CN1326788C - A/O type biological aeration capacity-enlarging method for sewage water treatment factory - Google Patents
A/O type biological aeration capacity-enlarging method for sewage water treatment factory Download PDFInfo
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- CN1326788C CN1326788C CNB200510096196XA CN200510096196A CN1326788C CN 1326788 C CN1326788 C CN 1326788C CN B200510096196X A CNB200510096196X A CN B200510096196XA CN 200510096196 A CN200510096196 A CN 200510096196A CN 1326788 C CN1326788 C CN 1326788C
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- aerated filter
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 153
- 239000010865 sewage Substances 0.000 title claims abstract description 95
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000005273 aeration Methods 0.000 title abstract description 8
- 238000004062 sedimentation Methods 0.000 claims description 21
- 239000000706 filtrate Substances 0.000 claims description 17
- 230000003260 anti-sepsis Effects 0.000 claims description 12
- 238000003860 storage Methods 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims description 3
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 3
- 230000001954 sterilising effect Effects 0.000 claims description 3
- 159000000013 aluminium salts Chemical class 0.000 claims description 2
- 229910000329 aluminium sulfate Inorganic materials 0.000 claims description 2
- 206010021143 Hypoxia Diseases 0.000 abstract 1
- 238000004659 sterilization and disinfection Methods 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 16
- 239000007789 gas Substances 0.000 description 10
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 9
- 229910052757 nitrogen Inorganic materials 0.000 description 8
- 239000002351 wastewater Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 230000001112 coagulating effect Effects 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 238000004065 wastewater treatment Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- -1 flushing supply Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 239000003643 water by type Substances 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000001471 micro-filtration Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
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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
Abstract
The present invention mainly relates to a method for the capacity enlargement of sewage treatment plants by an A/O type biological aeration filter pond. The present invention mainly comprises: firstly, the quality of outlet water of a secondary settling pond and a primary settling pond is measured, and an outlet water quality standard which needs reaching is determined; a water outlet end of the secondary settling pond (1) of secondary sewage treatment is provided with an inlet water regulation pond (4), water (Q1) is led out by the secondary settling pond (1) to the water inlet regulation pond (4), and the inlet water regulation pond (4) is connected with an A/O type biological aeration filter pond of tertiary sewage treatment; water (Q2) is led out from the primary settling pond (2) of primary sewage treatment or/and circulating water (Q3) is led out from a water outlet end (371) of the A/O type biological aeration filter pond of the tertiary sewage treatment to the inlet water regulation pond (4); the outlet water of the inlet water regulation pond (4) is led to a high-position pond (33) through a lifting pump (32), and is input to a pebble supporting layer (34) at the bottom of the A/O type biological aeration filter pond of the tertiary sewage treatment from a water outlet end of the high-position pond (33); water flows entering the pebble supporting layer (34) at the bottom of the A/O type biological aeration filter pond of the tertiary sewage treatment orderly pass through an oxygen deficiency section (35), an aerobic section (36) and a water outlet section (37), then, the water flows enter a disinfection contact pond (31), and after being disinfected, qualified water is exhausted.
Description
Technical field:
The present invention relates generally to the method that a kind of A/O of employing type biological aerated filter carries out sewage work's dilatation, can make effluent quality after the dilatation reach the water quality standard of national specified discharge standard or reuse of wastewater.
Background technology:
The implication of municipal sewage plant's dilatation is meant that the processing water yield of existing municipal sewage plant has reached the intrinsic water yield, but flooding quantity is also in continuous increase, and the capacity of existing treatment facility has not satisfied requirement, need undergo technological transformation and extend; Or existing municipal sewage plant is because a variety of causes, and effluent quality does not reach necessary requirement, need undergo technological transformation or the extension treatment facility to existing treatment process, to improve effluent quality; Or both have it concurrently.
Urban population and industrial production are along with the development of society constantly increases, corresponding municipal effluent amount (comprising sanitary sewage and the trade effluent that enters municipal sewage pipe network) also can be on the increase, particularly from the reform and opening-up since, along with the quickening of China's industrialization and Population Urbanization process, the increase trend of municipal effluent amount is accelerated day by day.In addition, the water quality of municipal effluent is also in continuous variation.But the designing treatment capacity of municipal sewage plant (comprising the water yield and water quality) has certain design period.Design period is meant that the design capacity of municipal sewage plant only can satisfy the capacity that reaches a certain time limit prediction, surpasses this time limit, and sewage work's existing installation will not reach the effluent quality of design, need dilatation or build new sewage work in addition.
