CN1151085C - Process for treating sewage with zeolite filler in aerated biologic filter pool and zeolite filler - Google Patents
Process for treating sewage with zeolite filler in aerated biologic filter pool and zeolite fillerInfo
- Publication number
- CN1151085C CN1151085C CNB021163073A CN02116307A CN1151085C CN 1151085 C CN1151085 C CN 1151085C CN B021163073 A CNB021163073 A CN B021163073A CN 02116307 A CN02116307 A CN 02116307A CN 1151085 C CN1151085 C CN 1151085C
- Authority
- CN
- China
- Prior art keywords
- water
- sewage
- ammonia nitrogen
- zeolite
- backwash
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- 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
Landscapes
- Water Treatment By Sorption (AREA)
- Treatment Of Water By Ion Exchange (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The present invention discloses a method for treating domestic sewage by using a zeolite filter material in an aeration biologic filter pool and a zeolite filter material, which relates to reuse of low concentration domestic sewage and a domestic sewage advanced treatment technique. The present invention is characterized in that when COD of the domestic sewage in a sewage treatment process is from 40 mg/L to 120 mg/L, and the ammonia nitrogen is from 10 mg/L to 40 mg/L, the water-gas ratio is 1: 1-1: 3, the height of the filter material is from 2m to 4m, and the hydraulic load is from 2 m/h to 5 m/h; the gas flush strength of the gas-water combined backflushing process is from 12 L/m<2>s to 18 L/m<2>s, the water flush strength is from 8 L/m<2>s to 12 L/m<2>s, and the water rinsing strength is from 8 L/m<2>s to 12 L/m<2>s. The grain size of the zeolite filter material used in the method is from 3mm to 6mm, the density is from 1900 kg/m<3> to 2200 kg/m<3>, the hardness is the mohs hardness from 3 to 5, and the ammonia ion exchange capacity is from 3 kg/m<3> to 6 kg/m<3>. The method has good effects of removing suspended matters, COD and ammonia nitrogen, has high capability of resisting the shock load of the ammonia nitrogen and has less invest and low operation cost.
Description
Technical field
The present invention relates to a kind of low concentration sewage Treatment for Reuse and treatment of domestic sewage advanced technology, relate in particular to a kind of method for the treatment of sewage with zeolite filler in aerated biologic filter pool.
Background technology
The Treatment for Reuse of low concentration sewage lacks the method that is fit at present.If adopt biological treatments such as activated sludge process and biological contact oxidation process, make processing efficiency lower because organic loading is low, and also need the second pond precipitation, therefore processing cost is higher, remove the ammonia nitrogen weak effect in addition, water outlet is difficult to reach the requirement of reusing sewage as the circulating cooling water quality standard.If adopt physicochemical techniques such as coagulation, precipitation, filtration, can't remove ammonia nitrogen, the sludge quantity of generation and be not easy to handle, running cost is very high.
The technology ubiquity floor space that adopts at present in the city sewage deep treatment is big, handles shortcomings such as load is low.And, the fluctuation of concentration of ammonia nitrogen is bigger in the city domestic sewage, according to statistics, the ammonia nitrogen concentration maximum load has only 2～3 hours every day, for the impact load that solves in this short period of time need increase design capacity, not only increase equipment volume and floor space, and easily caused equipment under optimum condition, not move, influenced treatment effect.
BAF (BAF) is the sewage treatment process that rises at the end of the eighties and the beginning of the nineties, at first as tertiary treatment, after develop into and be directly used in second-stage treatment.It uses the particulate filter of rough porous, and the filter material surface growth has microbial film, and aeration is provided at the bottom of the pond, and during the effluent stream filter bed, pollutent at first is filtered and adsorbs, and then is decomposed by the microbiological oxidation of filter material surface.Its maximum characteristics are to integrate bio-oxidation and hold back suspended substance, have saved the post precipitation pond, and it is big to have a volumetric loading, and hydraulic detention time is short, and initial cost is few, the effluent quality advantages of higher.
Filtrate is very big to one-time investment, running cost and the normal running influence of BAF, mainly considers specific surface area, physical strength, density, physical and chemical stability, particle diameter and shape, porosity and film formation property etc. during selection.In addition, cheap, wide material sources also are the important factors that needs consideration.At present most widely used is spherical leca and irregular haydites of book structure.
Zeolite (Zeolite) is a kind of widely distributed and natural ion exchange material that produced quantity is very high.That the output maximum is clinoptilolite (Clinoptilolite) in the natural zeolite, it has porosity height, characteristics that specific surface area is big, it has very strong selectivity ion-exchange capacity to ammonia nitrogen in addition, be usually used in the chemical treatment of sewage removal of ammonia and nitrogen, but the report of also not disposing of sewage as the BAF filtrate with it at present at home.
