CN103723832A - Method and device for improving phosphorus removal effect in water by constructed wetland filling material - Google Patents
Method and device for improving phosphorus removal effect in water by constructed wetland filling material Download PDFInfo
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- CN103723832A CN103723832A CN201310681065.2A CN201310681065A CN103723832A CN 103723832 A CN103723832 A CN 103723832A CN 201310681065 A CN201310681065 A CN 201310681065A CN 103723832 A CN103723832 A CN 103723832A
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Abstract
The invention relates to a method and device for improving phosphorus removal effect in water by a constructed wetland filling material. Waste water flows into an undercurrent constructed wetland through a water inlet, and then flows through a plurality of movable filling material areas and a plurality of fixed filling material areas in sequence, and the treated water is discharged from a water outlet. The movable filling material areas and the fixed filling materials areas are fill with solidified zirconium-loaded zeolite finished products; the movable filling material areas and the fixed filling materials areas are arranged alternately, and, the water flows through the movable filling material areas from the bottom to the top, and flows through the fixed filling materials areas from the top to the bottom in the constructed wetland. Reeds are planted at the tops of the fixed filling materials, and outlets used for adsorbing saturated filling materials are formed in the lower parts of the movable filling material areas. The phosphorus removal effect in water by the constructed wetland filling material can be greatly improved by adopting the zirconium-loaded zeolite; the filling material can be conveniently loaded and unloaded by arranging the movable filling material areas and the fixed filling materials areas; moreover, the disruption to the ecosystem in the constructed wetland system can be avoided when the filling materials are replaced, the phosphorus removal effect in the undercurrent constructed wetland is improved, and the disruption to the botanical system in the constructed wetland can be avoided when the filling materials are replaced.
Description
Technical field
The present invention relates to a kind of method and the device thereof of Performance of Constructed Wetlands Substrates to phosphorus removal effect in water that improve.
Background technology
Artificial wet land system is a comprehensive ecosystem, artificial swamp is filled with different fillers according to the difference of processing pollutent, plant different types of purifying plant, physics, chemistry and biological action by filler, plant and microorganism complete jointly to dirty water purification.
In artificial wet land system, filler has offered the carrier of microorganic adhesion, the plant of system is played to fixing effect simultaneously, is one of core in this system; Filler plays important effect for nutritive substances such as nitrogen phosphorus in absorption sewage simultaneously.Conventional Performance of Constructed Wetlands Substrates has gravel, zeolite, slag, Wingdale, slag etc., and its mesolite inside is full of trickle hole and passage, has good adsorptivity, and phosphorus is had to good adsorptive power.Natural zeolite has higher water-content and silica alumina ratio, contains impurity particle simultaneously, makes its loading capacity on the low side, has limited its exploitation.Although and synthetic molecular sieve purity is high, cost is also high.Therefore,, by natural zeolite is carried out to modification, when obtaining high-performance sorbing material, also saved investment.
In addition, filler in artificial swamp is when Removal of Phosphorus in Wastewater, absorption through certain hour, just there will be the phenomenon that filling adsorption is saturated, need to change filler, in current artificial wet land system, the replacing of filler all adopts the form of integral replacing, can destroy the ecosystem structure of artificial wet land system like this, reduce the removal effect of artificial swamp to water pollutant, therefore, urgently change the replacement form of artificial swamp.
Summary of the invention
The object of the present invention is to provide a kind of method and the device thereof of Performance of Constructed Wetlands Substrates to phosphorus removal effect in water that improve, thereby improve the removal effect of artificial wet land system to phosphorus.
