CN105314733A - Anaerobic ammonia oxidation reactor capable of relieving floating of granule sludge - Google Patents
Anaerobic ammonia oxidation reactor capable of relieving floating of granule sludge Download PDFInfo
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Abstract
The invention discloses an anaerobic ammonia oxidation reactor capable of relieving floating of granule sludge. A rising flow reaction chamber is arranged at the lower portion of the reactor. A settling chamber is arranged at the upper portion of the reactor and comprises a buffering gas releasing area, a center settling area and a water outlet overflowing area. The top of the settling chamber is provided with a calcium salt solution drainage tube. A closure baffle is arranged on the top of the rising flow reaction chamber. The upper portion of the closure baffle is provided with a flow guiding partition plate parallel to the closure baffle. A flow guiding area is formed between the closure baffle and the flow guiding partition plate. The top end of a circulation pipe is guided out from the flow guiding area, and the bottom end stretches into the rising flow reaction chamber. The upper portion of the flow guiding partition plate is connected with a buffering gas releasing baffle. The water outlet overflowing area and the center settling area are partitioned through an inclined flow guiding baffle. According to the anaerobic ammonia oxidation reactor, the gas producing effect and the Venturi effect of the high-load anaerobic ammonia oxidation reactor are sufficiently utilized, reinforced calcium salt sediments are attached to anaerobic ammonia oxidation granule floating sludge, the granule sludge is returned back to the reaction area, and therefore the biomass of the reaction area is increased and the anaerobic ammonia oxidation denitrification performance of the reactor is improved finally.
Description
Technical field
The present invention relates to wastewater biological denitrificaion technical field, particularly a kind of anaerobic ammonia oxidation reactor of effective alleviation granule sludge floating.
Background technology
Nearly ten years, a large amount of discharges of ammonia nitrogen waste water cause serious environmental pollution.Ammonia nitrogen enters water body, can make lake eutrophication, causes the alga eruption such as blue-green algae, green alga, exhausts the dissolved oxygen in water body, and make aquatic animals and plants dead, aquatic ecosystem is seriously damaged.Meanwhile, ammonia nitrogen enters in water body, can generate multiple toxic substance, serious harm water quality safety with other substance reactions in water.Country has put into effect series of measures, system, is intended to control water body ammonia and nitrogen pollution.Wherein, in " 12 " planning, ammonia nitrogen is classified as restrictive Con trolling index, becomes second restrictive Con trolling index in water pollution control after chemical oxygen demand (COD) (COD).Waste water nitrate pollution controls to be the great environmental protection subject realizing national environmental protection target and ensure social sustainable development.
Conventional denitrogenation of waste water method has blow-off method, the precipitator method, absorption method and break point chlorination etc., but has that energy consumption is high, secondary pollution serious and the shortcoming such as operation inconvenience, is difficult to large-scale promotion application.It is not high then to there is denitrification rates in traditional bio-denitrification technology, and oxygen requirement is large and need additional organism to provide the deficiencies such as electron donor.Anammox can be electron acceptor(EA) under anoxic conditions with nitrite is nitrogen by ammonia direct oxidation, this process, without the need to adding organism and aeration, thus can greatly reduce energy consumption and working cost, and excess sludge production is few, volume usefulness is high, and its volume nitrogen elimination capacity can reach 77kg/ (m
3d), greatly can reduce the floor space of cost for wastewater treatment and minimizing reactor, thus be acknowledged as the denitrogenation of waste water technology of the characteristic of most Sustainable development so far.Obtain application in fields such as sludge press filtration liquid, percolate, gourmet powder waste water, pharmacy waste waters at present, show good application potential.
In the operational process of anaerobic ammonia oxidation reactor, along with the lifting of nitrogen volumetric loading, nitrogen generation increases gradually, the granule sludge of bubbling through the water column progressively is there is in reactor, and it is cumulative, these granularities are comparatively large, present bright red, and find to be adsorbed with bubble on granule sludge surface.In addition, further investigation also finds, anaerobic ammonium oxidation granular sludge is inner exists exhaust-duct with Sludge Surface, and the nitrogen produced under normal circumstances discharges granule sludge inside by this passage, be unlikely to reduce the density of granule sludge, thus granule sludge can normally sedimentation; But the exhaust of some mud, by often blocked, causes gas effectively cannot discharge and be embedded in granule sludge inside, makes the density of mud be less than water and float.During Mud up-floating, granule sludge is bubbled through the water column, and function yeast does not wherein participate in denitrification reaction substantially, thus reduces the effective biomass in reactor, causes the denitrification efficiency of reactor not good.Meanwhile, a large amount of mud scum is bubbled through the water column, and can block outlet conduit time serious, causes reactor normally to run.
