CN106365331A - Treatment method of riverway water body pollution and device and application thereof - Google Patents

Abstract

The invention provides a river channel water pollution control method and its device and application. The method comprises: digestion of river channel sediment, an integrated microorganism activation device, and river channel water body oxygenation. Among them, microbial compound preparations need to be added to the digestion of river sediments, including: high-efficiency microbial preparations (microbial content: 1×10 ⁶ /mL) (dosing amount: 10-20g/m ³ sludge), microbial growth promoters ( Dosage: 0.2-0.5g/m ³ sludge) and auxiliary agent (dosage: 2-5mg/m ³ sludge) mixture preparation. Restore and improve the damaged urban river ecosystem through a series of means. Through the restoration of the river ecosystem, various organisms in the system will coexist, the biodiversity will increase, the ability to resist external interference will be enhanced, and the system will be able to maintain a stable and continuous state. . Create a beautiful living environment to meet the needs of ecological civilization construction.

Description

A treatment method for river water pollution and its device and application

technical field

The invention belongs to the technical field of environmental protection. The invention relates to physical, chemical and biological restoration technologies in the field of river course governance and wetland restoration, and a comprehensive treatment method for river course water bodies integrating multiple treatment technologies.

Background technique

With the rapid development of society and economy, the population has grown rapidly, the discharge of pollutants has increased significantly, environmental protection has lagged behind, and the level of governance has not kept up with the high economic development, resulting in a large number of pollutants entering the water body with sewage, garbage, precipitation and runoff, resulting in The quality of the environment has deteriorated. Runoff pollutants are directly discharged into rivers without treatment, causing serious pollution to water bodies. Especially in cities, in order to meet the needs of flood discharge, river reconstruction is only considered from an engineering point of view, the river is cut and straightened, and the three sides of the river are solidified with cement and steel. The environment in which organisms live disappears, and their ecological functions and net capacity also degrade, which directly leads to the disappearance of a large number of organisms in the river. The high-load pollution discharge easily collapses the internal ecosystem of the river water body, and the flood discharge function is basically lost due to serious siltation. There is no ideal treatment method for this kind of problem at present. Most of the methods involve dredging treatment, the investment cost is relatively large, and the practical problem cannot be solved fundamentally.

How to restore the original ecological structure of the river and create a good living environment, people have carried out a lot of work. For such problems, most of the methods involve dredging and treatment, the investment cost is relatively large, and they cannot fundamentally solve practical problems. Based on This paper proposes an integrated technology for bioremediation of river water. The ecological restoration technology is the most promising restoration technology in recent years. This technology takes ecological thinking as the core guidance, regards the river as a complete ecological system during restoration, and all measures focus on the restoration and improvement of the water ecosystem. The method has the advantages of low cost, good effect and no secondary pollution. However, river governance is a systematic project, especially the complexity of urban rivers determines that a single technology is difficult to achieve the desired effect, and other technical support should be used to better integrate them and play their roles together , of course, the premise is to take ecology as the core guiding ideology.

Contents of the invention

The purpose of the present invention is to provide a method for ecological restoration of urban rivers, restore and improve the damaged urban river ecosystems through a series of means, through the restoration of river ecosystems, various organisms in the system can coexist, and the biodiversity increases. The ability to resist external interference is enhanced, and the system can maintain a stable and continuous state. Create a beautiful living environment to meet the needs of ecological civilization construction.

To achieve the above object, the present invention discloses the following technical contents:

A treatment method for river water pollution, characterized in that it proceeds in the following steps:

(1) Digestion of river sediment:

Sprinkle the microbial composite preparation directly into the river water body, the microbial composite preparation naturally settles into the bottom mud, and performs bioremediation on the bottom mud of the river channel water body; the microbial composite preparation has a limited composition:

The content of microbial preparation is as little as 1×10 ⁶ /mL; the dosage is: 10-20g/m ³ sludge

The dosage of microbial growth promoter is: 0.2-0.5g/ ^m3 sludge

The dosage of auxiliary agent is: 2-5mg/ ^m3 sludge;

The microbial bacterial preparation refers to: a powdery bacterial preparation composed of Bacillus, Paracoccus, flocculating bacteria and photosynthetic bacteria; wherein the weight ratio of Bacillus: Paracoccus: flocculating bacteria and photosynthetic bacteria is 5:3:2:1;

Microbial growth promoter BE extracted from "weathered lignite" in southwest Idaho, USA;

Auxiliary agent: refers to a mixture containing a trace amount of ferric salt and a small molecule carbon source substance, wherein the mass ratio of a trace amount of ferric salt to a small molecule carbon source substance is 1:100, and the trace amount of ferric Salt refers to iron sulfate; small molecule carbon source refers to sodium acetate;

