CN107601665A - A kind of removal device and method of sewage plant tail water total nitrogen - Google Patents
A kind of removal device and method of sewage plant tail water total nitrogen Download PDFInfo
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- CN107601665A CN107601665A CN201711053883.2A CN201711053883A CN107601665A CN 107601665 A CN107601665 A CN 107601665A CN 201711053883 A CN201711053883 A CN 201711053883A CN 107601665 A CN107601665 A CN 107601665A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 287
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 266
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 133
- 239000010865 sewage Substances 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 50
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 94
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 92
- 239000010802 sludge Substances 0.000 claims abstract description 42
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- 239000007789 gas Substances 0.000 claims description 8
- 244000068988 Glycine max Species 0.000 claims description 6
- 235000010469 Glycine max Nutrition 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 235000007164 Oryza sativa Nutrition 0.000 claims description 5
- 238000005469 granulation Methods 0.000 claims description 5
- 230000003179 granulation Effects 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 235000009566 rice Nutrition 0.000 claims description 5
- 239000010902 straw Substances 0.000 claims description 5
- 239000006228 supernatant Substances 0.000 claims description 5
- 239000002351 wastewater Substances 0.000 claims description 4
- 230000001546 nitrifying effect Effects 0.000 claims description 3
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 2
- 230000001276 controlling effect Effects 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
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- 240000007594 Oryza sativa Species 0.000 claims 1
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- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000013270 controlled release Methods 0.000 abstract description 2
- 238000011010 flushing procedure Methods 0.000 description 12
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
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- 238000009825 accumulation Methods 0.000 description 5
- 241000209094 Oryza Species 0.000 description 4
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- 238000001816 cooling Methods 0.000 description 3
- 239000008367 deionised water Substances 0.000 description 3
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- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 description 1
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 1
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- Biological Treatment Of Waste Water (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
A kind of removal device and method of sewage plant tail water total nitrogen, device include reactor body, and reactor body sets screen cloth below recoil discharge outlet, and side wall sets safety dumping mouth successively from top to bottom, and recoil discharge outlet, water inlet and sample tap；Bottom sets out the mouth of a river；Reactor body top connects inlet water tank, and bottom is connected with backwash water tank, and delivery port is connected by conduit with backwash water tank.Minimizing technology is as follows：Agricultural waste material pre-processes as solid phase slow release carbon source；Denitrifying activated sludge enrichment culture；Solid carbon source biofilm starts with device, and total nitrogen goes division operation, collects denitrogenation and completes to obtain clear water, and device backwash.The invention device is simple, and method has biological modulated controlled release carbon performance using agricultural wastes as solid carbon source, dynamically meets that denitrification denitrogenation simultaneously realizes twice laid to carbon source demand, environmental protection；Water outlet total nitrogen concentration is stable in 1.5mg/L, and water outlet COD meets discharge standard, and removal device backwashing period is grown, and power cost is relatively low.
Description
Technical field：
The invention belongs to environmental protection technical field, and in particular to a kind of removal device of sewage plant tail water total nitrogen and side
Method.
Background technology：
At present, the processing of sewage treatment plant's two stage biological is unstable to total nitrogen removal effect, and water outlet total nitrogen index is difficult to meet
The requirement of one-level emission standard A (GB18918-2002).After sewage plant two stage treatment the COD of water outlet have been lowered to 50mg/L with
Under, carbon-nitrogen ratio be less than 5, anti-nitration reaction carbon source wretched insufficiency, cause denitrification effect undesirable, it is necessary to by additional carbon with
Ensure the progress of biological denitrificaion.
Liquid application carbon source, its dosage such as existing denitrification filter pool technique generally use methanol, acetic acid are difficult to control, mistake
Amount can cause water outlet COD increase, cause the secondary pollution of outlet water organic substance；Deficiency can cause nitrite nitrogen to accumulate again, influence water
Environmental security.Existing solid slow-release carbon source generally can be divided into three major types again：Natural material based on cellulose, can biology
The high polymer material of degraded and the new material based on mixture.Wherein using high molecular slow-release carbon source material packed bed,
Fluidized-bed process, up flow type water outlet SS is higher, and bed blocking easily occurs for downflow system, while carbon sequestration material chemical composition is single,
The growth demand of microorganism could be met by generally requiring to add trace element, and release carbon constant rate, can not be adapted to actual useless
The pollutional load fluctuation of water, carbon source material is expensive, and operating cost is high.
China is large agricultural country, and one of most abundant country of agricultural resource.Related data shows, annual at present to produce
Agricultural wastes reach 7.0 hundred million tons, account for 30% or so of whole world total amount.The key component of agricultural wastes is degradable
Crude fibre, the agricultural wastes direct returning to farmland 31.8% in China, stack retting returning to the field 9.1%, cross abdomen returning to the field 21.4%, ashing returning to the field
24.1%, remaining 13.5% abandons in field progress open incineration as discarded object heap, seriously pollutes atmospheric environment, special
It is not to cause serious haze to pollute in the winter time.It is badly in need of appropriate processing disposal and comprehensive utilization technique for agricultural wastes.
The content of the invention：
The purpose of the present invention is for overcome the deficiencies in the prior art, and total nitrogen is removed for sewage plant low ratio of carbon to ammonium tail water
It is required that to be widely present, cheap and release the agricultural wastes of carbon ability as solid carbon source with biological regulation, structure one
The denitrification denitrogenation of the removal device and method, both reinforced low-carbon nitrogen ratio sewage of kind sewage plant tail water total nitrogen, reduce organic matter and throw
Add improper caused secondary pollution risk, reduce operating cost again, realize the recycling of agricultural wastes.
