CN105645588A - Biological removing method for nitrogen and phosphorus in eutrophication water body - Google Patents
Biological removing method for nitrogen and phosphorus in eutrophication water body Download PDFInfo
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- CN105645588A CN105645588A CN201410635379.3A CN201410635379A CN105645588A CN 105645588 A CN105645588 A CN 105645588A CN 201410635379 A CN201410635379 A CN 201410635379A CN 105645588 A CN105645588 A CN 105645588A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Abstract
The present invention relates to a biological removing method for nitrogen and phosphorus in an eutrophication water body. According to the method, a water treatment ditch is built, three kinds of duckweeds such as Lemna minor L, Spirodela oligorrhiza (Kurz.) Hegalm and Spirodela polyrrhiza(L)Schleid are planted in the water treatment ditch according to a certain ratio, and nitrogen and phosphorus in an eutrophication water body are removed through the growth of the duckweeds, wherein the fresh weight ratio of the Lemna minor L to the Spirodela oligorrhiza (Kurz.) Hegalm to the Spirodela polyrrhiza(L)Schleid is 1-9:1-3:1-3. According to the present invention, different absorption characteristics of the different varieties of the duckweeds on nitrogen and phosphorus are used, and the plurality of the duckweed varieties are subjected to pouring according to a certain ratio, such that the good removing effect of the nitrogen and the phosphorus in the eutrophication water body can be achieved; with the duckweed interception at the water discharge port and the water body filtration integration device, the water body is further filtered while the controllability of the duckweed utilization is achieved, and the secondary pollution is prevented; and after nitrogen and phosphorus in the wastewater are absorbed through the duckweed, the resource utilization is performed so as to achieve the waste resource recycling turning waste into treasure.
Description
Technical field
The present invention relates to environmental improvement, in particular to a kind of biological removal method of nitrogen, phosphorus in eutrophication water.
Technical background
The pollution of the generation of eutrophication phenomenon and underground water and tap water has close relationship with the loss of compound fertilizer in daily production life. In order to reduce nitrogen and phosphorus pollution to the contribution of body eutrophication and groundwater pollution, a large amount of person property's power has been dropped into both at home and abroad on the source of control nutritive substance, but because of reasons such as water eutrophication pollution range are wide, pollution course is complicated, at present the improvement that water eutrophication is polluted also is not had desirable technological method.
Duckweed is the small-sized floated underwater acoustic fuze of the class being documented in " Chinese Plants will ", although duckweed is little and simple, but its effect is huge, not only it is widely used in the aspects such as plant physiology, genetics, ecology and environment measuring for many years, and it is widely used in the improvement of water pollution. More have report display duckweed can also effective hazardous and noxious substances in degrading waste water, purify liquid waste.
Although nitrogen, phosphorus nutrition material are had good absorption inrichment by duckweed, but in practical application process, also has a lot of defect. Owing to duckweed is floating class plant, therefore that the removal efficiency of nitrogen, phosphorus in darker water body is unsatisfactory; Duckweed is applicable to growing in the mild hydrostatic body of current, to the application also poor effect of the big water body of drop; The vitality of another duckweed is extremely strong, therefore it also can to kill other in same waters biological, improper fishery and waterplant industry are had very big harm if utilized, and water body can be produced secondary pollution.
Through the retrieval of prior art is found, Chinese patent literature CN103979686A discloses the method for a kind of ecological agriculture purification eutrophic water, build eutrophic water and the sunlight--system of the such eubiosis of the food of waterplant---hydrocoles---people, not allowing a certain, two kinds of waterplant or hydrocoles overgrow, eutrophic water is purified simultaneously. But the metabolism of this system Middle nutrition material is relative equilibrium, nitrogen, phosphorus ligands effect is more limited.
Chinese patent literature CN104045160A discloses a kind of method of biological rationalization process piggery wastewater, sewage disposal and herbage, duckweed plantation are combined, sewage its high nitrogen, phosphorus substance major part after fermentation, filtration are absorbed by herbage, reach and well process effect.But the method is only applicable to the sewage that source of pollution are concentrated, and wastes time and energy.
Summary of the invention
The object of the present invention, exactly in order to level that the intermediate product reduced in biotransformation is consumed, it is to increase the cumulative concentration of glucose in fermented liquid, it is provided that the biological removal method of nitrogen, phosphorus and construction process thereof and application in an eutrophication water.
