CN105621608B - Printing and dyeing wastewater autotrophic denitrification device and method - Google Patents
Printing and dyeing wastewater autotrophic denitrification device and method Download PDFInfo
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- CN105621608B CN105621608B CN201610160455.9A CN201610160455A CN105621608B CN 105621608 B CN105621608 B CN 105621608B CN 201610160455 A CN201610160455 A CN 201610160455A CN 105621608 B CN105621608 B CN 105621608B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/30—Nature of the water, waste water, sewage or sludge to be treated from the textile industry
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Abstract
The invention provides a printing and dyeing wastewater autotrophic denitrification device and a method, belonging to the technical field of printing and dyeing wastewater treatment. By autotrophic denitrifying bacteria, reduced sulfur and iron are used as electron donors to remove NO in water3 ‑Reduction of-N to N2Realize denitrification. The invention has the advantages of high denitrification efficiency and small pH change of effluent water by combined filling of the pyrite and the sulfur and optimized proportioning. Meanwhile, the method has the advantages of high starting speed, no need of sludge inoculation, long backwashing period and the like. The invention can adopt the operation when the TN exceeds standard according to the condition of the secondary effluent TN of the printing and dyeing wastewater treatment plant, the operation is stopped when the TN reaches the standard, and the secondary effluent directly crosses the invention and enters the next treatment unit or is directly discharged, thereby having the advantages of flexible operation mode and low operation cost.
Description
Technical field
The present invention relates to techniques of Dyeing Wastewater Treatment field, particularly relates to a kind of dyeing waste water autotrophic denitrification nitrogen rejection facility
And method.
Background technology
Textile printing and dyeing is one of key industry of industrial pollution control and water saving.Textile printing and dyeing wastewater accounts for national industrial wastewater
It is row that the 8% of total emission volumn, wherein COD (COD), ammonia nitrogen discharge capacity, which account for the 9% of national industrial discharge total amount and 3%,
The heavy polluted industry of name the 4th.Printing and dyeing are textile product post-processing processes, be textile industry adapt to and meet consume, get the market in gear,
Increase the key of economic benefit, but it is also that textile industry pollutes most heavy process to print and dye, and wastewater discharge accounts for industry discharge of wastewater
The 60-80% of total amount is influence and restricts the key link of Development of Textile Industry.
With China's fast development economic in recent years, water environment pollution situation is increasingly serious, and country is to textile printing and dyeing row
Industry water prevention and cure of pollution propose requirements at the higher level.《Dyeing entry criteria (revised edition in 2010)》Regulation, by 2015, unit
Industrial added value wastewater discharge reduced by 30% than 2010, and discharge of major pollutant amount declined 10% than 2010.New revision
's《Textile dyeing and finishing industrial water pollution thing discharge standard》(GB4287-2012) all kinds of pollutant emission limits are not only increased, and
And more strict requirements are proposed to unit product displacement.Jiangsu Province took the lead in carrying out standard upgrading in the whole nation in 2005,
TAI HU AREA printing and dyeing enterprise COD discharge standards are national I levels standard by original national II levels standard upgrading, with performing Jiangsu Province
Square standard《Textile dyeing and finishing industrial water pollution thing discharge standard》(DB32/670-2004).In September, 2007, Jiangsu Province promulgates reality again
Shi Liao《TAI HU AREA urban wastewater treatment firm and the main Sewage Water Emissions limit value of priority industry industry》(DB32/T1072-
2007), it is specified that from 1 day January in 2008, urban wastewater treatment firm, textile dyeing and finishing industry of Taihu Lake basin etc. are further improved
Six big industry wastewater discharge standards, Dyeing ＆ Finishing Industry waste water COD and TN discharge standards are respectively increased as 50mg/L and 15mg/L.Newly
After standard promulgation is implemented, treatment of dyeing wastewater factory causes denitrifying carbon source insufficient, it is difficult to realize because water inlet organic loading reduces
TN qualified discharges.
