CN101503250B - Method for purifying hogpen wastewater - Google Patents
Method for purifying hogpen wastewater Download PDFInfo
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- CN101503250B CN101503250B CN2009100366125A CN200910036612A CN101503250B CN 101503250 B CN101503250 B CN 101503250B CN 2009100366125 A CN2009100366125 A CN 2009100366125A CN 200910036612 A CN200910036612 A CN 200910036612A CN 101503250 B CN101503250 B CN 101503250B
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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
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention discloses a method for purifying wastewater in a pig farm, which comprises the following steps: selecting plants and fixedly planting the plants on a floating carrier, wherein the roots of the plants extend from the bottom part of the floating carrier to enter a water body; separating a place for holding the wastewater to increase the water flow distance and the residence time of the wastewater; distributing the floating carrier on which the plants are fixedly planted on the water surface of the wastewater; and carrying out oxygen enriched aeration to the water body nearby the root systems of the fixedly planted plants. The method for purifying the wastewater in the pig farm has the advantages of low investment and operating cost, convenient construction and maintenance renovation, and good application prospect in the tail treatment of the wastewater in the pig farm; and while the wastewater is purified, plant products can be gained.
Description
Technical field
The present invention relates to a kind of piggery wastewater purifying method, belong to the purification of waste water field.
Background technology
Water pollution is that the China and the world face very serious environmental problem, and more and more serious trend is arranged." resource and water quality lack of water " becomes one of important factor of restriction economy and social development.Even if animal husbandry such as piggery wastewater are through typical disposal methods waste water such as " solid-liquid separation-anaerobic-aerobics ", the waste water of discharge still contains pollutents such as high nitrogen, phosphorus and organic matter, can cause the eutrophication of water body.Utilize aquatic floating plant such as Herba Eichhorniae to plant at the pig farm oxidation pond, purify water, the end that is widely used in piggery wastewater is handled, but Herba Eichhorniae since water content up to 97%, harvesting utilization very the difficulty, running its course causes secondary pollution easily, the terminal purifying treatment of piggery wastewater, promptly how handle, accelerate the oxidation pond water purification, become the key that piggery wastewater purifies with convenient, low operating cost and comprehensive utilization technique.Utilize aquatic floating plant and floating carrier, plantation such as floating bed plant, be widely used in the purification and the improvement of eutrophication water, for example United States Patent (USP) 5820759,5811007, Chinese patent CN13155144, CN13155145, CN1425616, CN1426966, CN1552641, CN1580415, CN1683258, CN1769215, CN1800054, CN1836495, CN1926960, CN101003408, CN101023733 etc., these all are at nitrogen, use in phosphorus and the organic relatively low eutrophication water, at high nitrogen, phosphorus and organic matter, the pig farm oxidation pond that dissolved oxygen content is lower in the water body lacks effective purification techniques.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of piggery wastewater purifying method is provided.
Piggery wastewater purifying method of the present invention may further comprise the steps:
(1) choose plant and with plant fixing on floating carrier, plant root stretches out to enter waste water from floating carrier bottom;
(2) place of admitting waste water is separated, to increase the water flow distance and the residence time of waste water;
(3) will there be the floating carrier of field planting plant to be distributed in the waste water water surface;
(4) to field planting root system of plant annex water body oxygenation aeration.
The plant of choosing described in the step (1) can be the ornamental plant class: cyperus alternifolius, Canna generalis Bailey, Caulis Miscanthis floriduli, close fruit taro, gold leaf wood etc.; The herbage class: hybrid Chinese pennisetum, green grass or young crops are raised corn, rye grass etc.; Greengrocery: water spinach, lettuce, celery etc.
Floating carrier described in the step (1) is the poly-third vinyl foam plate; The described poly-third vinyl foam plate is divided into poly-third vinyl foam plate of the big plant type plant of plantation and the poly-third vinyl foam plate of the little plant type plant of plantation: the poly-third vinyl foam plate thickness of the big plant type plant of described plantation is 5cm, every 1.5M
2Plate is provided with 20 holes, and aperture 11cm is used to plant the plant of Herba penniseti, Canna generalis Bailey, cyperus alternifolius or other big plant types; The poly-third vinyl foam plate thickness of the little plant type plant of described plantation is 5cm, every 1.5M
2Plate is provided with 54 holes, and aperture 5cm is used to plant the plant of water spinach, lettuce, celery or other little plant types.
Described in the step (2) place of admitting waste water being separated is to admit the place of waste water to separate to be set to zig-zag type groove, S type groove or other can increase the water flow distance of waste water and the groove of residence time; The available brick wall of described separation is separated.
