CN103723874A - Device and method for recovering phosphorus from sewage - Google Patents
Device and method for recovering phosphorus from sewage Download PDFInfo
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- CN103723874A CN103723874A CN201410030397.9A CN201410030397A CN103723874A CN 103723874 A CN103723874 A CN 103723874A CN 201410030397 A CN201410030397 A CN 201410030397A CN 103723874 A CN103723874 A CN 103723874A
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Abstract
The invention relates to a technology and a device of environmental protection and resource recycling, and particularly relates to an induced crystallization reactor and solid-liquid separation device and a method for efficiently recovering phosphorous from the sewage. The induced crystallization reactor and solid-liquid separation device comprises a water inlet part, an agent adding part, an acidity regulating part, an aeration stirring part, an induced crystallization reaction part, a solid-liquid separation part and a crystal recovering part, wherein the induced crystallization reaction part is communicated with the solid-liquid separation part, and fully develops a seed crystal inducing function. According to the induced crystallization reactor and solid-liquid separation device and the method, phosphorus in the sewage is induced by using calcite as a seed crystal and is recovered in a hydroxyapatite (HAP) crystal manner, the recovered product can be directly applied to industry and agriculture so that sewage treatment, environmental protection and resource recycling are organically combined. In addition, the method has the characteristics of small occupation area, high recovering efficiency, good quality of the recycled product, less investment of equipment, and convenience in running and operation.
Description
Technical field
The present invention relates to environment protection and resource recycling technology and device, specifically a kind of induced crystallization reactor and equipment for separating liquid from solid and from sewage the method for high efficiente callback phosphorus.
Background technology
Nitrogen and phosphorus are the important factors that causes body eutrophication, wish (Liebig) the least factor law: phosphorus is to cause water eutrophication alga (C from Libiee
106h
263o
110n
16p) limiting factor of growth, there is strict restriction in many countries to its emission concentration.When the concentration of phosphorus reaches 0.015mg/L in water body, can cause algae rapid growth, often to water body discharge 1g phosphorus, can cause 950g(dry weight) growth of algae.The direct result of algae rapid growth is accelerated water body ager process exactly, makes water body lose the function of original fishery, tourism and drinking water source.In recent years, China's Main Lakes (as Chaohu, Taihu Lake and Dian Chi) generation body eutrophication even number of times of red tide is visible trend, phosphorus in these lakes more than 80% comes from sewage discharge, these sewage mainly come from town domestic sewage (accounting for 43.4%), livestock industry aquaculture wastewater (accounting for 20.5%), the composite wastewater (accounting for 17.2%) such as fertilizer, medicine and food service industry sewage (accounting for 18.9%) and other.
In addition, the phosphorus of occurring in nature mainly exists with forms such as phosphoric acid salt and guano rocks, after man-made recovery or natural erosion, with water runoff, importing sea is deposited in the settled layer at deep-sea, therefore the biochemical cycle of phosphorus is completely different from other element (as nitrogen), in biosphere, belong to individual event and flow and be difficult to regeneration, belong to non-renewable scarce resource.China's phosphate rock resource belongs to mineral products in imminent danger, can not meet one of Prospecting Target of The Main Minerals of national economic development needs after being listed in 2010.But, the phosphorus that contains " abundanter " in town domestic sewage, phosphorous composite fertilizer factory effluent, organophosphorus pesticide factory effluent, phosphorate rock mining, breeding wastewater, slaughterhouse wastewater and Meat processing waste water, recycling has a high potential.
Prior art is for the method that reclaims phosphorus from sewage:
(1) chemical precipitation method: form insoluble phosphate throw out by adding chemical agent, then remove the method by solid-liquid separation from sewage.Chemical precipitation method mainly contains calcium salt, molysite, aluminium salt, magnesium ammonium phosphate (MAP) precipitator method and calcium phosphate powder (HAP) precipitator method, and the shortcoming of this method is that the product quality reclaiming is poor, water ratio is high and can not directly apply to actual production.In addition, need throw out dehydration equipment, increased running cost.