To achieve the above object, the present invention uses following technical scheme：
A kind of removal device of sewage plant tail water total nitrogen, including reactor body, wherein：
Described reactor body upper portion side wall is sequentially provided with safety dumping mouth from top to bottom, and recoil discharge outlet, water inlet
And sample tap；Described reactor body bottom is provided with delivery port, and described reactor body is provided with below recoil discharge outlet
Screen cloth, prevent the spilling of solid carbon source particle in backwash process；
Wherein：
Described reactor body top is connected with inlet water tank, and described inlet water tank passes through water inlet phase with reactor body
Connection；
Described reactor body bottom is connected with backwash water tank, and described backwash water tank is connected with outlet pipe, institute
The delivery port stated by conduit with backwash water tank be connected, described outlet pipe simultaneously with reactor body bottom delivery port phase
Connection.
Described outlet pipe is provided with the 3rd magnetic valve, and described outlet pipe is connected with anti-siphon guide.
Described inlet water tank is connected with measuring pump, and described backwash water tank is provided with recoil water pump.
The conduit of described connection delivery port and backwash water tank is provided with the first magnetic valve.
Described reactor body bottom is connected with air compressor machine, and described air compressor machine is provided with second solenoid valve.
Described measuring pump, air compressor machine, recoiled water pump, the first magnetic valve, and second solenoid valve is all connected with the 3rd magnetic valve
There is time switch.
Using the removal device of described sewage plant tail water total nitrogen, the method that sewage plant tail water total nitrogen removes is carried out, including
Following steps：
(1) it is standby as solid phase slow release carbon source after taking agricultural waste material to be pre-processed；
(2) enrichment culture is carried out to denitrifying activated sludge；
Negate nitrifying activated sludge to be cultivated using batch process, cultivate to denitrification percent and reach more than 70%, culture is completed；
(3) biofilm is with starting：
(3-1) opens the removal device of sewage plant tail water total nitrogen, loads graded gravel support successively into reactor body
Layer, filter material layer and slow release carbon source layer, inlet water tank water inlet is opened, and the sludge that culture is completed is added into reactor body, carried out
Solid carbon source biofilm, after 10~18d, biofilm is completed；
(3-2) moment monitors delivery port water outlet total nitrogen concentration, when water outlet total nitrogen concentration stabilization is in below 1.5mg/L, tail
Water total nitrogen removal device starts successfully, as needed, persistently carries out total nitrogen and goes division operation, complete denitrogenation processing, it is complete to collect denitrogenation
Into the clear water of acquisition；
(4) device backwashes：
With the continuous service of tail water total nitrogen removal device, outlet effect reduces, filtering layer is backwashed, and completes recoil
Wash, and in backwash process, being intercepted by screen cloth prevents slow release carbon source layer floats from flowing out.
In described step (1), agricultural waste material is one or more of mixed in corncob, soybean peel and rice straw etc.
Compound.
In described step (1), the pretreatment mode of agricultural waste material in the following ways in one kind：One, it is block
It is cut into 1~2cm3Square, stalk class is cut into 2~3cm of length strip, and shell class does not do profile processing, cleans drying and uses；Two,
Crushing granulation is carried out to it, particle use is made.
In described step (2), described denitrifying activated sludge be municipal wastewater treatment plant second pond returned sludge, concentration
For 1200~5000mg/L；
In described step (2), described denitrifying activated sludge enrichment culture process is：The two of municipal wastewater treatment plant is taken to sink
Pond returned sludge, after vexed exposure, skim 1/4 supernatant, and add the pending waste water of equivalent, with Posterior circle carry out it is vexed expose, it is quiet
Sink, pour out and intake Four processes；And the supernatant liquid measure poured out every time is incrementally increased, shorten each vexed exposure time, treat sludge
Color is changed into brown color, and denitrification percent reaches more than 70%, and culture is completed.
In described step (3-1), slow release carbon source layer, filter material layer and each layer height ratio of gravel supporting layer are (15~7):
(10~5):(3~1), slow release carbon source layer add height and are not less than 0.7m.
In described step (3-1), water inlet using lower to flowing into water, water inlet pass sequentially through slow release carbon source layer, filter material layer and
Gravel supporting layer.
In described step (3-2), the clear water that denitrogenation is completed to obtain enters backwash water tank by delivery port, anti-for carrying out
Rinse.
In described step (4), the progress of described backwash is using water outlet total nitrogen concentration as Con trolling index, when water outlet total nitrogen
When concentration is more than 1.5mg/L, backwashed.
In described step (4), described backwash is carried out by the way of gas punching and water punching are combined.
In described step (4), the backwashing water formed after backwash discharges backwashing water by the discharge outlet that recoils, and passes through
Backwashing water of the safety dumping mouth discharge more than safety level.
The method removed using described sewage plant tail water total nitrogen, the sewage plant tail water nitrogen removal rate that denitrogenation is completed are reached
More than 90%, in processing hydraulic load≤7.64m3/m2Under the conditions of d, water outlet total nitrogen concentration can be maintained at below 1.5mg/L.
Beneficial effects of the present invention：
(1) sewage plant tail water total nitrogen minimizing technology of the invention, using agricultural waste material as solid carbon source, there is biology
Carbon performance is released in regulation and control, dynamically meets that denitrification denitrogenation is stablized in 1.5mg/L, ensured simultaneously to carbon source demand, water outlet total nitrogen concentration
Water outlet COD meets one-level emission standard A；
(2) sewage plant tail water total nitrogen removal device of the invention, can be in 10~18d under the conditions of low temperature (8 DEG C~17 DEG C)
Biofilm success, water outlet total nitrogen concentration is stable in below 1.5mg/L, and nitrogen removal rate reaches more than 90%, and does not have nitrite
Accumulation phenomenon, realize advanced nitrogen handle；
(3) backwashing period of sewage plant tail water total nitrogen removal device of the invention is 4~5d, and the cycle is longer, is advantageous to
Save power cost；
(4) (15 DEG C~23 DEG C) are continuously run 3 months under sewage plant tail water total nitrogen removal device normal temperature of the invention ,≤
7.64m3/m2Under conditions of d, the water outlet total nitrogen concentration of sewage plant tail water total nitrogen removal device can be maintained at 1.5mg/L with
Under, long-time advanced nitrogen process demand can be met by once adding；
(5) sewage plant tail water total nitrogen removal device of the invention can prevent slow release carbon source layer from floating by setting screen cloth
Outflow, raw material is saved, reduce operating cost.
