CN103641241B - Preposed denitrification aeration biofilter and method for treating sewage - Google Patents
Preposed denitrification aeration biofilter and method for treating sewage Download PDFInfo
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- CN103641241B CN103641241B CN201310694623.9A CN201310694623A CN103641241B CN 103641241 B CN103641241 B CN 103641241B CN 201310694623 A CN201310694623 A CN 201310694623A CN 103641241 B CN103641241 B CN 103641241B
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Abstract
The invention discloses a preposed denitrification aeration biofilter and a method for treating sewage and belongs to the field of wastewater treatments. The biofilter comprises a DN tank body and a CN tank body and further comprises a first water storage tank body, a second water storage tank body and an aeration pump, wherein a first water storage tank inner cylinder is placed in the middle of the first water storage tank body; an annular water storage tank buffering groove is arranged at the outer side of the first water storage tank inner cylinder; the height of the water storage tank buffering groove is lower than that of the first water storge tank inner cylinder; and the area between the side wall of the first water storage tank body and the first water storge tank inner cylinder is a first water storage tank storage area. As the water flowing direction of the DN tank is upward, suspended solids are prevented from concentrating in a filler layer, the dirt containing rate of a filler is increased, and backwashing interval time is prolonged. By adopting the preposed denitrification aeration biofilter, the dissolved oxygen of the feeding water of the CN tank can be improved without power, so that subsequent additional oxygen supply amount is reduced; and the preposed denitrification aeration biofilter has the advantages of simple structure, convenient operation and low energy consumption.
Description
Technical field
The invention belongs to field of waste water treatment, specifically, a kind of method relating to pre-denitrification biological aerated filter and dispose of sewage, more particularly, a kind of method relating to pre-denitrification biological aerated filter for the sewage disposal containing organism, ammonia nitrogen and dispose of sewage.
Background technology
Biological filter system, due to advantages such as its floor space are little, maintenance cost is low, easy to operate, operational management is convenient, flexible, has been widely used in sewage water denitrification process.Though independent Up-flow Biological Aerated Filter has higher clearance to ammonia nitrogen, very low to the clearance of total nitrogen.In order to increase the clearance to total nitrogen, the normal mode combined running of multiple filter tanks parallel connection that adopts carries out nitration denitrification denitrogenation.Rear-mounted denitrification filter tank usually also exists the problem of carbon source deficiency in the denitrification stage, needs additional carbon, and Prepositive denitrification bio-filter denitrification stage microorganism can utilize organism in sewage as carbon source.Therefore, sufficient and need the sanitary sewage of denitrogenation for organism, consider that front establishment method is with the obvious advantage from running cost.
Pre-denitrification biological aerated filter is formed by anoxic denitrification biological filter (DN pond) and aerobic nitrification biological filter (CN pond) series combination.The Main Function in CN pond is that influent ammonia nitrogen is changed into nitrate nitrogen and cultured water.DN pond is mainly used to denitrification denitrogenation, and the nitrate nitrogen in the phegma of CN pond and cultured water are reduced to nitrogen.Nitrobacteria is aerobic bacteria, and reaction must be carried out under good oxygen condition, and dissolved oxygen has restraining effect to denitrification process, and microorganism denitrification needs to keep strict anoxia condition.
Because the water inlet of Prepositive denitrification bio-filter CN pond is from the water outlet of DN pond, under the anaerobic environment of DN pond, water outlet DO is low, needs the aerobic environment in a certain amount of additional oxygen-supplying amount guarantee CN pond.In order to reduce aeration rate, save running cost, more thinking adopts efficient offering oxygen way to reduce energy consumption now.As application number a kind of pre-denitrification biological aerated filter disclosed in the utility model patent of 201020122796.5, the CN pond of application number pre-denitrification biological aerated filter disclosed in the utility model patent of 201120334591.8 all adopts to upper reaches to promote air water Homogeneous phase mixing, improves oxygen transfer efficiency; Application number is integrated pre-denitrification and denitrogenation biological filter sewerage treatment process disclosed in the patent of invention of 200910116556.6, application number pre-denitrification and denitrogenation biological filter group disclosed in the utility model patent of 200920171675.7 forms by DN pond and CN pond series combination, the water outlet of DN pond enters CN pond by rising pipe, and highly effective air diffuser system is to oxygen supply in the water of CN pond.
