Microbial composite material, method of preparation and use thereof

Abstract

The present application relates to the field of ecological water body treatment, in order to solve the river and creek endogenous pollution, realize the rapid degradation of water pollutants, eliminate black and odorous, restore the water ecosystem, and achieve the purpose of improving the self-purification capacity of water body. The present application provides a kind of microbial composite material, preparation and application, the composite material includes the following mass fraction of components: calcium sulfate 10-30 parts, zeolite powder 5-10 parts, montmorillonite powder 10-25 parts, volcanic rock powder 1-10 parts, diatom powder 1-10 parts, polymeric aluminum silicate iron 8-15 parts, ferrite powder 2-20 parts, citric acid powder 10-20 parts, and complex microbial flora. The microbial composite material is used for black and odorous water treatment, and is excellent in river, reservoir, lake pollution treatment ecological restoration and sludge harmless and reduction treatment.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of water ecological restoration, and more particularly to a black and odorous water treatment using a microbial composite material. BACKGROUND

[0002] In recent years, the discharge of domestic sewage and industrial wastewater has become the main source of river pollution. Black and odorous water not only destroys the river ecosystem, but also seriously affects the urban landscape and urban living environment, and has attracted widespread attention.

[0003] Source control and sewage interception are the most effective engineering measures for black and odorous water treatment, and are also the premise of other pollution control techniques. However, the sewage interception and pipe system upgrading and reconstruction are difficult due to the long construction period, the existing underground pipelines in old urban areas, crowded ground buildings, and narrow road surfaces. In some urban areas, old pipe networks cannot be reconstructed, and only river sewage interception can be used, which greatly increases the construction difficulty and affects the progress of the sewage interception project.

[0004] Moreover, in reality, many cities have unreasonable sewage interception and pipe system facilities constructed in early years, different standards of urban drainage pipe network construction, pipe network misconnection or mixing, and inadequate operation and maintenance, which make the core measure of black and odorous water treatment, i.e., source control and sewage interception, unable to play its role in time.

[0005] As of now, according to incomplete statistics, the average sewage interception and pipe system rate of cities above the prefecture level is still low, and the pipe system lag will still restrict water quality improvement for a considerable period of time. The problem of river "black and odorous return" occurs in the rainy season. In addition to the above reasons, the comprehensive disposal of river pollution sediment is also an important problem, which is caused by the lack of technology and concept. The main problems are that the technology is too single, there is a fixed mindset, the disposal cost is high, and the sustainability is low. SUMMARY

[0006] To solve the above technical problems, the present application develops a black and odorous water treatment technology that can eliminate black and odor, has stable effect, and does not return to black and odor, to solve the endogenous pollution of rivers and streams, achieve rapid degradation of water pollutants, eliminate black and odor, restore the water ecosystem, and improve the self-purification capacity of the water.

[0007] The present application adopts high-efficiency microbial composite material to repair and treat the ecology of black and odorous water body. The high-efficiency microbial composite material is composed of various microorganisms and inorganic minerals, is completely environmentally friendly and harmless, has simple construction and short construction period, can play a dual role of in-situ repair and degradation of water pollution, can chelate and solidify heavy metals, degrade organic matter in endogenous pollution, and at the same time, the slow-release oxygen-increasing function of the material provides a kind of oxidation pond environment for microorganisms, activates local microorganisms, and improves the self-purification capacity of the water body. Long-term treatment of the water body is formed, and the effect and goal of "ecological dredging", "mud and water co-treatment" are achieved. The composite material can be applied to various polluted water bodies, and the material is environmentally friendly and harmless.

[0008] In order to treat black and odorous water body, the research and development team has carried out repeated technical research and development, and the microbial composite material includes the following components by mass fraction: calcium sulfate 10-30 parts, zeolite powder 5-10 parts, montmorillonite powder 10-25 parts, volcanic rock powder 1-10 parts, diatom powder 1-10 parts, polyaluminum ferric silicate 8-15 parts, ferrite powder 2-20 parts, citric acid powder 10-20 parts, and composite bacterial flora;

[0009] The composite bacterial flora includes 3-6 parts of bacteria a, 3-6 parts of bacteria b, 5-8 parts of bacteria c, 6-10 parts of bacteria d, and 5-10 parts of bacteria e.