In order to realize the object of the present invention, present invention employs following technical scheme: in a kind of eutrophication water, the biological removal method of nitrogen, phosphorus is, build water treatment irrigation canals and ditches, three kinds of duckweeds i.e. blue or green duckweed (LemnaminorL.), few root duckweed (Spirodelaoligorrhiza (Kurz) Hegelm.) and many duckweeds (Spirodelapolyrhiza (Linn.) Schleid.) are planted in water treatment irrigation canals and ditches by proportioning, remove nitrogen, phosphorus in eutrophication water by the growth of duckweed; The proportioning of described blue or green duckweed, few root duckweed and Duo Gen duckweed is: blue or green duckweed: few root duckweed: the fresh anharmonic ratio of many duckweeds is 1��9: 1��3: 1��3.
Described water treatment irrigation canals and ditches are set to into pool, water flow buffer district, duckweed growth district and drained zone by current direction order, are provided with duckweed interception and water body filtration integrated device in drained zone, and described duckweed is planted in duckweed growth district.
The width in described water flow buffer district and the degree of depth are greater than into pool, duckweed growth district and drained zone, to slow down current, precipitation sandstone.
The depth of water in described duckweed growth district is 10��100cm.
The interception of described duckweed and water body filtration integrated device comprise baffle plate, filter screen and without woven cloths, two pieces of baffle plates are clipped in the middle by filter screen with without woven cloths, the aperture of filter screen is 1.5-2.5mm, being provided with pickup groove in both sides, exhalant region, duckweed interception and water body filtration integrated device are inserted in this pickup groove and can according to water level up-down adjustment.
It is an advantage of the current invention that: utilize different duckweed kind to the difference of the absorption feature of nitrogen, phosphorus, multiple duckweed kind is carried out proportioning input; By building irrigation canals and ditches water flow buffer district to provide the environment of suitable duckweed growth; According to the feature of duckweed as pleuston, throwing in the region of duckweed, widen the area of duckweed growth, reduce the degree of depth of water body; Therefore, it is possible to reach the removal effect of good eutrophication water nitrogen, phosphorus. And by the duckweed interception of drained zone and water body filtration integrated device, while water body is filtered further, reach the controllability of the utilization to duckweed, prevent secondary pollution; And after duckweed absorbs the nitrogen in waste water, phosphorus, by its recycling, reach the object of the resource circulation utilization turned waste into wealth. It is worth so the present invention has great Theory and applications.
Accompanying drawing explanation
Fig. 1 is the floor plan schematic diagram of water treatment irrigation canals and ditches;
Fig. 2 is that three duckweed kind different ratio process NH4+Absorption feature, in figure, A, B, C, D are followed successively by blue or green duckweed: few root duckweed: absorption feature when many duckweeds fresh heavy is respectively 9: 1: 1,1: 3: 1,1: 1: 3,1: 1: 1;
Fig. 3 is that three duckweed kind different ratio process NO3-Absorption feature, in figure, A, B, C, D are followed successively by blue or green duckweed: few root duckweed: absorption feature when many duckweeds fresh heavy is respectively 9: 1: 1,1: 3: 1,1: 1: 3,1: 1: 1;
Fig. 4 is that three duckweed kind different ratio process H2PO4-Absorption feature, in figure, A, B, C, D are followed successively by blue or green duckweed: few root duckweed: absorption feature when many duckweeds fresh heavy is respectively 9: 1: 1,1: 3: 1,1: 1: 3,1: 1: 1.
Specific implementation method
In eutrophication water of the present invention, the biological removal method of nitrogen, phosphorus is, build water treatment irrigation canals and ditches, it is 1��9: 1��3: 1��3 be planted in water treatment irrigation canals and ditches by three kinds of duckweeds i.e. blue or green duckweed, few root duckweed and Duo Gen duckweed by fresh anharmonic ratio, removes nitrogen, phosphorus in eutrophication water by the growth of duckweed.
See Fig. 1, the water treatment irrigation canals and ditches in the present invention are set to into pool 1, water flow buffer district 2, duckweed growth district 3 and drained zone 4 by current direction order, are provided with duckweed interception and water body filtration integrated device 5 in drained zone, and duckweed is planted in duckweed growth district. Wherein, the width in water flow buffer district and the degree of depth are greater than into pool, duckweed growth district and drained zone, to slow down current, precipitation sandstone. The depth of water in duckweed growth district is 10��100cm. Duckweed interception and water body filtration integrated device comprise baffle plate, filter screen and without woven cloths, two pieces of baffle plates are clipped in the middle by filter screen with without woven cloths, the aperture of filter screen is 1.5-2.5mm, being provided with pickup groove in both sides, exhalant region, duckweed interception and water body filtration integrated device are inserted in this pickup groove and can according to water level up-down adjustment. Baffle plate is provided with multiple through hole.
