CN112759077A - Method for ecologically restoring water in rivers and lakes - Google Patents
Method for ecologically restoring water in rivers and lakes Download PDFInfo
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- CN112759077A CN112759077A CN202011473414.8A CN202011473414A CN112759077A CN 112759077 A CN112759077 A CN 112759077A CN 202011473414 A CN202011473414 A CN 202011473414A CN 112759077 A CN112759077 A CN 112759077A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 192
- 238000000034 method Methods 0.000 title claims abstract description 22
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 95
- 239000001301 oxygen Substances 0.000 claims abstract description 95
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 95
- 238000000746 purification Methods 0.000 claims abstract description 38
- 238000007667 floating Methods 0.000 claims abstract description 19
- 238000005516 engineering process Methods 0.000 claims abstract description 16
- 238000012544 monitoring process Methods 0.000 claims abstract description 16
- 239000012528 membrane Substances 0.000 claims abstract description 14
- 238000007599 discharging Methods 0.000 claims abstract description 13
- 239000010865 sewage Substances 0.000 claims description 105
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 24
- 239000000945 filler Substances 0.000 claims description 24
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 20
- 229910052698 phosphorus Inorganic materials 0.000 claims description 20
- 239000011574 phosphorus Substances 0.000 claims description 20
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 14
- 239000003344 environmental pollutant Substances 0.000 claims description 13
- 231100000719 pollutant Toxicity 0.000 claims description 13
- 241000169203 Eichhornia Species 0.000 claims description 12
- 238000012258 culturing Methods 0.000 claims description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims description 12
- 230000015556 catabolic process Effects 0.000 claims description 11
- 238000006731 degradation reaction Methods 0.000 claims description 11
- 238000009434 installation Methods 0.000 claims description 11
- 239000004952 Polyamide Substances 0.000 claims description 9
- 239000002131 composite material Substances 0.000 claims description 9
- 239000000835 fiber Substances 0.000 claims description 9
- 244000005700 microbiome Species 0.000 claims description 9
- 229920002647 polyamide Polymers 0.000 claims description 9
- 229920002635 polyurethane Polymers 0.000 claims description 9
- 239000004814 polyurethane Substances 0.000 claims description 9
- 230000004888 barrier function Effects 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 238000005273 aeration Methods 0.000 claims description 7
- 230000004907 flux Effects 0.000 claims description 7
- 229910021529 ammonia Inorganic materials 0.000 claims description 6
- 244000052616 bacterial pathogen Species 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 6
- 238000003973 irrigation Methods 0.000 claims description 6
- 230000002262 irrigation Effects 0.000 claims description 6
- 239000008213 purified water Substances 0.000 claims description 6
- 238000005070 sampling Methods 0.000 claims description 6
- 239000002957 persistent organic pollutant Substances 0.000 claims description 5
- 239000002344 surface layer Substances 0.000 claims description 5
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 4
- 230000032770 biofilm formation Effects 0.000 claims description 4
- 230000000593 degrading effect Effects 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 241000894007 species Species 0.000 claims description 4
- 238000009423 ventilation Methods 0.000 claims description 2
- 230000008929 regeneration Effects 0.000 claims 1
- 238000011069 regeneration method Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 230000006872 improvement Effects 0.000 abstract description 3
- 238000000465 moulding Methods 0.000 abstract description 3
- 240000003826 Eichhornia crassipes Species 0.000 abstract 1
- 238000001179 sorption measurement Methods 0.000 description 6
- 239000010410 layer Substances 0.000 description 5
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000001737 promoting effect Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 3
- 230000036284 oxygen consumption Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- WHBMMWSBFZVSSR-UHFFFAOYSA-N 3-hydroxybutyric acid Chemical compound CC(O)CC(O)=O WHBMMWSBFZVSSR-UHFFFAOYSA-N 0.000 description 2
- 241000143060 Americamysis bahia Species 0.000 description 2
- 241000589651 Zoogloea Species 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009395 breeding Methods 0.000 description 2
- 230000001488 breeding effect Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 241000195493 Cryptophyta Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000009615 deamination Effects 0.000 description 1
- 238000006481 deamination reaction Methods 0.000 description 1
