CN109592787A

CN109592787A - A kind of efficient denitrification filters sewage water treatment method ecologically

Info

Publication number: CN109592787A
Application number: CN201910056690.5A
Authority: CN
Inventors: 马金龙
Original assignee: Hunan Zhong Ke Green Technology Co Ltd
Current assignee: Hunan Zhong Ke Green Technology Co Ltd
Priority date: 2019-01-22
Filing date: 2019-01-22
Publication date: 2019-04-09

Abstract

The present invention discloses a kind of efficient denitrification and filters sewage water treatment method ecologically, comprising: raw sewage carries out lower infiltration processing through underground diafiltration module downwards while horizontal plane direction is spread and flowed from different height respectively through multilayer aproll layer arranged up and down；A part of raw sewage enters underground diafiltration module through aproll layer, and another part raw sewage enters the carbon source layer below diafiltration module located underground after aproll layer；Raw sewage enters reaction zone through carbon source layer and reacts with being seeped treated sewage under the diafiltration module of underground and carry out denitrification denitrogenation；The collection water layer that water after reaction passes through positioned at the reaction zone bottom is discharged.It solves and passively introduces the problems such as low nitric efficiency caused by carbon source, load and anti-blocking ability decline in the prior art, improve nitric efficiency, improve load and anti-blocking ability, the present invention reacts combination with biofilter carbon source layer denitrification denitrogenation by the way that subsurface wastewater infiltration system actively to be introduced to carbon source and eliminates blocking, realizes the coupling synergistic effect between underground diafiltration module and biofilter processing unit.

Description

A kind of efficient denitrification filters sewage water treatment method ecologically

Technical field

The present invention relates to technical field of sewage, especially a kind of efficient denitrification gas filters sewage water treatment method ecologically, This method is mainly used for the processing of sanitary sewage, country sewage, rainwater and low-concentration organic waste water.

Background technique

In Chinese 1,300,000,000 populations, there is 70% Drinking Water, there is a city more than 400 to be with underground water more than 660 in a city Drinking water source.But it is introduced that, the urban groundwater in the whole nation 90% has been contaminated, and one group of data also shows underground water front Face severe challenge.2011,9 provinces and cities such as Beijing, Shanghai to 857 local monitoring wells carried out evaluating water quality be I class, The monitoring well accounting 2% of II class, and IV class, the monitoring well of V class up to 76.8%；Water pollution situation is constantly aggravated, so that sewage Processing and regeneration industry are by unprecedented concern.

Underground is percolated sewage treatment facility, and to take up little area and not need, land reserve zone, investment is small, operating cost is very low, maintenance Manage simplicity, high treating effect, it is stable, without secondary pollution, can normal operation, using flexible under cryogenic conditions in winter Many advantages, such as and be widely used.It is to spread to sewage by being embedded in the water spraying pipe of underground that underground, which is percolated sewage treatment process, In the Artificial Soil of certain area, while sewage is percolated downwards from top aeration zone, pollutant therein passes through in the soil to be cut Stay, adsorb and microorganism decomposition and conversion and remove, the soil on filtration system can be used as greenery patches, nonirrigated farmland, parking lot etc..

Documents 1: notification number is that the patent document of CN102432105B discloses a kind of high-efficient denitrification and dephosphorization underground infiltration Filter sewage water treatment method, include the following steps: raw sewage through the area Xia Shen infitration process processing after to the bottom guide layer, Guide layer enters the area Shang Shen, and the area Zai Jingshangshen is discharged across except phosphorous layer, and respectively from the first outlet pipe and second in upward diafiltration The final discharge of pipe；Wherein, the area Xia Shen carries out multilayer union aproll, the original that the bottom enters into raw sewage respectively using upper and lower multilayer Sewage provides carbon source for anti-nitration reaction.The system is three layers of water inlet or water distribution simultaneously, wherein first and second layer is diafiltration.Third Layer lower coarse filtering layer 22 is direct carbon source water distribution, and denitrifying capacity is high.

Documents 2: processing method disclosed in the patent document of Publication No. CN103641270 B uses diversion pipe pair Second layer water distribution, and using more flow tube outflow is raw sewage, carbon source is provided as anti-nitration reaction, only instantly at anti-blocking layer In it is wet/do in bigger situation, sewage is possible to more flow；In the early stage of system operation, almost all of sewage is in height Diafiltration penetrates anti-blocking layer in the diafiltration module of load underground, and the pollutant burden that lower anti-blocking layer is born is very low.In pollutant In the biggish situation of load, with the operation of system, the permeability of upper anti-blocking layer will be gradually decreased, and be entered by vertical diversion pipe The sewage of secondary water spraying pipe from scratch, gradually increases.After running a period of time, upper anti-blocking layer is up to sludge balance, at this time Newly-increased sludge quantity is equal with the sludge quantity of microorganism decomposition daily in this layer, and the sewage quantity that diafiltration daily penetrates anti-blocking layer is basic Stablize, thus is also tended towards stability by the sewage quantity that vertical diversion pipe enters secondary water spraying pipe.Due to lower anti-blocking layer structure with Upper anti-blocking layer is consistent, to increase the filtration area of underground diafiltration module, and enters the water and pollutant of secondary water spraying pipe Load will be automatically adjusted by system, and the load-bearing capacity of underground diafiltration module can be improved.

Though documents 1 are a kind of mode of active supplementary carbon source, despite the presence of above-mentioned condition, occupied area compared with Greatly.But due to the not set water conservancy diversion pipe network of the system, do not have anti-gambling function.During long-term heavy-duty service, system Wet/dry ratio gradually increase, there is the risk being blocked in filtration system.In order to guarantee to operate normally work, generally not in sludge Critical state operation is balanced, reduction inflow can only be leaned on, reduces load to maintain system to operate normally.The area Xia Shen is joined using three floor Water inlet-air inlet is closed, raw sewage is shunted in upper, middle and lower-ranking in the ratio of 3:2:2；Middle layer air inlet, make upper layer aproll layer and Filtrate between lower layer's aproll layer keeps aerobic environment；Upper layer and middle layer are made of fine filtering layer and filter bed of essence, and lower layer is coarse filtration layer. Lower layer is coarse filtration layer, is mainly made of the gravel that partial size is 5~20 millimeters.Raw sewage enters lower layer's aproll via lower layer's water spraying pipe Layer is percolated downwardly together after mixing with diafiltration to this water rich in nitrate nitrogen enters aerobic-anaerobic alternate area, provides for anti-nitration reaction Carbon source, ensure that the good denitrification ability of system has the following problems: (1) being not provided in the filtering layer in upper layer and middle layer vertical Water conservancy diversion pipe network system and more stream pipe network system, equally exist the lower problem of sludge balance critical value, on Practical Project, in order to Ponding blockage problem is avoided, load can only be reduced, actually fails to give full play to treatment effeciency.(2) there is oxygen supply in middle layer ventilation Gradient.

Documents 2 are a kind of mode of passive supplementary carbon source, and this requires the lower anti-blocking layers in documents 2 in system It is in a saturated state always in operational process, it is otherwise unable to complete infiltration or can not more flow；Theoretical and experimental study proves, is Wet/dry ratio of system is bigger, and the blocked risk of filtration system is higher, therefore, instantly aproll layer and lower anti-blocking layer be chronically at it is wet/ Do it is bigger in the case where, the plugging performance of lower aproll layer and lower anti-blocking layer reduces；The denitrifying capacity of system is weaker, and then leads Cause the removal rate of TN (total nitrogen) lower, such as in documents 2, lower anti-blocking layer 35 (actually playing percolation) once blocks, Although the sewage for being gathered in aproll layer 34 can be flowed directly out from overflow pipe OP into 41 water distribution areas, do not blocked in system surfaces, Actual conditions are: only upper anti-blocking layer 33 (actually also playing percolation) is in aerobic state, and lower anti-blocking layer 35 cannot do work, The processing capacity of system substantially reduces, and a large amount of raw sewage is directly entered water distribution area, can exceed that needed for anti-nitration reaction Amount, therefore, the anti-nitration reaction of system cannot proceed normally, and cannot be removed effectively TN (total nitrogen), eventually leads to system crash, be It avoids above-mentioned condition generation that from can only leaning on reduction inflow, reduces load to maintain system to operate normally.

