CN112759181B - Novel black and odorous river water endogenous treatment method - Google Patents

Abstract

The invention discloses a novel endogenous treatment method for black and odorous river water, which comprises the following steps: a water surface suspended matter cleaning system, a water bottom sediment pollution removing system and a water quality improving measure. Aiming at the pollution of the inner lakes of the river and lake water bodies, the treatment is respectively carried out from the surface of the water body, the sludge at the bottom of the water body and the water body. For suspended matters, algae, oil stains and the like on the surface of the water body, pollutants are floated on the water surface by adding a floating coagulant, the surface pollutants are collected and pumped to micro-nano bubble floatation equipment for treatment through a water surface slag conveyor, clear water returns to the water body, and the pollutants are transferred and treated. For the water bottom sludge, the water bottom sludge is treated by a bottom sludge elution technology, light and organic colloid pollutants in the bottom sludge are eluted, and the influence of the bottom sludge pollutants on the water quality of a water body is eliminated. For a water body, an EM (effective microorganisms) bacterium and an underwater forest measure are added to construct a water body ecological system, so that the long-acting water quality is maintained to reach the standard.

Description

A new type of internal source control method for black and odorous river water

technical field

The invention relates to the technology in the field of sewage treatment, in particular to a novel method for treating the internal source of black and odorous river water.

Background technique

With the rapid development of my country's social economy and the acceleration of urbanization, the scale and population of cities and towns continue to increase, the discharge of human production and domestic sewage is increasing, and the concentration of pollutants entering the water body exceeds the self-purification capacity of the water body. Aerobic microorganisms consume oxygen in the water body through metabolism, making the water body in anoxic or anaerobic state. At this time, the mass-proliferated anaerobic microorganisms react with organic matter such as corruption, decomposition and fermentation, and produce organic sulfides, ammonia nitrogen and methane, etc. 14000 A variety of odor-causing gases; at the same time, heavy metals such as iron and manganese in the water body are reduced, and combine with sulfur ions to form black precipitates such as FeS and MnS, making the water body black. In addition, urban water bodies have poor fluidity and insufficient hydropower, leading to deterioration of the water environment, accumulation of pollutants, and aggravation of black and odorous water bodies. The existence of black and smelly river water not only brings bad sensory stimulation to people, but also directly poses a serious threat to people's drinking water and water safety.

At present, the treatment of urban black and odorous river water mainly includes physical treatment technology, chemical treatment technology and biological ecological treatment technology. Although three treatment technologies are widely used in the treatment of black and odorous river water, each of them has different advantages and disadvantages, and the use of a certain technology alone may not guarantee its long-term effectiveness. Therefore, the joint application of various technologies in the treatment of black and odorous river water has achieved good results. Among them, the internal source control of black and odorous river water is the basic measure.

Therefore, there is an urgent need for a new type of internal source treatment method for black and odorous river water, which is aimed at treating sewage rivers with low water levels and small and narrow channels.

Contents of the invention

In view of this, the present invention aims at the deficiencies in the prior art, and its main purpose is to provide a new type of black and odorous river water internal source treatment method, which can deal with river and lake pollutants from the bottom, water body and water surface, so as to achieve the quality of river and lake water. The effect of repair.

To achieve the above object, the present invention adopts the following technical solutions:

A new type of black and odorous river water endogenous treatment method, including

Water body sediment pollution removal:

Drive the sediment elution ship into the sewage river or lake to elute the light, organic colloidal pollutants in the sediment; The elution tank is closed around the top and only has an opening at the bottom. Use the hood-type elution tank to go deep into the bottom of the water and cover the sediment, isolate the part of the bottom that needs to treat the sediment, and prevent the release of pollutants by covering the deep silt in situ , and then use high-pressure water column inside the hood-type elution chamber to stir and mix the sewage, sediment, and sediment, and then control the stirring speed to suspend the light gelatinous floating mud into the water body and then settle to form a layer of organic floating mud , while the heavy sediment and inorganic matter settle, and then the organic floating mud in the hood-type elution chamber is pumped out of the water surface by suction to separate the mud and water, and the clean water is returned to the river or lake, and then the sediment is washed by the boat Move and drive the hood-type elution chamber to process the underwater sediment at the next position, and repeat it continuously;

Improvement of water quality:

First increase oxygen through micro-nano bubbles, and then add EM bacteria, microalgae and underwater forest measures to build a water ecosystem and maintain long-term water quality compliance; the way of increasing oxygen by micro-nano bubbles is based on micro-nano aeration devices, The air pump pressurizes and rotates the aeration stone inside the aeration head at a high speed. Under centrifugal action, a negative pressure zone is formed inside the aerator head. And the central gas belt, the air is uniformly cut into micro-nano micro-bubbles with a diameter of 5-30 nanometers by the high-speed rotating aeration stone gas outlet, the micro-bubbles improve the efficiency of sewage oxygen dissolution, and have good air flotation properties Stay in the sewage for a long time, so as to achieve a better aeration effect. The delivery method of EM bacteria and microalgae is to first use EM bacteria for bioremediation and phytoremediation of sewage, and then put in microalgae to form symbiotic organisms with EM bacteria Combined treatment; the underwater forest is a grid-like underwater plant planting base of degradable materials laid on the bottom of the river or lake, and the planting base is fixed with fixing parts, and the underwater plants grow freely to form an underwater forest;