- 238000006114 decarboxylation reaction Methods 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- 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
- C02F3/30—Aerobic and anaerobic processes
-
- 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
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
- C02F3/102—Permeable membranes
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic 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
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
-
- 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
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/40—Protecting water resources
- Y02A20/402—River restoration
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biotechnology (AREA)
- Botany (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses a method for ecologically restoring water in rivers and lakes, which comprises the following steps: step one, draining and irrigating a canal; step two, setting up an ecological soft enclosure; step three, arranging a water outlet; step four, installing an oxygen-enriched biological membrane; fifthly, installing a low-flux oxygen-enriched hose); step six, molding in a biochemical treatment environment; step seven: cultivating water hyacinth; step eight: setting an ecological floating island; step nine: setting water quality monitoring points; step ten: and (5) discharging. The water body repaired by the oxygen-enriched biomembrane technology fundamentally eliminates external and internal factors causing black and odorous river channels, has the capacity of resisting pollution impact and recovers the self-purification capacity of the main water body; the oxygen-enriched biomembrane technology has good operation in the sewage-receiving black and odorous water body, has obvious water quality improvement effect, indicates a technical direction for eliminating the black and odorous water body of the sewage-receiving black and odorous water body which can not intercept the sewage-receiving pipe, and provides a complete and mature solution.
Description
Technical Field
The invention relates to the field of sewage treatment, in particular to a method for ecologically restoring water in rivers and lakes.
Background
According to the monitoring result of the river water quality of the central section of the thin river county, the river water quality is of a poor V type, wherein ammonia nitrogen, COD (chemical oxygen demand), total phosphorus, organic pollution sources, phosphorus-containing compounds and the like seriously exceed standards, and the formation reason of the organic pollutants is mainly that untreated incoming water and produced household garbage at the upstream of the river are flushed into the river through rainfall.
The dissolved oxygen consumption in the organic pollutant decomposition process is large, and the oxygen consumption of the water body far exceeds the oxygen recovery amount, so that the water body is anoxic. Organic pollutants in an anoxic water body are subjected to anaerobic decomposition reaction, which inevitably causes the generation of volatile and peculiar-smell small-molecule gases such as CH4, H2S, NH3 and the like, organic matters such as amino acid and the like are subjected to deamination, decarboxylation and other reactions in water to generate a large amount of thioether compounds in water, and once the content of the organic matters exceeds the water body load level, the river water body is blacked and smelled.
Disclosure of Invention
The invention aims to provide a method for ecologically restoring water in rivers and lakes, which aims to solve the problem that the water is anoxic because the oxygen consumption of the water is far beyond the oxygen recovery amount in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for ecologically restoring water in rivers and lakes comprises the following steps:
step one, draining and irrigating a canal: the domestic sewage is discharged in a centralized way, the sewage and the domestic sewage are discharged to a drainage and irrigation channel, and the sewage is collected by an interception weir;
step two, setting an ecological soft enclosure: ecological soft barriers are installed along two banks of a river, so that sewage is isolated from river water to form a sewage purification corridor;
step three, water outlet setting: the distance between the water outlet of the sewage purification corridor and the sewage outlet is about 50 meters;
step four, installing the oxygen-enriched biomembrane: arranging an oxygen-enriched biomembrane in the sewage purification corridor; the oxygen-enriched biomembrane comprises nanoscale polyurethane polyamide with an oxygen affinity characteristic and a composite fiber membrane, and is formed by adopting a dynamic natural culture biofilm formation by combining a low-flux oxygen enrichment technology; so that species with higher affinity and stronger degradation to pollutants in water form dominant strains on the oxygen-enriched biomembrane;
