CN101602535B - Phosphor recovery crystallization reactor and phosphor recovery method - Google Patents
Phosphor recovery crystallization reactor and phosphor recovery method Download PDFInfo
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- CN101602535B CN101602535B CN200910157928XA CN200910157928A CN101602535B CN 101602535 B CN101602535 B CN 101602535B CN 200910157928X A CN200910157928X A CN 200910157928XA CN 200910157928 A CN200910157928 A CN 200910157928A CN 101602535 B CN101602535 B CN 101602535B
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Abstract
The invention relates to a phosphor recovery crystallization reactor and a phosphor recovery method. The reactor is in inner-outer dual barrel structure, wherein the inner barrel is disposed at the center position of the outer barrel. The reactor includes an aeration stripping area, a crystallization reaction area, a precipitation separation area, a high concentration phosphor mud area and a buffering area, wherein the crystallization reaction area communicates with the precipitation separation area through the upper portion of the buffering area, so that the sewage water after the crystallization reaction in the crystallization reaction area flows into a precipitation separation area without affecting the high concentration phosphor mud area. The invention fully utilizes effective ingredients in the anaerobic treated water of the high concentration waste water of domestic animal and poultry, enhances pH value of the anaerobic treated water by aeration stripping, removes phosphor in the form of crystal of ammoniomagnesium phosphate using relatively high concentration of phosphor and ammonian in the waste water of domestic animal and poultry. The total removal rate of the phosphor can reach 50-60% without any chemical agents added. Phosphor is recovered in form of crystals, which is beneficial to utilization of the recovered phosphor.
Description
Technical field
The present invention relates to a kind of device that waste water of livestock poultry is handled and phosphor resource reclaims that is used for, particularly relate to a kind of phosphorus and reclaim crystallization reactor and from waste water of livestock poultry, efficiently carry out the method that phosphorus reclaims.
Background technology
It is one of most important component in the environmental improvement that waste water of livestock poultry is handled.At present, the processing of waste water of livestock poultry is mainly handled qualified discharge based on end, simultaneously, passes through the anaerobic treatment recovery part energy---biogas in the process of handling.In recent years, exhausted day by day along with Mineral resources such as phosphorus, people begin to pay close attention to the recovery of Mineral resources such as phosphorus in the waste water.The theory and technology that phosphorus reclaims has also obtained certain development.The main method that reclaims is by adding medicament in the higher waste water of phosphorous concentration ratio, regulate the pH value of waste water, add magnesium salts simultaneously, forming struvite (MgNH at present
4PO
4) solid and by the precipitation or the crystalline mode from waste water, separate.But an important feature of prior art is to improve the pH value of waste water by adding the mode of chemical agent, and it is long-pending to reduce the struvite ionic concn, further reduces its solubleness, forms the struvite solid.In addition, prior art also being arranged is by adding the concentration of liming raising pH value and calcium ion, forming CaNH
4PO
4Precipitation is come out phosphorus from waste water reclamation.But these technology also are in the laboratory study stage at present.Though, can realize phosphorus is reclaimed from water by aforesaid method, need add chemical agent, the pH value of regulation system, the operation more complicated, working cost is than higher.
From the theory to the application, the most important thing is the achievements conversion in the laboratory to be come out by reactor.From the reactor types of present proposition, mainly be by adding quartz sand or woven wire etc. at reactor as nucleus, struvite is grown up on nucleus gradually, by nucleus the solid struvite is separated then; Also have by precipitation mode the phosphorous solid that does not contain nucleus is separated.But these reactors all also do not use in actual engineering at present.
Summary of the invention
From high phosphorus-containing wastewater, reclaim phosphorus in order better to realize, particularly in order from waste water of livestock poultry, to reclaim phosphorus in economical and efficient ground, the present invention is beneficial in the water outlet of anaerobic reactor saturated carbonic acid gas to the influence of water quality acid base equilibrium, mode by stripping, improve the pH value of water outlet, thereby for the crystallization of magnesium ammonium phosphate creates conditions, under the situation that does not add medicament, form magnesium ammonium phosphate sediment, reach efficient low-consume reclaims phosphorus from sewage purpose.