Cleaning of suspended solids on the surface of water bodies:

For suspended matter, algae, and oil on the surface of the water body, the pollutants are floated to the water surface by adding a floating coagulant, and then the surface pollutants are collected and pumped to the micro-nano bubble air flotation equipment for treatment through the surface slag removal machine, and the clear water is returned to the water body. Pollutant transfer and disposal; the components of the floating coagulant are chitosan, polyferric sulfate, permanganate and sulfonated lignin salt.

Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above-mentioned technical scheme that for the inner lake pollution of river and lake water bodies, the water body surface, the bottom silt and the water body itself are respectively treated from three levels. . For suspended solids, algae, oil, etc. on the surface of the water body, the pollutants are floated to the water surface by adding a floating coagulant, and then the surface pollutants are collected and pumped to the micro-nano bubble air flotation equipment for treatment through the surface slag removal machine, and the clear water is returned to the water body , Pollutant transfer and disposal. For underwater sludge, it is treated by sediment elution technology to elute light and organic colloidal pollutants in the sediment and eliminate the impact of sediment pollutants on water quality. For water bodies, by adding EM bacteria and underwater forest measures, the water body ecosystem can be constructed to maintain long-term water quality standards.

In particular, the hood-type elution tank is used to partially isolate the water body, and the in-situ treatment method does not need to drain the river water and then use an excavator to dredge it, and does not need to use dams to intercept the river water, but directly in the Sewage treatment in active water bodies is simple, convenient and cost-effective. In addition, the hood-type elution chamber of the present invention is closed around the top and only has an opening at the bottom, and the hood-type elution chamber is used to go deep into the bottom of the water and cover the sediment, so as to isolate the parts of the bottom of the water that need to process the bottom mud, and in situ The method of covering the deep layer of sludge prevents the release of pollutants, so that the sludge will not overflow due to the movement of the internal water body during sludge treatment. It is only carried out in the hood-type elution chamber, so the entire sludge treatment process itself is environmentally friendly. After the water body is isolated by a hood-type elution chamber, the sewage, sediment, and sediment are stirred and mixed with a high-pressure water column inside, so that the lighter, colloidal floating mud is suspended in the water body and then settles to form a layer of organic floating mud. , while the heavy sediment and inorganic matter settle, and then the organic floating mud in the hood-type elution chamber is pumped out of the water surface by suction to separate the mud and water, and the clean water is returned to the river or lake. This method is harmful to the original The presence of water will not cause secondary pollution, and the entire treatment method is simple and fast.

In order to more clearly illustrate the structural features and functions of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is a schematic diagram of a black-smelly river water endogenous treatment method according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of an integrated sediment washing vessel according to the first embodiment of the present invention.

Fig. 3 is the processing flowchart of the black and smelly river bottom mud of the second kind of embodiment of the present invention.

Fig. 4 is the schematic diagram of the treatment of black and odorous river bottom mud of the third embodiment of the present invention.

Fig. 5 is a schematic diagram of the simple sludge treatment equipment in the third embodiment of the present invention.

Fig. 6 is a comparative effect diagram before and after the sediment elution of the present invention.

Fig. 7 is a columnar sample diagram before and after elution of bottom mud of the present invention.

reference sign

10. Sediment washing vessel 11. High pressure water pump

12. Organic sludge pump 13. Dosing pump

14. Labor-saving pulley 20. Hooded elution chamber

21. Metal cover body 22. High-pressure water jet nozzle

23. Sludge suction head 24. Spray nozzle

25. Micropore 30. Micro-nano aeration device

40. Slag removal machine on water surface 50. Integrated air flotation equipment

60. Simple sludge treatment equipment 101. Organic floating mud

102. Inorganic sediment.

Detailed ways

Please refer to Fig. 1, which shows the technical solution of the present invention, which is a novel method for controlling the internal source of black and odorous river water, including the removal of sediment pollution in water bodies, the improvement of water quality in water bodies, and the cleaning of suspended solids on the surface of water bodies.

Wherein, water body sediment pollution removal: refers to driving the sediment eluting ship 10 into a sewage river or lake to elute light, organic colloidal pollutants in the sediment. The sediment elution method is to configure a hood-type elution chamber 20 on the sediment elution ship. The hood-type elution chamber is closed around the top and only has an opening at the bottom. , to isolate the part of the bottom of the water where the sediment needs to be treated, and prevent the release of pollutants by covering the deep sludge in situ, and then use high-pressure water column, air flow or mechanical deflection inside the hood-type elution chamber to remove the sewage, sediment, and sediment Stir and mix, and then control the stirring speed to suspend the light colloidal floating mud into the water body and then settle to form a layer of organic floating mud 101, while the heavy sediment inorganic 102 settles, and then remove it by suction The organic floating mud in the hood-type elution chamber is pumped out of the water surface for mud-water separation, and the clear water is returned to the river or lake, and then the sediment elution ship moves to drive the hood-type elution chamber to carry out the underwater sediment treatment at the next position, so Repeat continuously to remove the 20-40mm thick sludge under the water.