(2) biological dephosphorization: the method is enriched in the phosphorus in sewage in dephosphorization microorganism cells to gather the form of phosphorus, then with the form of precipitating sludge, reclaim phosphorus, the shortcoming of this method is the high and heavy metal compound that contains various ways of precipitating sludge water ratio, is difficult to resource utilization recycling.In addition, the method is very easily subject to the impact of toxic substance in waste water, as organophosphorus pesticide wastewater.
(3) absorption method: the method utilization contains the amino phosphorus compound sorbing material that waits the phosphorus in sewage is adsorbed, but sorbing material loading capacity is limited and regeneration difficulty, therefore high, the troublesome poeration of cost and easily cause secondary pollution.
China Patent Publication No.: CN101602535, introduced " a kind of phosphorus reclaims crystallization reactor and phosphorus recovery method ", the method adopts ammoniomagnesium phosphate crystal method to reclaim the phosphorus in sewage, crystallization reaction district and settling region are combined, although cost is low, easy to operate, but phosphorus organic efficiency low (50%～60%), and it is high to go out water chaotic degree.
The recovery product that reclaims efficiently phosphorus up to now from sewage and obtained remains an insoluble technical problem.
Therefore invent and a kind ofly from sewage, reclaim that phosphorus product quality effective, that reclaim is high, cost is low, easy to operate novel method for environment protection (the particularly prevention and control of body eutrophication), to reduce cost of water treatment, improve the cycling and reutilization efficiency of scarce resource be the very important task of field of water treatment.
Summary of the invention
The object of this invention is to provide a kind of novel method that product quality is high, cost is low, easy to operate that phosphorus is effective, reclaim that reclaims from sewage.
The object of the present invention is achieved like this:
(1) to the interior interpolation crystal seed 13 of induced crystallization reactor 7;
(2) utilize lift pump 4 that the phosphorus-containing wastewater in inlet chest 1 is pumped in induced crystallization reactor, utilize pump 6 to add NaOH solution 3, regulate pH >=8.5;
(3) open aerator 8, utilize aeration head 9 to carry out blast aeration 1.5L/min;
(4) utilize pump 5 to add CaCl
2solution 2 is in induced crystallization reactor;
(5) when crystal seed and the crystallized product that adheres to thereof flow to 16 position, buffer zone of solid-liquid separator 15, speed moment declines, and turns back to again in induced crystallization reactor, thereby realize solid-liquid separation under the effect of gravity;
(6) sewage of removing after phosphorus enters water tank 19 by exhalant region 17, and in water outlet, phosphorus concentration meets every profession and trade emission standard;
(7) when crystal seed adsorbs when saturated, stop aeration, quiescent setting 30min, opens the emptying mouth of pipe 20, pulls out latch 11,12 after emptying solution, takes out back up pad 10, the crystallized product that reclaims crystal seed and adhere to.
The described crystal seed of step (1) is calcite, particle diameter 0.15～0.30mm, and dosage is 40mg/L.
The described NaOH strength of solution of step (2) is, 0.1mol/L.
The described CaCl of step (3)
2solution according to Ca:P mol ratio be 2.0 determine.
Main points of the present invention are:
(1) increase the solid phase crystal seed calcite similar to HAP structure, surface properties, characterization of adsorption and chemical constitution, can form, accelerate crystal growth, shorten crystallization time by induced nuclei, guaranteed that induced crystallization reclaims the effect of phosphorus.As configurational ion (Ca in solution
2+, OH
-and PO
4 3-) while being enriched in seed surface, the metastable state that makes local ion Enrichment (formation enriched layer) destroy configurational ion because of crystal seed makes ionic product be greater than the long-pending crystalline state that produces rapidly of concentration.
(2) at induced crystallization reactor flank, increase equipment for separating liquid from solid, guarantee that water outlet concentration of suspension is up to standard.In addition, buffer zone is set in equipment for separating liquid from solid flow rate of liquid moment is reduced, then under action of gravity, realize automatic solid-liquid separation.