Autotrophic denitrification has that sludge yield is few, is widely closed without the advantage such as additional carbon, operating cost is low
Note.Sulphur, iron combination autotrophic denitrification have that denitrification rate is fast, water outlet pH changes are small, operating mode is stable low with sludge yield
The advantages that, and ferric sufide and brenstone is cheap, is easily obtained, and more pacifies using and transport etc. compared with hydrogen autotrophic denitrification
It is complete and convenient, therefore there is wide market application foreground.
The content of the invention
The present invention for treatment of dyeing wastewater factory because heterotrophic denitrification carbon source deficiency cause water outlet TN exceeded the problem of, there is provided
A kind of dyeing waste water autotrophic denitrification nitrogen rejection facility and method.The device include water inlet pipe, water intaking valve, surmount pipe, surmount pipe valve,
Backwash water inlet pipe, backwash water intaking valve, backwash intake pump, blow-down pipe, atmospheric valve, outlet pipe, outlet valve, backwash water outlet
Valve, backwash outlet pipe and reactor body, wherein, backwash water inlet pipe is connected to reactor body bottom, blow-down pipe connection
In reactor body side lower, water inlet pipe connects with backwash water inlet pipe, leads to water inlet pipe and the water backwashed in water inlet pipe
Cross reactor body bottom and enter reactor body, outlet pipe and backwash outlet pipe are connected to reactor body top；Surmount
Pipe is connected on water inlet pipe, is surmounted to set on pipe and is surmounted pipe valve, and water intaking valve is arranged on water inlet pipe, and water intaking valve is positioned at surmounting pipe
Between water inlet pipe junction and reactor body and water inlet pipe junction；Installation of relief valve on blow-down pipe；Backwash water inlet pipe
It is upper that backwash water intaking valve is set, backwash and backwash intake pump is set between water intaking valve and reactor body；Set on outlet pipe
Outlet valve；Backwash and backwash outlet valve is set on outlet pipe；Filter plate and long handle are set gradually in reactor body from bottom to top
Filter, troilite packing layer and sulphur packing layer, filter plate and strainer head are used to support filler and realize water distribution uniformity..
For the device using treatment of dyeing wastewater factory secondary effluent as process object, reactor body external form is the life of a cylinder
Change reactor.The distance away from reactor body delivery port accounts for the 10% of reactor body height at the top of sulphur packing layer.Troilite
The volume ratio of packing layer and sulphur packing layer is 1:5.Troilite packing layer packing material size is 3~5mm, and sulfur content is more than 48%,
Iron content is more than 43%；Sulphur packing layer packing material size is 3~5mm, and sulfur content is more than 95%.
Use the device carry out denitrification denitrogenation method and principle for：
In the case where treatment of dyeing wastewater factory secondary effluent TN is up to standard, water intaking valve, backwash water intaking valve and emptying are closed
Valve, opens the pipe valve that surmounts surmounted on pipe, and current directly enter next place by surmounting pipe across autotrophic denitrification nitrogen rejection facility
Unit or directly outer row are managed, autotrophic denitrification device is in idle state, to reduce operating cost；
In the case where treatment of dyeing wastewater factory secondary effluent TN is exceeded, shutoff device surmount pipe valve, backwash water intaking valve,
Outlet valve and atmospheric valve are backwashed, water intaking valve is opened and water outlet pipe valve, secondary effluent enters reactor body by water inlet pipe, entered
Enter reactor body water inlet first pass through filter plate and strainer head uniform water distribution after enter troilite packing layer, be attached to troilite
The thiobacillus denitrificans on filler surface are using the reduced sulfur in troilite as electron donor, by the NO in sewage3 -- N is reduced into N2It is real
Existing denitrogenation, while reduced sulfur is oxidized to SO4 2-.Iron in troilite is with Fe2+Form dissolution, it is thin by iron autotrophic denitrification
Bacterium utilizes, by the NO in sewage3 -- N is reduced into N2Realize denitrogenation, while by Fe2+It is oxidized to Fe3+。Fe3+In the sewage of neutrality
It is hydrolyzed into Fe (OH)3, at Fe (OH)3Lower SS, colourity and the organic matter that can further remove in sewage of coagulating sedimentation effect.With
Troilite is as follows as the reaction equation of the autotrophic denitrification denitrogenation of electron donor：
6NO3 -+2FeS2+4H2O→3N2+4SO4 2-+2Fe(OH)3+2H+
The sewage for then passing through troilite packing layer enters sulphur packing layer, by the denitrogenation sulphur bar for being attached to filler surface
Bacterium further removes remaining NO in sewage using sulphur as electron donor3--N, ensure that TN is up to standard.Thiobacillus denitrificans are in removing NO3--
Sulphur is oxidized to SO while N4 2-, and utilize the energy assimilation CO of reaction release2, to synthesize own cells material, realize life
Long propagation, the reaction equation of the autotrophic denitrification denitrogenation using sulphur as electron donor are as follows：
NO3 -+1.047S+0.283CO2+0.740H2O→0.056C5H7O2N+0.472N2+1.047SO4 2-+1.094H+
Finally, sewage discharges or entered next processing list after processing realizes that TN is up to standard by the outlet pipe on device top
Member.