The method of the raising Performance of Constructed Wetlands Substrates that the present invention proposes to phosphorus removal effect in water, concrete steps are as follows:
(1) filler pre-treatment: the zeolite of pulverizing is scattered in distilled water, soaks with the hydrochloric acid soln of 0.3-0.8 mol/L, first place it on magnetic stirring apparatus and carry out strong stirring 1-4 hour, carry out solid-liquid separation after standing 12-36 hour; Then zeolite is placed on to drying in oven standby;
(2) zirconium load: pretreated zeolite is joined to the zirconyl chloride solution of 10-30g/L with the ratio of solid-to-liquid ratio 1:15-1:5, be then placed on magnetic stirring apparatus solid-liquid separation after strong stirring 6-18 hour, then zeolite is placed on to drying in oven;
(3) filler solidifies: the zeolite after load zirconium is dried and is placed on tubular type kiln roasting, and maturing temperature is 300-800 ℃, and roasting time is 1-3 hour, passes into nitrogen in roasting process, and nitrogen intake is 30-80ml/min, gets final product to obtain year zirconium zeolite finished product;
(4) using what solidify, carry zirconium zeolite finished product as filler, according to size distribution, fill out cloth in drowned flow artificial wet land;
(5) phosphorus-containing wastewater enters from drowned flow artificial wet land water-in, the activity packing area of flowing through successively, fixing packing area, and finally, from water outlet water outlet, phosphorus-containing wastewater is purified;
(6) after filling adsorption is saturated, from adsorbing the outlet of saturated filler, unloads part and adsorb saturated filler, from top, movable packing area, add new filler.
In the present invention, need that zeolite is put into ball mill and pulverize before filler pre-treatment, the particle diameter after grinding is controlled at 5-50 order, preferably 20 orders.
In the present invention, described in step (1), the concentration of hydrochloric acid soln is 0.5-0.6 mol/L, and hydrochloric acid soln is 0.5 mol/L preferably.
In the present invention, the strong stirring time of zeolite described in step (1) on magnetic stirring apparatus is 1.5-2.5 hour, preferably 2 hours; Time of repose is 22-26 hour, preferably 24 hours; Zeolite is 100-110 ℃ in the temperature of drying in oven, preferably 105 ℃.
In the present invention, in step (2), need the ratio with solid-to-liquid ratio 1:12-1:9 by pretreated zeolite to add, the ratio of preferred 1:10, the concentration of zirconyl chloride solution is 15-25g/L, on magnetic stirring apparatus, the time of strong stirring is 10-14 hour, preferably 12 hours; Zeolite is controlled at 100-110 ℃ in the temperature of drying in oven, preferably 105 ℃.
In the present invention, described in step (3), maturing temperature is 450-550 ℃, and preferably 500 ℃, roasting time is 1.5-2.5 hour, preferably 2 hours; During roasting, pass into nitrogen, nitrogen intake is 45-55ml/min, preferably 50ml/min.
A kind of device of Performance of Constructed Wetlands Substrates to phosphorus removal effect in water that improve in the present invention, comprise movable packing area, fixedly packing area and drowned flow artificial wet land, drowned flow artificial wet land becomes some movable packing areas and fixing packing area by baffle for separating, movable packing area and fixedly packing area are alternately to be arranged, and in artificial swamp the direction of current for from bottom to top by movable packing area, pass through fixedly packing area from top to bottom; Drowned flow artificial wet land one side lower part is provided with water-in, and opposite side top is provided with water outlet; Bottom, movable packing area arranges the saturated filler outlet of absorption; Fixedly the wetland plants such as reed are planted at top, packing area; The filler of filling in movable packing area and packing area is and carries zirconium zeolite finished product.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1, the present invention is carried zirconium by zeolite and can greatly be improved the removal effect of Performance of Constructed Wetlands Substrates to phosphorus in water;
2, the present invention is by arranging movable packing area and fixing packing area, facilitate the handling of filler, destruction to the artificial wet land system ecosystem simultaneously while avoiding replacement, the effect to phosphorus of raising underflow type artificial wet land, avoids the destruction of replacement to constructed wetland plant system;
3, the present invention is simple in structure, manufactures easy for installation.
Accompanying drawing explanation
Fig. 1 is sewage treatment technology process schematic diagram of the present invention.
Fig. 2 is structural representation of the present invention.
