CN105347626A - Trench processing system suitable for purifying southern plateau area farmland return water - Google Patents

Trench processing system suitable for purifying southern plateau area farmland return water Download PDF

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Publication number
CN105347626A
CN105347626A CN201510817317.9A CN201510817317A CN105347626A CN 105347626 A CN105347626 A CN 105347626A CN 201510817317 A CN201510817317 A CN 201510817317A CN 105347626 A CN105347626 A CN 105347626A
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water
pond
rice
residence time
submerged plant
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CN201510817317.9A
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CN105347626B (en
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和树庄
常学秀
李俊梅
谭福广
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Yunnan University YNU
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Yunnan University YNU
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Abstract

A trench processing system suitable for purifying southern plateau area farmland return water is provided; a river is divided into four functional sections from upstream to downstream in turn, namely a precipitation pool, a packing pool, a submerged plant purification pool and a water quality restoration pool; the sections are separated by dykes; the water level of the upstream functional sections is higher than that of the downstream functional sections; on the basis of field trenches, and aiming at area characteristics that a southern plateau area is not cold in winter, the trenches have a certain gradient and rainfall is concentrated in summer and autumn, the trenches are appropriately transformed and sectionalized, and a purpose of water quality purification is achieved through precipitation, packing adsorption and conversion and submerged plant purification.