External similar techniques has following several:
(1) Ri Ben people such as Tsuno adopted zeolite to test as the filtrate of biological filter in 1994, he finds that the absorption of ammonia nitrogen and biological nitration take place simultaneously, when the load of ammonia nitrogen surpasses the load that nitrification can remove, the absorption of ammonia nitrogen will be suppressed, but can the ammonia nitrogen that discharge after the absorption is nitrated after the nitrifier on the filtrate is fully grown, at this moment the loading capacity of zeolite obtains regeneration (Tsuno, Hiroshi Nishimura, Fumitake et.al.Removalof ammonium nitrogen in bio-zeolite reactor.In:Proceedings of the Japan Societyof Civil Engineers.Japan Soc of Civil Engineers, 1994.159-166) but the author has only adopted general biological filter, do not adopt BAF, die except that ammonia nitrogen loading limited in one's ability.(2) De Guo Oldenburg, Martin and Sekoulov, Ivan. have delivered in nineteen ninety-five zeolite and other filtrate have been mixed as the BAF filtrate, utilize the ion exchange of zeolite to remove the test-results of ammonia nitrogen impact load in the sewage.Find when ammonia nitrogen concentration is higher in the water inlet, but zeolite enrichment ammonia nitrogen; When influent ammonium concentration reduces, ammonia nitrogen desorbs from zeolite, removed (Oldenburg by the nitrobacteria on other filtrate by nitrification, Martin, Sekoulov, Ivan.Multipurpose filters with ion-exchanger for the equalization of ammoniapeaks.Water Science and Technology, 1995,32 (7): 199-206).This technology has been utilized two kinds of filtrates, certainly will produce filtrate owing to the different backwash lamination problems that cause with particle diameter of density, underuses the ion-exchange capacity of zeolite in addition.(3) Gisvold of Norway, people such as B. have delivered in 1999 and have used the expanded ceramsite that contains zeolite powder to remove the test-results of ammonia nitrogen impact load as nitrated filter tank filtrate (Filtralite ZL).This filter tank utilizes acting in conjunction nitrated and absorption to remove ammonia nitrogen in the sanitary sewage, the filter tank constantly obtains regeneration by biological action, move after ten months performance and still do not reduce (Gisvold, B., Odegaard, H., Follesdal, M..Enhanced removal ofammonium by combined nitrification/adsorption in expanded clay aggregate filters.Water Science and Technology, 1999,41 (4): 409-416).The shortcoming of this technology is that the expanded ceramsite that contains zeolite powder needs high temperature sintering, has increased cost.(4) Lahav of Israel, O. and Green, M.. have delivered in 2000 that the one-level that is used for sanitary sewage as the filtrate of BAF with zeolite is handled and the test-results of second-stage treatment.The technology that adopts is: waste water leaks up to ammonia nitrogen by zeolite filtration earlier, stop then filtering, with nitrifier zeolite is carried out bio-regeneration, begin the filtration (Lahav in next cycle again, O., Green, M..Ammonium removal from primaryand secondary effluents using a bioregenerated ion-exchange process.Water Scienceand Technology, 2000,42 (1): 179-185).The shortcoming of this method is the special regeneration of will stopping after operation for some time, has reduced the operational use time of equipment.
Summary of the invention
The method of the treating sewage with zeolite filler in aerated biologic filter pool that the object of the present invention is to provide that a kind of anti-ammonia nitrogen impact load ability is strong, facility investment and working cost is low.