On the other hand, microorganism present in raw sewage can provide carbon source for anti-nitration reaction, and in documents 1 Raw sewage into the area Shang Shen have passed through infiltration processing, most of microorganism under at least one layer of filter through the area Xia Shen first and be filtered out, Therefore the carbon source amount that the sewage into the area Shang Shen is capable of providing is few, causes the denitrifying capacity of system not high, same problem It exists in documents 2, in the early stage of system operation, because head of the secondary water spraying pipe in water inlet is not achieved more The height of flow tube, no denitrification；More there are a sludge balance critical values for stream.Only when water inlet contaminant capacity is greater than or equal to When critical value, just there is more miscarriage life.Otherwise, it is easy to go wrong, in practice it has proved that and so；When water inlet contaminant capacity is less than critical When value, more streamflow reduction is directly resulted in, or even due anti-nitration reaction therefore is not achieved without flowing water is got over.In high load capacity item Under part under longtime running system condition, sludge balance critical value changes with water inlet contaminant capacity, especially because actual sewage Contaminant capacity be variation, when process requirements amount is not achieved there are certain water, more stream will reduce even without, and be difficult into Pedestrian is control and adjustment, and therefore, the denitrifying capacity of system is weaker, causes the removal rate of TN (total nitrogen) lower.Treatment effeciency Lower.For anti-gambling, it is necessary to by water inlet contaminant capacity control in sludge balance critical value range, therefore, system processing certainly will be influenced Efficiency increases the difficulty of control.It is generally 3:2 by the ratio of upper and lower level filter layer raw sewage sendout.Therefore, sewage treatment Measure relatively low, efficiency is also low, processing capacity: sewage occupied area per ton is 1.5 square metres.

Documents 2 are more flowed in the early stage of system operation because head of the secondary water spraying pipe in water inlet is not achieved The height of pipe, no denitrification；More there are a sludge balance critical values for stream.Only face when water inlet contaminant capacity is greater than or equal to When dividing value, just there is more miscarriage life.Otherwise, it is easy to go wrong, in practice it has proved that and so；When water inlet contaminant capacity is less than critical value When, more streamflow reduction is directly resulted in, or even due anti-nitration reaction therefore is not achieved without flowing water is got over.In high-load condition Under lower longtime running system condition, sludge balance critical value changes with water inlet contaminant capacity, especially because actual sewage is dirty Dye amount is variation, there are certain it is primary or certain process requirements amount is not achieved in water several times when, more stream will reduce even without, and Be difficult to carry out other artificial controls and adjustment, therefore, the denitrifying capacity of system is weaker, cause the removal rate of TN (total nitrogen) compared with It is low.In order to anti-blocking, it is necessary to by water inlet contaminant capacity control in sludge balance critical value range, therefore, system processing effect certainly will be influenced Rate increases the difficulty of control.It is generally 3:2 by the ratio of upper and lower level filter layer raw sewage sendout.Therefore, sewage load Relatively low, efficiency is also low, processing capacity: handling sewage per ton to need occupied area is 1.5 square metres.

The problem of filtration system is most worried is blocking.The diafiltration of high load capacity underground is even more so.High load capacity underground diafiltration technique Process is generally such that water distribution (such as: 30min), divulges information (such as: 60min after termination of pumping) after a period of time, divulges information for the first time again (such as: 60min after divulging information for the first time).One most critical is most important to be required to be that anti-blocking layer cannot have ponding.It should still be noted that It is that filter layer (i.e. anti-blocking layer) is using sand, generally river sand, and construction and installation aproll layer is by artificial behaviour on filter layer Make, many hollows can be left in filter layer top surface, such as foot steps on the hole to be formed, and will be the ground for being easiest to ponding at these hollows Side.If these ponding are not excluded, it is meant that the oxygenation of ponding part is difficult, and pollutant cannot be dropped by aerobic microbiological Solution, this part will become anaerobic environment state and just have once being formed and develop into increasing trend, eventually lead to entire system System collapse.

In documents 2: being equipped with the vertical water conservancy diversion across upper anti-blocking layer between an aproll layer and secondary aproll layer Pipe；The height of the vertical diversion pipe top nozzle is consistent with the top surface of upper anti-blocking layer.The function of vertical diversion pipe is mainly two The water distribution of secondary aproll layer；Has effects that the ponding for falling the apical side height for doing anti-blocking layer simultaneously.But it can not rule out hollow place Ponding.In addition, burying once water spraying pipe in an aproll layer, secondary water spraying pipe is embedded in the secondary aproll layer； Ventilating layer (ventilation duct) is arranged under lower anti-blocking layer.In the presence of ventilation for oxygen gradient, and may large area ponding by lower anti-blocking layer Influence: the secondary water spraying pipe by get over flow tube and advanced treatment unit water inlet pipe connect, drainpipe and the depth of catchmenting Spend the water inlet pipe connection of processing unit.The highest point position for getting over flow tube is 5-lOcm higher than secondary water spraying pipe.Entire sewage treatment Process be it is such, first upper anti-blocking layer gradually blocks, because inflow is more.What is be arranged in upper anti-blocking layer has vertical draft tube straight It taps into the water spraying pipe of secondary aproll layer.It should be noted that upper anti-blocking layer is not provided with more flow tube, thus, there is no The more more and more situation of flow.With the continuation of operation, by one section of Shi Hou, lower anti-blocking layer is gradually blocked, and is not had by There is more miscarriage life, no raw sewage is directly entered water distribution area, i.e., this stage raw sewage has neither part nor lot in anti-nitration reaction；Under finally Anti- blocking layer blocking, more flow is more and more, until reaching maximum processing load.Obviously, that there are sludge balances is critical for lower anti-blocking layer It is worth lower problem.It is emphasized that more flow tube highest point tube bottom absolute altitude is higher than secondary water spraying pipe 5-10cm, more flowed when having When, the depth of accumulated water more than the water pump stop timing, lower anti-blocking layer top surface should be greater than the diameter of secondary water spraying pipe plus 5- 10cm.When divulging information first time, all ponding preferably all complete by diafiltration, cannot be there are also ponding when divulging information for the second time.Otherwise, Local anaerobic environment easy to form.Block in order to prevent, under anti-blocking Layer assignment water will be less than upper anti-blocking layer, in Practical Project On, it needs there are sizable leeway, it is understood that the remaining water of blocked state is wanted to fall the diameter for doing secondary water spraying pipe in 3 hours In addition the ponding of 5-10cm depth is very difficult thing.Load absolutely cannot be big, and therefore, lower anti-blocking layer fails to give full play to Treatment effeciency.In addition, there is the variation of sewage water in reality, when sewage quantity is few, it is understood that there may be get over without raw sewage Stream enters reaction zone situation, i.e., participates in anti-nitration reaction without raw sewage.

Summary of the invention

The present invention provides a kind of efficient denitrification and filters sewage water treatment method ecologically, for overcoming nitric efficiency in the prior art The defects of lower, filtration system is easily stifled realizes active supplementary carbon source, improves denitrifying capacity and nitric efficiency, reduces diafiltration system System blocking risk.

To achieve the above object, the present invention proposes that a kind of efficient denitrification filters sewage water treatment method ecologically, comprising:

Step 1, raw sewage spreads respectively in horizontal plane direction from different height through multilayer aproll layer arranged up and down and flows While carry out lower infiltration processing through underground diafiltration module downwards；Underground diafiltration module includes multilayer filter layer, the filter layer with The aproll layer is alternately arranged；

Step 2, a part of raw sewage enters in lower infiltration treatment process after each aproll layer and is located at below the aproll layer Filter layer, several vertical carbon sources of another part raw sewage through the filter layer below the aproll layer after each aproll layer are anti-blocking Pipe is directly entered the carbon source layer below diafiltration module located underground or imports the aproll layer below the aproll layer；Each diafiltration layer surface And internal sewage imports lower layer's aproll layer through the vertical carbon source pipe-blocking-proof or is introduced directly into the carbon source layer；

Step 3, raw sewage through carbon source layer enter reaction zone with seeped under the diafiltration module of underground treated sewage carry out it is anti- Nitrify denitrification reaction；

Step 4, for water level more than the part overflow of carbon source layer, the water after reaction, which passes through, is located at the reaction zone bottom in reaction process The collection water layer in portion is discharged.

