CN101786718B - Underground percolating water treatment plant and water treatment method applying same - Google Patents

Abstract

The invention relates to an underground percolating water treatment plant, comprising a water inlet pipe, a purified water outlet pipe, an aeration bucket and a filtering jar; wherein the aeration bucket and the filtering jar are buried underground, the filtering jar comprises a pressurized water pass room, a filter material layer and a water purification room from top to bottom; a decompression plate is arranged between the pressurized water pass room and the filter material layer, the side wall is communicated with the water inlet pipe, the top is communicated with a back washing discharge pipe, the lower part of the filter material layer is provided with a bearing filter plate; the middle of the filtering jar is fixed with a charging hole flange provided with an observing window, the bottom of the filtering jar water purification room is communicated with the aeration bucket, the aeration bucket is an umbrella top, the umbrella top is connected with an air inlet pipe and a cylinder which are symmetrical, the mouth part of the cylinder is connected with an air outlet pipe, the interior of the aeration bucket is provided with an aeration tube, the upper end of the aeration tube is provided with an aeration water separator, a water purification outlet pipe penetrates the aeration bucket to be communicated with the water outlet at the lower end of the aeration tube, the aeration tube is arranged at the center of the aeration bucket, annular space thereof forms the water purification room, and the upper end of the back washing discharge pipe and the interior of the water purification room are respectively provided with a water level sensing head. The invention has low delivery lift, high flow, low comprehensive cost and wide application field and is energy-saving and efficient.

Description

A kind of buried water from diffusion treatment unit and use the water treatment method of this device

Technical field

The invention belongs to the processing technology field of water, waste water or sewage, be specifically related to buried water from diffusion treatment unit and treatment process, be applicable to surface water, swimming-pool water, the water treatment of the water of travelling, reuse water, industrial circulate water etc.

Background technology

Today of modernization industry fast development; Improving constantly of people's living standard; Industry-by-industry and different field also significantly improve the usage quantity of water, and consequent secondary water pollution problems is also very serious, and the degree that has a strong impact on human survival has been developed in some area; For this reason, many experts of water treatment field and engineers are all constantly making great efforts to explore solution water pollution problems.

At present; Practical application or on probation in the involved water treatment device in fields such as surface water, swimming-pool water, the water of travelling, reuse water, industrial circulate water that is applicable to have: pressure-pot (sand cylinder), membrane filtration, air supporting mud-scraping machine and siphon automatically cleaning filter; Their effect characteristics are impurity and the obnoxious flavour that separates in the contaminated water; Make water be able to activation, and reach the purpose that purifies water by disinfectant sterilization algae removal.But in practical application, also expose different economy and problem on the effectiveness and defective.

Such as: pressure-pot (sand cylinder); Because this equipment is that former water is acted on filtrate through certain pressure, carry out the method for eliminating impurities, so the former water that can only solve slight pollution is (like swimming-pool water; Desire Chi Shui); Because of being prone to cause dirt to penetrate filter material layer after pressurizeing, increased the adhesion of dirt and filtrate and the effect of tangling of fiber for the water body of surface water (Ru He, lake, landscape water etc.) intermediate pollution simultaneously, the filtrate easy blocking is crashed; Some finely ground particles also are prone to pass filter material layer, and the water quality effect after the processing is also bad; And this equipment is because of no aeration performance, do not have activated water effectiveness; Because of pressure filtration consumes mass energy, also to want related drugs that former water is mixed simultaneously and doubt the doubtful effect of wadding, use cost is high.

Though the membrane filter method energy consumption is not excessive relatively, very easily stop up, often artificial cleaning or change filtering membrane; And can not carry out activation to water; Can only be applied on a small scale slight pollution (like swimming pool, desire pond, fountain water) field, the water reason of intermediate pollution is prone to stop up the drainage cycle is shortened, and frequent cleans or change filtering membrane; Owing to do not possess self-cleaning function; Also bring very inconvenience for operation maintenance management, also want related drugs that former water is mixed simultaneously and doubt the doubtful effect of wadding, use cost is high.