For achieving the above object, the present invention includes a kind of reactor of structure of the inside and outside bitubular, realize isolating, make different zones have different functions by dividing plate.
According to an aspect of technical scheme of the present invention, a kind of phosphorus reclaims crystallization reactor, and described reactor is inside and outside double-barrel structure, and described reactor comprises: the aeration stripping district is positioned at the top of the inner core of described reactor; The crystallization reaction district is positioned at the bottom of the inner core of described reactor; Depositing separation area, between the inner core of described reactor and urceolus and in the form of a ring; High concentration phosphorus mud district is positioned at the bottom of described reactor; And buffer zone, between this depositing separation area and this high concentration phosphorus mud district, and be in this inner core below, in this, form the buffering height between tube bottom and this high concentration phosphorus mud district; Wherein, micro-pore aeration system is installed, is provided with water inlet system, from the water (flow) direction of the waste water of this water inlet system with from the air flow line countercurrent flow of the gas of this micro-pore aeration system at the top in this aeration stripping district in bottom, this aeration stripping district; And wherein, this crystallization reaction district and this depositing separation area are connected by the top of this buffer zone, so that the sewage behind this crystallization reaction district crystallization reaction enters this depositing separation area and high concentration phosphorus mud district do not exerted an influence.
Another aspect according to technical scheme of the present invention, a kind of phosphorus recovery method, it is used above-mentioned phosphorus and reclaims crystallization reactor, said method comprising the steps of: water inlet step enters in this aeration stripping district via this water inlet system through the waste water of livestock poultry behind the anaerobic reaction; The aeration stripping step, micro-pore aeration system by this bottom, aeration stripping district is supplied gas, the air of being sent into enters in the waste water in this aeration stripping district with the form of micro-bubble, from the water (flow) direction of the waste water of this water inlet system with from the air flow line countercurrent flow of the gas of this micro-pore aeration system, make phosphorus, ammonia nitrogen and magnesium ion in the waste water form solid-state magnesium ammonium phosphate and from water, separate out; Crystallisation step, the waste water that comes out from this aeration stripping district enters this crystallization reaction district, and the small crystal of the magnesium ammonium phosphate that forms in this aeration stripping district and other crystal collide and form more macrocrystal particle, and separate from water by the mode of gravitational settling; The precipitate and separate step, the water outlet in this crystallization reaction district enters this depositing separation area through the water stream channel on this buffer zone top, in the direction of the current of this depositing separation area is upwards and outside, contain the reason of the solid particulate of magnesium ammonium phosphate owing to gravity, a part flows away with current, and the particle that particle diameter is bigger then sinks in this high concentration phosphorus mud district; Enrichment step, along with the prolongation of time, the mud that sinks in this high concentration phosphorus mud district continues to sink along its pyramidal structure, after the particle that sinks to the particle that sinks to is earlier formed extruding, the water in the mud push away, with the concentration of raising mud.
The invention has the beneficial effects as follows: fully be beneficial in the anaerobic treatment water outlet of high density waste water of livestock poultry effectively composition, improve the pH value of anaerobism water outlet by the mode of aeration stripping, utilize phosphorus higher in the waste water of livestock poultry and ammonia nitrogen concentration, phosphorus is removed from waste water by the form of ammoniomagnesium phosphate crystal body, the clearance of total phosphorus can reach 50-60%, and do not need to add any chemical agent, from having reduced the expense that phosphorus reclaims, improved the benefit that phosphorus reclaims, the phosphorus that reclaims is the form of xln simultaneously, help reclaiming the utilization of phosphorus, organically useful combining reclaimed in sewage disposal and resource.The recovery of carrying out phosphorus by this reactor has reduced investment, takes up an area of to lack the characteristics that working cost is low.