step five, installing a low-flux oxygen-enriched hose: the oxygen-enriched biomembrane is attached to the low-flux oxygen-enriched hose; the low-flux oxygen-enriched hose is arranged at the bottom end of the river channel, the ventilation quantity is controlled to be 0.3-0.35/(m.h) by adjusting the aperture ratio of the low-flux oxygen-enriched hose, the bottom mud stirring caused by bubbles is reduced to the minimum, and oxygen is transmitted to the surface layer of the bottom mud and the overlying water body under the condition of micro-stirring;
step six, biochemical treatment environment forming: biological filler is put into the sewage purification corridor, and isolated sewage forms an alternate aerobic and anaerobic biochemical treatment environment along the sewage flow direction, so that organic pollution degradation, nitrogen and phosphorus removal in the sewage are promoted; the biological filler adopts a hollow spherical filler, and removes organic pollutants, pathogenic bacteria and part of ammonia and phosphorus in the sewage by using anaerobic microorganisms attached to the inner surface and the outer surface of the hollow spherical filler;
step seven: culturing water hyacinth: culturing water hyacinth in the sewage purification corridor within the range of 250 meters from the latter half section to the water outlet and the length of 800 meters;
step eight: setting an ecological floating island: an ecological floating island is arranged at a water outlet section of 300 meters, so that the output of nitrogen and phosphorus in the water body is enhanced;
step nine: setting water quality monitoring points: arranging a water quality monitoring point on the sewage purification corridor;
step ten: discharging: discharging the purified water;
step eleven: and (3) detecting the quality of the discharged water: and carrying out water quality sampling detection on the discharged water.
As a further scheme of the invention: the aeration flux setting range of the low flux oxygen-enriched hose is 0.2-0.7 (m.h).
As a further scheme of the invention: the oxygen-enriched biomembrane comprises 45-50% of nano polyurethane polyamide, 4-9% of composite fiber membrane, 3-4% of magnetic nano fe3o4 particles and 6-8% of strong hydrophilic master batch.
As a further scheme of the invention: the installation position of the ecological soft barricade is 2 meters away from the river bank.
As a further scheme of the invention: the low-flux reoxygenation hose releases oxygen to the overlying water body and the oxygen-enriched biomembrane group, so that the speed of absorbing, degrading and converting pollutants in water by the biomembrane is increased, and the biological layer attached to the surface is promoted to be updated.
As a further scheme of the invention: the design and installation density of the ecological floating island is 8% -9% of the water surface of the river.
As a further scheme of the invention: and two water quality monitoring points are arranged at the middle section and the water outlet of the sewage purification corridor.
Compared with the prior art, the invention has the beneficial effects that:
the oxygen-enriched biomembrane technology provides enough oxygen and improves the concentration of the oxygen, so that the dissolved oxygen is diffused into the inner oxygen-enriched biomembrane of the membrane as much as possible to be in a complete aerobic state, and the water body repaired by the oxygen-enriched biomembrane technology fundamentally eliminates external and internal factors causing black and odorous river channels, has the capacity of resisting pollution impact and recovers the self-purification capacity of the main water body;
the oxygen-enriched biomembrane technology has good operation in the sewage-receiving black and odorous water body, has obvious water quality improvement effect, indicates a technical direction for eliminating the black and odorous water body of the sewage-receiving black and odorous water body which can not intercept the sewage-receiving pipe, and provides a complete and mature solution.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Example 1
The application of the oxygen-enriched biomembrane technology in the experimental model comprises the following steps:
the method comprises the steps of establishing an experimental water body model, wherein the experimental water body model is established by referring to a polluted river outflow water body, local residents build densely houses along a river, no sewage collecting pipe is arranged, most of peripheral residents belong to external workers, environmental protection awareness is basically avoided, domestic sewage and excrement are directly discharged into the river, and then the ecological restoration system structure is installed in the experimental water body model.