The present invention provides a kind of efficient denitrification and filters sewage water treatment method ecologically, and raw sewage is by multilayer aproll layer in aproll Layer horizontal plane side be while flow up, and flows downwardly into underground diafiltration module (including multilayer and aproll below each aproll layer The filter layer that layer is alternately arranged and the filter bed of essence positioned at the bottom) it is filtered, particulate organic matter is intercepted, bulky grain organic matter is most It is decomposed eventually by bio-contact oxidation, the raw sewage for not being in time for diafiltration is introduced directly into carbon source layer, underground diafiltration after aproll layer Sewage afterwards mixed with raw sewage through carbon source layer after reaction zone carry out denitrogenation, on the one hand provided for the anti-nitration reaction of reaction zone Carbon source, on the other hand, the convenient filter bed of essence bottom above carbon source layer set return pipe, by installing valve adjustment on return pipe Saturation height is built aerobic zone and is replaced with anaerobic zone, guarantees going on smoothly for anti-nitration reaction, and automatic feedback is adjustably lower to be seeped The sewage load for filtering unit makes the wet/dry than keeping basicly stable of underground diafiltration module, prevents organic matter accumulation from causing system stifled Plug；The present invention becomes passive and introduces carbon source actively to introduce carbon source, and carbon source introducing speed is fast and enough, and raw sewage is almost without process The processing of filter layer in the diafiltration module of underground, therefore content of organics is higher, can be the anti-nitre of biological filter unit reaction zone To change reaction and sufficient carbon source is provided, and then improves nitric efficiency, system operation just has anti-nitration reaction, stable progress always, and The introducing of carbon source is not influenced by inflow, and improves the load-bearing capacity and anti-blocking ability of system.

The mode of carbon source is passively provided relative to existing overflow, this programme passes through several vertical carbon through each filter layer Source pipe-blocking-proof, the raw sewage that on the one hand can actively feed high organic content carry out anti-nitration reaction, another party as carbon source Face can be improved the anti-blocking ability of each filter layer, after system reaches equilibrium state, the ponding energy of filter layer surface imperfection depression side Next aproll layer or carbon source layer are enough imported by vertical carbon source pipe-blocking-proof, extra water can pass through when crossing carbon source layer Overflow hole or overflow pipe overflow are again introduced into aproll layer into cesspool.Therefore in this programme each filter layer sludge balance Critical value is not much different, kept in balance, thus overboard process be quite smoothly, and in the scheme of the prior art under it is anti-blocking For layer due to providing carbon source using overflow manner, itself is unable to water conservancy diversion, can only wait water fall it is dry after just can be carried out aerobic reaction, a side Face anti-blocking performance substantially reduces, and another aspect sludge balance critical value is significantly less than anti-blocking layer, and this programme is relative to existing skill Art substantially reduces the overboard time, improves sewage treating efficiency.

Detailed description of the invention

In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with The structure shown according to these attached drawings obtains other attached drawings.

Fig. 1 is the flow chart that the efficient denitrification that inventive embodiments provide filters sewage water treatment method ecologically；

Fig. 2 is the process flow chart that the efficient denitrification that inventive embodiments provide filters sewage water treatment method ecologically；

Fig. 3 is that the efficient denitrification that inventive embodiments provide filters water-flow equation schematic diagram in sewage water treatment method ecologically；

Fig. 4 is that the efficient denitrification that inventive embodiments provide filters air flow method schematic diagram in sewage water treatment method ecologically；

Fig. 5 is that the efficient denitrification that inventive embodiments provide filters each process facility arrangement signal in sewage water treatment method ecologically Figure.

The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its His embodiment, shall fall within the protection scope of the present invention.

It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute is only used in the embodiment of the present invention In explaining in relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, if should When particular pose changes, then directionality instruction also correspondingly changes correspondingly.

In addition, the description for being such as related to " first ", " second " in the present invention is used for description purposes only, and should not be understood as Its relative importance of indication or suggestion or the quantity for implicitly indicating indicated technical characteristic.Define as a result, " first ", The feature of " second " can explicitly or implicitly include at least one of the features.In the description of the present invention, " multiple " contain Justice is at least two, such as two, three etc., unless otherwise specifically defined.

In the present invention unless specifically defined or limited otherwise, term " connection ", " fixation " etc. shall be understood in a broad sense, For example, " fixation " may be a fixed connection, it may be a detachable connection, or integral；It can be mechanical connection, be also possible to Electrical connection；It can be directly connected, the connection inside two elements or two can also be can be indirectly connected through an intermediary The interaction relationship of a element, unless otherwise restricted clearly.It for the ordinary skill in the art, can basis Concrete condition understands the concrete meaning of above-mentioned term in the present invention.

It in addition, the technical solution between each embodiment of the present invention can be combined with each other, but must be general with this field Based on logical technical staff can be realized, it will be understood that when the combination of technical solution appearance is conflicting or cannot achieve this The combination of technical solution is not present, also not the present invention claims protection scope within.

The present invention proposes that a kind of efficient denitrification filters sewage water treatment method ecologically.Filter sewage treatment side in ground in the present invention Method is suitable for underground diafiltration bed and biological filter bed.

Embodiment one

Please refer to Fig. 1~3, the present invention filters sewage water treatment method with providing a kind of efficient ecological, comprising:

Step S1, raw sewage spread respectively in horizontal plane direction from different height through multilayer aproll layer arranged up and down and flow While carry out lower infiltration processing through underground diafiltration module downwards；Underground diafiltration module includes multilayer filter layer, the filter layer with The aproll layer is alternately arranged；

Referring to Fig. 5, raw sewage is laggard through the grid precipitating removal granule sludge and anaerobic pretreatment of sewage pretreatment tank 100 Enter sewage and adjust distributing reservoir 200,201 timing of submersible sewage pump that distributing reservoir 200 is adjusted by being placed in sewage is conveyed to be percolated into underground Unit 300, underground diafiltration module 300 use multilayer union aproll to raw sewage, and most of pollutant is gone in infitration process It removes.Referring to Fig. 3, underground diafiltration module uses three layers of joint water distribution, and raw sewage is in the first aproll layer 303,305 and of the second aproll layer Third aproll layer 307 is shunted in the ratio of 1:1:1；Underground diafiltration module 300 from top to bottom successively include coating 301, Root resistance-sealant 302, the first aproll layer 303 (the embedded first water distribution-cloth gas-bearing formation 303a in inside), the first filter layer 304, second Aproll layer 305 (inside embedded second water distribution-cloth gas-bearing formation 305a), the second filter layer 306, (inside embedded the of third aproll layer 307 Three water distributions-cloth gas-bearing formation 307a), third filter layer 308, filter bed of essence 309；Raw sewage passes through the first water distribution-cloth gas-bearing formation 303a, second Water distribution-cloth gas-bearing formation 305a, third water distribution-cloth gas-bearing formation 307a are to the first filter layer 304, the second filter layer 306, third filter layer 308 and filter bed of essence 309 is lower seep during in the first water distribution-cloth gas-bearing formation 303a, the second water distribution-cloth gas-bearing formation 305a, third water distribution- Horizontal plane vertical spread flowing where cloth gas-bearing formation 307a is covered with entire layer and the first aproll layer 303, the second aproll layer 305 and the Three aproll layers 307；

Preferably, referring to fig. 2, the step 1 includes:

Step 11, the preprocessed unit of raw sewage (sewage pretreatment tank 100) is pre-processed；

Step 12, enter sewage by pretreated sewage and adjust distributing reservoir 200；

Step 13, each horizontal water distribution pipe network of layer (i.e. the first water distribution-cloth gas-bearing formation 303a, the are sent into through conveying equipment is intermittent Two water distributions-cloth gas-bearing formation 305a, third water distribution-cloth gas-bearing formation 307a)；

Step 14, upward, downward and two sides radially flow through each aproll layer to raw sewage respectively from the outside to the core；

Step 15, a part of raw sewage penetrates into and each spaced apart filter layer of aproll layer from each aproll layer；

Step 16, filter bed of essence is entered after lower layer's filter layer and carries out refined filtration.

Sewage transport equipment includes sewage pump etc., for sewage to be adjusted to the sewage in distributing reservoir 200 through horizontal water distributor Net is transported to each aproll layer, when aproll level product is larger, more immersible pumps can be used while conveying to improve efficiency；By setting It is conveyed in the submersible sewage pump timing for adjusting distributing reservoir into underground diafiltration module；

When aproll level product is larger, it can be used through multiple water inlets from the heart position flowing thereto of aproll layer edge, mention Seepage flow speed and lower infiltration treatment effeciency under high sewage；Multiple water inlets can be specifically set on the pipe network inside aproll layer, respectively from Different directions water inlet at the outer rim of pipe network, improves water intake velocity, shortens flooding time, improves water inlet efficiency；

The spray-hole opened up on each pipeline of pipe network inside first aproll layer 303 is respectively facing two sides, upwardly or downwardly, and two The spray-hole of side flows in the plane where the first aproll layer for water, and downward spray-hole permeates laminar flow to first for water It is dynamic；Upward spray-hole exists in the case where water flow pressure is sufficiently large and permeates up for guaranteeing each aproll layer water distribution uniformity The case where；

The spray-hole opened up on each pipeline of pipe network inside second aproll layer 305 is respectively facing two sides, upwardly or downwardly, and two The spray-hole of side flows in the plane where the second aproll layer for water, and downward spray-hole permeates laminar flow for water second It is dynamic；