Below by embodiment, the present invention being done detailed explanation, the present embodiment is implemented under premised on technical solution of the present invention, gives detailed enforcement mode and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1
The main raw of the present embodiment: NH4Cl, 1/10Hogland nutritive medium (pH5.5), blue or green duckweed, few root duckweed, many duckweeds.
In general eutrophication water, ammonium nitrogen concentration is as foundation, on the basis of 1/10Hogland nutritive medium, will wherein nitrogen nutrition be adjusted to containing NH4+Concentration be 0.75mmol/L. Get 350ml expendable transparent plastic cup, pour the above-mentioned nutrient solution of 200ml respectively into; Select each duckweed kind grown fine, four duckweed input process are set: blue or green duckweed: few root duckweed: the fresh anharmonic ratio of many duckweeds is respectively hybrid process (being numbered A, B, C, D process successively respectively) of 9: 1: 1,1: 3: 1,1: 1: 3,1: 1: 1, it is fresh heavy that the injected volume of each process duckweed is about 0.1g, 15 repetitions are established in each process, and do the blank not throwing in duckweed. Every day, with the moisture of deionized water replenish loss, gets three repetitions for every 3 days at random, adopts indophenol blue colorimetry to measure the content of NH4+ in nutrient solution.
As shown in Figure 2, at the input initial stage, B processes NH4+Uptake rate the fastest, except A processes NH after 21 days4+Clearance lower, be 56.4%, B, C, D process to NH4+All there is high clearance, it is respectively 97.8%, 96.1%, 96.8%; Illustrate that the B taking few root duckweed as sociales processes NH4+Receptivity the strongest. Generally speaking, taking different duckweed kind as during sociales to the NH of different concns4+Receptivity different, therefore, according to the particular case of eutrophication water, difference duckweed kind can be carried out rational proportion, to strengthen it to the NH in eutrophication water4+Remove.
Embodiment 2
The main raw of the present embodiment: KNO3, 1/10Hogland nutritive medium (pH5.5), blue or green duckweed, few root duckweed, many duckweeds.
In general eutrophication water, nitre state concentration is as foundation, on the basis of 1/10Hogland nutritive medium, will wherein nitrogen nutrition be adjusted to containing NO3-Concentration be the nutrient solution of 0.75mmol/L. Get 350ml expendable transparent plastic cup, pour the above-mentioned nutrient solution of 200ml respectively into;Select each duckweed kind grown fine, four duckweed input process are set: blue or green duckweed: few root duckweed: the fresh anharmonic ratio of many duckweeds is respectively 9: 1: 1,1: 3: 1,1: 1: 3,1: 1: 1 (being numbered A, B, C, D successively respectively), it is fresh heavy that the injected volume of each process duckweed is about 0.1g, 15 repetitions are established in each process, and do the blank not throwing in duckweed. Every day, with the moisture of deionized water replenish loss, gets three repetitions for every 3 days at random, adopts double-wavelength method to measure the concentration of nitric nitrogen in nutrient solution.
As shown in Figure 3, four process are to NO3-All having high clearance, after 18 days, A processes NO3-Clearance be up to 95.5%, illustrate taking blue or green duckweed as during sociales to NO3-There is better removal effect.
Embodiment 3
The main raw of the present embodiment: KH2PO4, 1/10Hogland nutritive medium (pH5.5), blue or green duckweed, few root duckweed, many duckweeds.
In eutrophication water, phosphorus concentration is as foundation, on the basis of 1/10Hogland nutritive medium, is adjusted to phosphorus nourishing containing H2PO4 -Concentration be the nutrient solution of 0.2mmol/L. Get 350ml expendable transparent plastic cup, pour the above-mentioned nutrient solution of 200ml respectively into; Select each duckweed kind grown fine, four duckweed inputs process is set: the single process of blue or green duckweed, few root duckweed, many duckweeds and blue or green duckweed: few root duckweed: many duckweeds fresh heavy is the hybrid process of 1: 1: 1, it is fresh heavy that the injected volume of each process duckweed is about 0.1g, 15 repetitions are established in each process, and do the blank not throwing in duckweed. Every day, with the moisture of deionized water replenish loss, gets three repetitions for every 3 days at random, adopts H in molybdate spectrophotometry nutrient solution2PO4 -Content.