Though above-mentioned efficient offering oxygen way improves the transfer efficiency of oxygen, to a certain degree avoid the waste of outer oxygenation, but because CN pond water inlet dissolved oxygen is low, still need the aerobic environment that in a large amount of additional oxygen-supplying amount guarantee CN ponds, nitrobacteria is strict, simultaneously, also it is low to there is processing efficiency in existing treatment process, the problem that cost is high.
Summary of the invention
1. invent the technical problem that will solve
For needing the aerobic environment that in a large amount of additional oxygen-supplying amount guarantee CN ponds, nitrobacteria is strict in prior art, the problem that processing efficiency is low, add running cost, a kind of method pre-denitrification biological aerated filter being provided and disposing of sewage, CN pond water inlet dissolved oxygen can be improved, thus reduce the pre-denitrification biological aerated filter of subsequent additional oxygen-supplying amount, processing efficiency is higher simultaneously, and cost is lower.
2. technical scheme
Object of the present invention is achieved through the following technical solutions.
A kind of pre-denitrification biological aerated filter, comprises DN pond body and CN pond body, also comprises the first tank body, the second tank body and aeration pump; Described DN pond body interior comprises clear water zone, the extra large sand filtration bed of material, supporting layer and water distribution buffer zone from top to bottom successively; Described side, water distribution buffer zone is provided with water-in; The side of described clear water zone is also provided with effluent trough, is separated between effluent trough and clear water zone by water-stop sheet, and the height of water-stop sheet is lower than the height of DN pond bodies top; The side of described clear water zone is also provided with DN pond back flushing water shoot; A first tank inner core is placed with in the middle part of the first described tank body; The arranged outside of the first described tank inner core has a ring-type tank dashpot, and the height of tank dashpot is lower than the height of the first tank inner core; Region between the sidewall of the first described tank body and the first tank inner core is the first tank water reserve; Described CN pond body interior comprises water distributor, buffer layer, zeolite filler layer, cloth gas-bearing formation and supporting layer from top to bottom successively, and the sidepiece of described buffer layer is connected with a CN pond back flushing water shoot; Described effluent trough is connected with the first tank inner core by a pipeline; The first described tank body is connected with water distributor by pipeline, and this pipeline is also provided with intake pump; The first described tank inner core is connected with water distribution buffer zone by a pipeline, and this pipeline is provided with the second water pump; The bottom of described CN pond body is connected with the second tank body; The second described tank body is connected with water distribution buffer zone by pipeline, and this pipeline is also provided with the first water pump; Described CN pond body bottom portion is connected with aeration pump.The water (flow) direction in DN pond of the present invention adopts upward flow, and suspended substance can be avoided to concentrate in packing layer, strengthens filler and receives dirty rate, extends back flushing interval time.
Preferably, the described extra large sand filtration bed of material is made up of extra large sand, selects particle diameter 2-3mm, density 2.54g/cm
3, porosity 2.23%, specific surface area 0.26m
2the extra large sand of/g.
Preferably, the thickness of the described extra large sand filtration bed of material is 1.5-1.7m.
Preferably, described zeolite filler layer is made up of zeolite, selects particle diameter 8-20mm, density 1.9-2.6g/cm
3, porosity of=48% and specific surface area 570-670m
2the zeolite of/g.Huge perch space because high-specific surface area and voidage provide, make a large amount of microorganic adhesion on filler, and at filling surface amount reproduction.
Preferably, the thickness of described zeolite filler layer is 1.4-1.6m.
Preferably, described water distributor is made up of main-arm-water distributing pore, and the downside of every root arm is evenly arranged the isodiametric apertures of pitch-row such as multiple.