(6) sewage plant tail water total nitrogen minimizing technology of the invention, using agricultural wastes as solid carbon source, total denitrogenation amount is
1.91KgN/Kg agricultural wastes, only calculate and add solid carbon source expense, about 0.58~1.2 yuan/KgN, far below methanol
12.04 yuan 6.96 yuan/KgN, sodium acetate/KgN, economic benefit are obvious；
(7) using the method for the present invention, both reinforced low-carbon nitrogen ratio sewage denitrification denitrogenation effect, reduced organic matter and added not
When causing secondary pollution risk, operating cost is reduced again, realizes twice laid.
Brief description of the drawings：
Fig. 1 is the removal device structural representation of the sewage plant tail water total nitrogen of the present invention；
Wherein：1- safety dumping mouths；2- recoil discharge outlet；3- inlet water tanks；4- measuring pumps；5- water inlets；6- time switch；
7- air compressor machines；8- second solenoid valves；9- backwashes water tank；10- outlet pipes；The magnetic valves of 11- first；12- recoil water pumps；13- goes out
The mouth of a river；14- sample taps；15- screen clothes；16- reactor bodies；The anti-siphon guides of 17-；The magnetic valves of 18- the 3rd；A- slow release carbon sources
Layer；B- volcanic rock filter material layers；C- supporting layers；
Fig. 2 is that corncob releases carbon RATES figure in clear water and denitrifying activated sludge respectively.
Embodiment：
With reference to embodiment, the present invention is described in further detail.
In following examples：
Screen cloth uses Kong Kuanyue 3mm stainless steel cloth；Reactor body is cylinder, is highly 3m；
Described denitrifying activated sludge enrichment culture process is：Take the second pond returned sludge of municipal wastewater treatment plant, vexed exposure
Afterwards, 1/4 supernatant is skimmed, and adds the pending waste water of equivalent, with Posterior circle vexed expose, quiet sink, pour out and intake four
Individual process；And the supernatant liquid measure poured out every time is incrementally increased, shorten each vexed exposure time, treat that sludge color is changed into brown color,
Denitrification percent reaches more than 70%, and culture is completed.
Reactor influent COD is 40~60mg/L, and total nitrogen concentration is 10~20mg/L.
Embodiment 1
A kind of removal device of sewage plant tail water total nitrogen, its structural representation as shown in figure 1, including reactor body 16,
Wherein：
The described upper portion side wall of reactor body 16 is sequentially provided with safety dumping mouth 1 from top to bottom, and recoil discharge outlet 2, enters
The mouth of a river 5 and sample tap 14；The described top of reactor body 16 is connected with inlet water tank 3, described inlet water tank 3 and reactor body
16 are connected by water inlet 5, and described inlet water tank 3 is connected with measuring pump 4；
Described reactor body 16 sets screen cloth 15 below recoil discharge outlet 2, prevents solid carbon in backwash process
The spilling of source particle；
The described bottom of reactor body 16 is provided with delivery port 13；
The described bottom outlet pipe 10 of reactor body 16 is connected with anti-siphon guide 17, and described outlet pipe 10 is provided with
3rd magnetic valve 18；
The described bottom of reactor body 16 is connected with backwash water tank 9, and described delivery port 13 passes through conduit and recoil
Water tank 9 is connected, and the conduit of described connection delivery port 13 and backwash water tank 9 is provided with the first magnetic valve 11 and back-flushing
Pump 12, described outlet pipe are connected with reactor body bottom delivery port simultaneously；
The described bottom of reactor body 16 is connected with air compressor machine 7, and described air compressor machine 7 is provided with second solenoid valve 8；
Described measuring pump 4, air compressor machine 7, recoil water pump 12, the first magnetic valve 11, the magnetic valve of second solenoid valve 8 and the 3rd
18 are respectively connected with time switch 6.
Using the removal device of described sewage plant tail water total nitrogen, the method that sewage plant tail water total nitrogen removes is carried out, including
Following steps：
(1) corncob is taken to be cut into 1~2cm3Square, after being cleaned with deionized water, be placed in 65 DEG C of baking oven and dry
24h, its natural cooling is treated, it is standby as solid phase slow release carbon source；
(2) enrichment culture is carried out to denitrifying activated sludge；
The second pond returned sludge for the municipal wastewater treatment plant that concentration is 3000mg/L is taken to be cultivated using batch process, culture is extremely
Denitrification percent reaches more than 70%, and culture is completed；
(3) biofilm is with starting：
(1) removal device of sewage plant tail water total nitrogen is opened, loads graded gravel support successively into reactor body 16
Layer C0.2m, filter material layer B 0.5m and slow release carbon source layer A 0.7m, the sludge that culture is completed is added into reactor body 16
0.5L, open inlet water tank 3 and intake, control in low hydraulic load 3.82m3/m2D carry out solid carbon source biofilm, water inlet using it is lower to
Water is flowed into, water inlet passes sequentially through slow release carbon source layer A, filter material layer B and gravel supporting layer C, and the total nitrogen of periodic monitoring delivery port 13 is dense
Spend, after 14d, total nitrogen reaches below 1.5mg/L, and tail water total nitrogen removal device start-up is completed；
(2) water inlet hydraulic load is increased to 4.46m3/m2D, persistently carry out total nitrogen and go division operation, complete denitrogenation processing, warp
Test, water outlet total nitrogen concentration is stable in below 1.0mg/L, and nitrogen removal rate reaches 94%, and without the accumulation of nitrite, goes out
Water COD concentration is less than 50mg/L, collects the clear water that denitrogenation is completed to obtain, and the clear water that denitrogenation is completed to obtain is entered anti-by delivery port 13
Flush box 9, for being backwashed；
(4) device backwashes：
With the continuous service of tail water total nitrogen removal device, outlet effect reduces, when water outlet total nitrogen concentration is more than 1.5mg/L
When, filtering layer is backwashed, backwash mode is that gas punching and water punching are combined, and completes backwash, what is formed after backwash is anti-
Flushing water discharges backwashing water by the discharge outlet 2 that recoils, and the backwashing water of safety level is exceeded by the discharge of safety dumping mouth 1,
In backwash process, being intercepted by screen cloth 15 prevents slow release carbon source layer A floats from flowing out.
