CN202379845U - Efficient-denitrification manual under soil percolated sewage treatment composite system - Google Patents
Efficient-denitrification manual under soil percolated sewage treatment composite system Download PDFInfo
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- CN202379845U CN202379845U CN2011204421552U CN201120442155U CN202379845U CN 202379845 U CN202379845 U CN 202379845U CN 2011204421552 U CN2011204421552 U CN 2011204421552U CN 201120442155 U CN201120442155 U CN 201120442155U CN 202379845 U CN202379845 U CN 202379845U
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Abstract
The utility model discloses an efficient-denitrification manual under soil percolated sewage treatment composite system, which comprises a grating pond, an anaerobic settling pond, an adjusting pond and a manual under soil percolation unit which are sequentially connected, wherein the water inlet of the grating pond is a sewage inlet, the water outlet of the manual under soil percolation unit is respectively connected with the water inlet of the anaerobic settling pond and a sampling pond, the bottom of the adjusting pond is provided with a submersible sewage pump, and the submersible sewage pump is connected with the manual land under soil percolation unit through a pipeline. According to the utility model, on the condition that the other indexes are guaranteed to reach the standard, the efficient denitrification is realized, and the increasing environmental requirements are met.
Description
Technical field
The utility model relates to technical field of sewage, diafiltration WWT composite system and method under the artificial soil of particularly a kind of efficient denitrification.
Background technology
Water pollutes and water resources shortage is two hang-ups that mankind nowadays society faces.Extensively exist in China owing to water pollutes the phenomenon that causes used water to reduce, therefore, implementing sewage recycling is the effective way that solves the current water resources shortage of China.And to implement sewage recycling, and water technology is just had higher requirement, not only to remove organism, also to carry out advanced treatment to pollutents such as total nitrogen, total phosphorus.
At present; Most sewage works mainly adopt activated sludge process traditional technologys such as (like A/O, SBR and A/A/O etc.), though the technological comparative maturity of these technologies exists equipment manufacturing cost expensive; Higher to operational administrative personnel competency profiling; The unit cost of sewage disposal is high, and produces shortcoming such as a large amount of mud, is difficult in rural area or remote districts etc. and applies.
Conventional soil treatment process mainly comprises slow land treatment system, rapid infiltration system, overland flow system, artificial wet land system and subsurface wastewater infiltration system.Publication number is that the patent of invention of CN101318735A discloses a kind of sewage water denitrification processing method of artificial rapid infiltration system and application, and this method is through the layering water distribution and complete zone of saturation is set, strengthened the denitrifying capacity of system.But have following problem: (1) sewage is water distribution at filter layer upper surface top, distributes foul smell, and landscape effect is poor, grows mosquito easily and receives weather effect bigger; (2) its oxygen supply only depends on atmosphere to change and inhaled air to the vertical diffusion and the flooding velocity of filter layer, and oxygen supply intensity is low, and oxygen supply can not guarantee when pollutant load is big.And that subsurface wastewater infiltration system main body structures all are embedded in is underground, and can afforesting or harden in the face of land, does not influence surrounding environment and view, therefore compares with artificial rapid infiltration system, and its scope of application is wider.Publication number is that the patent of invention of CN101302047A relates to a kind of underground wetland and high loading subsurface infiltration WWT composite system; This technology is underground wetland function and regulate double-deck aproll function voluntarily for the high loading subsurface wastewater infiltration system has added; Not only significantly improved the portative power of system to pollutent; Reduce and build and running cost, and make system more stable.But owing to lack the supply of carbon source and the construction of anaerobic environment, this system's denitrifying capacity a little less than, the removal effect of total nitrogen remains further to be improved.
During " 12 "; The special research and development of China's water are promoted emphasis and will be laid equal stress on from being reduced to of point source pollutant main steering surface source and point source reduction control; From improving centralized WWT usefulness is main to turn to the large-scale centralized formula to combine with small-sized distributing high efficiency technical exploitation to lay equal stress on, from simple pollutent be reduced to main turn to save land, energy-conservation, material-saving formula sewage disposal technology changes.
Therefore, floor space is little, and contaminant removal capacity is strong, and construction and the low efficient sanitary sewage disposal technology of distributing of working cost are badly in need of current.
