CN110066076A - A kind of deep denitrogenation process of low concentration total nitrogen waste water - Google Patents
A kind of deep denitrogenation process of low concentration total nitrogen waste water Download PDFInfo
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- CN110066076A CN110066076A CN201910499555.8A CN201910499555A CN110066076A CN 110066076 A CN110066076 A CN 110066076A CN 201910499555 A CN201910499555 A CN 201910499555A CN 110066076 A CN110066076 A CN 110066076A
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
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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
- C02F3/2826—Anaerobic digestion processes using anaerobic filters
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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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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- Organic Chemistry (AREA)
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- Biodiversity & Conservation Biology (AREA)
- Biological Treatment Of Waste Water (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The present invention is not easy situation up to standard for urban wastewater treatment firm water outlet total nitrogen, a kind of waste water advanced denitrification process that total nitrogen removal effect is good is provided, includes the following steps: to carry out denitrogenation adsorption treatment 1), by ion exchange resin reactor to low concentration total nitrogen waste water to be processed;2) the resin 10% ~ 15%NaCl resin desorption liquid for having adsorbed nitrate nitrogen, is impregnated into 2h, removes the nitrate nitrogen in resin；3), desorption liquid removes nitrate nitrogen using denitrification bio-filter；4), the resin in step 2 can be reused for the absorption of nitrate nitrogen in waste water after being desorbed.The technique combines ion exchange technique, microorganism enhanced technology and anaerobic denitrifying technology, removes total nitrogen using ion exchange resin, then enters denitrification bio-filter after desorption liquid is diluted.The anaerobic denitrifying biomembrane for forming salt tolerant in pond on filler by way of taming in advance, effectively increases the denitrification of biological denitrification reactor, to achieve the purpose that total nitrogen removes in resin desorption liquid.
Description
Technical field
The present invention relates to a kind of technique up to standard of wastewater treatment, in particular to a kind of advanced nitrogen of low concentration total nitrogen waste water
Technique.
Technical background
Currently, with China's urbanization and industrialized development, a large amount of nitrogenous sanitary sewage and industrial wastewater are produced,
Therefore result in the large-scale outbreak of water eutrophication and cyanobacterial bloom so as to cause entire aquatic ecosystem function by
To destruction.Major part urban wastewater treatment firm is still " urban wastewater treatment firm pollutant emission standard " (GB18918- at present
2002) level-one B or secondary discharge standard, for promoted city city appearance, urban wastewater treatment firm mention mark transformation it is very urgent.
Currently used total nitrogen removal technology mainly includes biological denitrificaion method, chemical reduction method, ion-exchange, reverse osmosis
Method and absorption method.Its ion exchange methods is answered since it has the advantages that simple process, easy to operate, engineering investment cost is few
During sewage plant denitrogenation processing.But with the use of ion exchange resin, the processing handling problems of desorption liquid become
An important factor for limitation ion exchange resin is applied in water process.Since desorption liquid coloration is deep, organic concentration is high, salt content
It is high, it is difficult to handle, therefore the disposition of desorption liquid is put forward new requirements.200810180280.3 disclosure of Chinese Patent Application No.
The method of total phosphorus and nitrate, removal rate can reach 95% or more in a kind of removal municipal wastewater treatment plant secondary effluent.But it does not relate to
And the processing problem of desorption liquid.In addition Chinese Patent Application No. CN108314269A disclose a kind of processing of acid-basic regenerated waste liquids in water and
The system and method for reuse, this method use macropore denitrogenation resin adsorption technical treatment sewage plant tail water, use sodium chloride solution
Regeneration, regeneration liquid waste are collected to waste liquid pool, enter back into denitrification pond, subsequently enter MBR membrane reactor.This method can realize macropore
The processing and reuse of denitrogenation acid-basic regenerated waste liquids in water, but realize that mud-water separation is easy to block film using MBR film, and
MBR Membrane cleaning is frequent, expensive.
Denitrification refers to using organic matter carbon source as electron donor, using nitrate or nitrite as electron acceptor
Oxidation-reduction process, be the important step in denitrification process.Denitrifying bacterium occupies critical role in denitrification, can
To say that the amount of denitrifying bacterium in waste water directly affects the process of denitrification.Chinese Patent Application No. 201710610573.X is public
A kind of method for taming packed column reactor processing sanitary sewage in advance using aerobic denitrifying bacteria is opened.Chinese Patent Application No.