There is strict requirement in country to the effluent quality of municipal sewage plant, and is the same with The world other various countries, along with The development in society and economy, the requirement of environmental quality also can correspondingly be improved, and the effluent quality after requiring to handle is more and more stricter.
China's water-quality guideline of municipal sewage plant the earliest mainly is biochemical oxygen demand (BOD) BOD
5With two of ss suspended solids." integrated wastewater discharge standard " of promulgation in 1988 begins to increase chemical oxygen demand COD, ammonia nitrogen NH in (GB8978-88)
3Main water-quality guideline such as-N." sewage comprehensively enters standard " of working out in 1996 proposed requirement to total phosphorus in (GB8978-1996), to chemical oxygen demand COD, biochemical oxygen demand (BOD) BOD
5, ammonia nitrogen NH
3-N, ss suspended solid all have new regulation.Wherein the primary standard of COD is 60mg/L, and secondary standard is 120mg/L; BOD
5Primary standard is 20mg/L, B0D
5Secondary standard is 30mg/L; NH
3-N primary standard is 15mg/L, and secondary standard is 25mg/L; The SS primary standard is 20mg/L, and secondary standard is 30mg/L.
Issued again in 2003 specially (GB18918-2002), the total nitrogen TN in the water outlet has been proposed requirement at " the urban wastewater treatment firm pollutant emission standard " of municipal sewage plant, and to the ammonia nitrogen NH in the water outlet
3-N has higher requirement, and wherein water outlet row is to the one-level B standard of III class waters execution, ammonia nitrogen NH
3The concentration of-N is 8mg/L (water temperature is lower than 12 ℃ the 15mg/L that is), and secondary standard is 25mg/L.Along with the continual renovation and the requirement of emission standard are more and more stricter, some municipal sewage plants that build up in early days are faced with the task of being badly in need of dilatation and technological transformation always, to adapt to the needs that emission standard is brought in constant renewal in.
In addition, because the shortage of China's water resources, " water shortage " phenomenon appears in many cities, and this trend is aggravation day by day, is restricting many local social economies and is further developing.The Chinese government is advocating the regeneration of recycling economy and sewage energetically, to alleviate present urban water shortage problem.The water yield of municipal effluent accounts for 80%～90% of urban water consumption.The municipal effluent not only water yield is big but also concentrate, and is a kind of potential water source for recycling, and the reuse water after advanced treatment can be used as cooling water, different purposes such as various cities miscellaneous water and landscape water.This can not only save great lot of water resources, and cheap many of also comparable use tap water can obtain considerable economic.China in up-to-date " the reuse of wastewater engineering design standard " issued in 2003 (GB50335-2002) in regulation: circulating cooling system (copper material interchanger) make up water requires NH
3-N≤1mg/L; Circulating cooling system (copper material interchanger) make up water, flushing supply, vehicle wash water etc. require turbidity≤5NTU; Circulating cooling system (copper material interchanger) make up water, flushing supply, water for scenic environment use etc. require BOD
5≤ 6～10mg/L; Water for scenic environment use requires TN≤15mg/L, TP≤0.5～2mg/L.The water quality standard of these reuse waters want the strictness of ratio sewage emission standard many, and at present the treatment process of each municipal sewage plant all for satisfying sewage drainage standard design.If will realize the municipal sewage as a resource utilization, each municipal sewage plant must carry out the dilatation construction, increases to build the advanced treatment facility, improves effluent quality, to satisfy the water quality requirement of reuse water.
Increasing the municipal sewage treatment amount and improving effluent quality has two kinds of different ways, builds new sewage work or carries out dilatation to having the municipal sewage plant now.The former is comparatively simple technically, but expending economically is very big; The latter can make full use of existing installation, tap the potential and upgrade technologically and adopt new modern technique, reduce newly-built treatment facility as far as possible, reduce construction cost and running cost, this is reasonably economically, when be preferred option, but because of being subjected to have now the restriction of the various conditions of sewage work, especially be subjected to the restriction of raw waste water treatment plant floor space, bring bigger difficulty to dilatation.