Specific embodiment of the invention measure is:
(1) to adding particle diameter 0.15～0.30mm in induced crystallization reactor, be calcite seed crystal, dosage is 40mg/L.Structure, surface properties, characterization of adsorption and the chemical constitution of calcite seed crystal are similar to HAP, and its effect is to provide crystallization carrier, accelerate crystallization reaction, improve crystallization effect.
(2) phosphorus-containing wastewater enters in induced crystallization reactor, carries out blast aeration stirring, and aeration speed is 1.5L/min.The Main Function of aerator has 2 points: the one, and make crystal seed be suspended state, fully contact with the configurational ion in sewage, induction HAP crystallization is in seed surface; The 2nd, the CO in aeration stripping sewage
2, improve the pH of solution, can save the consumption of NaOH solution.
(3) according to Ca:P mol ratio, be that 2:1 determines CaCl
2strength of solution, utilizes pump by CaCl
2solution is continuously pumped in induced crystallization reactor, and flow is 0.5L/h.
(4) crystal seed absorption saturated after, stop into water, stop aeration, quiescent setting 30min, the crystallized product HAP that takes out calcite seed crystal and adhere to.
(5) in equipment for separating liquid from solid water outlet, phosphorus concentration meets every profession and trade emission standard.In addition, induced crystallization product main component is HAP, can directly apply to industrial or agricultural and produce.
The present invention increases equipment for separating liquid from solid at induced crystallization reactor flank, sets gradually:
Water inlet portion: inlet chest 1, intake pump 4;
Dosing part: CaCl
2 solution reserve tank 2, enter CaCl
2solution pump 5;
Acidity adjustment part: NaOH solution reserve tank 3, enter NaOH solution pump 6, pH determinator 14;
Aeration agitation part: aerator 8, aeration head 9;
Induced crystallization reactive moieties: induced crystallization reactor 7, crystal seed 13;
Solid-liquid separation part: equipment for separating liquid from solid 15, buffer zone 16, exhalant region 17, support 18, water tank 19;
Crystal recovery part: back up pad 10, latch 11, latch 12, the emptying mouth of pipe 20;
Wherein, induced crystallization reactor 7 communicates with equipment for separating liquid from solid 15, and the crystal seed 13 that buffer zone 16 settles down is turned back in induced crystallization reactor 7 again, continues induction HAP crystallization.
The present invention is applicable to town domestic sewage, phosphorous composite fertilizer production waste, organophosphorus pesticide production waste, phosphorate rock mining, aquaculture wastewater, Meat processing sewage and composite wastewater etc., with a wide range of applications.
The present invention compares with domestic and international existing similar technology, its creativeness be following some:
1, add the calcite similar with crystallized product HAP structure, surface properties, characterization of adsorption and chemical constitution as crystal seed induction HAP rapid growth of crystal, thereby improve phosphorus recovering effect;
2, at induced crystallization reactor flank, increase equipment for separating liquid from solid, improve solid-liquid separation effect, thereby improve effluent quality;
3, adopt blast aerator, both can make crystal seed be suspended state and make it fully to contact with the configurational ion in sewage, the CO in again can stripping sewage
2improve sewage pH, thereby reduced medicament usage quantity, saved cost.
The present invention is with the difference of domestic and international prior art:
1, add calcite seed crystal, play induction HAP crystallization, strengthened the recovering effect of phosphorus, and do not adopted chemical precipitation method;
2, induced crystallization reactor flank increases equipment for separating liquid from solid, improves solid-liquid separation effect, and does not adopt crystallization reaction, solid-liquid separation in same device;
3, adopt blast aeration to stir, and do not adopt mechanical stirring.
The invention has the beneficial effects as follows:
Adopt calcite as crystal seed rapid induction HAP crystallization, strengthen phosphorus recovering effect, improve phosphorus and reclaim product quality, phosphorus organic efficiency is high; At induced crystallization reactor flank, increase equipment for separating liquid from solid, improve solid-liquid separation effect, reduce concentration of suspension in water outlet, below 10mg/L; Employing blast aeration is stirred, and reduces NaOH solution consumption amount, reduces running cost; Phosphorus in sewage reclaims with phosphorus ore HAP crystalline form, can directly apply to industrial or agricultural and produce, and sewage disposal, environment protection and scarce resource resource utilization recycling are organically combined.By this induced crystallization reactor, from sewage, reclaim phosphorus and have that floor space is little, organic efficiency is high, reclaim product quality better, the few and operation feature easily of facility investment.
