CN112777900A - Method for removing black and odorous water body sediment pollutants - Google Patents
Method for removing black and odorous water body sediment pollutants Download PDFInfo
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/004—Sludge detoxification
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/06—Treatment of sludge; Devices therefor by oxidation
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
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- 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
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- 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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
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- E02B3/023—Removing sediments
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- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention discloses a method for removing black and odorous water body sediment pollutants, which comprises the following steps: the method comprises the following steps of separating black and odorous water from sludge bottom pollutants, stripping bottom sludge, airing bottom sludge, tedding bottom sludge, covering bottom sludge, storing water in lakes, putting chemical agents, treating black and odorous water and backfilling lakes. The invention can effectively and thoroughly remove the sludge bottom pollutants, has very good removal effect, belongs to long-term treatment, does not cause secondary pollution of water, and has better treatment effect.
Description
Technical Field
The invention relates to the field of treatment of black and odorous water, in particular to a method for removing sludge bottom pollutants from black and odorous water.
Background
With the rapid development of social economy and the acceleration of urbanization process in China, the scale and population of cities and towns are continuously increased, the discharge amount of sewage produced and living by human beings is increasingly increased, and the concentration of pollutants entering a water body exceeds the self-purification capacity of the water body. Aerobic microorganisms consume oxygen in the water body through metabolism, so that the water body is in an anoxic or anaerobic state, and the anaerobic microorganisms which propagate in large quantity and organic matters are subjected to reactions such as putrefaction, decomposition, fermentation and the like to generate 14000 kinds of odoriferous gases such as organic sulfide, ammonia nitrogen, methane and the like; meanwhile, heavy metals such as iron, manganese and the like in the water body are reduced and combined with sulfur ions to form FeS, MnS and other black precipitates so as to blacken the water body. In addition, the urban water body has poor fluidity and insufficient hydrodynamic force, so that the water environment is deteriorated, pollutants are accumulated, and the black and odorous condition of the water body is aggravated. The existence of the black and odorous river water not only brings bad sensory stimulation to people, but also directly poses serious threats to the drinking water and water safety of people.
The sludge bottom pollutant is the sediment of rivers and lakes and is an important component of natural water areas. When the water area is polluted, part of pollutants in the water can be stored in the mud bottom through precipitation or particle adsorption, and are released again under proper conditions to become a secondary pollution source, and the pollution is called bottom mud pollution.
The existing method for removing the black and odorous water body sediment pollutants is single, only by excavating and renovating sediment and removing and treating the pollutants in the sediment by using some microorganisms or chemical agents, the method is large in workload, belongs to short-term treatment, is easy to cause water body pollution repetition, is not good in treatment effect, and is not beneficial to practical use.
Disclosure of Invention
The invention aims to provide a method for removing black and odorous water body bottom sludge pollutants, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for removing black and odorous water body bottom sludge pollutants comprises the following steps:
the method comprises the following steps: separating the black and odorous water body from the sludge bottom pollutants, putting a water pump into a lake with the black and odorous water body, draining the lake, pumping out the black and odorous water body, and placing the black and odorous water body after being pumped out in an isolated manner;
step two: stripping the bottom mud, draining the lake of the black and odorous water body to expose the bottom mud, enabling mud bottom pollutants to exist in the bottom mud, excavating and stripping the upper layer of the bottom mud mechanically or manually, and placing the upper layer of the bottom mud subjected to excavating and stripping in an isolated manner and performing centralized treatment;
step three: drying the bottom mud, namely directly exposing the bottom mud with the upper layer peeled off to the sunlight for direct natural drying for 10-15 days until the upper layer of the bottom mud has a drying crack;
step four: tedding the bottom mud, mechanically or manually renovating the dried bottom mud by the aired bottom mud, and naturally tedding the dried bottom mud by exposing the dried bottom mud to sunlight again for 30-50 days to complete the complete dehydration of the bottom mud;
step five: covering the bottom mud, namely covering the upper layer of the tedded bottom mud to further protect the bottom mud;
secondly, aerating the covered bottom mud to promote the material exchange between gas and liquid, and further treating the bottom mud to degrade pollutants in the bottom mud;
step six: storing water in the lake, primarily storing the covered bottom mud in a fixed amount of clean pollution-free water, wherein the height of the water is 30-50 cm;
step seven: putting chemical agents in a water body, wherein the put chemical agents and pollutants in the bottom mud are subjected to oxidation, reduction, precipitation and hydrolysis reaction, so that the content of the pollutants in the bottom mud is reduced, and the pollutants are converted into a low-toxicity or non-toxic state; the chemical agents comprise aluminum salt, ferric salt and quicklime, and after the aluminum salt, the ferric salt and the quicklime are thrown into the water body, three metal ions, namely aluminum ions, iron ions and calcium ions react with phosphorus in the bottom mud to form precipitates through forming an active layer on the surface of the bottom mud, so that the content of the phosphorus diffused to the water body is reduced or even inhibited;
step eight: treating the black and odorous water body and backfilling the lake, performing water body restoration on the black and odorous water body extracted in the step one,
the water body restoration adopts microorganism restoration, the microorganism is probiotics, the probiotics can adsorb, decompose and convert the black and odorous water body, and rotten substances are eliminated to achieve the deodorization effect, and no secondary pollution is caused to the environment; and backfilling the restored water body into the original lake, backfilling the lake to the original water level, putting fishes and planting vegetation in the water body, and removing the sludge bottom pollutants of the black and odorous water body.
