WO2023098663A1 - Modificateur de sédiments par paliers pour restauration écologique de rivières et de lacs profonds - Google Patents

Modificateur de sédiments par paliers pour restauration écologique de rivières et de lacs profonds Download PDF

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Publication number
WO2023098663A1
WO2023098663A1 PCT/CN2022/135042 CN2022135042W WO2023098663A1 WO 2023098663 A1 WO2023098663 A1 WO 2023098663A1 CN 2022135042 W CN2022135042 W CN 2022135042W WO 2023098663 A1 WO2023098663 A1 WO 2023098663A1
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WO
WIPO (PCT)
Prior art keywords
layer
flocculation
water
oxygenation
sediment
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PCT/CN2022/135042
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English (en)
Chinese (zh)
Inventor
黄佳音
钱泽朋
胡保安
董先锋
刘璟
Original Assignee
中交（天津）生态环保设计研究院有限公司
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Priority to AU2022400828A priority Critical patent/AU2022400828A1/en
Publication of WO2023098663A1 publication Critical patent/WO2023098663A1/fr

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Classifications

    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C02F1/56—Macromolecular compounds
    • 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
    • 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
    • C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F7/00—Aeration of stretches of water
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/722—Oxidation by peroxides
    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00—Use of specific compounds during water treatment
    • C02F2305/06—Nutrients for stimulating the growth of microorganisms
    • 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
    • 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
    • Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing

Definitions

  • the invention relates to the fields of ecological restoration of river and lake bottoms and water quality purification of rivers and lakes, in particular to a stepped bottom quality modifier for ecological restoration of deep-water rivers and lakes.
  • an object of the present invention is to provide a step-type substrate improvement agent for ecological restoration of deep-water rivers and lakes, which has a high utilization rate and can fully utilize each component in the process of each stage of sediment restoration. It can reduce the use of sediment restoration agent, effectively reduce the investment of sediment ecological restoration projects, and reduce the risk of secondary pollution in the process of ecological restoration.
  • Another object of the present invention is to provide a preparation method of the above-mentioned step-type substrate modifier.
  • a step-type substrate improvement agent for ecological restoration of deep-water rivers and lakes which consists of a flocculation layer, an oxidation layer, a nutrient layer, and an oxygenation layer arranged in sequence, wherein: the flocculation layer is composed of polyacrylamide, polyaluminum chloride , disodium edetate and polyvinylpyrrolidone are uniformly mixed according to the mass ratio of 1:1:(1 ⁇ 2):1 and then pre-pressed into tablets; the oxide layer is made of citric acid, humic acid, compounded Potassium hydrogen sulfate (potassium hydrogen persulfate compound salt (potassium monopersulfate, potassium monopersulfate)) in parts by mass (1 ⁇ 2): (1 ⁇ 2): (2 ⁇ 4) after uniform mixing
  • the flocculation layer is pre-pressed on the basis of the flocculation layer;
  • the nutrient layer is composed of calcium-based bentonite, magnesium chloride, calcium chloride, anhydrous sodium sulfate,
  • the mass percent of the flocculated layer, the oxidized layer, the nutrient layer, and the oxygenated layer consists of:
  • the mass percentages of the above-mentioned flocculation layer, oxidation layer, nutrient layer, and oxygenation layer are composed of:
  • the alkali-activated modified mineral powder is washed with water for 3 to 4 times, and then dried at 105°C.
  • the total thickness of the flocculation layer and the oxygenation layer is no more than 0.2cm
  • the total thickness of the flocculation layer and the oxygenation layer is proportional to the water depth
  • the total thickness of the oxidation layer and the nutrient layer is proportional to the bottom mud pollution. Proportional to the serious situation.
  • the overall length of the substrate improving agent is 5cm-11cm, the width is 5cm-11cm, and the thickness is 0.3cm-0.8cm.
  • the oxidation layer must be between the flocculation layer and the nutrient layer, and the nutrient layer must be between the oxidation layer and the oxygenation layer.
  • the present invention divides the product into four layers according to the process of water ecological restoration, and each layer plays a different main role.
  • the flocculation layer and the oxygenation layer mainly play a role, which can effectively flocculate suspended colloids and other substances in the water and finally sink to the bottom of rivers and lakes.
  • the porous biopolymer in the aerobic layer will leave beneficial microorganisms, which not only strengthens the self-purification ability of the water environment, but also ensures the continuity of the self-repair of the water environment.
  • each layer can keep stable when dry, will not self-react, and will quickly act on harmful substances in water after encountering water, and there is a certain synergistic effect between each substance, and the specific effects are as follows:
  • the flocculation layer and the oxygenation layer mainly play the roles of flocculation, complexation, oxygenation and stabilization respectively.
  • the polyaluminum chloride, polyacrylamide and porous biopolymers have chemical and biological flocculation effects, and can remove part of suspended solids and colloids in the water environment during the descent in deep-water rivers and lakes. There is no porous biopolymers in the floc layer It is to prevent the oxidizing substances of the oxide layer from damaging some biological structures.
  • Polyvinylpyrrolidone has anti-oxidation synergistic and stabilizing effects.
  • Disodium ethylenediaminetetraacetic acid (EDTA) in the floc layer is an antioxidant and complexing agent, which can complex the heavy metal ions in the water environment during the descent in the deep water of rivers and lakes.
  • EDTA ethylenediaminetetraacetic acid
  • Sodium percarbonate and percarbonamide in the oxygenation layer play the role of rapid release and slow release of oxygen respectively, ensuring the instantaneous and continuous oxygen under water.
  • the oxide layer mainly plays the role of disinfection, removal of macromolecular organic matter and transformation of other substances. Under the action of citric acid and humic acid, it can effectively remove harmful microorganisms in the sediment and reduce the harm of virus bacteria. Under the action of compound potassium hydrogen persulfate, the oxidation-reduction potential of the mud-water interface can be increased, and the purpose of eliminating harmful bacteria can be achieved by destroying the permeability of microbial cells in the bottom mud; the ferrous iron and aluminum in the water can be eliminated through oxidation.
  • Atoms are oxidized to trivalent, which promotes flocculation, improves water transparency and reduces the diffusion of heavy metal ions in sediment; it can oxidize nitrite in sediment to nitrate, hydrogen sulfide to sulfate, and remove toxic and refractory organic pollution Algae poisons such as liver toxins and other algae poisons produced by degrading and degrading the death of deposited algae.
  • the nutrient layer is mainly used to provide nutrients and nutrients needed by plants and microorganisms.
  • the alkali-activated modified mineral powder and diatomite can also reduce heavy metal ions in water and sediment under the action of ion exchange and adsorption.
  • the present invention has the following beneficial effects:
  • the present invention combines porous biopolymers and other effective chemical substances through layering, and realizes that the same sediment restoration agent has both biological and chemical effects, which can ensure effective treatment of the current environment under the action of chemical reagents. It has a fast and good effect, and can also maintain a continuous effect under the action of microorganisms, while strengthening the self-purification ability of the water environment and sediment.
  • the present invention designs a hierarchical structure for the succession of different stages of ecological restoration, which ensures the maximum utilization rate of the corresponding effective substances at different stages and different timeliness, and will not cause excessive dosage and cause