For achieving the above object, the method of a kind for the treatment of sewage with zeolite filler in aerated biologic filter pool that the present invention proposes, contain sewage treatment process and air water associating backwash technique, it is characterized in that: the chemical oxygen demand COD of sewage is (40～120) mg/L in the described sewage treatment process, when ammonia nitrogen is (10～40) mg/L, water-gas ratio is 1: 1～1: 3, and the filtrate height is at 2～4m, and hydraulic load is (2～5) m/h; Described combined water and air backwash technology fs gas flushing intensity (12～18) L/m
2S, subordinate phase gas flushing intensity (12～18) L/m
2S, water backwash rate are (8～12) L/m
2S, phase III water rinse intensity is (8～12) L/m
2S; Described BAF mainly is made up of porous plate water inlet distribution device (6), supporting layer (7), zeolite filler layer (1), technology aerating apparatus (2), back flushing air distribution device (3); Sewage enters from water-in (11) during operation, by water inlet distribution device (3), passes supporting layer (7), removes suspended substance, COD, BOD through zeolite filler layer (1)
5Behind ammonia nitrogen, discharge from water outlet (8), pressurized air is entered by (4) simultaneously, by (2) aeration, for microorganism growth provides oxygen; Pressurized air enters from gas inlet (5) during backwash, and clear water enters from backwash water-in (10), and backwash water is discharged by water port (9); Equipment is continuously operation, after the filter tank head loss reaches 1.5m, unites with pressurized air and water outlet and to carry out back flushing, and back flushing can put into operation after going out clarification of water; Described zeolite filler is the using natural clinoptilolite filtrate, and its effective size of grain is (3～6) mm, and density is (1900～2200) kg/m
3, hardness is Mohs' hardness 3～5, the ammonium ion exchange capacity is (3～6) kg/m
3
Utilize the method for a kind for the treatment of sewage with zeolite filler in aerated biologic filter pool that the present invention proposes to handle low concentration sewage after precipitation is removed most suspended substances, can direct access arrangement, water outlet gets final product reuse after through sterilization, does not need secondary sedimentation; When being used for treatment of domestic sewage advanced, secondary effluent directly access arrangement is removed remaining COD and NH
4 +-N.The easy biofilm of present method is removed the effective of suspended substance, COD and ammonia nitrogen, and anti-ammonia nitrogen impact load ability is strong, can reduce the filter tank volume, reduces the filter tank cost, makes equipment operate in optimum operating condition, and facility investment and working cost are low.In addition, use the zeolite better economy, and zeolite filler is easy to process, ample supply and prompt delivery help protecting environment.
Description of drawings
A kind of zeolite filler in aerated biologic filter pool structural representation that Fig. 1 adopts for the present invention.
Embodiment
Specify the method and the zeolite filler of a kind for the treatment of sewage with zeolite filler in aerated biologic filter pool that the present invention relates to below in conjunction with accompanying drawing.
Up-flow Biological Aerated Filter of the present invention mainly is made up of porous plate water inlet distribution device 6, supporting layer 7, zeolite filler layer 1, technology aerating apparatus 2, back flushing air distribution device 3.Sewage enters from water-in 11 during operation, by water inlet distribution device 3, passes supporting layer 7, removes suspended substance, COD, BOD through zeolite filler layer 1
5Behind ammonia nitrogen, discharge from water outlet 8, pressurized air enters by 4 simultaneously, by 2 aerations, for microorganism growth provides oxygen; Pressurized air enters from gas inlet 5 during backwash, and clear water enters from backwash water-in 10, and backwash water is discharged by water port 9.Equipment is continuously operation, (is generally about 1.5m) to unite with pressurized air and water outlet after the filter tank head loss reach a certain height to carry out back flushing, and back flushing can put into operation after going out clarification of water.This technology also can adopt down to the stream operation scheme.
The present invention with using natural clinoptilolite as the BAF filtrate, natural zeolite surface irregularity porous, it is the irregular aperture of 20～30 μ m that a lot of diameters are arranged, size greater than bacterium, the surface has positive charge simultaneously, and the opposite charge with bacterium is beneficial to bacterial adhesion, therefore zeolite filler BAF has filtration, biological absorption and bio-oxidation function, can remove suspended substance, chemical oxygen demand COD, biochemical oxygen demand (BOD) BOD
5With pollutents such as ammonia nitrogens.(the selection exchange sequence to common ion is: K but because clinoptilolite has very strong selectivity exchange capacity to ammonia nitrogen
+＞NH
4 +＞Na
+＞Ca
2+＞Fe
3+＞Al
3+＞Mg
2+＞Li
+), when therefore ammonia nitrogen concentration is higher in intaking, but zeolite enrichment ammonia nitrogen, when influent ammonium concentration reduced, ammonia nitrogen can be by Na
+Exchanges from zeolite Deng positively charged ion, removed by nitrification, so zeolite filler BAF has the ability of very strong anti-ammonia nitrogen impact load by the nitrobacteria on the filtrate, this be zeolite beds BAF exclusive characteristics.
The using natural clinoptilolite filtrate effective size of grain that the present invention selects for use is (3～6) mm, and density is (1900～2200) kg/m
3, hardness is Mohs' hardness 3～5, the ammonium ion exchange capacity is (3～6) kg/m
3According to water inlet COD and NH
4 +The concentration of-N and effluent quality require to determine the particle diameter of filtrate and load height that it highly is 2～4m that filtrate is loaded.Low concentration sewage after preliminary sedimentation is removed most suspended substances, direct access arrangement just, water outlet gets final product reuse after passing through and sterilizing, and does not need secondary sedimentation; Secondary effluent directly access arrangement is removed remaining COD and NH
4 +-N.