Embodiment 2
A kind of removal device of sewage plant tail water total nitrogen, its structural representation as shown in figure 1, including reactor body 16,
Wherein：
The described upper portion side wall of reactor body 16 is sequentially provided with safety dumping mouth 1 from top to bottom, and recoil discharge outlet 2, enters
The mouth of a river 5 and sample tap 14；The described top of reactor body 16 is connected with inlet water tank 3, described inlet water tank 3 and reactor body
16 are connected by water inlet 5, and described inlet water tank 3 is connected with measuring pump 4；
Described reactor body 16 sets screen cloth 15 below recoil discharge outlet 2, prevents solid carbon in backwash process
The spilling of source particle；
The described bottom of reactor body 16 is provided with delivery port 13；
The described bottom outlet pipe 10 of reactor body 16 is connected with anti-siphon guide 17, and described outlet pipe 10 is provided with
3rd magnetic valve 18；
The described bottom of reactor body 16 is connected with backwash water tank 9, and described delivery port 13 passes through conduit and recoil
Water tank 9 is connected, and the conduit of described connection delivery port 13 and backwash water tank 9 is provided with the first magnetic valve 11 and back-flushing
Pump 12, described outlet pipe are connected with reactor body bottom delivery port simultaneously；
The described bottom of reactor body 16 is connected with air compressor machine 7, and described air compressor machine 7 is provided with second solenoid valve 8；
Described measuring pump 4, air compressor machine 7, recoil water pump 12, the first magnetic valve 11, the magnetic valve of second solenoid valve 8 and the 3rd
18 are respectively connected with time switch 6.
Using the removal device of described sewage plant tail water total nitrogen, the method that sewage plant tail water total nitrogen removes is carried out, including
Following steps：
(1) after taking soybean peel to be cleaned with deionized water, it is placed in 65 DEG C of baking oven and dries 24h, treats its natural cooling conduct
Solid phase slow release carbon source is standby；
(2) enrichment culture is carried out to denitrifying activated sludge；
The second pond returned sludge for the municipal wastewater treatment plant that concentration is 1200mg/L is taken to be cultivated using batch process, culture is extremely
Denitrification percent reaches more than 70%, and culture is completed；
(3) biofilm is with starting：
(1) removal device of sewage plant tail water total nitrogen is opened, loads graded gravel support successively into reactor body 16
Layer C0.1m, filter material layer B 0.5m and slow release carbon source layer A 0.7m, the sludge 2L that culture is completed is added into reactor body 16,
Open inlet water tank 3 to intake, control in low hydraulic load 3.82m3/m2D carries out solid carbon source biofilm, and water inlet is using lower to flowing into
Water, intake and pass sequentially through slow release carbon source layer A, filter material layer B and gravel supporting layer C, the total nitrogen concentration of periodic monitoring delivery port 13,
After 12d, total nitrogen reaches below 1.5mg/L, and tail water total nitrogen removal device start-up is completed；
(2) water inlet hydraulic load is increased to 5.10m3/m2D, persistently carry out total nitrogen and go division operation, complete denitrogenation processing, warp
Test, water outlet total nitrogen concentration is stable in below 0.5mg/L, and nitrogen removal rate reaches 96%, and without the accumulation of nitrite, goes out
Water COD concentration is less than 45mg/L, collects the clear water that denitrogenation is completed to obtain, and the clear water that denitrogenation is completed to obtain is entered anti-by delivery port 13
Flush box 9, for being backwashed；
(4) device backwashes：
With the continuous service of tail water total nitrogen removal device, outlet effect reduces, when water outlet total nitrogen concentration is more than 1.5mg/L
When, filtering layer is backwashed, backwash mode is that gas punching and water punching are combined, and completes backwash, what is formed after backwash is anti-
Flushing water discharges backwashing water by the discharge outlet 2 that recoils, and the backwashing water of safety level is exceeded by the discharge of safety dumping mouth 1,
In backwash process, being intercepted by screen cloth 15 prevents slow release carbon source layer A floats from flowing out.
Embodiment 3
A kind of removal device of sewage plant tail water total nitrogen, its structural representation as shown in figure 1, including reactor body 16,
Wherein：
The described upper portion side wall of reactor body 16 is sequentially provided with safety dumping mouth 1 from top to bottom, and recoil discharge outlet 2, enters
The mouth of a river 5 and sample tap 14；The described top of reactor body 16 is connected with inlet water tank 3, described inlet water tank 3 and reactor body
16 are connected by water inlet 5, and described inlet water tank 3 is connected with measuring pump 4；
Described reactor body 16 sets screen cloth 15 below recoil discharge outlet 2, prevents solid carbon in backwash process
The spilling of source particle；
The described bottom of reactor body 16 is provided with delivery port 13；
The described bottom outlet pipe 10 of reactor body 16 is connected with anti-siphon guide 17, and described outlet pipe 10 is provided with
3rd magnetic valve 18；
The described bottom of reactor body 16 is connected with backwash water tank 9, and described delivery port 13 passes through conduit and recoil
Water tank 9 is connected, and the conduit of described connection delivery port 13 and backwash water tank 9 is provided with the first magnetic valve 11 and back-flushing
Pump 12, described outlet pipe are connected with reactor body bottom delivery port simultaneously；
The described bottom of reactor body 16 is connected with air compressor machine 7, and described air compressor machine 7 is provided with second solenoid valve 8；
Described measuring pump 4, air compressor machine 7, recoil water pump 12, the first magnetic valve 11, the magnetic valve of second solenoid valve 8 and the 3rd
18 are respectively connected with time switch 6.