It is a lot of that advanced treatment of wastewater gets method.As coagulating sedimentation, filtration, charcoal absorption, micro-filtration etc.Consider that from economic aspect traditional deep treatment method generally is to adopt coagulating sedimentation and filtration, or coagulating sedimentation adds filtration, can make COD, the BOD of water outlet
5, water-quality guideline such as SS or turbidity obtains bigger improvement.But these methods are to removing the NH in the sewage
3The effect of-N and TN is very poor.Remove the NH in the sewage of low concentration
3The most cost-effective method of-N is the microbial film facture.As a kind of new technology---the biological aerated filter of microbial film facture sewage disposal, be used for the advanced treatment of wastewater of lower concentration, can effectively remove COD, BOD in the water
5, NH
3-N, SS or turbidity, and begun at home and abroad to be applied, but the prior biological aerating filter all belongs to aerobic type (O type), to total nitrogen TN in the removal sewage and the poor effect of total phosphorus TP, can not satisfy the requirement of removing TN and TP.
The inventor on May 11st, 2004 patent No. be 200410026149.3 to have applied for a kind of " a kind of sewage water treatment method and filter tank ".This A/O type biological aerated filter is used for the second-stage treatment equipment of municipal sewage treatment, but also has some problems as equipment in the capacity expansion.
Summary of the invention:
The method that the objective of the invention is to avoid the deficiencies in the prior art part and provide a kind of A/O of employing type biological aerated filter to carry out sewage work's dilatation.The present invention includes the preliminary sedimentation tank of one-level sewage disposal and the second pond of second-stage treatment, is the tertiary treatment that increases the dilatation of A/O type biological aerated filter in the back, water side of second pond, can further remove COD, BOD in the sewage
3, SS or turbidity, NH
3-N, TN and TP etc., increase existing sewage work the processing water yield and improve effluent quality comprehensively.And it is little to have floor space, characteristics such as economic saving.
Purpose of the present invention can be by realizing by the following technical solutions: the method that a kind of A/O of employing type biological aerated filter carries out sewage work's dilatation mainly includes:
A. the effluent quality standard of at first measuring second pond, preliminary sedimentation tank effluent quality and determining to reach.
B. the water side of the second pond of handling at B-grade sewage (1) is provided with entry equalizing tank (4), second pond (1) drawing-off water (Q
1) to entry equalizing tank (4), entry equalizing tank (4) is connected with the A/O type biological aerated filter of three grades of sewage disposals.
C. from preliminary sedimentation tank (2) drawing-off water (Q of one-level sewage disposal
2Or/and draw recirculated water (Q from the water side (371) of the A/O type biological aerated filter (3) of three grades of sewage disposals
3) to entry equalizing tank (4).In second pond (1) water outlet, lack denitrification and remove the required organism of TN, from preliminary sedimentation tank (2) drawing-off water (Q
2) to entry equalizing tank (4); In second pond (1) water outlet, lack denitrification and remove the required nitre nitrogen of TN, draw recirculated water (Q from the water side (371) of the A/O type biological aerated filter (3) of three grades of sewage disposals
3) to entry equalizing tank (4).
D. the water outlet of entry equalizing tank (4) to head-tank (33), is imported the bottom cobble supporting layer (34) of the A/O type biological aerated filter of three grades of sewage disposals through lift pump (32) by the water side of head-tank (33).
E. enter three grades of sewage disposals A/O type biological aerated filter bottom cobble supporting layer (34) current from bottom to top, pass through anoxic section (35), aerobic section (36) and water exit end (37) successively and enter antisepsis contact tank (31), after sterilizing, discharge qualified water.
The method that adopts A/O type biological aerated filter to carry out sewage work's dilatation, also including backwash step is, from the bottom spoil disposal in filter tank, the pressurized air that is produced by water storage in recoil water pump (5) the extraction antisepsis contact tank (31) and gas blower (392) enters cobble supporting layer (34) together more earlier; The recoil water outlet is discharged from the water exit end (37) of A/O type biological aerated filter (3), enters recoil water storage pool (38), returns preliminary sedimentation tank (2) again and handles.
