CN102659282B - Synchronous denitrification and dephosphorization sewage treatment device for immobilized microorganism CASS (cyclic activated sludge system) - Google Patents
Synchronous denitrification and dephosphorization sewage treatment device for immobilized microorganism CASS (cyclic activated sludge system) Download PDFInfo
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- CN102659282B CN102659282B CN201210119729.1A CN201210119729A CN102659282B CN 102659282 B CN102659282 B CN 102659282B CN 201210119729 A CN201210119729 A CN 201210119729A CN 102659282 B CN102659282 B CN 102659282B
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Abstract
The invention discloses a synchronous denitrification and dephosphorization sewage treatment device for an immobilized microorganism CASS (cyclic activated sludge system). The synchronous denitrification and dephosphorization sewage treatment device comprises a pond. A water inlet tube is arranged at one end of the pond, a water outlet tube is arranged at the other end of the pond, a hollow gridding reaction box is disposed in the pond, immobilized microorganism carriers are arranged in the hollow gridding reaction box, and an aeration device is arranged at the bottom of the pond. The synchronous denitrification and dephosphorization sewage treatment device aims to overcome shortcomings in the prior art, is simple in structure, and is efficient and stable.
Description
Technical field
The present invention relates to a kind of immobilized microorganism CASS synchronous denitrification dephosphorizing waste disposal plant.
Background technology
In recent years, along with the sharp increase of China's urban population, increasing phosphorus and nitrogen enters water body, agricultural run-off etc. in addition, and body eutrophication phenomenon is more and more serious.Therefore city domestic sewage discharge has become the major control target of water environmental problems, and wherein the control of nitrogen, phosphorus is the important control target of urban sewage discharge and water environment protection.The < < urban wastewater treatment firm pollutant emission standard > > GB18918-2002 that China implemented on July 1st, 2003 has all made clear and definite and strict regulation to the emission standard of nitrogen, phosphorus.CASS (Cyclic activated sludge system) full name circulating active sludge method is a kind of circular gap sewage disposal technology with denitrogenation dephosphorizing function.This technique grows up on the basis of SBR, and in SBR pond, feed-water end has increased a biological selector, has realized continuous water inlet (precipitation phase, drainage period be water inlet continuously still), intermittent drainage.The technological process of biological selector is followed the matrix accumulation of active sludge--regeneration theory, make active sludge in selector switch, experience the absorption phase (matrix accumulation) of a high loading, in main reaction region, experience subsequently one compared with the substrate degradation stage of underload, to complete whole process and the mud regeneration of whole substrate degradation.But take active sludge as main cyclic activated sludge system, microorganism concn is generally at 1500-3000mg/L, although can be along with the increase of influent load, microorganism concn can increase, but after acquiring a certain degree, because running off, seriously make it to continue to increase, cause the long more difficult propagation of nitrifier of generation cycle.In addition, when sewage water quantity and quality fluctuates when large, system water resistant power and concentration anti impulsion load ability are low, are unsuitable for increase and the senior microbial growth propagation of biomass, thereby cause dephosphorization and denitrification effect unstable.In addition, during traditional CAS S process drain, for not disturbance, be deposited in the sludge blanket of bottom, prevent that the floating matter of the water surface from discharging with current, conventionally arrange and strain hydrophone, strain hydrophone price higher, investment cost is increased.
Summary of the invention
The object of the invention is in order to overcome weak point of the prior art, immobilized microorganism CASS synchronous denitrification dephosphorizing waste disposal plant a kind of simple in structure, efficient, stable is provided.
In order to achieve the above object, patent of the present invention adopts following scheme:
A kind of immobilized microorganism CASS synchronous denitrification dephosphorizing waste disposal plant, include pond body, on described body one end, pond, be provided with water inlet pipe, at the described pond body the other end, be provided with rising pipe, in described pond body, be provided with hollow grid reaction box, in described hollow grid reaction box, be provided with fixed microorganism carrier, on described body bottom, pond, be provided with aerating apparatus.
