CN102718311B - Method for deeply treating wastewater containing ammonia nitrogen - Google Patents
Method for deeply treating wastewater containing ammonia nitrogen Download PDFInfo
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- CN102718311B CN102718311B CN201210232229.9A CN201210232229A CN102718311B CN 102718311 B CN102718311 B CN 102718311B CN 201210232229 A CN201210232229 A CN 201210232229A CN 102718311 B CN102718311 B CN 102718311B
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- ammonia nitrogen
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- nitrogen
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Water Treatment By Sorption (AREA)
Abstract
The invention discloses a method for deeply treating wastewater containing ammonia nitrogen. The method includes the following steps that zeolite and solid filter materials form a filter material layer based on a volume ratio of (1-2): (2-1) in a filter tank, biochemical secondary effluent containing the ammonia nitrogen or ammonia nitrogen wastewater containing low chemical oxygen demand (COD) is guided into the filter tank, nitrobacteria or activated sludge is added into the filter tank, a biochemical reaction is performed, and water body is discharged. The method for deeply treating the wastewater containing the ammonia nitrogen has the advantages that the capacity of resistance to ammonia nitrogen impact load is high, a continuous operation is achieved, the biological solid carrying capacity is large, the zeolite filter material can be efficiently bio-regenerated, and the ammonia nitrogen removing effect is stable and the like, and the method can be widely applied to the deep treatment of the wastewater containing ammonia nitrogen.
Description
Technical field
The invention belongs to field of Environment Protection, be specifically related to a kind of method of advanced treatment nitrogen-containing wastewater.
Background technology
Due to the development of industrial or agricultural, the sharp increase of population and urbanization, sanitary sewage and the trade effluent containing ammonia nitrogen is discharged into natural water body in a large number.The ammonia nitrogen being present in water has certain toxic action to human body and hydrobiont.Higher ammonia nitrogen concentration is except causing water quality black smelly, and it still causes the major reason of body eutrophication as a kind of inorganic nutrient substance.For waste water deaminizing, the biological ammonia nitrogen removal technique of traditional nitration denitrification is to adopt the biological ammonia nitrogen removal technique maximum, technology is the most ripe both at home and abroad.But these art breading influent ammonium concentrations are higher, or wastewater flow, and component and substrate concn constantly change, to fluctuate when larger, water outlet is difficult to stably reaching standard discharge.Seek a kind of efficient, shock-resistant, stable ammonia nitrogen removal method very necessary.
Zeolite, as a kind of natural ion exchange material, because it has stronger selective ion exchange ability to ammonia nitrogen, enjoys efforts at environmental protection person's concern.At present, Chinese scholars is removed ammonia nitrogen in waste water around zeolite and has been done a large amount of research work.
Wang Limin etc. (the 2010.1 journal > > of < < Institutes Of Technology Of Taiyuan clinoptilolites are removed ammonia nitrogen and regeneration research thereof in waste water) utilize using natural clinoptilolite to carry out adsorption treatment to Sewage Plant Ammonia-nitrogen In Secondary Effluent, adsorb saturatedly with NaCl solution, to carry out chemical regeneration afterwards.The removal of this Process on Ammonia Nitrogen has good effect, but life cycle is short, adsorbs after saturated and needs to carry out chemical regeneration, and ammonia nitrogen removal device cannot move continuously, chemical regeneration need add medicament, and cost is relatively high, regenerative operation is comparatively complicated, and regenerated liquid needs to process, and easily produces secondary pollution.
For the regeneration of the saturated rear zeolite of ammonia nitrogen absorption, except chemical regeneration method, scholar has proposed bio-regeneration method and has done large quantity research.Green etc. (2000.1. < < Water Science and Technology > > Ammonium removal from primary and secondary effluents using a bioregenerated ion-exchange process) using zeolite as the exchange filtrate of ammonia nitrogen removal coagulation and the second-stage treatment for sanitary sewage.Its technique adopting is: waste water first by zeolite filtration until ammonia nitrogen is revealed, then stop filtering, with nitrobacteria, zeolite is carried out to bio-regeneration, then starts the filtration in next cycle.When having overcome the saturated rear chemical regeneration of zeolite, this treatment process need add medicament, high and the regenerated liquid of regeneration cost produces secondary pollution problem, the special regeneration but this process operation needs after for some time to stop, and that has reduced equipment limitedly utilizes the time, and it is relatively slow to regenerate, regenerative operation management trouble.
Except utilizing zeolite first to adsorb rear reclaiming process, go to process nitrogenous effluent, scholar has also proposed at traditional denitrification process, such as A/O, adds zeolite powder and carry out enhanced biological nitrogen removal technique on A/A/O or SBR basis.This kind of method can tolerate the impact of ammonia nitrogen certain load, also can there is the nitrobacteria of q.s to carry out bio-regeneration to zeolite, but the zeolite powder of this technique can run off along with the discharge of excess sludge, be difficult to recycle, easily produce secondary pollution, for keeping better effects, need continuous Zeolite Addition powder.