[0010] The bacteria a are nitrobacter, coccus or spirillum bacteria.

[0011] The bacteria b are subsulfolobus, coccus or subye bacteria.

[0012] The bacteria c are paracoccus or pseudomonas stutzeri bacteria.

[0013] The bacteria d are aeromonas, pseudomonas or acinetobacter bacteria.

[0014] The bacteria e are bacillus bacteria.

[0015] Through further screening of the bacterial flora, the bacteria a are preferably Nitrobacter winogradskyi, the bacteria b are preferably Nitrosomonas europaea, the bacteria c are preferably Pseudomonas stutzeri, the bacteria d are preferably Aeromonas sobria, and the bacteria e are preferably Bacillus subtilis, and a more excellent treatment effect can be achieved.

[0016] As preferred, the composite material comprises the following components by mass fraction: calcium sulfate 15-25 parts, zeolite powder 6-8 parts, montmorillonite powder 10-20 parts, volcanic rock powder 4-8 parts, diatom powder 4-8 parts, polymeric aluminum ferric silicate 10-13 parts, ferrite powder 5-15 parts, citric acid powder 14-18 parts, and a composite microbial population, wherein the composite microbial population comprises: 4-5 parts of bacteria a, 4-5 parts of bacteria b, 5-7 parts of bacteria c, 7-9 parts of bacteria d, and 7-9 parts of bacteria e.

[0017] As preferred, the composite material comprises the following components by mass fraction: calcium sulfate 20 parts, zeolite powder 7 parts, montmorillonite powder 15 parts, volcanic rock powder 5 parts, diatom powder 5 parts, polymeric aluminum ferric silicate 12 parts, ferrite powder 10 parts, citric acid powder 16 parts, and a composite microbial population, wherein the composite microbial population comprises: 5 parts of bacteria a, 5 parts of bacteria b, 7 parts of bacteria c, 8 parts of bacteria d, and 8 parts of bacteria e.

[0018] The present inventors found in the development experiments that the feeding sequence of the materials has certain influence on obtaining a uniformly mixed system. It is found through experiments that the following sequence of mixing materials is beneficial to obtaining a more uniformly dispersed composite material:

[0019] In the first step, the following components are weighed by weight fraction: calcium sulfate, zeolite powder, montmorillonite powder, bacteria a, and bacteria b, and the above components are uniformly mixed to prepare a mixture 1;

[0020] In the second step, the following components are weighed by weight fraction: volcanic rock powder, diatom powder, polymeric aluminum ferric silicate, bacteria c, and bacteria d, and the above components are uniformly mixed to prepare a mixture 2;

[0021] In the third step, the following components are weighed by weight fraction: ferrite powder, citric acid powder, and bacteria e, and the above components are uniformly mixed to prepare a mixture 3;

[0022] In the fourth step, the mixtures 1, 2, and 3 are uniformly mixed to obtain the microbial composite material for treating black and odorous water bodies.

[0023] The microbial composite material is used for treating black and odorous water bodies, which include but are not limited to river channels, reservoirs, lakes, and the like.

[0024] The present application mainly utilizes the characteristics of the silicon, aluminum, iron, and calcium inorganic active oxides in the composite material to preferentially activate the microorganisms in the material that can rapidly decompose organic matter in the water body, and gradually activate the natural microorganisms in the sediment, so as to degrade the organic and inorganic pollutants in the water body and the sediment through the metabolism of the microorganisms.

[0025] Through the active oxide slow-release oxygen function of the composite material, the organic matter in the oxidation of the sediment is oxidized to form loose and breathable sediment, which can be used as a microbial carrier of the sediment, and can also help the release of small molecular nutrients in the sediment, so that the microorganisms can absorb and utilize them, and can also improve the redox potential of the water body to form a good growth environment for the microorganisms in the water body, and finally restore the ecological self-purification function of the water body.

[0026] The inorganic minerals such as silicon, aluminum, iron and calcium in the composite material can effectively chelate and adsorb total phosphorus in the water body, flocculate and settle particulate suspended matter, and improve the transparency of the water body. Through chelation and passivation, the heavy metals in the water body, especially lead, chromium and zinc, are solidified into the sediment, and the chelated and solidified heavy metals are no longer released into the water environment, solving the problem of heavy metal pollution in the water body. After treatment, the pH of the sediment is maintained in the range of 6-9, and the sediment slowly changes into mineralized sediment after 3 months.