The utility model content
The purpose of the utility model is to overcome the deficiency of prior art, provide a kind of build with working cost is lower, range of application is wide and effluent quality is good efficient denitrification manual work soil under diafiltration WWT composite system.
The technical scheme of the utility model is: diafiltration WWT composite system under the artificial soil of a kind of efficient denitrification comprises diafiltration module under grating tank, anaerobism settling tank, equalizing tank and the artificial soil that connects successively; The water-in of grating tank is the sewage import, and the water outlet of diafiltration module is connected with the sampling pond with the water-in of anaerobism settling tank respectively under the artificial soil; Equalizing tank bottom is provided with submersible sewage pump, and submersible sewage pump is connected through diafiltration module under pipeline and the artificial soil.
Diafiltration module comprises tectum, aproll layer, the first coarse filtration layer, first filter bed of essence, aproll ventilating layer, the second coarse filtration layer, second filter bed of essence and the water conservancy diversion layer that sets gradually from top to bottom under the said artificial soil; Aproll layer, the first coarse filtration layer and first filter bed of essence are formed first filtering layer, and aproll ventilating layer, the second coarse filtration layer and second filter bed of essence are formed second filtering layer; Be provided with water spraying pipe in the aproll layer, be provided with the aproll vent-pipe in the aproll ventilating layer, be provided with the draining exhaust duct in the water conservancy diversion layer; Water spraying pipe is connected with submersible sewage pump through the pvc pipe road respectively with the aproll vent-pipe, and also through the external blower fan in pvc pipe road, the exit end of draining exhaust duct is the water outlet of diafiltration module under the artificial soil to the aproll vent-pipe; The structure of water spraying pipe and aproll vent-pipe all is that end sealing and pipe shaft are provided with apron hole, and the structure of draining exhaust duct is that an end opens wide and pipe shaft is provided with gully-hole.When diafiltration module was filtered under the artificial soil, the apron hole on the water spraying pipe played the effect of uniform sprinkling, and the apron hole on the aproll vent-pipe alternately plays uniform sprinkling and airy effect, and the gully-hole on the draining exhaust duct alternately plays the effect of air draft and draining.
Said tectum is original position soil layer, cement layer or floor tile layer;
Said aproll layer and aproll ventilating layer all are that thickness is the gravel bed of 10～15cm, and the particle diameter of gravel bed cobble-stone is 5～40mm;
The said first coarse filtration layer and the second coarse filtration layer all are mixolimnions that fine sand and zeolite are formed, and it mainly acts on is to remove organism, suspended substance and ammonia nitrogen; The first coarse filtration layer and the second coarse filtration layer thickness be 10～20cm, its saturated coefficient of permeability is about 1～10cm/min;
Said first filter bed of essence and second filter bed of essence all are mixolimnions that fine sand and active earths are formed, and it mainly acts on is further to remove pollutents such as organism in the sewage, TP, ammonia nitrogen, guarantees the effluent quality qualified discharge; The thickness of first filter bed of essence and second filter bed of essence is 20～30cm, and its saturated coefficient of permeability is about 10
-2～10
-1Cm/s;
Said water conservancy diversion layer is that the gravel particle diameter is the gravel bed of 20～40mm, and gravel bed thickness is 15～20cm, and the antiseepage processing is done in its bottom;
It is the pvc pipe of 5～16cm that said water spraying pipe, aproll vent-pipe and draining exhaust duct all adopt caliber;
The exit of said submersible sewage pump is provided with the first one-in-and-two-out T-valve, and two outlets of the first one-in-and-two-out T-valve are connected with the aproll vent-pipe with water spraying pipe respectively;
The exit end of said draining exhaust duct is provided with the second one-in-and-two-out T-valve, and two outlets of the second one-in-and-two-out T-valve are connected with the sampling pond with the water-in of anaerobism settling tank respectively;
The set height of water outlet of diafiltration module is higher than the water-in of anaerobism settling tank under the said artificial soil.
