CN104787882B - A kind of method of low carbon-nitrogen ratio sewage denitrification advanced nitrogen - Google Patents
A kind of method of low carbon-nitrogen ratio sewage denitrification advanced nitrogen Download PDFInfo
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- CN104787882B CN104787882B CN201510189515.5A CN201510189515A CN104787882B CN 104787882 B CN104787882 B CN 104787882B CN 201510189515 A CN201510189515 A CN 201510189515A CN 104787882 B CN104787882 B CN 104787882B
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/163—Nitrates
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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
- C02F2305/00—Use of specific compounds during water treatment
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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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
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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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/14—Additives which dissolves or releases substances when predefined environmental conditions are reached, e.g. pH or temperature
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Abstract
The present invention is a kind of method of low carbon-nitrogen ratio sewage denitrification advanced nitrogen, including：（1）First paragraph reactor A is by the use of corn cob as supplementary carbon source and biofilm carrier denitrogenation；（2）Second segment reactor B is by the use of bamboo charcoal as the further denitrogenation of fixed bed carried microorganism；（3）Raw water arranges water entry in two reactor respectively, can carry out proportion switch according to raw water quality difference.Advantage：（1）Can slow release Organic substance, secondary pollution will not be produced, not result in water outlet COD exceeded；（2）Nitrate nitrogen in low carbon-nitrogen ratio sewage has preferable removal effect and can be while removing the ammonia nitrogen in sewage；（3）Secondary pollution will not be produced, time of staying of nitrate nitrogen can be extended so as to improving effluent quality；（4）The denitrification effect of sewage, nitrate nitrogen removal efficiency more than 80%, stable water outlet can be strengthened；（5）This is simple for process, and low cost, floor space are little, and the time of staying is short, and non-power consumption has a good application prospect.
Description
Technical field
The present invention relates to a kind of method of low carbon-nitrogen ratio sewage denitrification advanced nitrogen, belongs to water technology neck
Domain.
Background technology
At present, the discharge capacity of China's majority secondary effluent from sewage treatment plant is big, faces water outlet total nitrogen concentration (wherein nitrate
Nitrogen accounts for 78% or so) unstable, do not reach the problem of urban wastewater treatment firm pollutant emission one-level B standard.Therefore denitrogenation becomes
The main target of advanced treating secondary water outlet.
Ion exchange, reverse osmosiss and biological denitrification can remove nitrate, but ion exchange and reverse osmosis process due to
The reasons such as nitrate nitrogen, expensive, processing cost be higher can not thoroughly be removed and fail extensively application.
And biological denitrification process is a kind of cost-effective denitrification process, wherein denitrification filter pool（DNBF）In anoxia condition
Nitrate nitrogen and nitrite nitrogen are changed into N by the use of carbon source as electron donor by lower denitrifying bacterium2From water body release and
Remove, and little, effluent quality is good, anti-shock loading is strong, startup is fast have the advantages that taking up an area.
Carbon source deficiency is the key factor for restricting biological denitrificaion efficiency, and traditional liquid carbon source is costly, needs adding equipment,
Easy excess is added, and novel solid carbon source can reduce cost, based on some cheap solid organic matters, including cellulose
The natural plants of class material and some biodegradable polymers etc. are in interior new carbon source.
Content of the invention
The present invention provides a kind of method of low carbon-nitrogen ratio sewage denitrification advanced nitrogen, its object is to can slow release organic
Thing, will not produce secondary pollution, not result in water outlet COD exceeded.Extend the time of staying of nitrate nitrogen, improve effluent quality,
The denitrification effect of sewage, nitrate nitrogen removal efficiency more than 80% can be strengthened.
The technical solution of the present invention：The method of low carbon-nitrogen ratio sewage denitrification advanced nitrogen, walks including following technique
Suddenly：
（1）First paragraph reactor A is by the use of corn cob as supplementary carbon source and biofilm carrier denitrogenation；
（2）Second segment reactor B is by the use of bamboo charcoal as the further denitrogenation of fixed bed carried microorganism；
（3）Raw water arranges water entry in two reactor respectively, can carry out proportion switch according to raw water quality difference.