[0027] Compared with the existing traditional black and odorous water treatment scheme, the technical scheme of the present application has the following advantages:

[0028] ①Short time and quick effect: the efficient microbial composite material can eliminate the black and odorous river in a short time (1-5 days) and improve the water quality. Not only can it quickly and effectively remove pollutants, but also can restore the ecological system of the water body and increase the self-purification function of the water body.

[0029] ②Environment-friendly and non-toxic: according to the monitoring of the authoritative agency, the heavy metal indicators are lower than the detection limit, and have no toxic effect on the river organisms.

[0030] ③Transforming corruption into life and activating microorganisms: the organic matter, inorganic matter and nitrogen and phosphorus substances in the water body are transformed into effective nutrient substances that can be utilized by microorganisms and participate in the circulation of the ecological chain.

[0031] ④Stable effect and reduction of secondary pollution: the free heavy metals in the water body can be solidified and chelated in the sediment, and will not be dissolved again, thus reducing the secondary pollution.

[0032] ⑤In-situ treatment and short construction period: the construction is simple, fast and short in period, and the river does not need to be diverted, so the pollution sediment in the river can be reduced in-situ without dredging, the engineering quantity is small, the influence on the surrounding environment is small, and there is no secondary pollution problem caused by traditional sludge transportation.

[0033] The efficient microbial composite material black and odorous water ecological restoration technology of the present application is an in-situ ecological restoration technology for "mud and water treatment", which is an important measure to realize water environment treatment and sustainable development of water resources. Through restoration, the concentration of water pollutants is significantly reduced, the concentration of dissolved oxygen is improved, the biodiversity is increased, and the ecological environment of the water body is significantly improved. This technology has important significance for improving the regional water environment and improving the living environment of the surrounding residents.

[0034] The black and odorous water body treatment is an important measure to realize energy saving and emission reduction, an effective means to protect the environment and improve the ecological landscape value, and effectively solves the practical problems of urban development. The black and odorous water body treatment can promote ecological environment protection, improve people's livelihood, and is conducive to improving the ecological landscape value of urban water body and promoting the coordinated development of regional economy, providing strong support for realizing the strategic goal of energy saving and emission reduction and sustainable utilization of water resources.

[0035] The black and odorous water body treatment technology using high-efficiency microbial composite material for in-situ treatment of black and odorous water body has the advantages of less initial investment, ecological safety, low energy consumption, quick effect, small construction area, no need for professional operation, low operation cost, and obvious economic benefit. The black and odorous water body treatment technology using high-efficiency microbial composite material is a low-cost and quick-effect in-situ treatment technology for black and odorous water body. The technology is simple in construction, friendly to the environment, good in treatment effect, and has strong operability and replicability, and is widely applied. The treatment of black and odorous water body can effectively improve the ecological environment of water body and the living environment of surrounding residents, increase urban vitality, and a good urban environment will bring more development opportunities to the city. The improvement of ecological environment can also bring indirect economic benefits: the improvement of water environment in urban areas reduces the harm of pollutants to the health of residents, and promotes the development of tourism industry; sustainable ecological treatment means can avoid repeated investment, and is conducive to the sustainable development of urban economy. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 Satellite schematic diagram of ecological restoration range of Nantuo Port River;

[0037] Figure 2 Schematic diagram of cofferdam pretreatment technology measures for sewage outlet;

[0038] Figure 3 Comparison of effects before and after Nantuo Port River treatment project. DETAILED DESCRIPTION

[0039] The technical solutions of the present application and the technical effects thereof will be further described in combination with specific embodiments. The following description is only for the purpose of explaining the present application, but does not limit the present application in any way. Any transformation or replacement based on the teaching of the present application belongs to the protection scope of the present application. The methods described in the present application are conventional methods in the art unless otherwise specified. The reagents used are commercially available unless otherwise specified.

[0040] Example 1

[0041] Nitrobacter winogradskyi, Nitrosomonas europaea, Pseudomonas stutzeri, Aeromonas sobria, Bacillus subtilis were respectively fermented by conventional method, and the obtained fermentation liquor was centrifuged to obtain wet bacteria for standby.