As shown in Figure 4, at the input initial stage, the process of A and D is to H2PO4 -Uptake rate faster, but after 12 days, B and C processes H2PO4 -Uptake rate faster; Illustrate that the process of A and D is to the H of high density2PO4 -Have higher receptivity, B and C process to lower concentration H2PO4 -There is higher avidity. All in all, taking different duckweed kind as during sociales to the H of different concns2PO4 -Receptivity different, therefore, according to particular case, difference duckweed kind can be carried out rational proportion, to strengthen it to the removal of the phosphorus element in eutrophication water.
The principle of work of the present invention is, eutrophication water is introduced in water treatment irrigation canals and ditches, drop into the duckweed of multi items proportioning, then, by duckweed interception and water body filtration integrated device, while being purified further by water body, duckweed is spread unchecked in control, prevent secondary pollution, reach the object improving water body nitrogen, phosphorus ligands efficiency, reach the controllability of the utilization to duckweed simultaneously, prevent secondary pollution; And after duckweed absorbs the nitrogen in waste water, phosphorus, by its recycling, reach the object of resource recycling.
Claims (5)
1. the biological removal method of nitrogen, phosphorus in eutrophication water, it is characterized in that, build water treatment irrigation canals and ditches, three kinds of duckweeds i.e. blue or green duckweed, few root duckweed and Duo Gen duckweed are planted in water treatment irrigation canals and ditches by proportioning, remove nitrogen, phosphorus in eutrophication water by the growth of duckweed; The proportioning of described blue or green duckweed, few root duckweed and Duo Gen duckweed is: blue or green duckweed: few root duckweed: the fresh anharmonic ratio of many duckweeds is 1��9: 1��3: 1��3.
2. the biological removal method of nitrogen, phosphorus in eutrophication water according to claim 1, it is characterized in that, described water treatment irrigation canals and ditches are set to into pool, water flow buffer district, duckweed growth district and drained zone by current direction order, be provided with duckweed interception and water body filtration integrated device in drained zone, described duckweed is planted in duckweed growth district.
3. the biological removal method of nitrogen, phosphorus in eutrophication water according to claim 2, it is characterised in that, the width in described water flow buffer district and the degree of depth are greater than into pool, duckweed growth district and drained zone, to slow down current, precipitation sandstone.
4. the biological removal method of nitrogen, phosphorus in eutrophication water according to claim 2, it is characterised in that, the depth of water in described duckweed growth district is 10��100cm.
5. the biological removal method of nitrogen, phosphorus in eutrophication water according to claim 2, it is characterized in that, the interception of described duckweed and water body filtration integrated device comprise baffle plate, filter screen and without woven cloths, two pieces of baffle plates are clipped in the middle by filter screen with without woven cloths, the aperture of filter screen is 1.5-2.5mm, being provided with pickup groove in both sides, exhalant region, duckweed interception and water body filtration integrated device are inserted in this pickup groove and can according to water level up-down adjustment.
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| CN201410635379.3A CN105645588B (en) | 2014-11-12 | 2014-11-12 | The biological removal method of nitrogen, phosphorus in eutrophication water |
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| CN201410635379.3A CN105645588B (en) | 2014-11-12 | 2014-11-12 | The biological removal method of nitrogen, phosphorus in eutrophication water |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108911153A (en) * | 2018-07-06 | 2018-11-30 | 浙江海洋大学 | A kind of ecological restoring method of eutrophication water |
| CN112056198A (en) * | 2020-09-09 | 2020-12-11 | 青萍湾（武汉）生物科技有限公司 | Method for improving biomass accumulation and nitrogen, phosphorus and COD removal efficiency of duckweed |
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2014
- 2014-11-12 CN CN201410635379.3A patent/CN105645588B/en not_active Expired - Fee Related
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108911153A (en) * | 2018-07-06 | 2018-11-30 | 浙江海洋大学 | A kind of ecological restoring method of eutrophication water |
| CN112056198A (en) * | 2020-09-09 | 2020-12-11 | 青萍湾（武汉）生物科技有限公司 | Method for improving biomass accumulation and nitrogen, phosphorus and COD removal efficiency of duckweed |
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