Air supporting mud-scraping machine facture needs mechanical aeration and machinery to draw together dirt, and energy consumption is big, and the functional failure of electromechanical rate is high, and work-ing life is short, and operation and maintenance cost is high, needs machine room, and the integration engineering construction cost is high.

Siphon automatically cleaning filter water treating method is to generally acknowledge better treatment process at present; But this method application apparatus volume high (high about 4.5-5.5 rice) because the isolated plant of this method need utilize the water colunm pressure and the barometric point of water, makes high locative preposition (being former water) aerating apparatus; Be open type with back flushing clean water tank and low level blowdown tank; And topology layout down in forming upward, must set up machine room in the application, increased the integration engineering cost; The water treatment system of its formation needs high requirement to the place apparatus addressing, especially under the condition of not having the construction machine room, can not get using; Remove this, the used filter device of this method is in practical application, owing to adopt the siphon principle back flushing; When time spent not for a long time, filtrate can make filter material surface form microbial film because of the residual microbial effect; When this microbial film stops up the filtrate gap water reach inceptive filtering and can not pass filtrate to clean water tank, under the situation of clean water tank lack of water, because of the reverse promotion filtrate of no water purification along filtering direction; The initial negative pressure that the siphon startup is produced when needing back flushing after can causing starting shooting is not enough to start backwash, will produce the recoil failure and former water is flowed out through the sewage backwash pipe naturally, the phenomenon of promptly metalling run out; Cause the equipment serviceability poor, instability.

Summary of the invention

The objective of the invention is in order to overcome the problems referred to above of prior art; A kind of buried energy-efficient water from diffusion treatment unit and method thereof are provided; It can be applied to water treatment field with buried mode; And realize having the characteristics of low lift and large flow rate by filtration procedure, thereby with more efficient energy-saving, lower comprehensive cost with make the water treatment system simple structure with gravity diafiltration method.Water treatment device of the present invention is used more flexible, and floor space is little, stable effluent quality, and the water quality problem of can solve surface water, swimming-pool water, the water of travelling, reuse water, industrial circulate water etc. being crossed by intermediate pollution, Application Areas is wide, and is widely applicable.

For realizing the object of the invention, adopt following technical scheme:

A kind of buried water from diffusion treatment unit comprises water inlet pipe, water purification rising pipe, aeration bucket and filtering jar, and the filtering jar side is provided with safeguards observation ward; It is buried that said aeration bucket, filtering jar and filtering jar safeguard that observation ward is; Be provided with filter material layer in the filtering jar, it is characterized in that filtering jar, be provided with the decompression plate between setting-out surge chamber and the filter material layer, the pressure buffer chamber sidewall is communicated with water inlet pipe from top to bottom for setting-out surge chamber, filter material layer and water purifying chamber; The top is communicated with the sewage backwash pipe, and the support filter plate is established in the filter material layer bottom; The filtering jar middle part is fixed with the feed port flange of band viewing window, and filtering jar bottom water purifying chamber opens a water purification water outlet and communicates with the aeration bucket, filtering jar sidewall and the handing-over of aeration bucket; The aeration bucket is the umbrella top, is connected with two symmetric inlet pipe on the conical surface plate on umbrella top, connects a cylinder in the middle of the conical surface plate; The cylinder oral area connects the T font escape pipe of a plate with cover, and aeration cylinder is equipped with in aeration bucket inside, and the aeration water segregator is equipped with in the aeration cylinder upper end; The water purification rising pipe passes the aeration bucket and is communicated with the water outlet of aeration cylinder lower end; Aeration cylinder places aeration bucket center, and its circular clearance forms water purifying chamber, and the level sensor head is housed respectively in the upper end of said sewage backwash pipe and the water purifying chamber.