Continuously run, in the case of head loss increase in the device, closing surmounts pipe valve, atmospheric valve, water intaking valve, water outlet
Valve, backwash water intaking valve and backwash outlet valve are opened, and open backwash intake pump, the device is backwashed.Wherein,
Backwashing water is sewage plant secondary effluent, and backwashing time is 10~15min, and backwash water outlet is discharged into by backwashing outlet pipe
The total water inlet end of sewage plant.
The above-mentioned technical proposal of the present invention has the beneficial effect that：
First, accurately matched by ferric sufide and brenstone, mixed packing, when can solve single troilite packed column reactor startup
Between it is long, the residence time is long, floor space is big the problems such as, and single sulphur packed column reactor pH falls are big, water outlet pH mistakes
Low problem, have toggle speed fast, without seed sludge, the advantages that residence time is short, and floor space is small；2nd, reactor enters
Set on water pipe across pipe, water inlet pipe and across valve is respectively mounted on pipe, TN situations selection that can flexibly in secondary effluent
Whether reactor is passed through；3rd, without additional carbon, operating cost is low, high treating effect, sludge yield are few, backwashing period length,
It is easy to engineering application；4th, in device microorganism can endure it is hungry for a long time, can quick-recovery treatment effect soon after reruning.
Brief description of the drawings
Fig. 1 is the dyeing waste water autotrophic denitrification nitrogen rejection facility structural representation of the present invention；
Fig. 2 is removal effect figure of the device starting period to TN of the present invention.
Wherein：1- water inlet pipes；2- water intaking valves；3- surmounts pipe；4- surmounts pipe valve；5- backwashes water inlet pipe；6- backwash into
Water valve；7- backwashes intake pump；8- blow-down pipes；9- atmospheric valves；10- outlet pipes；11- outlet valves；12- backwashes outlet valve；13-
Hair rinses outlet pipe；14- troilite packing layers；15- sulphur packing layers；16- filter plates and strainer head；17- reactor bodies.
Embodiment
To make the technical problem to be solved in the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and tool
Body embodiment is described in detail.
The present invention is for existing treatment of dyeing wastewater factory because heterotrophic denitrification carbon source deficiency causes water outlet TN is exceeded to ask
Topic, there is provided a kind of dyeing waste water autotrophic denitrification nitrogen rejection facility and method.