The A/O type biological aerated filter (3) of described three grades of sewage disposals is provided with cobble supporting layer (34) in its bottom, which is provided with gas aerating system (391), top with gas aerating system (391) is aerobic section (36) and water exit end (37), and its underpart is anoxic section (35); In anoxic section (35) and aerobic section (36), be filled with filtrate; Also be provided with recoil usefulness gas diffuser (392) at cobble supporting layer (34); Water outlet at water exit end (37) is provided with outlet valve (371), and the one end is communicated with antisepsis contact tank (31), and the other end is communicated with entry equalizing tank (4); Between the bottom cobble supporting layer (34) of the A/O type biological aerated filter of antisepsis contact tank (31) and three grades of sewage disposals, be provided with recoil water pump (5).
Removing the total nitrogen reaction at anoxic section (35) denitrification is:
6NO
3 -+ 5CH
3OH (organism) → 5CO
2+ 3N
2↑+7H
2O+6OH
-
In the nitrated removal ammonia nitrogen reaction of aerobic section (36) be:
NH
4 ++2O
2→NO
3 -+2H
++2H
2O
The design calculation formula of aforesaid method and related parameter is arranged and the design of A/O type biological aerated filter has detailed description in " adopting the design and calculation method of the capable sewage work of A/O type biological aerated filter dilatation " of application on the same day.
The density of described filtrate is greater than the density of water, and the height that its filtrate is filled is 2.5-3.0m; The particle diameter of filtrate is 3-5mm.Can be haydite of selling on the market etc.
Method of the present invention also includes the step that adds dephosphorization agent trivalent aluminium salt or molysite when phosphorus exceeds standard in water inlet.Can satisfy the dephosphorization requirement, need not to be provided with equipment such as reaction, precipitation.
The invention has the beneficial effects as follows:
Can be existing sewage work increases the processing water yield and improves effluent quality comprehensively, comprises COD, BOD
5, SS or turbidity, NH
3Various water-quality guideline such as-N, TN, TP make the below standard sewage work of original water outlet up to standard, or further make effluent quality reach the water quality standard of reuse water, utilize.It is few to have floor space, advantages such as economic saving.
1. traditional municipal effluent tertiary treatment is coagulating sedimentation and filtration.These methods mainly are suspended solids and the colloidalmaterials of removing in the secondary treatment yielding water, and can remove the BOD that is produced of these pollution substances accordingly
5And COD, but these methods do not have significant effect to ammonia nitrogen and the total nitrogen of removing in the sewage, and when needs were further removed ammonia nitrogen and total nitrogen, these traditional tertiary treatment methods can not be used.Aerobic type biological aerated filter has the effect of good removal ammonia nitrogen, and to COD, BOD
5, SS, NH
3Pollutents such as-N also have goodish removal effect, water outlet BOD
5Can drop to below the 10mg/L with SS, but total nitrogen is not still had the ideal effect.A/O type biological aerated filter is the improvement of traditional aerobic type biological aerated filter, kept outside the various advantages of aerobic type biological aerated filter, the function that also has denitrogenation, compare with other tertiary treatment method, be fit to existing municipal sewage plant's dilatation, when satisfying new emission standard to the requirement of water outlet total nitrogen, other main water-quality guideline, as COD, BOD5, ammonia nitrogen, SS, etc. all can significantly descend, can improve the water quality of existing secondary treatment yielding water comprehensively.When needs, can make above-mentioned every index in the water outlet reach the water quality requirement of various reclaimed wastewater reuses.The tertiary treatment of employing A/O type biological aerated filter is transformed and is extended the aeration tank and increase secondary sedimentation basins as the engineering measure of existing municipal sewage plant's dilatation and wants simple.
2.A/O the efficient height that the type biological aerated filter is removed all contaminations matter, hydraulic detention time is short, and volume is little, and floor space is few.Through estimation, be used for the tertiary treatment of municipal sewage plant's dilatation of different situations, required hydraulic detention time, general about about 0.5-2 hour, comprise its auxiliary facility such as lift pump room, air blast machine rooms etc. are equivalent to or are no more than one-level handle required floor space interior, and this existing sewage work dilatation Scheme Selection to the soil anxiety has remarkable advantages.