[0042] The steps for preparing the composite material for treating black and odorous water body are as follows:

[0043] In the first step, the following components were weighed and mixed according to the following weight proportions and order: 20 parts of calcium sulfate, 7 parts of zeolite powder, 15 parts of montmorillonite powder, 5 parts of Nitrobacter winogradskyi, and 5 parts of Nitrosomonas europaea, to obtain a mixture 1.

[0044] In the second step, the following components were weighed and mixed according to the following weight proportions and order: 5 parts of volcanic rock powder, 5 parts of diatom powder, 12 parts of polymeric aluminum ferric silicate, 7 parts of Pseudomonas stutzeri, and 8 parts of Aeromonas sobria, to obtain a mixture 2.

[0045] In the third step, the following components were weighed and mixed according to the following weight proportions and order: 10 parts of ferrite powder, 16 parts of citric acid powder, and 8 parts of Bacillus subtilis, to obtain a mixture 3.

[0046] In the fourth step, the mixture 1, the mixture 2, and the mixture 3 were uniformly mixed to obtain the microbial composite material for treating black and odorous water body.

[0047] Example 2

[0048] The composite material of Example 1 was used for ecological restoration (black and odorous water body) project of Nantuo Port River. The Nantuo Port River is located in Nantuo Street, Tianxin District, Changsha City, and the total length of the Nantuo Port River is about 10.25 kilometers. Referring to Figure 1 (Satellite schematic diagram of ecological restoration range of Nantuo Port River).

[0049] 1. Evaluation before treatment of Nantuo Port River

[0050] The water pollution of the Nantuo Port River is quite serious. The indexes such as COD, total nitrogen, ammonia nitrogen, and total phosphorus in many sections of the river far exceed the V-class water standard. At the same time, according to the classification of urban black and odorous water body remediation work guide, some sections have already belonged to severe black and odorous, and the treatment difficulty is great.

[0051] On-site investigation was carried out on Nantuo Port River, and Changsha Huanjin Detection Technology Co., Ltd. was entrusted to sample and detect the water quality of Nantuo Port River. The specific results are shown in Table 1 below.

[0052] Table 1, on-site sampling of Nantuo Port River water quality detection data (unit mg / L)

[0053]

[0054]

[0055] Note: 1. The detection time is October 22, 2018; 2. The detection index oxidation-reduction potential is entrusted to Hunan Jingke Detection Co., Ltd. for detection and analysis, and the results come from Hunan Jingke Detection Co., Ltd.; 3. The reference standard limit value of each index is in Table 1 of "Surface Water Environmental Quality Standard" (GB3838-2002). The detection points that do not meet the requirements of Class V water quality standard are all polluted; according to the 2.3.3 black and odorous water body level determination index in "Urban Black and Odorous Water Body Remediation Guide", if more than 2 indexes of the detection point reach the "severe black and odorous" level, it should be identified as "severe black and odorous", otherwise it should be identified as "mild black and odorous".

[0056] From the on-site investigation and detection data results:

[0057] (1) The COD, BOD5, total nitrogen, ammonia nitrogen and total phosphorus of Nantuo Port River water body are all over standard, far exceeding the V-class water standard, belonging to inferior V-class water quality;

[0058] (2) Part of the domestic sewage and industrial wastewater is not effectively pretreated when discharged into the river, resulting in deterioration of water quality.

[0059] (3) According to the classification of "Urban Black and Odorous Water Body Remediation Guide", it is determined that 2 sections belong to severe black and odorous range and 3 sections belong to mild black and odorous range.

[0060] According to the actual situation of Nantuo Port River, based on water environmental capacity calculation, high-efficiency microbial composite material black and odorous water body ecological restoration technology is adopted to repair and treat the black and odorous water body of Nantuo Port River, and sewage outlet cofferdam pretreatment technology is adopted in No. 1 branch and No. 3 branch. The application effect of the technology is evaluated after river sampling and detection.

[0061] 2. Water body treatment scheme implementation

[0062] (1) Sewage outlet cofferdam pretreatment

[0063] The sewage outlet pretreatment is to treat a small amount of overflow or sewage that cannot be collected and treated by the sewage pipe. For point source pollution such as sewage outlet, a cofferdam composed of high-efficiency microbial composite material is set up at the source of No. 1 tributary, and three-stage cofferdams are set up at the source of No. 1 tributary to reduce the impact load of the discharge port pollution on the self-purification capacity of the river water body. Other sewage outlets are provided with single-stage high-efficiency microbial composite material cofferdams, and engineering measures such as Figure 2 :

[0064] The materials required for the high-efficiency microbial composite material cofferdam of No. 1 tributary are as follows:

[0065] A. 1500m 3 / d The three-stage cofferdam is made at the outlet, and 8m 3 of composite material is required.