A kind of immobilized microorganism CASS synchronous denitrification dephosphorizing waste disposal plant as above, it is characterized in that described hollow grid reaction box includes many waffle slabs, described waffle slab connects to form a casing successively, on described casing, be hinged with a upper cover, in described casing, be provided with accommodation space, described fixed microorganism carrier is arranged in described accommodation space.
A kind of immobilized microorganism CASS synchronous denitrification dephosphorizing waste disposal plant as above, is characterized in that described waffle slab is comprised of a plurality of crisscross ribs, and mesh is 1.0-2.0cm.
Any immobilized microorganism CASS synchronous denitrification dephosphorizing waste disposal plant as above, is characterized in that described fixed microorganism carrier is macroporous netlike carrier.
Any immobilized microorganism CASS synchronous denitrification dephosphorizing waste disposal plant as above, is characterized in that described fixed microorganism carrier is 30-50% at the filling ratio of hollow grid reaction box.
A kind of immobilized microorganism CASS synchronous denitrification dephosphorizing waste disposal plant as above, is characterized in that described aerating apparatus includes the aerated conduit being arranged in body bottom, pond, is provided with several aeration heads on described aerated conduit.
A kind of immobilized microorganism CASS synchronous denitrification dephosphorizing waste disposal plant as above, is characterized in that described aeration head is aeration mouth or aeration tube.
A kind of immobilized microorganism CASS synchronous denitrification dephosphorizing waste disposal plant as above, is characterized in that described macroporous netlike carrier is nanocomposite polyurethane foams.
A kind of immobilized microorganism CASS synchronous denitrification dephosphorizing waste disposal plant as above, is characterized in that described nanocomposite polyurethane foams is square, and size is 8.0cm
3-27.0cm
3.
A kind of immobilized microorganism CASS synchronous denitrification dephosphorizing waste disposal plant as above, is characterized in that described nanocomposite polyurethane foams density is that density is 12.0m
3/ kg-24.0m
3/ kg, percentage of open area is 90%-96%.
A kind of immobilized microorganism CASS synchronous denitrification dephosphorizing waste disposal plant as above, the rib 43 described in it is characterized in that is made by hard polyethylene or acrylic plastering.
Patent immobilized microorganism CASS waste disposal plant of the present invention is comprehensive and optimized the feature of traditional CAS S technique, supplements its deficiency, relatively traditional cyclic activated sludge system, and immobilized microorganism CASS waste disposal plant has following obvious characteristic:
1, significantly promoted the microbial biomass of pre-reaction zone and main reaction region, the impact resistance of total system is promoted, guaranteed that system can realize stably reaching standard discharge in the situation that high density is intake.Improving for biodegradable microorganism concn, is the basis that guarantees processing efficiency, is the prerequisite that realizes Reaction time shorten, increase treatment capacity, simplification reaction process and reduce working cost.To conventional cyclic activated sludge system, microorganism concn is generally at 1500-3000mg/L, although can be along with the increase of influent load, microorganism concn can increase, and after acquiring a certain degree, because running off, seriously makes it to continue to increase.By fixed microorganism carrier being set in pre-reaction zone and main reaction region, microorganism concn can reach 22-40g/L, is 7-8 times of conventional activated sludge method;
2, by immobilized microorganism, effective Immobilized Growing nitrifying bacteria community slowly, prolongation mud age, thus greatly promoted the quantity of nitrifying bacteria community in reaction zone, its nitrification ability has been promoted more than 5 times;
3, macroporous netlike carrier is made an addition to hollow grid case, form hollow grid reaction box, the activity space of hollow grid case restriction carrier, be equivalent to whole pond body to be divided into dozens of mini-reactor, in each reactor, carrier can unmanaged flexibility in grid, that the three-dimensional arrangement of each reaction member uniqueness makes to have in unit carrier is simultaneously aerobic, anoxic and three kinds of microenvironments of anaerobism, the absorption of nitrated, the phosphorus of organic aerobic decomposition, nitride can be carried out, a series of processes such as release of anaerobic hydrolysis, acidifying, denitrification and phosphorus can be carried out again.Because these reactions are carried out in identical carrier, can carry out inner mass transfer, thereby the absorption of nitrification and denitrification, phosphorus and release and hydrolysis and aerobic equally correlated process can in succession be carried out in identical carrier, do not need by means such as backflows, to realize as ordinary method.Because inside in hollow grid reaction box has formed from aerobic to anaerobism continually varying microenvironment, for the microorganism of various different qualities provides good life condition, thereby in unit carrier, formed from nutrition-bacterium-protozoon-metazoal food chain, a large amount of metazoans and protozoon engulf aging bacterium, make bacterium have extremely strong activity, processing efficiency is high, sludge output is few always.In each hollow grid reaction box, fixed microorganism carrier is constantly in suspended state, and carrier surface upgrades fast, thereby has increased microorganism and nutraceutical touch opportunity, and can make the meta-bolites of microorganism remove as soon as possible, for the existence of microorganism provides splendid condition.Because hollow grid reaction box is positioned in whole pond, carrier, in continuous float state in water, has obvious repetition cutting action to bubble simultaneously, thereby the dissolved oxygen value in water is improved, and oxygen transfer efficiency increases.The continuous motion of carrier and and and bubbles strike, carrier is continuously rinsed, thereby has prevented the obstruction of carrier, and kept the high activity of bacterium.
