CN1268557C - Water culture pasture grass filtering method for sewage of circulating water aquaculture system and plant filter - Google Patents
Water culture pasture grass filtering method for sewage of circulating water aquaculture system and plant filter Download PDFInfo
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- CN1268557C CN1268557C CNB2004100254061A CN200410025406A CN1268557C CN 1268557 C CN1268557 C CN 1268557C CN B2004100254061 A CNB2004100254061 A CN B2004100254061A CN 200410025406 A CN200410025406 A CN 200410025406A CN 1268557 C CN1268557 C CN 1268557C
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
Abstract
The present invention discloses a sewage filtering method for an aquaculture system with circular running water by using water culture pasture grass, and a plant filter, which is used for purifying solid-enriched sewage which is from the settling area of the settling pond of the aquaculture system with circular running water or is generated by the backwashing of a biological filter. Input sewage is mechanically filtered by a composite filtering layer of a seedling-raising disc for planting the water culture pasture grass so that most of solids in the sewage are remained in the seedling-raising disc, the sewage is periodically treated, the filtered waste water downwards permeates to a cultivation groove and flows to a waste water barrel, a water pump controlled by a relay pumps the waste water in the waste water barrel according to a certain working period so as to circularly irrigate the pasture grass, roots of the pasture grass absorb nutritive matters, such as nitrogen, phosphorus, etc., in the waste water and simultaneously further intercept and adsorb the solids, after the waste water meets treating requirements, the pH of the waste water is increased, and the purified waste water back flows to the aquaculture system with circular running water so as to solve the problem of pH reduction caused by the nitrification of the biological filter so that the cultivation with zero discharge is finally realized.
Description
Technical field
The present invention relates to the treatment process of sewage, especially relate to a kind of recirculating aquaculture system wastewater aquaculture herbage filter method and plant filter.
Background technology
Compare with traditional aquaculture mode, under same occupation of land or water consumption, the high-density industrialized aquiculture can access higher output, and the key of this type systematic operation is in time to get rid of metabolism product and residual feed.The country that is having abundant water resources; if law allows then can achieve the goal by changing water in a large number; and the place of or environment protection legislation strictness limited in water resources; the recirculating aquaculture that is feature with the processing and the recycling of water is the main means that realize high density production, also is the only way that aquaculture realizes Sustainable development.The effect of water technology has restricted the water quality condition and the throughput of whole cultivating system, the water technology of aquaculture roughly is divided into types such as mechanical filter, gravity separation, chemical filter, biological filter, denitrogenation filter and plant filter, the different technologies function difference is very big, and the total system that the division of labor, mutual supplement with each other's advantages are arranged mutually is the main flow of development.
The water treatment system of general recirculating aquaculture system is core with the biological filter, utilize the nitrification of bacterium to control metabolism products such as bigger ammonia of toxicity and nitrite, but also cause counter productives such as nitrates accumulation, the reduction of pH value simultaneously, though the denitrogenation filter can reduce nitrate, be easy to generate the accumulation of nitrite; Mechanical filters such as settling tank can alleviate the burden of biological filter effectively, but settling region cumulative solids can constantly decompose, consume dissolved oxygen and produce new pollutent, maintenance service such as need frequently remove contamination, to the very high sewage of external world's discharging solids concentration, cause environmental stress inevitably.In addition, also can produce large amount of sewage during the biological filter back flushing, wherein be rich in the solidss such as microbial film that come off.
With some algae is that the single result of use of plant filter of medium is lower, be used in combination with biological filter to absorb the dissolved pollutent, but powerless to the accumulation of solids.Big both at home and abroad quantity research with aquiculture waste water directly or be used for the production of plants such as vegetables, flowers, grass, trees after transforming but because the rarely seen backflow utilization in back is handled in the restriction of planting type, all can not be integrated into recirculating aquaculture system.Economically feasible, zero-discharge technology research safely and efficiently and breakthrough have become the key that recirculating aquaculture is thoroughly realized Sustainable development.
Summary of the invention
In order to solve the nitrate nitrogen (NO that (a) biological filter causes in the recirculating aquaculture system
3 --N), the accumulation of phosphorus (P) etc.; (b) decline of the potential of hydrogen (pH) that causes of biological filter; (c) the high-concentration sewage discharging that produces of settling tank settling region or biological filter back flushing and cause technical problem such as environmental pollution, the object of the present invention is to provide a kind of recirculating aquaculture system wastewater aquaculture herbage filter method and plant filter, be integrated in the recirculating aquaculture system, the sewage utilization that refluxes after treatment realizes zero discharge culture.