Description

A kind ofly be applicable to the irrigation canals and ditches treatment system purifying farmland, southern highlands return water
Technical field
The present invention relates to farmland water conservancy system regions, be particularly a kind ofly applicable to the irrigation canals and ditches treatment system purifying farmland, southern highlands return water.
Background technology
China farmland adopts broad irrigation mostly, and due to the use of a large amount of fertilizer, in the return water of farmland, often with a certain amount of nitrogen phosphorus, very important to the pollution at lake, water source.But because farmland is widely distributed, the discharge of return water is significantly seasonal, and also by the impact of storm runoff, Pollutant levels are low, and source is wide, greatly, river course becomes main and defeatedly moves approach in water yield change; Add that the treatment and purification of farmland return water lacks stable business models, cause conventional method for the treatment of city waste water to be difficult to gather effect.
For this reason, provide a kind of with low cost, the treatment process for farmland return water of long-term continuous and effective, just seem particularly necessary.
Summary of the invention
For solving above-mentioned prior art Problems existing, the object of the present invention is to provide a kind of irrigation canals and ditches treatment system being applicable to purify farmland, southern highlands return water, based on the irrigation canals and ditches of field, for the southern highlands winter without severe cold (river course does not freeze), irrigation canals and ditches have certain slope (being not less than 0.5/1000th), rainwater concentrates on summer and autumn regional characteristics, warp is to irrigation canals and ditches appropriate reconstruction subregion, through precipitation, filling adsorption conversion, submerged plant purification, reach the object of purification of water quality.
For achieving the above object, technical scheme of the present invention is:
Be applicable to the irrigation canals and ditches treatment system purifying farmland, southern highlands return water,
River course is divided into four functional sections successively from upstream to downstream, is respectively settling tank, filling adsorption treating pond, submerged plant treating pond and quality recovery pond, separates with dykes and dams between each section; Upstream functional section water level higher than downstream functional section,
Described settling tank mean residence time is 8-10 hour, keeps the depth of water to be 0.5-3 rice, adopts Herba Eichhorniae to cover the water surface, reduce dissolved oxygen to below 0.5mg/L simultaneously;
Water body is 70-100 hour at described filler pond mean residence time, keeps the depth of water to be 0.5-3 rice, and filler adopts heavy haydite or centimetre stone, loads thickness higher than water outlet 0.1-0.2 rice, submerge discharging flow; Water surface elevation is lower than settling tank 0.1-0.2 rice; These workshop section's current are in and flood stream mode Inlet and outlet water, rely on filling surface microorganism to carry out denitrification, remove nitre nitrogen in water;
Water body at submerged plant pond mean residence time 30-50 hour, average depth 0.5-1.0 rice, this section of irrigation canals and ditches are used for utilizing submerged plant to purify water, recover dissolved oxygen; Three sections of kind planting submerged plants are divided equally, first paragraph kind hydrilla verticillata, Potamogeton pectinatus L in pond; Second segment kind Haloragidaceae Myriophyllum spicatum, p.malaianus 2 kind of plant; 2 kind of plant spent by 3rd section of kind water caltrop, edible seaweed; By submerged plant pond, dissolved oxygen returns to more than 4mg/L;
Water body is at quality recovery pond mean residence time 70-90 hour; Average depth 1.0-1.5 rice; This section of Main Function is the physical feature recovering water body; Planting submerged plant 6 kinds is planted: hydrilla verticillata, Potamogeton pectinatus L, Haloragidaceae Myriophyllum spicatum, p.malaianus, water caltrop, edible seaweed flower, planting density 5 clumps/meter in pond 2, throw in freshwater mussel, crucian in pond, freshwater mussel throws in density 0.03 kg/m 2; Crucian throws in density 0.05 kg/m 2.
Further, water level discrepancy in elevation 0.1-0.2 rice between every two functional sections, freely flows to water outlet, gross head 0.3-0.5 rice.
Further, the mean residence time of described settling tank water is 9.3 hours.
Further, water body is 78 hours at described filler pond mean residence time.
Further, the proportion of described heavy haydite is 1.05-1.1kg/L.
Further, water body is 39.6 hours at described submerged plant pond mean residence time.
Further, described submerged plant pond submerged plant planting density is 5 clumps/meter 2.
Further, water body was quality recovery pond mean residence time 84 hours.
Further, in upstream, farmland return water is confluxed collection, unifiedly enter treatment system.
Relative to prior art, beneficial effect of the present invention is:
A kind ofly be applicable to the irrigation canals and ditches treatment system purifying farmland, southern highlands return water, based on the irrigation canals and ditches of field, for the southern highlands winter without severe cold (river course does not freeze), irrigation canals and ditches have certain slope (being not less than 0.5/1000th), rainwater concentrates on summer and autumn regional characteristics, warp is to irrigation canals and ditches appropriate reconstruction subregion, through precipitation, filling adsorption conversion, submerged plant purification, reach the object of purification of water quality.Water inlet is through precipitation, filler pond, submerged plant pond, the four-stage water outlet of quality recovery pond, and realize water quality and promote, function of water body recovers.
Accompanying drawing explanation
Fig. 1 is the process flow sheet of present system.
Embodiment
Below in conjunction with the drawings and specific embodiments, technical solution of the present invention is described in further detail:
As shown in Figure 1: be a kind ofly applicable to the irrigation canals and ditches treatment system purifying farmland, southern highlands return water,
River course is divided into four functional sections, is respectively settling tank, filling adsorption treating pond, submerged plant treating pond, quality recovery pond.Isolate with brick wall mutually.