Accompanying drawing explanation
Fig. 1 is the operational process schematic diagram that reclaims phosphorus from sewage of the present invention.
Number in the figure is as follows: 1, inlet chest; 2, CaCl
2solution reserve tank; 3, NaOH solution reserve tank; 4, intake pump; 5, enter CaCl
2solution pump; 6, enter NaOH solution pump; 7, induced crystallization reactor; 8, aerator; 9, aeration head; 10, back up pad; 11, latch; 12, latch; 13, crystal seed; 14, pH determinator; 15, equipment for separating liquid from solid; 16, buffer zone; 17, exhalant region; 18, support; 19, water tank; 20, the emptying mouth of pipe.
Fig. 2 is example 1 operation result figure of the present invention.
Number in the figure is as follows: 1, phosphorous recovery coordinate axis, %; 2, working time coordinate axis, day; 3, water outlet phosphorus concentration coordinate axis, mg/L; 4, tp removal rate; 5, water outlet phosphorus concentration
Fig. 3 is example 2 operation result figure of the present invention.
Number in the figure is as follows: 1, phosphorous recovery coordinate axis, %; 2, working time coordinate axis, day; 3, Inlet and outlet water phosphorus concentration coordinate axis, mg/L; 4, tp removal rate; 5, water inlet water phosphorus concentration; 6, water outlet phosphorus concentration.
Fig. 4 is example 3 operation result figure of the present invention.
Number in the figure is as follows: 1, phosphorous recovery coordinate axis, %; 2, working time coordinate axis, day; 3, Inlet and outlet water phosphorus concentration coordinate axis, mg/L; 4, tp removal rate; 5, water inlet water phosphorus concentration; 6, water outlet phosphorus concentration.
Embodiment
Below by embodiment, the present invention will be further described.
Example 1
From the phosphorus-containing wastewater of laboratory configuration, use this induced crystallization reactor to reclaim phosphorus.It is 30cm that experiment adopts induced crystallization height for reactor, internal diameter is 16cm, cubic capacity is 6L, useful volume is 5L, and solid-liquid separation useful volume 1.5L processes water yield 1.67L/h, hydraulic detention time is 3h, sewage, from the phosphorus-containing wastewater of laboratory configuration, adds the potassium primary phosphate of 43.9mg in every premium on currency, it is 10mg/L containing phosphorus concentration.
Get this phosphorus-containing wastewater 600L, add calcite seed crystal 3g, with NaOH solution, regulating pH is 8.8, by Ca:P mol ratio, is that 2:1 enters CaCl
2solution, flow is 0.5L/h, aeration speed is 1.5L/min.Monitoring water outlet 15 days, measures phosphorus concentration in water outlet every day continuously, and test result is shown in Fig. 2.
According to experimental result induced crystallization reactor to this phosphor in sewage rate of recovery more than 95%, below water outlet phosphorus concentration 0.5mg/L, reach < < GB8978-1996 integrated wastewater discharge standard > >, meet design requirement.
Example 2
From town domestic sewage, use this induced crystallization reactor to reclaim phosphorus.At certain sewage treatment plant inflow mouth, get sanitary sewage 1.2m
3, process water yield 3.30L/h, hydraulic detention time is 3h, adds calcite seed crystal 5g, with NaOH solution, regulating pH is 8.8, by Ca:P mol ratio, is that 2:1 enters CaCl
2solution, flow is 0.5L/h, aeration speed is 1.5L/min.Monitoring Inlet and outlet water 15 days, measures phosphorus concentration in Inlet and outlet water every day continuously, and test result is shown in Fig. 3.
