CN105152467A - Intensive deep decontamination and denitrification treatment system and method for domestic sewage - Google Patents
Intensive deep decontamination and denitrification treatment system and method for domestic sewage Download PDFInfo
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Abstract
The invention designs an intensive deep decontamination and denitrification treatment system and method for domestic sewage. The intensive deep decontamination and denitrification treatment system comprises an ultra-deep anaerobic pond, a tidal flow constructed wetland and a land enhanced filtration system, wherein the ultra-deep anaerobic pond is mainly used for precipitation and hydrolyze acidification reaction to remove particulate pollutants and macromolecular organic pollutants; the tidal flow constructed wetland adopts a tidal upward flow operation mode for water feeding, improves the activity of microbes and further improves removal of the pollutants; the land enhanced filtration system is formed by stacking two stages of structures which are isolated by water-tight non-woven geotextile in the middle, filler of a first-stage filtration system comprises soil, grass carbon and/or coarse sand and gravel sequentially from top to bottom, and filler of a second-stage filtration system comprises coarse sand, the grass carbon and/or coarse sand and the gravel sequentially from top to bottom. The intensive deep decontamination and denitrification treatment system has the advantages of high treatment load, good decontamination and denitrification effects, low treatment cost and simplicity in operation.
Description
Technical field
The present invention relates to environmental engineering technical field of sewage, refer to the intensive degree of depth decontamination of one way of life sewage and denitrogenation processing System and method for particularly.
Technical background
Rural area and town domestic sewage have that organic concentration is high, daily variation factor is large, the feature of intermittently discharged, are unprocessedly directly discharged into river and lake, can cause serious water pollution.Live in concentrated communities due to China rural area and urban population simultaneously and relatively disperse, and economic level is lower, the pattern that can not sanitary sewage be adopted completely to focus on.Therefore, suit measures to local conditions to select the suitable and sewage disposal technology of economy, seem very important.Existing artificial swamp and land percolation system, have the features such as low cost, low working cost, convenient management, and its application prospect is extensive, but owing to lacking good aerobic and anaerobic environment, denitrification effect is desirable not to the utmost generally.
Summary of the invention
Object of the present invention will provide the intensive degree of depth decontamination of one way of life sewage and denitrogenation processing System and method for exactly, the processing load of this system and method is high, decontamination and denitrification effect is good, take up an area less, processing cost and final-period management expense low, simple to operate.
For realizing this object, the intensive degree of depth decontamination of one way of life sewage designed by the present invention and denitrogenation processing system, it is characterized in that: comprise ultra-deep anaerobic pond, tidal flow artificial wetland, reinforced land percolation system, the inside of described ultra-deep anaerobic pond is provided with rising pipe, the one-level sewage outlet of described rising pipe connects the one-level sewage inlet of tidal flow artificial wetland, the B-grade sewage outlet of described tidal flow artificial wetland by constant flow pump respectively with B-grade sewage first entrance of reinforced land percolation system, B-grade sewage second entrance connects, B-grade sewage first entrance of described reinforced land percolation system connects the first step filtration system of reinforced land percolation system by the first perforation water distributor, B-grade sewage second entrance of described reinforced land percolation system connects the second stage filtration system of reinforced land percolation system by the second perforation water distributor,
Described ultra-deep anaerobic pond is also provided with raw waste water entrance; The first step filtration system of described reinforced land percolation system is also provided with three grades of sewage first and exports, and the second stage filtration system of described reinforced land percolation system is also provided with three grades of sewage second and exports.
In technique scheme, the rising pipe top of described ultra-deep anaerobic pond is provided with strainer, first-class gauge and time relay valve is provided with in pipeline between the one-level sewage outlet of described rising pipe and the one-level sewage inlet of tidal flow artificial wetland, be provided with second gauge in B-grade sewage first entrance of described reinforced land percolation system and the first pipeline of boring a hole between water distributor, in B-grade sewage second entrance of described reinforced land percolation system and the second pipeline of boring a hole between water distributor, be provided with the 3rd under meter.
In technique scheme, the first step filtration system of described reinforced land percolation system is arranged on above the filtration system of the second stage, is provided with waterproof non-woven geotextile between described first step filtration system and second stage filtration system.