4, can be by different pore size by hollow grid case, the urethane carrier of different porosities is dispersed in whole CASS biochemistry pool more uniformly, reduce the wearing and tearing between carrier in service, extended the life-span of carrier, improve the mass transfer effect of carrier and waste water, extend effective duration of contact of waste water and carrier, promote on the whole the ability of biochemical system.
5, patent water-freeing arrangement of the present invention is simple, easy to operate.During traditional CAS S process drain, for not disturbance, be deposited in the sludge blanket of bottom, prevent that the floating matter of the water surface from discharging with current, conventionally arrange and strain hydrophone.Patent of the present invention is owing to having added hollow grid reaction box, after aeration stops, microorganism is together deposited in hollow grid reaction box bottom with carrier, and at this moment carrier has played the effect of bacteria bed, thereby the impact of current disturbance when not only microorganism is not subject to draining, and supernatant liquor there is no floating matter, so strain hydrophone without setting, but be provided with rising pipe at draining lowest water level place, only need open rising pipe valve when draining, device is simple, easy to operate.
In sum, immobilized microorganism CASS waste disposal plant has that structures are few, technical process is simple, characteristics of compact layout, flexible operation, floor space are less, the good feature and advantage for the treatment of effect.Phosphor-removing effect is in 92% left and right, and NH
4 +the clearance of-N reaches more than 99%, and TN clearance reaches more than 88%.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention.
Fig. 2 is the schematic diagram of hollow grid reaction box of the present invention.
Embodiment
Below in conjunction with accompanying drawing explanation and embodiment, the invention will be further described:
A kind of immobilized microorganism CASS synchronous denitrification dephosphorizing waste disposal plant as illustrated in fig. 1 and 2, include pond body 1, on described pond body 1 one end, be provided with water inlet pipe 2, at described pond body 1 the other end, be provided with rising pipe 3, in described pond body 1, be provided with hollow grid reaction box 4, in described hollow grid reaction box 4, be provided with fixed microorganism carrier 5, on described pond body 1 bottom, be provided with aerating apparatus 6.
As shown in Figure 2, hollow grid reaction box 4 described in the present invention includes many waffle slabs 41, described waffle slab connects to form a casing 42 successively, on described casing 42, be hinged with a upper cover, in described casing 42, be provided with accommodation space, described fixed microorganism carrier 5 is arranged in described accommodation space.
Waffle slab 41 described in the present invention is comprised of a plurality of crisscross ribs 43, and mesh is 1.0-2.0cm.Described rib 43 is made by hard polyethylene or acrylic plastering.Fixed microorganism carrier 5 is limited in hollow grid reaction box 4 and forms the filtering layer that floats, hollow grid reaction box 4 is rectangular parallelepiped or square, volume size is 1.0-1.5 cubic meter, be convenient to install, change and maintenance, size of mesh opening is adjustable according to fixed microorganism carrier size, nano compound polyurethane carrier is limited in grid case, nano compound polyurethane carrier is cubes, be of a size of 2.0-3.0cm, the size of mesh opening of hollow grid reaction box is 1.0-2.0cm, carrier is evenly distributed in grid case, make microbial fixed carrier being evenly distributed in the body of pond.
