CN107651754B - Composite ecological system construction method for restoring eutrophic water body and artificial reef - Google Patents
Composite ecological system construction method for restoring eutrophic water body and artificial reef Download PDFInfo
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Abstract
The invention discloses a method for constructing a composite ecosystem for restoring eutrophic water and an artificial reef. The artificial reef comprises a hollow artificial reef made of volcanic rock, wherein gel containing the bottom end of a plant root diameter is filled in the hollow artificial reef, and a solidified layer of sodium alginate gel solution is coated on the surface of the artificial reef. The hollow artificial reef is preferably conical, and the conical tip is inserted into the sediment. The composite ecological system is simple to construct and operate, short in period, low in cost and strong in applicability, can keep a water body clear and bottom for a long time, and has certain kitchen garbage treatment capacity and ecological loach breeding capacity with high nutritive value.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to a composite ecosystem construction method for restoring eutrophic water and an artificial reef, belonging to the technical field of environmental protection.
[ background of the invention ]
The eutrophication of water body refers to the phenomenon that under the influence of human activities, the enrichment of nitrogen and phosphorus nutrient substances in the water body causes the rapid propagation of algae and other plankton, the reduction of the dissolved oxygen amount of the water body, the mass death of fishes and other organisms and the deterioration of water quality. Since the 80 th century in China, due to rapid economic development and relative lag in environmental protection, many lakes and reservoirs have entered eutrophication, even severe eutrophication states, such as Dian lake, Taihu lake, West lake, Dong lake, south lake, basalt lake, Bohai Bay, Lai Bay, Jiulongjiang, Huangpu river, and the like. The water quality conditions of 62 key lakes in China were investigated in 2014, and the polluted lakes account for 38.7 percent, wherein the main freshwater lakes such as Taihu lake, nested lake and Dian lake in China all reach the eutrophication level. In recent 20 years, the eutrophication of lakes has developed seriously, and the eutrophic lakes in China are mainly distributed in mid-downstream lake areas of Yangtze river, Yuniu lake areas, and parts of northeast mountainous areas and plain lake areas and Mongolian lake areas. The main freshwater lakes basically reach the standard for eutrophication except for the regions with little human smoke and the portions of lakes in the original state. With the rapid development of economy, the rapid growth of population and the acceleration of industrialization and urbanization processes, the discharge amount of nitrogen and phosphorus nutrients to water is increasing, the eutrophication of water is aggravated, the quantity and the area of eutrophication lakes are in the forefront of the world, and the eutrophication of lakes becomes one of the most important social and environmental problems seriously threatening the water resource and water safety in China. The serious water pollution and the deterioration of the water environment quality aggravate the water resource crisis and influence the life of people and the economic development speed of China. Therefore, the protection of water resources, the prevention and control of water body pollution and the restoration of eutrophicated water bodies are important directions for the environmental protection work of China and even the world at present.
The artificial seed coating technology is to embed somatic embryo produced in the isolated culture of plant or meristem (bud, callus, embryoid, etc.) capable of developing into complete plant in the shell containing nutrient and with protecting function to form granule capable of germinating and emerging under proper condition. In 1981, Lawrence et al have more and more reports on artificial seeds after researching the liquid gel embedding belt technology for wrapping celery leyi and madder bascule cells. In 1987, China began to bring artificial seeds into the national high-tech development program (863 program), and researches on artificial seeds of some economic crops such as rubber trees and some special fruit trees in the south of China. According to the research (2011) of Wangmangxia and the like, the result shows that the germination rate of the pinellia ternate artificial seeds prepared from an MS liquid culture medium, sodium alginate (3%) + activated carbon (0.5%) + carbendazim (0.3%) + sodium benzoate (0.2%) + chitosan (0.05%) +6-BA (0.5mg/L) + NAA (1mg/L) is the highest and reaches 80%; according to the research of anjie et al (2009), the germination rate of potamogeton crispus artificial seeds made of sodium alginate, MS, cane sugar, IBA 1.0mg/L and 6-BA 0.5mg/L in sterilized tap water can be up to 80%, and its plant-transferring rate can be up to 20%. Research and application at home and abroad show that the artificial seeds have the advantages of high propagation speed, short production period, industrialized large-scale preparation, storage, rapid popularization, no seasonal limitation on production and the like compared with natural seeds. At present, the research scope of artificial seeds mainly focuses on some important food crops and economic crops, medicinal plants, ornamental plants and the like, but the application of the artificial seeds in submerged plants is less.
