CN2848842Y

CN2848842Y - Aeration biological filtering chamber

Info

Publication number: CN2848842Y
Application number: CNU2005201458422U
Authority: CN
Inventors: 傅金祥; 周晴
Original assignee: Shenyang Jianzhu University
Current assignee: Shenyang Jianzhu University
Priority date: 2005-12-20
Filing date: 2005-12-20
Publication date: 2006-12-20
Anticipated expiration: 2015-12-20

Abstract

The utility model relates to an aeration biological filtering tank comprising filtering columns. The utility model is characterized in that the filtering columns are composed of up flow type filtering columns in two stages; a liquid outlet of the top part of the first stage up flow type filtering column is connected to a liquid inlet of the bottom part of the second stage up flow type filtering column through a pipeline; the first stage up flow type filtering column is of aerated aerobiosis, the water inlet segment of the second stage up flow type filtering column is an anoxybiotic segment, and the filtering tank of the second stage filtering column, which is close to the water outlet segment, has an aerobic segment; consequently, the O-A-O type aeration biological filtering tank is formed. The utility model simplifies the treatment flow of domestic sewage, enhances the capability of denitrogenation and dephosphorization of the aeration biological filtering tank, and reduces engineering energy consumption. The utility model is suitable for treating domestic sewage or landscape waste water or factory waste water with small-and-medium-size flow. The utility model has the advantages of flexibility (favorable effect of treating waste water containing nitrogen and phosphorus), economy (low energy consumption for aeration and basically no requirement of expenses for basic construction) and environmental protection (reuse of reclaimed water after treatment as incidental water, such as greening water in a housing estate, etc.).

Description

BAF

Technical field

The utility model relates to a kind of BAF, particularly relate to a kind of O-A-O type BAF of handling nitrogenous phosphorus-containing wastewater that is applicable to, belong to water treating equipment, can be widely used in and handle municipal administration, the sub-district, the water treating equipment of public building and water scenery sewage.

Background technology

Because traditional activated sludge process is very low and a lot of deficiencies are arranged to the processing power of nitrogen, phosphorus.Along with the continuous strictness of sewage drainage standard, higher to the emission request of nutritive substance such as nitrogen, phosphorus in the sewage, from sanitary sewage and trade effluent, carry out the denitrogenation dephosphorizing processing and be faced with huge challenge.Traditional sewage treatment process with denitrogenation dephosphorizing function is many based on activated sludge process, often need a plurality of anaerobic and aerobic reaction tank polyphones, form the reaction of high order pond, by increasing the purpose that internal recycle reaches denitrogenation dephosphorizing, this certainly will will increase the expense and the energy consumption of initial cost, and makes operational management comparatively complicated.

The utility model content

The purpose of this utility model is to overcome the prior art above shortcomings, and the improvement by to existing BAF structure provides a kind of new O-A-O type high loading BAF.This novel BAF, employing is with traditional catalytic oxidation effect, the sewage disposal technology that the anoxic denitrogenation combines with the aeration process of feedwater conventional rapid filter, simplified the treatment scheme of sanitary sewage, improve the denitrogenation dephosphorizing ability of BAF and reduced the engineering energy consumption, be suitable for handling medium-sized, the sanitary sewage of small-sized flow, view waste water or plant area's waste water, nitrogenous phosphorus-containing wastewater had the good treatment effect, has handiness (filter post can lean on nitrogenous phosphorus water treatment effect fine), economy (aeration energy consumption is low, does not need capital cost substantially), the feature of environmental protection (also the miscellaneous waters such as greening done in the sub-district of reuse are pollution-free substantially but handle water in the back).

The technical scheme that the utility model provides is: this BAF mainly includes the filter post, be filled with particulate filter in the filter post, the filter material surface growth has microbial film, filter post inside is provided with aerating apparatus, be characterized in that described filter post is made of two-stage upflowing filter post, wherein one-level upflowing filter post is the aerobic formula of aeration (an O section), the inlet segment of secondary upflowing filter post is anoxic section (an A section), the anoxic segment length is decided according to required water quality treatment, secondary filter post is aerobic section (an O section) near the water exit end filter tank, the bottom of described one-level upflowing filter post is provided with fluid inlet, on the fluid inlet water distribution perforation plate and one-level boring aeration pipe, be provided with supporting layer on the one-level boring aeration pipe, be provided with the filtering layer of built-in biological filler on the supporting layer, its top is provided with liquid outlet and overflow port, the bottom of described secondary upflowing filter post is provided with fluid inlet, on the fluid inlet water distribution perforation plate and secondary back flushing micropore aeration pipe, be provided with supporting layer on the secondary back flushing micropore aeration pipe, be provided with the filtering layer of built-in biological filler on the supporting layer, the middle part of this filtering layer is provided with the secondary boring aeration pipe, its top is provided with liquid outlet and overflow port, the liquid outlet of described one-level upflowing filter column top is connected by the fluid inlet of pipeline with secondary upflowing filter column bottom, the fluid inlet of described one-level upflowing filter column bottom also is connected with one-level back flushing water inlet pipe, and the fluid inlet of described secondary upflowing filter column bottom also is connected with secondary back flushing water inlet pipe.