(2) Oxygenation device:

On the second bank of the river, set up a submersible pump 2km away from the upstream of the river, and lay a pipeline 1.5km upstream along the second bank of the river, lift the river water and then discharge it evenly through the water distribution pipeline 500m upstream, and then circulate the water between 1.5km ; Increase the dissolved oxygen in the water body of the 1.5km section, and the dissolved oxygen concentration in the river 4.5km downstream can still be maintained at 1~3mg/L;

(3) Integrated microbial activation device:

The microbial preparation is activated by the integrated microbial activation device. Aeration tubes and microporous aeration discs are arranged at the bottom of the box of the device to aerate the micropores to increase oxygen for microorganisms. The top of the box is 0.5m and the bottom of the box is 0.3m. Correspondingly set up a horizontal bar, which is connected with a non-woven bag every 0.4m, evenly arranged in the box, the diameter of the bag is 15cm, and contains microbial preparations + microbial growth promoters, and the lower end of one side of the box is connected to the water pump. Use the lifting pump to lift the river water from the middle of the river into the movable microbial activation device, connect the other end 0.3m from the top of the box to the drain pipe, and discharge the effluent into the river. The residence time of the river wastewater is set to 10-12h;

(4) Dosing microbial preparations and microbial growth promoters:

The non-woven bag contains microbial preparations and microbial growth promoters, and the dosages of the two are 0.5-1g/m ³ and 0.2-0.5mg/m ³ respectively in water for 5 months. Placed in a non-woven bag;

When a river water emergency occurs, in addition to using the integrated microbial activation device to slowly release microbial bacteria, microbial preparations and growth promoters can be directly added to the river, and the dosage is 5-10g/ m ³ , 2-5mg/m ³ , add 10 times the normal dosage.

The present invention further discloses a treatment system for river water pollution, which includes an integrated microbial activation device installed on the second bank of the river, an equipment room, a pump well, and a pipeline for transporting water, wherein:

The pump well is designed in the center of the river 1.5km downstream of the seriously polluted river section, and there are two lift pumps, grids, rams and lifting devices inside. The grid is placed in the pump well, the lift pump is placed in the grid, and the grid lifts To intercept debris in the river to avoid blocking the lift pump; there is a ram connected to the grid, and the lift pump will be lifted away from the pump well after the ram is opened, and the lifting device will lift the lift pump away from the pump well for easy maintenance;

The equipment room is located next to the pump well on both sides of the river bank, and has a lift pump power supply system and an automatic control system for the lift pump inside;

The integrated microbial activation device is respectively designed at 1.5km upstream of the pump well in the river, and the integrated microbial activation device is connected with the lifting pump in the pump well through a pipeline; the integrated microbial activation device includes: a box, an aeration Tubes, microporous aeration discs, cross bars, non-woven bags, water pumps, and drainage pipes; the bottom of the box is equipped with aeration tube 1 and microporous aeration discs 2, and the microporous aeration discs are used to increase oxygen for microorganisms. Corresponding to the top 0.5m and the bottom 0.3m of the box, a crossbar 3 is set, and a non-woven bag 4 is connected to the crossbar every 0.4m, and is evenly arranged in the box. The diameter of the bag is 15cm, and it contains microbial preparations + microorganisms For the growth promoter, the lower end of one side of the box body is provided with a water inlet pipe 5, and the other end 0.3m away from the top of the box body is connected with a drain pipe 6 to discharge the water into the river. The system on the second bank of the river is only responsible for the treatment of the 5km river and the maintenance of the water quality of the river. When the river is longer than 5km, the pollution status of the river and the length of the river can be tested, and the second bank can increase or decrease the entire set of equipment systems.

The invention further discloses the application of the river channel water body pollution control method in the aspect of removing various pollutants in water and purifying water quality. Experimental results show that the treatment method of the present invention can effectively remove pollutants in the water, improve the self-purification ability of the water body, restore the original ecological balance of the water body, and fundamentally improve the water body environment.

The present invention is described in more detail as follows:

(1) Digestion of river sediment:

Dosing sediment microbial composite preparations in the river, the microbial composite preparation directly acts on the river water body to perform microbial oxidation on the river water sediment, decomposes organic pollutants in the sediment, and digests the river water sediment. Reduce the release of pollutants from the sediment of the river water body to the water body; it can convert the pollutants into "food" for microorganisms and other organisms on the spot, including nutrient-rich substances in the sediment of the river water body. Since it is biological desilting, there is basically no need for dredging, thus forming a change from the traditional "transfer and confrontation" to "harmony and utilization", which is called the restoration of the entire ecosystem.