Number in the figure: 1 water-in, 2 water outlets, 3 movable packing areas, 4 are packing area, 5 drowned flow artificial wet lands, the saturated filler outlet of 6 absorption, 7 dividing plates, 8 new filler opening for feeds, 9 plant growing districts fixedly.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further illustrated.
Embodiment 1: referring to Fig. 1, Fig. 2, waste water enters drowned flow artificial wet land 5 from water-in 1, and through some groups of activity packing areas 3, fixing packing area 4, the water after processing is from water outlet 2 discharges successively.Described movable packing area 3 and the filler that fixedly fill packing area 4 are above-mentioned curing year zirconium zeolite finished product; Movable packing area 3 and fixedly packing area 4 are alternately to be arranged, and in artificial swamp the direction of current for from bottom to top by movable packing area 3, pass through fixedly packing area 4 from top to bottom; Movable packing area 3 and dividing plate 7 is fixedly set between packing area 4.Above-mentioned fixedly packing area 4 top plantation reeds, 3 bottoms, movable packing area arrange the saturated filler outlet 6 of absorption.When filling adsorption reaches breakthrough point, first the saturated filler self filler outlet 6 of absorption is drawn off, the more above-mentioned curing zirconium zeolite finished product that carries is added from new filler opening for feed 8.Fixedly the wetland plants such as reed are planted in 9 kinds, the plant growing district at 4 tops, packing area.
Embodiment 1: undressed zeolite is filled out to cloth in artificial swamp bed; Starting point concentration is that the phosphorus-containing wastewater of 20mg/L enters from artificial swamp water-in, the activity packing area of flowing through successively, fixing packing area, and finally from water outlet water outlet, in phosphorus-containing wastewater, the clearance of phosphorus is 63%.
Embodiment 2: 1. filler pre-treatment: zeolite is put into ball mill and pulverize, particle diameter 20 orders after pulverizing, the zeolite after grinding adopts the hydrochloric acid soln of 0.5 mol/L to soak, then the 2 hours strong stirring time on magnetic stirring apparatus, after standing 24 hours, oven for drying at 105 ℃.2. zirconium load: the ratio with solid-to-liquid ratio 1:10 joins in the zirconyl chloride solution of 20g/L by pretreated zeolite again, and strong stirring is 12 hours on magnetic stirring apparatus, then dries under 105 ℃ of conditions in baking oven.3. filler solidifies: the zeolite after load zirconium is dried and is placed on tubular type kiln roasting, 500 ℃ of maturing temperatures, roasting time 2 hours; During roasting, passing into nitrogen amount is 50ml/min.4. by above-mentioned curing year zirconium zeolite finished product, fill out cloth in artificial swamp bed; 5. the phosphorus-containing wastewater that starting point concentration is 20mg/L enters from artificial swamp water-in, the activity packing area of flowing through successively, fixing packing area, and finally from water outlet water outlet, in phosphorus-containing wastewater, the clearance of phosphorus reaches more than 98%.
Embodiment 3: 1. filler pre-treatment: zeolite is put into ball mill and pulverize, particle diameter 30 orders after pulverizing, the zeolite after grinding adopts the hydrochloric acid soln of 0.5 mol/L to soak, then the 2 hours strong stirring time on magnetic stirring apparatus, after standing 24 hours, oven for drying at 105 ℃.2. zirconium load: the ratio with solid-to-liquid ratio 1:10 joins in the zirconyl chloride solution of 20g/L by pretreated zeolite again, and strong stirring is 12 hours on magnetic stirring apparatus, then dries under 105 ℃ of conditions in baking oven.3. filler solidifies: the zeolite after load zirconium is dried and is placed on tubular type kiln roasting, 500 ℃ of maturing temperatures, roasting time 2 hours; During roasting, passing into nitrogen amount is 50ml/min.4. by above-mentioned curing year zirconium zeolite finished product, fill out cloth in artificial swamp bed; 5. the phosphorus-containing wastewater that starting point concentration is 20mg/L enters from artificial swamp water-in, the activity packing area of flowing through successively, fixing packing area, and finally from water outlet water outlet, in phosphorus-containing wastewater, the clearance of phosphorus reaches more than 99%.