Discrepancy in elevation 0.1-0.2 rice between every two functional zone, freely flows to water outlet, gross head 0.3-0.5 rice.
Farmland return water is suitably confluxed collection, unifiedly enters treatment system.
Water inlet is through precipitation, filler pond, submerged plant pond, the four-stage water outlet of quality recovery pond, and realize water quality and promote, function of water body recovers.
Settling tank
Settling tank mean residence time was by design in 9.3 hours, and the depth of water can control according to practical situation (recommendation 0.7-1.5 rice).Adopt Herba Eichhorniae to cover the water surface, improve sedimentation effect, reduce dissolved oxygen to below 0.5mg/L simultaneously.
Filler pond
Mean residence time 78 hours, the depth of water can control according to practical situation (recommendation 0.6-1.4 rice).Filler adopts heavy haydite (proportion 1.05-1.1kg/L) or centimetre stone.Load thickness higher than water outlet 0.1-0.2 rice, submerge discharging flow.Water level elevation is lower than settling tank 0.1-0.2 rice.These workshop section's current are in and flood stream mode Inlet and outlet water, rely on filling surface microorganism to carry out denitrification, remove nitre nitrogen in water.
Submerged plant pond
Mean residence time 39.6 hours, average depth 0.5-1.0 rice.This section of irrigation canals and ditches are used for utilizing submerged plant to purify water, and recover dissolved oxygen.Three sections of kind planting submerged plants are divided equally in reoxygenation pond, first paragraph kind hydrilla verticillata, Potamogeton pectinatus L, planting density 5 clumps/meter 2.Second segment kind Haloragidaceae Myriophyllum spicatum, p.malaianus 2 kind of plant, planting density 5 clumps/meter 2.2 kind of plant spent by 3rd section of kind water caltrop, edible seaweed, planting density 5 clumps/meter 2.By submerged plant pond, dissolved oxygen returns to more than 4mg/L.
Quality recovery pond
Mean residence time 84 hours.Average depth 1.0-1.5 rice.This section of Main Function is the physical feature recovering water body.Planting submerged plant 6 kinds is planted: hydrilla verticillata, Potamogeton pectinatus L, Haloragidaceae Myriophyllum spicatum, p.malaianus, water caltrop, edible seaweed flower, planting density 5 clumps/meter in pond 2, totally 175 clumps.Throw in freshwater mussel, crucian in pond, freshwater mussel throws in density 0.03 kg/m 2; Crucian throws in density 0.05 kg/m 2.
Table-1 sewerage design variable is selected
Settling tank Filler pond Submerged plant pond Quality recovery pond Add up to
The residence time (h) 9.3 78 39.6 84.4 211.66
Average depth (rice) 0.7-1.5 0.6-1.4 0.5-1.0 1.0-1.5
Through above-mentioned flow process, its decontamination effect improving is as table-2.
Table-2 system average cleanup efficiency
Principle of work of the present invention is:
(1) environmental engineering combines with ecotechnology, economical and effective
Native system have employed precipitation, current wetland, submerged plant purification, biodiversity restoration four process procedures, and existing environment project, also has ecotechnology.
Native system relies on and freely flows promotion, and head requires 0.3-0.5 rice (irrigation canals and ditches total length 50-80 rice, 0.3 meter; 150-200 rice, need control at 0.5 meter), usually can utilize physiographic relief in highlands, without the need to providing man power.
Native system needs 3-5 to draw out cleaning once except filler, non-maintaining at ordinary times, avoids operational cost problem.
Through the observation of nearly 1 year, this technology, except to except COD substantially invalid (purification rate nearly 9.3%), all has good cleaning action to total nitrogen (average cleanup rate 63.4%), ammonia nitrogen (average cleanup rate 43.9%), nitre nitrogen (average cleanup rate 71.0%) and total phosphorus (average cleanup rate 50.9%).
(2) anti impulsion load, can adapt to the change of rain dry-weather discharge greatly, and the runoff purification that change of water quality is large needs
System at the process water yield in rainy season, pollution load apparently higher than dry season.
There will be flow between storm period, pollution load increases phenomenon on foot.Cutout phenomenon is there will be in dry season.
Because southern highlands rainy season is summer and autumn, corresponding temperature is high, and plant, microbial process are strong, can adapt to the problem that the process water yield is large, pollution load is high.Although dry season plant, microbial activities lower (usual irrigation canals and ditches do not have freeze-up phenomenon), pollution load, process the water yield also corresponding less, therefore can adapt to purification requirement.Table-3 is system cloud gray model concentration, residence time variation range
Table-3 system cloud gray model concentration, residence time variation range
Influent quality Total nitrogen (mg/L) Ammonia nitrogen (mg/L) Nitre nitrogen (mg/L) Total phosphorus (mg/L) COD(mg/L) The residence time (h)
Peak concentration 22.8 5.96 18.24 0.58 60 Cutout
Cmin 1.85 0.20 0.22 0.04 9 24
4. the scope of application
(1) waterhead area farming region enters Lake Water lifting
Waterhead area farming region is polluted comparatively light usually, but extensively exists.Enter in the irrigation canals and ditches process of field at runoff, adopt this technology to purify water, significantly can be lifted into lake (storehouse) water quality.
(2) traditional agriculture district farmland return water purification
Traditional agriculture district generally uses chemical fertilizer, and in the return water of farmland, nitre nitrogen content is general higher, and this technology significantly can reduce the nitrate nitrogen in return water, alleviates farmland pollution.
(3) municipal sewage plant's tail water purification
Municipal sewage plant prevalence one-level A marks, and in water outlet, COD is very low, but nitrogen and phosphorus content is still higher, especially nitrate nitrogen.In sewage treatment plant tail water outlet, after adopting the purification of this technology, then entered environment, can water quality be significantly improved.
The above, be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and any change of expecting without creative work or replacement, all should be encompassed within protection scope of the present invention.Therefore, the protection domain that protection scope of the present invention should limit with claims is as the criterion.