Preferably, described supporting layer is made up of pebbles, pebbles particle diameter 2-6cm, density 2.65g/cm
3.
Utilize the method that pre-denitrification biological aerated filter is disposed of sewage, its step is as follows:
(1) sewage containing organism, ammonia nitrogen that need process maybe needs the sewage containing organism, ammonia nitrogen processed all to inject water distribution buffer zone with backflow nitrification liquid, upwards flow through the extra large sand filtration bed of material, in the sea sand filtration bed of material, denitrifying bacterium utilizes the organic carbon source in water inlet that the cultured water in phegma and nitrate nitrogen are reduced into nitrogen, realize denitrification denitrogenation, meanwhile, the suspended substance in sewage is trapped within the extra large sand filtration bed of material under the adsorption of filter material surface and micro organisms;
(2) the first tank inner core in the middle part of the first tank body is entered by effluent trough through clear water zone through the sewage of DN pond body process; Sewage is spilled over to tank dashpot from the first tank inner core, and then current flow out through the top of tank dashpot, and overflow water outlet waterfall flow to the first tank water reserve; From the first tank inner core to tank dashpot, then in the process of the first tank water reserve, can dissolve the oxygen in a large amount of air in water, sewage DO can be brought up to 2.22mg/L from 0.27 by the first tank inner core of this special construction; The moisture of the first tank body is two flow directions: one is the backwash water as Prepositive denitrification filter tank (DN pond body), and another kind enters CN pond body and carries out nitrification;
(3) make the sewage of the first tank body be sprayed to buffer layer by intake pump through water distributor, sewage is through the sprinkling process of water distributor, and DO brings up to 2.74mg/L from 2.22mg/L, opens aeration pump, makes sewage DO in the body of CN pond remain on 1.8-2.7mg/L; Zeolite layer nitrobacteria utilizes the ammonia nitrogen in water and DO to carry out nitration reaction, is nitrate nitrogen, cultured water by mineralized nitrogen; Aerobic bacteria utilizes DO in water to degrade further residual organic substances;
(4) make the body water outlet of CN pond enter the second tank body, part enters DN pond body as backflow nitrification liquid through the first water pump, and part is used for CN pond body backwashing water, all the other qualified discharges.
Preferably, also comprise step (5), the filtering layer blocking caused for avoiding the propagation of the SS because filtering layer retains and microorganism, DN pond body and CN pond body carry out back flushing.
Preferably, the back flushing of described DN pond body is spaced apart 7 days, and back flushing adopts water flushing method, time length 4min; Backwashing water intensity is 10L/ (s ﹒ m
2); The back flushing of described CN pond body is spaced apart 14 days, and back flushing adopts gas/water integrated processes, and gas/water is back flushing time length 3min simultaneously; Backwashing water intensity is 8L/ (s ﹒ m
2), gas intensity is 14L/ (s ﹒ m
2).
3. beneficial effect
Compared with prior art, the present invention has following remarkable advantage:
(1) structure design that device first tank body of the present invention is special and water distributor all add duration of contact and the area of sewage and air in sprinkling process, especially a first tank inner core is placed with in the middle part of the first tank body, the arranged outside of the first tank inner core has a ring-type tank dashpot, the height of tank dashpot is lower than the height of the first tank inner core, region between the sidewall of the first tank body and the first tank inner core is the first tank water reserve, make the water inlet dissolved oxygen of CN pond body can bring up to 2.74mg/L from 0.27mg/L like this, when a small amount of imposed aeration amount, (gas-water ratio 1.8-2.3) just can make CN pond sewage DO remain on 1.8-2.7mg/L,
(2) device and method of the present invention is compared with existing Prepositive denitrification bio-filter and treatment process, the present invention can unpowered raising CN pond water inlet dissolved oxygen, thus reduce subsequent additional oxygen-supplying amount, have that structure is simple, easy to operate, the advantage of less energy-consumption;
(3) in device of the present invention, DN pond filter material layer is made up of extra large sand, the extra large sand of this particle diameter, on the one hand as bio-carrier, for microorganism provides good life carrier, play a part filtration, because extra large sand has corrosion-resistant, particle shape rounding on the other hand, siliceous height, the feature that hardness is strong, can effectively catching water inlet in suspended substance, extend change the filtrate time;
(4) CN pond of the present invention filter material layer is made up of zeolite, because zeolite is to NH
4 +the strong adsorption effect of-N, especially particle diameter 8-20mm, density 1.9-2.6g/cm
3, porosity of=48% and specific surface area 570-670m
2the zeolite of/g, has stronger anti-ammonia nitrogen impact load ability;
(5) method of the present invention can unpowered raising CN pond water inlet dissolved oxygen, thus reduces subsequent additional oxygen-supplying amount, has that structure is simple, easy to operate, the advantage of less energy-consumption.