Advantages of the present invention：
（1）By the use of biomass corn cob as carbon source, secondary pollution will not be produced, while the Organic substance release 2 of corn cob
It is i.e. stable, and its Organic substance release concentration is subject to the response control of nitrate from waste water nitrogen concentration, is that a kind of cheap high-quality is delayed
Release carbon source material.
（2）Corn cob simultaneously as biofilm carrier, its rough surface, for microorganism growth and breeding provide good
Place, with load Biomass big the characteristics of, to low carbon-nitrogen ratio sewage in nitrate nitrogen have preferable removal effect, and energy
Remove the ammonia nitrogen in sewage simultaneously, consume dissolved oxygen, guarantee is provided for the efficient denitrification of bamboo charcoal reactor.Average removal 1g nitric acid
Salt nitrogen only needs 2.7g corn cobs, and far below Caulis et Folium Oryzae as consumption during solid carbon source, denitrogenation cost is relatively low.
（3）By the use of biomass bamboo charcoal as fixed bed fillers, secondary pollution will not be produced, bamboo charcoal has good graininess,
There is certain intensity simultaneously, with wearability and durability, be a kind of good filler, and biofilm is fast, in combination with bamboo charcoal
Absorption and biodegradation double effects, can extend the time of staying of nitrate nitrogen and Organic substance, so as to improve effluent quality.
（4）Series flow of sewage through static bed biomembrane reactor in corn cob, and gradually form life in Semen Maydiss wicking surface
Thing film, by corn cob reactor and bamboo charcoal reactors in series, can strengthen the denitrification effect of sewage, and the anti-buffer capacity of the device
Power is strong, and stable water outlet, nitrate nitrogen clearance reach more than 82%, and denitrification rate reaches 0.26 kg/ (m3D), higher than report
The single solid carbon source such as paper, Cotton Gossypii, straw, and the persistent period is long, after continuously running 57 days, nitrate nitrogen clearance remains to reach
66%, after changing corn cob, nitrate nitrogen clearance rises to more than 80% immediately.Can be beautiful according to the water quality characteristic of water inlet, adjustment
Rice core reactor was combined with the time of staying of bamboo charcoal reactor so that Organic substance is maximally utilized and nitrate nitrogen is obtained most
Big degree is removed.
（5）This is simple for process, and low cost, floor space are little, and the time of staying is short, and non-power consumption is particularly suited for
The advanced nitrogen of municipal sewage plant's tail water is processed, and water outlet after process can carry out middle water better than country-level emission standard A
Reuse, has a good application prospect.
Specific embodiment
The method of carbon-nitrogen ratio sewage denitrification advanced nitrogen, comprises the technical steps that：
（1）First paragraph reactor A is by the use of corn cob as supplementary carbon source and biofilm carrier denitrogenation；
（2）Second segment reactor B is by the use of bamboo charcoal as the further denitrogenation of fixed bed carried microorganism；
（3）Raw water arranges water entry in two reactor respectively, can carry out proportion switch according to raw water quality difference.
Described corn cob is the corn cob after being exposed to the sun, and it is 1-3cm that corn cob intercepts into length by specification, is placed in reactor
As solid carbon source and biofilm carrier, filling rate 100% in A；Described bamboo charcoal is the solid tablet that bamboo is fired,
Crush by specification, sieve obtain the bamboo charcoal of 2mm-2cm after be put in clear water and soak, be placed in reactor B biological as fixed bed
Filler, filling rate 100%.
Two sections of described denitrification process, including：
（1）PH is passed through to reactor B for 6-9, simulated wastewaters of the C/N for 4-5, continuum micromeehanics mode biofilm, in water outlet
Indicate that pollutant COD, nitrate nitrogen, ammonia nitrogen removal frank keep basicly stable, biological load amount reaches 9-45g/L on filler, depending on extension
Film success；
（2）Reactor A is connected with B, the sewage being passed through is characterized as nitrate nitrogen total measurement (volume) load 0.1-1.3kg/ (m3•
D), hydraulic detention time 0.5-3h.