The eutrophic water body restoration technology has been developed for several years, and the lake water body restoration technology adopted at home and abroad at present can be divided into a physical method, a chemical method and a biological/ecological method.
The physical method mainly comprises the steps of sediment dredging, water diversion and water change, sewage interception, flow-making aeration, mechanical algae removal and the like.
The sediment dredging means that the polluted sediment is removed from the water body, and the method can greatly reduce the pollution contribution rate of the sediment to the overlying water body, thereby improving the water quality. In many cases, sediment dredging is a necessary measure, and the method has quick and good effect. For example, Trummen lake and Dian Chi grass sea in Sweden have obviously improved water quality after the implementation of dredging engineering. However, there are some controversies about the effect of dredging, and basalt lake of Nanjing and Suwa lake of Japan are examples of failure of dredging. The environmental effects of dredging sediment are related to the dredging method, which may have a negative impact on ecological remediation. In addition, dredging and dredging the bottom mud is expensive, has great damage to the ecology of the water body, is difficult to dispose the removed sludge, and is easy to cause secondary pollution. The sediment dredging can only be used as an auxiliary means for lake water body restoration.
The water diversion and water change is to inject an external clean water source into the lake water body, so as to play a role in diluting water body pollutants, reducing the concentration of nutritive salt, reducing the growth of algae and playing a certain role in improving the transparency of the water body. However, the method has high requirements on the quality and quantity of water of a water replenishing source and high cost for large-flow water regulation.
The sewage interception is to collect the sewage which is directly discharged into the lake originally into a sewage plant for treatment and then discharge the sewage. Sewage interception is the reduction of the total amount of pollutants discharged into the water body of a received lake. One consensus of environmental governance is that source governance is the most important, process governance is the next to process governance, and finally terminal governance. The sewage interception is the source treatment and is the precondition for treating the lake water pollution. But the sewage interception method can not eliminate pollution sources such as endogenous pollution, dry and wet sedimentation and the like; most of the water replenishing sources of lakes are rivers or rains, and sewage interception cannot reduce pollutants from the water replenishing sources. The polluted water body is difficult to recover the water quality function only by sewage interception.
The aeration is carried out by adopting methods of mechanical stirring, compressed air, a water pump, an injection pump and the like, so that the dissolved oxygen concentration of the water body is improved, the outbreak of algae in the water body is inhibited, the self-cleaning capacity of the water body is enhanced, and the polluted water body can be effectively repaired. However, the aeration method has the problems of high investment cost, difficult installation and maintenance, high operation cost and the like, and is not suitable for long-term application.
The mechanical algae removal is a mode for removing algae from a water body, is generally applied to a blue algae enrichment area, and adopts a fixed algae removal facility and an algae removal ship to carry out circulating treatment on lake water in the area so as to effectively remove a floating algae layer. Can directly remove a large amount of lake surface cyanobacterial bloom and can be used as an emergency measure when the cyanobacterial bloom is in large-area outbreak. But the mechanical algae removal speed is far faster than the growth speed of algae, the removal efficiency is low, the cost is high, the effect is weak, and the problems of lake water eutrophication and water landscape cannot be fundamentally solved. In addition, the disposal of the fished algae is also a difficult problem.
Chemical precipitation promotes the sedimentation of pollutants in lake water by adding a chemical coagulating agent, improves the transparency of a water body, inhibits the release of phosphorus in sediments and improves the water quality. But the chemical agent not only has high cost and short effect duration, but also easily causes secondary pollution. The addition of chemical agents is only suitable for emergency treatment.