The spray-hole opened up on each pipeline of pipe network inside third aproll layer 307 is respectively facing two sides, upwardly or downwardly, and two The spray-hole of side is flowed in the plane where third aproll layer for water, downward spray-hole for water to third permeable formation and Refined filtration laminar flow；

Each aproll layer can be passed through raw sewage to carbon source layer, on the one hand the state unsmooth in a wherein aproll layer aproll Under, the operation of system entirety is not influenced, improves the anti-clogging of system entirety；On the other hand, it improves at the sewage load of system Reason improves treatment effeciency.Step S2, a part of raw sewage enter underground diafiltration module, another part raw sewage warp through aproll layer Enter the carbon source layer 401 of 300 lower section of diafiltration module located underground after aproll layer；

During aproll, raw sewage enters the first, second, third aproll layer simultaneously, and a part of sewage is through each aproll layer It respectively enters infiltration under the first, second, third permeable formation to handle, filters out most bulky grain organic matter in raw sewage and carry out Then biochemical reaction filters out remainder large particulate matter and most little particle organic matter and is given birth to by filter bed of essence Enter carbon source layer 401 after changing reaction；It is anti-when encounter the vertical carbon source that penetrates filter layer that some raw sewage has little time diafiltration When plugging 305-2, then enter the carbon source pipe network 402 of horizontal distribution from the deflector hole of vertical carbon source pipe-blocking-proof 305-2, it is final direct Reaction zone 403 into biological filter unit 400 provides carbon source for anti-nitration reaction；

A part has not enough time to enter filter layer raw sewage through to seeping under carbon source layer, through carbon source layer enter reaction zone carry out it is anti- Nitration reaction, the filter bed of essence bottom above carbon source layer set return pipe, and for adjusting aerobic zone and anaerobic zone, reaction zone is located at carbon Below active layer, generally in anaerobic state, good reaction environment, while the diafiltration above carbon source layer are provided for anti-nitration reaction Layer is in state of itching, it is ensured that filter layer is wet/dry than stablizing in system operation, greatly reduces as high load capacity is long-term Operation increases wet/dry risk more blocked than leading to filtration system of filter layer.It can continue unimpeded operation；Anti-nitration reaction is steady Fixed to carry out, the removal rate of TN (total nitrogen) is higher；It handles sewage quantity to increase, i.e., load increases, three layers of filter layer raw sewage of upper, middle and lower Allocation proportion is 1:1:1, and the processing capacity of system: sewage occupied area per ton is 1 square metre.

Preferably, step 2 includes:

Step 21, a part of raw sewage imports carbon source pipe network through vertical carbon source pipe-blocking-proof 305-2 after each aproll layer 402；

The raw sewage for having little time diafiltration in each aproll layer can be transferred through vertical carbon source pipe-blocking-proof 305-2 and be introduced directly into carbon source In pipe network 402, on the one hand preventing from being chronically at working condition organic matter because of filter layer, aggregation results in blockage on surface layer, reduces system On the other hand load-bearing capacity and anti-blocking ability reduce caused by introducing carbon source layer as carbon source to raw sewage because of the blocking of permeable formation Adverse effect；

Step 22, raw sewage through carbon source pipe network 402 is in multiple spot shape while horizontal plane direction is spread and flowed to carbon downwards Active layer 401 is lower to seep.Carbon source pipe network 402 is laid in two sides and towards the direction of reaction zone 403 several in grid-like horizontally disposed Spray-hole.Spacing is 1.5 to 2 meters；Two sides and bottom are provided with the water distributing pore or spray-hole being evenly distributed, the translateral spray of raw sewage Perforation is to carbon source layer water distribution, through downward spray-hole to 403 water distribution of reaction zone below carbon source layer；On the one hand be conducive to carbon source layer 401 carbon sources are evenly arranged, and on the other hand accelerate infitration process.

There is deflector hole at the top of vertical carbon source pipe-blocking-proof 305-2, raw sewage enters in vertical carbon source pipe-blocking-proof through deflector hole, And gravel is placed around deflector hole prevents filter layer filtrate from being directly entered inside vertical carbon source pipe-blocking-proof；Have in the present invention one In body embodiment, vertical carbon source pipe-blocking-proof 305-2, which runs through, entirely descends diafiltration module, top and 304 top horizontal of the first permeable formation Together, introduction hole is opened up in the place by the second aproll layer 306 to be connected with the horizontal pipe network in the second aproll layer 305, passing through The place of third aproll layer 307 opens up introduction hole and is connected with the horizontal pipe network in third aproll layer 307, directly by second, The raw sewage of three aproll layers is introduced directly into carbon source layer 401；

Preferably, step 21 includes: that raw sewage does not have enough time wherein entering underground after the horizontal water distribution pipe network of top layer The part that the filter layer of diafiltration module carries out lower infiltration enters carbon source pipe network 402 through vertical carbon source pipe-blocking-proof 305-2；In raw sewage warp It is not in time for wherein carrying out the part of lower infiltration through vertical carbon into the filter layer of underground diafiltration module after the horizontal water distribution pipe network of layer Source pipe-blocking-proof 305-2 enters carbon source pipe network 402；Raw sewage does not have enough time wherein entering underground after the horizontal water distribution pipe network of lower layer The part that the filter layer of diafiltration module carries out lower infiltration enters carbon source pipe network 402 through vertical carbon source pipe-blocking-proof 305-2.

Usually by the biggish gravel pack of particle, raw sewage spreads through carbon source distribution pipe network in horizontal plane direction and flows carbon source layer It is downwards in multiple spot shape while dynamic to seeping under carbon source layer, the bulky grain or sheet organic matter or microorganism in raw sewage are through carbon source point Reaction zone is quickly entered after cloth pipe network, carbon source layer, bulky grain organic matter will not be in carbon source strata collection, it is ensured that being located at carbon source Wet/dry ratio of the filter layer of layer top is stablized, and there is usually no the wet/dry than being dropped significantly the case where gradually increasing accordingly of system The blocked risk of low filtration system.

Not shown in another specific embodiment of the present invention, vertical carbon source pipe-blocking-proof includes three layers, the vertical carbon source of first layer The raw sewage for having little time diafiltration in first aproll layer is directly introduced directly by pipe-blocking-proof between the first aproll layer and carbon source layer Carbon source pipe network, top is concordant at the top of the first filter layer, and Air ventilation cap is set on top；The second layer is vertically positioned at the second aproll layer Between carbon source layer, the raw sewage for having little time diafiltration in the second aproll layer is directly introduced directly into carbon source pipe network, top and second It is concordant at the top of filter layer, and Air ventilation cap is set on top；Third layer is vertically positioned between third aproll layer and carbon source layer, directly will The raw sewage for having little time diafiltration in third aproll layer is introduced directly into carbon source pipe network, and top is concordant at the top of third filter layer, and Air ventilation cap is set on top；Relative to the former, the filtration efficiency of raw sewage will not be reduced, while the stifled of each filter layer can be prevented Plug greatly improves carbon source and introduces efficiency, accelerates denitrification denitrogenation reaction.

Step 20, raw sewage water inlet is completed after the sewage of each aproll layer falls and does, never through each layer aproll layer difference With height simultaneously in horizontal plane direction and vertical level downwardly direction Multipoint Uniform cloth wind, it is single that air-flow passes through underground diafiltration Member, gas vent discharge of the exhaust gas from the filter bed of essence bottom for being located at the bottom；

Referring to fig. 4, correspondingly, due to improving sewage infiltration capacity, consequently also the permeable formation phase is being passed through for large amount of sewage Between biochemical reaction enough oxygen is provided；First layer, the second layer and third layer are entered the wind, and each of entire subsurface wastewater infiltration system is made Layer filler and filtrate keep aerobic environment；The input of raw sewage be it is intermittent, air inlet is also to be intermittent.First layer, the second layer and Water distribution-gas distribution pipe of third layer is also act as gas distribution pipe in water distribution interval and supplies oxygen to system air-supply, makes entire subsurface wastewater infiltration system Each layer filler and filtrate keep aerobic environment, have dual function, it is compact-sized.

Each aproll layer arranged from top to bottom reduces respectively to each filter layer gas distribution because of wind-force streamwise formula in gradient Successively decrease to the influence for causing cloth wind unevenness inside filter layer or filter bed of essence far from wind regime position, multiple air flow sources are in layered distribution Filter layer is passed down through at the top of each filter layer, exhaust gas is discharged through the filter bed of essence bottom of the bottom so that inside filter layer and Filler and filtrate inside filter bed of essence can sufficiently contact with oxygen and carry out oxygenolysis, improve lower infiltration treatment effeciency, thus Improve sewage treating efficiency.