As shown in figure 1, the structural representation for the device.The device includes water inlet pipe 1, water intaking valve 2, surmounts pipe 3, surmounts
Pipe valve 4, backwash water inlet pipe 5, backwash water intaking valve 6, backwash intake pump 7, blow-down pipe 8, atmospheric valve 9, outlet pipe 10, water outlet
Valve 11, backwash outlet valve 12, backwash outlet pipe 13 and reactor body 17, wherein, backwash water inlet pipe 5 is connected to reaction
The bottom of device main body 17, blow-down pipe 8 are connected to the side lower of reactor body 17, and water inlet pipe 1 is connected with backwash water inlet pipe 8, made
Water in water inlet pipe 1 and backwash water inlet pipe 8 enters reactor body 17 by the bottom of reactor body 17, outlet pipe 10 and instead
Rinse outlet pipe 13 and be connected to the top of reactor body 17；Surmount pipe 3 to be connected on water inlet pipe 1, surmount setting on pipe 3 and surmount pipe
Valve 4, water intaking valve 2 are arranged on water inlet pipe 1, and water intaking valve 2 is positioned at surmounting pipe 3 and the junction of water inlet pipe 1 and reactor body 17
Between the junction of water inlet pipe 1；Installation of relief valve 9 on blow-down pipe 8；Backwash and backwash water intaking valve 6 is set on water inlet pipe 5, instead
Rinse between water intaking valve 6 and reactor body 17 and backwash intake pump 7 is set；Outlet valve 11 is set on outlet pipe 10；Backwash
Backwash outlet valve 12 is set on outlet pipe 13；Set gradually from bottom to top in reactor body 17 filter plate and strainer head 16,
Troilite packing layer 14 and sulphur packing layer 15.
Wherein, reactor body 17 is the biochemical reactor of cylinder, and the top of sulphur packing layer 15 is away from reactor body 17
The distance of delivery port accounts for the 10% of the height of reactor body 17, and the volume ratio of troilite packing layer 14 and sulphur packing layer 15 is 1:
5, the packing material size of troilite packing layer 14 is 3~5mm, and sulfur content is more than 48%, and iron content is more than 43%, and sulphur packing layer 15 is filled out
Material particle diameter is 3~5mm, and sulfur content is more than 95%.
Embodiment 1：The quick startup of reactor
Experimental rig used by experiment as shown in figure 1, device using Wuxi treatment of dyeing wastewater factory secondary effluent as place
Manage object.All valves on first shutoff device, then by ferric sufide and brenstone filler by volume 1：5 layering fillings, first load sulphur
Iron ore recharges sulphur, and distance of the filler top layer away from delivery port accounts for the 10% of whole height for reactor.After filler loads, open
Water intaking valve 2 and outlet valve 11 are opened, surmounts pipe valve 4, backwash water intaking valve 6, atmospheric valve 9 and backwash outlet valve 12 and still keeps closing
Close, secondary effluent enters reaction unit by water inlet pipe 1, and passes through filter plate and strainer head 16, troilite packing layer 14 successively
With sulphur packing layer 15, eventually through row outside outlet pipe 10 or enter next processing unit.
Device uses the natural starting mode without seed sludge, and starting period operational factor is：Empty bed residence time 1h, waterpower
Load is 14.4m3/(m2D), starting period operational effect influent quality is：TN 9.95mg/L, NO3 -- N is 8.96mg/L, often
It takes device Inlet and outlet water, determines its water quality index, and as a result as shown in Fig. 2 device was completed to start in 3 days, hereafter water outlet TN is small
In 5mg/L, there is good denitrification effect.
Embodiment 2：High water-base fluid dyeing waste water denitrogenation
In continuous this experiment of progress of the reactor start-up successful subsequent of embodiment 1.
Using Wuxi treatment of dyeing wastewater factory secondary effluent as process object, operational factor is device：The empty bed residence time
20min, hydraulic load 43.2m3/(m2D), TN of intaking is 19.53mg/L, NO3 -- N is 17.78mg/L, and water outlet TN is
5.93mg/L, TN clearance are 69.7%, and water outlet TN is much better than《Urban wastewater treatment firm pollutant emission standard》(GB18918-
2002) in one-level A mark and《TAI HU AREA urban wastewater treatment firm and the main Sewage Water Emissions limit value of priority industry industry》
(DB32/T1072-2007) discharge standard in.
Embodiment 3：High water-base fluid simulated wastewater denitrogenation
In continuous this experiment of progress of the reactor start-up successful subsequent of embodiment 1.
Experiment water inlet is the simulated wastewater manually prepared, and operational factor is：Empty bed residence time 20min, hydraulic load are
43.2m3/(m2D), TN of intaking is 25.35mg/L, NO3 -- N is 23.43mg/L, and water outlet TN is 2.16mg/L, and TN clearances are
91.5%, realize efficient denitrification.