Embodiment 4: 1. filler pre-treatment: zeolite is put into ball mill and pulverize, particle diameter 40 orders after pulverizing, the zeolite after grinding adopts the hydrochloric acid soln of 0.5 mol/L to soak, then the 2 hours strong stirring time on magnetic stirring apparatus, after standing 24 hours, oven for drying at 105 ℃.2. zirconium load: the ratio with solid-to-liquid ratio 1:10 joins in the zirconyl chloride solution of 20g/L by pretreated zeolite again, and strong stirring is 12 hours on magnetic stirring apparatus, then dries under 105 ℃ of conditions in baking oven.3. filler solidifies: the zeolite after load zirconium is dried and is placed on tubular type kiln roasting, 500 ℃ of maturing temperatures, roasting time 2 hours; During roasting, passing into nitrogen amount is 50ml/min.4. by above-mentioned curing year zirconium zeolite finished product, fill out cloth in artificial swamp bed; 5. the phosphorus-containing wastewater that starting point concentration is 20mg/L enters from artificial swamp water-in, the activity packing area of flowing through successively, fixing packing area, and finally from water outlet water outlet, in phosphorus-containing wastewater, the clearance of phosphorus reaches more than 99%.
Embodiment 5: 1. filler pre-treatment: zeolite is put into ball mill and pulverize, particle diameter 20 orders after pulverizing, the zeolite after grinding adopts the hydrochloric acid soln of 0.5 mol/L to soak, then the 2 hours strong stirring time on magnetic stirring apparatus, after standing 24 hours, oven for drying at 105 ℃.2. zirconium load: the ratio with solid-to-liquid ratio 1:10 joins in the zirconyl chloride solution of 20g/L by pretreated zeolite again, and strong stirring is 12 hours on magnetic stirring apparatus, then dries under 105 ℃ of conditions in baking oven.3. filler solidifies: the zeolite after load zirconium is dried and is placed on tubular type kiln roasting, 400 ℃ of maturing temperatures, roasting time 2 hours; During roasting, passing into nitrogen amount is 50ml/min.4. by above-mentioned curing year zirconium zeolite finished product, fill out cloth in artificial swamp bed; 5. the phosphorus-containing wastewater that starting point concentration is 20mg/L enters from artificial swamp water-in, the activity packing area of flowing through successively, fixing packing area, and finally from water outlet water outlet, in phosphorus-containing wastewater, the clearance of phosphorus reaches more than 98%.
Embodiment 6: 1. filler pre-treatment: zeolite is put into ball mill and pulverize, particle diameter 30 orders after pulverizing, the zeolite after grinding adopts the hydrochloric acid soln of 0.5 mol/L to soak, then the 2 hours strong stirring time on magnetic stirring apparatus, after standing 24 hours, oven for drying at 105 ℃.2. zirconium load: the ratio with solid-to-liquid ratio 1:10 joins in the zirconyl chloride solution of 20g/L by pretreated zeolite again, and strong stirring is 12 hours on magnetic stirring apparatus, then dries under 105 ℃ of conditions in baking oven.3. filler solidifies: the zeolite after load zirconium is dried and is placed on tubular type kiln roasting, 600 ℃ of maturing temperatures, roasting time 2 hours; During roasting, passing into nitrogen amount is 50ml/min.4. by above-mentioned curing year zirconium zeolite finished product, fill out cloth in artificial swamp bed; 5. the phosphorus-containing wastewater that starting point concentration is 20mg/L enters from artificial swamp water-in, the activity packing area of flowing through successively, fixing packing area, and finally from water outlet water outlet, in phosphorus-containing wastewater, the clearance of phosphorus reaches more than 99%.