The chemical algae removal method is an effective algae removal method with simple process and convenient operation, and algae in the lake water body is removed by spraying algaecide. However, the chemical algaecide also causes secondary pollution while inhibiting algae, and has toxicity to other aquatic organisms. The chemical algaecide does not fundamentally solve the problem of water eutrophication, and once the algae is stopped, the chemical algaecide can erupt, and the chemical algaecide method can only be used for emergency treatment.
The biological/ecological restoration method is a technology for transferring, converting and degrading pollutants in lake water by utilizing the life activities of cultivated plants or cultivated and inoculated microorganisms so as to purify the water body. The biological/ecological water body restoration technology commonly used for lake water body restoration comprises a microorganism strengthening method, a biological carrier method, an aquatic plant method, a biological control method, an artificial wetland and the like.
The microorganism strengthening method is characterized in that repair strains cultured by artificial breeding or genetic engineering are added into the lake water body, and nitrogen and phosphorus nutrient elements and organic pollutants in the water body are quickly removed by the high-efficiency strains. The technology has simple operation and convenient management, and can quickly improve the water quality. However, because the water body lacks of the attachment matrix of the microorganisms, the added microorganisms are often lost along with the water flow, and the microorganisms are continuously added to keep a good repairing effect, so that the repairing cost is high.
The biological carrier method is characterized in that natural materials (such as pebbles) and synthetic materials (such as fibers) are used as carriers, a special biological membrane is formed on the surface of the carriers, the surface area of the biological membrane is large, a large attachment area can be provided for microorganisms, the degradation effect on pollutants is enhanced, and the self-cleaning capacity of the lake water body is improved. However, the current bio-vector method has the following problems: 1) influence the water landscape of the lake; 2) certain influence is caused to the structure and the use function of the water area ecological system in the application process, for example, the carrier used in the polluted water body can influence the functions of water storage, flood discharge and the like of a lake; 3) the cost of the biofilm technology is high in the aspects of capital construction and operation.
The aquatic plant method is to utilize aquatic plant and its symbiotic microbe to absorb and decompose pollutant to purify water. The aquatic plant can also change the material exchange balance between the lake water and the bottom sediment, promote the transfer of the suspended or dissolved pollutants in the water to the bottom sediment, and clarify and purify the water quality. Plants can also form a nutritional competition with planktonic algae, inhibiting algal outbreaks. According to research reports, the ficus microcarpa, vetiver grass, cress, water spinach, lolium multiflorum and the like which are made into the floating bed have obvious effects on removing the water N, P and inhibiting the breeding of algae. The nitrogen and the phosphorus in the water body are removed by harvesting the aquatic plants. The aquatic plant method has low investment cost, can promote the development of an aquatic ecosystem and improve the landscape effect of the water body. However, the workload of aquatic plant management is large, secondary pollution is easily caused when the aquatic plant is not managed in place, and excessive aquatic plants can block the water surface to shield sunlight and influence underwater vegetation and organisms.
Biological manipulation theories can be divided into classical and non-classical biological manipulation theories. The classical biological manipulation theory is that the quantity of zooplankton is increased and the composition types are enlarged by artificially removing filter-feeding fishes or increasing the quantity of carnivorous fishes in lakes, so that the feeding efficiency of the zooplankton to phytoplankton is improved, and the quantity of the phytoplankton is reduced; a non-classical biological manipulation theory is the direct control of phytoplankton numbers by stocking filter-feeding fish. Experiments show that the water bloom of microcystis and blue-green algae is effectively controlled by stocking silver carps, bighead carps and the like, and the transparency of the water body is improved. However, due to the existence of some complex factors, the phenomena of increased phytoplankton quantity, anoxic water body, aquatic organism death and the like often occur in the test. The biological manipulation theory is controversial, and the application of the biological manipulation theory to actual water body remediation is not practical.