Can realize infiltration water treatment method under the artificial soil of a kind of efficient denitrification through above-mentioned WWT composite system, may further comprise the steps:
(1) take pending sewage sample, and the TN concentration in the test sample;
(2) according to the detected result of step (1), regulate the water outlet flow of diafiltration module under the artificial soil, controlling flow is to the ratio of recirculation water with the discharge water that flows to the sampling pond of anaerobism settling tank water-in;
(3) pending sewage is sent into grating tank, after grating tank is removed floating refuse, obtain raw waste water;
(4) from the raw waste water of grating tank with from inflow anaerobism settling tank after the recirculation water mixing of diafiltration module under the artificial soil; The mixed solution of raw waste water and recirculation water stops 3～5h and carries out the anaerobic denitrifying denitrogenation in the anaerobism settling tank; Remove the mud granule in the raw waste water simultaneously, and at a distance from removing the oil slick in the raw waste water;
The mixed solution that (5) will pass through the anaerobic denitrifying denitrogenation is then sent into equalizing tank; Submersible sewage pump by being located at the equalizing tank bottom is delivered to diafiltration module under the artificial soil with mixture pump; After mixed solution carries out cascade filtration through diafiltration module under the artificial soil, be divided into recirculation water and discharge water is seen off respectively.
In the said step (2), if the detected result of step (1) is TN concentration≤40mg/L, then system's reflux ratio is decided to be 100%; If the detected result of step (1) is TN concentration＞40mg/L, then system's reflux ratio is 100%～200%; Reflux ratio is the ratio of recirculation water flow and sewage flooding velocity.
In the said step (5), submersible sewage pump is sent into first filtering layer in the diafiltration module and second filtering layer under the artificial soil with mixed solution respectively according to 60% and 40% ratio;
In first filtering layer, mixed solution is distributed in the aproll layer through water spraying pipe, filters through the first coarse filtration layer, first filter bed of essence, aproll ventilating layer, the second coarse filtration layer and second filter bed of essence successively then, finally gets into the water conservancy diversion layer and is seen off by the draining exhaust duct;
In second filtering layer, mixed solution is distributed in the aproll ventilating layer through the aproll vent-pipe, filters through the second coarse filtration layer and second filter bed of essence successively then, finally gets into the water conservancy diversion layer and is seen off by the draining exhaust duct;
Submersible sewage pump is an intermittent type to the pumping of mixed solution, and promptly submersible sewage pump is carried the air in first filtering layer and second filtering layer the pumping of mixed solution in first filtering layer and second filtering layer and blower fan and hocketed.
When diafiltration WWT composite system and method are used under the artificial soil of this efficient denitrification; Its principle is: the subsurface infiltration unit design is become aerobic unit; Send the oxygen mode to make in the system aerobic bacteria keep higher activity through optimize ventilating, thereby guarantee COD, BOD in the water outlet
5, NH
4 +Oxygen consumption indexs such as-N all can reach or be superior to GB18918-2002 one-level category-A emission standard.Under artificial soil in the filtration system, organonitrogen in the sewage and NH
4 +-N is converted into NH through ammonification, nitrosification and nitrification respectively
4 +-N, NO
2 --N and NO
3 --N, newly-generated NH
4 +-N changes into NO through nitrification again
3 --N.Owing to do not build the undersupply of anaerobic environment and carbon source, cause a little less than the denitrification very NO in its water outlet
3 --N concentration is still higher, can not qualified discharge.For this reason; Diafiltration WWT composite system is arranged on anaerobic zone under the artificial soil in the anaerobism settling tank outside the diafiltration module under the artificial soil of this efficient denitrification; This pond hangs with elastic filler; The water outlet of the unpowered backflow part of diafiltration module water outlet gets into the anaerobism settling tank under the artificial soil, and denitrifying bacteria utilizes organism in the raw waste water as carbon source, with a large amount of NO that bring in the phegma
3 --N is reduced to N
2Discharge; Thereby reach the purpose of removing total nitrogen, such design not only can effectively reduce the amount (for example SS, TN, organism etc.) that gets into diafiltration module pollutent under the artificial soil, improves its pollution load; And make its more difficult obstruction, prolonged work-ing life.Can produce mud in the anaerobism settling tank, but amount and little, cleaning in to two year once gets final product according to practical situation in application, and maintenance management is simple and convenient.