（3）According to water inlet carbon-nitrogen ratio and nitrate nitrogen concentration adjustment hydraulic detention time so that Organic substance can keep most
Good burst size, the demand that can either meet denitrification denitrogenation do not result in the rising of outlet water organic substance yet.When carbon-nitrogen ratio is less than
2.6, when nitrate nitrogen concentration is less than or equal to 25mg/L are equal to, the adjustment corn cob section time of staying is 1.6h, when bamboo charcoal section is stopped
Between 0.3h, total denitrification percent is up to 82%；When carbon-nitrogen ratio is less than or equal to 2.6, and nitrate nitrogen concentration is more than 25mg/L, corn cob is adjusted
The section time of staying is 1.7h, bamboo charcoal section time of staying 1.3h, and total denitrification percent is up to 80%；When carbon-nitrogen ratio is more than 2.6, the concentration of nitrate nitrogen
During less than or equal to 25mg/L, corn cob section time of staying 1.1h, bamboo charcoal section time of staying 0.4h is adjusted, total denitrification percent is up to 80%.
Embodiment 1
（1）After corn cob is exposed to the sun, intercepts by the specification of 1cm, be placed in reactor A, as solid carbon source and microorganism
Membrane carrier；
（2）The bamboo charcoal that bamboo is fired is crushed, sieving obtains the bamboo charcoal of 2-4mm, be put in clear water and soak, treat biofilm
Use；
（3）Bamboo charcoal after using immersion is placed in fixed bed reactors B as biologic packing material, is passed through COD concentration for 100mg/
L, nitrate nitrogen concentration are 20 mg/L, and ammonia nitrogen concentration is 4 mg/L, and total phosphorus concentration is the simulated wastewater of 1 mg/L, continuum micromeehanics
Mode biofilm, the instruction pollutant COD in water outlet, nitrate nitrogen, ammonia nitrogen removal frank keep basicly stable, respectively 90%, 80%,
98%, depending on biofilm success；
（4）Reactor A is connected with B, the reacted device A of the sewage being passed through passes through water outlet after reactor B, carries out anoxia anti-
Nitrification denitrogenation processing, nitrate nitrogen volumetric loading are 0.32kgNO3-N/(m3D), during the hydraulic retention of A reactors and B reactors
Between be respectively 1.6h and 0.3h.
Sanitary sewage is processed using the inventive method, result is as follows：
57.60 mg/L of inlet COD concentration, 19.38 mg/L of effluent COD concentration；5.00 mg/L of influent ammonium concentration, goes out
2.85 mg/L of water ammonia nitrogen concentration；Water inlet nitrate nitrogen concentration 19.30 mg/L, 3.86 mg/L of water outlet nitrate nitrogen concentration.
Embodiment 2
Other conditions are constant, and it is 0.25kgNO to change nitrate nitrogen volumetric loading in embodiment 13-N/(m3D), A reactors
1.6h and 0.3h is respectively with the hydraulic detention time of B reactors.
Sanitary sewage is processed using the inventive method, result is as follows：
42.60 mg/L of inlet COD concentration, 5.09 mg/L of effluent COD concentration；3.47 mg/L of influent ammonium concentration, water outlet
0.69 mg/L of ammonia nitrogen concentration；Water inlet nitrate nitrogen concentration 21.64 mg/L, 3.90 mg/L of water outlet nitrate nitrogen concentration.