As a further scheme of the invention: the sunning of bed mud and the tedding of bed mud can improve the oxidability of bed mud, the organic matter in the oxidation bed mud, reduce aerobic factor to turn into the nitrate with ammonia nitrogen, reduction state sulphur is changed into the sulphate, releases the calcium in the bed mud, has fabulous effect to soil oxidation remediation.
As a further scheme of the invention: the depth of the drying crack on the upper layer of the bottom mud is 5-10cm, and the tedding depth of the bottom mud is 30-50 cm.
As a further scheme of the invention: the covering material includes natural materials and modified ores, and the natural materials include fine sand, laterite and quartz sand.
As a further scheme of the invention: the microorganism remediation is to convert the sludge bottom pollutants into nontoxic stable substances under the action of microorganism metabolism, so that the sludge bottom pollution state of the clown water body is improved, and the microorganism remediation plays a major role in the sludge bottom pollution bioremediation.
As a further scheme of the invention: the microorganism reduces pollutants in the water body through metabolism, degrades organic pollutants in the bottom mud, rebuilds a seriously damaged bottom end biological chain, accelerates the mineralization process of the bottom mud, decomposes, converts and transfers the bottom mud, reduces the content of organic matters in the bottom mud, and reduces the volume and the thickness of the bottom mud.
As a further scheme of the invention: the aeration treatment aims to dissolve oxygen in the bottom sludge into water, so that the growth of aerobic microorganisms in the water is facilitated, and the water quality is improved.
As a further scheme of the invention: the vegetation is a plant restoration technology, the vegetation restoration technology comprises an aquatic vegetation restoration technology, a water culture technology and a biological floating bed technology, and the common vegetation comprises duckweed, reed and juncus.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the black and odorous water body and the sludge bottom pollutants are separated and treated, and a series of treatments such as bottom sludge stripping, bottom sludge airing, bottom sludge tedding, bottom sludge covering, chemical agent feeding and the like are carried out, so that the workload is reduced, the sludge bottom pollutants can be effectively and thoroughly removed, the removing effect is very good, and the method belongs to long-term treatment, can not cause secondary pollution of the water body, and has a better treatment effect.
2. The invention fully utilizes natural resources to remove the sludge bottom pollutants by airing and tedding the sludge, saves the cost, has better effect of removing the sludge bottom pollutants by separately treating the black and odorous water body and the sludge when removing the sludge bottom pollutants, and effectively avoids the waste of a large amount of water resources by backfilling the repaired black and odorous water body.