Using the removal device of described sewage plant tail water total nitrogen, the method that sewage plant tail water total nitrogen removes is carried out, including
Following steps：
(1) take rice straw to be cut into 2~3cm of length strip, after being cleaned with deionized water, be placed in 65 DEG C of baking oven and dry
24h, its natural cooling is treated, it is standby as solid phase slow release carbon source；
(2) enrichment culture is carried out to denitrifying activated sludge；
The second pond returned sludge for the municipal wastewater treatment plant that concentration is 3000mg/L is taken to be cultivated using batch process, culture is extremely
Denitrification percent reaches more than 70%, and culture is completed；
(3) biofilm is with starting：
(1) removal device of sewage plant tail water total nitrogen is opened, loads graded gravel support successively into reactor body 16
Layer C0.3m, filter material layer B 0.5m and slow release carbon source layer A 0.7m, the sludge that culture is completed is added into reactor body 16
0.5L, open inlet water tank 3 and intake, control in low hydraulic load 3.82m3/m2D carry out solid carbon source biofilm, water inlet using it is lower to
Water is flowed into, water inlet passes sequentially through slow release carbon source layer A, filter material layer B and gravel supporting layer C, and the total nitrogen of periodic monitoring delivery port 13 is dense
Spend, after 13d, total nitrogen reaches below 1.5mg/L, and tail water total nitrogen removal device start-up is completed；
(2) it is stepped up into water hydraulic load to 7.64m3/m2D, persistently carry out total nitrogen and go division operation, complete at denitrogenation
Reason, after tested, water outlet total nitrogen concentration is stable, and in below 1.5mg/L, nitrogen removal rate reaches 90%, and without the product of nitrite
Tired, effluent COD concentration is less than 35mg/L, collects the clear water that denitrogenation is completed to obtain, the clear water that denitrogenation is completed to obtain is by delivery port 13
Into backwash water tank 9, for being backwashed；
(4) device backwashes：
With the continuous service of tail water total nitrogen removal device, outlet effect reduces, when water outlet total nitrogen concentration is more than 1.5mg/L
When, filtering layer is backwashed, backwash mode is that gas punching and water punching are combined, and completes backwash, what is formed after backwash is anti-
Flushing water discharges backwashing water by the discharge outlet 2 that recoils, and the backwashing water of safety level is exceeded by the discharge of safety dumping mouth 1,
In backwash process, being intercepted by screen cloth 15 prevents slow release carbon source layer A floats from flowing out.
Embodiment 4
A kind of removal device of sewage plant tail water total nitrogen, its structural representation as shown in figure 1, including reactor body 16,
Wherein：
The described upper portion side wall of reactor body 16 is sequentially provided with safety dumping mouth 1 from top to bottom, and recoil discharge outlet 2, enters
The mouth of a river 5 and sample tap 14；The described top of reactor body 16 is connected with inlet water tank 3, described inlet water tank 3 and reactor body
16 are connected by water inlet 5, and described inlet water tank 3 is connected with measuring pump 4；
Described reactor body 16 sets screen cloth 15 below recoil discharge outlet 2, prevents solid carbon in backwash process
The spilling of source particle；
The described bottom of reactor body 16 is provided with delivery port 13；
The described bottom outlet pipe 10 of reactor body 16 is connected with anti-siphon guide 17, and described outlet pipe 10 is provided with
3rd magnetic valve 18；
The described bottom of reactor body 16 is connected with backwash water tank 9, and described delivery port 13 passes through conduit and recoil
Water tank 9 is connected, and the conduit of described connection delivery port 13 and backwash water tank 9 is provided with the first magnetic valve 11 and back-flushing
Pump 12, described outlet pipe are connected with reactor body bottom delivery port simultaneously；
The described bottom of reactor body 16 is connected with air compressor machine 7, and described air compressor machine 7 is provided with second solenoid valve 8；
Described measuring pump 4, air compressor machine 7, recoil water pump 12, the first magnetic valve 11, the magnetic valve of second solenoid valve 8 and the 3rd
18 are respectively connected with time switch 6.