A method for ecologically restoring water in rivers and lakes comprises the following steps:
step one, draining and irrigating a canal: the domestic sewage is discharged in a centralized way, the river sewage and the domestic sewage are discharged to a drainage and irrigation channel, and the sewage is collected by an interception weir;
step two, setting an ecological soft enclosure: designing and installing ecological soft barriers along two banks of a river, wherein the installation position of the ecological soft barriers is 2 meters away from the experimental water model river bank, and separating sewage from the experimental water model river water to form a sewage purification corridor;
step three, water outlet setting: the distance between the water outlet of the sewage purification corridor and the sewage outlet is about 50 meters;
step four, installing the oxygen-enriched biomembrane: arranging an oxygen-enriched biomembrane in the sewage purification corridor; the oxygen-enriched biomembrane comprises nanoscale polyurethane polyamide with an oxygen affinity characteristic and a composite fiber membrane, and is formed by adopting a dynamic natural culture biofilm formation by combining a low-flux oxygen enrichment technology; so that species with higher affinity and stronger degradation to pollutants in water form dominant strains on the oxygen-enriched biomembrane; in the example, the oxygen-enriched biomembrane comprises 45-50% of nano polyurethane polyamide, 4-9% of composite fiber membrane, 3-4% of magnetic nano fe3o4 particles and 6-8% of strong hydrophilic master batch.
Step five, installing a low-flux oxygen-enriched hose: the aeration flux setting range of the low-flux oxygen-enriched hose is 0.2-0.7 (m.h), the low-flux oxygen-enriched hose is installed at the bottom end of an experimental water model river channel, the aeration flux is controlled to be 0.3-0.35/(m.h) by adjusting the aperture ratio of the low-flux oxygen-enriched hose, the stirring of bottom mud caused by bubbles is reduced to the minimum, oxygen is transmitted to the surface layer of the bottom mud and the overlying water body under the condition of micro stirring, the oxygen released by the low-flux reoxygenation hose to the overlying water body and the oxygen-enriched biomembrane group is promoted, the speed of absorbing, degrading and converting pollutants in water by the biomembrane is increased, and the biological layer attached to the surface is promoted to be updated;
step six, biochemical treatment environment forming: putting biological filler in the sewage purification corridor, forming alternate aerobic and anaerobic biochemical treatment environment for the isolated sewage along the sewage flow direction, promoting organic pollution degradation, nitrogen and phosphorus removal in the sewage, wherein the biological filler adopts hollow spherical filler, and removes pollutants, pathogenic bacteria and part of ammonia and phosphorus in the sewage by using anaerobic microorganisms attached to the inner and outer surfaces of the hollow spherical filler;
step seven: culturing water hyacinth: culturing water hyacinth in the sewage purification corridor within the range of 250 meters from the latter half section to the water outlet and the length of 800 meters;
step eight: setting an ecological floating island: installing an ecological floating island at a water outlet section of 300 meters to strengthen the output of nitrogen and phosphorus in the water body, wherein the design installation density of the ecological floating island is 8-9% of the water surface of the river of the experimental water body model;
step nine: setting water quality monitoring points: two water quality monitoring points are arranged at the middle section and the water outlet of the sewage purification corridor;
step ten: discharging: discharging the purified water;
step eleven: and (3) detecting the quality of the discharged water: and carrying out water quality sampling detection on the discharged water.
Example 2
The application of the oxygen-enriched biomembrane technology in the experimental water body is as follows:
the experimental water body is determined, local residents of the experimental water body build densely along a river without sewage collecting pipes, most of peripheral residents belong to foreign staff and basically have no environmental awareness, domestic sewage and excrement are discharged into the river, and then the ecological restoration system structure is installed in the experimental water body model.
