A low-carbon treatment and restoration method for black and odorous water bodies

Abstract

The present invention provides a low-carbon treatment and restoration method for black and odorous water bodies, including a series of steps such as physical source control, live water circulation, sediment restoration, aeration and oxygenation, water quality purification, and ecological restoration. The present invention advocates "treating water by first treating sediment". According to the method of microbial enhancement, it effectively treats black and odorous rivers, specifically removes pollutants in water, quickly and effectively removes pollutants such as CODcr, NH3-N, H2S, TP, and SS in black and odorous water bodies. After treatment, each water body shows a clear color, the transparency > 50 cm, improves the polluted water quality, can save 50% of the carbon source demand, reduce 30% of the oxygen demand, and reduce 50% of the excess sludge production. Various aquatic animals and submerged plants can be seen, there is no obvious odor on-site, the water environment is significantly improved, and it promotes the sustainable development of the social ecology.

Description

[0001] Field of the method

[0002] The present invention relates to the field of water area treatment, and particularly relates to a low-carbon treatment and restoration method for black and odorous water bodies.

[0003] Background method

[0004] Black and odorous water bodies are one of the main problems faced by water pollution control in China. Due to the excessive discharge of domestic sewage and industrial wastewater, the eutrophication of some water bodies in rural and urban areas is serious; secondly, microorganisms multiply excessively in the water body, consuming a large amount of oxygen, resulting in a serious decline in the oxygen concentration of the water body, forming an oxygen-deficient water body, anaerobic bottom mud, and microorganisms decomposing organic matter into sulfides in the anaerobic environment, causing the water body to turn black and emit an odor. The existence of black and odorous water bodies not only destroys the balance of the ecosystem, but also affects the living environment and physical health of humans.

[0005] The main cause of black and odor is the serious lack of dissolved oxygen in the water body due to the degradation of organic pollutants. At the same time, the release of pollutants in the inner courtyard of the eutrophic bottom mud of the water body is also a factor causing black and odor. The water body appears black mainly due to the accumulation of black substances. The black substances in the water mainly include insoluble substances in solid state or adsorbed on suspended solids, and two types of colored compounds soluble in water. The elements and existing forms of the blackening substances are mainly Fe, S, and FeS, among which Fe 2+ plays a leading role in blackening. The forms of S in the water body include organic sulfur, sulfate, sulfide, and elemental sulfur, etc. When the water body presents an anaerobic and oxygen-deficient state, organic sulfur will accelerate the decomposition to generate odor-causing substances such as H2S and NH3;

[0006] At present, the treatment concepts of many black and odorous water bodies are still slightly lagging behind. Some black and odorous water body treatment projects have taken targeted methods and measures to comprehensively treat black and odorous river channels, and have eliminated the black and odor phenomena and purified the water quality well. However, the water quality begins to deteriorate repeatedly after a long time. Therefore, the treatment of black and odorous water bodies should be considered in the long term. It is not only necessary to eliminate black and odor, but more importantly, to focus on the long-term improvement and maintenance of water quality, establish a good water body ecosystem, and ensure the long-term stability of the water quality improvement effect. Summary of the invention

[0007] In view of this, the present invention proposes a low-carbon treatment and restoration method for black and odorous water bodies to solve the above problems.

[0008] The method scheme of the present invention is realized as follows: A low-carbon treatment and restoration method for black and odorous water bodies: including the following steps:

[0009] S1. Physical source purification: Clean the garbage around the water body and salvage the suspended algae plants in the water body;

[0010] S2, Live Water Circulation: Install multiple sections of live water treatment propellers in the water body. The water replacement volume is 12 - 18% of the total volume, and the water replacement interval is 1 - 3 days.

[0011] S3, Sediment Remediation: Add a bottom quality improver with a dosage of 0.05 - 0.3 kg / m 3 , to restore the vitality of indigenous microorganisms in the polluted environment, thereby promoting the degradation of pollutants in the sediment.

