CN106242168A - A kind of method utilizing periphyton to process animal farm wastewater - Google Patents
A kind of method utilizing periphyton to process animal farm wastewater Download PDFInfo
- Publication number
- CN106242168A CN106242168A CN201610703043.5A CN201610703043A CN106242168A CN 106242168 A CN106242168 A CN 106242168A CN 201610703043 A CN201610703043 A CN 201610703043A CN 106242168 A CN106242168 A CN 106242168A
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- Prior art keywords
- periphyton
- water
- animal farm
- farm wastewater
- wastewater
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5263—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using natural chemical compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/16—Total nitrogen (tkN-N)
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/18—PO4-P
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
- C02F3/322—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae use of algae
-
- 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 invention provides a kind of method utilizing periphyton to process animal farm wastewater, first put in natural eutrophication water by the artificial substratum of the attachment of applicable periphyton and easily folding and unfolding, the periphyton in water body is seeded on artificial substratum；Pretreated animal farm wastewater is entered in the annular processes pond of outdoor, then uniformly put into annular processes pond by being attached with week from the artificial substratum of algae, process 8～12 days, the periphyton being seeded on nylon wire can utilize sunlight, in animal farm wastewater while growth, effectively removing the nitrogen phosphorus in waste water, after treatment, wherein the clearance of total nitrogen, total phosphorus and COD is respectively 86.5～94.8%, 93.4～98.7% and 91.5～95.6% to animal farm wastewater.Periphyton after water after present invention purification can be used for field irrigation, afforestation etc., and process is prone to results, can be used as fertilizer or feedstuff, effectively realizes the optimum ecological circulation of waste water.
Description
Technical field
The invention belongs to organic wastewater bioremediation Technology field, relate to one and utilize periphyton effectively to process plant
The method of waste water, particularly relates to a kind of utilize periphyton effectively to process the method for nitrogen phosphorus in Pig raising wastewater.
Background technology
Along with the development of livestock and poultry cultivation technology, the live pig that distributing pig-breeding is gradating as scale produces mould
Formula, this large batch of concentration breeding way will necessarily produce the pig manure of the nutrient substance such as a large amount of rich Nitrogen-and Phosphorus-containings and microorganism and give up
Water.And the pig farm of this scale is mainly built near city, town, it is clear that these are dirty not to have enough agricultural lands to be received
Water, if without processing the most directly discharge, necessarily causing neighbouring lake and the pollution of river water and eutrophication, so scale
The problem of environmental pollution that change pig-breeding causes gradually causes everybody concern.
Periphyton refers to be grown in the algae in various stromal surface in water body, antibacterial and the compound group of chip composition
Fall, there is natural purification and filtration, it by the absorption and sorption of nitrogen and phosphorus, oxidation Decomposition, precipitate and store work
And have adjusted the trophic level of water body, it is primary producer, is again the main moderator of nutrient substance flowing, is that water body is rich
Nutrient laden is administered and irreplaceable important step in recovery process.Research finds that the nitrogen phosphorus in waste water is not only had by periphyton
There are good absorption and delay effect, but also the suspended particulate matter in water body had good absorption and precipitation,
Can effectively reduce the trophic level of Water phosphorus, increase water transparency.Periphyton is successively applied to from the beginning by people
The pretreatment of aquatic product, oxidation pond, sewage treatment plant and Aquatic product recirculation system etc..
Chinese patent CN103663672A propose " a kind of utilize scrape feeding fish and periphyton to jointly control lake rich
The method of nutrient laden ", it is that the nitrogen phosphorus in water body is effectively absorbed and converts by the periphyton utilizing artificial substratum to grow, and
Periphyton is the bait scraping feeding fish, a certain amount of scrapes feeding fish so putting in a suitable place to breed again, goes to scrape the Zhou Congsheng in food substrate
Thing, thus reduce Water phosphorus nutrition material concentration and improve the purpose of aquatic products amount.This technology is controlling lake Fu Ying
Though fosterization aspect achieves certain effect, but due to the enough illumination of the growth needs of periphyton and nutritional condition, relatively low
Trophic level or deeper nutrition-enriched water of lake in the Biomass of periphyton be difficult to improve, scrape feeding fish so utilizing
The method jointly controlling lake eutrophication with periphyton is difficult to, and direct popularization and application there is also some problems.But mesh
Before there is not yet and utilize periphyton to remove the relevant report of nitrogen phosphorus in pig farm waste water.