Accompanying drawing explanation
Fig. 1 is the structural representation of apparatus of the present invention.
In figure: 1, water distribution buffer zone; 2, supporting layer; 3, the extra large sand filtration bed of material; 4, DN pond body; 5, clear water zone; 6, effluent trough; 7, the first tank inner core; 8, tank dashpot; 9, the first tank water reserve; 10, the first tank body; 11, intake pump; 12, water distributor; 13, buffer layer; 14, zeolite filler layer; 15, CN pond body; 16, cloth gas-bearing formation; 17, the second tank body; 18, the first water pump; 19, the second water pump; 20, aeration pump; 21, DN pond back flushing water shoot; 22, CN pond back flushing water shoot.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described further.
Embodiment 1
As shown in Figure 1, a kind of pre-denitrification biological aerated filter, comprises DN pond body 4 and CN pond body 15, also comprises the first tank body 10, second tank body 17 and aeration pump 20; Body 4 inside, DN pond comprises clear water zone 5, the extra large sand filtration bed of material 3, supporting layer 2 and water distribution buffer zone 1 from top to bottom successively; Side, water distribution buffer zone 1 is provided with water-in; The side of clear water zone 5 is also provided with effluent trough 6, is separated between effluent trough 6 and clear water zone 5 by water-stop sheet, and the height of water-stop sheet is lower than the height at body 4 top, DN pond; The side of clear water zone 5 is also provided with DN pond back flushing water shoot 21; A first tank inner core 7 is placed with in the middle part of first tank body 10; The arranged outside of the first tank inner core 7 has a ring-type tank dashpot 8, and the height of tank dashpot 8 is lower than the height of the first tank inner core 7; Region between the sidewall of the first tank body 10 and the first tank inner core 7 is the first tank water reserve 9; Body 15 inside, CN pond comprises water distributor 12, buffer layer 13, zeolite filler layer 14, cloth gas-bearing formation 16 and supporting layer 2 from top to bottom successively, and the sidepiece of buffer layer 13 is connected with a CN pond back flushing water shoot 22; Effluent trough 6 is connected with the first tank inner core 7 by a pipeline; First tank body 10 is connected with water distributor 12 by pipeline, and this pipeline is also provided with intake pump 11; First tank inner core 7 is connected with water distribution buffer zone 1 by a pipeline, and this pipeline is provided with the second water pump 19; The bottom of CN pond body 15 is connected with the second tank body 17; Second tank body 17 is connected with water distribution buffer zone 1 by pipeline, this pipeline is also provided with the first water pump 18; Be connected with aeration pump 20 bottom CN pond body 15.
The sea sand filtration bed of material 3 is made up of extra large sand, selects particle diameter 2-3mm, density 2.54g/cm
3, porosity 2.23%, specific surface area 0.26m
2the extra large sand of/g.The thickness of the sea sand filtration bed of material 3 is 1.6m.Zeolite filler layer 14 is made up of zeolite, selects particle diameter 8-20mm, density 1.9-2.6g/cm
3, porosity of=48% and specific surface area 570-670m
2the zeolite of/g.The thickness of zeolite filler layer 14 is 1.5m.Water distributor 12 is made up of main-arm-water distributing pore, and the downside of every root arm is evenly arranged the isodiametric apertures of pitch-row such as 30.Supporting layer 2 is made up of pebbles, pebbles particle diameter 2-6cm, density 2.65g/cm
3.