[0012] S4, Aeration and Oxygenation: Use an ultra - micro bubble generator to jet - aerate the sediment. The oxygenation amount is 0.2 - 0.4 L / min, the flow rate is 70 - 90 m 3 / h, and the lift is 8 - 12 m. The main purpose of the oxygenation method is to increase the dissolved oxygen concentration in the water body. By increasing the concentration, the self - purification ability of the water body is enhanced, and the anaerobic state of the water body can be inhibited to a certain extent.

[0013] S5, Water Quality Purification: After aeration and oxygenation, add a purifying agent to the water body with a dosage of 0.3 - 1.2 kg / m 3 , stir and then let it stand. The purifying agent includes the following raw materials in parts by weight: 12 - 20 parts of nano - zero - valent iron powder, 3 - 8 parts of magnetic particles, 1 - 2.8 parts of pyrite powder, 3 - 5 parts of pyrite, 3 - 10 parts of pyrophyllite powder, 6 - 10 parts of palm leaf powder, and 0.2 - 0.8 parts of sodium citrate; Use the water purifying agent to precipitate and separate the colloid in the water body.

[0014] S6, Ecological Restoration: Plant submerged plants and emergent plants in the treated sediment respectively. The submerged plants are planted by cutting, and the depth planted into the sediment is 15 - 25 cm. Use the treated sludge as compost for resource utilization.

[0015] Furthermore, the bubbles generated by the live water in S2 include three particle sizes: large, medium, and small. The large bubbles are > 100 μm, which are used for stripping the water body and the bottom sediment, and forcing the water body to flow in a circular manner. The medium - sized bubbles are 25 - 100 μm, which achieve efficient oxygen - enrichment. The small bubbles are 0.5 - 20 μm. Utilizing the large specific surface area and high oxygen mass transfer coefficient, they promote water quality purification.

[0016] Furthermore, the bottom quality improver includes the following raw materials in parts by weight: 15 - 25 parts of ternary composite coagulant, 2 - 8 parts of polyacrylamide, 1 - 3 parts of hydroxypropyl starch, 0.3 - 0.9 parts of sorbitol, 8 - 12 parts of composite bacterial powder, and 1 - 5 parts of composite enzyme.

[0017] Furthermore, the ternary composite coagulant is a coagulant of polyaluminum chloride - aluminum sulfate - polyaluminum ferric chloride (PAC - AS - PAFC) with a mass ratio of (1.3 - 3.2):(0.1 - 4.0):(1.0 - 1.2).

[0018] Further, the compound bacterial powder is a bacterial powder of Micrococcus luteus, Rhodospirillum sp., and Bacillus natto in a mass ratio of (3-5):(1-3):(5-8).

[0019] Further, the viable count of Micrococcus luteus is 1-8×10 8 cfu / ml, the viable count of Rhodospirillum sp. is 5-10×10 8 cfu / ml, and the viable count of Bacillus natto is 6-9×10 7 cfu / ml.

[0020] Further, the compound enzyme is a hydrolase, a lyase, and a mannanase in a mass ratio of 3-5:0.3-1.2:2.

[0021] Further, the submerged plants are any one or a combination of Potamogeton malaianus, Potamogeton pectinatus, Ceratophyllum demersum, Elodea nuttallii, and Hydrilla verticillata, and the emergent plants include any one or a combination of Phragmites australis, Acorus tatarinowii, Nelumbo nucifera, or Thalia dealbata.

[0022] Compared with the existing methods, the beneficial effects of the present invention are as follows:

[0023] The method for treating black and odorous water bodies of the present invention includes a series of steps such as physical source control, live water circulation, sediment remediation, aeration and oxygenation, water quality purification, and ecological restoration. By adding a bottom quality improver and limiting the dosage, it can effectively restore the vitality of indigenous microorganisms in the polluted environment, thereby promoting the degradation of pollutants in the sediment. The combination of sediment remediation + aeration and oxygenation + water quality purification, the compound bacterial powder and the compound enzyme can accelerate the oxidation and decomposition of organic pollutants and ammonia nitrogen. Increasing the aeration measure can significantly exert the oxidation performance of the bacteria. The purifying agent can effectively precipitate and separate colloids and sulfides in the water body, saving 50% of the carbon source demand, reducing 30% of the oxygen demand, and reducing 50% of the excess sludge production. The present invention advocates "treating water by treating mud" and, based on the microbial enhancement method, effectively treats black and odorous rivers, specifically removes pollutants in the water, quickly and effectively removes pollutants such as CODcr, NH3-N, H2S, TP, and SS in the black and odorous water bodies. After treatment, each water body shows a clear color, the transparency > 50 cm, the polluted water quality is improved, various aquatic animals and submerged plants can be seen, there is no obvious odor on site, the water environment is significantly improved, and the sustainable development of the social ecology is promoted. Specific Embodiments

[0024] To better understand the content of the method of the present invention, specific examples are provided below to further illustrate the present invention.

[0025] The experimental methods used in the embodiments of the present invention are all conventional methods unless otherwise specified.

[0026] The materials, reagents, etc. used in the embodiments of the present invention can be obtained from commercial channels unless otherwise specified.

[0027] Example 1

[0028] A low-carbon treatment and restoration method for black and odorous water bodies, comprising the following steps:

[0029] S1. Physical source purification: Clean the garbage around the water body and salvage the suspended algae plants in the water body;

[0030] S2. Active water circulation: Set multiple sections of active water treatment propellers in the water body, the water replacement volume is 12% of the total volume, and the water replacement interval is 1 d; The bubbles generated by the active water include three particle sizes of large, medium and small. The large bubbles are >100 μm, the medium bubbles are 25-100 μm, and the small bubbles are 0.5-20 μm. Utilize the large specific surface area and high oxygen mass transfer coefficient to promote water quality purification;

[0031] S3. Sediment restoration: Add a bottom quality improver, and the addition amount is 0.05 kg / m 3 , The bottom quality improver includes the following raw materials in parts by weight: 15 parts of ternary composite coagulant, 2 parts of polyacrylamide, 1 part of hydroxypropyl starch, 0.3 part of sorbitol, 8 parts of composite bacterial powder, 1 part of composite enzyme; The ternary composite coagulant is a polyaluminum chloride-aluminum sulfate-polyaluminum chloride-iron coagulant with a mass ratio of 1.3:0.1:1.0; The composite bacterial powder is a mass ratio of 3:1:5 of Micrococcus luteus bacterial powder, Rhodospirillum bacterial powder, and Bacillus natto bacterial powder; The viable count of Micrococcus luteus is 1×10 8 cfu / ml, the viable count of Rhodospirillum is 5×10 8 cfu / ml, the viable count of Bacillus natto is 6×10 7 cfu / ml; The composite enzyme is a mass ratio of 3:0.3:2 of hydrolase, lyase, and mannanase;

[0032] S4. Aeration and oxygenation: Use an ultramicrobubble generator to jet aerate the bottom mud, the oxygen filling amount is 0.2 L / min, the flow rate is 70 m 3 / h, and the lift is 8 m;

[0033] S5. Water quality purification: After aeration and oxygenation, add a purifying agent to the water body, and the addition amount is 0.3 kg / m 3 , After stirring, let it stand. The purifying agent includes the following raw materials in parts by weight: 12 parts of nano zero-valent iron powder, 3 parts of magnetic particles, 1 part of pyrite powder, 3 parts of pyrite, 3 parts of pyrophyllite powder, 6 parts of palm leaf skin powder, 0.2 part of sodium citrate;

[0034] S6. Ecological restoration: Plant submerged plants and emergent plants in the treated bottom mud respectively. The submerged plants are planted by cutting, and the depth planted into the bottom mud is 15-25 cm; The submerged plants include Potamogeton malaianus, Potamogeton pectinatus, Ceratophyllum demersum, Elodea nuttallii, Hydrilla verticillata, and the emergent plants include Phragmites australis, Acorus tatarinowii, Nelumbo nucifera, or Thalia dealbata.