Embodiment 7: 1. filler pre-treatment: zeolite is put into ball mill and pulverize, particle diameter 40 orders after pulverizing, the zeolite after grinding adopts the hydrochloric acid soln of 0.5 mol/L to soak, then the 2 hours strong stirring time on magnetic stirring apparatus, after standing 24 hours, oven for drying at 105 ℃.2. zirconium load: the ratio with solid-to-liquid ratio 1:10 joins in the zirconyl chloride solution of 20g/L by pretreated zeolite again, and strong stirring is 12 hours on magnetic stirring apparatus, then dries under 105 ℃ of conditions in baking oven.3. filler solidifies: the zeolite after load zirconium is dried and is placed on tubular type kiln roasting, 700 ℃ of maturing temperatures, roasting time 2 hours; During roasting, passing into nitrogen amount is 50ml/min.4. by above-mentioned curing year zirconium zeolite finished product, fill out cloth in artificial swamp bed; 5. the phosphorus-containing wastewater that starting point concentration is 20mg/L enters from artificial swamp water-in, the activity packing area of flowing through successively, fixing packing area, and finally from water outlet water outlet, in phosphorus-containing wastewater, the clearance of phosphorus reaches more than 99%.
Embodiment 8: 1. filler pre-treatment: zeolite is put into ball mill and pulverize, particle diameter 40 orders after pulverizing, the zeolite after grinding adopts the hydrochloric acid soln of 0.5 mol/L to soak, then the 2 hours strong stirring time on magnetic stirring apparatus, after standing 24 hours, oven for drying at 105 ℃.2. zirconium load: the ratio with solid-to-liquid ratio 1:10 joins in the zirconyl chloride solution of 20g/L by pretreated zeolite again, and strong stirring is 12 hours on magnetic stirring apparatus, then dries under 105 ℃ of conditions in baking oven.3. filler solidifies: the zeolite after load zirconium is dried and is placed on tubular type kiln roasting, 500 ℃ of maturing temperatures, roasting time 3 hours; During roasting, passing into nitrogen amount is 50ml/min.4. by above-mentioned curing year zirconium zeolite finished product, fill out cloth in artificial swamp bed; 5. the phosphorus-containing wastewater that starting point concentration is 20mg/L enters from artificial swamp water-in, the activity packing area of flowing through successively, fixing packing area, and finally from water outlet water outlet, in phosphorus-containing wastewater, the clearance of phosphorus reaches more than 99%.
Embodiment 9: 1. filler pre-treatment: zeolite is put into ball mill and pulverize, particle diameter 20 orders after pulverizing, the zeolite after grinding adopts the hydrochloric acid soln of 0.5 mol/L to soak, then the 2 hours strong stirring time on magnetic stirring apparatus, after standing 24 hours, oven for drying at 105 ℃.2. zirconium load: the ratio with solid-to-liquid ratio 1:10 joins in the zirconyl chloride solution of 20g/L by pretreated zeolite again, and strong stirring is 12 hours on magnetic stirring apparatus, then dries under 105 ℃ of conditions in baking oven.3. filler solidifies: the zeolite after load zirconium is dried and is placed on tubular type kiln roasting, 500 ℃ of maturing temperatures, roasting time 3 hours; During roasting, passing into nitrogen amount is 50ml/min.4. by above-mentioned curing year zirconium zeolite finished product, fill out cloth in artificial swamp bed; 5. the phosphorus-containing wastewater that starting point concentration is 20mg/L enters from artificial swamp water-in, the activity packing area of flowing through successively, fixing packing area, and finally from water outlet water outlet, in phosphorus-containing wastewater, the clearance of phosphorus reaches more than 98%.