The artificial wetland generally consists of artificial substrate (mostly broken stones) and aquatic plants (such as reed, cyperus malaccensis and the like) growing on the artificial substrate, and is a unique 'soil-plant-microorganism' ecological system. The wet ground is utilized to carry out physical adsorption, filtration, microbial degradation and plant absorption on pollutants, and the wastewater can be effectively and reliably treated. The buffer effect on hydraulic power and pollution load can provide direct or indirect benefits, such as; greening, wildlife inhabitation, entertainment, education and the like. The artificial wetland has low construction and operation cost and is more applied to sewage treatment and landscape water body restoration. The biggest problem of the artificial wetland is blockage, and the American environmental protection agency finds that nearly 50 percent of artificial wetland systems in operation are blocked to different degrees after being put into use for 5 years through the artificial wetland investigation. The plants in the artificial wetland must be harvested on time, otherwise, secondary pollution is easily caused. The maintenance cost of the artificial wetland is greatly increased by the replacement of the filler and the management of the plants.
Therefore, the problems existing in the existing eutrophic water body restoration are as follows:
1) high cost and great influence on environment. Such as chemical remediation, sediment dredging and the like, easily generate secondary pollution and damage lake ecosystems.
2) The repairing effect is difficult to continue. Although the microbiological method and the chemical method can quickly improve the water quality, the self-purification capability of the lake water body cannot be substantially improved, the restoration effect cannot be sustained, and when pollutants enter the water body, the water environment is damaged.
[ summary of the invention ]
The invention aims to overcome the defects of the prior art and provides a construction method of a composite ecosystem for restoring eutrophic water, which has complete structure and function and can maintain the internal stability of the system through self regulation.
Another object of the present invention is to provide an artificial reef for constructing the above composite ecosystem.
The invention is realized by the following technical scheme:
a method for constructing a composite ecosystem for restoring eutrophic water is characterized by comprising the following steps:
a. inserting the tip of the artificial reef with the submerged plant into the sediment of the water body;
b. after the submerged plants are stable in growth, putting algae-cleaning organisms into the water body after proper oxygen exposure, putting biological compound bacteria after the algae-cleaning organism population is stable, and maintaining properly until the system is complete.
The conical artificial reef is a conical hollow artificial reef and is made of volcanic rock, and the submerged plant is coated and solidified in the hollow artificial reef by sodium alginate gel.
The submerged plant is placed into the conical hollow artificial reef in the form of gel containing the bottom end of the plant rhizome, and the gel containing the bottom end of the plant rhizome is prepared by mixing kitchen waste liquid, 5-8 wt% of EM composite bacterial liquid, 3-6 wt% of sodium alginate and 375-85mg/l of GA. The submerged plant is preferably herba Swertiae Dilutae.
Preparing a gel comprising the rhizomes of the plant at the bottom end by:
taking bitter grass seedlings, cleaning, cutting off long roots of the plants, leaving a little roots of the rest plants, washing with distilled water, and mixing with kitchen waste liquid, 5-8 wt% of EM composite bacterial liquid, 3-6 wt% of sodium alginate and 375-85mg/l of GA (the total amount of the kitchen waste liquid, the EM composite bacterial liquid and the sodium alginate is 100%, and the GA3 is added according to the volume) to prepare the gel containing the bottom ends of the plant roots and stems.
The algae-removing organisms in the invention are loaches and/or filter feeding fishes, and the throwing density is 40-60g/m2The filter feeding fish is Aristichthys nobilis or Hypophthal Michthys.
The biological compound bacteria put in the invention consists of photosynthetic bacteria, rhodopseudomonas palustris, bacillus licheniformis and pseudomonas stutzeri, and the input density is 20-30g/m3。
The proper oxygen exposure in the invention means that the DO concentration of the water body reaches 5mg/L, the proper maintenance means that the dead leaves of the submerged plants are fished, and the system integrity means that a complete ecosystem constructed by producers, consumers, decomposers and inorganic environment is completed.