[0035] Example 2

[0036] A low-carbon treatment and restoration method for black and odorous water bodies, comprising the following steps:

[0037] S1. Physical source purification: Clean the garbage around the water body and salvage the suspended algae plants in the water body;

[0038] S2. Active water circulation: Set multiple sections of active water treatment propellers in the water body, the water replacement volume is 18% of the total volume, and the water replacement interval is 3 days; The bubbles generated by the active water include three particle sizes: large, medium, and small. The large bubbles are >100μm, the medium bubbles are 25-100μm, and the small bubbles are 0.5-20μm. Utilize the large specific surface area and high oxygen mass transfer coefficient to promote water quality purification;

[0039] S3. Sediment restoration: Add a bottom quality improver, and the dosage is 0.3 kg / m 3 , The bottom quality improver includes the following raw materials in parts by weight: 25 parts of ternary composite coagulant, 8 parts of polyacrylamide, 3 parts of hydroxypropyl starch, 0.9 part of sorbitol, 12 parts of composite bacterial powder, 5 parts of composite enzyme; The ternary composite coagulant is a polyaluminum chloride-aluminum sulfate-polyaluminum chloride iron coagulant with a mass ratio of 3.2:4.0:1.2; The composite bacterial powder is a Micrococcus luteus bacterial powder, Rhodospirillum bacterial powder, and Bacillus natto bacterial powder with a mass ratio of 5:3:8; The viable count of Micrococcus luteus is 8×10 8 cfu / ml, the viable count of Rhodospirillum is 10×10 8 cfu / ml, the viable count of Bacillus natto is 9×10 7 cfu / ml; The composite enzyme is a hydrolase, lyase, and mannanase with a mass ratio of 5:1.2:2;

[0040] S4. Aeration and oxygenation: Use an ultra-fine bubble generator to jet aerate the bottom mud, the oxygen filling amount is 0.4 L / min, the flow rate is 90 m 3 / h, and the head is 12 m;

[0041] S5. Water quality purification: After aeration and oxygenation, add a purifying agent to the water body, and the input amount is 1.2 kg / m 3 , Stir and then let it stand. The purifying agent includes the following raw materials in parts by weight: 20 parts of nano zero-valent iron powder, 8 parts of magnetic particles, 2.8 parts of pyrite powder, 5 parts of pyrite, 10 parts of pyrophyllite powder, 10 parts of palm leaf skin powder, 0.8 part of sodium citrate;

[0042] S6. Ecological restoration: Plant submerged plants and emergent plants in the treated bottom mud respectively. The submerged plants are planted by cutting, and the depth planted into the bottom mud is 15-25 cm; The submerged plants include Potamogeton malaianus, Potamogeton pectinatus, Ceratophyllum demersum, Elodea nuttallii, Hydrilla verticillata, and the emergent plants include Phragmites australis, Acorus tatarinowii, Nelumbo nucifera, or Thalia dealbata.

[0043] Example 3

[0044] A low-carbon treatment and restoration method for black and odorous water bodies includes the following steps:

[0045] S1. Physical source purification: Clean the garbage around the water body and salvage the suspended algae plants in the water body;

[0046] S2. Live water circulation: Install multiple sections of live water treatment propellers in the water body, with the water replacement volume being 15% of the total volume and the water replacement interval being 2 days; The bubbles generated in the live water include three particle sizes: large, medium, and small. The large bubbles are > 100 μm, the medium bubbles are 25 - 100 μm, and the small bubbles are 0.5 - 20 μm. Utilize the large specific surface area and high oxygen mass transfer coefficient to promote water quality purification;

[0047] S3. Sediment restoration: Add a bottom quality improver, with the addition amount being 0.2 kg / m 3 , and the bottom quality improver includes the following raw materials in parts by weight: 20 parts of ternary composite coagulant, 5 parts of polyacrylamide, 2 parts of hydroxypropyl starch, 0.6 part of sorbitol, 10 parts of composite bacterial powder, 3 parts of composite enzyme; The ternary composite coagulant is a coagulant of polyaluminum chloride - aluminum sulfate - polyaluminum chloride - ferric chloride with a mass ratio of 2.5:2:1.1; The composite bacterial powder is a bacterial powder of Micrococcus luteus, Rhodospirillum, and Bacillus natto with a mass ratio of 4:2:7; The viable count of Micrococcus luteus is 3×10 8 cfu / ml, the viable count of Rhodospirillum is 8×10 8 cfu / ml, and the viable count of Bacillus natto is 7×10 7 cfu / ml; The composite enzyme is a hydrolase, lyase, and mannanase with a mass ratio of 4:0.8:2;