A method for ecologically restoring water in rivers and lakes comprises the following steps:
step one, draining and irrigating a canal: the domestic sewage is discharged in a centralized way, the river sewage and the domestic sewage are discharged to a drainage and irrigation channel, and the sewage is collected by an interception weir;
step two, setting an ecological soft enclosure: designing and installing ecological soft barricades along two banks of a river, wherein the installation position of the ecological soft barricades is 2 meters away from the bank of the river, and separating sewage from river water to form a sewage purification corridor;
step three, water outlet setting: the distance between the water outlet of the sewage purification corridor and the sewage outlet is about 50 meters;
step four, installing the oxygen-enriched biomembrane: arranging an oxygen-enriched biomembrane in the sewage purification corridor; the oxygen-enriched biomembrane comprises nanoscale polyurethane polyamide with an oxygen affinity characteristic and a composite fiber membrane, and is formed by adopting a dynamic natural culture biofilm formation by combining a low-flux oxygen enrichment technology; so that species with higher affinity and stronger degradation to pollutants in water form dominant strains on the oxygen-enriched biomembrane; in the example, the oxygen-enriched biomembrane comprises 45-50% of nano polyurethane polyamide, 4-9% of composite fiber membrane, 3-4% of magnetic nano fe3o4 particles and 6-8% of strong hydrophilic master batch.
Step five, installing a low-flux oxygen-enriched hose: the aeration flux setting range of the low-flux oxygen-enriched hose is 0.2-0.7 (m.h), the low-flux oxygen-enriched hose is installed at the bottom end of a river channel, the aeration flux setting range of the low-flux oxygen-enriched hose is 0.3-0.35/(m.h) through adjusting the aperture ratio of the low-flux oxygen-enriched hose, bottom sediment stirring caused by bubbles is reduced to the minimum, oxygen is transmitted to the surface layer of the bottom sediment and the overlying water body under the condition of micro stirring, the low-flux reoxygenation hose releases oxygen to the overlying water body and the oxygen-enriched biomembrane group, the speed of absorbing, degrading and converting pollutants in water by the biomembrane is increased, and the biological layer attached to the surface is promoted to be updated;
step six, biochemical treatment environment forming: putting biological filler in the sewage purification corridor, forming alternate aerobic and anaerobic biochemical treatment environment for the isolated sewage along the sewage flow direction, promoting organic pollution degradation, nitrogen and phosphorus removal in the sewage, wherein the biological filler adopts hollow spherical filler, and removes pollutants, pathogenic bacteria and part of ammonia and phosphorus in the sewage by using anaerobic microorganisms attached to the inner and outer surfaces of the hollow spherical filler;
step seven: culturing water hyacinth: culturing water hyacinth in the sewage purification corridor within the range of 250 meters from the latter half section to the water outlet and the length of 800 meters;
step eight: setting an ecological floating island: installing an ecological floating island at a water outlet section of 300 meters to strengthen the output of nitrogen and phosphorus in a water body, wherein the design installation density of the ecological floating island is 8-9% of the water surface of the river channel;
step nine: setting water quality monitoring points: two water quality monitoring points are arranged at the middle section and the water outlet of the sewage purification corridor;
step ten: discharging: discharging the purified water;
step eleven: and (3) detecting the quality of the discharged water: and carrying out water quality sampling detection on the discharged water.
Example 3
The application of the oxygen-free biological membrane in an experimental model comprises the following steps:
the method comprises the steps of establishing an experimental water body model, wherein the experimental water body model is established by referring to a polluted river outflow water body, local residents build densely houses along a river, no sewage collecting pipe is arranged, most of peripheral residents belong to external workers, environmental protection awareness is basically avoided, domestic sewage and excrement are directly discharged into the river, and then the ecological restoration system structure is installed in the experimental water body model.