Using the removal device of described sewage plant tail water total nitrogen, the method that sewage plant tail water total nitrogen removes is carried out, including
Following steps：
(1) corncob, soybean peel and rice straw mixture are taken, crushing granulation is carried out to three, particle is made, as solid phase
Slow release carbon source is standby；
(2) enrichment culture is carried out to denitrifying activated sludge；
The second pond returned sludge for the municipal wastewater treatment plant that concentration is 5000mg/L is taken to be cultivated using batch process, culture is extremely
Denitrification percent reaches more than 70%, and culture is completed；
(3) biofilm is with starting：
(1) removal device of sewage plant tail water total nitrogen is opened, loads graded gravel support successively into reactor body 16
Layer C0.15m, filter material layer B 0.5m and slow release carbon source layer A 0.75m, the sludge that culture is completed is added into reactor body 16
0.5L, open inlet water tank 3 and intake, control in low hydraulic load 3.82m3/m2D carry out solid carbon source biofilm, water inlet using it is lower to
Water is flowed into, water inlet passes sequentially through slow release carbon source layer A, filter material layer B and gravel supporting layer C, and the total nitrogen of periodic monitoring delivery port 13 is dense
Spend, after 13d, total nitrogen reaches below 1.5mg/L, and tail water total nitrogen removal device start-up is completed；
(2) water inlet hydraulic load is increased to 4.46m3/m2D, persistently carry out total nitrogen and go division operation, complete denitrogenation processing, warp
Test, water outlet total nitrogen concentration is stable in below 1.2mg/L, and nitrogen removal rate reaches 92%, and without the accumulation of nitrite, goes out
Water COD concentration is less than 50mg/L, collects the clear water that denitrogenation is completed to obtain, and the clear water that denitrogenation is completed to obtain is entered anti-by delivery port 13
Flush box 9, for being backwashed；
(4) device backwashes：
With the continuous service of tail water total nitrogen removal device, outlet effect reduces, when water outlet total nitrogen concentration is more than 1.5mg/L
When, filtering layer is backwashed, backwash mode is that gas punching and water punching are combined, and completes backwash, what is formed after backwash is anti-
Flushing water discharges backwashing water by the discharge outlet 2 that recoils, and the backwashing water of safety level is exceeded by the discharge of safety dumping mouth 1,
In backwash process, being intercepted by screen cloth 15 prevents slow release carbon source layer A floats from flowing out.
Embodiment 5
A kind of removal device of sewage plant tail water total nitrogen, its structural representation as shown in figure 1, including reactor body 16,
Wherein：
The described upper portion side wall of reactor body 16 is sequentially provided with safety dumping mouth 1 from top to bottom, and recoil discharge outlet 2, enters
The mouth of a river 5 and sample tap 14；The described top of reactor body 16 is connected with inlet water tank 3, described inlet water tank 3 and reactor body
16 are connected by water inlet 5, and described inlet water tank 3 is connected with measuring pump 4；
Described reactor body 16 sets screen cloth 15 below recoil discharge outlet 2, prevents solid carbon in backwash process
The spilling of source particle；
The described bottom of reactor body 16 is provided with delivery port 13；
The described bottom outlet pipe 10 of reactor body 16 is connected with anti-siphon guide 17, and described outlet pipe 10 is provided with
3rd magnetic valve 18；
The described bottom of reactor body 16 is connected with backwash water tank 9, and described delivery port 13 passes through conduit and recoil
Water tank 9 is connected, and the conduit of described connection delivery port 13 and backwash water tank 9 is provided with the first magnetic valve 11 and back-flushing
Pump 12, described outlet pipe are connected with reactor body bottom delivery port simultaneously；
The described bottom of reactor body 16 is connected with air compressor machine 7, and described air compressor machine 7 is provided with second solenoid valve 8；
Described measuring pump 4, air compressor machine 7, recoil water pump 12, the first magnetic valve 11, the magnetic valve of second solenoid valve 8 and the 3rd
18 are respectively connected with time switch 6.
Using the removal device of described sewage plant tail water total nitrogen, the method that sewage plant tail water total nitrogen removes is carried out, including
Following steps：
(1) corncob and the mixture of soybean are taken, carries out crushing granulation, it is standby as solid phase slow release carbon source that particle is made；
(2) enrichment culture is carried out to denitrifying activated sludge；
The second pond returned sludge for the municipal wastewater treatment plant that concentration is 4000mg/L is taken to be cultivated using batch process, culture is extremely
Denitrification percent reaches more than 70%, and culture is completed；
(3) biofilm is with starting：
(1) removal device of sewage plant tail water total nitrogen is opened, loads graded gravel support successively into reactor body 16
Layer C0.1m, filter material layer B 1.0m and slow release carbon source layer A 1.5m, open inlet water tank 3 and intake, training is added into reactor body 16
The sludge 0.5L completed is supported, inlet water tank 3 is opened and intakes, control in low hydraulic load 3.82m3/m2D carries out solid carbon source biofilm,
Using lower to water is flowed into, water inlet passes sequentially through slow release carbon source layer A, filter material layer B and gravel supporting layer C, periodic monitoring water outlet for water inlet
Mouthfuls 13 total nitrogen concentration, after 18d, total nitrogen reaches below 1.5mg/L, and tail water total nitrogen removal device start-up is completed；
(2) it is stepped up into water hydraulic load to 5.10m3/m2D, persistently carry out total nitrogen and go division operation, complete at denitrogenation
Reason, after tested, water outlet total nitrogen concentration is stable, and in below 1.0mg/L, nitrogen removal rate reaches 95%, and without the product of nitrite
Tired, effluent COD concentration is less than 45mg/L, collects the clear water that denitrogenation is completed to obtain, the clear water that denitrogenation is completed to obtain is by delivery port 13
Into backwash water tank 9, for being backwashed；
(4) device backwashes：
With the continuous service of tail water total nitrogen removal device, outlet effect reduces, when water outlet total nitrogen concentration is more than 1.5mg/L
When, filtering layer is backwashed, backwash mode is that gas punching and water punching are combined, and completes backwash, what is formed after backwash is anti-
Flushing water discharges backwashing water by the discharge outlet 2 that recoils, and the backwashing water of safety level is exceeded by the discharge of safety dumping mouth 1,
In backwash process, being intercepted by screen cloth 15 prevents slow release carbon source layer A floats from flowing out.