Further, above-mentioned filtrate is two-layer at least composite filtering material layer.Particle diameter can increase to lower floor from the upper strata gradually, and filtrate adopts the laminate composite filter material that density is different, particle diameter is different, the different ore of effect is combined into, and satisfies different water conditioning requirements by certain proportioning.Not only but insoluble mikrobe in the filtered water is removed immobilized particles, can also remove bacterium or algae etc., thereby effectively increase water quality.

Further again, said aeration water segregator has the dished plate in some tanks hole for rule cutting or irregular cutting.

Said setting-out surge chamber is the one section cavity of internal diameter greater than the water inlet pipe caliber.

Said filtering jar is the 2-6 group, is symmetrically arranged in aeration bucket sidewall.

Another purpose of the present invention is to use the water treatment method of above-mentioned treatment unit:

(1) pending water gets into the pressure buffer chamber decompression through water inlet pipe, falls within the decompression plate through pressure buffer chamber bottom posticum;

(2) after the two-stage buffering of step (1), get into filtering jar and lean on gravity to permeate from filter material layer; Former water suspension is separated; Water purification gets into the water purifying chamber of filtering jar bottom, gets in homonymy aeration bucket and the formed water purifying chamber in aeration cylinder intermediate annular gap through the water purification water outlet;

(3) the water purification water level rises when crossing the aeration cylinder top; Water purification passes through by crossing the tank hole in the aeration water segregator; And the downward accelerated motion of gravity, impacting with the aeration cylinder bottom water surface, the waste gas in this moving process in the water divides the venting hole of device upwards to discharge from water aeration; And enter in the atmosphere through escape pipe, the air in the atmosphere sucks water purifying chamber through inlet pipe simultaneously;

(4) when the level sensor head detects the sewage backwash pipe and rises to designated water level; Start suction pump, suction pump with above the filtrate with surge chamber in the sewage reverse suction of press filtering direction, filtrate is expansion upwards; The levitated object that filter material layer is held back detaches filtering jar; Filtrate is able to clean and the water level in water purifying chamber drops to desired location, closes suction pump, and backwash process finishes.

Also comprise step in the above-mentioned treatment process: the water purification of aeration cylinder bottom adds 0.3 to 1mg/L chlorine residue ion through chemicals dosing plant chlorination sterilization algae removal, and water turbidity can be controlled in below the 0.4mg/L to 5mg/L.

Compare prior art water treatment device and method, beneficial effect of the present invention is:

(1) apparatus of the present invention compact overall structure, integral body can be embedded in underground, and construction is simple, and does not influence the layout of ground landscape.Apparatus of the present invention are buried the ground degree of depth and are not all 1.5 meters-2 meters according to Inlet and outlet water flow size; Sewage directly filters through filtering jar and need not preposition deposition; Owing to adopt run by gravity permeation filtration method; Dirt is located away from the filtrate top layer by natural mode in the water, and can not penetrate filtrate, therefore can not cause filtrate in long-time running, to adsorb dirt and stop up the deadlock phenomenon.Apparatus of the present invention adopt rearmounted aeration (the water purification aeration activation after promptly handling), utilize principle of hydrodynamics, through quickening the impact motion of water; And the surperficial contact area of increase water and air; Obnoxious flavour in the water (like band gas prefix material compositions such as ammonia nitrogen, two vaporized carbons, biogas) vaporization is overflowed be able to separate, make airborne oxygen absorbed (dissolved oxygen can reach more than the 10mg/L) simultaneously, make water be able to activation by water; Reach the effect of mechanical aeration, thereby increase water quality the aquatic foodsization transparency.The back flushing of this device is to detect automatically the amount of contaminants that filtrate cut through sewage backwash pipe water colunm pressure water level; And by the sewage extraction of suction power with filtrate top; This process makes filtrate top form negative pressure, simultaneously by the water purification that constitutes water purifying chamber between aeration cylinder and the aeration bucket (all in store water yield of treating back flushing when not moving for a long time) under its action of gravity, bottom filtrate, upwards promote filtrate along the opposite direction of filtering direction; When the gap moves upward between water purification is through filter material layer different-grain diameter filtrate; Form friction between water and the filtrate, thereby filtrate is upwards expanded, aspirated discharge when stirring the dirt on filtrate top layer; This process and suction power are to carry out synchronously and belong to enforceable; Lean on the kinetic energy of water to start the defective of the process water yields of losing of siphon so overcome the siphon back flushing more, also overcome the phenomenon that can not be activated under the different states in the siphonage and metal run out, therefore realize the reliable and stable operation fully.