A method for ecologically restoring water in rivers and lakes comprises the following steps:
step one, draining and irrigating a canal: the domestic sewage is discharged in a centralized way, the river sewage and the domestic sewage are discharged to a drainage and irrigation channel, and the sewage is collected by an interception weir;
step two, setting an ecological soft enclosure: designing and installing ecological soft barriers along two banks of a river, wherein the installation position of the ecological soft barriers is 2 meters away from the experimental water model river bank, and separating sewage from the experimental water model river water to form a sewage purification corridor;
step three, water outlet setting: the distance between the water outlet of the sewage purification corridor and the sewage outlet is about 50 meters;
step four, molding in a biochemical treatment environment: putting biological filler in the sewage purification corridor, forming alternate aerobic and anaerobic biochemical treatment environment for the isolated sewage along the sewage flow direction, promoting organic pollution degradation, nitrogen and phosphorus removal in the sewage, wherein the biological filler adopts hollow spherical filler, and removes pollutants, pathogenic bacteria and part of ammonia and phosphorus in the sewage by using anaerobic microorganisms attached to the inner and outer surfaces of the hollow spherical filler;
step five: culturing water hyacinth: culturing water hyacinth in the sewage purification corridor within the range of 250 meters from the latter half section to the water outlet and the length of 800 meters;
step six: setting an ecological floating island: installing an ecological floating island at a water outlet section of 300 meters to strengthen the output of nitrogen and phosphorus in the water body, wherein the design installation density of the ecological floating island is 8-9% of the water surface of the river of the experimental water body model;
step seven: setting water quality monitoring points: two water quality monitoring points are arranged at the middle section and the water outlet of the sewage purification corridor;
step eight: discharging: discharging the purified water;
step nine: and (3) detecting the quality of the discharged water: and carrying out water quality sampling detection on the discharged water.
Example 4
The application of the oxygen-free biomembrane technology in the experimental water body is as follows:
the experimental water body is determined, local residents of the experimental water body build densely along a river without sewage collecting pipes, most of peripheral residents belong to foreign staff and basically have no environmental awareness, domestic sewage and excrement are discharged into the river, and then the ecological restoration system structure is installed in the experimental water body model.
A method for ecologically restoring water in rivers and lakes comprises the following steps:
step one, draining and irrigating a canal: the domestic sewage is discharged in a centralized way, the river sewage and the domestic sewage are discharged to a drainage and irrigation channel, and the sewage is collected by an interception weir;
step two, setting an ecological soft enclosure: designing and installing ecological soft barriers along two banks of a river, wherein the installation position of the ecological soft barriers is 2 meters away from the experimental water model river bank, and separating sewage from the experimental water model river water to form a sewage purification corridor;
step three, water outlet setting: the distance between the water outlet of the sewage purification corridor and the sewage outlet is about 50 meters;
step four, molding in a biochemical treatment environment: putting biological filler in the sewage purification corridor, forming alternate aerobic and anaerobic biochemical treatment environment for the isolated sewage along the sewage flow direction, promoting organic pollution degradation, nitrogen and phosphorus removal in the sewage, wherein the biological filler adopts hollow spherical filler, and removes pollutants, pathogenic bacteria and part of ammonia and phosphorus in the sewage by using anaerobic microorganisms attached to the inner and outer surfaces of the hollow spherical filler;
step five: culturing water hyacinth: culturing water hyacinth in the sewage purification corridor within the range of 250 meters from the latter half section to the water outlet and the length of 800 meters;
step six: setting an ecological floating island: installing an ecological floating island at a water outlet section of 300 meters to strengthen the output of nitrogen and phosphorus in the water body, wherein the design installation density of the ecological floating island is 8-9% of the water surface of the river of the experimental water body model;
step seven: setting water quality monitoring points: two water quality monitoring points are arranged at the middle section and the water outlet of the sewage purification corridor;
step eight: discharging: discharging the purified water;
step nine: and (3) detecting the quality of the discharged water: and carrying out water quality sampling detection on the discharged water.
Comparing examples 1-4, the analysis leads to the following conclusions:
restoring and repairing the damaged water body and other natural environments in the traditional extensive urban construction mode by using an ecological means, maintaining a certain proportion of ecological space, fundamentally eliminating external and internal factors causing black and odorous riverways by the restored water body, having the capacity of resisting pollution impact and restoring the self-cleaning capacity of the main water body;
the oxygen-enriched biomembrane technology has good operation in the sewage-receiving black and odorous water body, has obvious water quality improvement effect, indicates a technical direction for eliminating the black and odorous water body of the sewage-receiving black and odorous water body which can not be intercepted by China, and provides a complete and mature solution.