  • the problem of secondary pollution has effectively reduced the investment in ecological restoration projects, and the amount of injection under the same effect is about 1/2 of similar products in the market.
  • the present invention has guaranteed that this product has certain stability under normal temperature, dry condition by adding multiple stabilizing substances, and the shelf life time is 3.5 years longer, 2 years longer than the shelf life of similar products in the market.
  • the porous biopolymer used in the present invention is a high-efficiency water purification product composed of various natural mineral powders, special compound microorganisms extracted from nature and their metabolites.
  • the product is composed of various minerals, molds, yeasts, A variety of microorganisms such as actinomycetes are composed according to a specific formula.
  • the preparation method of porous biopolymer is recorded in the Chinese invention patent whose publication number is CN111018282A and the name of the invention is "a kind of porous biopolymer for river and lake ecological dredging and sediment dehydration", and its content is included in the present invention, wherein the implementation
  • the porous biopolymer agent used in Example 1 and Example 2 is the porous biopolymer agent prepared in Example 1 of the invention patent.
  • the polyaluminum chloride used in the present invention is a solid, commercially available product, and the mass fraction of aluminum chloride can be 26%, 28%, or 30%.
  • the calcium-based bentonite used in the present invention is a commercially available product, and its interlayer cation is Ca 2+ .
  • the alkali-excited modified mineral powder used in the present invention is a commercially available product, which is modified by the principle of alkali excitation.
  • the container is 1m long, 1m wide, and 1.5m high.
  • the test materials are water and sediment from Qilu Lake in Tonghai County, Yunnan province, and the seeds of bitter grass with strong adaptability.
  • the container is placed outdoors to ensure natural conditions, and then the black and smelly bottom mud is spread all over the bottom of the container and the seeds of bitter grass are added at fixed points.
  • the total thickness of the bottom mud is 0.2m, and the total water depth is 0.8m (not including the bottom mud).
  • Three fixed-point monitoring instruments for dissolved oxygen are distributed in a triangle in the middle of the water environment.
  • Quantitative samples are taken out according to the composition of flocculation layer, oxidation layer, nutrient layer and oxygenation layer according to the mass percentage of 15%, 20%, 50%, 15%,
  • the improved agent after forming is 7cm long and 7cm wide.
  • the layer thicknesses are about 0.1 cm, 0.15 cm, 0.2 cm, 0.1 cm respectively, and the total thickness is about 0.55 cm.
  • the time required for the overall water environment to be clear and transparent is 6 days, and the water environment can continue to remain clear within 5 days after that; according to the dissolved oxygen detector display , the dissolved oxygen is also slowly increasing; the sediment modifier settles to the bottom of the container and fully contacts with the sediment, the digestion of the sediment modifier and the sediment improvement process are carried out at the same time, through the slow release and the action of the biopolymerization agent, the sediment is in 7 The situation that turns yellow gradually occurs after 8 days, and bitter grass seed begins to germinate and grows in 8 days.
  • the container is 1m long, 1m wide, and 1.5m high.
  • the test materials are water and sediment from Qilu Lake in Tonghai County, Yunnan province, and the seeds of bitter grass with strong adaptability. Place the container outdoors to ensure natural conditions, then cover the bottom of the container with black odorous bottom mud and add bitter grass seeds at fixed points, the total thickness is 0.2m, and the total water depth is 1.2m.
  • Three fixed-point monitoring instruments for dissolved oxygen are distributed in a triangle in the middle of the water environment.
  • the alkali-activated mineral powder in the nutrient layer is washed with water for 3 to 4 times and dried at 105°C for pretreatment, and then the components of each layer are prepared according to the following mass-to-number ratios, and mixed uniformly:
  • the flocculation layer, the oxidation layer, the nutrient layer and the oxygenation layer are composed according to the mass percentages of 20%, 28%, 28%, and 22%, and quantitative samples are taken out.
  • the forming modifier is 10 cm long and 10 cm wide.
  • the thickness is about 0.11cm, 0.17cm, 0.18cm, 0.13cm respectively, and the total thickness is about 0.59cm.
  • the container is 1m long, 1m wide, and 1.5m high.
  • the test materials are water and sediment from Qilu Lake in Tonghai County, Yunnan province, and the seeds of bitter grass with strong adaptability. Place the container outdoors to ensure natural conditions, then cover the bottom of the container with black odorous bottom mud and add bitter grass seeds at fixed points, the total thickness is 0.2m, and the total water depth is 0.8m.
  • Three fixed-point monitoring instruments for dissolved oxygen are distributed in a triangle in the middle of the water environment.
  • this embodiment does not add any sediment improver, and restores under natural ecological conditions.
  • this embodiment starts from the arrangement of the necessary conditions, under the self-generation of beneficial microorganisms and the action of gravity settlement, some floating substances in the water environment are partially digested and most of them sink.
  • the time required for the overall water environment to be clear and transparent is 15 days, but after 15 days, the water environment There are still small particles floating in the soil; due to the full incorporation of dissolved oxygen in the air, the sediment environment is gradually improved and loosened, some harmful substances in the sediment are released, and beneficial microorganisms are gradually activated with more types.
  • the container is 1m long, 1m wide, and 1.5m high.
  • the test materials are water and sediment from Qilu Lake in Tonghai County, Yunnan province, and the seeds of bitter grass with strong adaptability. Place the container outdoors to ensure natural conditions, then cover the bottom of the container with black odorous bottom mud and add bitter grass seeds at fixed points, the total thickness is 0.2m, and the total water depth is 0.8m.
  • Three fixed-point monitoring instruments for dissolved oxygen are distributed in a triangle in the middle of the water environment.