3.A/O the type biological aerated filter, is difficult to carry out definite calculating, but can makes some simple analysis because of various particular case differences as the expense of sewage work's dilatation tertiary treatment.The construction cost of biological aerated filter wants the identical sand filter of specific volume expensive, mainly be that the used filtrate price of biological aerated filter is higher, but along with the use of domestic biological aerated filter is day by day extensive, the filtrate output that is specifically designed to biological aerated filter is also in continuous increase, and price is also descending.Development and the prosperous bridge biofilter material of producing have that performance is good, advantages of cheap price, can make biological aerated filter the same with the other biological treatment process, except requiring further dephosphorization, do not need to add any medicament, and working cost mainly is a power consumption.As tertiary treatment, the organic concentration in the water inlet is not high, and more organism is removed in the denitrification process of anoxic section, the technology gas consumption of aerobic section seldom, required gas-water ratio is very low, the power consumption of gas blower is few.The power consumption of A/O type biological aerated filter is mainly used in the lifting of sewage.Physical features as sewage work is smooth, and the water level of existing second pond water outlet or preliminary sedimentation tank water outlet is the end of than, if need effluent recycling, comprise recirculated water, all need water pump lifting to biological aerated filter, need several meters lifting head approximately, but this power consumption partly is also few.
Description of drawings:
Be described in further detail below in conjunction with the most preferred embodiment shown in the accompanying drawing:
Fig. 1 is the schematic flow sheet of A/O type biological aerated filter as sewage work's dilatation tertiary treatment.
Embodiment:
Embodiment 1: see Fig. 1, certain municipal sewage plant handles the water yield 20,000 m
3/ d.Effluent quality does not reach the regulation of new emission standard.Require to adopt A/O type biological aerated filter to carry out dilatation, its concrete grammar is:
A. the emission standard of measuring second pond, preliminary sedimentation tank effluent quality earlier and determining to reach:
A. measure second pond effluent quality C
1, COD=50mg/L; C
1, BOD5=20mg/L; C
1, TN=28mg/L; C
1NH3-N=18mg/L; C
1, NOX-N=8mg/L; C
1, SS=30mg/L; Tp=2mg/L.
B. measure preliminary sedimentation tank effluent quality: C
2, COD=220mg/L; C
2, BOD5=110mg/L; C
2, TN=35mg/L; C
2, NH3-N=30mg/L; C
2, NOX-N=1mg/L; C
2, SS=80mg/L; Tp≤2mg/L.
C. the one-level B standard in the emission standard " urban wastewater treatment firm emission standard " that needs to reach, C
3, COD=60mg/L; C
3, TN=20mg/L; C
3NH3-N=8mg/L; C
3, BOD5=20mg/L; C
3, SS=20mg/L; Tp≤1mg/L.
B. the water side of the second pond 1 of B-grade sewage processing is provided with entry equalizing tank 4, second pond 1 drawing-off water Q
1To entry equalizing tank 4, entry equalizing tank 4 is connected with the A/O type biological aerated filter of three grades of sewage disposals.
C. from the preliminary sedimentation tank 2 drawing-off water Q of one-level sewage disposal
2Be 890m
3/ d and draw recirculated water Q from the water side 371 of the A/O type biological aerated filter 3 of three grades of sewage disposals
3Be 834m
3/ d is to entry equalizing tank 4.
D. the water outlet of entry equalizing tank 4 to head-tank 33, is imported the bottom cobble supporting layer 34 of the A/O type biological aerated filter of three grades of sewage disposals through lift pump 32 by the water side of head-tank 33.
E. enter three grades of sewage disposals A/O type biological aerated filter bottom cobble supporting layer 34 current from bottom to top, enter antisepsis contact tank 31 through anoxic section 35, aerobic section 36 and water exit end 37 successively, the qualified water of discharge through sterilizing after.
F. backwash step is, from the bottom spoil disposal in filter tank, the pressurized air that is produced by water storage in the recoil water pump 5 extraction antisepsis contact tanks 31 and gas blower 392 enters cobble supporting layer 34 together more earlier; The recoil water outlet is discharged from the water exit end 37 of A/O type biological aerated filter 3, enters recoil water storage pool 38, returns preliminary sedimentation tank 2 again and handles.