Claims (9)

1. be applicable to the irrigation canals and ditches treatment system purifying farmland, southern highlands return water,
It is characterized in that, river course is divided into four functional sections successively from upstream to downstream, be respectively settling tank, filling adsorption treating pond, submerged plant treating pond and quality recovery pond, separate with dykes and dams between each section; Upstream functional section water level higher than downstream functional section,
Described settling tank mean residence time is 8-10 hour, keeps the depth of water to be 0.5-3 rice, adopts Herba Eichhorniae to cover the water surface, reduces dissolved oxygen to below 0.5mg/L simultaneously;
Water body is 70-100 hour at described filler pond mean residence time, keeps the depth of water to be 0.5-3 rice, and filler adopts heavy haydite or centimetre stone, loads thickness higher than water outlet 0.1-0.2 rice, submerge discharging flow; Water surface elevation is lower than settling tank 0.1-0.2 rice; These workshop section's current are in and flood stream mode Inlet and outlet water, rely on filling surface microorganism to carry out denitrification, remove nitre nitrogen in water;
Water body at submerged plant pond mean residence time 30-50 hour, average depth 0.5-1.0 rice, this section of irrigation canals and ditches are used for utilizing submerged plant to purify water, recover dissolved oxygen; Three sections of kind planting submerged plants are divided equally, first paragraph kind hydrilla verticillata, Potamogeton pectinatus L in pond; Second segment kind Haloragidaceae Myriophyllum spicatum, p.malaianus 2 kind of plant; 2 kind of plant spent by 3rd section of kind water caltrop, edible seaweed; By submerged plant pond, dissolved oxygen returns to more than 4mg/L;
Water body is at biodiversity restoration pond mean residence time 70-90 hour; Average depth 1.0-1.5 rice; This section of Main Function is the physical feature recovering water body; Planting submerged plant 6 kinds is planted: hydrilla verticillata, Potamogeton pectinatus L, Haloragidaceae Myriophyllum spicatum, p.malaianus, water caltrop, edible seaweed flower, planting density 5 clumps/meter in pond 2, throw in freshwater mussel, crucian in pond, freshwater mussel throws in density 0.03 kg/m 2; Crucian throws in density 0.05 kg/m 2.
2. system according to claim 1, is characterized in that, water level discrepancy in elevation 0.1-0.2 rice between every two functional sections, freely flows to water outlet, gross head 0.3-0.5 rice.
3. system according to claim 1, is characterized in that, the mean residence time of described settling tank water is 9.3 hours.
4. system according to claim 1, is characterized in that, water body is 78 hours at described filler pond mean residence time.
5. system according to claim 1, is characterized in that, the proportion of described heavy haydite is 1.05-1.1kg/L.
6. system according to claim 1, is characterized in that, water body is 39.6 hours at described submerged plant pond mean residence time.
7. system according to claim 1, is characterized in that, described submerged plant pond submerged plant planting density is 5 clumps/meter 2.
8. system according to claim 1, is characterized in that, water body was biodiversity restoration pond mean residence time 84 hours.
9. system according to claim 1, is characterized in that, to conflux collection to farmland return water in upstream, unifiedly enters treatment system.
CN201510817317.9A 2015-11-23 2015-11-23 A kind of irrigation canals and ditches processing system suitable for purifying southern highlands farmland return water Active CN105347626B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106145518A (en) * 2016-07-15 2016-11-23 环境保护部华南环境科学研究所 A kind of immobilized microorganism plant society ecological treatment system and application
CN108117184A (en) * 2016-11-30 2018-06-05 深圳市国沅生态环保科技有限公司 A kind of sewage disposal device

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CN102219332A (en) * 2010-04-15 2011-10-19 上海欧保环境科技有限公司 Novel technology for treating domestic sewage in rural area
CN102336500A (en) * 2011-07-28 2012-02-01 农业部规划设计研究院 Rural domestic sewage treatment system suitable for northern part of China and technology thereof
CN102351376A (en) * 2011-07-08 2012-02-15 中国科学院水生生物研究所 Riverbank multiple pond wetland waste sewage treatment method and device
CN204569676U (en) * 2015-04-20 2015-08-19 中科嘉亿生态工程技术有限公司 A kind of WOPM multistage coupling High-efficient Water advanced treatment system

Patent Citations (5)

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Publication number Priority date Publication date Assignee Title
CN1580415A (en) * 2004-05-18 2005-02-16 中国科学院南京地理与湖泊研究所 Composite wet land artesian polluted river water purifying method
CN102219332A (en) * 2010-04-15 2011-10-19 上海欧保环境科技有限公司 Novel technology for treating domestic sewage in rural area
CN102351376A (en) * 2011-07-08 2012-02-15 中国科学院水生生物研究所 Riverbank multiple pond wetland waste sewage treatment method and device
CN102336500A (en) * 2011-07-28 2012-02-01 农业部规划设计研究院 Rural domestic sewage treatment system suitable for northern part of China and technology thereof
CN204569676U (en) * 2015-04-20 2015-08-19 中科嘉亿生态工程技术有限公司 A kind of WOPM multistage coupling High-efficient Water advanced treatment system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106145518A (en) * 2016-07-15 2016-11-23 环境保护部华南环境科学研究所 A kind of immobilized microorganism plant society ecological treatment system and application
CN106145518B (en) * 2016-07-15 2019-02-19 环境保护部华南环境科学研究所 A kind of immobilized microorganism-plant society ecological treatment system and application
CN108117184A (en) * 2016-11-30 2018-06-05 深圳市国沅生态环保科技有限公司 A kind of sewage disposal device

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