Calcium salt precipitation method is a kind of method effectively can alleviated granule sludge in anaerobic ammonia oxidation reactor operational process and float, by adding calcium salt, phosphoric acid salt or carbonate etc. to orientation in reactor, and can generating portion calcium precipitation; Because anaerobic ammonium oxidation granular sludge surface has abundant Extracellular polymers and organo-functional group etc., the calcium precipitation generated is attached on granule sludge by the bonding of these mud, adsorption, thus increase its density, improve the settling property of mud, significantly improve the nitrogen removal performance of anaerobic ammonia oxidation reactor.
Based on above thinking, the present invention is based on internal recycle theory and Venturi effect, designed by structure of reactor, particle mud scum is come together in buffering outgas district, and calcium salt soln throwing device is set, strengthening calcium precipitation is effectively attached on particle mud scum, makes particle mud scum return to reaction zone eventually through gravity settling and internal recycle, improve the biomass of reaction zone, and then improve the nitrogen removal performance of reactor.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of anaerobic ammonia oxidation reactor alleviated granule sludge and float is provided.
In order to realize above-mentioned technical purpose, technical scheme of the present invention is,
A kind of anaerobic ammonia oxidation reactor alleviated granule sludge and float, comprise reactor body and the circulation tube of hollow, reactor body bottom is connected with up-flow reaction chamber, the bottom of up-flow reaction chamber is provided with water inlet pipe, reactor body top is provided with settling chamber, settling chamber comprises the buffering outgas district be arranged in parallel, CD district and water outlet flooded zonevvv, settling chamber's outer wall is provided with rising pipe, water outlet flooded zonevvv is provided with vertical over-pass, the bottom of over-pass connects rising pipe, top, settling chamber is provided with effuser and calcium salt soln stream feeder apparatus, up-flow reaction chamber is connected with settling chamber by up big and down small increaser, up-flow reactor top is provided with shut-off damper, shut-off damper top is provided with diaphragm parallel with it, guiding region is formed between shut-off damper and diaphragm, circulation tube top leads to reactor body in guiding region, it is inner that up-flow reaction chamber is stretched in bottom, the buffering outgas baffle plate that diaphragm top vertical connecting is arranged, water outlet flooded zonevvv and CD district are separated by the distributing damper that tilts.
Described a kind of anaerobic ammonia oxidation reactor alleviated granule sludge and float, described shut-off damper is positioned at up-flow reactor top, the cross-sectional area of comprehensive covering up-flow reaction chamber, and the area of shut-off damper is 1:0.3 ~ 0.7 with the ratio of the cross-sectional area of up-flow reaction chamber, retaining the sectional area that baffle plate and increaser inwall form narrow and small outlet is 1:2 ~ 5 with the ratio of buffering outgas district sectional area.
Described a kind of anaerobic ammonia oxidation reactor alleviated granule sludge and float, described diaphragm is vesicular dividing plate, and the hole diameter on dividing plate is 2 ~ 5mm, and on dividing plate, the total area of aperture is 1:1.3 ~ 3 with the ratio of the diaphragm total area.
Described a kind of anaerobic ammonia oxidation reactor alleviated granule sludge and float, up-flow reaction chamber central zone is stretched in the bottom of described circulation tube in the middle part of up-flow reaction chamber, the angle β that circulation tube bottom end outlet cross section and up-flow reaction chamber medullary ray are formed is 5 ~ 15 °, and circulation tube is 1:8 ~ 15 with the ratio of the cross-sectional area of up-flow reaction chamber.
Described a kind of anaerobic ammonia oxidation reactor alleviated granule sludge and float, the volume ratio of the buffering outgas district in described settling chamber, CD district and water outlet flooded zonevvv is 1:1 ~ 1.5:0.8 ~ 1.2.