Description of drawings
Fig. 1 illustrates the cross-sectional view that phosphorus of the present invention reclaims crystallization reactor
Fig. 2 illustrates the vertical view that phosphorus shown in Figure 1 reclaims crystallization reactor
Fig. 3 illustrates and uses the operational process synoptic diagram that phosphorus recovery crystallization reactor of the present invention carries out the waste water of livestock poultry processing
Embodiment
The present invention is described in detail below in conjunction with drawings and Examples.
As shown in Figure 1, 2: it is the inner/outer tube structure that phosphorus of the present invention reclaims crystallization reactor, and its inner core is positioned at the center position of reactor urceolus; Described reactor comprises: in the aeration stripping district 1 at this inner core middle part, in this crystallization reaction district 2 of tube bottom, the depositing separation area 3 of this urceolus middle and upper part, outside this high concentration phosphorus mud district 4 and the buffer zone 5 between this depositing separation area 3 and this high concentration phosphorus mud district 4 of tube bottom, this buffer zone 5 also is positioned under this crystallization reaction district 2 simultaneously; Be installed on micro-pore aeration system 6 in 1 bottom, aeration stripping district, the top is provided with water inlet system 7; Top in precipitate and separate device district 3 is provided with water gathering system 8; Water gathering system 8 is made up of water leg 9 and water shoot 10; In the bottom in high concentration phosphorus mud district 4 is sludge drainage system 11; Crystallization reaction district 2 and buffer zone 5 and depositing separation area 3 are connected; The shape of reactor each several part is not standard with the circle, can become rectangle and square under the suitable situation of hydraulics yet.
1 bottom, aeration stripping district of reclaiming crystallization reactor at described phosphorus is equipped with micro-pore aeration system 6, and the bubble diameter that enters aeration stripping district 1 is more small, guarantees the stripping effect of micro-pore aeration system 6; Water inlet system 7 enters the downward liquid flow in aeration stripping district 1 at the top in aeration stripping district 1, and bubble upwards flows, and forms the countercurrent flow of water (flow) direction and gas direction, reaches better stripping effect.
The top that described phosphorus reclaims the depositing separation area 3 of crystallization reactor is provided with water gathering system 8, water gathering system 8 is made up of water leg 9 and water shoot 10, described water leg is evenly arranged at depositing separation area 3 tops, the water outlet of assurance system evenly makes progress, avoid occurring short stream, so that the solid-liquid separation efficiency of system remains on higher level, flow out crystallization reactor through the sewage after separating through water gathering system 8, the clearance of total phosphorus can reach 50-60% in its water outlet.Through solid-liquid separation, xln is trapped within the crystallization reactor, finally is deposited in high concentration phosphorus mud district 4, and 4 bottoms, high concentration phosphorus mud district are provided with sludge drainage system 11, spoil disposal is controlled regularly spoil disposal of spoil disposal motorized valve by supporting automatic control system, and the mud phosphorus content of being discharged is 15-20%.
The total area of the micro-pore aeration system 6 of described phosphorus recovery crystallization reactor is no less than the 5-10% of the inner core total area, and the aeration rate of micro-pore aeration system 6 is no less than the 5-10m3/m3 pond and holds .h.
Depositing separation area 3 and aeration stripping district 1 that described phosphorus reclaims crystallization reactor are made up of inside and outside concentric cylinder respectively, urceolus anchor ring area long-pending and inner core compares 1: 1-2: between 1, the reactor inner core is than the short 500-1000mm of urceolus, to guarantee that sewage enters depositing separation area smoothly, the height of urceolus is generally at 2000-4000mm, aspect ratio is generally 1: 1-1: between 3, the upflow velocity of current is not more than 0.8m/h between urceolus and inner core.
Described phosphorus reclaims crystallization reactor and is provided with buffer zone 5 in the bottom in depositing separation area 3 and crystallization reaction district 2, buffer zone 5 is used to avoid current that the precipitating sludge in high concentration phosphorus mud district 4 is caused interference and reenters depositing separation area 3, and the height of buffer zone is 300-400mm.