The microbial compound preparation includes: high-efficiency microbial preparation (microbial content: 1×10 ⁶ /mL) (dosage: 10-20g/ ^m3 sludge), microbial growth promoter (dosage: 0.2-0.5g /m ³ sludge) and auxiliary agent (dosage: 2-5mg/m ³ sludge) mixture preparation.

Microbial preparations refer to powdery bacterial preparations composed of Bacillus, Paracoccus, and photosynthetic bacteria; the weight ratio of Bacillus: Paracoccus: flocculating bacteria and photosynthetic bacteria is 5:3:2:1 (Tianjin Environmental Protection Science The research institute can provide it to the outside world free of charge, see the patent for the specific effect on the river course), see the patent for a constructed wetland structure, patent number: ZL201420683272.1), and see the patent for the specific production process (a kind of artificial wetland structure used in the restoration of rivers, lakes and wetlands Multi-channel high-efficiency biological filler patent number: (201410647541.3), the bacterial preparation has dephosphorization and nitrogen removal microorganisms Paracoccus, and has microorganisms such as Bacillus for removing organic pollutants in water bodies. The dosage is: 10-20g/m ³ sludge;

Microbial Growth Enhancer (abbreviated as BE) is a cutting-edge scientific formula that integrates organic acids, buffers, enzymes, nutrients and energy. Rapidly grow in large quantities in a poor environment to form good bacteria micelles, thereby improving the efficiency of microorganisms in degrading organic pollutants and improving the effect of wastewater treatment. At the same time, BE can also increase the diversity of microbial species. By extending the food chain and improving the cycle efficiency of the food chain, a variety of microorganisms can work together more effectively, degrade pollutants more thoroughly, and improve the system's ability to withstand load shocks. The dosage is: 0.2-0.5g/ ^m3 sludge;

Auxiliary agent: mainly contains traces of ferric salt + small molecule carbon source substances (the mass ratio of the two is 1:100), the purpose is mainly to promote the growth of microorganisms and focus on the growth of nitrifying and denitrifying microorganisms. Dosage: 2-5mg/ ^m3 sludge.

(2) Integrated microbial activation technology:

High-efficiency microorganisms are activated through an integrated microbial activation device. Aeration tubes and microporous aeration discs are arranged at the bottom of the device's box to aerate through micropores to increase oxygen for microorganisms. The top 0.5m of the box and the bottom 0.3m of the box are equipped with crossbars correspondingly, and a non-woven bag is connected to the crossbar every 0.4m, which is evenly arranged in the box. The diameter of the bag is 15cm, and it contains high-efficiency microbial preparations Accelerator. The lower end of one side of the box is connected to the water pump, and the water body of the river is lifted from the middle of the river through the lifting pump to enter the movable microbial activation device. The other end 0.3m away from the top of the box is connected to the drain pipe to discharge the water into the river. The residence time of river wastewater was set at 30 minutes. The integrated microbial activation device provides a good oxygen-enriched environment for the growth of microorganisms, and the device can quickly promote the expansion and reproduction of beneficial microorganisms. The microorganisms multiply, and the value-added microorganisms enter the river with the flow of the water body, effectively removing the pollutants in the water. The integrated microbial activation device promotes high-efficiency microorganisms to form a biofilm on the surface of the filler. As the thickness of the biofilm increases, an anoxic, anaerobic, and aerobic biological internal environment is naturally formed, which affects the river water entering and leaving the integrated microbial activation device. to adsorption and filtration.

(3) Oxygenation of river channels:

Most river water bodies are in a state of static flow. Therefore, for river water bodies, the pollution is relatively light compared to the pollution. The dissolved oxygen in the river can be increased by circulating the water body of the submersible sewage pump. After the water body is treated by this technology, the contact area between water and air is increased. , improve the homogeneous mixing and mass transfer speed of gas and liquid, create a sufficient aerobic environment for the water body, create favorable conditions for the microorganisms in the river water body, and promote the reproduction and growth of the dominant bacterial species of the native microorganisms in the water body that are beneficial to the removal of pollutants, and continuously Continuously activate the local microorganisms in the water body to make them multiply continuously. The aerobic microorganisms multiply in large numbers, which is conducive to the removal of various pollutants in the water and is conducive to improving the ecological environment of the water body.

(4) Add high-efficiency microbial preparations and microbial growth promoters:

High-efficiency microbial preparations and microbial growth promoters can quickly and efficiently activate beneficial microorganisms in the environment, accelerate the formation of a food chain through the rapid reproduction of low-end microorganisms and quickly improve the growth environment of high-end organisms, greatly accelerating the effect of the "food chain". Use microbial degradation to remove organic pollutants in water.