Principle of work of the present utility model is, the less particulate filter of a certain amount of particle diameter of filling in the filter post, the filter material surface microbial film of growing, the inner aeration of filter post, effluent stream through the time, utilize on the filtrate the strong oxidative degradation ability of high-concentration biological film amount that sewage is carried out fast purification, this is the oxidation degradation process; One-level filter post is an aerobic section, and under aerobic condition, organonitrogen in the reactor in the sewage and ammonia nitrogen are by the ammonifying bacteria ammonification.The one-level water outlet enters secondary anoxic section, and in the anoxic section, average dissolved oxygen concentration is 0.5mg/L in the reactor.Can obtain denitrification nitrogen and phosphorus removal effect preferably.Simultaneously, because of effluent stream through the time, filtrate is compaction state, utilizes particle diameter of filter medium features of smaller and biomembranous biological flocculation, holds back a large amount of suspended substances in the sewage, and guarantees that the microbial film come off can not drift out with water, this is a crown_interception; Behind the operation certain hour, because of the increase of head loss, need to carry out back flushing to the filter tank, the suspended substance of holding back with release also upgrades microbial film, and this is a backwash process.

Experimental results show that this O-A-O type BAF that the utility model provides, its denitrogenation can the common BAF denitrogenation of force rate ability exceed more than 15%, and dephosphorization efficiency by using is higher more than 14% than common aerating filter.

This O-A-O type BAF that the utility model provides, former water is pressed into by one-level filter column bottom, adopts upflowing to filter.Filter water outlet and flow into secondary filter column bottom anoxic section, after filtering by secondary filter column top water outlet water outlet by one-level filter column top water outlet.The aeration perforated pipe is installed in the secondary filter post filtering layer, causes when filtering that the leading portion filtering layer is an anoxic condition in the secondary filter post.Aerobic by one-level filter post, secondary filter post leading portion filtering layer anoxic, the O-A-O type BAF of the aerobic formation of back segment filtering layer.Aeration adopts the air compressor air feed, and gas is controlled tolerance by gas rotameter, filters post by the perforation plate water distribution, perforated pipe aerating regulation, and system support has a volume pump, and every grade has an aeration pump and under meter.

Be the better the purpose of this utility model that realizes, the carriage of two-stage upflowing filter post has removable pulley, but the supplier just moves.

Be the better the purpose of this utility model that realizes, also need regularly BAF to be carried out back flushing.The operation later stage that is accumulated in of the impurity such as SS owing to old biomembranously come off, in the sewage seriously influences treatment effect, needs carry out back flushing to filter material layer.The back flushing water source is a tap water, and backwashing water is up intake by the filter column bottom through spinner-type flowmeter, and the back flushing aeration carries out aeration by the air compressor air feed from the filter column bottom, and flushing waste water is discharged by the overflow port of filter column top.

The particulate filter that adopts in the utility model is the porous ceramic grain biofilter material, this porous ceramic grain biofilter material is commercially available, this filtrate has multiple advantage, as specific surface area be traditional filter material 4-6 doubly, be easy to biofilm, microorganism is difficult for running off, and also can not keep its bacterial classification even do not turn round for a long time; Collection filters, biology adsorbs and bio-oxidation is an one, and unit volume is disposed of sewage efficient raising 4-6 doubly; Tap density 1 gram/cubic meter greatly reduces the working cost of sewage disposal, reduces by 30% than traditional filter material working cost.This filtrate needs biofilm success, has the microbial film of some amount to start fast at short notice.Choose aerobic section length and anoxic segment length according to the water quality and quantity difference.When the treat effluent water quality deterioration, recover by the air water pulse backwashing, backwashing water is back to sewage lagoon.

Compared with prior art, the beneficial effects of the utility model are as follows:

(1). the nitrogen in the sewage there is removal preferably, can reaches reuse standard;

(2). the phosphorus in the sewage there is removal preferably, prevents the draining eutrophication, can reach reuse standard;

(3). have more considerable economy, aeration energy consumption is low.

(4). can keep stable water outlet effect by regulating different anoxic segment length to all kinds of waste water, see impact load, easy to use.

(5). volume is less, and is removable, and to handling community wastewater, water scenery sewage and public building sewage have the advantage of high-level efficiency less energy-consumption.