[0066] B. The single-stage cofferdam is made at the sewage outlet of the canalized part of the vegetable field, and about 8m 3 of composite material is required.

[0067] The materials required for the high-efficiency microbial composite material cofferdam of No. 3 tributary are as follows:

[0068] The single-stage cofferdam is made at the sewage outlet of the canalized part of the vegetable field, and about 8m 3 of composite material is required.

[0069] (2) Material addition

[0070] According to the actual situation and pollution degree of the river, the high-efficiency microbial composite material is added to the polluted river section according to the local conditions, and the addition area is about 10100m 2 .

[0071] After the high-efficiency microbial composite material is transported to the project site, the composite material addition amount is determined according to the professional test ratio according to the pollution degree of the river section, water flow rate and river water volume. The addition range is generally between 0.5 and 1.5‰ of the river sludge and water volume, and the addition amount selected in this case is 1‰ of the river sludge and water volume.

[0072] When adding, the boat is used to travel on the river surface by hanging paddle machine to stir the sludge, and the high-efficiency microbial composite material is added to stir and react with the sludge.

[0073] The reaction time is 5-20min. During the reaction process, the composite material can quickly eliminate the black and odorous water body, and convert TOC in the sludge into carbohydrates to provide nutrients for microbial growth; improve the ORP of the sludge, form an oxidation pond, activate the sludge microorganisms, and enhance the self-purification capacity; solidify and chelate the free state heavy metals in the water body, without causing secondary pollution, without resolubilization, and restoring the natural ecological environment of the water body.

[0074] 3. Detection and evaluation results after the treatment of Nantuo Port River

[0075] After the treatment project, the water quality of Nantuo Port River improved significantly, and the treatment effect is shown in the following figure. There is no more stench, and the water body becomes clear.

[0076] In order to track the water quality of Nantuo Port River after the implementation of the treatment project, the third-party testing agency Guangdian Measurement Testing (Hunan) Co., Ltd. was commissioned to test the water quality. The test items included oxidation-reduction potential, dissolved oxygen, transparency, chemical oxygen demand, ammonia nitrogen, and total phosphorus. The test results are as follows:

[0077] Table 2, Changsha Tianxin District Surface Water Sampling Wastewater Test Results

[0078]

[0079] Table 3 Nantuo Port Related Areas Surface Water Sampling

[0080]

[0081] Table 4 Sediment Test Results

[0082]

[0083] From the water quality test results, it can be seen that the water quality of Nantuo Port River has changed from black and smelly to not black and not smelly. The treatment effect is significant, and the water quality parameters and water transparency have improved significantly. The black and smelly water quality improvement effect is obvious.

[0084] From the sediment test results, it can be seen that the sediment in the water body of Nantuo Port River has been treated. The heavy metal content in the sediment meets the requirements of "Soil Environmental Quality Agricultural Soil Pollution Risk Control Standard (GB15618-2018)".

[0085] In summary, the black and smelly water body ecological restoration technology of high-efficiency microbial composite material has achieved good application effect in the treatment of black and smelly water body of Changsha Nantuo Port River.

[0086] Example 3

[0087] The composite material of Example 1 was used in the black and smelly water body treatment project of Lujiazu Canal in Longguangqiao Town, Heshan District, Yiyang City. Lujiazu Canal is located near the Research Institute of Agricultural Sciences. The total length of the canal is 2600 meters, the average width of the canal is 5.5 meters, the sludge depth is 1.0 meters, and the water depth is 1.0 meters. Due to long-term pollution from external pollution sources, black and smelly water body has been formed.

[0088] 1. Lujiazu Canal Treatment Before Evaluation

[0089] On-site investigation, the main source of water pollution in Luojiazui Canal is two parts, one is the farmland irrigation, from the rotten mud lake gate water into the sludge, garbage, deposited in the river channel bottom for many years to form the black odor sludge; The second is the sewage of the Institute of Agricultural Sciences into the river, seriously polluting the river water. The high-efficiency microbial composite material is used to treat the black odor water body treatment technology to treat Luojiazui Canal in situ.