Oxygen can be oxygenated to the water body by adopting an oxygen-enriched biomembrane technology, so that the oxygen enrichment process of the water body is accelerated, and the activity of aerobic microorganisms in the water body is improved, thereby improving the water quality. According to the requirement of improving the water quality of the water body needing aeration.
The oxygen-enriched biomembrane firstly adsorbs pollutants such as organic matters, ammonia nitrogen and the like in raw water, and then is further removed by the decomposition, absorption and metabolism of microorganisms on the membrane. The outer surface layer of the oxygen-enriched biomembrane mainly consists of zoogloea bacteria, the surface of the zoogloea is surrounded by a mucilaginous layer taking polysaccharides such as poly beta-hydroxybutyric acid and the like as main bodies, the surface tension is low, and the adsorption capacity is strong. In the adsorption process of the oxygen-enriched biomembrane, the physical adsorption generated by intermolecular force, the chemical adsorption generated by the chemical attraction of ammonia nitrogen and organic matters and the biological adsorption generated by the substances on the surfaces of zooglea exist.
In order to improve the decontamination effect of raw water, it is necessary to supply sufficient oxygen and increase the concentration of oxygen so that dissolved oxygen is diffused into the inner layer of the membrane as much as possible. When the dissolved oxygen in water is sufficient, the oxygen-enriched biomembrane is in a complete aerobic state, and under the normal condition, the nitration reaction is not inhibited by high dissolved oxygen concentration, and the low dissolved oxygen concentration has obvious inhibiting effect.
The oxygen-enriched biomembrane consists of a nano-scale polyurethane polyamide composite fiber membrane with the characteristic of oxygen affinity and a low-flux oxygen enrichment technology. Can promote the sedimentation, adsorption and degradation of SS and organic pollution in the overlying water body, remove ammonia nitrogen, improve transparency, promote the mineralization of bottom mud, improve the habitat conditions of the water body and gradually eliminate the black and odorous water body. After the black and odorous water is eliminated, the EO oxygen-enriched biomembrane can also improve the biological diversity of the water, keep the ecological balance of the water and inhibit excessive breeding of algae. Is beneficial to the microorganism load proliferation, provides the places for the breeding, egg taking, growth and inhabitation, bait application and shelter for fishes and shrimps, and creates the ecological environment with a complete food chain for the fishes and the shrimps.
Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.
Claims (7)
1. A method for ecologically restoring water in rivers and lakes is characterized by comprising the following steps:
step one, draining and irrigating a canal: the domestic sewage is discharged in a centralized way, the sewage and the domestic sewage are discharged to a drainage and irrigation channel, and the sewage is collected by an interception weir;
step two, setting an ecological soft enclosure: ecological soft barriers are installed along two banks of a river, so that sewage is isolated from river water to form a sewage purification corridor;
step three, water outlet setting: the distance between the water outlet of the sewage purification corridor and the sewage outlet is about 50 meters;
step four, installing the oxygen-enriched biomembrane: arranging an oxygen-enriched biomembrane in the sewage purification corridor; the oxygen-enriched biomembrane comprises nanoscale polyurethane polyamide with an oxygen affinity characteristic and a composite fiber membrane, and is formed by adopting a dynamic natural culture biofilm formation by combining a low-flux oxygen enrichment technology; so that species with higher affinity and stronger degradation to pollutants in water form dominant strains on the oxygen-enriched biomembrane;