Described a kind of anaerobic ammonia oxidation reactor alleviated granule sludge and float, the cross-sectional area of described guiding region is 1:2 ~ 5 with the ratio of buffering outgas district cross-sectional area, is 1:0.2 ~ 0.5 with the cross-sectional area ratio of circulation tube.
Described a kind of anaerobic ammonia oxidation reactor alleviated granule sludge and float, described inclination distributing damper is positioned at settling chamber and separates center sedimentation district and water outlet flooded zonevvv, the length that top exceeds the water surface accounts for 8 ~ 15% of its length total, the cross-sectional area of the slit that inclination distributing damper bottom is formed with increaser inwall is 1:20 ~ 40 with the ratio of settling chamber's cross-sectional area, the angle α formed with the water surface is 70 ~ 80 °, and inclination distributing damper bottom and diaphragm bottom distance l in the horizontal plane and settling chamber's diameter ratio are 1:15 ~ 30.
Described a kind of anaerobic ammonia oxidation reactor alleviated granule sludge and float, described calcium salt soln stream feeder apparatus is positioned at above reactor head, buffering outgas district, is made up of drainage tube and 3 ~ 6 spray headers.
Described a kind of anaerobic ammonia oxidation reactor alleviated granule sludge and float, described effuser is arranged at above buffering outgas district.
Compared with prior art, the advantage that has of the present invention:
(1) the present invention makes full use of the large characteristic of high-load anaerobic ammonia oxidation reactor gas production rate, by strengthening Venturi effect, achieves anaerobic ammonia oxidation reactor inner fluid high-efficiency internal circulation, improves the mass-transfer efficiency in reactor;
(2) the present invention can collect anaerobic ammonium oxidation granular mud scum in buffering outgas district, by arranging calcium salt soln stream feeder apparatus, by soluble calcium salt equably stream add to buffering outgas district, make full use of the stirring action of buffering outgas district air release process, realize precipitin reaction and the attachment of calcium precipitation on particle mud scum of soluble calcium salt, improve density and the settling property of particle mud scum.
(3) the present invention makes full use of the gas stripping and Venturi effect that gas generation process produces, not only can improve the deposition efficiency in buffering outgas district, and can internal recycle be strengthened, the particle mud scum strengthening of being adhered to by calcium precipitation is back to reaction zone, improves the biomass of reaction zone.
(4) diaphragm of the present invention's setting, can effectively stop particle mud scum to enter CD district and water outlet flooded zonevvv, and passes through the effect of inclination distributing damper, improves the sedimentation function of settling tank.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is anaerobic ammonium oxidation granular mud scum
Fig. 3 is the anaerobic ammonium oxidation granular sludge adopting the settling property of embodiments of the invention acquisition excellent.
Embodiment
The invention will be further described by the following examples, and unrestricted the present invention.
See Fig. 1, the present embodiment comprises reactor body and the circulation tube of hollow, reactor body bottom is connected with up-flow reaction chamber, the bottom of up-flow reaction chamber is provided with water inlet pipe, reactor body top is provided with settling chamber, settling chamber comprises the buffering outgas district be arranged in parallel, CD district and water outlet flooded zonevvv, settling chamber's outer wall is provided with rising pipe, water outlet flooded zonevvv is provided with vertical over-pass, the bottom of over-pass connects rising pipe, top, settling chamber is provided with effuser and calcium salt soln stream feeder apparatus, up-flow reaction chamber is connected with settling chamber by up big and down small increaser, up-flow reactor top is provided with shut-off damper, shut-off damper top is provided with diaphragm parallel with it, guiding region is formed between shut-off damper and diaphragm, circulation tube top leads to reactor body in guiding region, it is inner that up-flow reaction chamber is stretched in bottom, the buffering outgas baffle plate that diaphragm top vertical connecting is arranged, water outlet flooded zonevvv and CD district are separated by the distributing damper that tilts.
The shut-off damper of the present embodiment is positioned at up-flow reactor top, the cross-sectional area of comprehensive covering up-flow reaction chamber, and the area of shut-off damper is 1:0.3 ~ 0.7 with the ratio of the cross-sectional area of up-flow reaction chamber, retaining the sectional area that baffle plate and increaser inwall form narrow and small outlet is 1:2 ~ 5 with the ratio of buffering outgas district sectional area, can strengthen Venturi effect like this.