Embodiment 4：High water-base fluid municipal wastewater nitrogen
In continuous this experiment of progress of the reactor start-up successful subsequent of embodiment 1.
Using Shenyang municipal sewage plant secondary effluent as process object, operational factor is device：The empty bed residence time
20min, hydraulic load 43.2m3/(m2D), TN of intaking is 14.39mg/L, and water outlet TN is 1.01mg/L, and TN clearances are
93.0%, water outlet TN is better than《Water environment quality standard》(GB3838-2002) IV class water water standard in.
Described above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, on the premise of principle of the present invention is not departed from, some improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (6)
- A kind of 1. dyeing waste water autotrophic denitrification nitrogen rejection facility, it is characterised in that：Including water inlet pipe (1), water intaking valve (2), surmount Pipe (3), surmount pipe valve (4), backwash water inlet pipe (5), backwash water intaking valve (6), backwash intake pump (7), blow-down pipe (8), Atmospheric valve (9), outlet pipe (10), outlet valve (11), backwash outlet valve (12), backwash outlet pipe (13) and reactor body (17), wherein, backwash water inlet pipe (5) is connected to reactor body (17) bottom, and blow-down pipe (8) is connected to reactor body (17) side lower, water inlet pipe (1) connect with backwash water inlet pipe (5), make in water inlet pipe (1) and backwash water inlet pipe (5) Water enters reactor body (17) by reactor body (17) bottom, and outlet pipe (10) and backwash outlet pipe (13) are connected to Reactor body (17) top；Surmount pipe (3) to be connected on water inlet pipe (1), surmount setting on pipe (3) and surmount pipe valve (4), intake Valve (2) is arranged on water inlet pipe (1), and water intaking valve (2) is positioned at surmounting pipe (3) and water inlet pipe (1) junction and reactor body (17) between water inlet pipe (1) junction；Installation of relief valve (9) on blow-down pipe (8)；Backwash and recoil is set on water inlet pipe (5) Water intaking valve (6) is washed, backwash intake pump (7) is set between backwash water intaking valve (6) and reactor body (17)；Outlet pipe (10) Upper setting outlet valve (11)；Backwash and backwash outlet valve (12) is set on outlet pipe (13)；In reactor body (17) under Up set gradually filter plate and strainer head (16), troilite packing layer (14) and sulphur packing layer (15)；The distance away from reactor body (17) delivery port accounts for reactor body (17) height at the top of the sulphur packing layer (15) 10%；The volume ratio of the troilite packing layer (14) and sulphur packing layer (15) is 1:5.
- 2. dyeing waste water autotrophic denitrification nitrogen rejection facility according to claim 1, it is characterised in that：The reactor body (17) it is cylinder.
- 3. dyeing waste water autotrophic denitrification nitrogen rejection facility according to claim 1, it is characterised in that：The troilite filler Layer (14) packing material size is 3~5mm, and sulfur content is more than 48%, and iron content is more than 43%.
- 4. dyeing waste water autotrophic denitrification nitrogen rejection facility according to claim 1, it is characterised in that：The sulphur packing layer (15) packing material size is 3~5mm, and sulfur content is more than 95%.
- 5. using the dyeing waste water denitrogenation method of the dyeing waste water autotrophic denitrification nitrogen rejection facility described in claim 1, its feature It is：In the case where treatment of dyeing wastewater factory secondary effluent TN is up to standard, closes water intaking valve (2), backwash water intaking valve (6) and put Empty valve (9), unlatching surmounts surmounts pipe valve (4) on pipe (3), and current directly cross over autotrophic denitrification denitrogenation by surmounting pipe (3) Device enters next processing unit or directly outer row, autotrophic denitrification device are in idle state；In the case where treatment of dyeing wastewater factory secondary effluent TN is exceeded, shutoff device surmounts pipe valve (4), backwash water intaking valve (6) outlet valve (12) and atmospheric valve (9), are backwashed, opens water intaking valve (2) and outlet valve (11), secondary effluent passes through water inlet pipe (1) reactor body (17) is entered, the water inlet into reactor body (17) first passes through filter plate and strainer head (16) is uniformly matched somebody with somebody Enter troilite packing layer (14) after water, subsequently into sulphur packing layer (15), finally, sewage leads to after processing realizes that TN is up to standard Cross outlet pipe (10) discharge on device top or enter next processing unit；Continuously run, in the case of loss of flood peak increase in the device, closing surmounts pipe valve (4), atmospheric valve (9), water intaking valve (2), outlet valve (11), backwash water intaking valve (6) and backwash outlet valve (12) are opened, and opens backwash intake pump (7), it is right The device is backwashed.