The present invention also comprises the complete automatic control system of a cover, can finish in the aeration stripping district 1 according to the automatic adjustment of turnover pH value variation to aeration rate.The hardware components of this automatic control system is a known technology, and the efficient phosphorus of software section livestock and poultry then according to the present invention reclaims the workflow of crystallization reactor and sets suitable controlled variable.
Use reactor of the present invention and carry out operational process and the operation scheme that waste water of livestock poultry is handled:
As shown in Figure 3: it is the structure of sequestered partition in reactor that phosphorus of the present invention reclaims crystallization reactor, has formed aeration stripping district 1, crystallization reaction district 2, depositing separation area 3, high concentration phosphorus mud district 4 and buffer zone 5.The handled waste water of livestock poultry of this reactor is the sewage behind the anaerobic reaction, at first enters aeration stripping district 1.In aeration stripping district 1, pass through after the aeration stripping, gas concentration lwevel significantly reduces in its waste water, the pH value rises significantly, reduced the precipitation solubility product of magnesium ammonium phosphate, the magnesium ammonium phosphate that is partly dissolved attitude becomes tiny solid crystals, in crystallization reaction district 2, between the tiny ammoniomagnesium phosphate crystal body and and other solid particulate between further assemble to form and can precipitate bigger particle, enter depositing separation area 3 then, xln is separated from waste water, enter high concentration phosphorus mud district 4 through buffer zone 5, waste water is discharged from reactor through the water gathering system 8 at depositing separation area 3 tops.The phosphorus that is reclaimed exists with the form of high concentration phosphorus mud, through can be used for agricultural or chemical industry purposes after the processing such as mummification.
What enter this reactor must be the waste water of handling through anaerobic reactor.Because the organic concentration of waste water of livestock poultry is all than higher, simple employing aerobic treatment or materialization processing cost are too high, adopting the anaerobic treatment that does not need power and available recovery part biogas substantially is that most waste water of livestock poultry are handled a step must taking, to reduce organic concentration in the waste water significantly.Organism is converted to biogas, carbonic acid gas and water by anaerobic bacterium in anaerobic reactor, and therefore concentration of carbon dioxide substantially all is saturated in the water outlet of anaerobic reactor.The carbonic acid gas of solubilised state is to acid base equilibrium important influence in the water, and after gas concentration lwevel in the water reduced, the acid base equilibrium in the waste water will move to the meta-alkalescence direction, and the pH value raises, and this is a phosphorus crystalline key.Therefore, the waste water that enters this reactor must be the water outlet of anaerobic reactor.The water outlet of anaerobic reactor enters crystallization reactor must at first enter reactor by water inlet system 7 aeration stripping district 1.
Be installed on micro-pore aeration system 6 in the bottom in aeration stripping district 1, air is discharged in the water by the form of micro-pore aeration system 6 backs with micro-bubble.For the degree of uniformity of the distribution that guarantees micro-bubble, the total area of micro-pore aeration system 6 is no less than the 5-10% of the inner core total area, and the aeration rate of micro-pore aeration system 6 is no less than the 5-10m3/m3 pond and holds .h.Small air filled cavity moves upward under buoyancy function, and with the waste water countercurrent flow that enters aeration stripping district 1 from top and utilize gravity to flow downward, both fully contact.Because the content of Carbon Dioxide in Air is fewer, the intrinsic standoff ratio of its carbonic acid gas is lower, and the carbonic acid gas in the waste water is in state of saturation, the dividing potential drop of its carbonic acid gas is very high, therefore carbon dioxide molecule will move to the direction that branch forces down, enter in the air filled cavity, along with air filled cavity is overflowed from waste water.Because the stripping of carbonic acid gas, the pH value of waste water raises rapidly, has reduced the solubility product of magnesium ammonium phosphate.Because the concentration of phosphate radical and ammonia nitrogen is all than higher in the waste water of livestock poultry, under high pH value, the amassing of both concentration much larger than its solubility product.Magnesium ion in phosphorus, ammonia nitrogen and the waste water forms solid-state magnesium ammonium phosphate and separates out from water.