In sum, the present invention has not only satisfied the dirt separation of water conditioning quality, and has realized the separation of waste gas in the water, and the aeration performance of no energy consumption is provided for water body simultaneously.Basic device of the present invention is that single cylinder is arranged, under the constant situation of aerating apparatus, multi-cylinder parallel integrated structure that can also the equal water treatment amount of parallel connection is to satisfy the requirement of bigger water treatment flow.This device is because of can buriedly being provided with; So the water treatment system pipe network path that is made up of it can become more simple and easy, the water inlet lift is lower, and the energy consumption under the equal flow is also very low; Can reduce the civil works cost of machine room in the practical application, therefore have good economic benefit.

(2) to filter the water yield big in the present invention, and filtration flow-rate is pressed single cylinder and combination thereof 30 to 40m/h, can satisfy the water treatment requirement of all kinds of different flows.

(3) because buried layout is placed near water body usually, and the water treatment system pipeline is short, and water resistance is little, realize the less energy-consumption effect of low lift and large flow rate; Construction costs significantly reduces.

(4) long service life, because of each parts in installing do not have mechanical driving member, no wear problem, filtrate is high hardness material, and being in operation does not almost have wearing and tearing, and apparatus main body is processed for the highstrenghtpiston, has very strong corrosion resistant weathering resistance, long service life; In water treatment procedure, only consume the lower electricity charge and chlorination expense basically, operation and maintenance cost is extremely low, is easy to apply.

Description of drawings

Fig. 1 is the buried water from diffusion treatment unit one exemplary construction synoptic diagram of the present invention;

Fig. 2 bows to diagrammatic sketch for buried water from diffusion treatment unit shown in Figure 1;

Fig. 3 is the cut-away section synoptic diagram of instance sewage backwash pipe of the present invention and filtering jar;

Aeration water segregator water-carrying section synoptic diagram in Fig. 4 instance 1 of the present invention;

Fig. 5 instance aeration of the present invention water segregator is bowed to diagrammatic sketch;

Fig. 6 is instance 2 four cylinder integrated structure synoptic diagram of the present invention.

Among the figure: the T font escape pipe of 1-aeration bucket, 11-aeration cylinder, 12-band cover plate, 13-inlet pipe, 14-cylinder, 111-aeration water segregator, 112-rising pipe, 2-filtering jar, 21-water inlet pipe, 22-pressure buffer chamber, 23-filter material layer, 24-water purifying chamber, 25-decompression plate, 26-feed port flange, 27-sewage backwash pipe, 28-support filter plate, 29-water purification water outlet, 3-safeguard see observation ward, 31-bung.

Among Fig. 6: sewage backwash pipe, the 3-1 that 2-1 is second filtering jar, 2-2 are the 3rd filtering jar, 2-3 are the 4th filtering jar, 21-1 are the water inlet pipe of second filtering jar, water inlet pipe that 21-2 is the 3rd filtering jar, 21-3 is the 4th filtering jar water inlet pipe, 27-1 is second filtering jar sewage backwash pipe, 27-2 is second filtering jar a sewage backwash pipe, 27-3 is the 3rd filtering jar second safeguards that observation ward, 31-1 second safeguard the bung of observation ward

Embodiment

Come the present invention is further specified below in conjunction with specific embodiment,

Embodiment 1

Referring to Fig. 1,2,3; Buried energy-efficient water from diffusion treatment unit; Comprise water inlet pipe 21, water purification rising pipe, aeration bucket and filtering jar; The filtering jar side is provided with safeguards observation ward, and it is buried that said aeration bucket, filtering jar and filtering jar safeguard that observation ward is, and aeration bucket, filtering jar and filtering jar safeguard that observation ward is that corrosion-resistant plastic is processed.