This processing method can reach following technique effect:
(1) removes the effective of suspended substance, COD and ammonia nitrogen.When zeolite filler in aerated biologic filter pool was handled low concentration sewage, the heterotrophism district separated with nitrification zone, and heterotrophic bacterium is not obvious to the nitrobacteria restraining effect.In addition, zeolite filler after the biofilm has good filteration, therefore in a zeolite filler in aerated biologic filter pool, can remove suspended substance, COD and ammonia nitrogen simultaneously, effluent quality can reach reclaimed water or reusing sewage as relevant suspended substance, COD, BOD in the circulating cooling water of power plant
5Water quality standard with ammonia nitrogen.Suspended substance is 10～30mg/L in water inlet, COD is 80～120mg/L, when ammonia nitrogen is 7～15mg/L, water-gas ratio is 1: 2～1: 3, the filtrate height is at 3m, and hydraulic load is 2m/h～4m/h, and the suspended substance removal rate is about about 90%, the COD clearance is about about 80%, and ammonia-N removal rate is 80～90%.
(2) anti-ammonia nitrogen impact load ability is strong.Can reduce the volume in filter tank like this, reduce the cost in filter tank, make equipment operate in optimum operating condition.Filtering velocity 4m/h, the residence time is 40min, and influent ammonium concentration is increased to 20mg/L by 10mg/L and kept 2 hours, and outlet ammonia nitrogen concentration maximum is no more than 3mg/L.
(3) easy biofilm.Because using natural clinoptilolite is a kind of particulate filter of rough porous, and has very big specific surface area, and the surface is positively charged, and therefore pore diameter is beneficial to microorganic adhesion greater than bacterium-sized, and biofilm is easy, and microbial film difficult drop-off during backwash.Adopt inoculation membrane formation, 10 days left and right sides heterotrophic bacterium biofilm maturations, the 20 days left and right sides nitrifier biofilm maturations during 20～30 ℃ of temperature.
(4) facility investment and working cost are low.The zeolite filler price is about 300 yuan/m
3, and the price of leca is about 1200 yuan/m
3About, the price of zeolite only is about 1/4 of a haydite, therefore use the zeolite better economy, and zeolite filler is easy to process, ample supply and prompt delivery help protecting environment.
Embodiment 1:
The processing of low concentration sewage: the selection particle diameter is 4～6mm, and density is (1900～2100) kg/m
3, hardness is Mohs' hardness 4～5, the ammonium ion exchange capacity is (3～4) kg/m
3COD is (80～120) mg/L in the sewage, and when ammonia nitrogen was (10～15) mg/L, water-gas ratio was 1: 2～1: 3, and the filtrate height is at (2～3) m, and hydraulic load is (2～4) m/h; This process using combined water and air backwash mode, fs gas flushing intensity (15～18) L/ (m
2S), flush time (3～7) min; Subordinate phase gas flushing intensity (15～18) L/ (m
2S), the water backwash rate is (10～12) L/ (m
2S), flush time (10～15) min; Phase III water rinse intensity is (10～12) L/ (m
2S), time (5～10) min.The suspended substance removal rate is about about 90%, and the COD clearance is about about 80%, and ammonia-N removal rate is 80～90%.
Embodiment 2:
The advanced treatment of sanitary sewage: selecting particle diameter is (3～4) mm, and density is (2000～2200) kg/m
3, hardness is Mohs' hardness 3～4, the ammonium ion exchange capacity is (5～6) kg/m
3COD is (40～90) mg/L in the sewage, and when ammonia nitrogen was (15～40) mg/L, water-gas ratio was 1: 1～1: 2, and hydraulic load is (4～6) m/h, and the filtrate height is at (2～4) m.This process using combined water and air backwash mode, fs gas flushing intensity (12～15) L/ (m
2S), flush time (3～7) min; Subordinate phase gas flushing intensity (12～15) L/ (m
2S), the water backwash rate is (8～10) L/ (m
2S), flush time (10～20) min; Phase III water rinse intensity is (8～10) L/ (m
2S), time (5～10) min.The suspended substance removal rate is about about 90%, and the COD clearance is about about 70～80%, and ammonia-N removal rate is 90%.