And take the BAF that individual layer zeolite is filler, realized the object of zeolite ammonia nitrogen absorption and Zeolite-bio regeneration.But because zeolite has very strong water-absorbent, water can occupy rapidly zeolite cavity, the biomembranous adhesive ability on surface is reduced, the biofilm time is longer, and the biomass of supported quantity is limited; Microbial film periodically comes off and causes the unstable of system; The BAF that the individual layer zeolite of take is filler, later stage water outlet has stink and color is tending towards oyster white.
Summary of the invention
Goal of the invention: the object of the invention is to for the deficiencies in the prior art, a kind of method of advanced treatment nitrogen-containing wastewater is provided.
Technical scheme: in order to achieve the above object, the present invention is specifically achieved like this: a kind of method of advanced treatment nitrogen-containing wastewater, comprises the following steps:
(1) zeolite and solid filtrate are formed to filter material layer in 1 ~ 2:2 ~ 1 by volume in filtering basin;
(2) by the biochemical secondary effluent containing ammonia nitrogen or containing low COD ammonia nitrogen waste water, import filter tank;
(3) nitrobacteria or active sludge are dropped into filter tank, carry out biochemical reaction 12 ~ 48 hours;
(4) waste water through biochemical reaction is discharged.
Wherein, the diameter of described zeolite is 5 ~ 16mm.
Wherein, described solid filtrate is one or more mixing in granulated active carbon, volcano fitros, haydite, slag.
Wherein, described zeolite and the layering of solid filtrate are filled or are mixed filling.
Wherein, the described filter material layer number of plies is no less than 2 layers.
Wherein, the described filtrate first contacting with waste water is zeolite.
Wherein, in described step (2), containing the biochemical secondary effluent of ammonia nitrogen or contain low COD ammonia nitrogen waste water is that COD is 300 ~ 500, containing the waste water of ammonia nitrogen < 800mg/L.
Wherein, in described step (3), the add-on of nitrobacteria is more than or equal to 200m for working as filter tank
3, add-on is 20g/m
3; When filter tank is less than 200m
3, add-on is 40g/m
3.
Wherein, in described step (2), add be the biochemical secondary effluent containing ammonia nitrogen time do not need to add active sludge; What add is that while containing low COD ammonia nitrogen waste water, add-on is 3 of reaction tank volume ~ 5 ‰.
Beneficial effect: the present invention is on the basis of conventional BAF, by zeolite is mated to the improvement that combination, the optimization of filtrate filling mode and nitrobacteria are introduced immobilized three aspects: with other filtrates, a kind of advanced treatment process for waste water ammonia nitrogen removal of invention, it has overcome ammonia nitrogen removal device in conventional zeolite adsorption-chemical/biological reclaiming process and can not move continuously, and regenerative operation is comparatively complicated; Zeolite strengthened biological denitrification process mesolite powder runs off with excess sludge discharge, need constantly to supplement zeolite powder, and the individual layer Zeolite-bio aerating filter biofilm time is long, fixed biologically amount is limited, Zeolite-bio regeneration is relatively slow, microbial film poor adhesive force and periodically coming off causes the shortcomings such as system is unstable, there is anti-ammonia nitrogen impact load ability strong, operation continuously, biological supported quantity is large, zeolite filler high-performance bio regeneration, the features such as ammonia nitrogen removal effect stability, can be widely used in the advanced treatment of ammonia nitrogen waste water.
Embodiment
Embodiment 1:
By zeolite and volcano fitros by volume 1:2 at 300m
3filter tank in form filter material layer, zeolite diameter is 5 ~ 16mm, and cloth is filled out in zeolite and volcano fitros layering; Biochemical secondary effluent containing ammonia nitrogen is imported to filter tank; 6kg nitrobacteria is dropped into filter tank, carry out biochemical reaction 12 hours; Waste water through biochemical reaction is discharged.
Embodiment 2:
By zeolite and granulated active carbon by volume 1:1 at 150m
3filter tank in form filter material layer, zeolite diameter is 5 ~ 16mm, and zeolite mixes and fills out cloth with granulated active carbon; To import filter tank containing low COD ammonia nitrogen waste water; By 6kg nitrobacteria and 0.45m
3active sludge drop into filter tank, carry out biochemical reaction 24 hours; Waste water through biochemical reaction is discharged.
Embodiment 3:
By zeolite and haydite by volume 2:1 at 400m
3filter tank in form filter material layer, zeolite diameter is 5 ~ 16mm, and zeolite mixes and fills out cloth with haydite; Biochemical secondary effluent containing ammonia nitrogen is imported to filter tank; 8kg nitrobacteria is dropped into filter tank, carry out biochemical reaction 36 hours; Waste water through biochemical reaction is discharged.