The utility model has following beneficial effect with respect to prior art:
Diafiltration WWT composite system and method can be set different reflux ratios according to the TN concentration in the sewage under the artificial soil of this efficient denitrification, are guaranteeing that under other index situation up to standard, efficient denitrification satisfies the environmental requirement that improves day by day targetedly.Simultaneously, the utility model management maintenance is easy, and construction and working cost are low, and effluent quality is good, can not endanger surrounding environment and view.And the not only main effect of performance aspect denitrification denitrogenation of anaerobism settling tank, (removals of TSS, organism etc.) also have important effect aspect the diafiltration module influent quality improving under the artificial soil simultaneously, thereby have guaranteed the permanent stable operation in this unit.
This system compares with subsurface infiltration Sewage treatment systems before, and the clearance of total nitrogen obviously improves, and its sewage load increase greatly, thereby reduces system's floor space and construction investment.The reflux ratio of supposing system is by 100% calculating, and then the working cost of one ton of sewage of this composite system processing is less than 0.12 yuan.
Diafiltration WWT composite system floor space is little under the artificial soil of the efficient denitrification of the utility model, safeguard simple, working cost is low, can be applied to urban cells, samll cities and towns and the Rural areas five equilibrium residence district of living scattered preferably.
Description of drawings
Fig. 1 is the structural representation of diafiltration WWT composite system under the artificial soil of this efficient denitrification.
Fig. 2 is the structural representation of diafiltration module under the artificial soil.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is done further to specify, but the embodiment of the utility model is not limited thereto.
Embodiment
Diafiltration WWT composite system under the artificial soil of a kind of efficient denitrification of present embodiment, as shown in Figure 1, comprise diafiltration module 4 and sampling pond 5 under the grating tank 1 that connects successively, anaerobism settling tank 2, equalizing tank 3, the artificial soil; The water-in of grating tank 1 is the sewage import, and the water outlet of diafiltration module 4 is connected with sampling pond 5 with the water-in of anaerobism settling tank 2 respectively under the artificial soil; The bottom of equalizing tank 3 is provided with submersible sewage pump, and submersible sewage pump is connected through diafiltration module 4 under pipeline and the artificial soil.
As shown in Figure 2; Diafiltration module 4 comprises the tectum 6 that sets gradually, aproll layer 7, the first coarse filtration layer 8, first filter bed of essence 9, aproll ventilating layer 10, the second coarse filtration layer 11, second filter bed of essence 12 and water conservancy diversion layer 13 from top to bottom under the artificial soil; Aproll layer 7, the first coarse filtration layer 8 and first filter bed of essence 9 are formed first filtering layer, and aproll ventilating layer 10, the second coarse filtration layer 11 and second filter bed of essence 12 are formed second filtering layer; Be provided with water spraying pipe 14 in the aproll layer 7, be provided with aproll vent-pipe 15 in the aproll ventilating layer 10, be provided with draining exhaust duct 16 in the water conservancy diversion layer 13; Water spraying pipe 14 is connected with submersible sewage pump through the pvc pipe road respectively with aproll vent-pipe 15, and also through the external blower fan in pvc pipe road, the exit end of draining exhaust duct 16 is the water outlet of diafiltration module under the artificial soil to aproll vent-pipe 15; The structure of water spraying pipe 14 and aproll vent-pipe 15 all is that end sealing and pipe shaft are provided with apron hole, and the structure of draining exhaust duct 16 is that an end opens wide and pipe shaft is provided with gully-hole.When diafiltration module was filtered under the artificial soil, the apron hole on the water spraying pipe played the effect of water distribution uniformity, and the apron hole on the aproll vent-pipe alternately plays water distribution uniformity and airy effect, and the gully-hole on the draining exhaust duct alternately plays the effect of air draft and draining.
In the aproll intermittent phase; Blower fan is sent into fresh air in the aproll ventilating layer 10 via aproll vent-pipe 15; Respectively laterally and in upper strata, lower floor's filtrate, migrate, the air that simultaneously oxygen level in the filtrate is reduced is discharged from water spraying pipe 14 and draining exhaust duct 16 respectively, accomplishes the oxygen supply of system afterwards.