Description of drawings

Fig. 1 provides the equipment connection diagram of embodiment for the utility model;

Fig. 2 is the aeration perforated pipe structural representation among Fig. 1;

Fig. 3 is the water distribution perforation plate structural representation among Fig. 1.

Number in the figure is: 1. carriage, 2. supporting layer, 3. filtering layer (built-in biological filler), 4. under meter, 5. volume pump, 6. water inlet pipe, 7. one-level boring aeration pipe, 8. one-level filter post, 9. upflow tube, 10. pressure pump, 11. aeration pumps, 12. back flushing aeration pumps, 13. gasometer flask, 14. secondary boring aeration pipes, 15. secondary back flushing micropore aeration pipes, 16. secondary filter post, 17. upflow tubes, 18. secondary back flushing water inlet pipes, 19. one-level back flushing water inlet pipe, 20. pulleys, 21. water distribution perforation plates.

Embodiment

As Fig. 1～shown in Figure 3, this BAF mainly includes the filter post that is made of two-stage upflowing filter post, wherein one-level upflowing filter post 8 is the aerobic formula of aeration, the inlet segment of secondary upflowing filter post 16 is the anoxic section, secondary upflowing filter post 16 is an aerobic section near the water exit end filter tank, the bottom of described one-level upflowing filter post 8 is provided with fluid inlet, on the fluid inlet water distribution perforation plate 21 and one-level boring aeration pipe 7, be provided with supporting layer 2 on the one-level boring aeration pipe 7, be provided with the filtering layer 3 of built-in biological filler on the supporting layer 2, the bottom of one-level upflowing filter post 8 is provided with carriage 1, pulley 20 is arranged under the carriage 1, the top of one-level upflowing filter post 8 is provided with liquid outlet and overflow port 9, the bottom of described secondary upflowing filter post 16 is provided with fluid inlet, on the fluid inlet water distribution perforation plate 21 and secondary back flushing micropore aeration pipe 15, be provided with supporting layer 2 on the secondary back flushing micropore aeration pipe 15, be provided with the filtering layer 3 of built-in biological filler on the supporting layer 2, the middle part of this filtering layer 3 is provided with secondary boring aeration pipe 14, its top is provided with liquid outlet and overflow port 17, the liquid outlet at described one-level upflowing filter post 8 tops is connected by the fluid inlet of pipeline with secondary upflowing filter post 16 bottoms, the fluid inlet of described one-level upflowing filter post 8 bottoms also is connected with one-level back flushing water inlet pipe 19, and the fluid inlet of described secondary upflowing filter post 16 bottoms also is connected with secondary back flushing water inlet pipe 18.

Provide in the foregoing description at the utility model, aeration adopts aeration pump 11 and back flushing aeration pump 12 air feed, and gas is by gasometer flask 13 control tolerance, the filter post is by the perforation plate water distribution, perforated pipe aerating regulation, system support have a volume pump 5, and every grade has an aeration pump and under meter.

Working process of the present utility model is:

(1) filters

Close two-stage backwashing water water inlet pipe 19,18, enter the fluid inlet of one-level upflowing filter post 8 bottoms through under meter 4 by volume pump 5 suction sewage, by flowing through supporting layer 2 and one-level upflowing filter post 8 behind water distribution perforation plate 21 water distributions, go out stream and be depressed into the fluid inlet that the secondary upflowing is filtered post 16 bottoms at one-level upflowing filter post 8 top liquid outlets by pressure pump 10, upwards flow through filter, through the anoxic section and the aerobic section of regular length, by the 16 top water outlets of secondary upflowing filter post.The required dissolved oxygen of filter post internal reaction is provided by aeration pump 11, is controlled by supporting gasometer flask 13 with tolerance on it.

(2) back flushing

After treater work for some time, filtrate is because of being polluted, and filtration resistance increases, and need clean; Backwash tube is connected on the tap water, adopts combined water and air backwash, and institute's air demand is squeezed into the aeration perforated pipe that two-stage is filtered the column bottom by back flushing aeration pump 12 behind gasometer flask 13, and backwashing wastewater is back to sewage lagoon from upflow tube.

Claims

1, a kind of Combined desk is combined by table [1], chair [2], it is characterized in that:

A, table [1], the closed three-dimensional cabinet of chair [2] the combined integrated formation of energy, its desk [1] is made up of double-deck desktop [3], riser [9] and drawer [8], at upper tabletop [3] back side fluorescent lamp [4], mirror [5] and Die elektrische Zeituhr [6] are housed, and be fixed on lower floor's desktop [3] with hinge [7], upper tabletop [3] can be amounted to erect.

B, chair [2] are equipped with handrail [10], the seat two ends are equipped with drawer [11], universal wheel [12] is housed in pin side.