Summary of the invention
The invention provides and a kind of utilize periphyton effectively to remove the method for nitrogen phosphorus in cultivation factory waste water, purify scale
The excrement and urine water of a large amount of rich Nitrogen-and Phosphorus-containing produced during poultry or livestock breeding, the water after purification can be used for field irrigation, gardens
Periphyton after greening etc., and process is prone to results, can be used as fertilizer or feedstuff, and the optimum ecology effectively realizing waste water is followed
Ring.
For reaching object above, the present invention adopts the following technical scheme that
A kind of method utilizing periphyton to process animal farm wastewater, comprises the following steps: adhered to by applicable periphyton
And the artificial substratum of easily folding and unfolding puts in natural eutrophication water, the periphyton in water body is seeded on artificial substratum；Will
Pretreated animal farm wastewater enters in the annular processes pond of outdoor, then uniform from the artificial substratum of algae by being attached with week
Putting in annular processes pond, process 8～12 days, the periphyton being seeded on nylon wire can utilize sunlight, in plant
In waste water while growth, effectively remove the nitrogen phosphorus in waste water, animal farm wastewater after treatment, wherein total nitrogen, total phosphorus and COD
Clearance is respectively 86.5～94.8%, 93.4～98.7% and 91.5～95.6%.
Specifically include following steps: the artificial substratum of the attachment of applicable periphyton and easily folding and unfolding is put into natural rich battalion by (1)
Under water at 0.2～0.5m of littoral zone, fosterization lake, after cultivating 8～15 days, fetching apposition growth has the people of a large amount of periphyton
Work substrate is stand-by；
(2) by animal farm wastewater after sedimentation tank staticly settles 4～8 hours, the waste water of preliminary sedimentation is moved into flocculation basin,
Process with sewage flocculant again, after filter screen filtration, obtain COD value at 500～800mg L-1The cultivation of process to be clean
Field waste water；
(3) pretreated animal farm wastewater in step (2) is entered in the annular processes pond of outdoor；
(4) will complete postvaccinal artificial substratum and vertically put in annular processes pond, every day carries out natural lighting, through 8
～after 12 days process, in water body, the clearance of total nitrogen, total phosphorus and COD is respectively 86.5～94.8%, 93.4～98.7% and
91.5～95.6%；
(5) waste water after being disposed uses as field irrigation, water for afforestation, and is attached with week from algae
Artificial substratum after the 2～3 batches of animal farm wastewater that are disposed, be drawn off and to collect week thereon fertile as agricultural from algae
Material or fishery cultivating feedstuff use.
Described artificial substratum is granite block, PVC board, polythene net or nylon wire.
Described artificial substratum is preferably nylon wire, its a length of 50～70cm, wide 30～50cm, aperture is 1mm.
Being provided with water pump in described process pond, the flow velocity opening water pump control waste water is 0.02～0.05m/s.
Compared with prior art, the technical scheme that the present invention provides has the advantage that 1, method provided by the present invention
High to the clearance of nitrogen phosphorus and COD in waste water, result of the test shows, after cultivating 8～12 days, water body total nitrogen, total phosphorus and COD's
Clearance is respectively 86.5～94.8%, 93.4～98.7% and 91.5～95.6%；Periphyton attachment net to water body total nitrogen,
The day clearance of total phosphorus and COD is 0.8～27.8,0.6～32.8 and 2～80mg m respectively-2·d-1.Through 8～12 days
After process, the total nitrogen of waste water, total phosphorus and COD are respectively by initial concentration 40～80,10～15 and 500～800mg before treatment
L-1It is reduced to 5～8,2～4 and 20～50mg L-1, the water after purification can be the offer water such as field irrigation, afforestation.2、
Periphyton attachment net, after the process of continuous 2～3 batches of waste water, while being replaced with newly, gathers in the crops old Zhou Congzao
Class attachment net, it is possible to use as agricultural fertilizer or fishing class aquaculture feedstuff.3, this invention design is simple, with low cost, only needs
There is provided artificial substratum, illumination and the waste water being suitable for just can be properly functioning, there are processing ease, with low cost and Environmental security etc. excellent
Point, is suitable to promote.