[0048] S4. Aeration and oxygenation: Use an ultra - micro bubble generator to jet - aerate the bottom mud, with the oxygen filling amount being 0.3 L / min, the flow rate being 80 m 3 / h, and the lift being 10 m;

[0049] S5. Water quality purification: After aeration and oxygenation, add a purifying agent to the water body, with the addition amount being 0.8 kg / m 3 , stir and then let it stand. The purifying agent includes the following raw materials in parts by weight: 16 parts of nano - zero - valent iron powder, 5 parts of magnetic particles, 2.0 parts of pyrite powder, 4 parts of pyrite, 6 parts of pyrophyllite powder, 8 parts of palm leaf skin powder, 0.5 part of sodium citrate;

[0050] S6. Ecological restoration: Plant submerged plants and emergent plants in the treated bottom mud respectively. The submerged plants are planted by cutting, and the depth of planting into the bottom mud is 15 - 25 cm; The submerged plants include Potamogeton malaianus, Potamogeton pectinatus, Ceratophyllum demersum, Elodea nuttallii, Hydrilla verticillata, and the emergent plants include Phragmites australis, Acorus tatarinowii, Nelumbo nucifera, or Thalia dealbata.

[0051] Example 4

[0052] A low-carbon treatment and restoration method for black and odorous water bodies, comprising the following steps:

[0053] S1. Physical source purification: Cleaning the garbage around the water body and salvaging the suspended algal plants in the water body;

[0054] S2. Living water circulation: Installing multiple sections of living water treatment propellers in the water body, with the water exchange volume being 15% of the total volume and the water exchange interval being 2 days; the bubbles generated in the living water include three particle sizes of large, medium, and small. The large bubbles are > 100 μm, the medium bubbles are 25 - 100 μm, and the small bubbles are 0.5 - 20 μm. Utilizing the large specific surface area and high oxygen mass transfer coefficient to promote water quality purification;

[0055] S3. Sediment restoration: Adding a bottom quality improver, with the addition amount being 0.2 kg / m 3 , and the bottom quality improver comprises the following raw materials in parts by weight: 15 parts of ternary composite coagulant, 2 parts of polyacrylamide, 1 part of hydroxypropyl starch, 0.3 part of sorbitol, 8 parts of composite bacterial powder, and 1 part of composite enzyme; the ternary composite coagulant is a coagulant of polyaluminum chloride - aluminum sulfate - polyaluminum chloride - iron with a mass ratio of 2.5:2:1.1; the composite bacterial powder is a bacterial powder of Micrococcus luteus, Rhodospirillum, and Bacillus natto with a mass ratio of 4:2:7; the viable count of Micrococcus luteus is 3×10 8 cfu / ml, the viable count of Rhodospirillum is 8×10 8 cfu / ml, and the viable count of Bacillus natto is 7×10 7 cfu / ml; the composite enzyme is a hydrolase, lyase, and mannanase with a mass ratio of 4:0.8:2;

[0056] S4. Aeration and oxygenation: Using an ultra - micro bubble generator to jet - aerate the bottom mud, with the oxygen charging amount being 0.3 L / min, the flow rate being 80 m 3 / h, and the lift being 10 m;

[0057] S5. Water quality purification: After aeration and oxygenation, adding a purifying agent to the water body, with the addition amount being 0.8 kg / m 3 , stirring and then standing still. The purifying agent comprises the following raw materials in parts by weight: 12 parts of nano - zero - valent iron powder, 3 parts of magnetic particles, 1 part of pyrite powder, 3 parts of pyrite, 3 parts of pyrophyllite powder, 6 parts of palm leaf skin powder, and 0.2 part of sodium citrate;

[0058] S6. Ecological restoration: Planting submerged plants and emergent plants in the treated bottom mud respectively. The submerged plants are planted by cutting, and the depth of planting into the bottom mud is 15 - 25 cm; the submerged plants include Potamogeton malaianus, Potamogeton pectinatus, Ceratophyllum demersum, Elodea nuttallii, Hydrilla verticillata, and the emergent plants include Phragmites australis, Acorus tatarinowii, Nelumbo nucifera, or Thalia dealbata.