In technique scheme, the filler of described first step filtration system is followed successively by soil, the peat composed of rotten mosses and/or coarse sand, gravel from the top down.
In technique scheme, the filler of described second stage filtration system is followed successively by coarse sand, the peat composed of rotten mosses and/or coarse sand, gravel from the top down.
In technique scheme, the degree of depth of described ultra-deep anaerobic pond is 6 ~ 9m.
In technique scheme, described tidal flow artificial wetland adopts tide up stream mode to intake, and the top layer of described tidal flow artificial wetland is provided with ecological vegetable layer, and the inner matrix of described tidal flow artificial wetland is gravel.
In technique scheme, described tidal flow artificial wetland and reinforced land percolation system all adopt periodic running mode.
Utilize the intensive degree of depth decontamination of above-mentioned sanitary sewage and denitrogenation processing system to carry out a method for decontamination and denitrogenation, it is characterized in that, it comprises the steps:
Step 1: raw waste water enters ultra-deep anaerobic pond by raw waste water entrance, large particulate matter is removed through gravitational settling effect in ultra-deep anaerobic pond, and by acidication effect, macromole organic pollutant is changed into more labile small molecules organic pollutant, raw waste water obtains one-level sewage after removing particulate form pollutent and macromole organic pollutant;
Step 2: under the driving of the inner sewage horizontal plane of ultra-deep anaerobic pond and tidal flow artificial wetland surface elevation difference, one-level sewage enters the rising pipe of ultra-deep anaerobic pond by strainer, entered the one-level sewage inlet of tidal flow artificial wetland again by one-level sewage outlet, and control the flooding time of tidal flow artificial wetland by first-class gauge.
Step 3: be full of after water until tidal flow artificial wetland 5 and stop 3 ~ 12h, the microbial film that the organic pollutant in the one-level sewage now in tidal flow artificial wetland 5 is attached in matrix adsorbs and oxygenolysis, ammonia nitrogen (NH
3-N) be oxidized to nitric nitrogen or nitrite nitrogen (NO
3-N, NO
2-N), phosphorus by matrix absorption retain, carry out ion-exchange and anti-nitration reaction simultaneously, wherein in one-level sewage massfraction be 0.6 ~ 17.3% nitrogen and massfraction be 1.4 ~ 41.2% phosphorus be absorbed by plants, obtain B-grade sewage; B-grade sewage is promoted to reinforced land percolation system by constant flow pump by B-grade sewage outlet, the B-grade sewage wherein accounting for B-grade sewage total amount 50% is entered the first step filtration system of reinforced land percolation system by the first perforation water distributor by B-grade sewage first entrance, the B-grade sewage entering first step filtration system carries out aerobic decomposition, nitration reaction, anti-nitration reaction from top to bottom successively, remove organic pollutant, ammonia nitrogen and phosphorus, obtain the first system three grades of sewage; The B-grade sewage of remaining 50% is entered the second stage filtration system of land percolation system by the second perforation water distributor by B-grade sewage second entrance of reinforced land percolation system, the B-grade sewage entering second stage filtration system carries out that absorption retains, anti-nitration reaction, further denitrogenation dephosphorizing, obtain second system three grades of sewage, regulate second gauge, the 3rd under meter to ensure to enter the flooding time of first step filtration system and second stage filtration system simultaneously respectively;
Step 4: the first system three grades of sewage obtained through the process of first step filtration system are drained by three grades of sewage first outlets, the second system three grades of sewage obtained through second stage filtration system process are drained by three grades of sewage second outlets.
In technique scheme, in described step 3, the filling time of tidal flow artificial wetland is identical with the drain time of reinforced land percolation system in step 4.
Beneficial effect of the present invention is:
1, the ultra-deep anaerobic pond that the present invention is arranged can remove partial organic substances and particulate form pollutent, increases biodegradability and the capacity of resisting impact load of pollutent further.
2, the present invention utilizes difference of elevation and the time relay1 switch on the inner sewage horizontal plane of ultra-deep anaerobic pond and tidal flow artificial wetland surface, realize the unpowered tide mode of tidal flow artificial wetland to intake, the operating method of tide up stream can make current wetland oxygenation and microorganism growth good, thus make organic clearance and nitrated efficiency higher.