Detailed description of the invention
Below in conjunction with specific embodiment, this invention is carried out detailed specific description, but protection scope of the present invention is not
It is confined to following example.
Embodiment 1
Concrete processing method employed in the present embodiment is as follows:
First, select the nylon wire being suitable for periphyton apposition growth to do artificial substratum, the nylon wires of about 30 are (long
A width of 50 × 30cm, nets footpath 1mm) it is fixed on the lakebed that the eutrophic lake littoral zone depth of water is 0.3～0.5m, cultivate 8～15
After it, obtain being attached with the nylon wire of a large amount of periphyton.In the later stage of inoculation periphyton, by from outskirts of a town pig farm
After pig-farm wastewater staticly settles 4～8 hours in diameter and the high cylinder infundibulate sedimentation tank of respectively 1 and 2m, then will be preliminary
The waste water of precipitation moves into the flocculation basin that another specification is identical with size, adds flocculant chitosan and Sargassum in the ratio of 1:2
Acid sodium (0.2～0.5g L-1) process 20～30min, after sewage water filtration net filtration, then according to the initial COD value measured, use
Tap water is diluted to 500～800mg L-1Left and right, obtains the pig-farm wastewater of process to be clean.
Secondly, the endless track pond selecting a height of 4 × 2 × 1.5m of length and width processes pond as pig-farm wastewater and (processes every time
Wastewater flow rate is about process pond total measurement (volume) 2/3), built in sun-drenched outdoor, placed water in the one end processing pond simultaneously
Pump, makes water volume flow rate be about 0.02～0.05m/s.With iron wire, the nylon wire that 20 are inoculated with periphyton is uniformly fixed on
The underwater (vertical with the water surface) of 0.2m, directly utilizes the light source that natural lighting grows as periphyton.With reference to National Environmental
Protection general bureau " water and effluent monitoring analyze method " (2002), measured the total nitrogen of water body, total phosphorus and COD respectively every 4 days.Pass through
Test being repeated several times find, periphyton attachment net is at two batches of pig-farm wastewater of continuous processing, when every batch processing time is 12 days,
The total nitrogen of these two batches of water bodys, total phosphorus, COD clearance respectively up to 91.5 and 94.8%, 96.4 and 95.7%, 92.5 and
96.7%；Periphyton attachment net is 5.8,12.3 and to the day clearance average of water body total nitrogen, total phosphorus and COD respectively
21.6mg·m-2·d-1.The total nitrogen of pig-farm wastewater, total phosphorus and COD are respectively by initial concentration 58,13 and 520mg L before treatment-1It is reduced to 7.3,3.8 and 28mg L-1.Periphyton after processing periodically is gathered in the crops.
Claims (5)
1. one kind utilizes the method that periphyton processes animal farm wastewater, it is characterised in that comprise the following steps: by applicable Zhou Cong
The artificial substratum of algae attachment and easily folding and unfolding is put in natural eutrophication water, and the periphyton in water body is seeded to artificial base
In matter；Pretreated animal farm wastewater is entered in the annular processes pond of outdoor, then will be attached with artificial from algae of week
Substrate is uniformly put in annular processes pond, processes 8～12 days, and the periphyton being seeded on nylon wire can utilize sunlight,
In animal farm wastewater while growth, effectively remove the nitrogen phosphorus in waste water, animal farm wastewater after treatment, wherein total nitrogen, total
The clearance of phosphorus and COD is respectively 86.5～94.8%, 93.4～98.7% and 91.5～95.6%.