Claims (1)
1. a kind of method of low carbon-nitrogen ratio sewage denitrification advanced nitrogen, is characterized in that the method is comprised the technical steps that：
（1）First paragraph reactor A is by the use of corn cob as supplementary carbon source and biofilm carrier denitrogenation；
（2）Second segment reactor B is by the use of bamboo charcoal as the further denitrogenation of fixed bed carried microorganism；
（3）Raw water arranges water entry in two reactor respectively, carries out proportion switch according to raw water quality difference；
Described corn cob is the corn cob after being exposed to the sun, and is broken into the granule that particle diameter is 1-3cm by specification, is placed in reactor A
As solid carbon source and biofilm carrier, filling rate 100%；Described bamboo charcoal is the solid tablet that bamboo is fired, by rule
Lattice crush, sieve obtain the bamboo charcoal of 2mm-2cm after be put in clear water and soak, be placed in reactor B as fixed bed biologic packing material,
Filling rate 100%；
PH is passed through in described reactor B for 6-9, organic wastewaters of the C/N for 4-5, continuum micromeehanics mode biofilm, the finger in water outlet
Show that pollutant COD, nitrate nitrogen, ammonia nitrogen removal frank keep stable, biological load amount reaches 9-45g/L on filler, depending on biofilm success；
Described reactor A is connected with reactor B, and the sewage being passed through is characterized as nitrate nitrogen total measurement (volume) load 0.1-1.3kg/
(m3D), total hrt 0.5-3h；
Described hydraulic detention time is according to water inlet carbon-nitrogen ratio and nitrate nitrogen concentration so that Organic substance can keep optimal
Burst size, the demand that can either meet denitrification denitrogenation do not result in the rising of outlet water organic substance yet；When carbon-nitrogen ratio is less than or equal to
2.6, nitrate nitrogen concentration be less than or equal to 25mg/L when, the adjustment corn cob section time of staying be 1.6h, the bamboo charcoal section time of staying
0.3h, total denitrification percent is up to 82%；When carbon-nitrogen ratio is less than or equal to 2.6, and nitrate nitrogen concentration is more than 25mg/L, corn cob section is adjusted
The time of staying is 1.7h, bamboo charcoal section time of staying 1.3h, and total denitrification percent is up to 80%；When carbon-nitrogen ratio is more than 2.6, the concentration of nitrate nitrogen is little
When 25mg/L is equal to, corn cob section time of staying 1.1h, bamboo charcoal section time of staying 0.4h is adjusted, total denitrification percent is up to 80%.
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| CN106976968A (en) * | 2017-04-24 | 2017-07-25 | 浙江海洋大学 | A kind of simultaneous denitrification is except the solid phase denitrification coupling carrier of carbon |
| CN106986455A (en) * | 2017-05-23 | 2017-07-28 | 舟山风扬环保科技有限公司 | A kind of dystopy purifying of the hypertrophic water system method based on carrier organism membranous system |
| CN107601665A (en) * | 2017-10-31 | 2018-01-19 | 沈阳建筑大学 | A kind of removal device and method of sewage plant tail water total nitrogen |
| CN108795922A (en) * | 2018-05-24 | 2018-11-13 | 博元生态修复（北京）有限公司 | It is a kind of to be used to handle microbial immobilized microbial inoculum of high-nitrogen waste water and preparation method thereof |
| CN109607779A (en) * | 2019-02-21 | 2019-04-12 | 合肥工业大学 | A kind of method of anerobic sowage ammoxidation coupling solid phase denitrification efficient denitrification |
| CN114716017A (en) * | 2022-04-11 | 2022-07-08 | 北京科技大学 | Sewage denitrification method and system with corncobs as supplementary carbon sources |
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| CN103214106A (en) * | 2013-05-22 | 2013-07-24 | 南京林业大学 | Method for biologically degrading organic wastewater by utilizing microbe |
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| JPS558852A (en) * | 1978-07-04 | 1980-01-22 | Ebara Infilco Co Ltd | Controlling organic carbon source injection ratio in biological denitrification |
| CN103382047A (en) * | 2013-07-18 | 2013-11-06 | 马鞍山十七冶工程科技有限责任公司 | Bamboo charcoal packing membrane bioreaction sewage treatment method |
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Application publication date: 20150722 Assignee: SHANGHAI RESUN MACHINERY TECHNOLOGY COMPANY LIMITED Assignor: Nanjing Forestry University Contract record no.: 2018320000391 Denomination of invention: Method for deep denitriding of waste water in low carbon nitrogen ratio through denitrification Granted publication date: 20170315 License type: Common License Record date: 20181214 Application publication date: 20150722 Assignee: Ma'anshan Three Pagoda Environmental Protection Technology Co., Ltd. Assignor: Nanjing Forestry University Contract record no.: 2018320000390 Denomination of invention: Method for deep denitriding of waste water in low carbon nitrogen ratio through denitrification Granted publication date: 20170315 License type: Common License Record date: 20181214 |
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Application publication date: 20150722 Assignee: Nanjing Yonghe Environmental Protection Engineering CO., Ltd. Assignor: Nanjing Forestry University Contract record no.: X2019320000159 Denomination of invention: Method for deep denitriding of waste water in low carbon nitrogen ratio through denitrification Granted publication date: 20170315 License type: Common License Record date: 20191023 |
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