CN201711408823 disclose it is a kind of using embedding denitrifying bacterium carrier in reactor to sewage carry out advanced nitrogen processing
Method.Water outlet total nitrogen is all satisfied " urban wastewater treatment firm pollutant emission standard " level-one A standard.Accordingly, it is considered to by ion
Exchange process is combined with denitrification biotechnology, by improving technological parameter, makes standard water discharge, will be for low concentration total nitrogen waste water
New technological approaches is opened up in processing.
Summary of the invention
The purpose of the present invention is being not easy situation up to standard for urban wastewater treatment firm water outlet total nitrogen, a kind of low concentration is provided
The deep denitrogenation process of total nitrogen waste water, intend to solve ion exchange resin removal total nitrogen during desorption liquid dispose the problem of.
In order to achieve the above objectives, the present invention provides a kind of deep denitrogenation process of low concentration total nitrogen waste water, including step is such as
Under:
1) denitrogenation adsorption treatment, is carried out to low concentration total nitrogen waste water to be processed by ion exchange resin reactor:
A, resin pre-processes: filling completely the resin column in ion exchange resin reactor with resin, then uses 10%-15%NaCl
Resin desorption liquid impregnates 2 h, and pure water is with 4~6 BV/h flow velocitys rinse resin column；
B, exchange process: low concentration total nitrogen waste water is with 4~8 BV/h flow velocitys counterflow through resin column, and the total nitrogen in waste water is by resin
Grain absorption；
2),Resin 10% ~ 15%NaCl resin desorption the liquid for having adsorbed nitrate nitrogen is impregnated into 2h,Remove the nitrate nitrogen in resin；
3), desorption liquid removes nitrate nitrogen using denitrification bio-filter；
A, cultured salt tolerant denitrifying bacterium or denitrification dry powder or denitrification is added into the reactor added with ceramics filling
Solution constructs denitrification bio-filter；
B, desorption liquid dilutesCentainlyAfter multiple, the desorption liquid total nitrogen concentration after dilution is in 100 mg/L or less, to after dilution
Desorption liquid in carbon source is added；
c、Diluted desorption liquid passes throughPeristaltic pumpIt is back to back denitrification bio-filter, controlThe revolving speed of peristaltic pump makes its flow velocity
Control is 0.01~0.03 L/hGuarantee certain water yield, and facilitates the formation of biomembrane；Standard water discharge discharge.
4), the resin in step 2 can be reused for the absorption of nitrate nitrogen in waste water after being desorbed.
Further improved to be: the resin is macroporous type polystyrene strong basic type anion-exchange resin.
Further improved to be: salt tolerant denitrifying bacterium, dry powder or solution are added to the reaction of ceramics filling at water inlet initial stage
In device.
Further improved to be: the carbon source is carbonaceous organic material, and the amount that carbon source is added guarantees that water inlet C/N ratio is about 3:1~
8:1.
Further improved to be: the denitrification bio-filter usesContinuous flowAnaerobic biofilter, ceramics filling partial size
It is 5~8 mm, the water inlet of continuous flow anaerobic biofilter lower part, top water outlet, continuous flow anaerobic biofilter are opaque.
The beneficial effects of the present invention are: ion exchange technique, microorganism enhanced technology are mutually tied with anaerobic denitrifying technology
It closes, removes total nitrogen using ion exchange resin, then enter denitrification biology in the case where adding carbon source after desorption liquid is diluted
Filter tank.Ceramics filling is set in pond, adds a certain amount of salt tolerant denitrifying bacterium, the flow velocity kept constant and C/N ratio, is led toCross pre- domestication Mode the anaerobic denitrifying biomembrane of salt tolerant is formed on filler, it is effectively increased the biology of anaerobism salt tolerant denitrifying bacterium
Amount, improves abundance ratio of the bacterial strain in microbiologic population, effectively increases the denitrification of biological denitrification reactor,
And guarantee anaerobic condition, so that salt tolerant denitrifying bacterium is enriched in haydite surface, constructs desorption liquid efficient denitrification system.To
Achieve the purpose that in resin desorption liquid that total nitrogen removes, and absorption property is good again for the resin after denitrogenation, can Reusability, warp
The waste water and desorption liquid of processing can qualified discharges.