The technical solution adopted for the present invention to solve the technical problems is:
One, filter method of the present invention:
Utilize the sewage that is rich in solids of water planting forage grass filter purification from recirculating aquaculture system settling tank settling region or biological filter back flushing generation, by sewage transport main and sewage transport arm sewage is input in the plant filter cultivation bed near cultivation bed is high-end and is implanted with in the seedling pan of water planting herbage for M kind of starting point, seedling pan is from top to down successively by the cauline leaf of herbage, bed course, the seedling pan bottom surface, the composite filter that root system net of herbage and cultivation bed groove face are formed is finished the mechanical filter to input sewage, promptly most solidss in the sewage are stayed in the seedling pan, regularly handle, infilter into cultivation bed under the waste water after the filtration and flow to wastewater barrel, extract the waste water cyclic irrigation herbage of wastewater barrel by certain work period by the water pump of rly. control, by the nitrogen in the root system absorption waste water of herbage, nutrition such as phosphorus, further interception simultaneously, the absorption solids, after waste water reaches processing requirements, the pH value of waste water raises, be back in the recirculating aquaculture system pH value reduction problem that the nitrification that solves biological filter causes, finally realize zero discharge culture.
Two, plant filter of the present invention:
Comprise the cultivation bed that tilts with certain slope, place the bottom surface in the cultivation bed and have N the seedling pan that small through hole, interior kind are implanted with herbage, water pump one end by rly. control is connected with wastewater barrel through feedwater line, its the other end of water pump is connected through feedwater line and cultivation bed are high-end, the cultivation bed low side is connected with wastewater barrel through discharge pipe line, from high-end for being connected to the sewage transport arm respectively on M the sewage transport main above the seedling pan of starting point near cultivation bed.
In plant between the root system net of cauline leaf, bed course, seedling pan bottom surface, herbage that N seedling pan being implanted with herbage be followed successively by herbage from top to down and cultivation bed groove face and form composite filter.
It is 1%～5% that the certain slope of said cultivation bed tilts.
Said N is the sum of seedling pan in the plant filter, and M is the quantity that is connected to the seedling pan of sewage transport arm (9), N 〉=M, and M determines according to pending sewage input.
The useful effect that the present invention has is:
1. composite filter carries out mechanical filter to the sewage of input, and most solidss are stayed in the seedling pan, oozes under the waste water finally to enter wastewater barrel;
2. solids is further tackled, adsorbed to the waste water cyclic irrigation herbage in the wastewater barrel by nutrition such as the nitrogen in the root system absorption waste water of herbage, phosphorus, simultaneously, reaches processing requirements behind the certain hour;
3. the wastewater pH of finishing after the purification raises, and is back to the problem that solves the reduction of pH value in the recirculating aquaculture system, finally realizes zero discharge culture.
The present invention is mainly used in the recirculating aquaculture system, the sewage that contains the high concentrated, solid thing that produces when handling from settling tank settling region or biological filter back flushing.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is a vertical view of the present invention;
Fig. 2 is an A-A sectional view of the present invention;
Fig. 3 is a composite filter synoptic diagram of the present invention.
Among the figure: 1. cultivation bed 2. kind is implanted with the seedling pan of herbage, 3. wastewater barrel, 4. water pump, 5. rly., 6. feedwater line, 7. discharge pipe line, 8. sewage transport main, 9. sewage transport arm, 10. return line, 11. the cauline leaf of herbage, 12. bed courses, 13. seedling pan bottom surfaces, 14. the root system net of herbage, 15. cultivation bed groove faces.
Embodiment
As Fig. 1, Fig. 2, shown in Figure 3, the present invention includes the cultivation bed 1 that tilts with certain slope, place the bottom surface in the cultivation bed 1 and have N the seedling pan 2 that small through hole, interior kind are implanted with herbage, water pump 4 one ends by rly. 5 controls are connected with wastewater barrel 3 through feedwater line 6, water pump 4 its other ends are through feedwater line 6 and 1 high-end connection of cultivation bed, cultivation bed 1 low side is connected with wastewater barrel 3 through discharge pipe line 7, from high-end for being connected to sewage transport arm 9 respectively on the sewage transport main 8 above M the seedling pan 2 of starting point near cultivation bed 1.
As shown in Figure 3, interior kind N seedling pan 2 being implanted with herbage is followed successively by cauline leaf 11, bed course 12, the seedling pan bottom surface 13 of herbage from top to down, root system net 14 and 15 of the cultivation bed groove faces of herbage forms composite filter.