The A/O type biological aerated filter 3 of three grades of sewage disposals adopting is provided with cobble supporting layer 34 in its bottom, which is provided with gas aerating system 391, and be aerobic section 36 and water exit end 37 with the top of gas aerating system 391, its underpart is an anoxic section 35; In anoxic section 35 and aerobic section 36, be filled with filtrate; Also be provided with recoil usefulness gas diffuser 392 at cobble supporting layer 34; Water outlet at water exit end 37 is provided with outlet valve 371, and the one end is communicated with antisepsis contact tank 31, and the other end is communicated with entry equalizing tank 4; Between the bottom cobble supporting layer 34 of the A/O type biological aerated filter of antisepsis contact tank 31 and three grades of sewage disposals, be provided with recoil water pump 5.
The volume of aerobic section is 790m
3, the volume of anoxic section is 818m
3, total useful volume in filter tank is 1608m
3, total effectively hydraulic detention time is 111min.The filtrate density that is adopted is greater than the density of water, and the height that its filtrate is filled is 3.0m; The particle diameter of filtrate is 3mm.Can be haydite of selling on the market etc.
Add the Tai-Ace S 150 dephosphorization agent in water inlet, dosage is 15mg/L.
Water after treatment is up to standard.
Embodiment 2: certain municipal sewage plant, handle the water yield 30,000 m
3/ d, every water-quality guideline of water outlet has all reached the requirement of sewage drainage standard.Now this factory carries out the dilatation construction, further improve effluent quality, water outlet will be as near the water for scenic environment use of Scenic Spot Area, the scheme of dilatation construction is elected A/O type bio-aeration tertiary treatment as, makes effluent quality reach the water quality standard of " reuse of wastewater engineering design standard " the ornamental water (lake class) in (GB50335-2002) comprehensively.
A. the emission standard of at first measuring second pond, preliminary sedimentation tank effluent quality and determining to reach:
1. second pond effluent quality:
C
1，COD＝40mg/L C
1，＝12mg/L
C
1，TN＝20mg/L C
1＝7mg/L
C
1＝9mg/L C
1，SS＝15mg/L C
1，TP＝0.8mg/L
2. preliminary sedimentation tank effluent quality:
C
2，COD＝250mg/L C
2，＝120mg/L
C
2，TN＝38mg/L C
2，＝30mg/L
C
2，＝0.5m/L C
2，SS＝75mg/L C
2，TP＝3mg/L
3. require the effluent quality standard:
BOD
5≤6mg/L SS≤10mg/L
TN≤15mg/L NH
3-N≤5mg/L TP≤0.5mg/L
According to the above data that provides, the effluent quality of this sewage work is reached comprehensively " reuse of wastewater engineering design standard " (GB50335-2002) in the water quality standard of ornamental water (lake class) of regulation, the water-quality guideline that needs further to handle have BOD
5, SS, TN, NH
3Five of-N, TP etc.
B. the water side of the second pond 1 of B-grade sewage processing is provided with entry equalizing tank 4, second pond 1 drawing-off water Q
1To entry equalizing tank 4, entry equalizing tank 4 is connected with the A/O type biological aerated filter of three grades of sewage disposals.
C. drawing-off water Q from the preliminary sedimentation tank 2 of one-level sewage disposal
2Be 520m
3/ d is to entry equalizing tank 4.
Below each step identical with last example.
The structure of the A/O type biological aerated filter that is adopted and the connection of each equipment are all identical with last example.The volume of aerobic section is 390m
3, the volume of anoxic section is 480m
3, total useful volume in filter tank is 870m
3, total effectively hydraulic detention time is 42min; The filtrate density that is adopted is greater than the density of water, and the height that its filtrate is filled is 2.5m; The particle diameter of filtrate is 5mm.Can be haydite of selling on the market etc.
Add the dephosphorization agent molysite in water inlet, dosage is 6mg/L.
Water after treatment is up to standard.
Claims (5)
1. method that adopts A/O type biological aerated filter to carry out sewage work's dilatation, its feature includes:
A. the effluent quality standard of at first measuring second pond, preliminary sedimentation tank effluent quality and determining to reach.
B. the water side of the second pond of handling at B-grade sewage (1) is provided with entry equalizing tank (4), second pond (1) drawing-off water (Q
1) to entry equalizing tank (4), entry equalizing tank (4) is connected with the A/O type biological aerated filter of three grades of sewage disposals.