UsingContinuous flowAnaerobic biofilter inside sets ceramics filling, lower part water inlet as reactor, and top is discharged,It is not necessarily to SettingIt is oxygenated facility；Reactor height is about 30 cm or so, and the ceramics filling being arranged inside is 15~17 cm high, partial size is 5 mm
~8 mm.Shell of reactor is opaque material.Above-mentioned operating condition can form anaerobic environment in denitrification bio-filter, have
Effect is enriched salt tolerant denitrifying bacterium, and makes salt tolerant denitrifying bacterium in haydite surface biofilm, and the growth for salt tolerant denitrifying bacterium provides
Good growing environment, to improve the nitric efficiency of the desorption liquid after inhaling nitrogen.It is total that successful low concentration is constructed by this method
The denitrification process of nitrogen waste water is that 30 mg/L urban wastewater treatment firm water outlet below has stronger denitrification ability to TN.
Detailed description of the invention
Fig. 1 is process flow chart.
Specific embodiment
It is described in further detail below with reference to embodiment.
Embodiment 1
Shown in referring to Fig.1, the present embodiment one discloses a kind of deep denitrogenation process of low concentration total nitrogen waste water, and the present embodiment is for receipts
The waste water for collecting certain urban wastewater treatment firm output is handled, and through detecting, waste water raw water quality TN content is 20-30 mg/L,
Specific treatment process is as follows:
1), low concentration total nitrogen waste water with 6 BV/h flow velocitys by being equipped with the reactor of ion exchange resin, it is total in processed waste water
Nitrogen is about 5 mg/L, can qualified discharge；
A, resin pre-processes: being filled the resin column in ion exchange resin reactor completely with resin, resin is macroporous type benzene second
Alkene system strong basic type anion-exchange resin, resin is using D205 type resin alternatively property denitrogenation resin in this example；Then it uses
12%NaCl resin desorption liquid impregnates 2 h, rinses resin column into pure water with 6BV/h flow velocity;
B, exchange process: low concentration total nitrogen waste water counterflows through resin column with 6BV/h flow velocity, and the total nitrogen in waste water is inhaled by resin particle
It is attached；
2),The resin 12%NaCl resin desorption liquid for having adsorbed nitrate nitrogen is impregnated into 2h,Remove the nitrate nitrogen in resin, resin
Renewable use;
3), desorption liquid removes nitrate nitrogen using denitrification bio-filter；About 2000 mg/L of TN in desorption liquid in the embodiment；
A, it intakes initial stage, after the salt tolerant denitrifying bacterium of a certain amount of culture is mixed with pure water, from the water inlet of denitrification bio-filter
Salt tolerant denitrifying bacterium is squeezed into denitrification bio-filter at mouthful；Denitrification bio-filter is added with ceramics filling；Ceramics filling
Partial size is 6 mm.
B, desorption liquid dilutes20After multiple, the desorption liquid total nitrogen concentration after dilution is in 100 mg/L or less, to dilution
C source of the ethyl alcohol as salt tolerant denitrifying bacterium is added in desorption liquid afterwards, the amount that ethyl alcohol is added guarantees that water inlet C/N ratio is about 5:1, this
It is about 500 mg/L that the amount of alcohol being added in embodiment, which is converted into COD,；
c、The denitrification bio-filter usesContinuous flowAnaerobic biofilter, the water inlet of continuous flow anaerobic biofilter lower part, on
Portion's water outlet, continuous flow anaerobic biofilter is opaque, and diluted desorption liquid passes throughPeristaltic pumpIt is back to back denitrification bio-filter,
ControlThe revolving speed of peristaltic pump,It is 0.1 rpm that its revolving speed is arranged in embodiment, and flow velocity is about 0.015 L/h at this time, it is therefore intended thatIt protects Certain water yield is demonstrate,proved, and facilitates the formation of biomembrane,In the reactor, the salt tolerant denitrifying bacterium of enrichment culture is in haydite table
Face biofilm, can be improved nitric efficiency,So thatStandard water discharge discharge.
4), the resin in step 2 can be reused for the absorption of nitrate nitrogen in waste water after being desorbed.