Preferably, the airflow direction between the adjacent two aproll layers is opposite and interlaced with each other, is being located at described in adjacent two Turbulent flow is formed inside filter layer between aproll layer.Uniform gas distribution in the horizontal plane, aproll layer is interior to form turbulent flow；While adjacent two Layer pipeline lays aperture respectively on toward each other in the direction, and the airflow direction between adjacent two pipeline is opposite and interlaced with each other, Uniform gas distribution on the vertical plane, filter layer is interior to form turbulent flow, in order to guarantee that air-flow moves down on the whole, is located at undermost pipe Road is additionally provided with downward aperture, so that air-flow and water are percolated laminar flow to lowest level.It preferably, is the equal of three layers of gas distribution of guarantee Even property, it is identical as downward opening also to lay upward aperture, quantity and size on top layer's pipeline, and with downward aperture Position is staggered.

Relative to existing sewage disposal device or sewage treatment process, this programme proposes one kind in the filter layer of underground Portion forms the concrete scheme of turbulent flow gas supply, thinner for filter layer inner stuffing particle, larger to resistance caused by air-flow operation Behaviour in service, propose it is porous staggeredly gas distribution, by artificially airflow direction being interfered to enable air-flow when flowing through inside filter layer It is enough to form turbulent flow, by the effect each other between air-flow and between air-flow and packing medium so that air-flow is by packing medium Most gaps improve the contact area of gas and packing medium, and then realize coming into full contact with for gas and packing medium, real Now uniform gas distribution improves reaction efficiency, and practical.

The mechanical multilayer oxygen supply that this programme uses, raw sewage water inlet is completed after the sewage of each aproll layer falls and does, through each The layer aproll layer is respectively from different height simultaneously in horizontal plane direction and perpendicular to horizontal plane downwardly direction Multipoint Uniform cloth Wind, air-flow pass through filter layer and filter bed of essence, gas vent discharge of the exhaust gas from the filter bed of essence bottom for being located at the bottom；And it is low in temperature When, air is heated, it is ensured that microorganism can normal effectively degradation of contaminant., occupancy field high with processing sewage load The characteristics of ground area is small, climate condition does not limit.Furthermore this programme uses intermittent duty, for oxygen transfer efficiency height.

In an embodiment of the present invention, in order to make air-flow through each aproll layer and meanwhile can in the horizontal plane and perpendicular to It is evenly arranged on the direction of horizontal plane, such as is equipped with planar pipe network in each aproll layer, the laying of pipe network is for example in lattice Palisade or helical form or dendritic (protection supervisor and several one end are connected to the branch pipe on supervisor, are also connected with several capillarys on supervisor Pipe etc., the skeletal structures of similar tree) at least one of structure, several holes are laid on the direction where plane on pipeline, it is adjacent Pipeline on hole is opened up on direction close to each other, the position in hole offsets one from another, and when air inlet can form disorderly inside aproll layer On the one hand stream reduces aproll layer inner dead space, so that gas distribution is more uniform inside aproll layer, to improve the good of gas and aproll layer Oxygen biological treatment efficiency.

The projection of pipe network installation position inside adjacent two aprolls layer in the horizontal plane is overlapped, i.e., pipeline is in the horizontal plane Projection is overlapped, and the corresponding pipeline in upper and lower two positions opens up hole on direction close to each other, and the position in hole offsets one from another, pipeline Can form turbulent flow when interior air inlet inside the filter layer between two aproll layers, the pipe network of grid-like arrangement can inside filter layer shape At turbulent flow is formed on several vertical planes intersected in length and breadth, the pipe network of helical form arrangement can be formed in the shape of a spiral inside filter layer (also known as cyclic annular, circular shape can be adapted with the concrete shape of aproll layer, such as pipeline can be arranged for rectangular aproll layer Be square circular shape, and rounded circular shape can be arranged in pipeline by circular aproll layer) it is formed on the vertical plane of winding Turbulent flow, vertical plane run through the thickness of filter layer, reduce filter layer inner dead space, so that filter layer gas distribution is more uniform, to improve The Aerobic biological process efficiency of raw sewage inside gas and filter layer；On the other hand, relative to one-way air inlet, fresh sky is extended Residence time of the gas inside permeable layer, so that Aerobic biological process is more abundant；In addition, bidirection air intake can be improved gas penetration The ability of filter layer, improves the contact area of filtrate inside the oxygen and filter layer in fresh air, and then accelerates oxygen and seep Thoroughly on filtrate organic matter Aerobic biological process.

In one embodiment of the present invention, the pipeline for constituting pipe network lays aperture, adjacent two pipe respectively to the left and right sides Airflow direction between road is opposite and interlaced with each other, in the horizontal plane uniform gas distribution, and turbulent flow is formed in aproll layer；Simultaneously pipeline to Aperture is laid respectively above and below, the airflow direction between adjacent two pipeline is opposite and interlaced with each other, on the vertical plane uniform gas distribution, Turbulent flow is formed in filter layer.

Between first aproll layer 303 and the second aproll layer 305 and between the second aproll layer 305 and third aproll layer 307 Airflow direction on the contrary, when stream pressure is larger, enter in filter layer from upper and lower both direction respectively.

Due to being filled with the little particle filtrate of random arrangement inside filter layer, downdraught is through big on the whole when filter material Cause to be formed a fluid stream of a round table-like or close taper that radius becomes larger from top to bottom, and the direction that becomes larger of radius and from upper and Lower flow velocity is gradually reduced, and substantially forms the rotary table that radius becomes larger from bottom to top when updraft flows through filtrate on the whole The a fluid stream of shape or nearly taper, and the direction that becomes larger of radius and flow velocity is gradually reduced from bottom to top, one-way gas flow presents regular Movement, approximatively can be considered as laminar flow for air motion on the whole, and on the one hand there is filter layer back gas face, (face of face air-flow is meeting Gas face, back to the face of air-flow back gas face) the insufficient problem of ingress of air, on the other hand in the filtrate of the position close to pipeline Air is touched to be limited, i.e., it is insufficient.

Two-way gas distribution is used in this programme, a fluid stream after combination can be covered with entire filter layer filtrate, improve filtrate and oxygen Contact area, realize uniform gas distribution；In addition, fluid particle can be transported irregularly when both air-flows action simultaneously Dynamic, mutual blending, track is tortuous, leads to chaotic form, the i.e. effect of generation turbulent flow phenomenon.The a fluid stream being overlapped in two directions (randomness, fluid is presented in many of the flow field that part is formed small whirlpool, referred to as turbulent flow, also known as sinuous flow, flow-disturbing or turbulent flow The mutual blending of point, movement is unordered, and kinematicchain element has randomness), such air-flow can be adequately exposed to filtrate in filter layer Grain interface, including the filtrate inside filter layer meet gas face and back gas face (face of face air-flow meeting gas face, back to the face of air-flow Carry on the back gas face) energy ingress of air, and then the contact area of increase filtrate and oxygen, so that can be filled between filtrate inside filter layer Divide and contacted with oxygen, to accelerate the oxidation reaction inside filter layer；Lower infiltration treatment effeciency is improved, to improve sewage treatment effect Rate.It can be respectively formed turbulent flow inside the first filter layer 304, the second filter layer 306 in the present embodiment, the filtrate inside filter layer is met Gas face and back gas face (face of face air-flow cry meet gas face, back to the face of air-flow cry back gas face) energy ingress of air, and then increase The contact area of filtrate and oxygen, so that can sufficiently be contacted with oxygen between filtrate inside filter layer, to accelerate filter layer Internal oxidation reaction；Lower infiltration treatment effeciency is improved, to improve sewage treating efficiency.

Inlet total pressure power can be set by air compressor control, the inlet pressure of the pipeline of each layer of pipe network by pressure-control valve It is set to constant value, changes the flow of aperture by controlling the quantity of aperture and aperture on pipeline.The size and diafiltration of pressure Drag size, the range of air-flow, the spacing of aperture, the thickness of filter layer of layer are related, can be by calculating or testing acquisition； To improve turbulent flow effect, the flow velocity of updraft and the flow velocity of downdraught are consistent, in the case where ignoring gas self weight, together The aperture of the aperture in both direction up and down on one pipeline, spacing are identical.

When stream pressure fluctuates, and formation turbulent flow required pressure is less than in the short time, filter layer is far from gas source Side is difficult to touch air, can also reduce the non-uniform phenomenon of air inlet inside filter layer by both direction air inlet, will not Too much influence is brought to filtration system, to improve the interference free performance of filtration system；Third filter layer 308 and filter bed of essence The air-flow superposition downward by water distribution-gas distribution pipe in the first filter layer 304, the second filter layer 306 and third layer of 309 oxygen It provides, the exhaust pipe 312 that exhaust gas passes through positioned at 309 two sides of the bottom of filter bed of essence is discharged.