3, two-stage strengthening filtration system of the present invention adopts intermittent mode operation, add the capacity of resisting impact load of system, make second stage filtration system have good anaerobic environment, the peat composed of rotten mosses provides carbon source in addition simultaneously, make denitrification efficiency higher, thus denitrification effect is better.
Figure of description
Fig. 1 is the structural representation of the intensive degree of depth decontamination of sanitary sewage and denitrogenation processing system.
Wherein, 1-ultra-deep anaerobic pond, 1.1-raw waste water entrance, 2-strainer, 3-first-class gauge, 4-time relay valve, 5-tidal flow artificial wetland, 5.1-one-level sewage inlet, 5.2-B-grade sewage exports, 6-constant flow pump, 7-second gauge, 8-the three under meter, 9-reinforced land percolation system, 9.1-B-grade sewage first entrance, 9.2-B-grade sewage second entrance, 9.3-three grades of sewage first export, 9.4-three grades of sewage second export, 10-the first perforation water distributor, 11-the second perforation water distributor, 12-waterproof non-woven geotextile, 13-rising pipe, 14.1-first step filtration system, 14.2-second stage filtration system.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
The intensive degree of depth decontamination of one way of life sewage as shown in Figure 1 and denitrogenation processing system, comprise ultra-deep anaerobic pond 1, tidal flow artificial wetland 5, reinforced land percolation system 9, the inside of described ultra-deep anaerobic pond 1 is provided with rising pipe 13, the one-level sewage outlet 13.1 of described rising pipe 13 connects the one-level sewage inlet 5.1 of tidal flow artificial wetland 5, the B-grade sewage outlet 5.2 of described tidal flow artificial wetland 5 by constant flow pump 6 respectively with B-grade sewage first entrance 9.1 of reinforced land percolation system 9, B-grade sewage second entrance 9.2 connects, B-grade sewage first entrance 9.1 of described reinforced land percolation system 9 connects the first step filtration system 14.1 of reinforced land percolation system 9 by the first perforation water distributor 10, B-grade sewage second entrance 9.2 of described reinforced land percolation system 9 connects the second stage filtration system 14.2 of reinforced land percolation system 9 by the second perforation water distributor 11,
Described ultra-deep anaerobic pond 1 is also provided with raw waste water entrance 1.1; The first step filtration system 14.1 of described reinforced land percolation system 9 is also provided with three grades of sewage first and exports 9.3, and the second stage filtration system 14.2 of described reinforced land percolation system 9 is also provided with three grades of sewage second and exports 9.4.
In technique scheme, rising pipe 13 top of described ultra-deep anaerobic pond 1 is provided with strainer 2, first-class gauge 3 and time relay valve 4 is provided with in pipeline between the one-level sewage outlet 13.1 of described rising pipe 13 and the one-level sewage inlet 5.1 of tidal flow artificial wetland 5, be provided with second gauge 7 in B-grade sewage first entrance 9.1 of described reinforced land percolation system 9 and the first pipeline of boring a hole between water distributor 10, in B-grade sewage second entrance 9.2 of described reinforced land percolation system 9 and the second pipeline of boring a hole between water distributor 11, be provided with the 3rd under meter 8.
In technique scheme, above-mentioned first-class gauge 3, second gauge 7, the 3rd under meter 8 are all for measuring the correlation parameter of flow everywhere, determine whether native system runs in normal scope, there is deficiency or exceed correlation parameter, to regulate flow, thus the normal work of the system of guarantee.
In technique scheme, the first step filtration system 14.1 of described reinforced land percolation system 9 arranges (fixing) above second stage filtration system 14.2, waterproof non-woven geotextile 12 is provided with between described first step filtration system 14.1 and second stage filtration system 14.2, thus make second stage filtration system 14.2 anaerobic environment more good relative to first step filtration system 14.1, further enhance anti-nitration reaction.