step five, installing a low-flux oxygen-enriched hose: the oxygen-enriched biomembrane is attached to the low-flux oxygen-enriched hose; the low-flux oxygen-enriched hose is arranged at the bottom end of the river channel, the ventilation quantity is controlled to be 0.3-0.35/(m.h) by adjusting the aperture ratio of the low-flux oxygen-enriched hose, the bottom mud stirring caused by bubbles is reduced to the minimum, and oxygen is transmitted to the surface layer of the bottom mud and the overlying water body under the condition of micro-stirring;
step six, biochemical treatment environment forming: biological filler is put into the sewage purification corridor, and isolated sewage forms an alternate aerobic and anaerobic biochemical treatment environment along the sewage flow direction, so that organic pollution degradation, nitrogen and phosphorus removal in the sewage are promoted; the biological filler adopts a hollow spherical filler, and removes organic pollutants, pathogenic bacteria and part of ammonia and phosphorus in the sewage by using anaerobic microorganisms attached to the inner surface and the outer surface of the hollow spherical filler;
step seven: culturing water hyacinth: culturing water hyacinth in the sewage purification corridor within the range of 250 meters from the latter half section to the water outlet and the length of 800 meters;
step eight: setting an ecological floating island: an ecological floating island is arranged at a water outlet section of 300 meters, so that the output of nitrogen and phosphorus in the water body is enhanced;
step nine: setting water quality monitoring points: arranging a water quality monitoring point on the sewage purification corridor;
step ten: discharging: discharging the purified water;
step eleven: and (3) detecting the quality of the discharged water: and carrying out water quality sampling detection on the discharged water.
2. The method for ecologically restoring water in rivers and lakes according to claim 1, wherein the aeration flux of the low-flux oxygen-enriched hose is set within the range of 0.2-0.7 (m.h).
3. The method for ecologically restoring water in rivers and lakes according to claim 1, wherein the oxygen-enriched biomembrane comprises 45-50% of nano-grade polyurethane polyamide, 4-9% of composite fiber membrane, 3-4% of magnetic nano fe3o4 particles and 6-8% of strong hydrophilic master batch.
4. The method for ecologically restoring water in rivers and lakes according to claim 1, wherein the installation position of the ecological soft barricade is 2 meters away from the river bank.
5. The method for ecologically restoring water in rivers and lakes according to claim 1, wherein the low-flux reoxygenation hose releases oxygen to the overlying water body and the oxygen-enriched biomembrane group, so as to increase the speed of the biomembrane for absorbing, degrading and converting pollutants in the water and promote the regeneration of the biomembrane attached to the surface.
6. The method for ecologically restoring water in rivers and lakes according to claim 1, wherein the ecological floating island is designed and installed at a density of 8-9% of the surface of the river.
7. The method for ecologically restoring water in rivers and lakes according to claim 1, wherein two water quality monitoring points are arranged at the middle section and the water outlet of the sewage purification corridor.
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| CN106186343A (en) * | 2016-08-26 | 2016-12-07 | 广州市戴斌生态环境科技有限公司 | A kind of comprehensive processing method to urban river |
| CN209635983U (en) * | 2019-02-19 | 2019-11-15 | 北京汇恒环保工程股份有限公司 | A kind of system that soft enclosure combination restoration of the ecosystem is administered in situ for black and odorous water |
| CN110591205A (en) * | 2019-09-29 | 2019-12-20 | 北交源生态环境科技(北京)有限公司 | Composite polymer material with oxygen enrichment function |
| CN110642370A (en) * | 2019-09-29 | 2020-01-03 | 北交源生态环境科技(北京)有限公司 | Biomembrane filler with oxygen enrichment function |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106186343A (en) * | 2016-08-26 | 2016-12-07 | 广州市戴斌生态环境科技有限公司 | A kind of comprehensive processing method to urban river |
| CN209635983U (en) * | 2019-02-19 | 2019-11-15 | 北京汇恒环保工程股份有限公司 | A kind of system that soft enclosure combination restoration of the ecosystem is administered in situ for black and odorous water |
| CN110591205A (en) * | 2019-09-29 | 2019-12-20 | 北交源生态环境科技(北京)有限公司 | Composite polymer material with oxygen enrichment function |
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