Embodiment 2
Shown in referring to Fig.1, the present embodiment two discloses a kind of deep denitrogenation process of low concentration total nitrogen waste water, and the present embodiment is for receipts
The waste water for collecting certain urban wastewater treatment firm output is handled, and through detecting, waste water raw water quality TN content is 18-22 mg/L,
Specific treatment process is as follows:
1), low concentration total nitrogen waste water with 6 BV/h flow velocitys by being equipped with the reactor of ion exchange resin, it is total in processed waste water
Nitrogen is about 4 mg/L, can qualified discharge；
A, resin pre-processes: being filled the resin column in ion exchange resin reactor completely with resin, resin is macroporous type benzene second
Alkene system strong basic type anion-exchange resin, resin is using D205 type resin alternatively property denitrogenation resin in this example；Then it uses
10%NaCl resin desorption liquid impregnates 2 h, rinses resin column into pure water with 6BV/h flow velocity;
B, exchange process: low concentration total nitrogen waste water counterflows through resin column with 6BV/h flow velocity, and the total nitrogen in waste water is inhaled by resin particle
It is attached；
2),The resin 10%NaCl resin desorption liquid for having adsorbed nitrate nitrogen is impregnated into 2h,Remove the nitrate nitrogen in resin, resin
Renewable use;
3), desorption liquid removes nitrate nitrogen using denitrification bio-filter；About 1500 mg/L of TN in desorption liquid in the embodiment；
A, it intakes initial stage, after the salt tolerant denitrifying bacterium of a certain amount of culture is mixed with pure water, from the water inlet of denitrification bio-filter
Salt tolerant denitrifying bacterium is squeezed into denitrification bio-filter at mouthful；Denitrification bio-filter is added with ceramics filling；Ceramics filling
Partial size is 6 mm.
B, desorption liquid dilutes15After multiple, the desorption liquid total nitrogen concentration after dilution is in 100 mg/L or less, to dilution
C source of the ethyl alcohol as salt tolerant denitrifying bacterium is added in desorption liquid afterwards, the amount that ethyl alcohol is added guarantees that water inlet C/N ratio is about 4:1, this
It is about 400 mg/L that the amount of alcohol being added in embodiment, which is converted into COD,；
c、The denitrification bio-filter usesContinuous flowAnaerobic biofilter, the water inlet of continuous flow anaerobic biofilter lower part, on
Portion's water outlet, continuous flow anaerobic biofilter is opaque, and diluted desorption liquid passes throughPeristaltic pumpIt is back to back denitrification bio-filter,
ControlThe revolving speed of peristaltic pump,It is 0.1 rpm that its revolving speed is arranged in embodiment, and flow velocity is about 0.015 L/h at this time, it is therefore intended thatIt protects Certain water yield is demonstrate,proved, and facilitates the formation of biomembrane,In the reactor, the salt tolerant denitrifying bacterium of enrichment culture is in haydite table
Face biofilm, can be improved nitric efficiency,So thatStandard water discharge discharge.
4), the resin in step 2 can be reused for the absorption of nitrate nitrogen in waste water after being desorbed.
The beneficial effects of the present invention are: ion exchange technique, microorganism enhanced technology are mutually tied with anaerobic denitrifying technology
It closes, removes total nitrogen using ion exchange resin, then enter denitrification biology in the case where adding carbon source after desorption liquid is diluted
Filter tank.Ceramics filling is set in pond, adds a certain amount of salt tolerant denitrifying bacterium, the flow velocity kept constant and C/N ratio, is led toCross pre- domestication Mode the anaerobic denitrifying biomembrane of salt tolerant is formed on filler, it is effectively increased the biology of anaerobism salt tolerant denitrifying bacterium
Amount, improves abundance ratio of the bacterial strain in microbiologic population, effectively increases the denitrification of biological denitrification reactor,
And guarantee anaerobic condition, so that salt tolerant denitrifying bacterium is enriched in haydite surface, constructs desorption liquid efficient denitrification system.To
Achieve the purpose that in resin desorption liquid that total nitrogen removes, and absorption property is good again for the resin after denitrogenation, can Reusability, warp
The waste water and desorption liquid of processing can qualified discharges.