In technique scheme, the filler of described first step filtration system 14.1 is followed successively by soil, the peat composed of rotten mosses and/or coarse sand, gravel from the top down, and the described peat composed of rotten mosses provides carbon source for anti-nitration reaction, and gravel is cheap easily to be obtained, in bottom mainly as substrate, prevent water outlet from blocking.
In technique scheme, the filler of described second stage filtration system 14.2 is followed successively by coarse sand, the peat composed of rotten mosses and/or coarse sand, gravel from the top down, and described coarse sand is conducive to increasing the infiltration rate of sewage, and the peat composed of rotten mosses provides carbon source for anti-nitration reaction.
In technique scheme, the degree of depth of described ultra-deep anaerobic pond 1 is 6 ~ 9m, is conducive to bed mud complete digestion.
In technique scheme, described tidal flow artificial wetland 5 adopts tide up stream mode to intake, be conducive to organism more reasonable layout under artificial swamp at the middle and upper levels, every layer of microorganism growth can be made better.The top layer of described tidal flow artificial wetland 5 is provided with ecological vegetable layer, and the inner matrix of described tidal flow artificial wetland 5 is gravel, is conducive to improving scavenging effect.
In technique scheme, described tidal flow artificial wetland 5 all adopts periodic running mode (intermittent time is 3 ~ 12h) with reinforced land percolation system 9.Reinforced land percolation system 9 adopts batch operation, adds the capacity of resisting impact load of system, and make second stage filtration system 14.2 have good anaerobic environment, the peat composed of rotten mosses provides carbon source simultaneously, make denitrification efficiency higher, thus denitrification effect is better.
Utilize the intensive degree of depth decontamination of above-mentioned sanitary sewage and denitrogenation processing system to carry out a method for decontamination and denitrogenation, it comprises the steps:
Step 1: raw waste water enters ultra-deep anaerobic pond 1 by raw waste water entrance 1.1, large particulate matter is removed through gravitational settling effect in ultra-deep anaerobic pond 1, and by acidication effect, macromole organic pollutant is changed into more labile small molecules organic pollutant, raw waste water obtains one-level sewage after removing particulate form pollutent and macromole organic pollutant;
Step 2: under the driving of the inner sewage horizontal plane of ultra-deep anaerobic pond 1 and tidal flow artificial wetland 5 surface elevation difference, one-level sewage enters the rising pipe 13 of ultra-deep anaerobic pond 1 by strainer 2, entered the one-level sewage inlet 5.1 of tidal flow artificial wetland 5 again by one-level sewage outlet 13.1, and control the flooding time (flooding time is 5 ~ 10min) of tidal flow artificial wetland 5 by first-class gauge 3;
Step 3: stop 3 ~ 12h after tidal flow artificial wetland 5 is full of water (according to the cycle of operation determined, calculate tidal flow artificial wetland to be full of and residence time after draining), the microbial film that organic pollutant in one-level sewage now in tidal flow artificial wetland 5 is attached in matrix adsorbs and oxygenolysis, ammonia nitrogen (NH
3-N) be oxidized to nitric nitrogen and nitrite nitrogen (NO by matrix
3-N, NO
2-N), phosphorus is retained by absorption, carries out ion-exchange and anti-nitration reaction simultaneously, wherein in one-level sewage massfraction be 0.6 ~ 17.3% nitrogen and massfraction be 1.4 ~ 41.2% phosphorus be absorbed by plants, obtain B-grade sewage, B-grade sewage is exported 5.2 by constant flow pump 6 by B-grade sewage and is promoted to reinforced land percolation system 9, the B-grade sewage wherein accounting for B-grade sewage total amount 50% is entered the first step filtration system 14.1 of reinforced land percolation system 9 by the first perforation water distributor 10 by B-grade sewage first entrance 9.1, the B-grade sewage entering first step filtration system 14.1 carries out aerobic decomposition, nitration reaction, anti-nitration reaction (carbon source needed for anti-nitration reaction is provided by the peat composed of rotten mosses) from top to bottom successively, remove organic pollutant, ammonia nitrogen and phosphorus, obtain the first system three grades of sewage, the B-grade sewage of remaining 50% is entered the second stage filtration system 14.2 of land percolation system 9 by the second perforation water distributor 11 by B-grade sewage second entrance 9.2 of reinforced land percolation system 9, the B-grade sewage entering second stage filtration system 14.2 carries out absorption and retains, anti-nitration reaction (carbon source needed for anti-nitration reaction is provided by the peat composed of rotten mosses), further denitrogenation dephosphorizing, obtain second system three grades of sewage, regulate second gauge 7 respectively simultaneously, 3rd under meter 8 is to control the flooding time (flooding time is for 5 ~ 10min) entering first step filtration system 14.1 and second stage filtration system 14.2,
Step 4: process through first step filtration system 14.1 the first system three grades of sewage obtained and export 9.3 by three grades of sewage first and drain, processes through second stage filtration system 14.2 the second system three grades of sewage obtained and exports 9.4 by three grades of sewage second and drain.