According to the ratio water distribution gas distribution of 1:1:1, the step 20 includes: the horizontal water distribution pipe network of each aproll layer

Step 201a detects the environment temperature of blowing device 315-1；

Step 201b, starting temperature control device 315-2 is according to the blowing device environment temperature to the wind for being sent into each aproll layer Temperature regulated and controled；

The wind of step 201c, regulation to preset temperature are sent into each aproll layer through blowing device is intermittent；

Step 201, start blowing device 315-1 after the sewage of each aproll layer falls and does after the completion of water inlet；

Step 202, air-flow through the horizontal water distribution pipe network from the outside to the core respectively to two sides, downward or upward, downwards and two Side radially flows through each aproll layer；

Step 203, air-flow from each aproll sulfate layer flows downhill pass through with each spaced apart filter layer of aproll layer, finally pass through refined filtration It is discharged after layer.

Temperature environment (preset value) required for according to the environment temperature of blowing device and maintaining microorganism can calculate It blows out required temperature, and then the environment temperature of blowing device is adjusted to temperature needed for air-supply；

It divulges information in right amount between falling dry spell, to ensure the oxygen supply to underground diafiltration module, and it is right under cryogenic The air being passed through suitably heats, to keep the activity of microorganism.

The filtrate of filter bed of essence 30~60 minutes usually after water inlet end, more than air-exhausting duct fall it is dry after starting air-supply set It is standby；

When aproll level product is larger, it can be used through multiple air inlets from the heart position flowing thereto of aproll layer edge, mention High gas feed flow rate and lower infiltration treatment effeciency；Multiple air inlets can be specifically set on the pipe network inside aproll layer and blowing device connects It connects, respectively direction air inlet different from the outer rim of pipe network, improves intake velocity, shorten inlet period, improve intake efficiency；

Referring to fig. 4, the spray-hole opened up on each pipeline of pipe network inside the first aproll layer 303 be respectively facing two sides and to Under, upwards, the spray-holes of two sides flows in the plane where the first aproll layer 303 for air-flow, and downward spray-hole is used for Gas is flowed to the first permeable formation 304；

The spray-hole opened up on each pipeline of pipe network inside second aproll layer 305 is respectively facing two sides, upwardly or downwardly, and two The spray-hole of side flows in the plane where the second aproll layer 305 for gas, and upward spray-hole is permeated for gas to first 304 flowing of layer (since water flow pressure is smaller, it is difficult to overcome gravity to flow up, and air pressure is relatively large, and gravity is smaller, energy Enough gravity is overcome to flow up), downward spray-hole is flowed for gas to the second permeable formation 306；

The spray-hole opened up on each pipeline of pipe network inside third aproll layer 307 is respectively facing two sides, upwardly or downwardly, and two The spray-hole of side flows in the plane where third aproll layer 307 for gas, and upward spray-hole is permeated for gas to second 306 flowing of layer (when water flow pressure is smaller, it is difficult to overcome gravity to flow up, and gas-gravity is smaller, can overcome gravity to Upper flowing), downward spray-hole is flowed for gas to third permeable formation 308 and filter bed of essence 309；

It is intake, is intake 6~8 times within one day, by the first, second, and third cloth by submersible sewage pump intermittence by adjusting distributing reservoir Water-cloth gas-bearing formation presses the pro rate of 1:1:1, and every layer intakes between 4~5cm every time.30~60 minutes after water inlet end, row The filtrate of filter bed of essence more than air hose fall it is dry after, the first, second, and third water distribution-cloth gas-bearing formation pipe is used as ventilation duct, by 1:1:1 Pro rate, live gas removes after fresh air uniformly enters the first, second, and third water distribution-cloth gas-bearing formation via ventilation duct Carry out the sky outside lateral migration, predominantly migrated into lower layer's filtrate and filler, while oxygen content in filtrate and filler being reduced Gas is finally discharged from two exhaust pipes 312 of underground diafiltration module lower part, thus completes the oxygen supply to filtrate and filler.

Step S3, raw sewage through carbon source layer enter reaction zone 403 with through the lower sewage that seeps that treated of underground diafiltration module 300 Carry out denitrification denitrogenation reaction；The pollutants such as nitrogen, phosphorus are further removed through biofilter, are finally discharged；

Biological filter unit 400 is successively from top to bottom: carbon source layer 401, denitrogenation denitrogenation dephosphorizing layer (are located at reaction zone 403 It is interior) sum aggregate water layer 404；Underground diafiltration module 300 and about 400 biological filter unit are closely coupled.The height of underground diafiltration module Degree is 1.3~1.5 meters, and the height of biological filter unit is 0.5~0.6 meter.

Step S4, the collection water layer 404 that the water after reaction passes through positioned at 403 bottom of reaction zone are discharged.Catchment drainage blanket 404 Interior embedded channel form collector pipe 405-1, is most discharged through drain outlet 405-2 through drainpipe 405 under the action of water pressure afterwards.

Coating is original position soil layer, hardening of cement layer or ground brick layer；Water distribution-cloth of first layer, the second layer and third layer Gas-bearing formation is mainly made of the gravel that partial size is 5~40mm, is loaded with a thickness of 10~20cm；Filter layer is mainly made of quartz sand, Saturation coefficient of permeability is 0.1~1.0cm/s, is loaded with a thickness of 10~20cm；Filter bed of essence is mainly by quartz sand, in-situ soil and zeolite Mixing composition, saturation coefficient of permeability are 0.01~0.1cm/s, are loaded with a thickness of 20~40cm；Carbon source layer mainly by partial size be 5~ The gravel of 40mm forms, and loads with a thickness of 10cm；Denitrogenation dephosphorizing layer is mainly made of common brick fragment and gravel mixing, partial size 5 ~20mm loads with a thickness of 50~70cm；Collection water layer is mainly made of the gravel that partial size is 5~40mm, is loaded with a thickness of 15 lis Rice；Ecological filter does Anti-seeping technology.The pollutants such as nitrogen, phosphorus are further removed through biofilter, are finally discharged；Wherein, underground Diafiltration module is located on biological filter unit, and the two is closely coupled；Raw sewage reaches biology after the processing of underground diafiltration module Biofilter unit, at this moment liquid level can rise, this region forms aerobic-anaerobic alternate area；The top of aerobic-anaerobic alternate area by Oxygen is sent in order in ventilation, forms aerobic zone；The lower section of aerobic-anaerobic alternate area is in complete zone of saturation to form anaerobism Area.

After pretreatment, supernatant is lifted into the first, second, and third water distribution-cloth gas-bearing formation by submersible sewage pump to sanitary sewage, When sewage flows through rubble and filter layer, pollutant can be carried out decomposing by the biomembrane of filler and filter material surface and is gradually reduced, big portion Dividing sewage, diafiltration sequentially passes through filter layer and filter bed of essence directly down under the effect of gravity, and fraction sewage is horizontal also in aproll layer To being percolated gradually downward while migration, fine filtering layer and filter bed of essence are finally also sequentially entered.Filter layer, which intercepts most of particle, to be had Machine object, filter bed of essence intercept few particulate organic matter, and particulate organic matter is finally decomposed via bio-contact oxidation.Simultaneously in raw sewage The microbial film that dissolved organic matter is attached to the filter material surface of filter layer is adsorbed and is decomposed；NH₄ ⁺Mainly by negatively charged mine Object absorption, and removed by nitrification；Phosphorus then passes through absorption and forms phosphate removal.The sewage for having little time diafiltration, which is worked as, to be encountered When penetrating the vertical carbon source pipe-blocking-proof of filter layer, then enter horizontal carbon source distribution pipe network from the deflector hole of vertical carbon source pipe-blocking-proof, Finally being directly entered biological filter unit reaction zone provides carbon source for anti-nitration reaction.

Dissolved organic matter is finally decomposed by the microorganisms utilization during downward diafiltration, and organic nitrogen is then via ammoniation It is converted into ammonia nitrogen.Newly-generated and primary ammonia nitrogen is adsorbed by filtrate and is intercepted, and is converted to nitrate nitrogen through nitrification and small part is sub- Nitrate nitrogen.Appropriate microkinetic air-supply is carried out to underground diafiltration module between falling dry spell, to ensure oxygen supply, aerobic zone is formed, goes Except COD, BOD, NH₄ ⁺With decomposition sludge.Raw sewage through filter layer and filter bed of essence processing after, in addition to mainly in the form of nitrate nitrogen existing for Nitrogen and fail outside the phosphorus for being adsorbed and precipitating after long-play, other pollutants have largely been removed.