Claims (1)
1, a kind of method for the treatment of sewage with zeolite filler in aerated biologic filter pool, contain sewage treatment process and air water associating backwash technique, it is characterized in that: the chemical oxygen demand COD of sewage is (40～120) mg/L in the described sewage treatment process, when ammonia nitrogen is (10～40) mg/L, water-gas ratio is 1: 1～1: 3, the filtrate height is at 2～4m, and hydraulic load is (2～5) m/h; Described combined water and air backwash technology fs gas flushing intensity (12～18) L/m
2S, subordinate phase gas flushing intensity (12～18) L/m
2S, water backwash rate are (8～12) L/m
2S, phase III water rinse intensity is (8～12) L/m
2S; Described BAF mainly is made up of porous plate water inlet distribution device (6), supporting layer (7), zeolite filler layer (1), technology aerating apparatus (2), back flushing air distribution device (3); Sewage enters from water-in (11) during operation, by water inlet distribution device (3), passes supporting layer (7), removes suspended substance, COD, BOD through zeolite filler layer (1)
5Behind ammonia nitrogen, discharge from water outlet (8), pressurized air is entered by (4) simultaneously, by (2) aeration, for microorganism growth provides oxygen; Pressurized air enters from gas inlet (5) during backwash, and clear water enters from backwash water-in (10), and backwash water is discharged by water port (9); Equipment is continuously operation, after the filter tank head loss reaches 1.5m, unites with pressurized air and water outlet and to carry out back flushing, and back flushing can put into operation after going out clarification of water; Described zeolite filler is the using natural clinoptilolite filtrate, and its effective size of grain is (3～6) mm, and density is (1900～2200) kg/m
3, hardness is Mohs' hardness 3～5, the ammonium ion exchange capacity is (3～6) kg/m
3
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021163073A CN1151085C (en) | 2002-03-22 | 2002-03-22 | Process for treating sewage with zeolite filler in aerated biologic filter pool and zeolite filler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021163073A CN1151085C (en) | 2002-03-22 | 2002-03-22 | Process for treating sewage with zeolite filler in aerated biologic filter pool and zeolite filler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1369440A CN1369440A (en) | 2002-09-18 |
| CN1151085C true CN1151085C (en) | 2004-05-26 |
Family
ID=4744067
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021163073A Expired - Fee Related CN1151085C (en) | 2002-03-22 | 2002-03-22 | Process for treating sewage with zeolite filler in aerated biologic filter pool and zeolite filler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101948164A (en) * | 2010-09-13 | 2011-01-19 | 中国水产科学研究院黄海水产研究所 | Biological membrane quick-constructing method used in seawater factory breeding cycle water purification system |
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|---|---|---|---|---|
| CN1328190C (en) * | 2005-03-23 | 2007-07-25 | 安徽工业大学 | Biological purifying process of seriously polluted river water |
| CN1312063C (en) * | 2005-03-28 | 2007-04-25 | 哈尔滨工业大学 | Method for removing ammonia nitrogen from sewage in subzone |
| CN101774687A (en) * | 2010-03-19 | 2010-07-14 | 哈尔滨工业大学 | Method for treating water of polluted water source by using double-stage aeration bio-filter |
| CN102001785B (en) * | 2010-10-19 | 2012-09-05 | 天津市环境保护科学研究院 | Compound biological film integrated reactor for treatment of domestic sewage and application method |
| CN102502972B (en) * | 2011-11-01 | 2013-08-14 | 常州大学 | Method using downflow biological aerated filter to treat algal slurry press filtrate |
| CN102718311B (en) * | 2012-07-06 | 2014-08-20 | 江苏蓝星环保科技有限公司 | Method for deeply treating wastewater containing ammonia nitrogen |
| CN102874924A (en) * | 2012-08-31 | 2013-01-16 | 惠州市新明水务工程有限公司 | Novel ammonia nitrogen biotreatment device |
| CN106082428A (en) * | 2016-08-18 | 2016-11-09 | 环境保护部南京环境科学研究所 | A kind of with the alkali leaching excess sludge BAF system as filler and operation method thereof with filler preparation method |
| CN108545793A (en) * | 2018-05-07 | 2018-09-18 | 清华大学深圳研究生院 | A kind of filtrate for handling the suspension rapid filter of closure option |
| CN113044963A (en) * | 2021-03-15 | 2021-06-29 | 广东昂为环保产业有限公司 | Active biological filter material and preparation method and application thereof |
-
2002
- 2002-03-22 CN CNB021163073A patent/CN1151085C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101948164A (en) * | 2010-09-13 | 2011-01-19 | 中国水产科学研究院黄海水产研究所 | Biological membrane quick-constructing method used in seawater factory breeding cycle water purification system |
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|---|---|
| CN1369440A (en) | 2002-09-18 |
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