C. from preliminary sedimentation tank (2) drawing-off water (Q of one-level sewage disposal
2) or/and draw recirculated water (Q from the water side (371) of the A/O type biological aerated filter (3) of three grades of sewage disposals
3) to entry equalizing tank (4).
D. the water outlet of entry equalizing tank (4) to head-tank (33), is imported the bottom cobble supporting layer (34) of the A/O type biological aerated filter of three grades of sewage disposals through lift pump (32) by the water side of head-tank (33).
E. enter three grades of sewage disposals A/O type biological aerated filter bottom cobble supporting layer (34) current from bottom to top, pass through anoxic section (35), aerobic section (36) and water exit end (37) successively and enter antisepsis contact tank (31), after sterilizing, discharge qualified water.
2. the method that employing A/O type biological aerated filter as claimed in claim 1 carries out sewage work's dilatation, its feature also includes backwash step, from the bottom spoil disposal in filter tank, the pressurized air that is produced by water storage in recoil water pump (5) the extraction antisepsis contact tank (31) and gas blower (392) enters cobble supporting layer (34) together more earlier; The recoil water outlet is discharged from the water exit end (37) of A/O type biological aerated filter (3), enters recoil water storage pool (38), returns preliminary sedimentation tank (2) again and handles.
3. the method that employing A/O type biological aerated filter as claimed in claim 1 or 2 carries out sewage work's dilatation, the A/O type biological aerated filter (3) that its feature also includes described three grades of sewage disposals is provided with cobble supporting layer (34) in its bottom, which is provided with gas aerating system (391), top with gas aerating system (391) is aerobic section (36) and water exit end (37), and its underpart is anoxic section (35); In anoxic section (35) and aerobic section (36), be filled with filtrate; Also be provided with recoil usefulness gas diffuser (392) at cobble supporting layer (34); Water outlet at water exit end (37) is provided with outlet valve (371), and the one end is communicated with antisepsis contact tank (31), and the other end is communicated with entry equalizing tank (4); Between the bottom cobble supporting layer (34) of the A/O type biological aerated filter of antisepsis contact tank (31) and three grades of sewage disposals, be provided with recoil water pump (5).
4. the method that employing A/O type biological aerated filter as claimed in claim 3 carries out sewage work's dilatation is characterized in that the density of the density of described filtrate greater than water, and the height that its filtrate is filled is 2.5-3.0m; The particle diameter of filtrate is 3-5mm.
5. the method that employing A/O type biological aerated filter as claimed in claim 4 carries out sewage work's dilatation is characterized in that also including the step that adds dephosphorization agent trivalent aluminium salt or molysite in water inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510096196XA CN1326788C (en) | 2005-10-13 | 2005-10-13 | A/O type biological aeration capacity-enlarging method for sewage water treatment factory |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510096196XA CN1326788C (en) | 2005-10-13 | 2005-10-13 | A/O type biological aeration capacity-enlarging method for sewage water treatment factory |
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| CN1800060A CN1800060A (en) | 2006-07-12 |
| CN1326788C true CN1326788C (en) | 2007-07-18 |
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| MD4483C1 (en) * | 2016-12-19 | 2017-12-31 | Василий ВЫРЛАН | Sewage treatment plant and process and floating load |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003065798A1 (en) * | 2002-02-07 | 2003-08-14 | Greenfish Ab | Integrated closed loop system for industrial water purification |
| US6620322B1 (en) * | 2002-06-21 | 2003-09-16 | Smith & Vesio Llc | Apparatus and methods for purifying a waste influent material |
| CN1491903A (en) * | 2003-08-15 | 2004-04-28 | 常建一 | Integrated aeration boilogical filter tank |
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2005
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003065798A1 (en) * | 2002-02-07 | 2003-08-14 | Greenfish Ab | Integrated closed loop system for industrial water purification |
| US6620322B1 (en) * | 2002-06-21 | 2003-09-16 | Smith & Vesio Llc | Apparatus and methods for purifying a waste influent material |
| CN1491903A (en) * | 2003-08-15 | 2004-04-28 | 常建一 | Integrated aeration boilogical filter tank |
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