Drawings
Fig. 1 is a flow chart of a method for removing black and odorous water body bottom sludge pollutants.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1, a method for removing pollutants from a black and odorous water body bottom includes the following steps:
the method comprises the following steps: separating the black and odorous water body from the sludge bottom pollutants, putting a water pump into a lake with the black and odorous water body, draining the lake, pumping out the black and odorous water body, and placing the black and odorous water body after being pumped out in an isolated manner;
step two: stripping the bottom mud, draining the lake of the black and odorous water body to expose the bottom mud, enabling mud bottom pollutants to exist in the bottom mud, excavating and stripping the upper layer of the bottom mud mechanically or manually, and placing the upper layer of the bottom mud subjected to excavating and stripping in an isolated manner and performing centralized treatment;
step three: drying the bottom mud, namely directly exposing the bottom mud with the upper layer peeled off to the sunlight for direct natural drying for 10-15 days until the upper layer of the bottom mud has a drying crack;
step four: tedding the bottom mud, mechanically or manually renovating the dried bottom mud by the aired bottom mud, and naturally tedding the dried bottom mud by exposing the dried bottom mud to sunlight again for 30-50 days to complete the complete dehydration of the bottom mud;
step five: storing water in the lake, primarily storing the covered bottom mud in a fixed amount of clean pollution-free water, wherein the height of the water is 30-50 cm;
step six: putting chemical agents in a water body, wherein the put chemical agents and pollutants in the bottom mud are subjected to oxidation, reduction, precipitation and hydrolysis reaction, so that the content of the pollutants in the bottom mud is reduced, and the pollutants are converted into a low-toxicity or non-toxic state;
step seven: and (3) treatment of the black and odorous water body and lake backfilling, namely performing water body restoration on the black and odorous water body extracted in the step one, backfilling the restored water body into the original lake, backfilling the lake to the original water level, putting fishes and planting vegetation in the water body, and removing mud bottom pollutants of the black and odorous water body.
Preferably, the oxidation of the bottom mud can be improved by airing and tedding the bottom mud, organic matters in the bottom mud are oxidized, aerobic factors are reduced, ammonia nitrogen is converted into nitrate, reduced sulfur is converted into sulfate, calcium in the bottom mud is released, and the method has a good effect on soil oxidation remediation.
Preferably, the depth of the drying crack on the upper layer of the substrate sludge is 5-10cm, and the tedding depth of the substrate sludge is 30-50 cm.
Preferably, the chemical agent comprises aluminum salt, ferric salt and quicklime, and after the aluminum salt, the ferric salt and the quicklime are thrown into the water body, 3 metal ions of aluminum ions, ferric ions and calcium ions react with phosphorus in the bottom mud to form precipitates through forming an active layer on the surface of the bottom mud, so that the content of the phosphorus diffused to the water body is reduced or even inhibited.
Preferably, the water body restoration adopts microorganism restoration, the microorganisms are probiotics, the probiotics can adsorb, decompose and convert the black and odorous water body, rotten substances are eliminated to achieve the deodorization effect, and no secondary pollution is caused to the environment.
Preferably, the microorganism remediation is to convert the sludge bottom pollutants into nontoxic stable substances under the action of microorganism metabolism, so that the sludge bottom pollution state of the clown water body is improved, and the microorganism remediation plays a major role in the sludge bottom pollution bioremediation.
Preferably, the microorganisms reduce pollutants in the water body through metabolism, degrade organic pollutants in the bottom mud, rebuild seriously damaged bottom end biological chains, accelerate the mineralization process of the bottom mud, decompose, convert and transfer the bottom mud, reduce the content of organic matters in the bottom mud, and reduce the volume and thickness of the bottom mud.
Preferably, the aeration treatment is to dissolve oxygen in the bottom sludge into water, which is beneficial to the growth of aerobic microorganisms in the water, thereby improving the water quality.
Preferably, the vegetation is a phytoremediation technique, which includes aquatic vegetation restoration, hydroponic, and bio-bed techniques, and commonly used vegetation includes lemna, reed, and juncus.
Example two
Referring to fig. 1, a method for removing pollutants from a black and odorous water body bottom includes the following steps:
the method comprises the following steps: separating the black and odorous water body from the sludge bottom pollutants, putting a water pump into a lake with the black and odorous water body, draining the lake, pumping out the black and odorous water body, and placing the black and odorous water body after being pumped out in an isolated manner;
step two: stripping the bottom mud, draining the lake of the black and odorous water body to expose the bottom mud, enabling mud bottom pollutants to exist in the bottom mud, excavating and stripping the upper layer of the bottom mud mechanically or manually, and placing the upper layer of the bottom mud subjected to excavating and stripping in an isolated manner and performing centralized treatment;
step three: drying the bottom mud, namely directly exposing the bottom mud with the upper layer peeled off to the sunlight for direct natural drying for 10-15 days until the upper layer of the bottom mud has a drying crack;
step four: tedding the bottom mud, mechanically or manually renovating the dried bottom mud by the aired bottom mud, and naturally tedding the dried bottom mud by exposing the dried bottom mud to sunlight again for 30-50 days to complete the complete dehydration of the bottom mud;
step five: covering the bottom mud, namely covering the upper layer of the tedded bottom mud to further protect the bottom mud;
secondly, aerating the covered bottom mud to promote the material exchange between gas and liquid, and further treating the bottom mud to degrade pollutants in the bottom mud;
step six: storing water in the lake, primarily storing the covered bottom mud in a fixed amount of clean pollution-free water, wherein the height of the water is 30-50 cm;
step seven: putting chemical agents in a water body, wherein the put chemical agents and pollutants in the bottom mud are subjected to oxidation, reduction, precipitation and hydrolysis reaction, so that the content of the pollutants in the bottom mud is reduced, and the pollutants are converted into a low-toxicity or non-toxic state;
step eight: and (3) treatment of the black and odorous water body and lake backfilling, namely performing water body restoration on the black and odorous water body extracted in the step one, backfilling the restored water body into the original lake, backfilling the lake to the original water level, putting fishes and planting vegetation in the water body, and removing mud bottom pollutants of the black and odorous water body.