Preferably, in the step 1, it is in multiple spot shape equably to infiltration that raw sewage, which is embedded in the pipe network of each aproll layer, Permeable layers injection；In the step 20, the pipe network that air-flow is embedded in each aproll layer is equably sprayed to permeable formation in multiple spot shape It penetrates.Preferably, the pipe network is in grid-like arrangement, and is laying several spray-holes towards the direction of filter layer.Preferably, including At least three layers of aproll layer, the pipe network of each aproll layer according to 1:1:1 ratio water distribution gas distribution.Operational mode is to be divided by adjusting It is intake with pond by submersible sewage pump intermittence, intakes 6~8 times within one day, the ratio of 1:1:1 is pressed by the first, second, and third water distribution-cloth gas-bearing formation Example distribution, every layer intakes between 4~5cm every time.The filter of filter bed of essence 30~60 minutes after water inlet end, more than air-exhausting duct Material fall it is dry after, the first, second, and third water distribution-cloth gas-bearing formation pipe is used as ventilation duct, by the pro rate of 1:1:1, fresh air Live gas is in addition to carrying out lateral migration after uniformly entering the first, second, and third water distribution-cloth gas-bearing formation via ventilation duct, and first Layer and the air of third layer are predominantly migrated into lower layer's filtrate and filler, and the second layer is in addition to mobile to lower layer's filtrate and filler Outside, it also migrates into upper layer filtrate and filler；The air that oxygen content in filtrate and filler is reduced simultaneously is from underground diafiltration module Two exhaust pipes of lower part are finally discharged, and thus complete the oxygen supply to filtrate and filler.

Preferably, the step 3 includes:

Step 31, the sewage after refined filtration is mixed with the raw sewage for uniformly stepping into carbon source layer 401 through carbon source pipe network；

The raw sewage introduced through carbon source pipe provides carbon source for anti-nitration reaction.In underground diafiltration module three filter layers Vertical carbon source pipe-blocking-proof 305-2 is set, and carbon source piping network laying is in carbon source layer 401, can be to the same of horizontal direction in grid-like When permeate carbon source layer downwards and enter the denitrogenation dephosphorizing layer of reaction zone, only anti-nitration reaction does not provide carbon source, and also assures System it is wet/dry than stability, filter unit with effectivelying prevent and block；In biological filter unit carbon source layer 401, water is set Flat carbon source distributor pipe 402 ensure that the good denitrification ability of system；The efficient operation steady in a long-term of realization system, to guarantee System water outlet indices can reach steadily in the long term or better than GB18918-2002 level-one A class discharge standard.

Step 32, it is downwardly into reaction zone and carries out denitrification denitrogenation reaction；

Water rich in nitrate nitrogen and the raw sewage that is introduced by vertical carbon source pipe-blocking-proof 305-2 are through horizontal carbon source pipe 402 in biology Diafiltration is into aerobic-anaerobic alternate area downwardly together after the carbon source layer 401 in filter tank mixes, at this point, this area's saturation can accordingly increase 10mc or so, under this aerobic and anaerobic state, the organic matter in raw sewage is primarily used to anti-nitration reaction, rather than by Aerobic microbiological decomposes；

Step 33, the water above the carbon source layer flows back into sewage through return pipe 314 and adjusts distributing reservoir 200, instead Purification is completed into the drainage blanket 405 that catchments after answering the sewage water denitrification in area；

Unemployed organic matter decomposition and inversion under aerobic condition, will not result in blockage because of accumulation.By vertical Carbon source pipe-blocking-proof enters the sewage of horizontal carbon source distributor pipe, is directly entered biological filter unit.As system is in higher load Under the conditions of longtime running, the permeability of each filter layer will be reduced slowly in ground filter unit, enter life by vertical carbon source pipe-blocking-proof The water in object filter tank will be gradually increased, so that the sewage load that filter unit is born over the ground carries out automatic feedback adjusting, be filtered with making Unit it is wet/dry than basicly stable, the operation steady in a long-term of safeguards system of holding, the ability of anti-shock loading is also stronger.Sewage Complete zone of saturation will be entered behind aerobic-anaerobic alternate area, anaerobic zone is anaerobic bacteria and oxygen bacterium provides excellent life Dis environment, to ensure that anti-nitration reaction further carries out.It is adjusted in addition, the water rich in nitrate nitrogen flows automatically to enter through return pipe Distributing reservoir, due to containing a small amount of dissolved oxygen and a large amount of nitrate in the waste water Jing Guo aerobic underground filtration process, these nitrate are It is formed by the ammonium oxidation adsorbed when preceding primary water inlet, causing to adjust dominant bacteria in distributing reservoir is heterotrophic denitrifying Bacteria, different Under the action of supporting denitrifying bacterium, with Ν 0₃ ^—- Ν makees electron acceptor, makees electron donor with the organic carbon in waste water, by Ν 0₃ ^—— Ν is reduced into N₂, while the COD for adjusting distributing reservoir waste water is also reduced, organic carbon is oxidized to CO₂, realizing denitrification denitrogenation Meanwhile further removing the residual organic matter in waste water.

Biofilter filling is the siliceous of 5~10mm, the gravelly main filler of irony by partial size, additionally includes volume Than for 5%~10%, mainly by plant leaf, paddy skin, the calcareous additional filler formed, these mixed fillers are flooded (not full With), oxygen supply is limited, to form amphimicrobian environment.The NO that water rich in nitrate nitrogen is formed through nitrification₃ ^—It is (a small amount of NO₂ ^—) N can be converted to by denitrification under the amphimicrobian environment of advanced treating₂, achieve the purpose that denitrogenation.

Carbon source pipe raw sewage, plant leaf and paddy skin of the organic carbon source part needed for anti-nitration reaction from ground filter unit, Furthermore the biological active component in filler (plant leaf, paddy skin etc.) is microorganism parasitism place, is also promotion denitrification Supplement organic carbon source.Biofilter reaction zone is filled with the mixture of calcic and iron content higher material and gravel, enough further The residual PO of reaction zone will be entered₄ ^—Then phosphate is formed by absorption, surface reaction and precipitation further to remove.To sum up Described, the present invention realizes ground by the way that underground is percolated Aerobic Process for Treatment and biofilter processing amphimicrobian processing combination Coupling synergistic effect between lower diafiltration module and biofilter processing unit.

The step 4 includes:

Step 41, purified water through drainpipe in reaction zone hydraulic pressure effect under from the drainage blanket that catchments upwards in carbon source layer 401 top export；It is discharged under the action of water pressure through discharge outlet 313 through drainpipe 405-1.

During normal reaction, water is filled in reaction zone, purified water flows into the drainage blanket that catchments from bottom, upper layer Carbon source layer has the sewage handled by underground filter layer and raw sewage endlessly to enter reaction zone, when the page is more than return pipe And it when drainpipe height (return pipe and drainpipe outlet are in sustained height), while sewage backflow enters preparing pool, will catchment The water of drainage blanket is extruded through drainpipe, completes the export of water conservancy diversion and purified water；The friendship of aerobic zone and anaerobic zone is also achieved simultaneously It replaces；

Step 42, it carries out disinfection after detection meets discharge standard for urban reclaimed water.

Sewage disposal system occupied area 50m², system hydraulic loading is 100cm/d, water inlet 8 times daily.Testing sewage is The sanitary sewage in Changsha copper government porcelain kiln research center, tests and analyzes through third party testing agency, after processing water outlet in COD, BOD, The concentration range of ammonia nitrogen, total nitrogen and total phosphorus is respectively 13.2mg/L, 3.6mg/L, 1.43mg/L, 3.29mg/L and 0.04mg/L, Processing water outlet meets level-one A class discharge standard in national urban wastewater treatment firm pollutant emission standard (GB18918-2002). It is particularly suitable for the processing of the small-scale sanitary sewage such as urban cells, town & country area, construction cost is low, daily is not necessarily to Special maintenance, operating cost are low, and ton cost of sewage disposal is lower than 0.1 yuan, fully meet after processed sewage chlorination Urban reclaimed water water standard.

Subsurface wastewater infiltration system by actively being introduced carbon source and eliminating blocking and biofilter carbon source layer denitrification by the present invention Denitrification reaction organically combines, and realizes the coupling synergistic effect between underground diafiltration module and biofilter processing unit.

Technical solution of the present invention overcomes biochemical processing (activated sludge method, contact oxidation method, SBR etc.) running cost With high and maintenance management complexity disadvantage；Overcome traditionally descend diafiltration techniques and Artificial Wetland Techniques occupied area it is very big lack Point；The shortcomings that overcoming artificial swamp operation climate condition limitation and mosquito easy to breed.