The diaphragm of the present embodiment is vesicular dividing plate, and the hole diameter on dividing plate is 2 ~ 5mm, and on dividing plate, the total area of aperture is 1:1.3 ~ 3 with the ratio of the diaphragm total area, its objective is as preventing particle mud scum from entering CD district.
Up-flow reaction chamber central zone is stretched in the bottom of the present embodiment circulation tube in the middle part of up-flow reaction chamber, the angle β that circulation tube bottom end outlet cross section and up-flow reaction chamber medullary ray are formed is 5 ~ 15 °, circulation tube is 1:8 ~ 15 with the ratio of the cross-sectional area of up-flow reaction chamber, enters circulation tube to prevent the mud mixture of gas and the drive thereof produced bottom up-flow reaction chamber.
The volume ratio of the buffering outgas district in the present embodiment settling chamber, CD district and water outlet flooded zonevvv is 1:1 ~ 1.5:0.8 ~ 1.2.
The cross-sectional area of the present embodiment guiding region is 1:2 ~ 5 with the ratio of buffering outgas district cross-sectional area, is 1:0.2 ~ 0.5, can strengthens the Venturi effect of guiding region and circulation tube with the cross-sectional area ratio of circulation tube.
The present embodiment inclination distributing damper is positioned at settling chamber and separates center sedimentation district and water outlet flooded zonevvv, the length that top exceeds the water surface accounts for 8 ~ 15% of its length total, the cross-sectional area of the slit that inclination distributing damper bottom is formed with increaser inwall is 1:20 ~ 40 with the ratio of settling chamber's cross-sectional area, the angle α formed with the water surface is 70 ~ 80 °, and inclination distributing damper bottom and diaphragm bottom distance l in the horizontal plane and settling chamber's diameter ratio are 1:15 ~ 30.
The calcium salt soln stream feeder apparatus of the present embodiment is positioned at above reactor head, buffering outgas district, is made up of drainage tube and 3 ~ 6 spray headers.
The effuser of the present embodiment is arranged at above buffering outgas district, so that collect the gas discharged.
See Fig. 2, Fig. 3, adopt the present embodiment to carry out operation and be implemented as follows: collect Anammox mud scum 0.3L, recording mud particle size range is 2 ~ 6mm.First the phosphoric acid buffer of 1mM (pH=7) is used to rinse 3 times, be placed on containing saleratus concentration 4g/L again, phosphate dihydrogen sodium concentration 0.3g/L, calcium chloride concentration 0.1g/L, ammonia nitrogen concentration 100mg/L, nitrite concentration are in the mixing solutions (pH=7.5) of 100mg/L, first pass into argon gas deoxygenation 30min, keep solution anoxic condition, stirring velocity 10r/min, stirs 24h.After repeating above-mentioned steps again, pretreated Anammox mud scum is dropped in the device of the present invention of cubic capacity 1.5L, the saleratus concentration in reactor water inlet is kept to be 3 ~ 4g/L, SODIUM PHOSPHATE, MONOBASIC 0.05g/L, reaction zone overhead stream adds the calcium chloride concentration of 0.2g/L, flow acceleration controls as 12mL/ (Ld) by peristaltic pump, through the operation of more than 150 days, overwhelming majority Anammox mud scum is settled down to reactor bottom gradually, the influent ammonia nitrogen of reactor and nitrite concentration can rise to 350mg/L and 380mg/L, average ammonia nitrogen and the nitrite clearance of reactor are respectively 93% and 99%, demonstrate efficient Anammox performance.
Claims (9)
1. the anaerobic ammonia oxidation reactor alleviated granule sludge and float, it is characterized in that, comprise reactor body and the circulation tube (4) of hollow, reactor body bottom is connected with up-flow reaction chamber (2), the bottom of up-flow reaction chamber (2) is provided with water inlet pipe (1), reactor body top is provided with settling chamber (15), settling chamber (15) comprises the buffering outgas district (3) be arranged in parallel, CD district (5) and water outlet flooded zonevvv (6), settling chamber (15) outer wall is provided with rising pipe (7), water outlet flooded zonevvv (6) is provided with vertical over-pass, the bottom of over-pass connects rising pipe, settling chamber (15) top is provided with effuser (12) and calcium salt soln stream feeder apparatus (13), up-flow reaction chamber (2) is connected with settling chamber (15) by up big and down small increaser (14), up-flow reactor top is provided with shut-off damper (8), shut-off damper (8) top is provided with diaphragm (9) parallel with it, guiding region (16) is formed between shut-off damper (8) and diaphragm (9), circulation tube (4) top leads to reactor body in guiding region (16), it is inner that up-flow reaction chamber (2) is stretched in bottom, the buffering outgas baffle plate (11) that diaphragm (9) top vertical connecting is arranged, water outlet flooded zonevvv (6) and CD district (5) are separated by inclination distributing damper (10).