Especially in the river channel sediment treatment technology in step (1), the microbial compound preparation is used to digest the river channel water body sediment, and the microbial compound preparation contains 10-20 g of high-efficiency microbial bacterial preparation (microbial content: 1×10 ⁶ /mL) /m ³ sludge, microbial growth promoter (0.2-0.5g/m ³ sludge) and auxiliary chemicals (2-5mg/m ³ sludge). Spray directly into the sediment of the river channel and the smelly water body, and carry out biological oxidation repair on the sediment of the river channel water body. The general digestion time is about 1 week.

In particular, the integrated microbial activation device in step (2) contains a non-woven bag. Usually, the bag contains microbial preparations and microbial growth promoters. The device contains aeration pipes to increase oxygen for microorganisms. Lifting the water body of the river from the middle of the river into the integrated microbial activation device, the integrated microbial activation device can quickly promote the amplification and reproduction of beneficial microorganisms. When the environment becomes harsh, microbial preparations and accelerators are added to the integrated microbial activation device. The integrated microbial activation device provides a good oxygen-enriched environment for the growth of microorganisms, making the microorganisms reproduce in large numbers, and the value-added microorganisms flow with the water body Into the river, effectively remove pollutants in the water. The integrated microbial activation device promotes high-efficiency microorganisms to form a biofilm on the surface of the filler. As the thickness of the biofilm increases, an anoxic, anaerobic, and aerobic biological internal environment is naturally formed, which affects the river water entering and leaving the integrated microbial activation device. to adsorption and filtration.

Especially in the river channel aeration technology in step (3), the water pump is lifted and the pipeline is laid, and the water body is circulated in the river channel through the lifting pump to increase the dissolved oxygen in the river channel. After the water body is treated by this technology, the contact area between water and air is increased. Improve the gas and liquid homogeneous mixing and mass transfer rate, so that the dissolved oxygen in the river can be maintained at 1-2 mg/l, and promote the establishment of a good microbial ecosystem in the sediment and the restoration and maintenance of the microbial ecosystem in the sediment and the river. The degradation and removal of water pollutants creates favorable conditions for river water microorganisms, which is conducive to improving the ecological environment of water bodies;

Especially in step (4), high-efficiency microbial preparations and microbial growth promoters are added. The microbial preparations are microbial preparations and high-efficiency microbial growth promoters that degrade organic pollutants efficiently. The concentration of the bacterial preparations is (0.5-1g/ m ³ ) and microbial growth promoters (0.2-0.5mg/ m ³ ), are generally added twice a year in March-April and August-September in river water treatment (except in emergency situations). When an emergency occurs in the water body of the river, in addition to using the integrated microbial activation device to slowly release the microbial bacteria, you can directly add high-efficiency microbial preparations and growth promoters in the river, and the dosage is 5-10g respectively /m ³ , 2-5mg/ m ³ , add 10 times the usual dosage.

The microbial preparation contains dephosphorizing and nitrogen-removing microorganisms, which can effectively remove nitrogen and phosphorus in the system by adding microbial preparations and microbial growth promoters, avoiding the outbreak of cyanobacteria caused by eutrophication, and has significant advantages in the removal of total nitrogen and ammonia nitrogen ;By adding microbial preparations and microbial growth promoters, beneficial bacteria gradually become the dominant flora, which enhances the biological activity of the system and improves the effective biomass and functionality of microorganisms;

At the same time, microorganisms can effectively degrade the organic matter in the sediment, reduce the release of nitrogen and phosphorus in the sediment to the water body, gradually reduce the volume and weight of the sediment, achieve the effect of biological dredging, and avoid the amount of manual or mechanical dredging Large, serious shortage of secondary pollution of the environment. This method is fast and efficient, and the effect lasts. It can eliminate black odor in one to two months, restore the ecology in three to six months, and restore the self-purification ability of the environment; the comprehensive cost is low, the operation is simple, and no dredging and civil works are required, which greatly reduces pollution control input; no secondary pollution to the ecological environment.

Especially the synergy and flexible operation of the two processes of steps (1) and (4), the specific coordination and operation methods are as follows:

a. During the treatment process, water circulation and flow measures are used to ensure sufficient dissolved oxygen levels in the river. However, in summer, the river pollution load is high and the dissolved oxygen consumption rate is fast (especially in July, August, and September). In order to prevent the lack of dissolved oxygen at the end of the treated river section from affecting the purification effect of the ecological management system, and the situation that the water quality at the front section may exceed the standard, the time to turn on the water pump is increased in a timely manner. In actual use, according to the dissolved oxygen content in the river water, when the dissolved oxygen level is high, the water pump can be selectively switched on and off.

b. The submersible pump for water intake adopts frequency conversion control, which can adjust the treated water volume according to the water quality of the river, so as to control the cycle time, and achieve the purpose of energy saving under the premise of ensuring the water quality.