The invention relates to an artificial reef for a composite ecosystem for repairing a eutrophic water body, which comprises a hollow artificial reef made of volcanic rock, wherein gel containing the bottom end of a plant root diameter is filled in the hollow artificial reef, and a solidified layer of sodium alginate gel solution is coated on the surface of the artificial reef. The hollow artificial reef is preferably conical, and the conical tip is inserted into the sediment.
Compared with the prior art, the invention has the following advantages:
the invention adds producers (eel grass), consumers (fish, shrimp, loach, etc.) and decomposers (complex bacteria) into the water body to form a complete biological community, and then constructs a complete artificial simulation ecosystem together with non-biological substances and energy. The ecological system constructed by the invention can maintain the internal stability of the system through self regulation in a normal state for a long time, and producers can utilize sunlight and nutrients in water to grow and develop and transfer the nutrients in the water into plants to realize water purification.
The composite ecological system is simple to construct and operate, short in period, low in cost and strong in applicability, can keep a water body clear and bottom for a long time, and has certain kitchen garbage treatment capacity and ecological loach breeding capacity with high nutritive value.
[ description of the drawings ]
FIG. 1 is a graph showing the change in total phosphorus concentration in example 1 of the present invention;
FIG. 2 is a graph showing the change in the ammonia nitrogen concentration in example 1 of the present invention;
FIG. 3 is a graph showing the change in total phosphorus removal rate in example 2 of the present invention;
FIG. 4 is a graph showing the change in ammonia nitrogen removal rate in example 2 of the present invention.
[ detailed description ] embodiments
The invention will be further illustrated with reference to specific embodiments:
a composite ecosystem construction method for restoring eutrophic water bodies specifically comprises the following steps:
a. inserting the tip of the artificial reef coated with the submerged plant into the water body sediment, wherein the input density of the submerged plant is 600-2；
b. After the submerged plants grow stably, when the DO concentration of the water body reaches 5mg/L by proper aeration, the biomass density is put into the water body and is 40-60g/m2The algae-cleaning organisms are added with biological compound bacteria after the algae-cleaning organism population is stable, and the adding density is 20-30g/m3And proper maintenance is carried out, and the system to be produced, the consumer, the decomposer and the inorganic environment are complete.
In fact, the amount of the submerged plants, the algae-removing organisms and the biological compound bacteria can be properly adjusted according to the eutrophication degree of the water body and the speed of the restoration, and the healthy circulation of the whole ecological system is ensured firstly.
The kitchen waste fermentation liquid is coated into the plant root system, so that the kitchen waste fermentation liquid not only can provide a direction for the treatment of the kitchen waste, but also can provide nutritional requirements for the growth of submerged plants.
The invention applies the conical artificial reef to ecological system restoration, and solves the problem of planting submerged plants underwater in ecological restoration engineering. Meanwhile, the artificial reef can also provide an environment for laying eggs and growing for the growth of benthonic organisms and fishes, and enrich the biological diversity of the underwater ecosystem.
According to the loach predatory aquatic higher plant debris and algae, the feeding property of the water bottom detritus and the algae and the feeding property of the loach predatory aquatic higher plant debris and algae and the mud residue are utilized, the planktonic algae in the water body are reduced, the transparency of the water body is improved, the loach has a special intestinal respiration function besides being breathed by gills and skins, can live in the water body with low dissolved oxygen, has strong applicability and can be applied to water body restoration with different pollution degrees, meanwhile, the loach likes to grow in silt, the disturbance on the sediment further releases nutrients in the sediment, and the nutrient content of the sediment is reduced.
The added biological compound bacteria can simultaneously remove organic matters, nitrogen and phosphorus in the water body and can effectively inhibit the growth of harmful algae, so that the chlorophyll a of the water body is reduced, the transparency of the water body is improved, meanwhile, the compound bacteria provide natural bait for zooplankton, the growth of the zooplankton is promoted, the zooplankton eats the plankton, the growth of the algae is further inhibited, meanwhile, the zooplankton is the bait for loaches and fishes, a complete food chain is formed, and the integrity of an ecological system is reflected.