It is to have the floating carrier of the highest plant of adaptability to place near the water inlet field planting that floating carrier described in the step (3) is distributed in the waste water water surface, places successively until water outlet with the adaptability gradient of plant; The water surface fraction of coverage of floating carrier is 40～70%.Described adaptability be meant plant can be in certain nitrogen, phosphorus and organic concentration range normal growth and finish its life cycle, have than higher biological yield and to the removal effect of pollutent.
The oxygenation aeration is to utilize air compressor pump described in the step (4), and near pipeline water body ventilation generation bubble oxygen supply root system of plant with sebific duct or other suitable air feed under water perhaps utilizes the mechanical aeration method, improves oxygen in water content; Available air valve or aeration time control aeration intensity; Described oxygenation aeration, water inlet oxygenation aeration intensity is higher than water outlet oxygenation aeration intensity, and the dissolved oxygen concentration of water body remains on more than 40% of saturated dissolved oxygen.
Technical scheme provided by the invention compared with prior art has following beneficial effect:
(1) the piggery wastewater purifying method that provides of the present invention makes the waste water water flow distance from the water inlet to the water outlet and the growth of delay treatment time in oxidation pond, the increase along with distance of pollutents such as nitrogen, phosphorus, organic matter, the Pollutant levels gradient increases, and improves the decontamination effect improving of oxidation pond waste water;
(2) place the subregion of different adaptability floating plant cultivations, and different types of plant is in the environment of different Pollutant levels, improves decontamination effect improving;
(3) floating carrier can be planted the plant of different big or small plant types by different apertures and density are set, and makes easily, and cost is low, and this floating carrier can bear 40kg/M
2Load can be carried out large-scale production in factory, and carrier 3-5 in work-ing life can mix pulverizing after the use with the plant cutting, be mixed with plant growth medium;
(4) the simple to operate easy realization of oxygenation aeration, both accelerate oxidative degradation, ammonium ion organic in the waste water and be oxidized to nitrate ion, improved simultaneously the dissolved oxygen of root district water again, help keeping the metabolic function of root system of plant, the growth of plant and the activity of root-zone microorganism, this further promotes plant to nutrient absorbing such as nitrogen, phosphorus again, transforms and degraded;
(5) piggery wastewater purifying method provided by the invention have investment and running cost low, build and keep and upgrade conveniently, when purifying liquid waste, can gather in the crops plant prod, in the end of piggery wastewater is handled, have a good application prospect.
Description of drawings
Fig. 1 is a little plant type planting cup synoptic diagram described in the embodiment 1.
Fig. 2 admits the separate slot subregion and the current of piggery wastewater oxidation pond to move towards synoptic diagram among the embodiment 1.
Fig. 3 is an oxygenation aeration synoptic diagram among the embodiment 1.
Embodiment
Embodiment 1
With certain piggery wastewater is the test water body.
(1) choose plant and with plant fixing on floating carrier, plant root stretches out to enter waste water from floating carrier bottom: choose field planting such as Herba penniseti, Canna generalis Bailey, cyperus alternifolius on floating carrier, floating carrier is with the thick poly-third vinyl foam plate of 5cm, at 1.5M
220 holes are set on the plate, and pitch-row is 25, aperture 11cm, and the planting cup field planting of employing, the planting cup specification is: go up bore 13cm, following bore 9cm, high 11cm, Zhou Nianjun can carry out, but the most suitablely carries out at spring and autumn; At 1.5M
254 holes are set on the plate, aperture 5cm, pitch-row 15cm, the planting cup specification that adopts is: go up bore 5cm, following bore 3.5cm, high 7cm is used to plant the plant of little plant types such as water spinach, lettuce, celery, and the water spinach implantation time is in 5-10 month, lettuce, the celery implantation time March in October to the second year.This floating carrier can bear 40kg/M
2Load, carrier 3-5 in work-ing life can mix pulverizing after the use with the plant cutting, be mixed with plant growth medium.
(2) oxidation pond of admitting waste water is separated, to increase water flow distance and the residence time of waste water in oxidation pond: oxidation pond is separated the groove that is set to zig-zag type with brick wall, sees Fig. 2, thick 36cm is brick, height and pool bank contour (about 1.5M), with 1: 2 cement sand plaster, cement cream troweling.Can use for a long time after the separation, but brick wall pedestrian, the width of separated groove is 300cm between wall and the wall, be about 50M, oxidation pond is divided about 9 grooves, by separating, the distance of current strengthens 9 times, and the time of delay also prolongs about 5 times, simultaneously, by adjusting the take-off rate of mouth of a river water, further adjust the flow velocity and the residence time of water, prolong the clarification time, the concentration gradient of pollutents such as the nitrogen of water-in and water outlet, phosphorus and organic matter enlarges like this, decontamination effect improving improves, and convenient simultaneously the floating cultivation plant is carried out that the subregion is placed and to the operational management of system.