UsingContinuous flowAnaerobic biofilter inside sets ceramics filling, lower part water inlet as reactor, and top is discharged,It is not necessarily to SettingIt is oxygenated facility；Reactor height is about 30 cm or so, and the ceramics filling being arranged inside is 15~17 cm high, partial size is 5 mm
~8 mm.Shell of reactor is opaque material.Above-mentioned operating condition can form anaerobic environment in denitrification bio-filter, have
Effect is enriched salt tolerant denitrifying bacterium, and makes salt tolerant denitrifying bacterium in haydite surface biofilm, and the growth for salt tolerant denitrifying bacterium provides
Good growing environment, to improve the nitric efficiency of the desorption liquid after inhaling nitrogen.It is total that successful low concentration is constructed by this method
The denitrification process of nitrogen waste water is that 30 mg/L urban wastewater treatment firm water outlet below has stronger denitrification ability to TN.
The object of the invention can also may be implemented by denitrification dry powder or the replacement of denitrification solution in the salt tolerant denitrifying bacterium.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the description in above embodiment and specification only illustrates the present invention
Principle, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these variation and
Improvement is both fallen in the scope of protection of present invention.The claimed scope of the invention is by appended claims and its equivalent
Object defines.
Claims (5)
1. a kind of deep denitrogenation process of low concentration total nitrogen waste water, it is characterised in that: comprise the following steps that
1) denitrogenation adsorption treatment, is carried out to low concentration total nitrogen waste water to be processed by ion exchange resin reactor:
A, resin pre-processes: filling completely the resin column in ion exchange resin reactor with resin, then uses 10%-15%NaCl
Resin desorption liquid impregnates 2 h, and pure water is with 5~7BV/h flow velocity rinses resin column；
B, exchange process: low concentration total nitrogen waste water is with 4~8 BV/h flow velocitys counterflow through resin column, and the total nitrogen in waste water is by resin
Grain absorption；
2),Resin 10% ~ 15%NaCl resin desorption the liquid for having adsorbed nitrate nitrogen is impregnated into 2h,Remove the nitrate nitrogen in resin；
3), desorption liquid removes nitrate nitrogen using denitrification bio-filter；
A, cultured salt tolerant denitrifying bacterium or denitrification dry powder or denitrification is added into the reactor added with ceramics filling
Solution constructs denitrification bio-filter；
B, desorption liquid dilutesCentainlyAfter multiple, the desorption liquid total nitrogen concentration after dilution is in 100 mg/L or less, to after dilution
Desorption liquid in carbon source is added；
c、Diluted desorption liquid passes throughPeristaltic pumpIt is back to back denitrification bio-filter, controlThe revolving speed of peristaltic pump makes its flow velocity
Control is 0.01~0.03 L/h,Guarantee certain water yield, and facilitates the formation of biomembrane；Standard water discharge discharge；
4), the resin in step 2 can be reused for the absorption of nitrate nitrogen in waste water after being desorbed.
2. the deep denitrogenation process of low concentration total nitrogen waste water according to claim 1, it is characterised in that: the resin is
Macroporous type polystyrene strong basic type anion-exchange resin.
3. the deep denitrogenation process of low concentration total nitrogen waste water according to claim 1, it is characterised in that: salt tolerant denitrification
Bacterium, dry powder or solution are in the reactor that water inlet initial stage is added to ceramics filling.
4. the deep denitrogenation process of low concentration total nitrogen waste water according to claim 1 or 2 or 3, it is characterised in that: the carbon
Source is carbonaceous organic material, and the amount that carbon source is added guarantees that water inlet C/N ratio is about 3:1~8:1.
5. the deep denitrogenation process of low concentration total nitrogen waste water according to claim 4, it is characterised in that: the denitrification is raw
Object filter tank usesContinuous flowAnaerobic biofilter, ceramics filling partial size are 5~8 mm, the water inlet of continuous flow anaerobic biofilter lower part,
Top water outlet, continuous flow anaerobic biofilter are opaque.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112266050A (en) * | 2020-11-03 | 2021-01-26 | 艾西姆(辽宁)环境技术有限公司 | Process method and device for advanced treatment of nitrate nitrogen in water |
| CN114105363A (en) * | 2021-11-30 | 2022-03-01 | 深圳同道环保科技有限公司 | Integrated high-efficient denitrogenation sewage treatment device |
| CN115448511A (en) * | 2022-10-25 | 2022-12-09 | 北京华德创业环保设备有限公司 | Deep treatment method for non-film mine water |
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| CN115448511A (en) * | 2022-10-25 | 2022-12-09 | 北京华德创业环保设备有限公司 | Deep treatment method for non-film mine water |
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