According to experimental result, in water inlet, phosphorus concentration is 6.2～8.3mg/L, induced crystallization reactor to this phosphor in sewage rate of recovery more than 93%, in water outlet below phosphorus concentration 0.5mg/L, reach < < GB18918-2002 urban wastewater treatment firm pollutant emission standard > >, meet design requirement.
Example 3
From breeding wastewater, use this induced crystallization reactor to reclaim phosphorus.At certain pig farm water outlet, get breeding wastewater 0.3m
3, process water yield 0.85L/h, hydraulic detention time is 3h, adds calcite seed crystal 2g, with NaOH solution, regulating pH is 8.8, by Ca:P mol ratio, is that 2:1 enters CaCl
2solution, flow is 0.5L/h, aeration speed is 1.5L/min.Monitoring Inlet and outlet water 15 days, measures phosphorus concentration in Inlet and outlet water every day continuously, and test result is shown in Fig. 3.
According to experimental result, in water inlet, phosphorus concentration is 38.8～45.9mg/L, induced crystallization reactor to this phosphor in sewage rate of recovery more than 83%, in water outlet below phosphorus concentration 8.0mg/L, reach < < GB18596-2001 livestock and poultry breeding industry pollutant emission standard > >, meet design requirement
No matter by above-mentioned example, can be found out, be composite wastewater, town domestic sewage or aquaculture wastewater, and the present invention, for adopting induced crystallization to reclaim phosphorus from sewage, has good recovering effect.
Above-described embodiment is only preference of the present invention, is not used for limiting the present invention, all within principle of the present invention, and that does is anyly equal to alternative, modifications and variations, all within protection scope of the present invention.
Claims (5)
1. induced crystallization reactor and a disjunctor equipment for separating liquid from solid, described reactor and equipment for separating liquid from solid comprise:
Water inlet portion: inlet chest 1, intake pump 4;
Dosing part: CaCl
2solution reserve tank 2, enter CaCl
2solution pump 5;
Acidity adjustment part: NaOH solution reserve tank 3, enter NaOH solution pump 6, pH determinator 14;
Aeration agitation part: aerator 8, aeration head 9;
Induced crystallization reactive moieties: induced crystallization reactor 7, crystal seed 13;
Solid-liquid separation part: equipment for separating liquid from solid 15, buffer zone 16, exhalant region 17, support 18, water tank 19;
Crystal recovery part: back up pad 10, latch 11, latch 12, the emptying mouth of pipe 20;
Wherein, induced crystallization reactor 7 communicates with equipment for separating liquid from solid 15, and the crystal seed 13 that buffer zone 16 settles down is turned back in induced crystallization reactor 7 again, continues induction HAP crystallization.
2. from sewage, reclaim a phosphorus, induced crystallization reactor according to claim 1 and disjunctor equipment for separating liquid from solid, said method comprising the steps of:
(1) to the interior interpolation crystal seed 13 of induced crystallization reactor 7;
(2) utilize lift pump 4 that the phosphorus-containing wastewater in inlet chest 1 is pumped in induced crystallization reactor, utilize pump 6 to add NaOH solution 3, regulate pH >=8.5;
(3) open aerator 8, utilize aeration head 9 to carry out blast aeration 1.5L/min;
(4) utilize pump 5 to add CaCl
2solution 2 is in induced crystallization reactor;
(5) when crystal seed and the crystallized product that adheres to thereof flow to 16 position, buffer zone of solid-liquid separator 15, speed moment declines, and turns back to again in induced crystallization reactor, thereby realize solid-liquid separation under the effect of gravity;
(6) sewage of removing after phosphorus enters water tank 19 by exhalant region 17, and in water outlet, phosphorus concentration meets every profession and trade emission standard;
(7) when crystal seed adsorbs when saturated, stop aeration, quiescent setting 30min, opens the emptying mouth of pipe 20, pulls out latch 11,12 after emptying solution, takes out back up pad 10, the crystallized product that reclaims crystal seed and adhere to.