China's land resource is precious, underdeveloped, lacks decentralized wastewater treatment facility operation security mechanism, weather conditions Variation is big, and in order to ensure the construction and normal operation of decentralized wastewater treatment facility, which in most cases has can not It is alternative.Its important technical advantage is as follows:

Take up little area and do not need land reserve zone: high load capacity subsurface wastewater infiltration system uses buried installation, and total system takes up an area about 1.5m2/ ton/days, earth's surface system can carry out after the installation is completed secondary development, utilize, fulfiled conscientiously we " returning to the field in the people, The promise in the village Huan Diyu " has adapted to China's land resource fundamental realities of the country in short supply.

Invest small: the investment construction cost of high load capacity subsurface wastewater infiltration system is close with biochemical processing, at ecology Reason technology building cost (except the engineering for thinking diminution), average construction cost unit price are 5000 yuan/ton or so.

Operating cost is very low: the diafiltration of high load capacity underground is microkinetic processing system, and without high-power current consuming apparatus, standardization is single First (100/ ton/day) daily only 7 degree of power consumption (being calculated by equipment rated power), annual operating cost about 1700-1800 member.

Maintenance management is easy: the daily operating of system is voluntarily adjusted by full-automatic control system, is not necessarily to any manual operation.System System Maintenance Significant Items only relate to periodic cleaning one of grating garbage.

High treating effect: water outlet is limpid tasteless, and TSS, COD, BOD, ammonia nitrogen, total nitrogen, colibacillus of excrement are lower than national cities and towns Sewage treatment plant level-one A class discharge standard (GB18918-2002) limit value (or removal rate is more than 90%), total tp removal rate are 80- 95%.It can be directly as greening, landscape water, breeding water and irrigation water after sewage treatment.

Stable: the not simple equipment of high load capacity subsurface wastewater infiltration system is pieced together, and the structure optimization of system is passed through Adjustment, makes it have too many levels self-checking system, feedback mechanism and self-regulating function.

Without secondary pollution: high load capacity subsurface wastewater infiltration system establishes " one-stop " system for handling, and sewage enters the system certainly Any by-product that may cause secondary pollution is no longer generated afterwards.

Can operate normally under cryogenic conditions in winter: high load capacity subsurface wastewater infiltration system can be by energy saving oxygen supply system tune Section diafiltration Tanaka temperature so that system in winter in high-efficiency operation.

Using flexible: high load capacity subsurface wastewater infiltration system uses modular design concept, the size of project scale from tens of tons/ Day to thousands of ton per days.

The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all at this Under the inventive concept of invention, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/use indirectly It is included in other related technical areas in scope of patent protection of the invention.

Claims

1. a kind of efficient denitrification filters sewage water treatment method ecologically characterized by comprising

Step 1, raw sewage is through multilayer aproll layer arranged up and down respectively from different height in the same of horizontal plane direction sprawling flowing When carry out lower infiltration processing through underground diafiltration module downwards；Underground diafiltration module includes multilayer filter layer, the filter layer with it is described Aproll layer is alternately arranged；

Step 2, a part of raw sewage enters the diafiltration being located at below the aproll layer in lower infiltration treatment process after each aproll layer Layer, several vertical carbon source pipe-blocking-proofs of another part raw sewage through the filter layer below the aproll layer after each aproll layer are straight The carbon source layer that taps into below diafiltration module located underground imports aproll layer below the aproll layer；Each diafiltration layer surface and interior The sewage in portion imports lower layer's aproll layer through the vertical carbon source pipe-blocking-proof or is introduced directly into the carbon source layer；

Step 3, raw sewage enters reaction zone through carbon source layer and carries out denitrification with through seeping treated sewage under the diafiltration module of underground Denitrification reaction；

Step 4, for water level more than the part overflow of carbon source layer, the water after reaction, which passes through, is located at the reaction zone bottom in reaction process Collect water layer discharge.

2. efficient denitrification according to claim 1 filters sewage water treatment method ecologically, which is characterized in that step 2 packet It includes:

Step 21, a part of raw sewage imports carbon source distribution pipe network through vertical carbon source pipe-blocking-proof after each aproll layer；

Step 22, raw sewage is in multiple spot shape while horizontal plane direction is spread and flowed to carbon source layer through carbon source distribution pipe network downwards Lower infiltration.

3. efficient denitrification as claimed in claim 2 filters sewage water treatment method ecologically, which is characterized in that the carbon source pipe network is in Grid-like arrangement, and several spray-holes are laid in two sides and towards the direction of reaction zone.

4. efficient denitrification as claimed in claim 2 filters sewage water treatment method ecologically, which is characterized in that

In the step 21, all have deflector hole at the top of vertical carbon source pipe-blocking-proof and on side wall, raw sewage inside aproll layer and Sewage inside filter layer enters in vertical carbon source pipe-blocking-proof through deflector hole.

5. efficient denitrification as claimed in claim 4 filters sewage water treatment method ecologically, which is characterized in that in the step 1, packet At least three layers of aproll layer are included, are embedded with horizontal water distribution pipe network in each aproll layer；Step 21 includes:

Raw sewage is not in time for wherein carrying out down into the filter layer of underground diafiltration module after the horizontal water distribution pipe network of top layer The part of infiltration enters carbon source distribution pipe network through vertical carbon source pipe-blocking-proof；

Raw sewage is not in time for wherein carrying out lower infiltration into the filter layer of underground diafiltration module after the horizontal water distribution pipe network in middle layer Part through vertical carbon source pipe-blocking-proof enter carbon source distribution pipe network；

Raw sewage is not in time for wherein carrying out lower infiltration into the filter layer of underground diafiltration module after the horizontal water distribution pipe network of lower layer Part through vertical carbon source pipe-blocking-proof enter carbon source distribution pipe network.

6. efficient denitrification as claimed in claim 4 filters sewage water treatment method ecologically, which is characterized in that in the step 1, packet At least three layers of aproll layer are included, are embedded with horizontal water distribution pipe network in each aproll layer；Step 21 includes:

It is vertical that raw sewage enters a part warp during upper layer filter layer carries out lower infiltration after the horizontal water distribution pipe network of top layer Carbon source pipe-blocking-proof enters middle layer aproll layer；

A part is through vertical carbon during raw sewage carries out lower infiltration into middle layer filter layer after the horizontal water distribution pipe network in middle layer Source pipe-blocking-proof enters lower layer's aproll layer；

A part is through vertical carbon during raw sewage carries out lower infiltration into lower layer's filter layer after the horizontal water distribution pipe network of lower layer Source pipe-blocking-proof enters carbon source distribution pipe network.

7. efficient denitrification as described in any one of claims 1 to 6 filters sewage water treatment method ecologically, which is characterized in that in institute It states between step 2 and step 3 further include:

Step 20, raw sewage water inlet is completed after the sewage of each aproll layer falls and does, through each layer aproll layer respectively from different height For degree simultaneously in horizontal plane direction and the direction Multipoint Uniform cloth wind of vertical level, air-flow passes through underground diafiltration module, exhaust gas from Gas vent positioned at the filter bed of essence bottom of the bottom is discharged.

8. efficient denitrification as claimed in claim 7 filters sewage water treatment method ecologically, which is characterized in that each aproll layer According to the ratio water distribution gas distribution of 1:1:1, the step 20 includes: horizontal water distribution pipe network

Step 201, start blowing device after the sewage of each aproll layer falls and does after the completion of water inlet；

Step 202, through the horizontal water distribution pipe network, upward, downward and two sides radially flow through each dissipate to air-flow respectively from the outside to the core Water layer；

Step 203, air-flow from each aproll sulfate layer flows downhill pass through with each spaced apart filter layer of aproll layer, finally after filter bed of essence Discharge.

9. efficient denitrification as claimed in claim 8 filters sewage water treatment method ecologically, which is characterized in that in the step 201 Before further include:

Step 201a detects the environment temperature of blowing device；

Step 201b, starting temperature control device are carried out according to temperature of the blowing device environment temperature to the wind for being sent into each aproll layer Regulation；

The wind of step 201c, regulation to preset temperature are sent into each aproll layer through blowing device is intermittent.

10. efficient denitrification as claimed in claim 9 filters sewage water treatment method ecologically, which is characterized in that step 3 packet It includes:

Step 31, the sewage after refined filtration is mixed with the raw sewage for uniformly stepping into carbon source layer through carbon source pipe network；

Step 33, the water above the carbon source layer flows back into adjusting distributing reservoir, completes after the sewage water denitrification in reaction zone Purification enters the drainage blanket that catchments；

The step 4 includes:

Step 41, purified water through drainpipe in reaction zone under hydraulic pressure effect from catchmenting drainage blanket upwards above carbon source layer Export；

Step 42, derived water carries out disinfection after detection meets discharge standard for urban reclaimed water.