[0090] 2. Implementation of treatment scheme

[0091] (1) Block the peripheral pollution source

[0092] A three-stage cofferdam with a length of 5 meters, a width of 1.0 meters, and a height of 1.2 meters is set up at the gate of Luojiazui Canal, with a total length of 18 meters 3 , to reduce the impact load of the discharge port pollution on the river water body. The cofferdam engineering quantity is as follows:

[0093] Table 5, 1m 3 Cofferdam main engineering quantity

[0094] Ingredients Quantity Unit Composite material 50 kg Ceramsite 0.2 m3 Loess 0.4 m3 River sand 0.4 m3

[0095] A set of micro-power sewage treatment equipment with a daily treatment capacity of 7 tons is installed at the front section of the sewage inlet of the Institute of Agricultural Sciences, which can treat sewage to meet the standards and discharge into the river. The water quality meets the second standard of "Discharge Standard of Water Pollutants for Rural Domestic Sewage Treatment Facilities" DB43 / 1665-2019.

[0096] (2) Composite material addition

[0097] According to the actual situation and pollution degree of the river, high-efficiency microbial composite material is added to the polluted section of the river, with an addition area of about 4500m 2 .

[0098] After the high-efficiency microbial composite material is transported to the project site, the composite material addition amount is determined according to the professional test ratio according to the pollution degree of the river section, water flow rate and river water volume. The addition range is generally between 0.5 and 1.5‰ of the river sludge and water volume. This time, the addition amount is selected as 1‰ of the river sludge and water volume.

[0099] When adding, a paddle machine is used to stir the sludge while the ship is sailing on the river surface, and the high-efficiency microbial composite material is added to react with the sludge.

[0100] The reaction is fully stirred by a paddle stirrer, and the reaction time is 5-20 min. During the reaction, the composite functional material can quickly eliminate black odor of the water body, and convert TOC in the sediment into carbohydrates to provide nutrients for microbial growth; improve the ORP of the sediment, form an oxidation pond, activate the sediment microorganisms, and enhance the self-purification capacity; solidify the free heavy metals in the water body, without causing secondary pollution, without resolubilization, and restore the natural ecological environment of the water body.

[0101] 3. Water quality comparison before and after the treatment of Luojiazi Canal

[0102] During the treatment of Luojiazi Canal, the water quality test results are as shown in Table 6.

[0103] Table 6, water quality test data of Luojiazi Canal field sampling (unit: mg / L)

[0104]

[0105] Note: 1, the detection index of oxidation-reduction potential is entrusted to Hunan Zhengxun Testing Co., Ltd. for detection and analysis, and the result comes from Hunan Zhengxun Testing Co., Ltd.; 2, the standard limit value of each index is referred to Table 1 in “Surface Water Environmental Quality Standard” (GB3838-2002), and each detection point cannot reach the requirement of Class V water quality standard, and is polluted; according to the index data of 2 or more indexes in 2.3.3 black and odorous water body grade determination in “Urban Black and Odorous Water Body Treatment Guide”, if the detection point reaches “severe black and odorous” grade, it is determined as “severe black and odorous”, otherwise, it is determined as “mild black and odorous”.

[0106] The water quality test results show that the water body is black and odorous before the treatment, and reaches Class V water standard in “Surface Water Environmental Quality Standard” (GB3838-2002) within 3 months after the treatment, and the treatment effect is remarkable.

[0107] The third-party agency is entrusted to conduct detection, and the detection results are as follows: copper is 1 mg / Kg, zinc is 0.004 mg / Kg, lead is 0.1 mg / Kg, cadmium is 0.01 mg / Kg, total chromium is 4 mg / Kg, nickel is 3 mg / Kg, and arsenic is 0.01 mg / Kg.

[0108] From the water quality test results, it can be known that the black and odorous water body treatment of Luojiazi Canal is stable after the treatment, reaches Class V water standard in “Surface Water Environmental Quality Standard” (GB3838-2002), and achieves the expected goal.

[0109] The ecological restoration technology of high-efficiency microbial composite material for black and odorous water body has achieved good application effect in the treatment of black and odorous water body of Luojiazi in Yiyang City.