3. the method that reclaims according to claim 2 phosphorus from sewage, is characterized in that: the described crystal seed of step (1) is calcite, particle diameter 0.15～0.30mm, and dosage is 40mg/L.
4. the method that reclaims according to claim 2 phosphorus from sewage, is characterized in that: the described NaOH strength of solution of step (2) is, 0.1mol/L.
5. the method that reclaims according to claim 2 phosphorus from sewage, is characterized in that: the described CaCl of step (3)
2solution according to Ca:P mol ratio be 2.0 determine.
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|---|---|---|---|
| CN201410030397.9A CN103723874A (en) | 2014-01-22 | 2014-01-22 | Device and method for recovering phosphorus from sewage |
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|---|---|---|---|
| CN201410030397.9A CN103723874A (en) | 2014-01-22 | 2014-01-22 | Device and method for recovering phosphorus from sewage |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103951112A (en) * | 2014-05-13 | 2014-07-30 | 中国科学院城市环境研究所 | Method for removing heavy metals in wastewater phosphorus recovery product |
| 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 |
| CN108585271A (en) * | 2018-05-08 | 2018-09-28 | 安徽科技学院 | A method of recycling P elements from sewage |
| CN110395822A (en) * | 2019-08-21 | 2019-11-01 | 长沙理工大学 | The recovery method of phosphorus in a kind of the secondary effluent of the sewage plant |
| CN110550748A (en) * | 2019-09-19 | 2019-12-10 | 长沙理工大学 | Method and device for removing hardness in water |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004290862A (en) * | 2003-03-27 | 2004-10-21 | Ebara Corp | Method and apparatus for recovering nitrogen and phosphorus |
| JP2005040739A (en) * | 2003-07-24 | 2005-02-17 | Unitika Ltd | Phosphate-containing wastewater treatment method |
| CN1597545A (en) * | 2004-08-20 | 2005-03-23 | 清华大学 | Phosphorus containing waste water treatment method and its application of recovered phosphorus product |
| CN1792855A (en) * | 2005-11-17 | 2006-06-28 | 湖南大学 | Process for treating waste water of high concentration containing phosphorus |
| CN102491602A (en) * | 2011-12-20 | 2012-06-13 | 东南大学 | Sequencing batch domestic sewage treatment method for forcibly denitrifying and dephosphorizing, and recycling phosphorus |
-
2014
- 2014-01-22 CN CN201410030397.9A patent/CN103723874A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004290862A (en) * | 2003-03-27 | 2004-10-21 | Ebara Corp | Method and apparatus for recovering nitrogen and phosphorus |
| JP2005040739A (en) * | 2003-07-24 | 2005-02-17 | Unitika Ltd | Phosphate-containing wastewater treatment method |
| CN1597545A (en) * | 2004-08-20 | 2005-03-23 | 清华大学 | Phosphorus containing waste water treatment method and its application of recovered phosphorus product |
| CN1792855A (en) * | 2005-11-17 | 2006-06-28 | 湖南大学 | Process for treating waste water of high concentration containing phosphorus |
| CN102491602A (en) * | 2011-12-20 | 2012-06-13 | 东南大学 | Sequencing batch domestic sewage treatment method for forcibly denitrifying and dephosphorizing, and recycling phosphorus |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103951112A (en) * | 2014-05-13 | 2014-07-30 | 中国科学院城市环境研究所 | Method for removing heavy metals in wastewater phosphorus recovery product |
| CN103951112B (en) * | 2014-05-13 | 2016-06-01 | 中国科学院城市环境研究所 | A kind of method removing heavy metal in phosphorus in waste water recovery product |
| 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 |
| CN108585271A (en) * | 2018-05-08 | 2018-09-28 | 安徽科技学院 | A method of recycling P elements from sewage |
| CN110395822A (en) * | 2019-08-21 | 2019-11-01 | 长沙理工大学 | The recovery method of phosphorus in a kind of the secondary effluent of the sewage plant |
| CN110550748A (en) * | 2019-09-19 | 2019-12-10 | 长沙理工大学 | Method and device for removing hardness in water |
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Application publication date: 20140416 |