(3) will have the floating carrier of field planting plant to be distributed in the waste water water surface: little plant type plants such as big plant type plant such as plantation Canna generalis Bailey, cyperus alternifolius, Caulis Miscanthis floriduli and water spinach float on the oxidation pond water surface.In 9 grooves of whole oxidation pond, Canna generalis Bailey is planted in the 1st, 7,8 and 9 groove, plants 500 blocks of plates, cyperus alternifolius is planted in the 2nd, 3 and 4 groove, and Caulis Miscanthis floriduli is in the 5th groove, and water spinach is in the 6th groove, plant 1500 blocks of plates altogether, the field planting plate is about 70% in the fraction of coverage of the water surface in the groove.
(4) to field planting root system of plant annex water body oxygenation aeration: utilize air compressor pump, air is being assigned to each arm by being responsible for, connecting porcelain head by the arm sebific duct stretches near the water body root system, to produce the micro-bubble aeration oxygen replenishing, each arm is established air valve to regulate aeration intensity, change by monitoring water body dissolved oxygen content, aeration time is controlled in the changing conditions of aeration between intermittence according to oxygen in water, adopt timer that 24 hours are set for the interval of the aeration time in cycle and aeration, so that the dissolved oxygen content in the water reaches requirement, admit the high regional oxygenation aeration intensity of the organic concentration of water inlet annex nitrogen phosphorus of waste water to increase, and the oxygenation intensity of the annex of water outlet can reduce, make the dissolved oxygen of water body remain on more than 40% of saturated dissolved oxygen, to satisfy needs and the promotion degradation of organic matter that plant is kept the root system normal growth.
Dash pig farm fecal sewage behind the circle after handling every slag, anaerobically fermenting and aeration, enter above-mentioned oxidation pond, the main proterties of its inflow water body sees Table 1:
Table 1 is for trying the water the main proterties of body
Annotate: COD
CrThe expression chemical oxygen demand, NH
4 +-N represents ammonium nitrogen, and TN represents total nitrogen, and TP represents total phosphorus, and SP represents titanium pigment.
Water quality was measured 1 time in per 14 days, and plant was measured and increases quality in 75 days, test totally 72 days.
Test-results shows, it is about 90% to remove nitrogen in the sewage by plantation plant treatment sewage, can be the total nitrogen of water inlet from 18.63-759.20mgL
-1, drop to the 1.45-51.85mgL of water outlet
-1, the ammonium nitrogen of water inlet is from 13.49-724.99mgL
-1, drop to the 0.14-27.14mgL of water outlet
-1, the nitric nitrogen of water inlet is from 0.78-24.11mgL
-1, drop to the 0.008-1.32mgL of water outlet
-1, illustrate that the effect of nitrogen is very remarkable in purifying waste water in this pleuston repair system, wherein with most productive period 1-2 month most pronounced effects of growth.This is owing to be planted in that plant growth rate in the sewage of pig farm is fast, increment is big, shifts out water body thereby the nitrogen in the sewage absorbed, and the while is also by the decompose removal of some enzymes in root system and the water body for nitrogenous compound.And the well-grown of Canna generalis Bailey, cyperus alternifolius, Caulis Miscanthis floriduli and this several plant of water spinach, growth increases quality and reaches every 1.5M respectively
2Floating plate 31,27,24,32kg.
Close with the removal effect of nitrogen, by in the sewage of plantation plant treatment no matter be the total phosphorus (TP) or the clearance of titanium pigment (SP) all about 90%, the different times effect has difference.Can be the titanium pigment of water inlet from 3.76-50.84mgL
-1, drop to the 0.04-5.35mgL of water outlet
-1The total phosphorus of water inlet is from 5.24-54.14mgL
-1, drop to the 0.05-5.69mgL of water outlet
-1
By COD in the sewage after the floating plantation plant treatment
Cr, can be the COD of water inlet
Cr, from 106.01-6000.00mgL
-1, drop to the 0.00-44.35mgL of water outlet
-1, reduce the percentage number average about 90%, illustrate that the effect of utilizing this system to dispose of sewage is more remarkable.
Embodiment 2
Adopt method provided by the invention, certain pig farm is dashed pig farm fecal sewage behind the circle through the natural pond liquid behind slag, anaerobically fermenting, after natural pond liquid is converted water dilution in 1: 3, in the 40L bread bin, carry out small-sized floating cultivation Herba penniseti and oxygenation synergism test by method provided by the invention.