C． The system can be adjusted according to the actual water pollution degree and water flow speed, and adopts intermittent operation mode. According to the on-site hydrological conditions, water quality testing data and operating experience, when the self-purification capacity of the water body is improved, the annual operating time and operating costs of the equipment will decrease.

The advantages and effects of the treatment method for river water pollution and its device and application disclosed in the present invention are:

(1) The invention is one-time use. After proper adjustment and improvement, the black and odorous water body, river course and wetland water system will run continuously, reducing the cost of human maintenance and repair. The restored water ecosystem has a certain ability to resist external interference. When it is polluted less than the tolerance threshold of the system, the system will automatically decompose the pollution and continue to operate. It has a certain ability to absorb and remove pollution, and will not produce any pollutants. ,Eco-friendly.

(2) In the present invention, the integrated microbial activation device is combined with supersaturated aeration to promote the growth of beneficial microorganisms in the water body, provide a good growth and enrichment environment for microorganisms, enhance the denitrification effect of the reactor, and effectively remove the nitrogen in the water. Pollutants, improve the self-purification ability of the water body, restore the original ecological balance of the water body, and fundamentally improve the water body environment.

Description of drawings:

Figure 1 is a schematic diagram of the structure of the integrated microbial activation device:

Fig. 2 is the flowchart of river course water pollution control method; Wherein:

1 is an aeration tube, 2 is a microporous aeration disc, 3 is a horizontal bar, 4 is a non-woven bag,

5 is the water inlet pipe, 6 is the drain pipe, and 7 is the free microorganism in the box;

8 is an integrated microorganism activation device; 9 is a water inlet pipeline;

10 is a lifting pump, and 11 is an outlet pipeline.

Specific implementation method

The present invention is described below through specific embodiments. Unless otherwise specified, the technical means used in the present invention are methods known to those skilled in the art. In addition, the embodiments should be considered as illustrative rather than limiting the scope of the invention, the spirit and scope of which is defined only by the claims. For those skilled in the art, on the premise of not departing from the spirit and scope of the present invention, various changes or modifications to the material components and dosage in these embodiments also belong to the protection scope of the present invention. The raw materials and reagents used in the present invention are commercially available. The microbial growth promoter is extracted from the "weathered lignite" in the southwest of Idaho, USA, and the market directly buys it under the name of microbial growth promoter BE.

Example 1

A treatment system for river water pollution, which includes an integrated microbial activation device installed on the second bank of the river, equipment rooms, pump wells and pipelines for transporting water, of which:

The pump well is designed in the center of the river 1.5km downstream of the seriously polluted river section, and there are two lift pumps, grids, rams and lifting devices inside. The grid is placed in the pump well, the lift pump is placed in the grid, and the grid lifts To intercept debris in the river to avoid blocking the lift pump; there is a ram connected to the grid, and the lift pump will be lifted away from the pump well after the ram is opened, and the lifting device will lift the lift pump away from the pump well for easy maintenance;

The equipment room is located next to the pump well on both sides of the river bank, and has a lift pump power supply system and an automatic control system for the lift pump inside;

The integrated microbial activation device is respectively designed at 1.5km upstream of the pump well in the river, and the integrated microbial activation device is connected with the lifting pump in the pump well through a pipeline; the integrated microbial activation device includes: a box, an aeration Tubes, microporous aeration discs, cross bars, non-woven bags, water pumps, and drainage pipes; the bottom of the box is equipped with aeration tubes and microporous aeration discs, and the microporous aeration discs are used to increase oxygen for microorganisms. The top of the box is 0.5 m and 0.3m at the lower end of the box are provided with crossbars, on which a non-woven bag is connected every 0.4m, evenly arranged in the box, with a diameter of 15cm, containing microbial preparations + microbial growth promoters, The lower end of one side of the box is provided with a water inlet pipe, and the other end 0.3m away from the top of the box is connected with a drain pipe to discharge the water into the river. The time for wastewater to stay in the river is set to 10h.