- 6. dyeing waste water autotrophic denitrification denitrogenation method according to claim 5, it is characterised in that：The backwashing water is dirt Water factory's secondary effluent, backwashing time are 10~15min, and by backwashing outlet pipe (13), to be discharged into sewage plant total for backwash water outlet Water inlet end.
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| CN106630410A (en) * | 2016-12-14 | 2017-05-10 | 江南大学 | Sewage nitrogen and phosphorus removal device and application thereof |
| CN106946415A (en) * | 2017-05-05 | 2017-07-14 | 河南弘康环保科技有限公司 | A kind of denitrogenation of waste water processing system and denitrification treatment process |
| CN107010724B (en) * | 2017-05-24 | 2019-03-12 | 中国科学院生态环境研究中心 | A method of it being sustained electron donor and carries out sewage deep denitrogenation using it |
| CN107176702B (en) * | 2017-07-31 | 2019-12-13 | 南京大学 | Sewage treatment method for enhancing synchronous nitrogen and phosphorus removal in sulfur autotrophic denitrification process |
| CN108423826B (en) * | 2018-04-11 | 2020-10-09 | 中国环境科学研究院 | Improvement A2O and sulfur autotrophic combined nitrogen and phosphorus removal reactor and sewage treatment method |
| CN108706727B (en) * | 2018-04-19 | 2021-07-27 | 中国矿业大学 | Baffling type anaerobic autotrophic denitrification biological reaction process and device |
| CN108503026B (en) * | 2018-04-19 | 2021-07-27 | 中国矿业大学 | Urban secondary effluent sulfur matrix circulating autotrophic nitrogen removal method |
| CN108439613B (en) * | 2018-04-23 | 2020-06-26 | 南京大学 | Modularized sewage nitrogen and phosphorus removal treatment process based on sulfur autotrophic denitrification |
| CN110407321A (en) * | 2019-08-14 | 2019-11-05 | 中国矿业大学 | Multilevel hierarchy packed-bed reactor city secondary effluent advanced nitrogen phosphorus removing method |
| CN110776219A (en) * | 2019-12-10 | 2020-02-11 | 江南大学 | Advanced treatment device for printing and dyeing wastewater pollutants and application thereof |
| CN110963644B (en) * | 2019-12-11 | 2021-10-15 | 安徽建筑大学 | High-nitrate industrial wastewater denitrification pretreatment system, method and application thereof |
| CN111018132B (en) * | 2019-12-19 | 2021-09-28 | 南京大学 | Water treatment device for nitrogen and phosphorus removal and treatment method thereof |
| CN112919626B (en) * | 2021-01-21 | 2022-03-11 | 臻和慧联(浙江)环境科技有限公司 | Sulfur-iron autotrophic denitrification device and reaction control method |
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| CN102642981B (en) * | 2012-04-17 | 2013-12-11 | 清华大学 | Denitrification dephosphorization device |
| CN205500909U (en) * | 2016-03-21 | 2016-08-24 | 北京科技大学 | Printing and dyeing wastewater autotrophy denitrification device |
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Effective date of registration: 20220505 Address after: 100083 No. 30, Haidian District, Beijing, Xueyuan Road Patentee after: University OF SCIENCE AND TECHNOLOGY BEIJING Patentee after: CECEP WATER ENGINEERING Co.,Ltd. Patentee after: Wuxi Huishan environmental water Co.,Ltd. Address before: 100083 No. 30, Haidian District, Beijing, Xueyuan Road Patentee before: University OF SCIENCE AND TECHNOLOGY BEIJING Patentee before: Cecep Water Engineering Co., Ltd |
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