The first coarse filtration layer 8 and the second coarse filtration layer 11 all are mixolimnions that fine sand and zeolite are formed, and it mainly acts on is to remove organism, suspended substance and ammonia nitrogen; The thickness of the first coarse filtration layer and the second coarse filtration layer is 10～20cm, and its saturated coefficient of permeability is about 1～10cm/min;
First filter bed of essence 9 and second filter bed of essence 12 all are mixolimnions that fine sand and active earths are formed, and it mainly acts on is further to remove pollutents such as organism in the sewage, TP, ammonia nitrogen, guarantees the effluent quality qualified discharge; The thickness of first filter bed of essence and second filter bed of essence is 20～30cm, and its saturated coefficient of permeability is about 10
-2～10
-1M/s;
Water conservancy diversion layer 13 is that the gravel particle diameter is the gravel bed of 20～40mm, and gravel bed thickness is 15～20cm, and the antiseepage processing is done in its bottom.
It is the pvc pipe of 5～16cm that water spraying pipe 14, aproll vent-pipe 15 and draining exhaust duct 16 all adopt caliber.
The exit of submersible sewage pump is provided with the first one-in-and-two-out T-valve, and two outlets of the first one-in-and-two-out T-valve are connected with the aproll vent-pipe with water spraying pipe respectively;
The exit end of draining exhaust duct is provided with the second one-in-and-two-out T-valve, and two outlets of the second one-in-and-two-out T-valve are connected with the sampling pond with the water-in of anaerobism settling tank respectively.
In order to practice thrift working cost, realize that recirculation water flows back to the anaerobism settling tank by deadweight, the set height of the water outlet of diafiltration module is higher than the water-in of anaerobism settling tank under the artificial soil.
Present embodiment can be realized infiltration water treatment method under the artificial soil of a kind of efficient denitrification through above-mentioned WWT composite system, may further comprise the steps:
(1) take pending sewage sample, and the TN concentration in the test sample;
(2) according to the detected result of step (1), regulate the water outlet flow of diafiltration module under the artificial soil, controlling flow is to the ratio of recirculation water with the discharge water that flows to the sampling pond of anaerobism settling tank water-in;
(3) pending sewage is sent into grating tank, after grating tank is removed floating refuse, obtain raw waste water;
(4) from the raw waste water of grating tank with from inflow anaerobism settling tank after the recirculation water mixing of diafiltration module under the artificial soil; The mixed solution of raw waste water and recirculation water stops 3～5h and carries out the anaerobic denitrifying denitrogenation in the anaerobism settling tank; Remove the mud granule in the raw waste water simultaneously, and at a distance from removing the oil slick in the raw waste water;
The mixed solution that (5) will pass through the anaerobic denitrifying denitrogenation is then sent into equalizing tank; Submersible sewage pump by being located at the equalizing tank bottom is delivered to diafiltration module under the artificial soil with mixture pump; After mixed solution carries out cascade filtration through diafiltration module under the artificial soil, be divided into recirculation water and discharge water is seen off respectively.
In the step (2), if the detected result of step (1) is TN concentration≤40mg/L, then system's reflux ratio is decided to be 100%; If the detected result of step (1) is TN concentration＞40mg/L, then the reflux ratio of system is 100%～200%; Reflux ratio is the ratio of recirculation water flow and sewage flooding velocity.
In the step (5), submersible sewage pump is sent into first filtering layer in the diafiltration module and second filtering layer under the artificial soil with mixed solution respectively according to 60% and 40% ratio;
In first filtering layer, mixed solution is distributed in the aproll layer through water spraying pipe, filters through the first coarse filtration layer, first filter bed of essence, aproll ventilating layer, the second coarse filtration layer and second filter bed of essence successively then, finally gets into the water conservancy diversion layer and is seen off by the draining exhaust duct;
In second filtering layer, mixed solution is distributed in the aproll ventilating layer through the aproll vent-pipe, filters through the second coarse filtration layer and second filter bed of essence successively then, finally gets into the water conservancy diversion layer and is seen off by the draining exhaust duct;
Submersible sewage pump is an intermittent type to the pumping of mixed solution, and promptly submersible sewage pump is carried the air in first filtering layer and second filtering layer the pumping of mixed solution in first filtering layer and second filtering layer and blower fan and hocketed.