[0059] Example 5

[0060] A low-carbon treatment and restoration method for black and odorous water bodies, comprising the following steps:

[0061] S1. Physical source purification: Clean the garbage around the water body and salvage the suspended algae plants in the water body;

[0062] S2. Living water circulation: Set multiple sections of living water treatment propellers in the water body, the water replacement volume is 15% of the total volume, and the water replacement interval is 2 days; The bubbles generated in the living water include three particle sizes of large, medium and small. The large bubbles are >100μm, the medium bubbles are 25-100μm, and the small bubbles are 0.5-20μm. Utilize the large specific surface area and high oxygen mass transfer coefficient to promote water quality purification;

[0063] S3. Sediment restoration: Add a bottom quality improver, and the addition amount is 0.2 kg / m 3 , and the bottom quality improver includes the following raw materials in parts by weight: 25 parts of ternary composite coagulant, 8 parts of polyacrylamide, 3 parts of hydroxypropyl starch, 0.9 part of sorbitol, 12 parts of composite bacterial powder, 5 parts of composite enzyme; The ternary composite coagulant is a polyaluminum chloride-aluminum sulfate-polyaluminum chloride iron coagulant with a mass ratio of 2.5:2:1.1; The composite bacterial powder is a mass ratio of 4:2:7 of Micrococcus luteus bacterial powder, Rhodospirillum bacterial powder, and Bacillus natto bacterial powder; The viable count of Micrococcus luteus is 3×10 8 cfu / ml, the viable count of Rhodospirillum is 8×10 8 cfu / ml, the viable count of Bacillus natto is 7×10 7 cfu / ml; The composite enzyme is a mass ratio of 4:0.8:2 of hydrolase, lyase, and mannanase;

[0064] S4. Aeration and oxygenation: Use an ultra-fine bubble generator to jet aerate the bottom mud, the oxygen filling amount is 0.3 L / min, the flow rate is 80 m 3 / h, and the head is 10 m;

[0065] S5. Water quality purification: After aeration and oxygenation, add a purifying agent to the water body, and the addition amount is 0.8 kg / m 3 , stir and then let it stand. The purifying agent includes the following raw materials in parts by weight: 20 parts of nano zero-valent iron powder, 8 parts of magnetic particles, 2.8 parts of pyrite powder, 5 parts of pyrite, 10 parts of pyrophyllite powder, 10 parts of palm leaf skin powder, 0.8 part of sodium citrate;

[0066] S6. Ecological restoration: Plant submerged plants and emergent plants in the treated bottom mud respectively. The submerged plants are planted by cutting, and the depth planted into the bottom mud is 15-25 cm; The submerged plants include Potamogeton malaianus, Potamogeton pectinatus, Ceratophyllum demersum, Elodea nuttallii, Hydrilla verticillata, and the emergent plants include Phragmites australis, Acorus tatarinowii, Nelumbo nucifera, or Thalia dealbata.

[0067] I. Experimental verification

[0068] The treatment methods of the above-mentioned Examples 1-5 were adopted to repair the black and odorous water bodies, and the water body indexes such as CODcr, NH3-N, H2S, TP, and SS were detected after treatment. The treatment time was from May 2022 to August 2022.