Abstract

La présente invention concerne un modificateur de sédiments par paliers pour la restauration écologique des rivières et des lacs profonds. Le modificateur est composé d'une couche de floculation, d'une couche d'oxydation, d'une couche de nutrition et d'une couche d'oxygénation. La couche de floculation est formée par le mélange uniforme et proportionnel de polyacrylamide, de chlorure de polyaluminium, d'éthylènediaminetétraacétate de disodium et de polyvinylpyrrolidone, puis par la compression préalable du mélange. La couche d'oxydation est formée par le mélange uniforme et proportionnel d'acide citrique, d'acide humique et de persulfate d'hydrogène de potassium composite, puis par le tamisage préalable du mélange sur la base de la couche de floculation. La couche de nutrition est formée par le mélange uniforme et proportionnel de bentonite calcique, de chlorure de magnésium, de chlorure de calcium, de sulfate de sodium anhydre, d'une poudre minérale modifiée activée par un alcali et de diatomite, puis par le tamisage préalable du mélange sur la base de la couche de floculation et de la couche d'oxydation. La couche d'oxygénation est formée par le mélange uniforme et proportionnel d'un agent de polymérisation biologique poreux, de percarbonate de sodium, de peroxyde d'urée et de polyvinylpyrrolidone, puis par la compression du mélange sur la base de la couche de floculation, de la couche d'oxydation et de la couche de nutrition. Les effets du modificateur sont à la fois biologiques et chimiques, aucune pollution secondaire n'en résulte et le coût de l'investissement est faible.
PCT/CN2022/135042 2021-12-01 2022-11-29 Modificateur de sédiments par paliers pour restauration écologique de rivières et de lacs profonds WO2023098663A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2022400828A AU2022400828A1 (en) 2021-12-01 2022-11-29 Stepped sediment modifier for ecological restoration of deepwater rivers and lakes

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202111450428.2 2021-12-01
CN202111450428.2A CN113845284B (zh) 2021-12-01 2021-12-01 用于深水河湖生态修复的阶梯式底质改良剂

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CN (1) CN113845284B (fr)
AU (1) AU2022400828A1 (fr)
LU (1) LU504481B1 (fr)
WO (1) WO2023098663A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113845284B (zh) * 2021-12-01 2022-02-18 中交（天津）生态环保设计研究院有限公司 用于深水河湖生态修复的阶梯式底质改良剂

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CN112592013A (zh) * 2020-11-25 2021-04-02 武汉理工大学 黑臭河污泥底改剂及其制备、使用方法
CN113845284A (zh) * 2021-12-01 2021-12-28 中交（天津）生态环保设计研究院有限公司 用于深水河湖生态修复的阶梯式底质改良剂

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Publication number Priority date Publication date Assignee Title
JP2000197899A (ja) * 1999-01-07 2000-07-18 Kankyo Biken:Kk 湖沼等の浄化処理剤及び浄化処理方法
CN108726666A (zh) * 2018-06-04 2018-11-02 中国科学院水生生物研究所 一种黑臭水体修复剂及制备方法和应用
CN111018282A (zh) * 2019-12-12 2020-04-17 中交（天津）生态环保设计研究院有限公司 一种河湖生态清淤底泥脱水用多孔生物聚合剂
CN111170400A (zh) * 2020-01-16 2020-05-19 深圳市深港产学研环保工程技术股份有限公司 水质底质改良剂及其制备方法和水质底质的改良方法
CN112592013A (zh) * 2020-11-25 2021-04-02 武汉理工大学 黑臭河污泥底改剂及其制备、使用方法
CN113845284A (zh) * 2021-12-01 2021-12-28 中交（天津）生态环保设计研究院有限公司 用于深水河湖生态修复的阶梯式底质改良剂

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AU2022400828A1 (en) 2023-12-21
CN113845284B (zh) 2022-02-18
CN113845284A (zh) 2021-12-28

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