The waste water that comes out from aeration stripping district 1 enters crystallization reaction district 2, crystallization reaction district 2 is metastable zones, collide for the 1 small crystal that forms and other crystal or solid particulate and formed more macrocrystal particulate chance, so that can from water, separate by the mode of gravitational settling in the aeration stripping district.Through the reaction in crystallization reaction district 2, phosphorus has become solid-state magnesium ammonium phosphate, and has formed enough big particle, for follow-up solid-liquid separation has been created condition.
The water outlet in crystallization reaction district 2 enters depositing separation area 3 through the top of buffer zone 5, locates dividing plate can be set in the bottom in crystallization reaction district 2 (being the bottom of inner core), and promptly be full communicating herein between the inner/outer tube.In the direction of the current of depositing separation area 3 is upwards and outside, in the process of flow, contain the reason of the solid particulate of magnesium ammonium phosphate owing to gravity, a part flows away with current, and the bigger particle sinking velocity of particle diameter is greater than flow velocity, just sink in the high concentration phosphorus mud district 4, realized the recovery of phosphorus from waste water.And from reactor, discharge by the water gathering system 8 of depositing separation area 3 through the sewage after the solid-liquid separation, the clearance of Inlet and outlet water total phosphorus is at 50-60%.Water gathering system 8 mainly is made up of water leg 9 and water shoot 10.The main effect of water leg 9 is to guarantee to discharge from whole depositing separation area 3 uniformly from the sewage of depositing separation area 3, farthest reduces the interference to the solid-liquid separation process.Separating effect for depositing separation area 3, the area ratio of depositing separation area 3 outer toroid and aeration stripping district inner core is 1: 1-2: between 1, bottom at reactor, inner core is than the short 500-1000mm of urceolus, to guarantee that sewage enters depositing separation area 3 smoothly, the height of urceolus is generally 2000-4000mm, and aspect ratio is generally 1: 1-1: between 3, the upflow velocity of current is not more than 0.8m/h between urceolus and inner core.
The solid-state magnesium ammonium phosphate that precipitate and separate is come out sinks to high concentration phosphorus mud district 4.Prolongation along with the time; the mud that sinks to high concentration phosphorus mud district 4 is more and more, and this high concentration phosphorus mud district 4 be a pyramidal structure, after the particle that sinks to can be to the particle formation squeezing action that sinks to earlier; water between the mud is pushed away, played the spissated effect of gravity.In high concentration phosphorus mud district 4, along with solid particulate variation in time, sludge concentration raises gradually from top to bottom.The sludge drainage system 11 that is located at high concentration phosphorus mud district 4 is positioned at its bottom, finishes the timing spoil disposal of system automatically by automatic controlling system, and the concentration of the phosphorous precipitating sludge that the assurance system discharges is in higher level, and the mud phosphorus content is about 15-20%.
The main effect that is positioned at high concentration phosphorus mud district 4 and depositing separation area 3 intermediary buffer zones 5 is for the current that guarantee to come from crystallization reaction district 2 do not impact the solid granulates that sinks to high concentration phosphorus mud district 4, reenters depositing separation area 3 in order to avoid be in the solid particulate of precipitation criticality.The height of buffer zone is between 300-400mm.
The automatic control system of system is responsible for finishing according to passing in and out the variation of pH value to the automatic adjustment of aeration rate in the aeration stripping district 1 and the timing spoil disposal of sludge drainage system, sets suitable controlled variable.
Test condition and method:
It is 4m that the phosphorus that test is adopted reclaims the crystallization reactor volume
3, the processing water yield is 40m
3/ d, total residence time is 3 hours; The inner diameter of steel flue of reactor is 1.9m, and the urceolus diameter of reactor is 3m, and height for reactor is 2.5m.The reactor water inlet is the waste water of raising pigs through anaerobic reactor.