When diafiltration WWT composite system and method are used under the artificial soil of this efficient denitrification; Its principle is: the subsurface infiltration unit design is become aerobic unit; Send the oxygen mode to make in the system aerobic bacteria keep higher activity through optimize ventilating, thereby guarantee COD, BOD in the water outlet
5, NH
4 +Oxygen consumption indexs such as-N all can reach or be superior to GB18918-2002 one-level category-A emission standard.Under artificial soil in the filtration system, organonitrogen in the sewage and NH
4 +-N is converted into NH through ammonification, nitrosification and nitrification respectively
4 +-N, NO
2 --N and NO
3 --N, newly-generated NH
4 +-N changes into NO through nitrification again
3 --N.Owing to do not build the undersupply of anaerobic environment and carbon source, cause a little less than the denitrification very NO in its water outlet
3 --N concentration is still higher, can not qualified discharge.For this reason; Diafiltration WWT composite system is arranged on anaerobic zone under the artificial soil in the anaerobism settling tank outside the diafiltration module under the artificial soil of this efficient denitrification; This pond hangs with elastic filler; The water outlet of the unpowered backflow part of diafiltration module water outlet gets into the anaerobism settling tank under the artificial soil, and denitrifying bacteria utilizes organism in the raw waste water as carbon source, with a large amount of NO that bring in the phegma
3 --N is reduced to N
2Discharge; Thereby reach the purpose of removing total nitrogen, such design not only can effectively reduce the amount (for example SS, TN, organism etc.) that gets into diafiltration module pollutent under the artificial soil, improves its pollution load; And make its more difficult obstruction, prolonged work-ing life.Can produce mud in the anaerobism settling tank, but amount and little, cleaning in to two year once gets final product according to practical situation in application, and maintenance management is simple and convenient.
Be specially: pending sewage at first passes through grating tank; Remove floating refuses such as plastics bag, branch, afterwards and mix the back from the recirculation water of diafiltration module under the artificial soil and flow into anaerobism settling tank bottom, in the anaerobism settling tank, stop reaction 3～5 hours (the anaerobism settling tank mainly contain three aspect effect: at first be the anaerobic denitrifying denitrogenation; Diafiltration module is the aerobic leading system that accounts under the artificial soil; Therefore it is nitrated very thorough, and the C/N ratio that recirculation water and raw waste water mix in the solution of back maintains between 2～5, and dissolved oxygen is lower than 0.5mg/L; Be aided with enough residence time again, make denitrifying bacteria can utilize organism in the raw waste water as carbon source with NO
3 --N is reduced to N
2Discharge, thereby reach the purpose of removing total nitrogen, meanwhile, contaminants associated in the raw waste water also is removed; Secondly, rely on deposition and adsorption to remove the thinner mud of particle in the sewage, alleviate the pollutant load of diafiltration module under the artificial soil; At last, the anaerobism settling tank also has the oil removal function.The mixed solution of handling through the anaerobism settling tank flows into equalizing tank, and submersible sewage pump in this pond is intermittent to be transported to it under artificial soil in the diafiltration module by placing.In the diafiltration module, first filtering layer and second filtering layer are worked simultaneously under artificial soil; The dirt-removing functions layer mainly is the first coarse filtration layer, first filter bed of essence, the second coarse filtration layer and second filter bed of essence; And the aproll ventilating layer has the airy function concurrently in the aproll gap; After fresh air gets into this layer; Respectively upwards with migration downwards, with reducing air preset draining exhaust duct discharge in tectum and the water conservancy diversion layer, thereby reach oxygen supply purpose to system; Wherein the cloth water yield ratio of water spraying pipe and aproll vent-pipe is controlled to be 3: 2.
Diafiltration WWT composite system imports the anaerobism settling tank through recirculation water under the artificial soil of this efficient denitrification; Not only improved nitric efficiency; And because dilution and reactivity, the sewage that has increased substantially diafiltration module under the artificial soil is loaded, and makes its hydraulic load can reach 0.9t/ (m
2D), calculate, be equivalent to handle every square metre of every day the raw waste water 0.45t of not diluted with 100% reflux ratio.Working cost then is lower than 0.12 yuan/ton, and system's effluent quality all can reach or be superior to GB18918-2002 one-level category-A emission standard.
As stated, can realize preferably that just the utility model, the foregoing description are merely the preferred embodiment of the utility model, be not the practical range that is used for limiting the utility model; Be that all equalizations of being done according to the utility model content change and modification, all contained by the utility model claim scope required for protection.