Have multilayer filter material layer 23 in the filtering jar 2, above-mentioned filtrate adopts the laminate composite filter material that density is different, particle diameter is different, the different ore of effect is combined into, and satisfies different water conditioning requirements by certain proportioning.Support filter plate 28 is arranged below the filtrate, and decompression plate 25 is arranged at filter material layer 23 tops, and decompression plate 25 tops are setting-out surge chamber 22, and pressure buffer chamber 22 sidewalls are communicated with water inlet pipe 21.

Filtering jar 2 tops are communicated with sewage backwash pipe 27, and filtering jar 2 middle parts are provided with the feed port flange 26 of band viewing window, lean on feed port flange 26 sides to safeguard with filtering jar handing-over one and see observation ward 3, and safeguarding that observation ward 3 is suitable for reading has bung 31 to supply to safeguard that entering check.

Filtering jar 2 bottoms are water purifying chamber; Water purifying chamber has water purification water outlet 29 and gets into aeration bucket 1; Aeration bucket 1 is that a shared sidewall is separated with the filtering jar handing-over; Be provided with aeration cylinder 11 in the aeration bucket 1, the circular clearance between aeration cylinder 11 and the aeration bucket 1 is the part of water purifying chamber, communicates with the bottom water purifying chamber of filtering jar 2.

The top of aeration bucket 1 is the type of falling the bucket, is symmetrical set two inlet pipe 13 on the conical surface plate of its upper end, and conical surface plate central authorities connect a cylinder 14, and cylinder 14 is suitable for reading to communicate with the T font escape pipe 12 with cover plate.

Aeration water segregator 111 is equipped with in aeration cylinder 11 upper ends, aeration bucket 1 and aeration cylinder 11 shape that is centrosymmetric, and intermediate space forms water purifying chamber, and the lower end of aeration cylinder 11 is provided with water purification rising pipe 112 and passes aeration bucket 1 and discharge water purification.

The first level sensor head 4 and the second level sensor head 41 are housed respectively in the upper end of sewage backwash pipe 27 and the water purifying chamber.

The buried water treatment device main body that bucket 3 is constituted is observed in aeration bucket 1, filtering jar 2 and maintenance; Aeration bucket 1, filtering jar 2 and safeguard that observation ward's 3 body height are consistent; Except that the T font escape pipe 12 of sewage backwash pipe 27, inlet pipe 13 and band cover plate is exposed at the ground, other part is all imbedded underground.

Referring to Figure 4 and 5; Aeration water segregator 111 is arranged the dished plate of several rules or anomalous water slotted eye; Fluidised form through changing water makes water fully contact with air, and in aeration cylinder 11, does gravity fall formation shock motion, thereby separates the waste gas in the water (like obnoxious flavoures such as ammonia nitrogen, carbonic acid gas, biogas); Simultaneously soluble in water oxygen, make water reach abundant activatory purpose.

Use a kind of water treatment method of above-mentioned buried energy-efficient water from diffusion treatment unit, may further comprise the steps:

(1) pending former water is after water inlet pipe 21 gets into pressure buffer chamber 22 decompressions; Drop on the decompression plate 25 through pressure buffer chamber 22 bottom posticum gravity; After the two-stage buffering, get into the filter material layer of filtering jar; Setting-out surge chamber 22 is one section and compares the big container of water inlet pipe internal diameter that moment can be discharged into water pressure;

(2) pass through filter material layer 23 by gravity leakage, former water suspension is separated, water purification gets into filtering jar bottom water purifying chamber 24, gets in homonymy aeration buckets 1 and the formed water purifying chamber of aeration cylinder 11 intermediate space through water purification water outlet 29;

When (3) surpassing aeration cylinder 11 tops along with the rising of water purification water level; Water purification just changes fluidised form by crossing the tank hole in the aeration water segregator 111, increases water and air contact area and the downward accelerated motion of gravity, impacts with the aeration cylinder 11 bottom waters surface; Water can produce air pressure in the process when overcoming atmospheric drag because water moves downward; This air pressure will upwards be discharged the waste gas in this moving process water from aeration water segregator 111 intermediate exhaust holes in the lump, and enter in the atmosphere through the T font escape pipe 12 of band cover plate, also can produce negative pressure when the water in this process moves downward; Air in the atmosphere is sucked water purifying chamber through inlet pipe 13, thereby form cross-ventilated process.