Embodiment 6
A kind of removal device of sewage plant tail water total nitrogen, its structural representation as shown in figure 1, including reactor body 16,
Wherein：
The described upper portion side wall of reactor body 16 is sequentially provided with safety dumping mouth 1 from top to bottom, and recoil discharge outlet 2, enters
The mouth of a river 5 and sample tap 14；The described top of reactor body 16 is connected with inlet water tank 3, described inlet water tank 3 and reactor body
16 are connected by water inlet 5, and described inlet water tank 3 is connected with measuring pump 4；
Described reactor body 16 sets screen cloth 15 below recoil discharge outlet 2, prevents solid carbon in backwash process
The spilling of source particle；
The described bottom of reactor body 16 is provided with delivery port 13；
The described bottom outlet pipe 10 of reactor body 16 is connected with anti-siphon guide 17, and described outlet pipe 10 is provided with
3rd magnetic valve 18；
The described bottom of reactor body 16 is connected with backwash water tank 9, and described delivery port 13 passes through conduit and recoil
Water tank 9 is connected, and the conduit of described connection delivery port 13 and backwash water tank 9 is provided with the first magnetic valve 11 and back-flushing
Pump 12, described outlet pipe are connected with reactor body bottom delivery port simultaneously；
The described bottom of reactor body 16 is connected with air compressor machine 7, and described air compressor machine 7 is provided with second solenoid valve 8；
Described measuring pump 4, air compressor machine 7, recoil water pump 12, the first magnetic valve 11, the magnetic valve of second solenoid valve 8 and the 3rd
18 are respectively connected with time switch 6.
Using the removal device of described sewage plant tail water total nitrogen, the method that sewage plant tail water total nitrogen removes is carried out, including
Following steps：
(1) mixture of soybean peel and rice straw is taken, crushing granulation is carried out to it, particle is made as solid phase slow release carbon source
It is standby；
(2) enrichment culture is carried out to denitrifying activated sludge；
The second pond returned sludge for the municipal wastewater treatment plant that concentration is 2000mg/L is taken to be cultivated using batch process, culture is extremely
Denitrification percent reaches more than 70%, and culture is completed；
(3) biofilm is with starting：
(1) removal device of sewage plant tail water total nitrogen is opened, loads graded gravel support successively into reactor body 16
Layer C0.2m, filter material layer B 0.7m and slow release carbon source layer A 0.9m, open inlet water tank 3 and intake, training is added into reactor body 16
The sludge 1L completed is supported, inlet water tank 3 is opened and intakes, control in low hydraulic load 3.82m3/m2D carries out solid carbon source biofilm, enters
For water using lower to water is flowed into, water inlet passes sequentially through slow release carbon source layer A, filter material layer B and gravel supporting layer C, periodic monitoring delivery port
13 total nitrogen concentration, after 18d, total nitrogen reaches below 1.5mg/L, and tail water total nitrogen removal device start-up is completed；
(2) it is stepped up into water hydraulic load to 7.64m3/m2D, persistently carry out total nitrogen and go division operation, complete at denitrogenation
Reason, after tested, water outlet total nitrogen concentration is stable in below 1.0mg/L, and nitrogen removal rate reaches 92%, and without nitrite
Accumulation, effluent COD concentration are less than 35mg/L, collect the clear water that denitrogenation is completed to obtain, the clear water that denitrogenation is completed to obtain is by delivery port
13 enter backwash water tank 9, for being backwashed；
(4) device backwashes：
With the continuous service of tail water total nitrogen removal device, outlet effect reduces, when water outlet total nitrogen concentration is more than 1.5mg/L
When, filtering layer is backwashed, backwash mode is that gas punching and water punching are combined, and completes backwash, what is formed after backwash is anti-
Flushing water discharges backwashing water by the discharge outlet 2 that recoils, and the backwashing water of safety level is exceeded by the discharge of safety dumping mouth 1,
In backwash process, being intercepted by screen cloth 15 prevents slow release carbon source layer A floats from flowing out.
Embodiment 7
The removal device structural representation for the sewage plant tail water total nitrogen that the present embodiment uses is as shown in figure 1, concrete structure is same
Embodiment 1~6, the present embodiment specific operation process is as follows, in 4 groups of removal devices, adds graded gravel supporting layer 0.3m, fire
It is highly respectively 0.4m, 0.7m and 0.9m that corncob is loaded in rock filter material layer 0.5m, 1#, 2# and 3# removal device of mountain, and inoculation is anti-
Nitrifying activated sludge, intake as artificial wastewater；It is highly 0.7m that corncob is loaded in the 4th group of removal device, not inoculating active
Sludge, intake as clear water.In hydraulic load change procedure, that observes corncob releases the change of carbon speed, corncob in clear water and
Carbon speed change comparison diagram is released in denitrifying activated sludge, as shown in Figure 2；
In the startup stage I of removal device, the carbon speed of actually releasing of corncob is only about 1.16~2.84mg/ (gL
D), it is then 9.44mg/ (gLd) that corresponding clear water, which releases carbon speed, actual by 10~18d start-up, corncob
Release carbon speed and be down to about 0.39~0.46mg/ (gLd), and corresponding clear water releases carbon speed and then falls to 0.36mg/ (gL
d)；
During the Load lifting in stage I, II, III, corncob actually release carbon speed with the raising of hydraulic load and
Increase, when hydraulic load is by 3.82m3/m24.46m is arrived in d liftings3/m2During d, corncob actually release carbon speed by 0.29~
0.41mg/ (gLd) increases to 0.49~0.65mg/ (gLd), amplification about 62.86%；When hydraulic load continues to lift up
To 5.10m3/m2D, the carbon speed of actually releasing of corncob increase to 0.39~0.54mg/ by 0.32~0.54mg/ (gLd)
(gLd), amplification is up to 8.16%；
The hydraulic load 7.64m of stage IV3/m2Under the conditions of d, the carbon speed of releasing of solid carbon source is more or less the same in each filter tank, by
This apparently, corncob has biological modulated controlled release carbon characteristic in denilrification system.On the other hand, the clear water to be compared with corncob
Release carbon speed 0.01mg/ (gLd), corncob it is physical release carbon amounts and only account for always release 2.33% of carbon amounts or so, illustrate jade
Meter Xin's releases the degradation that carbon is mainly microorganism.In the present invention, degraded of the cellulose-degrading bacteria to agricultural waste material is released
The denitrogenation of carbon and denitrifying bacteria needs carbon to form dynamic equilibrium, has ensured the stability of operation.