Claims (6)
1. diafiltration WWT composite system under the artificial soil of efficient denitrification is characterized in that, comprises diafiltration module under grating tank, anaerobism settling tank, equalizing tank and the artificial soil that connects successively; The water-in of grating tank is the sewage import, and the water outlet of diafiltration module is connected with the sampling pond with the water-in of anaerobism settling tank respectively under the artificial soil; Equalizing tank bottom is provided with submersible sewage pump, and submersible sewage pump is connected through diafiltration module under pipeline and the artificial soil.
2. diafiltration WWT composite system under the artificial soil of efficient denitrification according to claim 1; It is characterized in that; Diafiltration module comprises tectum, aproll layer, the first coarse filtration layer, first filter bed of essence, aproll ventilating layer, the second coarse filtration layer, second filter bed of essence and the water conservancy diversion layer that sets gradually from top to bottom under the said artificial soil; Aproll layer, the first coarse filtration layer and first filter bed of essence are formed first filtering layer, and aproll ventilating layer, the second coarse filtration layer and second filter bed of essence are formed second filtering layer; Be provided with water spraying pipe in the aproll layer, be provided with the aproll vent-pipe in the aproll ventilating layer, be provided with the draining exhaust duct in the water conservancy diversion layer; Water spraying pipe is connected with submersible sewage pump through the pvc pipe road respectively with the aproll vent-pipe, and also through the external blower fan in pvc pipe road, the exit end of draining exhaust duct is the water outlet of diafiltration module under the artificial soil to the aproll vent-pipe; The structure of water spraying pipe and aproll vent-pipe all is that end sealing and pipe shaft are provided with apron hole, and the structure of draining exhaust duct is that an end opens wide and pipe shaft is provided with gully-hole.
3. diafiltration WWT composite system under the artificial soil of efficient denitrification according to claim 2 is characterized in that said tectum is original position soil layer, cement layer or floor tile layer;
Said aproll layer and aproll ventilating layer all are that thickness is the gravel bed of 10～15cm, and the particle diameter of gravel bed cobble-stone is 5～40mm;
The said first coarse filtration layer and the second coarse filtration layer thickness be 10～20cm;
The thickness of said first filter bed of essence and second filter bed of essence is 20～30cm;
Said water conservancy diversion layer is that the gravel particle diameter is the gravel bed of 20～40mm, and the thickness of gravel bed is 15～20cm.
4. diafiltration WWT composite system under the artificial soil of efficient denitrification according to claim 2 is characterized in that it is the pvc pipe of 5～16cm that said water spraying pipe, aproll vent-pipe and draining exhaust duct all adopt caliber.
5. diafiltration WWT composite system under the artificial soil of efficient denitrification according to claim 2; It is characterized in that; The exit of said submersible sewage pump is provided with the first one-in-and-two-out T-valve, and two outlets of the first one-in-and-two-out T-valve are connected with the aproll vent-pipe with water spraying pipe respectively;
The exit end of said draining exhaust duct is provided with the second one-in-and-two-out T-valve, and two outlets of the second one-in-and-two-out T-valve are connected with the sampling pond with the water-in of anaerobism settling tank respectively.
6. diafiltration WWT composite system under the artificial soil of efficient denitrification according to claim 1 is characterized in that the set height of water outlet of diafiltration module is higher than the water-in of anaerobism settling tank under the said artificial soil.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102503036A (en) * | 2011-11-09 | 2012-06-20 | 中国科学院广州地球化学研究所 | High-efficiency denitrification artificial soil subsurface infiltration sewage treatment composite system and method |
| CN114524589A (en) * | 2022-03-04 | 2022-05-24 | 贵州中化新能源开发有限公司 | Ecological low-energy-consumption high-efficiency laminated percolation sewage treatment system and method |
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2011
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102503036A (en) * | 2011-11-09 | 2012-06-20 | 中国科学院广州地球化学研究所 | High-efficiency denitrification artificial soil subsurface infiltration sewage treatment composite system and method |
| CN114524589A (en) * | 2022-03-04 | 2022-05-24 | 贵州中化新能源开发有限公司 | Ecological low-energy-consumption high-efficiency laminated percolation sewage treatment system and method |
| CN114524589B (en) * | 2022-03-04 | 2023-10-10 | 贵州中化新能源开发有限公司 | Ecological low-energy-consumption efficient laminated infiltration sewage treatment system and method |
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