of upper filter material layer (1) filling fine grain size 1～3mm is used to increase the specific surface area of filtrate, thereby improves the nitrifier biomass that adheres to, and improves ammonia nitrogen removal frank.
3. according to the described double-layer filter material aerating biological filter of claim 1, it is characterized in that: described two-layer filtrate can be with a kind of filtrate, also can be the proximate different sorts filtrate of density, and its shape both can be the rule filtrate, also can be irregular filtrate.
4. according to the described double-layer filter material aerating biological filter of claim 1, it is characterized in that: described backwash mode adopts big, little back flushing alternately, carry out big reverse washing one time after every 5-7 little back flushing, carry out little back flushing earlier before each big reverse washing, its backwash process is: pressurized air enters from gas inlet (4) during back flushing, by back flushing distribution device (13) uniform distribution, clear water enters from back flushing water-in (8), backwash mud is discharged by middle comb (7) during little back flushing, when washing, big bounce then discharges by the last water port (6) that is positioned at double-layer filter material aerating biological filter top, after water surface loss in filter tank reaches the 1-2m height, unite with pressurized air and clear water and to carry out back flushing, the water that recoil washes out is can put into operation behind the primary water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021296189A CN1182049C (en) | 2002-09-04 | 2002-09-04 | Double-layer filter material biological aeration filter pond |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021296189A CN1182049C (en) | 2002-09-04 | 2002-09-04 | Double-layer filter material biological aeration filter pond |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1401592A CN1401592A (en) | 2003-03-12 |
| CN1182049C true CN1182049C (en) | 2004-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021296189A Expired - Fee Related CN1182049C (en) | 2002-09-04 | 2002-09-04 | Double-layer filter material biological aeration filter pond |
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| Country | Link |
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| CN (1) | CN1182049C (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100425548C (en) * | 2005-03-02 | 2008-10-15 | 深圳市清泉水业股份有限公司 | Non-blocking aeration biological filter |
| CN100460341C (en) * | 2007-06-21 | 2009-02-11 | 中国海洋大学 | Biological sewage-treating process |
| CN100584775C (en) * | 2008-08-12 | 2010-01-27 | 浙江省环境保护科学设计研究院 | The waste disposal plant of suspending biological filter and technology |
| CN101774687A (en) * | 2010-03-19 | 2010-07-14 | 哈尔滨工业大学 | Method for treating water of polluted water source by using double-stage aeration bio-filter |
| CN101792237B (en) * | 2010-03-26 | 2012-05-23 | 清华大学 | Composite biofilter |
| CN101786774A (en) * | 2010-03-29 | 2010-07-28 | 重庆大学 | Biological sewage treatment device and method for synchronous nitrogen and phosphorus removal and sludge reduction |
| CN101948173A (en) * | 2010-08-25 | 2011-01-19 | 深圳市碧园环保技术有限公司 | Composite filler for biological aerated filter and biological filter structure |
| CN103539255B (en) * | 2013-10-12 | 2016-05-04 | 华南理工大学 | Suspension haydite-active carbon double layer filter and apply it and process the method for former water |
| CN103663733B (en) * | 2013-12-25 | 2016-05-25 | 卞佳林 | A kind of BAF |
| CN106082428A (en) * | 2016-08-18 | 2016-11-09 | 环境保护部南京环境科学研究所 | A kind of with the alkali leaching excess sludge BAF system as filler and operation method thereof with filler preparation method |
| CN106946343A (en) * | 2017-05-03 | 2017-07-14 | 山东毅康科技股份有限公司 | A kind of efficiently backwash BAF |
| CN108083438B (en) * | 2018-01-26 | 2021-05-25 | 中持水务股份有限公司 | Downward flow BAF and MBBR double-membrane nitrification biological filter |
-
2002
- 2002-09-04 CN CNB021296189A patent/CN1182049C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1401592A (en) | 2003-03-12 |
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