(4) back flushing, at above filtration procedure, the levitated object of holding back when filter material layer surpasses when a certain amount of; The osmotic resistance of water strengthens, and water level is risen through sewage backwash pipe 27 form the water colunm pressure of equivalent, and this pressure is controlled in the set(ting)value that does not change the effluent quality requirement; Adopt the first level sensor head 4 to detect for this reason; When this water level reaches the first level sensor head 4, just begin to start suction pump, suction pump with above the filtrate with surge chamber in the sewage reverse suction of press filtering direction, this moment filtrate under the gravity of water purifying chamber and barometric point the while acting in opposition in filtrate; Filtrate is upwards expanded; Detach filtering jar to the levitated object of being held back, filtrate is able to clean and the water level in water purifying chamber when dropping to the predeterminated position of second sensing head 41, closes suction pump; Backwash process finishes, and gets into the cycle operation state of next round filtration and back flushing.

The above a kind of buried energy-efficient water from diffusion treatment unit and method thereof, the water body loop cycle that is processed in water treatment applications is set by the different quality standard-required, and controls through the water pump electric control system.Water purification after the processing is through the chemicals dosing plant chlorination; Make bacterium residual in the water and frustule be able to kill, and make and keep 0.3 to 1mg/L residual chlorine amount in the water body, so just guaranteed that water quality never degenerates within a certain period of time; The water quality transparency can reach the degree of depth more than 1.5 meters, and water quality is respond well.

Through the experiment proof; Apparatus of the present invention are to the treatment effect highly significant of surface water, rainwater, industrial circulating water, swimming pool water, meet or exceed country's " water environment quality standard " GB3838-2002II class and drinking water sanitary standard GB5749-2006 by the water quality requirement of practical application.

Embodiment 2

Different with embodiment 1 single cylinder filtration is, present embodiment can carry out parallel connection with a plurality of filtering jars under the constant situation of aeration bucket, be combined into the multi-cylinder structure that satisfies the different flow requirement, below is described further with the technical scheme of four cylinders combination.

The water treatment device of this multi-cylinder combination comprises four identical embodiment 1 single cylinders; Four filtering jars are symmetry and the handing-over of aeration bucket; Wherein per two single cylinders join in the same observation ward that safeguards; The water inlet pipe of four filtering jars respectively connects an electrically operated valve, and the other end of electrically-controlled valve is connected to public water inlet pipe, and the level sensor head mutual dislocation of four filtering jar sewage backwash pipe upper ends is not on same sea line.

Use the water treatment method of the water treatment device of present embodiment multi-cylinder combination, comprise the steps:

1, pending former water is distributed to four filtering jars respectively through four electrically-controlled valve; The handled water purification of step through the said method of above-mentioned single cylinder is pooled in aeration bucket 1 and the formed water purifying chamber of aeration cylinder 11 intermediate space, and by the step of the said method of above-mentioned single cylinder water purification is flowed out from rising pipe.

2, the level sensor head of the upper end of the sewage backwash pipe on four single cylinders dislocation by the preferred backwash order of nonsynchronous priority backwash requirement separately, is closed the single cylinder water inlet electrically-controlled valve of not backwash simultaneously automatically through electric control gear, make four cylinders guarantee the uniqueness of backwash.

The foregoing description is an one of which embodiment of the present invention, but does not limit the invention to these embodiments.One skilled in the art would recognize that the present invention contained in claims scope all alternativess, improvement project and the equivalents that possibly comprise.Based on spirit of the present invention, multiple variation is also arranged, all should be in the claim of application of the present invention.