The water (flow) direction of DN pond body 4 adopts upward flow, and hydraulic detention time is 0.3-0.8h; To stream under the water (flow) direction employing of described CN pond body 15, gas-water ratio is 1.8-2.3, mixed liquid recycle ratio 110-150%.Concrete working method is as follows:
(1) what need process contains organism, the sewage of ammonia nitrogen maybe need to process containing organism, the sewage of ammonia nitrogen all injects water distribution buffer zone 1 with backflow nitrification liquid (being that the sewage that need process all injects water distribution buffer zone 1 with backflow nitrification liquid after starting for some time), upwards flow through the extra large sand filtration bed of material 3, in the sea sand filtration bed of material 3, denitrifying bacterium utilizes the organic carbon source in water inlet that the cultured water in phegma and nitrate nitrogen are reduced into nitrogen, realize denitrification denitrogenation, simultaneously, suspended substance (SS) in sewage is trapped within the extra large sand filtration bed of material 3 under the adsorption of filter material surface and micro organisms,
(2) the first tank inner core 7 in the middle part of the first tank body 10 is entered by effluent trough 6 through clear water zone 5 through the sewage of DN pond body 4 process; Sewage is spilled over to tank dashpot 8 from the first tank inner core 7, and then current flow out through the top of tank dashpot 8, and overflow water outlet waterfall flow to the first tank water reserve 9; From the first tank inner core 7 to tank dashpot 8, then in the process of the first tank water reserve 9, can dissolve the oxygen in a large amount of air in water, sewage DO can be brought up to 2.22mg/L from 0.27 by the first tank inner core 7 of this special construction; The moisture of the first tank body 10 is two flow directions: one is the backwash water as Prepositive denitrification filter tank (DN pond body 4), and another kind enters CN pond body 15 and carries out nitrification;
(3) sewage of the first tank body is made to be sprayed to buffer layer 13 by intake pump 11 through water distributor 12, sewage is through the sprinkling process of water distributor 12, DO brings up to 2.74mg/L from 2.22mg/L, opens aeration pump 20, makes sewage DO in CN pond body 15 remain between 1.8-2.7mg/L; Zeolite layer nitrobacteria utilizes the ammonia nitrogen in water and DO to carry out nitration reaction, is nitrate nitrogen, cultured water by mineralized nitrogen; Aerobic bacteria utilizes DO in water to degrade further residual organic substances;
(4) make body 15 water outlet of CN pond enter the second tank body 17, part enters DN pond body 4 as backflow nitrification liquid through the first water pump 18, and part is used for CN pond body 15 backwashing water, all the other qualified discharges;
(5) the filtering layer blocking for avoiding the propagation of the SS because filtering layer retains and microorganism to cause, DN pond body 4 and CN pond body 15 need carry out back flushing.The back flushing of DN pond body 4 is spaced apart 7 days, and back flushing adopts water flushing method, time length 4min; Backwashing water intensity is 10L/ (s ﹒ m
2).The back flushing of CN pond body 15 is spaced apart 14 days, and back flushing adopts gas/water integrated processes, and gas/water is back flushing time length 3min simultaneously; Backwashing water intensity is 8L/ (s ﹒ m
2), gas intensity is 14L/ (s ﹒ m
2).
This process operating conditions: influent COD is 220 ± 30mg/L, TN is 30 ± 10mg/L, the temperature in operational process is 25 ± 8 DEG C, and the pH value of sewage is 7.5 ± 0.4.
This art breading effect: COD clearance is greater than 85%, is less than the requirement of 50mg/L for COD in one-level A standard that effluent quality reaches " urban wastewater treatment firm pollutant emission standard " (GB18918-2002); TN clearance is greater than 78%, in one-level A standard that effluent quality reaches " urban wastewater treatment firm pollutant emission standard " (GB18918-2002), TN is less than to the requirement of 15mg/L.