[0069] (1) Test methods for water indexes:

[0070]

[0071] (2) The water body and bottom sediment in the treatment area were seriously polluted. The water body was viscous and odorous, and the bottom sediment was thick black mud paste, belonging to inferior Class V water body. All indexes seriously exceeded the standard. Among them, the exceeding multiples of NH3-N and TP contents reached 10 and 5 times respectively, and the water transparency was 10-15 cm. According to the grading standard of black and odorous water bodies in the Guidelines for the Treatment of Urban Black and Odorous Water Bodies, it had reached the level of severe black and odorous.

[0072] (3) Sampling: The water sampling time was from 3 to 4 pm every day. Samples were collected from seven points from the downstream to the upstream of the area to be treated. At 5 pm, samples were taken to analyze CODcr, NH3-N, H2S, TP, and SS, and the removal rates of each index were calculated respectively.

[0073] (4) Changes in each index after treatment

[0074]

[0075] In the formula, the indexes are CODcr, NH3-N, H2S, TP, and SS;

[0076]

[0077] From the above results, it can be seen that the treatment method of the present invention can effectively treat the black and odorous river. After treatment, each water body shows a clear color, the transparency > 50 cm, various aquatic animals and submerged plants can be seen, there is no obvious odor on site, and the water environment is significantly improved; comparing Examples 1-3 with Examples 4 and 5, the bottom sediment improver and purifying agent can play their roles better at a specific ratio.

[0078] In view of the treatment effect of the above-mentioned Example 3, the following comparative examples were set up for verification:

[0079] Comparative Example 1

[0080] The difference between this comparative example and Example 3 is that no live water circulation was set up.

[0081] Comparative Example 2

[0082] The difference between this comparative example and Example 3 is that no bottom sediment improver was put in.

[0083] Comparative Example 3

[0084] The difference between this comparative example and Example 3 is that no purification agent was added.

[0085] Comparative Example 4

[0086] The difference between this comparative example and Example 3 is that the substrate conditioner comprises the following raw materials in parts by weight: 10 parts of ternary composite coagulant, 1 part of polyacrylamide, 5 parts of hydroxypropyl starch, 1.2 parts of sorbitol, 10 parts of complex bacterial powder, and 8 parts of complex enzyme.

[0087] Comparative Example 5

[0088] The difference between this comparative example and Example 3 is that the ternary composite coagulant in the substrate conditioner is a polyaluminum chloride - aluminum sulfate - polyaluminum ferric chloride coagulant with a mass ratio of 1:1:1.

[0089] Comparative Example 6

[0090] The difference between this comparative example and Example 3 is that the purification agent comprises the following raw materials in parts by weight: 10 parts of nano zero - valent iron powder, 1 part of magnetic particles, 3 parts of pyrite powder, 2 parts of iron pyrite, 1 part of pyrophyllite powder, 5 parts of palm leaf powder, and 0.1 part of sodium citrate.

[0091] Comparative Example 7

[0092] The difference between this comparative example and Example 3 is that no aeration and oxygenation were carried out.

[0093] Referring to the above test method, the treatment methods of Comparative Examples 1 - 7 were used to treat the black - smelly water body, and the treatment results were compared with those of Example 3. The comparison results are as follows:

[0094]

[0095] From the above analysis of the data results, compared with Comparative Example 1, the water cycle can effectively inhibit the generation of black and odorous water bodies and effectively treat slow-flow black and odorous water bodies; compared with Comparative Example 2, the substrate conditioner of the present invention repairs the substrate, and the composite bacterial powder and composite enzyme can accelerate the oxidation and decomposition of organic pollutants and ammonia nitrogen. The addition of the aeration measure can significantly exert the oxidation performance of the bacteria. In Comparative Example 7, the repair effect of the substrate conditioner alone on the substrate is poor under the condition of lack of sufficient oxygen; compared with Comparative Examples 3 and 6, the purifying agent can effectively precipitate and separate colloids and sulfides in the water body; compared with Comparative Example 4, the substrate conditioner can restore the vitality of indigenous microorganisms in the polluted environment of the substrate at a specific ratio, thereby promoting the degradation of pollutants in the substrate. Compared with Comparative Example 5, the ternary composite coagulant selects polyaluminum chloride-aluminum sulfate-polyaluminum ferric chloride coagulant and can better improve the sedimentation ability of the water body at a specific ratio; compared with Comparative Example 7, it can effectively increase the dissolved oxygen concentration in the water body and strengthen the self-purification ability of the water body by increasing the concentration, and can inhibit the anaerobic state of the water body to a certain extent.