The certain slope of said cultivation bed tilts to be 1%-5%.Said N is the sum of seedling pan in the plant filter, and M is the quantity that is connected to the seedling pan of sewage transport arm 9, N 〉=M, and M determines according to pending sewage input.
The sewage of recirculating aquaculture system (settling tank settling region sewage or biological filter backwashing sewage water) is transported in the seedling pan 2 of plant filter by sewage transport main 8 and sewage transport arm 9, finish mechanical filter by composite filter, promptly most solidss in the sewage are stayed in the seedling pan, regularly handle, infilter into cultivation bed 1 under the waste water and flow to wastewater barrel 3.Extract the waste water cyclic irrigation herbage of wastewater barrel 3 by the water pump 4 of rly. 5 control according to certain work period, the root system net 14 by herbage absorbs nutrition such as nitrogen in the waste water, phosphorus, also can further tackle, adsorb simultaneously solids.Through behind the specified time, waste water quality reaches particular requirement and is delivered to recirculating aquaculture system by return line 10 to be reused.Because the nitrification of biological filter is from the on the low side and NO of sewage pH of recirculating aquaculture system
3 -Concentration is higher.And in plant filter, herbage absorption of N O
3 -The time, by the HCO of ion-exchange to growing environment release equivalent
3 -Thereby, wastewater pH is raise.Therefore, not only can remove pollutent, and purifying waste water of high pH value is back to the problem that can solve the reduction of pH value in the cultivating system by plant filter.
Growing seedlings of water planting herbage utilizes formula nutritional liquid to carry out in the plant filter of same configuration, and the grass-seed amount of broadcasting is generally 25-40gm
-2In the cultivating process, trophotaxis makes grass roots system pass bed course 12 and seedling pan bottom surface 13 apertures, contacts with cultivation groove face 15, and along with the increase at growth age, root system is flourishing day by day, at certain thickness " the root system net " 14 of formation of trying to get to the heart of a matter.
As shown in Figure 1, cultivation bed 1 wide 0.55m, long 6m, the groove face gradient 2%; Totally 20 coil the water planting Festuca Arundinaceas, thickness of sowing is every dish 5g, careless area 2.55m
2, the natural plant height degree is about 20cm; Seedling pan 2 specifications are: high 60mm, and 540 * 280mm suitable for reading, bottom surface 510 * 250mm, thick 0.7mm contains 288 7 * 7mm small square holes, and hole area is 11.1% of the total area; Non-woven fabrics bed course 12 in the seedling pan 2 adopts 3 layers of non-woven fabrics (specification is 20g); Wastewater barrel adopts the 250L plastic cylinder; Water pump 4 is: 750W, and 80L/min, rly. 5 is: the DH48S-S type time relay, water pump be the loop cycle work to stop 30min, to open 1min under the control of rly.; Feedwater line 6 adopts Φ 32PVC pipe, and discharge pipe line 7 adopts Φ 50PVC pipe.Sewage is cultured 4.87kg/m from the settling region of a recirculating aquaculture system settling tank in the system
3Colossoma brachypomum carries main 8 and sewage transport arm 9 to adopt Φ 32PVC pipe, by water pump with sewage transport to preceding 5 seedling pans of plant filter, every day 34.3L.Return line 10 adopts Φ 32PVC pipe, refluxes once in per 4 days.
Moved for 4 weeks, treatment effect sees Table 1, and the pH value is elevated to 8.51 from 7.12.