Method of the present invention is because zeolite is to NH
4 +-N has well absorption and ion-exchange capacity, even if water inlet is unstable, when ammonia nitrogen loading brings up to 40mg/L, water outlet ammonia nitrogen in CN pond is still stabilized within 6mg/L.
Embodiment 2
With embodiment 1, difference is the thickness of the extra large sand filtration bed of material 3 is 1.5m; The thickness of zeolite filler layer 14 is 1.6m.
Embodiment 3
With embodiment 1, difference is the thickness of the extra large sand filtration bed of material 3 is 1.7m; The thickness of zeolite filler layer 14 is 1.4m.
Claims (10)
1. a pre-denitrification biological aerated filter, comprise anoxic denitrification biological filter body (4) and aerobic nitrification biological filter body (15), it is characterized in that, also comprise the first tank body (10), the second tank body (17) and aeration pump (20); Described body (4) inside, anoxic denitrification biological filter comprises clear water zone (5), the extra large sand filtration bed of material (3), supporting layer (2) and water distribution buffer zone (1) from top to bottom successively; Described water distribution buffer zone (1) side is provided with water-in; The side of described clear water zone (5) is also provided with effluent trough (6), separated by water-stop sheet between effluent trough (6) and clear water zone (5), the height of water-stop sheet is lower than the height at body (4) top, anoxic denitrification biological filter; The side of described clear water zone (5) is also provided with anoxic denitrification biological filter back flushing water shoot (21); The first described tank body (10) middle part is placed with a first tank inner core (7); The arranged outside of the first described tank inner core (7) has a ring-type tank dashpot (8), and the height of tank dashpot (8) is lower than the height of the first tank inner core (7); Region between the sidewall of the first described tank body (10) and the first tank inner core (7) is the first tank water reserve (9); Described body (15) inside, aerobic nitrification biological filter comprises water distributor (12), buffer layer (13), zeolite filler layer (14), cloth gas-bearing formation (16) and supporting layer (2) from top to bottom successively, and the sidepiece of described buffer layer (13) is connected with an aerobic nitrification biological filter back flushing water shoot (22); Described effluent trough (6) is connected with the first tank inner core (7) by a pipeline; The first described tank body (10) is connected with water distributor (12) by pipeline, this pipeline is also provided with intake pump (11); The first described tank inner core (7) is connected with water distribution buffer zone (1) by a pipeline, and this pipeline is provided with the second water pump (19); The bottom of described aerobic nitrification biological filter body (15) is connected with the second tank body (17); The second described tank body (17) is connected with water distribution buffer zone (1) by pipeline, this pipeline is also provided with the first water pump (18); Described bottom, aerobic nitrification biological filter body (15) is connected with aeration pump (20).
2. a kind of pre-denitrification biological aerated filter according to claim 1, is characterized in that, the described extra large sand filtration bed of material (3) is made up of extra large sand, selects particle diameter 2-3mm, density 2.54g/cm
3, porosity 2.23%, specific surface area 0.26m
2the extra large sand of/g.
3. a kind of pre-denitrification biological aerated filter according to claim 2, is characterized in that, the thickness of the described extra large sand filtration bed of material (3) is 1.5-1.7m.
4. a kind of pre-denitrification biological aerated filter according to claim 1, is characterized in that, described zeolite filler layer (14) is made up of zeolite, selects particle diameter 8-20mm, density 1.9-2.6g/cm
3, porosity of=48% and specific surface area 570-670m
2the zeolite of/g.
5. a kind of pre-denitrification biological aerated filter according to claim 4, is characterized in that, the thickness of described zeolite filler layer (14) is 1.4-1.6m.
6. according to a kind of pre-denitrification biological aerated filter in claim 1-5 described in any one, it is characterized in that, described water distributor (12) is made up of main-arm-water distributing pore, and the downside of every root arm is evenly arranged the isodiametric apertures of pitch-row such as multiple.