[0096] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A low-carbon treatment and restoration method for black and odorous water bodies, characterized in that: It includes the following steps: S1. Physical source purification: Clean the garbage around the water body and salvage the suspended algae in the water body; S2. Active water circulation: Install multiple sections of active water treatment propellers in the water body, with the water replacement volume being 12-18% of the total volume and the water replacement interval being 1-3 days; S3. Sediment remediation: Add a bottom quality improver with a dosage of 0.05 - 0.3 kg / m 3 ; S4. Aeration and oxygenation: Use an ultra - micro bubble generator to jet - aerate the bottom sludge, with an oxygen - charging amount of 0.2 - 0.4 L / min, a flow rate of 70 - 90 m 3 / h, and a head of 8 - 12 m; S5. Water purification: After aeration and oxygenation, a purifying agent is added to the water body, and the dosage is 0.3 - 1.2 kg / m 3 , and after stirring, it is left to stand. The purifying agent comprises the following raw materials in parts by weight: 12 - 20 parts of nano zero-valent iron powder, 3 - 8 parts of magnetic particles, 1 - 2.8 parts of pyrite powder, 3 - 5 parts of pyrite, 3 - 10 parts of pyrophyllite powder, 6 - 10 parts of palm leaf skin powder, 0.2 - 0.8 parts of sodium citrate; S6. Ecological restoration: Plant submerged plants and emergent plants respectively. The submerged plants are planted by cutting, and the depth of planting into the bottom mud is 15-25 cm.

2. The low-carbon treatment and restoration method for black and odorous water bodies according to claim 1, wherein: The bubbles generated by the active water in S2 include three particle sizes: large, medium, and small. The large bubbles are >100 μm, the medium bubbles are 25-100 μm, and the small bubbles are 0.5-20 μm.

3. The low-carbon treatment and restoration method for black and odorous water bodies according to claim 1, characterized in that: The bottom quality improver includes the following raw materials in parts by weight: 15-25 parts of ternary composite coagulant, 2-8 parts of polyacrylamide, 1-3 parts of hydroxypropyl starch, 0.3-0.9 parts of sorbitol, 8-12 parts of composite bacterial powder, and 1-5 parts of composite enzyme.

4. The low-carbon treatment and restoration method for black and odorous water bodies according to claim 3, characterized in that: The ternary composite coagulant is a coagulant of polyaluminum chloride, aluminum sulfate, and polyaluminum chloride iron with a mass ratio of (1.3-3.2):(0.1-4.0):(1.0-1.2).

5. The low-carbon treatment and restoration method for black and odorous water bodies according to claim 3, characterized in that: The composite bacterial powder is a bacterial powder of Micrococcus luteus, Rhodospirillum, and Bacillus natto with a mass ratio of (3-5):(1-3):(5-8).

6. The low-carbon treatment and restoration method for black and odorous water bodies according to claim 5, characterized in that: The viable count of Staphylococcus luteus is 1 - 8×10 8 cfu / ml, the viable count of Rhodospirillum is 5 - 10×10 8 cfu / ml, and the viable count of Bacillus natto is 6 - 9×10 7 cfu / ml.

7. The low-carbon treatment and restoration method for black and odorous water bodies according to claim 3, characterized in that: The composite enzyme is a composite of hydrolase, lyase, and mannanase with a mass ratio of 3-5:0.3-1.2:

2.

8. A low-carbon treatment and restoration method for black and odorous water bodies as described in claim 1, characterized in that: The submerged plants in S6 are any one or a combination of Potamogeton malaianus, Potamogeton pectinatus, Ceratophyllum demersum, Elodea nuttallii, or Hydrilla verticillata, and the emergent plants are any one or a combination of Phragmites australis, Acorus tatarinowii, Nelumbo nucifera, or Thalia dealbata.

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