If do not plant, plant, do not plant add oxygenation, plantation adds 4 experimental group such as oxygenation, oxygenation was treated to per 2 hours aerations 15 minutes, repeated for 3 times, 1 repetition of every bread bin, every case is contained natural pond liquid 30L, plants 2 Herba pennisetis, test period is 28 days, and test-results sees Table 2, table 3:
Table 2 is for examination natural pond liquid water quality condition (mg/L)
Contain higher nitrogen, phosphorus and organic matter for examination natural pond liquid.In 15 minutes oxygenation of per 2 hours aerations is handled, can make oxygen in water from 4.87Mg/L, increase to 7.28mg/L.
What table 3 was respectively handled Herba penniseti increases quality and purification of water quality rate (%)
As can be seen from Table 3, oxygenation is handled the decomposition and the ammonium that help organic matter and is changed into nitre, reaches organic phosphorus and changes into water-soluble phosphorus, promotes absorption and the growth of Herba penniseti to nitrogen phosphorus, has reached the effect of efficient purification piggery wastewater.
Claims (8)
1. piggery wastewater purifying method is characterized in that may further comprise the steps:
(1) choose Herba penniseti, cyperus alternifolius, Canna generalis Bailey, water spinach, lettuce or apigeninidin and be implanted on the floating carrier, described plant root stretches out to enter waste water from the floating carrier bottom;
(2) place of admitting waste water is separated, to increase the water flow distance and the residence time of waste water;
(3) will there be the floating carrier of field planting plant to be distributed in the waste water water surface;
(4) to field planting root system of plant annex water body oxygenation aeration, make the dissolved oxygen concentration of water body remain on more than 40% of saturated dissolved oxygen.
2. piggery wastewater purifying method as claimed in claim 1 is characterized in that floating carrier described in the step (1) is the poly-third vinyl foam plate.
3. piggery wastewater purifying method as claimed in claim 2 is characterized in that the described poly-third vinyl foam plate is divided into poly-third vinyl foam plate of the big plant type plant of plantation and the poly-third vinyl foam plate of the little plant type plant of plantation; The poly-third vinyl foam plate thickness of the big plant type plant of described plantation is 5cm, and per 1.5 square metres of plates are provided with 20 holes, and aperture 11cm is used to plant the plant of Herba penniseti, Canna generalis Bailey, cyperus alternifolius or other big plant types; The poly-third vinyl foam plate thickness of the little plant type plant of described plantation is 5cm, and per 1.5 square metres of plates are provided with 54 holes, and aperture 5cm is used to plant the plant of water spinach, lettuce, celery or other little plant types.
4. piggery wastewater purifying method as claimed in claim 1, it is characterized in that described in the step (2) place of admitting waste water is separated is to admit the place of waste water to separate to be set to zig-zag type groove, S type groove or other can increase the water flow distance of waste water and the groove of residence time.
5. piggery wastewater purifying method as claimed in claim 1 is characterized in that it is to have the floating carrier of plant to place near the water inlet field planting that floating carrier described in the step (3) is distributed in the waste water water surface, places until water outlet successively with the adaptability gradient of plant.
6. as claim 1 or 5 described piggery wastewater purifying methods, the water surface fraction of coverage that it is characterized in that floating carrier is 40～70%.
7. piggery wastewater purifying method as claimed in claim 1, it is characterized in that the oxygenation aeration is to utilize air compressor pump described in the step (4), with near pipeline water body ventilation generation bubble oxygen supply or mechanical aeration method root system of plant of sebific duct or other suitable air feed under water.
8. piggery wastewater purifying method as claimed in claim 1 is characterized in that oxygenation aeration described in the step (4) is with air valve or aeration time control aeration intensity; Water inlet oxygenation aeration intensity is higher than water outlet oxygenation aeration intensity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100366125A CN101503250B (en) | 2009-01-13 | 2009-01-13 | Method for purifying hogpen wastewater |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100366125A CN101503250B (en) | 2009-01-13 | 2009-01-13 | Method for purifying hogpen wastewater |
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| CN101503250A CN101503250A (en) | 2009-08-12 |
| CN101503250B true CN101503250B (en) | 2011-05-18 |
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| CN2009100366125A Expired - Fee Related CN101503250B (en) | 2009-01-13 | 2009-01-13 | Method for purifying hogpen wastewater |
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| CN104909461B (en) * | 2015-05-25 | 2017-04-12 | 关克忠 | Sewage remediation method |
| CN108975961B (en) * | 2018-09-18 | 2023-06-16 | 江苏省农业科学院 | High-nitrate-nitrogen biogas slurry preparation device and preparation method as hydroponic nutrient solution |
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Granted publication date: 20110518 Termination date: 20140113 |