Fixed microorganism carrier 5 described in the present invention is macroporous netlike carrier.Described fixed microorganism carrier 5 is 30-50% at the filling ratio of hollow grid reaction box 4.Described macroporous netlike carrier is nanocomposite polyurethane foams.Described nanocomposite polyurethane foams is square, and size is 8.0cm
3-27.0cm
3.
Aerating apparatus 6 described in the present invention includes the aerated conduit being arranged in body bottom, pond, is provided with several aeration heads 61 on described aerated conduit.Wherein said aeration head 61 is aeration mouth or aeration tube.
Fig. 1 is the schematic diagram of immobilized microorganism CASS synchronous denitrification dephosphorizing waste disposal plant, pond body 1 is square or circular, bottom water inlet, at the bottom of pond, settle aerating apparatus 6, adopt the compensation aeration of dotted line, provide biochemical reaction required oxygen, allow fixed microorganism carrier in quick condition, prevent from forming microbial film and stop up.Staggered support is settled on aeration tube top, and for placing hollow grid reaction box 4, hollow grid reaction box 4 staggers mutually, is full of whole pond body.The quantity of hollow grid reaction box 4 and large I are adjusted according to pond body size.Whole pond body consists of dozens of floating living reactor, in each reactor, according to the pore structure of carrier, can form anaerobism, anoxic, aerobic microenvironment, be beneficial to the carrying out of simultaneous nitrification and denitrification reaction, and load of microorganisms amount is large, fixed microorganism carrier is in quick condition, microorganism upgrades fast, biochemical reaction efficiency is high, and immobilized microorganism has been improved tolerance greatly, greatly improves treatment effect.Whole pond body simple structure, maintenance and replacing are convenient, only need reaction box be taken out in pond with crane, after replacing, can directly place in pond, easy to maintenance, can be applicable to especially the transformation of traditional biochemistry pool body, improve treatment effect.
While using in patent of the present invention, municipal effluent, by water inlet pipe 2, enters pond body 1 continuously, limit water inlet, and limit aeration, thus organic pollutant is decomposed by microbiological oxidation, meanwhile, the ammonia nitrogen in sewage is also converted into nitric nitrogen by the nitrification of microorganism.Stop after aeration, continue water inlet, microorganism utilizes remaining dissolved oxygen in water to carry out oxygenolysis, and along with the reduction of dissolved oxygen content, good oxygen condition transforms to anoxic gradually, and certain denitrification occurs.Because microorganism is immobilized, even if therefore do not stop into water in this stage, still can obtain good sedimentation effect.After precipitate phase completes, open rising pipe 3 and discharge supernatant liquor.After finishing, draining can enter the process that the next one is cycled to repeat.
When immobilized microorganism CASS synchronous denitrification dephosphorizing waste disposal plant carries out real life sewage disposal running, test-results shows, for COD, is 368mg/L, NH
4 +-N is that 65mg/L, TN are that 92mg/L, SS are the sanitary sewage that 365mg/L, total phosphorus are 5.8mg/L, and the whole biochemical reaction time is 6.0-8.0h, and reactor water outlet COD is 35mg/L, NH
4 +-N be 0.11mg/L, SS be 16.0mg/L, TN be 11mg/L, total phosphorus be 0.45mg/L, COD clearance amount to can reach 90%, NH
4 +-N is 99.8%, SS is 95%, total phosphorus is 92%, and last effluent quality reaches < < urban wastewater treatment firm pollutant emission standard > > GB18918-2002 one-level A standard completely.