Example 1:
the experimental fish tank: after the fish tank is cleaned by boiling water, lake sediment or fine sand with the height of 7cm is paved at the bottom of the fish tank.
The construction method of the composite ecosystem comprises the following steps:
a. preparing submerged plants: cleaning the seedlings of the tape grass, cutting off the long roots of the plants, leaving a little roots of the rest plants, washing the seedlings with distilled water, and mixing the seedlings with crushed kitchen garbage, 5% EM compound bacterial liquid, 3% sodium alginate and 75mg/L GA3 to prepare gel containing the bottom ends of the roots and stems of the tape grass;
b. putting the gel containing the bottom end of the bitter grass rhizome into a hollow conical artificial reef made of volcanic rock, putting the conical artificial reef into 2 wt% calcium chloride solution for curing reaction, and stopping the reaction after curing to obtain a bitter grass reef body;
c. inserting the tip of the tapered eel rock body into the bottom mud; the density is 800g/m2Adding a diluted lake water sample, wherein the initial concentration of total phosphorus is 0.5mg/L, and the initial concentration of ammonia nitrogen is 5 mg/L;
d. after the submerged plants grow stably, aerating properly to ensure that the DO concentration of the water body reaches 5mg/L, and adding the biomass with the density of 50g/m2When the fish population is stable, namely large-area death does not occur, the loach and the bighead carp are added with the composite bacteria mainly comprising photosynthetic bacteria, rhodopseudomonas palustris, bacillus licheniformis and pseudomonas stutzeri, wherein the adding density is 25g/m3And (4) properly maintaining, and fishing out dead leaves of the submerged plants to finish a complete ecosystem constructed by producers, consumers, decomposers and inorganic environment.
After the ecosystem of example 1 was constructed, water quality was measured every four days for an experimental period of 15 days with five replicates. As shown in FIG. 1, the total phosphorus concentration in the eutrophic water body is reduced to below 0.15mg/L, showing a significant reduction trend and a good restoration effect, and as shown in FIG. 2, the ammonia nitrogen concentration in the eutrophic water body is reduced to below 0.8mg/L, showing a significant reduction trend and a good restoration effect.
Example 2:
field test site: about 1.5m deep, 15m area2The initial concentration of total phosphorus is 1mg/L and the initial concentration of ammonia nitrogen is 5mg/L
a. Preparing submerged plants: cleaning the seedlings of the tape grass, cutting off the long roots of the plants, leaving a little roots of the rest plants, washing the seedlings with distilled water, and mixing the seedlings with crushed kitchen garbage, 5% EM compound bacterial liquid, 3% sodium alginate and 75mg/L GA3 to prepare gel containing the bottom ends of the roots and stems of the tape grass;
b. putting the gel containing the bottom end of the eel grass rhizome into a hollow conical artificial reef made of volcanic rock, putting the conical artificial reef into 2 wt% calcium chloride solution for curing reaction, and stopping the reaction after curing to obtain an eel grass body;
c. inserting the tip of the conical eel stone body of the tape grass into the sediment of the water body, wherein the density of the tape grass is 600-800g/m2；
d. After the submerged plants grow stably, aerating properly to ensure that the DO concentration of the water body reaches 5mg/L, and adding the biomass with the density of 40-60g/m2When the fish population is stable, namely large-area death does not occur, the loach and the bighead carp are added with the composite bacteria mainly comprising photosynthetic bacteria, rhodopseudomonas palustris, bacillus licheniformis and pseudomonas stutzeri, wherein the adding density is 20-30g/m3And (4) properly maintaining, and fishing out dead leaves of the submerged plants to finish a complete ecosystem constructed by producers, consumers, decomposers and inorganic environment.