2. a kind of anaerobic ammonia oxidation reactor alleviated granule sludge and float according to claim 1, it is characterized in that, described shut-off damper (8) is positioned at up-flow reactor top, the cross-sectional area of comprehensive covering up-flow reaction chamber, and the area of shut-off damper (8) is 1:0.3 ~ 0.7 with the ratio of the cross-sectional area of up-flow reaction chamber, retaining the sectional area that baffle plate (8) and increaser (14) inwall form narrow and small outlet is 1:2 ~ 5 with the ratio of buffering outgas district (3) sectional area.
3. a kind of anaerobic ammonia oxidation reactor alleviated granule sludge and float according to claim 1, it is characterized in that, described diaphragm (9) is vesicular dividing plate, hole diameter on dividing plate is 2 ~ 5mm, and on dividing plate, the total area of aperture is 1:1.3 ~ 3 with the ratio of the diaphragm total area.
4. a kind of anaerobic ammonia oxidation reactor alleviated granule sludge and float according to claim 1, it is characterized in that, up-flow reaction chamber central zone is stretched into from up-flow reaction chamber (2) middle part in the bottom of described circulation tube (4), the angle β that circulation tube (4) bottom end outlet cross section and up-flow reaction chamber (2) medullary ray are formed is 5 ~ 15 °, and circulation tube (4) is 1:8 ~ 15 with the ratio of the cross-sectional area of up-flow reaction chamber (2).
5. a kind of anaerobic ammonia oxidation reactor alleviated granule sludge and float according to claim 1, it is characterized in that, the volume ratio of the buffering outgas district (3) in described settling chamber (15), CD district (5) and water outlet flooded zonevvv (6) is 1:1 ~ 1.5:0.8 ~ 1.2.
6. a kind of anaerobic ammonia oxidation reactor alleviated granule sludge and float according to claim 1, it is characterized in that, the cross-sectional area of described guiding region (16) is 1:2 ~ 5 with the ratio of buffering outgas district cross-sectional area, is 1:0.2 ~ 0.5 with the cross-sectional area ratio of circulation tube (4).
7. a kind of anaerobic ammonia oxidation reactor alleviated granule sludge and float according to claim 1, it is characterized in that, described inclination distributing damper (10) is positioned at settling chamber (15) and separates center sedimentation district (5) and water outlet flooded zonevvv (6), the length that top exceeds the water surface accounts for 8 ~ 15% of its length total, the cross-sectional area of slit that inclination distributing damper (10) bottom and increaser (14) inwall are formed is 1:20 ~ 40 with the ratio of settling chamber's cross-sectional area, the angle α formed with the water surface is 70 ~ 80 °, inclination distributing damper (10) bottom and diaphragm (9) bottom distance l in the horizontal plane and settling chamber's diameter ratio are 1:15 ~ 30.
8. a kind of anaerobic ammonia oxidation reactor alleviated granule sludge and float according to claim 1, it is characterized in that, described calcium salt soln stream feeder apparatus (13) is positioned at reactor head, buffering outgas district (3) top, is made up of drainage tube and 3 ~ 6 spray headers.
9. a kind of anaerobic ammonia oxidation reactor alleviated granule sludge and float according to claim 1, it is characterized in that, described effuser is arranged at above buffering outgas district.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106582457A (en) * | 2017-01-04 | 2017-04-26 | 岳阳鸿升电磁科技有限公司 | Gas-liquid-solid chemical magnetic induction stabilization equipment |
| CN108217930A (en) * | 2017-12-15 | 2018-06-29 | 北京工业大学 | It is a kind of to control the method that anaerobic ammonium oxidation granular sludge floats in high load capacity reactor |
| CN113697941A (en) * | 2021-09-18 | 2021-11-26 | 镇江同源胜环境科技有限公司 | Device for reducing floating sludge of up-flow anaerobic ammonia oxidation reactor |
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