In technique scheme, in described step 3, the filling time of tidal flow artificial wetland 5 is identical with the drain time of reinforced land percolation system 9 in step 4, and both filling times and drain time are just in time in interleaved state, thus ensures that whole system is run continuously.
The content that specification sheets is not described in detail belongs to the known prior art of professional and technical personnel in the field.
Claims (10)
1. the intensive degree of depth decontamination of one way of life sewage and denitrogenation processing system, it is characterized in that: comprise ultra-deep anaerobic pond (1), tidal flow artificial wetland (5), reinforced land percolation system (9), the inside of described ultra-deep anaerobic pond (1) is provided with rising pipe (13), the one-level sewage outlet (13.1) of described rising pipe (13) connects the one-level sewage inlet (5.1) of tidal flow artificial wetland (5), B-grade sewage outlet (5.2) of described tidal flow artificial wetland (5) by constant flow pump (6) respectively with B-grade sewage first entrance (9.1) of reinforced land percolation system (9), B-grade sewage second entrance (9.2) connects, B-grade sewage first entrance (9.1) of described reinforced land percolation system (9) connects the first step filtration system (14.1) of reinforced land percolation system (9) by the first perforation water distributor (10), B-grade sewage second entrance (9.2) of described reinforced land percolation system (9) connects the second stage filtration system (14.2) of reinforced land percolation system (9) by the second perforation water distributor (11),
Described ultra-deep anaerobic pond (1) is also provided with raw waste water entrance (1.1); The first step filtration system (14.1) of described reinforced land percolation system (9) is also provided with three grades of sewage first and exports (9.3), and the second stage filtration system (14.2) of described reinforced land percolation system (9) is also provided with three grades of sewage second and exports (9.4).
2. the intensive degree of depth decontamination of sanitary sewage according to claim 1 and denitrogenation processing system, it is characterized in that: rising pipe (13) entrance of described ultra-deep anaerobic pond (1) is provided with strainer (2), first-class gauge (3) and time relay valve (4) is provided with in pipeline between the one-level sewage outlet (13.1) of described rising pipe (13) and the one-level sewage inlet (5.1) of tidal flow artificial wetland (5), second gauge (7) is provided with in the pipeline that B-grade sewage first entrance (9.1) and first of described reinforced land percolation system (9) is bored a hole between water distributor (10), the 3rd under meter (8) is provided with in the pipeline that B-grade sewage second entrance (9.2) and second of described reinforced land percolation system (9) is bored a hole between water distributor (11).
3. the intensive degree of depth decontamination of sanitary sewage according to claim 1 and denitrogenation processing system, it is characterized in that: the first step filtration system (14.1) of described reinforced land percolation system (9) is arranged on second stage filtration system (14.2) top, is provided with waterproof non-woven geotextile (12) between described first step filtration system (14.1) and second stage filtration system (14.2).
4. the intensive degree of depth decontamination of the sanitary sewage according to claim 1 or 3 and denitrogenation processing system, is characterized in that: the filler of described first step filtration system (14.1) is followed successively by soil, the peat composed of rotten mosses and/or coarse sand, gravel from the top down.
5. the intensive degree of depth decontamination of the sanitary sewage according to claim 1 or 3 and denitrogenation processing system, is characterized in that: the filler of described second stage filtration system (14.2) is followed successively by coarse sand, the peat composed of rotten mosses and/or coarse sand, gravel from the top down.