After the ecosystem of the embodiment 2 is constructed, water samples are collected every 3 days to monitor the total phosphorus and ammonia nitrogen concentration in the water body, and the experimental period is 15 days. The results are shown in fig. 3 and 4, the concentrations of total phosphorus and ammonia nitrogen in the eutrophic water body are in a significant decline trend, a better repairing effect is shown, the removal rate is more than 80%, the total phosphorus concentration in the pond water body is reduced to be less than 0.1mg/L, and the ammonia nitrogen concentration is reduced to be less than 1 mg/L.
The ecological system constructed by the invention can be used for restoring eutrophic shallow lake rivers, bioremediation oxidation ponds and small-sized shallow lakes of urban landscapes. The method can guide the initial planting density of 600-800g/m in the actual ecological restoration project2The submerged plant can realize operation with water, greatly reduces the construction cost and improves the repair efficiency.
However, the system has a certain limitation, and the system is not suitable for being applied to a deeper water body due to the influence of illumination on the growth of the submerged plants.
Claims (8)
1. A method for constructing a composite ecosystem for restoring eutrophic water is characterized by comprising the following steps:
a. inserting the tip of the artificial reef with the submerged plant into the sediment of the water body;
b. after the submerged plants are stable in growth and properly aerated, putting algae-cleaning organisms into the water body, after the algae-cleaning organism population is stable, putting biological compound bacteria, and properly maintaining until the system is complete;
the artificial reef is a conical hollow artificial reef and is made of volcanic rock, and the submerged plant is coated and solidified in the hollow artificial reef by sodium alginate gel.
2. The method as claimed in claim 1, wherein the submerged plant is placed in the form of gel containing the bottom end of the plant's rhizomes in the hollow conical artificial reef.
3. The method for constructing a composite ecosystem for remediating eutrophic water body according to claim 2, wherein the gel containing the bottom end of the plant rhizome is prepared by mixing kitchen waste liquid, 5-8 wt% of EM composite bacterial liquid, 3-6 wt% of sodium alginate and 375-85mg/l of GA.
4. The method according to claim 1, wherein the submerged plant is tape grass.
5. The method according to claim 1, wherein the algae-removing organisms include loach and/or filter-feeding fish, and the biomass density is 40-60g/m2。
6. The method of claim 1, wherein the biological complex bacteria comprise photosynthetic bacteria, Rhodopseudomonas palustris, Bacillus licheniformis and Pseudomonas stutzeri, and the input density is 20-30g/m3。
7. The method for constructing a complex ecosystem for remediating an eutrophic water body according to claim 1, wherein the oxygen aeration means that the DO concentration of the water body reaches 5 mg/L.
8. The artificial reef for the composite ecosystem for restoring the eutrophic water body is characterized by comprising a hollow conical artificial reef made of volcanic rock, wherein gel containing the bottom end of plant roots and stems is filled in the hollow part of the artificial reef, and a solidified layer of sodium alginate gel is coated on the surface of the artificial reef.
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| CN112811712B (en) * | 2020-12-15 | 2022-12-13 | 江苏省环境工程技术有限公司 | Method for restoring composite polluted soil, water body or bottom mud by using aquatic organisms |
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| CN106242064A (en) * | 2016-08-31 | 2016-12-21 | 广州市水务科学研究所 | A kind of high water-base fluid man-made lake Lakeside Zone ecological restoring method |
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| CN102172154A (en) * | 2011-02-25 | 2011-09-07 | 北京市水利科学研究所 | Method for culturing submerged plant seeds |
| CN104030458A (en) * | 2014-05-21 | 2014-09-10 | 东莞市华中生物科技有限公司 | Turbidity-reducing and algae-inhibiting method |
| CN105417709A (en) * | 2015-10-24 | 2016-03-23 | 宁波清泉水生态科技有限公司 | Construction method for water body self-cleaning ecological chain |
| CN106242064A (en) * | 2016-08-31 | 2016-12-21 | 广州市水务科学研究所 | A kind of high water-base fluid man-made lake Lakeside Zone ecological restoring method |
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