Embodiment 4:
By zeolite, slag and haydite mixture by volume 1:1 at 100m
3filter tank in form filter material layer, zeolite diameter is 5 ~ 16mm, and zeolite, slag and haydite demixing are filled out cloth; To import filter tank containing low COD ammonia nitrogen waste water; By 4kg nitrobacteria and 0.5m
3active sludge drop into filter tank, carry out biochemical reaction 48 hours; Waste water through biochemical reaction is discharged.
Claims (6)
1. a method for advanced treatment nitrogen-containing wastewater, is characterized in that, comprises the following steps:
(1) zeolite and solid filtrate are formed to filter material layer in 1～2:2～1 by volume in filtering basin;
(2) by the biochemical secondary effluent containing ammonia nitrogen or containing low COD ammonia nitrogen waste water, import filter tank;
(3) nitrobacteria or active sludge are dropped into filter tank, carry out biochemical reaction 12～48 hours;
(4) waste water through biochemical reaction is discharged;
Wherein in step (2), containing the biochemical secondary effluent of ammonia nitrogen or containing low COD ammonia nitrogen waste water is that COD is 300～500, containing the waste water of ammonia nitrogen < 800mg/L; In described step (2), add be the biochemical secondary effluent containing ammonia nitrogen time do not need to add active sludge; What add is that while containing low COD ammonia nitrogen waste water, add-on is 3 of reaction tank volume～5 ‰; In described step (3), the add-on of nitrobacteria is for being more than or equal to 200m when filter tank
3, add-on is 20g/m
3; When filter tank is less than 200m
3, add-on is 40g/m
3.
2. the method for advanced treatment nitrogen-containing wastewater according to claim 1, is characterized in that, the diameter of described zeolite is 5～16mm.
3. the method for advanced treatment nitrogen-containing wastewater according to claim 1, is characterized in that, described solid filtrate is one or more mixing in granulated active carbon, volcano fitros, haydite, slag.
4. according to the method for the advanced treatment nitrogen-containing wastewater described in claim 1 or 3, it is characterized in that, described zeolite is with solid filtrate layering filling or mix filling.
5. the method for advanced treatment nitrogen-containing wastewater according to claim 1, is characterized in that, the described filter material layer number of plies is no less than 2 layers.
6. the method for advanced treatment nitrogen-containing wastewater according to claim 1, is characterized in that, the described filtrate first contacting with waste water is zeolite.
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| CN201210232229.9A CN102718311B (en) | 2012-07-06 | 2012-07-06 | Method for deeply treating wastewater containing ammonia nitrogen |
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|---|---|---|---|
| CN201210232229.9A CN102718311B (en) | 2012-07-06 | 2012-07-06 | Method for deeply treating wastewater containing ammonia nitrogen |
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| CN102718311A CN102718311A (en) | 2012-10-10 |
| CN102718311B true CN102718311B (en) | 2014-08-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103081836A (en) * | 2013-02-06 | 2013-05-08 | 大连海洋大学 | Aquatic offspring seed intermediate cultivating system |
| CN105084682B (en) * | 2015-10-08 | 2017-08-25 | 南京大学 | A kind of method of NH_3-N treating efficiency in raising waste water |
| CN105236564B (en) * | 2015-10-30 | 2018-03-23 | 陕西科技大学 | A kind of BAF combined stuffing and application |
| CN106186579A (en) * | 2016-08-30 | 2016-12-07 | 西安西热水务环保有限公司 | A kind of zeolite-activated carbon composite filtering material tandem biological filter as water treating system and process technique |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1369440A (en) * | 2002-03-22 | 2002-09-18 | 清华大学 | Process for treating sewage with zeolite filler in aerated biologic filter pool and zeolite filler |
| CN102249402A (en) * | 2011-04-27 | 2011-11-23 | 合肥工业大学 | Low-density zeolite biological aerated filter filling and preparation method thereof |
| CN102311253A (en) * | 2011-05-23 | 2012-01-11 | 合肥工业大学 | Synchronous denitrification and dephosphorization bio-filter packing and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1369440A (en) * | 2002-03-22 | 2002-09-18 | 清华大学 | Process for treating sewage with zeolite filler in aerated biologic filter pool and zeolite filler |
| CN102249402A (en) * | 2011-04-27 | 2011-11-23 | 合肥工业大学 | Low-density zeolite biological aerated filter filling and preparation method thereof |
| CN102311253A (en) * | 2011-05-23 | 2012-01-11 | 合肥工业大学 | Synchronous denitrification and dephosphorization bio-filter packing and preparation method thereof |
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