6. the intensive degree of depth decontamination of sanitary sewage according to claim 1 and 2 and denitrogenation processing system, is characterized in that: the degree of depth of described ultra-deep anaerobic pond (1) is 6 ~ 9m.
7. the intensive degree of depth decontamination of sanitary sewage according to claim 1 and 2 and denitrogenation processing system, it is characterized in that: described tidal flow artificial wetland (5) adopts tide up stream mode to intake, the top layer of described tidal flow artificial wetland (5) is provided with ecological vegetable layer, and the inner matrix of described tidal flow artificial wetland (5) is gravel.
8. the intensive degree of depth decontamination of sanitary sewage according to claim 1 and 2 and denitrogenation processing system, is characterized in that: described tidal flow artificial wetland (5) and reinforced land percolation system (9) all adopt periodic running mode.
9. utilize the intensive degree of depth decontamination of the sanitary sewage described in claim 1 and denitrogenation processing system to carry out a method for decontamination and denitrogenation, it is characterized in that, it comprises the steps:
Step 1: raw waste water enters ultra-deep anaerobic pond (1) by raw waste water entrance (1.1), large particulate matter is removed through gravitational settling effect in ultra-deep anaerobic pond (1), and by acidication effect, macromole organic pollutant is changed into more labile small molecules organic pollutant, raw waste water obtains one-level sewage after removing particulate form pollutent and macromole organic pollutant;
Step 2: under the driving of the inner sewage horizontal plane of ultra-deep anaerobic pond (1) and tidal flow artificial wetland (5) surface elevation difference, one-level sewage enters the rising pipe (13) of ultra-deep anaerobic pond (1) by strainer (2), entered the one-level sewage inlet (5.1) of tidal flow artificial wetland (5) again by one-level sewage outlet (13.1), and control the flooding time of tidal flow artificial wetland (5) by first-class gauge (3);
Step 3: tidal flow artificial wetland (5) stops 3 ~ 12h after being full of water, the microbial film that organic pollutant in one-level sewage now in tidal flow artificial wetland (5) is attached in matrix adsorbs and oxygenolysis, ammonia nitrogen is oxidized to nitric nitrogen and nitrite nitrogen, phosphorus is retained by matrix absorption, carry out ion-exchange and anti-nitration reaction simultaneously, wherein in one-level sewage massfraction be 0.6 ~ 17.3% nitrogen and massfraction be 1.4 ~ 41.2% phosphorus be absorbed by plants, obtain B-grade sewage, B-grade sewage is exported (5.2) by constant flow pump (6) by B-grade sewage and is promoted to reinforced land percolation system (9), the B-grade sewage wherein accounting for B-grade sewage total amount 50% is entered the first step filtration system (14.1) of reinforced land percolation system (9) by the first perforation water distributor (10) by B-grade sewage first entrance (9.1), the B-grade sewage entering first step filtration system (14.1) carries out aerobic decomposition from top to bottom successively, nitration reaction, anti-nitration reaction, remove organic pollutant, ammonia nitrogen and phosphorus, obtain the first system three grades of sewage, the B-grade sewage of remaining 50% is entered the second stage filtration system (14.2) of land percolation system (9) by the second perforation water distributor (11) by B-grade sewage second entrance (9.2) of reinforced land percolation system (9), the B-grade sewage entering second stage filtration system (14.2) carries out absorption and retains and anti-nitration reaction, further denitrogenation dephosphorizing, obtains second system three grades of sewage, regulate second gauge (7), the 3rd under meter (8) to control the flooding time entering first step filtration system (14.1) and second stage filtration system (14.2) respectively simultaneously,
Step 4: process through first step filtration system (14.1) the first system three grades of sewage obtained and export (9.3) by three grades of sewage first and drain, processes through second stage filtration system (14.2) the second system three grades of sewage obtained and exports (9.4) by three grades of sewage second and drain.
10. the intensive degree of depth decontamination of sanitary sewage according to claim 9 and denitrifying method, is characterized in that: in described step 3, the filling time of tidal flow artificial wetland (5) is identical with the drain time of reinforced land percolation system (9) in step 4.
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