The foregoing is only a preferred embodiment of the present invention, but embodiments of the present invention not by above-mentioned reality
Example limitation, protection domain are also not limited thereto, and any one skilled in the art is not originally departing from the present invention's
In the case of core, simple deformation that technique according to the invention scheme and its inventive concept are made, modification, simplification etc. are equivalent
Substitute mode, should all be included within the scope of the present invention.
Claims (10)
- A kind of 1. removal device of sewage plant tail water total nitrogen, it is characterised in that including reactor body, wherein：Described reactor body upper portion side wall is sequentially provided with safety dumping mouth from top to bottom, and recoil discharge outlet, water inlet and takes Sample mouth；Described reactor body bottom is provided with delivery port, and described reactor body is provided with screen cloth below recoil discharge outlet；Wherein：Described reactor body top is connected with inlet water tank, and described inlet water tank is connected with reactor body by water inlet Connect；Described reactor body bottom is connected with backwash water tank, and described backwash water tank is connected with outlet pipe, described Delivery port is connected by conduit with backwash water tank, and described outlet pipe is connected with reactor body bottom delivery port simultaneously Connect.
- 2. the removal device of sewage plant tail water total nitrogen according to claim 1, it is characterised in that set on described outlet pipe There is the 3rd magnetic valve, described outlet pipe is connected with anti-siphon guide, and described inlet water tank is connected with measuring pump, described recoil Water tank is provided with recoil water pump, and the conduit of described connection delivery port and backwash water tank is provided with the first magnetic valve.
- 3. the removal device of sewage plant tail water total nitrogen according to claim 1, it is characterised in that described reactor body Bottom is connected with air compressor machine, and described air compressor machine is provided with second solenoid valve.
- 4. the removal device of the sewage plant tail water total nitrogen according to claim 1 or 2 or 3, it is characterised in that described metering Pump, air compressor machine, recoil water pump, the first magnetic valve, and second solenoid valve is respectively connected with time switch with the 3rd magnetic valve.
- 5. using the removal device of the sewage plant tail water total nitrogen described in claim 1, the side that sewage plant tail water total nitrogen removes is carried out Method, it is characterised in that comprise the following steps：(1) it is standby as solid phase slow release carbon source after taking agricultural waste material to be pre-processed；(2) enrichment culture is carried out to denitrifying activated sludge；Negate nitrifying activated sludge to be cultivated using batch process, cultivate to denitrification percent and reach more than 70%, culture is completed；(3) biofilm is with starting：(3-1) opens the removal device of sewage plant tail water total nitrogen, loads graded gravel supporting layer, filter successively into reactor body The bed of material and slow release carbon source layer, inlet water tank water inlet is opened, and the sludge that culture is completed is added into reactor body, carry out solid carbon Source biofilm, after 10~18d, biofilm is completed；(3-2) moment monitors delivery port water outlet total nitrogen concentration, and when water outlet total nitrogen concentration stabilization is in below 1.5mg/L, tail water is total Nitrogen removal device starts successfully, as needed, persistently carries out total nitrogen and goes division operation, complete denitrogenation processing, collects denitrogenation and complete to obtain The clear water obtained；(4) device backwashes：With the continuous service of tail water total nitrogen removal device, outlet effect reduces, filtering layer is backwashed, and completes backwash, And in backwash process, being intercepted by screen cloth prevents slow release carbon source layer floats from flowing out.
- 6. the method that sewage plant tail water total nitrogen according to claim 5 removes, it is characterised in that in described step (1), Agricultural waste material is one or more of mixtures in corncob, soybean peel and rice straw etc., described agricultural waste material Pretreatment mode in the following ways in one kind：One, bulk is cut into 1~2cm3Square, stalk class is cut into 2~3cm's of length Strip, shell class do not do profile processing, clean drying and use；Two, crushing granulation is carried out to it, particle use is made.
- 7. the method that sewage plant tail water total nitrogen according to claim 5 removes, it is characterised in that in described step (2), Described denitrifying activated sludge is the second pond returned sludge of municipal wastewater treatment plant, and concentration is 1200~5000mg/L；Described Denitrifying activated sludge enrichment culture process is：The second pond returned sludge of municipal wastewater treatment plant is taken, after vexed exposure, is skimmed on 1/4 Clear liquid, and the pending waste water of equivalent is added, vexed exposure, the quiet Four processes that sink, pour out and intake are carried out with Posterior circle；And progressively increase The big supernatant liquid measure poured out every time, shortens each vexed exposure time, treats that sludge color is changed into brown color, denitrification percent reach 70% with On, culture is completed.
- 8. the method that sewage plant tail water total nitrogen according to claim 5 removes, it is characterised in that described step (3-1) In, slow release carbon source layer, filter material layer and each layer height ratio of gravel supporting layer are (15~7):(10~5):(3~1), slow release carbon source Layer adds height and is not less than 0.7m.
- 9. the method that sewage plant tail water total nitrogen according to claim 5 removes, it is characterised in that in described step (4), The progress of described backwash is using water outlet total nitrogen concentration as Con trolling index, when water outlet total nitrogen concentration is more than 1.5mg/L, carries out anti- Rinse, described backwash is carried out by the way of gas punching and water punching are combined.
- 10. the method removed using the sewage plant tail water total nitrogen described in claim 6, it is characterised in that the sewage that denitrogenation is completed Plant tail water nitrogen removal rate reaches more than 90%, in processing hydraulic load≤7.64m3/m2Under the conditions of d, water outlet total nitrogen concentration energy Enough it is maintained at below 1.5mg/L.
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Application publication date: 20180119 |