[0110] In summary, the high-efficiency microbial composite material black and odorous water treatment technology can eliminate black and odorous water, reduce pollutants in the water, and improve water transparency in a short time without destroying the natural environmental conditions of the water body based on the comprehensive use of physical and biological principles. Meanwhile, the technology can effectively reduce pollution into the river, repair the water ecosystem through sediment treatment, and improve the self-purification ability of the water body, thus creating a suitable aquatic ecological environment for aquatic plants and animals.

[0111] The application comprehensively considers the combination of water quality improvement and endogenous pollution treatment, can significantly reduce COD, nitrogen and phosphorus pollutants in the water, and can chelate heavy metal ions in the water, improve the oxidation-reduction potential, form an oxidation pond environment, and restore the self-purification ability of the water body.

[0112] The high-efficiency microbial composite material black and odorous water treatment technology is an effective way to treat black and odorous water, has the advantages of simple construction, low investment, quick effect, and long-lasting effect, meets the development needs of the black and odorous water treatment market, and has a wide application prospect in the black and odorous water treatment market.

Claims

1. A microbial composite material, characterized in that: The composite material is prepared from the following components in parts by weight: 15-25 parts calcium sulfate, 6-8 parts zeolite powder, 10-20 parts montmorillonite powder, 4-8 parts volcanic rock powder, 4-8 parts diatomaceous earth powder, 10-13 parts polyaluminum ferric silicate, 5-15 parts ferrite powder, 14-18 parts citric acid powder, and a composite microbial community, wherein the composite microbial community includes: 4-5 parts of bacteria a, 4-5 parts of bacteria b, 5-7 parts of bacteria c, 7-9 parts of bacteria d, and 7-9 parts of bacteria e; Bacterium a is Nitrobacter winogradskyi; Bacterium b is Nitrosomonas europaea; Bacterium c is Pseudomonas stutzeri; Bacterium d is Aeromonas sobria; Bacterium e is Bacillus subtilis. The composite material was obtained by the following preparation method: Step 1: Weigh out the following components by weight: calcium sulfate, zeolite powder, montmorillonite powder, bacteria a, and bacteria b. Mix the above components evenly to obtain mixture 1. The second step is to weigh out the following components by weight: volcanic rock powder, diatom powder, polyaluminum iron silicate, bacteria c, and bacteria d. Mix the above components evenly to obtain mixture 2. The third step is to weigh out the following components by weight: ferrite powder, citric acid powder, and bacteria e, and mix them evenly to obtain mixture 3. The fourth step is to mix mixtures 1, 2, and 3 evenly to obtain the microbial composite material for treating black and odorous water bodies.

2. The composite material according to claim 1, characterized in that, The composite material comprises the following components in parts by weight: 20 parts calcium sulfate, 7 parts zeolite powder, 15 parts montmorillonite powder, 5 parts volcanic rock powder, 5 parts diatomaceous earth powder, 12 parts polyaluminosilicate iron, 10 parts ferrite powder, 16 parts citric acid powder, and a composite microbial community, wherein the composite microbial community includes: 5 parts of bacteria a, 5 parts of bacteria b, 7 parts of bacteria c, 8 parts of bacteria d, and 8 parts of bacteria e.

3. A method for preparing the composite material according to claim 1 or 2: characterized in that, Step 1: Weigh out the following components by weight: calcium sulfate, zeolite powder, montmorillonite powder, bacteria a, and bacteria b. Mix the above components evenly to obtain mixture 1. The second step is to weigh out the following components by weight: volcanic rock powder, diatom powder, polyaluminum iron silicate, bacteria c, and bacteria d. Mix the above components evenly to obtain mixture 2. The third step is to weigh out the following components by weight: ferrite powder, citric acid powder, and bacteria e, and mix them evenly to obtain mixture 3. The fourth step is to mix mixtures 1, 2, and 3 evenly to obtain the microbial composite material for treating black and odorous water bodies.

4. The application of the composite material according to claim 1 or 2 in wastewater treatment, wherein the application is for the treatment of black and odorous water bodies.

5. The application as described in claim 4, characterized in that, The water bodies to be treated include rivers, reservoirs, and lakes.

6. The application as described in claim 4, characterized in that, After treatment, the pH of the bottom sediment in the water body was maintained in the range of 6 to 9.

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