7. according to a kind of pre-denitrification biological aerated filter in claim 1-5 described in any one, it is characterized in that, described supporting layer (2) is made up of pebbles, pebbles particle diameter 2-6cm, density 2.65g/cm
3.
8. utilize the method that pre-denitrification biological aerated filter is disposed of sewage, its step is as follows:
(1) sewage containing organism, ammonia nitrogen that need process all injects water distribution buffer zone (1) with backflow nitrification liquid, upwards flow through the extra large sand filtration bed of material (3), in the sea sand filtration bed of material (3), denitrifying bacterium utilizes the organic carbon source in water inlet that the cultured water in phegma and nitrate nitrogen are reduced into nitrogen, realize denitrification denitrogenation, meanwhile, the suspended substance in sewage is trapped within the extra large sand filtration bed of material (3) under the adsorption of filter material surface and micro organisms;
(2) sewage processed through anoxic denitrification biological filter body (4) enters the first tank inner core (7) at the first tank body (10) middle part through clear water zone (5) by effluent trough (6); Sewage is spilled over to tank dashpot (8) from the first tank inner core (7), and then current flow out through the top of tank dashpot (8), and overflow water outlet waterfall flow to the first tank water reserve (9); The moisture of the first tank body (10) is two flow directions: a kind of is backwash water as Prepositive denitrification filter tank, and another kind enters aerobic nitrification biological filter body (15) and carries out nitrification;
(3) sewage of the first tank body is made to be sprayed to buffer layer (13) by intake pump (11) through water distributor (12), open aeration pump (20), make the interior sewage DO in aerobic nitrification biological filter body (15) remain on 1.8-2.7mg/L; Zeolite layer nitrobacteria utilizes the ammonia nitrogen in water and DO to carry out nitration reaction, is nitrate nitrogen, cultured water by mineralized nitrogen; Aerobic bacteria utilizes DO in water to degrade further residual organic substances;
(4) body (15) water outlet of aerobic nitrification biological filter is made to enter the second tank body (17), part enters anoxic denitrification biological filter body (4) as backflow nitrification liquid through the first water pump (18), part is used for aerobic nitrification biological filter body (15) backwashing water, all the other qualified discharges.
9. a kind of method utilizing pre-denitrification biological aerated filter to dispose of sewage according to claim 8, it is characterized in that, also comprise step (5), back flushing is carried out in anoxic denitrification biological filter body (4) and aerobic nitrification biological filter body (15).
10. a kind of method utilizing pre-denitrification biological aerated filter to dispose of sewage according to claim 9, it is characterized in that, the back flushing of described anoxic denitrification biological filter body (4) is spaced apart 7 days, and back flushing adopts water flushing method, time length 4min; Backwashing water intensity is 10L/ (s ﹒ m
2); The back flushing of described aerobic nitrification biological filter body (15) is spaced apart 14 days, and back flushing adopts gas/water integrated processes, and gas/water is back flushing time length 3min simultaneously; Backwashing water intensity is 8L/ (s ﹒ m
2), gas intensity is 14L/ (s ﹒ m
2).
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| CN104556452A (en) * | 2015-01-07 | 2015-04-29 | 练亦成 | Integrated RO water purification machine |
| CN106554131A (en) * | 2015-09-25 | 2017-04-05 | 上海凡清环境工程有限公司 | Integrated preposition denitrification sewage-treatment plant |
| CN106977749A (en) * | 2017-04-14 | 2017-07-25 | 成都衔石科技有限公司 | A kind of lignin filters sedimenting system |
| CN109912035A (en) * | 2019-04-22 | 2019-06-21 | 惠州市合新科技有限公司 | And the method for oxygen-Characteristics of Anaerobic-aerobic Biological Filter integrated system and its processing sewage |
| CN111929217B (en) * | 2020-07-27 | 2021-07-30 | 南京大学 | Method for measuring effective specific surface area of porous organic filler |
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