Continuous monitor system water outlet 20 days, every day sampling analysis reactor Inlet and outlet water total phosphorus concentration.Measure phosphorated concentration in the mud simultaneously, its test result sees the following form 1 and 2:
Table 1 test duration internal reaction device Inlet and outlet water concentration of suspension and turnover COD concentration
Other processing parameter in table 2 test duration
| Sequence number | | Quantity | Remarks | |
| 1 | Aeration intensity | 5m3/ |
||
| 2 | The | 3h | ||
| 3 | Energy consumption | 0.4kwh/ ton sewage |
According to the test gained, phosphorus recovery crystallization reactor can reach about 50% the clearance of total phosphorus in the waste water of livestock poultry, and the phosphorus content of mud can reach 15～20%, and the clearance of reactor and mud phosphorus content have satisfied design requirements.
Claims (9)
1. a phosphorus reclaims crystallization reactor, and described reactor is inside and outside double-barrel structure, and described reactor comprises:
Aeration stripping district (1) is positioned at the top of the inner core of described reactor;
Crystallization reaction district (2) is positioned at the bottom of the inner core of described reactor;
Depositing separation area (3) is between the inner core and urceolus of described reactor;
High concentration phosphorus mud district (4) is positioned at the bottom of described reactor; And
Buffer zone (5) is positioned between this depositing separation area (3) and this high concentration phosphorus mud district (4), and is in this inner core below, forms the buffering height in this between tube bottom and this high concentration phosphorus mud district (4);
Wherein, in this bottom, aeration stripping district (1) micro-pore aeration system (6) is installed, be provided with water inlet system (7) at the top in this aeration stripping district (1), from the water (flow) direction of the waste water of this water inlet system (7) with from the air flow line countercurrent flow of the gas of this micro-pore aeration system (6); And
Wherein, this crystallization reaction district (2) is connected with this buffer zone (5), and be connected by this buffer zone (5) and this depositing separation area (3), so that the sewage behind this crystallization reaction district (2) crystallization reaction enters this depositing separation area (3) and high concentration phosphorus mud district (4) is not exerted an influence.
2. phosphorus according to claim 1 reclaims crystallization reactor, wherein, be provided with water gathering system (8) at the top of described depositing separation area (3), this water gathering system (8) is made up of water leg (9) and water shoot (10), flows out described reactor through the sewage after separating through this water gathering system (8).
3. phosphorus according to claim 1 reclaims crystallization reactor, wherein, this high concentration phosphorus mud district (4) is taper shape wide at the top and narrow at the bottom, be provided with sludge drainage system (11) in this bottom, high concentration phosphorus mud district (4), the operation of this sludge drainage system (11) is finished automatically by its spoil disposal motorized valve of supporting automatic controlling system.
4. reclaim crystallization reactor according to any one described phosphorus in the claim 1 to 4, wherein, the height of this buffer zone (5) is 300-400mm.
5. phosphorus recovery method, it is used according to any one described phosphorus in the claim 1 to 4 and reclaims crystallization reactor, said method comprising the steps of:
Water inlet step: enter in this aeration stripping district (1) via this water inlet system (7) through the waste water of livestock poultry behind the anaerobic reaction;
The aeration stripping step: the micro-pore aeration system (6) by this bottom, aeration stripping district (1) is supplied gas, the air of being sent into enters in the waste water in this aeration stripping district (1) with the form of micro-bubble, from the water (flow) direction of the waste water of this water inlet system (7) with from the air flow line countercurrent flow of the gas of this micro-pore aeration system (6), make phosphorus, ammonia nitrogen and magnesium ion in the waste water form solid-state magnesium ammonium phosphate and from water, separate out;
Crystallisation step: the waste water that comes out from this aeration stripping district (1) enters this crystallization reaction district (2), the small crystal of the magnesium ammonium phosphate that forms in this aeration stripping district (1) and other crystal collide and form more macrocrystal particle, and separate from water by the mode of gravitational settling;
The precipitate and separate step: the water outlet in this crystallization reaction district (2) enters this depositing separation area (3) through the water stream channel on this buffer zone (5) top, in the direction of the current of this depositing separation area (3) is upwards and outside, contain the reason of the solid particulate of magnesium ammonium phosphate owing to gravity, a part flows away with current, and the particle that particle diameter is bigger then sinks in this high concentration phosphorus mud district (4);
Enrichment step: along with the prolongation of time, the mud that sinks in this high concentration phosphorus mud district (4) continues to sink along its pyramidal structure, after the particle that sinks to the particle that sinks to is earlier formed extruding, the water in the mud push away, with the concentration of raising mud.