Claims (5)
1. an immobilized microorganism CASS synchronous denitrification dephosphorizing waste disposal plant, include pond body (1), on described pond body (1) one end, be provided with water inlet pipe (2), at described pond body (1) the other end, be provided with rising pipe (3), in described pond body (1), be provided with hollow grid reaction box (4), in described hollow grid reaction box (4), be provided with relocatable fixed microorganism carrier (5), on described pond body (1) bottom, be provided with aerating apparatus (6), described fixed microorganism carrier (5) is macroporous netlike carrier, described macroporous netlike carrier is nanocomposite polyurethane foams, described nanocomposite polyurethane foams is square, size is 8.0cm
3-27.0cm
3the density of described nanocomposite polyurethane foams is 12.0m
3/ kg-24.0m
3/ kg, percentage of open area is 90%-96%, described fixed microorganism carrier (5) is 30-50% at the filling ratio of hollow grid reaction box (4), described aerating apparatus (6) includes the aerated conduit being arranged in body bottom, pond, is provided with several aeration heads (61) on described aerated conduit.
2. a kind of immobilized microorganism CASS synchronous denitrification dephosphorizing waste disposal plant according to claim 1, it is characterized in that described hollow grid reaction box (4) includes many waffle slabs (41), described waffle slab connects to form a casing (42) successively, on described casing (42), be hinged with a upper cover, in described casing (42), be provided with accommodation space, described fixed microorganism carrier (5) is arranged in described accommodation space.
3. a kind of immobilized microorganism CASS synchronous denitrification dephosphorizing waste disposal plant according to claim 2, is characterized in that described waffle slab (41) has a plurality of crisscross ribs (43) to form, and mesh is 1.0-2.0cm.
4. a kind of immobilized microorganism CASS synchronous denitrification dephosphorizing waste disposal plant according to claim 1, is characterized in that described aeration head (61) is aeration mouth or aeration tube.
5. a kind of immobilized microorganism CASS synchronous denitrification dephosphorizing waste disposal plant according to claim 3, is characterized in that described rib (43) made by hard polyethylene or acrylic plastering.
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| CN103011391B (en) * | 2012-12-03 | 2017-02-15 | 北京清大国华环境股份有限公司 | MBR (Membrane Bioreactor) method and device for microbial immobilization |
| CN105016464A (en) * | 2014-04-30 | 2015-11-04 | 北京科净源科技股份有限公司 | Biological stuffing for denitrification |
| CN105016478A (en) * | 2014-04-30 | 2015-11-04 | 北京科净源科技股份有限公司 | Sewage treatment system for denitrification through biological stuffing and installation method of sewage treatment system |
| CN104085992B (en) * | 2014-08-01 | 2015-12-02 | 新昌县镜岭镇柳良轴承厂 | A kind of sewage treatment process with warming solar energy effect |
| CN104098186B (en) * | 2014-08-01 | 2015-12-30 | 徐凯 | A kind of immobilized microorganism sewage treatment process |
| CN104085993B (en) * | 2014-08-01 | 2015-12-09 | 新昌县澄潭镇澄设机械厂 | A kind of constructed wetland device |
| CN104478078A (en) * | 2014-12-09 | 2015-04-01 | 符惠 | Immobilized microbial tank for aeration |
| CN104556365B (en) * | 2014-12-25 | 2016-08-24 | 桑德集团有限公司 | CASS pond high-efficient deamination nitrogen remodeling method |
| CN104724817B (en) * | 2015-03-31 | 2017-01-18 | 北京三泰正方生物环境科技发展有限公司 | Net cage type biological carrier, immobilized microbiological treatment sewage device and application of immobilized microbiological treatment sewage device |
| CN105731652A (en) * | 2016-02-19 | 2016-07-06 | 厦门南卡环境治理有限公司 | Sludge reduction system |
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| CN201406362Y (en) * | 2009-05-26 | 2010-02-17 | 北京理工大学 | Immobilized aerobic-anaerobic device for degrading toxic organisms |
| CN102190368A (en) * | 2010-07-15 | 2011-09-21 | 浙江浙大海元环境科技有限公司 | Polyurethane porous suspended carrier containing attapulgite |
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| CN1508081A (en) * | 2002-12-16 | 2004-06-30 | 中国石油化工股份有限公司 | Biological filler and preparing method and apparatus constructed thereof and use |
| CN2603079Y (en) * | 2003-06-11 | 2004-02-11 | 长春工程学院 | Micropressure internal circulation active mud and waste water treatment device |
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