Table 1 plant filter (2.55m
2Herbage) to the treatment effect of breeding wastewater
| Water quality parameter | Input/mgday -1 | Absorption/mgday -1 | Treatment effect/% |
| Nitrate nitrogen (NO 3 --N) | 394.5±19.1 | 360.6±26.9 | 91.4 |
| Nitrite nitrogen (NO 2 --N) | 6.5±3.8 | 6.4±3.8 | 97.7 |
| Total ammonia nitrogen (TAN) | 51.2±2.8 | 34.8±3.6 | 67.9 |
| Total inorganic nitrogen (TION) | 452.2±18.2 | 401.7±24.6 | 88.8 |
| Total nitrogen (TN) | 973±94 | 874±102 | 89.8 |
| Total phosphorus (TP) | 614.0±37.9 | 536.6±42.8 | 87.4 |
| Chemical oxygen demand (COD) (CODcr) | 3552±161 | 2545±158 | 71.6 |
| Suspended substance (SS) | 22752±3876 | 22476±3811 | 98.8 |
Claims (5)
1. recirculating aquaculture system wastewater aquaculture herbage filter method, it is characterized in that: utilize the sewage that is rich in solids of water planting forage grass filter purification from recirculating aquaculture system settling tank settling region or biological filter back flushing generation, by sewage transport main (8) and sewage transport arm (9) sewage is input in the plant filter cultivation bed (1) near cultivation bed (1) is high-end and is implanted with in the seedling pan (2) of water planting herbage for M kind of starting point, seedling pan (2) is from top to down successively by the cauline leaf (11) of herbage, bed course (12), seedling pan bottom surface (13), the root system net (14) of herbage is finished importing the mechanical filter of sewage with the composite filter that cultivation bed groove face (15) is formed, promptly most solidss in the sewage are stayed in the seedling pan, regularly handle, infilter into cultivation bed under the waste water after the filtration and flow to wastewater barrel (3), extract the waste water cyclic irrigation herbage of wastewater barrel (3) by certain work period by the water pump (4) of rly. (5) control, by the nitrogen in the root system absorption waste water of herbage, nutrition such as phosphorus, further interception simultaneously, the absorption solids, after waste water reaches processing requirements, the pH value of waste water raises, be back in the recirculating aquaculture system pH value reduction problem that the nitrification that solves biological filter causes, finally realize zero discharge culture.
2. the plant filter that is used for the described a kind of recirculating aquaculture system wastewater aquaculture herbage filter method of claim 1, it is characterized in that: comprise the cultivation bed (1) that tilts with certain slope, place the bottom surface in the cultivation bed (1) and have small through hole, interior N the seedling pan (2) that is implanted with herbage of planting, water pump (4) one end by rly. (5) control is connected with wastewater barrel (3) through feedwater line (6), its the other end of water pump (4) is through feedwater line (6) and high-end connection of cultivation bed (1), cultivation bed (1) low side is connected with wastewater barrel (3) through discharge pipe line (7), from high-end for being connected to sewage transport arm (9) respectively on the sewage transport main (8) above M the seedling pan (2) of starting point near cultivation bed (1).
3. the plant filter of a kind of recirculating aquaculture system wastewater aquaculture herbage filter method according to claim 2 is characterized in that: N the seedling pan (2) that interior kind is implanted with herbage is followed successively by from top to down between the root system net (14) of cauline leaf (11), bed course (12), seedling pan bottom surface (13), herbage of herbage and cultivation bed groove face (15) and forms composite filter.
4. the plant filter of a kind of recirculating aquaculture system wastewater aquaculture herbage filter method according to claim 2 is characterized in that: the certain slope of said cultivation bed tilts to be 1%-5%.
5. the plant filter of a kind of recirculating aquaculture system wastewater aquaculture herbage filter method according to claim 2, it is characterized in that: said N is the sum of seedling pan in the plant filter, M is the quantity that is connected to the seedling pan of sewage transport arm (9), N 〉=M, M determines according to pending sewage input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100254061A CN1268557C (en) | 2004-06-17 | 2004-06-17 | Water culture pasture grass filtering method for sewage of circulating water aquaculture system and plant filter |
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| CNB2004100254061A CN1268557C (en) | 2004-06-17 | 2004-06-17 | Water culture pasture grass filtering method for sewage of circulating water aquaculture system and plant filter |
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| CN1594141A CN1594141A (en) | 2005-03-16 |
| CN1268557C true CN1268557C (en) | 2006-08-09 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100448342C (en) * | 2006-01-20 | 2009-01-07 | 中国科学院南京土壤研究所 | Ecological intercepting method of vegetable field soil nitrogen phosphorus runoff control |
| CN101100336B (en) * | 2006-07-07 | 2011-02-02 | 中国科学院大连化学物理研究所 | Method for purifying sea animal cultivation sewage |
| CN102210245A (en) * | 2010-04-07 | 2011-10-12 | 方炜 | Compound plant factory combining carbon source and/or nitrogen source facilities |
| CN104062404B (en) * | 2014-06-09 | 2015-10-07 | 三峡大学 | Measure the experimental provision of sewage purifying plant efficiency |
| CN104591395B (en) * | 2015-01-27 | 2016-06-29 | 河海大学 | Plains region fills the water saving of row's coupling Ecological Irrigation District water circulation use and subtracts dirty method |
| CN110432131B (en) * | 2019-07-11 | 2021-10-19 | 江苏农林职业技术学院 | Ecological lawn poplar floor and manufacturing method |
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