Example 2

A treatment method for river water pollution, comprising:

(1) Digestion of river sediment:

Sprinkle the microbial composite preparation directly into the river water body, the microbial composite preparation naturally settles into the bottom mud, and performs bioremediation on the bottom mud of the river channel water body; the microbial composite preparation has a limited composition:

The content of microbial preparation is as little as 1×10 ⁶ /mL; the dosage is: 10g/m ³ sludge

The dosage of microbial growth promoter is: 0.2g/ ^m3 sludge

The dosage of auxiliary agent is: 5mg/ ^m3 sludge;

The microbial bacterial preparation refers to: a powdery bacterial preparation composed of Bacillus, Paracoccus, flocculating bacteria and photosynthetic bacteria; wherein the weight ratio of Bacillus: Paracoccus: flocculating bacteria and photosynthetic bacteria is 5:3:2:1; The microbial growth promoter is BE extracted from "weathered lignite" in the southwest of Idaho, USA; auxiliary agent: the mass ratio of ferric sulfate to sodium acetate is 1:100;

(2) Oxygenation device:

On the second bank of the river, set up a submersible pump 2km away from the upstream of the river, and lay a pipeline 1.5km upstream along the second bank of the river, lift the river water and then discharge it evenly through the water distribution pipeline 500m upstream, and then circulate the water between 1.5km ; Increase the dissolved oxygen in the water body of the 1.5km section, and the dissolved oxygen concentration in the river 4.5km downstream can still be maintained at 1~3mg/L;

(3) Integrated microbial activation device:

The microbial preparation is activated by the integrated microbial activation device. Aeration tubes and microporous aeration discs are arranged at the bottom of the box of the device to aerate the micropores to increase oxygen for microorganisms. The top of the box is 0.5m and the bottom of the box is 0.3m. Correspondingly set up a horizontal bar, which is connected with a non-woven bag every 0.4m, evenly arranged in the box, the diameter of the bag is 15cm, and contains microbial preparations + microbial growth promoters, and the lower end of one side of the box is connected to the water pump. Use the lifting pump to lift the river water from the middle of the river into the movable microbial activation device, connect the other end 0.3m from the top of the box to the drain pipe, and discharge the effluent into the river, and the residence time of the river wastewater is set to 12h;

(4) Dosing microbial preparations and microbial growth promoters:

The non-woven bags contain microbial preparations and microbial growth promoters. The dosages of the two are respectively 0.5g/m ³ and 0.2mg/m ³ in the water body for 5 months. In the woven bag; when an emergency occurs in the water body of the river, in addition to using the integrated microbial activation device to slowly release the microbial bacteria, microbial preparations and growth promoters can be directly added to the river, and the dosages are respectively 8g/m ³ , 4mg/m ³ , add 10 times the usual dosage.

Example 3

A certain river in Tianjin has a total length of 5km, a river width of 20m, and a regular water level of 1m deep. GB3838-2002) in V class water quality standard, restore the self-purification ability and landscape function of the river section. The following measures have been taken to ensure that this type of water body meets the standards. The water quality and compliance indicators of the river course are shown in Table 1 below.

(1) Digestion of river sediment:

Since the river channel has already been dredged, there is no need for sediment digestion within three years, and the addition of microbial compound preparations for sediment digestion can be omitted. After three years, the addition of microbial compound preparations can be increased year by year, and then start. Sediment digestion.

(2) Oxygenation device:

A submersible pump (on the second bank of the river) is installed 2km away from the upstream of the river, and a submersible pump, grille, grid, gate and lifting device are installed in the water intake pump well. Lay a pipeline 1.5km upstream along the river (second bank), lift the river water and then discharge it evenly through the water distribution pipeline 500m upstream (second bank), and then circulate the water body between 1.5km; improve the water body in the 1.5km section The dissolved oxygen concentration in the river 4.5km downstream can still be maintained at 1~3mg/L, which can achieve the most efficient growth of aquatic organisms and plants; promote the growth of aquatic organisms and plants in this section of the river, and use the original The biodegradation of some microorganisms can promote the decomposition and removal of pollutants in water to a certain extent.

(3) 2 sets of integrated microbial activation devices. According to the water quality of the river, there are non-woven bags inside the integrated microbial activation device. Some of the bags are filled with microbial fillers, and some are filled with high-efficiency microbial preparations and microbial growth promoters. The interior of the device contains aeration pipes to increase oxygen for microorganisms, and the water body of the river is lifted from the middle of the river through the lift pump to enter the integrated microbial activation device. The integrated microbial activation device provides a good oxygen-enriched environment for the growth of microorganisms, allowing the microorganisms to reproduce in large numbers. The value-added microorganisms enter the river with the flow of the water body, effectively remove pollutants in the water, improve the self-purification ability of the water body, and restore the original water body. Some ecological balance. At the same time, the activation device promotes high-efficiency microorganisms to form a biofilm on the surface of the filler. As the thickness of the biofilm increases, an anoxic, anaerobic, and aerobic biological environment is naturally formed, which plays a role in the river water entering and exiting the integrated microbial activation device. adsorption and filtration.