The method utilizing periphyton to process animal farm wastewater the most according to claim 1, it is characterised in that specifically include
Following steps: the artificial substratum of the attachment of applicable periphyton and easily folding and unfolding is put into natural eutrophic lake littoral zone by (1)
Under water at 0.2～0.5m, after cultivating 8～15 days, fetching apposition growth has the artificial substratum of a large amount of periphyton stand-by；
(2) by animal farm wastewater after sedimentation tank staticly settles 4～8 hours, the waste water of preliminary sedimentation is moved into flocculation basin, then uses
Sewage flocculant processes, and obtains COD value at 500～800mg L after filter screen filtration-1Process to be clean plant give up
Water；
(3) pretreated animal farm wastewater in step (2) is entered in the annular processes pond of outdoor；
(4) will complete postvaccinal artificial substratum and vertically put in annular processes pond, every day carries out natural lighting, through 8～12
It process after, in water body the clearance of total nitrogen, total phosphorus and COD be respectively 86.5～94.8%, 93.4～98.7% and 91.5～
95.6%；
(5) waste water after being disposed uses as field irrigation, water for afforestation, and is attached with week from the people of algae
Work substrate after the 2～3 batches of animal farm wastewater that are disposed, be drawn off and collect week thereon from algae as agricultural fertilizer or
Fishery cultivating feedstuff uses.
The method utilizing periphyton to process animal farm wastewater the most according to claim 2, it is characterised in that: described people
Work substrate is granite block, PVC board, polythene net or nylon wire.
The method utilizing periphyton to process animal farm wastewater the most according to claim 3, it is characterised in that: described people
Work substrate is nylon wire, its a length of 50～70cm, wide 30～50cm, aperture is 1mm.
The method utilizing periphyton to process animal farm wastewater the most according to claim 2, it is characterised in that: described process
Being provided with water pump in pond, the flow velocity opening water pump control waste water is 0.02～0.05m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610703043.5A CN106242168B (en) | 2016-08-22 | 2016-08-22 | A method of animal farm wastewater is handled using periphyton |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610703043.5A CN106242168B (en) | 2016-08-22 | 2016-08-22 | A method of animal farm wastewater is handled using periphyton |
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| Publication Number | Publication Date |
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| CN106242168A true CN106242168A (en) | 2016-12-21 |
| CN106242168B CN106242168B (en) | 2019-04-02 |
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| CN201610703043.5A Expired - Fee Related CN106242168B (en) | 2016-08-22 | 2016-08-22 | A method of animal farm wastewater is handled using periphyton |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110214653A (en) * | 2019-07-01 | 2019-09-10 | 中国科学院南京土壤研究所 | A method of rice field phosphorus loss is reduced using periphyton |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09141280A (en) * | 1995-11-15 | 1997-06-03 | B Bai B:Kk | Water quality purifying device for water in water area of river or the like |
| CN101885554A (en) * | 2009-05-12 | 2010-11-17 | 上海楚水水产科技有限公司 | Method for treating aquaculture wastewater |
| CN103523927A (en) * | 2013-10-30 | 2014-01-22 | 苏州科技学院 | Low-pollution tail water advanced treatment device |
| WO2016093445A1 (en) * | 2014-12-12 | 2016-06-16 | 경기도 | Apparatus for purifying water using microalgae |
-
2016
- 2016-08-22 CN CN201610703043.5A patent/CN106242168B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09141280A (en) * | 1995-11-15 | 1997-06-03 | B Bai B:Kk | Water quality purifying device for water in water area of river or the like |
| CN101885554A (en) * | 2009-05-12 | 2010-11-17 | 上海楚水水产科技有限公司 | Method for treating aquaculture wastewater |
| CN103523927A (en) * | 2013-10-30 | 2014-01-22 | 苏州科技学院 | Low-pollution tail water advanced treatment device |
| WO2016093445A1 (en) * | 2014-12-12 | 2016-06-16 | 경기도 | Apparatus for purifying water using microalgae |
Non-Patent Citations (2)
| Title |
|---|
| 梁霞等: "周丛藻类水质处理系统中氮、磷污染物去除效果研究", 《环境科学学报》 * |
| 陈重军等: "周丛藻类及其在水质净化中的应用", 《应用生态学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110214653A (en) * | 2019-07-01 | 2019-09-10 | 中国科学院南京土壤研究所 | A method of rice field phosphorus loss is reduced using periphyton |
| CN110214653B (en) * | 2019-07-01 | 2021-06-25 | 中国科学院南京土壤研究所 | Method for reducing phosphorus loss of rice field by using periphyton |
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