Preferably, the oxidation of the bottom mud can be improved by airing and tedding the bottom mud, organic matters in the bottom mud are oxidized, aerobic factors are reduced, ammonia nitrogen is converted into nitrate, reduced sulfur is converted into sulfate, calcium in the bottom mud is released, and the method has a good effect on soil oxidation remediation.
Preferably, the depth of the drying crack on the upper layer of the substrate sludge is 5-10cm, and the tedding depth of the substrate sludge is 30-50 cm.
Preferably, the covering material comprises natural materials and modified ores, and the natural materials include fine sand, laterites and quartz sand.
Preferably, the chemical agent comprises aluminum salt, ferric salt and quicklime, and after the aluminum salt, the ferric salt and the quicklime are thrown into the water body, 3 metal ions of aluminum ions, ferric ions and calcium ions react with phosphorus in the bottom mud to form precipitates through forming an active layer on the surface of the bottom mud, so that the content of the phosphorus diffused to the water body is reduced or even inhibited.
Preferably, the water body restoration adopts microorganism restoration, the microorganisms are probiotics, the probiotics can adsorb, decompose and convert the black and odorous water body, rotten substances are eliminated to achieve the deodorization effect, and no secondary pollution is caused to the environment.
Preferably, the microorganism remediation is to convert the sludge bottom pollutants into nontoxic stable substances under the action of microorganism metabolism, so that the sludge bottom pollution state of the clown water body is improved, and the microorganism remediation plays a major role in the sludge bottom pollution bioremediation.
Preferably, the microorganisms reduce pollutants in the water body through metabolism, degrade organic pollutants in the bottom mud, rebuild seriously damaged bottom end biological chains, accelerate the mineralization process of the bottom mud, decompose, convert and transfer the bottom mud, reduce the content of organic matters in the bottom mud, and reduce the volume and thickness of the bottom mud.
Preferably, the aeration treatment is to dissolve oxygen in the bottom sludge into water, which is beneficial to the growth of aerobic microorganisms in the water, thereby improving the water quality.
Preferably, the vegetation is a phytoremediation technique, which includes aquatic vegetation restoration, hydroponic, and bio-bed techniques, and commonly used vegetation includes lemna, reed, and juncus.