Claims (7)
1. improve the method for Performance of Constructed Wetlands Substrates to phosphorus removal effect in water, it is characterized in that concrete steps are as follows:
(1) filler pre-treatment: the zeolite of pulverizing is scattered in distilled water, soaks with the hydrochloric acid soln of 0.3-0.8 mol/L, first place it on magnetic stirring apparatus and carry out strong stirring 1-4 hour, carry out solid-liquid separation after standing 12-36 hour; Then zeolite is placed on to drying in oven standby;
(2) zirconium load: pretreated zeolite is joined to the zirconyl chloride solution of 10-30g/L with the ratio of solid-to-liquid ratio 1:15-1:5, be then placed on magnetic stirring apparatus solid-liquid separation after strong stirring 6-18 hour, then zeolite is placed on to drying in oven;
(3) filler solidifies: the zeolite after load zirconium is dried and is placed on tubular type kiln roasting, and maturing temperature is 300-800 ℃, and roasting time is 1-3 hour, passes into nitrogen in roasting process, and nitrogen intake is 30-80ml/min, gets final product to obtain year zirconium zeolite finished product;
(4) using what solidify, carry zirconium zeolite finished product as filler, according to size distribution, fill out cloth in drowned flow artificial wet land;
(5) phosphorus-containing wastewater enters from drowned flow artificial wet land water-in, the activity packing area of flowing through successively, fixing packing area, and finally, from water outlet water outlet, phosphorus-containing wastewater is purified;
(6) after filling adsorption is saturated, from adsorbing the outlet of saturated filler, unloads part and adsorb saturated filler, from top, movable packing area, add new filler.
2. the method for raising Performance of Constructed Wetlands Substrates according to claim 1 to phosphorus removal effect in water, is characterized in that needing that zeolite is put into ball mill before filler pre-treatment pulverizes, and the particle diameter after grinding is controlled at 5-50 order.
3. the method for raising Performance of Constructed Wetlands Substrates according to claim 1 to phosphorus removal effect in water, the concentration that it is characterized in that hydrochloric acid soln described in step (1) is the immersion of 0.5-0.6 mol/L.
4. the method for raising Performance of Constructed Wetlands Substrates according to claim 1 to phosphorus removal effect in water, is characterized in that the strong stirring time of zeolite described in step (1) on magnetic stirring apparatus is 1.5-2.5 hour; Time of repose is 22-26 hour; Zeolite is 100-110 ℃ in the temperature of drying in oven.
5. the method for raising Performance of Constructed Wetlands Substrates according to claim 1 to phosphorus removal effect in water, it is characterized in that needing in step (2) that pretreated zeolite be take to the ratio of solid-to-liquid ratio 1:12-1:9, to add the concentration of zirconyl chloride solution be 15-25g/L, on magnetic stirring apparatus, the time of strong stirring is 10-14 hour, and zeolite is controlled at 100-110 ℃ in the temperature of drying in oven.
6. the method for raising Performance of Constructed Wetlands Substrates according to claim 1 to phosphorus removal effect in water, it is characterized in that described in step (3), maturing temperature is 450-550 ℃, roasting time is 1.5-2.5 hour, passes into nitrogen during roasting, and nitrogen intake is 45-55ml/min.
7. implement the device of raising Performance of Constructed Wetlands Substrates as claimed in claim 1 to phosphorus removal effect method in water for one kind, it is characterized in that comprising movable packing area, fixedly packing area and drowned flow artificial wet land, drowned flow artificial wet land becomes some movable packing areas and fixing packing area by baffle for separating, movable packing area and fixedly packing area are alternately to be arranged, and in artificial swamp the direction of current for from bottom to top by movable packing area, pass through fixedly packing area from top to bottom; Drowned flow artificial wet land one side lower part is provided with water-in, and opposite side top is provided with water outlet; Bottom, movable packing area arranges the saturated filler outlet of absorption; Fixedly the wetland plants such as reed are planted at top, packing area; The filler of filling in movable packing area and packing area is and carries zirconium zeolite finished product.
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| CN108314191A (en) * | 2018-01-18 | 2018-07-24 | 同济大学 | A kind of method and its device for villages and small towns sewerage nitrogen and phosphor recycling treatment |
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| CN108314191A (en) * | 2018-01-18 | 2018-07-24 | 同济大学 | A kind of method and its device for villages and small towns sewerage nitrogen and phosphor recycling treatment |
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