(4) Add high-efficiency microbial preparations and microbial growth promoters

In river course management, secondary microbial preparations and microbial growth promoters are added in March-April and August-September every year. The calculation of water volume can be calculated by multiplying the river channel water level by the river length of 2000m and the river width at the midpoint of 15m to obtain a water volume of 30000m ³ . Due to the good water quality of the river, the dosage concentration of the high-efficiency microbial preparation is (0.3g/m ³ ) and the dosage concentration of the microbial growth promoter is (5mg/m ³ ). Due to the good water quality, the dosage concentration of the bacterial preparation is (5g/m ³ ) and the microbial growth promoter (2mg/m ³ ). Bacillus: paracoccus: photosynthetic bacteria weight ratio is 5:3:1; the bacteria preparation has paracoccus, a dephosphorizing and nitrogen-removing microorganism, and bacillus, which can remove organic pollutants in water bodies, and other microorganisms. Microbial growth promoter refers to BE (there are public sales in the market)

After 3 months of operation, the water quality has reached the standard.

Example 4

A certain river in Tianjin has a total length of 3km, a width of 20m above the river, and a regular water level of 1.5m. The water quality of the river is inferior to that of Class V. In order to significantly improve the water quality of the river, keep the water up to the surface water quality standard of Class V and restore the self-purification capacity of the river section and landscape features. The following measures have been taken. See Table 1 below for the river water quality and compliance indicators.

(1) Oxygenation device:

Aeration devices are placed, and aeration and flow-making equipment are placed in the center of the river to increase the dissolved oxygen content in the water body, which is conducive to the decomposition of organic matter and the survival of various organisms in the water body. 1-2 sets of aerators are installed in the river section, and the aeration should be kept as long as possible in the early stage of construction, more than 12 hours. In the later stage of construction, the aeration time can be controlled according to the needs, and aeration can be repeated for short periods of time.

(2) Digestion of river sediment:

In the high-efficiency bioreactor, add the bottom sludge microbial compound preparation (the dosage of microbial preparation, microbial growth promoter and auxiliary agent is 15g/m ³ sludge, 0.3/m ³ sludge, 3mg/m ³ sludge ; The amount of sludge is calculated according to the thickness of 0.5 meters, and the length and width are calculated as 3km and 20m according to the river channel, so the sediment volume is 30000 m ³ ). The organic pollutants in the mud are digested, and the sediment of the river water body is digested. Reduce the release of pollutants from the river sediment to the water body; through biological desilting, without dredging, and with the aeration of the river water body, the digestion of the river sediment is completed.

(3) Two sets of integrated microbial activation devices are installed on the two banks of the river, which contain non-woven bags inside, and the cloth bags are distributed and arranged in the device. It provides a good oxygen-enriched environment for the growth of microorganisms, allowing the microorganisms to multiply in large numbers. The value-added microorganisms enter the river with the flow of the water body, effectively remove the pollutants in the water, improve the self-purification ability of the water body, and restore the original ecological balance of the water body. Fundamentally improve the water environment.

The calculation of water volume can be calculated by multiplying the water level of the river channel by the river length of 3000m and the river width at the midpoint of 15m, and the water volume is 67500m ³ . Due to the good water quality of the river, the dosage concentration of the high-efficiency microbial preparation is (0.3g/m ³ ) and the dosage concentration of the microbial growth promoter is (5mg/m ³ ). It is a complex population composed of various microorganisms in the bacterial preparation, including anaerobic, facultative, aerobic and other microorganisms. Organic matter is completely decomposed into carbon dioxide and water, organic nitrogen, inorganic nitrogen, etc. are converted into nitrogen and discharged into the air, phosphorus is converted into sludge, and the remaining sludge is removed by discharging, and finally the water quality is purified.

After 4 months of operation, the water quality has reached the standard.

1. Duan Yunxia, Zheng Xianqiang, Lv Jinghua, et al. Research on the degradation characteristics and bioaugmentation effect of toluene-degrading bacteria, Environmental Pollution and Control, 2011, 7(33): 50-53.

2. Duan Yunxia, Han Zhenwei, Sui Hong, Li Xingang. Comparative study on microbial degradation of two forms of pollutant toluene in biological ventilation technology. Journal of Agricultural Environmental Science, 2004, (3):475-478

3. Lu Jinghua, Zheng Xianqiang, Tang Yunping, Duan Yunxia, Screening and degradation characteristics of high-concentration refractory industrial wastewater strains, Urban Environment and Urban Ecology, 2011, 24(3): 30-33.