According to the invention, the black and odorous water body and the sludge pollutant are separated, and a series of treatments such as bottom sludge stripping, bottom sludge airing, bottom sludge tedding, bottom sludge covering, chemical agent feeding and the like are performed, so that the workload is reduced, the sludge pollutant can be effectively and thoroughly removed, the removal effect is very good, the method belongs to long-term treatment, secondary pollution of the water body is avoided, and the treatment effect is better.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims
The claims are to be given no more than the foregoing description, and it is intended that all matter contained in the above description shall be interpreted as including the meaning and range of equivalents of the claims
Variations are encompassed within the invention.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. A method for removing black and odorous water body sediment pollutants is characterized by comprising the following steps:
the method comprises the following steps: separating the black and odorous water body from the sludge bottom pollutants, putting a water pump into a lake with the black and odorous water body, draining the lake, pumping out the black and odorous water body, and placing the black and odorous water body after being pumped out in an isolated manner;
step two: stripping the bottom mud, draining the lake of the black and odorous water body to expose the bottom mud, enabling mud bottom pollutants to exist in the bottom mud, excavating and stripping the upper layer of the bottom mud mechanically or manually, and placing the upper layer of the bottom mud subjected to excavating and stripping in an isolated manner and performing centralized treatment;
step three: drying the bottom mud, namely directly exposing the bottom mud with the upper layer peeled off to the sunlight for direct natural drying for 10-15 days until the upper layer of the bottom mud has a drying crack;
step four: tedding the bottom mud, mechanically or manually renovating the dried bottom mud by the aired bottom mud, and naturally tedding the dried bottom mud by exposing the dried bottom mud to sunlight again for 30-50 days to complete the complete dehydration of the bottom mud;
step five: covering the bottom mud, namely covering the upper layer of the tedded bottom mud to further protect the bottom mud;
secondly, aerating the covered bottom mud to promote the material exchange between gas and liquid, and further treating the bottom mud to degrade pollutants in the bottom mud;
step six: storing water in the lake, primarily storing the covered bottom mud in a fixed amount of clean pollution-free water, wherein the height of the water is 30-50 cm;
step seven: putting chemical agents in a water body, wherein the put chemical agents and pollutants in the bottom mud are subjected to oxidation, reduction, precipitation and hydrolysis reaction, so that the content of the pollutants in the bottom mud is reduced, and the pollutants are converted into a low-toxicity or non-toxic state; the chemical agents comprise aluminum salt, ferric salt and quicklime, and after the aluminum salt, the ferric salt and the quicklime are thrown into the water body, three metal ions, namely aluminum ions, iron ions and calcium ions react with phosphorus in the bottom mud to form precipitates through forming an active layer on the surface of the bottom mud, so that the content of the phosphorus diffused to the water body is reduced or even inhibited;
step eight: treating the black and odorous water body and backfilling the lake, performing water body restoration on the black and odorous water body extracted in the step one,
the water body restoration adopts microorganism restoration, the microorganism is probiotics, the probiotics can adsorb, decompose and convert the black and odorous water body, and rotten substances are eliminated to achieve the deodorization effect, and no secondary pollution is caused to the environment; and backfilling the restored water body into the original lake, backfilling the lake to the original water level, putting fishes and planting vegetation in the water body, and removing the sludge bottom pollutants of the black and odorous water body.
2. The method for removing the sludge bottom pollutants in the black and odorous water body according to claim 1, wherein the airing of the bottom sludge and the tedding of the bottom sludge can improve the oxidizability of the bottom sludge, oxidize organic matters in the bottom sludge, reduce aerobic factors, convert ammonia nitrogen into nitrate, convert reduced sulfur into sulfate, release calcium in the bottom sludge and have an excellent effect on soil oxidation remediation.
3. The method for removing black and odorous water body sediment pollutants according to claim 1, wherein the depth of the drying cracks on the upper layer of the sediment is 5-10cm, and the tedding depth of the sediment is 30-50 cm.
4. The method of removing black and odorous water body sediment contaminants of claim 1, wherein the covering material comprises natural materials and modified ores, and the natural materials comprise fine sand, laterite and quartz sand.
5. The method for removing black and odorous water body sediment pollutants according to claim 1, wherein the microbial remediation is to convert the sediment pollutants into nontoxic stable substances under the action of microbial metabolism, so as to improve the sediment pollution state of the black and odorous water body, and the microbial remediation plays a major role in the sediment pollution bioremediation.
6. The method for removing black and odorous water body sediment pollutants according to claim 5, wherein the microorganisms metabolize the pollutants in the water body, degrade the organic pollutants in the sediment, rebuild the seriously damaged bottom end biological chains, accelerate the mineralization process of the sediment, decompose, convert and transfer the sediment, reduce the organic content in the sediment, and reduce the volume and the thickness.
7. The method for removing black and odorous water body bottom sediment pollutants according to claim 1, wherein the aeration treatment is to dissolve oxygen in the bottom sediment into water, so as to facilitate the growth of aerobic microorganisms in the water and improve the water quality.
8. The method of removing mud bottom contaminants from black and odorous water according to claim 1, wherein the vegetation is a phytoremediation technique, the phytoremediation technique includes aquatic vegetation restoration, hydroponic techniques, and bio-bed techniques, and the commonly used vegetation includes duckweed, reed, and juncus.
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| CN111661915A (en) * | 2020-06-12 | 2020-09-15 | 广州市广绿园林绿化有限公司 | Wetland ecosystem restoration method |
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