6. phosphorus recovery method according to claim 5, wherein, also comprise drain step, after the precipitate and separate step, discharged from reactor by the water gathering system (8) on this depositing separation area (3) top through the sewage after the solid-liquid separation, the clearance of total phosphorus is 50-60% in the waste water of being discharged.
7. phosphorus recovery method according to claim 5, wherein, also comprise the spoil disposal step, after enrichment step, under the control of this automatic control system, the sludge drainage system (11) that is located at this bottom, high concentration phosphorus mud district (4) is finished the timing spoil disposal of described reactor automatically.
8. according to any one described phosphorus recovery method in the claim 5 to 7, wherein, the upflow velocity of current is not more than 0.8m/h between this urceolus and this inner core.
9. according to any one described phosphorus recovery method in the claim 5 to 7, wherein, after the process above-mentioned steps, through the concentration reduction 50-60% of total phosphorus in the waste water of livestock poultry of anaerobic treatment, the phosphorus content of the high concentration phosphorus mud that is obtained simultaneously reaches more than the 15-20%.
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| CN101817581B (en) * | 2010-04-08 | 2012-11-07 | 同济大学 | Integrated nitrogen and phosphorus recovery device in struvite method |
| CN101935093B (en) * | 2010-08-17 | 2012-05-23 | 南京大学 | Continuous flow reactor for high-concentration nitrogen-phosphorus wastewater and method thereof for treating wastewater |
| CN103193370A (en) * | 2013-03-30 | 2013-07-10 | 中山大学 | Phosphorus recovery device for excess sludge |
| CN104973716B (en) * | 2015-07-06 | 2017-12-05 | 重庆泰克环保科技股份有限公司 | A kind of phosphorus-containing wastewater purifier |
| CN104973723A (en) * | 2015-07-26 | 2015-10-14 | 安徽科技学院 | Device and method for recycling phosphorus by virtue of induced crystallization |
| CN105967378A (en) * | 2016-04-20 | 2016-09-28 | 中国科学院生态环境研究中心 | Device and method for synchronously recycling ammonia nitrogen and phosphorus from sewage |
| CN105906144A (en) * | 2016-05-06 | 2016-08-31 | 中国科学院生态环境研究中心 | Excrement sewage treatment equipment and method |
| CN106977066A (en) * | 2017-05-25 | 2017-07-25 | 宜兴华都琥珀环保机械制造有限公司 | Phosphorus recycling and processing device and method for sewage sludge |
| CN108751572A (en) * | 2018-05-17 | 2018-11-06 | 沈阳建筑大学 | A kind of wastewater treatment equipment and method of intensified denitrification and dephosphorization |
| CN108840722A (en) * | 2018-08-31 | 2018-11-20 | 四川深蓝环保科技有限公司 | A kind of device and method of sludge water hot filtrate recycling phosphate fertilizer |
| CN109928542A (en) * | 2019-03-26 | 2019-06-25 | 北京工业大学 | A kind of integrated apparatus and method for realizing ammonium magnesium phosphate efficient crystallization and separation of solid and liquid |
| CN110316865A (en) * | 2019-07-10 | 2019-10-11 | 李龙发 | A kind of textile process dyeing and printing sewage processing unit and method using buffering filtering |
| CN112645447B (en) * | 2020-11-30 | 2023-04-14 | 苏州科技大学 | System and process for recycling vivianite from phosphorus-containing wastewater |
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