Claims (7)

1. buried water from diffusion treatment unit; Comprise water inlet pipe (21), water purification rising pipe, aeration bucket and filtering jar, the filtering jar side is provided with safeguards observation ward, and it is buried that said aeration bucket, filtering jar and filtering jar safeguard that observation ward is; Be provided with filter material layer in the filtering jar; It is characterized in that filtering jar is setting-out surge chamber (22), filter material layer and water purifying chamber from top to bottom, be provided with decompression plate (25) between setting-out surge chamber (22) and the filter material layer, the pressure buffer chamber sidewall is communicated with water inlet pipe (21); The top is communicated with sewage backwash pipe (27), and support filter plate (28) is established in the filter material layer bottom; Filtering jar (2) middle part is fixed with the feed port flange (26) of band viewing window, and filtering jar bottom water purifying chamber opens a water purification water outlet (29) and communicates with the aeration bucket, filtering jar sidewall and aeration bucket (1) handing-over; Aeration bucket (1) is the umbrella top; Be connected with two symmetric inlet pipe (13) on the conical surface plate on umbrella top, connect a cylinder (14) in the middle of the conical surface plate, the cylinder oral area connects the T font escape pipe (12) of a plate with cover; Aeration cylinder (11) is equipped with in aeration bucket inside; Aeration water segregator (111) is equipped with in the aeration cylinder upper end, and water purification rising pipe (112) passes the aeration bucket and is communicated with the water outlet of aeration cylinder lower end, and aeration cylinder places aeration bucket center; Its circular clearance forms water purifying chamber, in the upper end of said sewage backwash pipe (27) and the water purifying chamber level sensor head is housed respectively.

2. buried according to claim 1 water from diffusion treatment unit is characterized in that said filtrate is two-layer at least composite filtering material layer.

3. like the said buried water from diffusion treatment unit of claim 2, it is characterized in that said aeration water segregator (111) has the dished plate in some tanks hole for rule cutting or irregular cutting.

4. like the said buried water from diffusion treatment unit of claim 3, it is characterized in that said setting-out surge chamber is the one section cavity of internal diameter greater than the water inlet pipe caliber.

5. like the said buried water from diffusion treatment unit of claim 2, it is characterized in that said filtering jar is the 2-6 group, is symmetrically arranged in aeration bucket sidewall.

6. the water treatment method of the buried according to claim 1 water from diffusion treatment unit of application is characterized in that comprising the steps:

(1) pending water gets into the pressure buffer chamber decompression through water inlet pipe, falls within the decompression plate through pressure buffer chamber bottom posticum;

(2) after the two-stage buffering of step (1), get into filtering jar and lean on gravity to permeate from filter material layer; Former water suspension is separated; Water purification gets into the water purifying chamber of filtering jar bottom, gets in homonymy aeration bucket and the formed water purifying chamber in aeration cylinder intermediate annular gap through the water purification water outlet;

(3) the water purification water level rises when crossing the aeration cylinder top; Water purification passes through by crossing the tank hole in the aeration water segregator; And the downward accelerated motion of gravity, impacting with the aeration cylinder bottom water surface, the waste gas in this moving process in the water divides the venting hole of device upwards to discharge from water aeration; And enter in the atmosphere through escape pipe, the air in the atmosphere sucks water purifying chamber through inlet pipe simultaneously;

(4) when the level sensor head detects the sewage backwash pipe and rises to designated water level; Start suction pump, suction pump with above the filtrate with surge chamber in the sewage reverse suction of press filtering direction, filtrate is expansion upwards; The levitated object that filter material layer is held back detaches filtering jar; Filtrate is able to clean and the water level in water purifying chamber drops to desired location, closes suction pump, and backwash process finishes.

7. water treatment method as claimed in claim 6, the water purification that it is characterized in that also comprising the aeration cylinder bottom is through chemicals dosing plant chlorination sterilization algae removal.

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