Claims (4)

1. A control method for water body pollution of a river course is characterized in that it is carried out according to the following steps: (1) Digestion of river sediment: Sprinkle the microbial composite preparation directly into the river water body, the microbial composite preparation naturally settles into the bottom mud, and performs bioremediation on the bottom mud of the river channel water body; the microbial composite preparation has a limited composition: The content of microbial preparation is as little as 1×10 ⁶ /mL; the dosage is: 10-20g/m ³ sludge The dosage of microbial growth promoter is: 0.2-0.5g/ ^m3 sludge The dosage of auxiliary agent is: 2-5mg/ ^m3 sludge; The microbial bacterial preparation refers to: a powdery bacterial preparation composed of Bacillus, Paracoccus, flocculating bacteria and photosynthetic bacteria; wherein the weight ratio of Bacillus: Paracoccus: flocculating bacteria and photosynthetic bacteria is 5:3:2:1; Microbial growth promoter BE extracted from "weathered lignite" in southwest Idaho, USA; Auxiliary agent: refers to a mixture containing a trace amount of ferric salt and a small molecule carbon source substance, wherein the mass ratio of a trace amount of ferric salt to a small molecule carbon source substance is 1:100, and the trace amount of ferric Salt refers to iron sulfate; small molecule carbon source refers to sodium acetate; (2) Oxygenation device: On the second bank of the river, set up a submersible pump 2km away from the upstream of the river, and lay a pipeline 1.5km upstream along the second bank of the river, lift the river water and then discharge it evenly through the water distribution pipeline 500m upstream, and then circulate the water between 1.5km ; Increase the dissolved oxygen in the water body of the 1.5km section, and the dissolved oxygen concentration in the river 4.5km downstream can still be maintained at 1~3mg/L; (3) Integrated microbial activation device: The microbial preparation is activated by the integrated microbial activation device. Aeration tubes and microporous aeration discs are arranged at the bottom of the box of the device to aerate the micropores to increase oxygen for microorganisms. The top of the box is 0.5m and the bottom of the box is 0.3m. Correspondingly set up a horizontal bar, which is connected with a non-woven bag every 0.4m, evenly arranged in the box, the diameter of the bag is 15cm, and contains microbial preparations + microbial growth promoters, and the lower end of one side of the box is connected to the water pump. Use the lifting pump to lift the river water from the middle of the river into the movable microbial activation device, connect the other end 0.3m from the top of the box to the drain pipe, and discharge the effluent into the river. The residence time of the river wastewater is set to 10-12h; (4) Dosing microbial preparations and microbial growth promoters: The non-woven bag contains microbial preparations and microbial growth promoters, and the dosages of the two are 0.5-1g/m ³ and 0.2-0.5mg/m ³ respectively in water for 5 months. Placed in a non-woven bag; when an emergency occurs in the river channel, in addition to using the integrated microbial activation device to slowly release the microbial bacteria, microbial preparations and growth promoters can be directly added to the river channel. The dosage is 5-10g/m ³ , 2-5mg/m ³ respectively, and the dosage is 10 times of the usual dosage. 2. A control system for river water pollution, characterized in that it includes integrated microbial activation devices, equipment rooms, pump wells and pipelines for transporting water on the second bank of the river, wherein: The pump well is designed in the center of the river 1.5km downstream of the seriously polluted river section, and there are two lift pumps, grids, rams and lifting devices inside. The grid is placed in the pump well, the lift pump is placed in the grid, and the grid lifts To intercept debris in the river to avoid blocking the lift pump; there is a ram connected to the grid, and the lift pump will be lifted away from the pump well after the ram is opened, and the lifting device will lift the lift pump away from the pump well for easy maintenance; The equipment room is located next to the pump well on both sides of the river bank, and has a lift pump power supply system and an automatic control system for the lift pump inside; The integrated microbial activation device is respectively designed at 1.5km upstream of the pump well in the river, and the integrated microbial activation device is connected with the lifting pump in the pump well through a pipeline; the integrated microbial activation device includes: a box, an aeration tubes, microporous aeration discs, cross bars, non-woven bags, water pumps, and drainage pipes; the aeration tube (1) and microporous aeration discs (2) are arranged at the bottom of the box, and the microporous aeration discs are used for microbial growth Oxygen, the top 0.5m of the box and the bottom 0.3m of the box are provided with crossbars (3), and a non-woven bag (4) is connected to the crossbar every 0.4m, evenly arranged in the box, and the diameter of the bag is 15cm , containing microbial preparations + microbial growth promoters, a water inlet pipe (5) is installed at the lower end of one side of the box, and a drain pipe (6) is connected to the other end 0.3m from the top of the box to discharge the water into the river. 3. The system for river water pollution control according to claim 2, characterized in that the system on the second bank of the river is only responsible for the governance of the 5km river range and the maintenance of river water quality. When the river is greater than 5km, the pollution status of the river is tested And the length of the river, the second bank can increase or decrease the entire equipment system. 4. The application of the river channel water pollution treatment method according to claim 1 in removing various pollutants in water and purifying water quality.