Improvement of water quality: It refers to increasing oxygen through micro-nano bubbles, and then adding EM bacteria, microalgae and underwater forest measures to build a water ecosystem and maintain long-term water quality compliance. The micro-nano bubble oxygenation method is based on the micro-nano aeration device 30, pressurized by the air pump, and rotates the aeration stone inside the aeration head at a high speed. Under centrifugal action, a negative pressure zone is formed inside the aeration head, and the air passes through The air inlet enters the negative pressure area, and is divided into a peripheral liquid zone and a central gas zone inside the aerator head. The air is uniformly cut into micro-nano tiny bubbles with a diameter of 5-30 nanometers by the high-speed rotating aeration stone outlet. Air bubbles improve the efficiency of dissolved oxygen in sewage, and at the same time have good air buoyancy, and can stay in sewage for a long time, so as to achieve better aeration effect. Bioremediation and phytoremediation, then put in microalgae, and combine with EM bacteria to form symbiotic organisms; the underwater forest is a grid-like underwater plant planting base made of degradable materials laid on the bottom of a river or lake, and the planting base is fixed with fixing parts , underwater plants grow freely to form an underwater forest.

Cleaning of suspended solids on the surface of the water body: refers to the suspension of suspended solids, algae, and oil on the surface of the water body. The pollutants are floated to the water surface by adding a floating coagulant, and then the surface pollutants are collected and pumped to the micro-nano bubble gas by the water surface slag removal machine 40. The floating equipment is used for treatment, the clear water is returned to the water body, and the pollutants are transferred and disposed of; the components of the floating coagulant are chitosan, polyferric sulfate, permanganate and sulfonated lignin salt.

Example 1

As shown in Figure 2, for rivers or lakes with some water depths, a sludge washing vessel 10 integrated with sludge treatment can be used, that is, the integrated air flotation device 50 is arranged on the sediment washing vessel 10, and the sludge The collection tank 51, the micro-nano bubble separation device 52, the mud storage tank 53, and the sludge filter press 54 are all built on the ship, so that the sludge extracted from the hood-type elution chamber 20 can be directly washed on the bottom mud elution ship. After processing, the dehydrated mud cake is finally obtained, and then shipped out. The sludge treatment process is to first use the hood-type elution chamber 20 to absorb the organic floating mud 101, the organic floating mud 101 is pumped into the sludge collection tank 51 through the organic floating mud pump 12, and the micro-nano bubble separation device 52 is used to realize the further purification of the organic floating mud. Separation becomes two kinds of materials of floating and sinking, and the floating matter is scraped to the mud storage tank 53 with the mud scraping device 205, and the mud storage tank 53 is pumped to the sludge filter press 54 with the sludge pump, and the sludge pump is also used to remove the sludge. The sinking matter is pumped to the sludge filter press 54, and the sludge filter press 54 forms a mud cake after dehydration. These devices built on the ship will increase the draft of the ship, so they are only suitable for rivers in deep water areas.

Example 2

For rivers or lakes with shallower riverbeds, the following schemes need to be adopted: referring to Fig. 3, use light boats as much as possible, and remove the heavy device on the bottom mud washing boat 10, so that the boats can enter shallow water with a shallower draft river or lake. The sludge collection tank 51, micro-nano bubble separation device 52, and sludge storage tank 53 for sludge treatment form an integrated device (see FIG. 3 ) all built on the river embankment, and the sludge filter press 54 can be vehicle-mounted. The organic floating mud 101 is pumped to the integrated equipment on the embankment, and then the sludge is gradually treated. For the sludge treatment method, refer to Embodiment 1.

Example 3

For some sewage rivers, the river channel is small and narrow, and the embankment cannot provide enough space for the construction of large-scale sludge treatment equipment, use the method shown in Figure 4 to solve the problem. Adopt lightweight mud to wash out ship 10, equally can reduce the weight of hull. Therefore two hanging towers 14,15 are set, one is used to hang the cover type elution chamber 20, and the other is used to hang the simple sludge treatment equipment 60, and the collected organic sewage can be treated by the simple and easy sludge treatment equipment 60. The mud is temporarily stored, and then transported to the integrated air flotation device 50 on the shore for further processing after the storage is full.

The specific scheme is as follows: first introduce the structure of the hood-type elution chamber. The hood-type elution chamber 20 is a metal cover body 21, which can sink underwater with its own weight, and is installed on the bottom mud by hanging with a labor-saving wheel bracket. Elution boat, for example using labor-saving pulley 14. And, the length, width and height of the hood-type elution chamber are preferably 1-5m, 1-5m, and 0.5-1m. When the sewage treatment river surface is narrow, a hood-type elution chamber with a smaller size can be selected; Use the larger size. When working, at least 0.2m of the hood-type elution chamber is inserted into the sediment layer at the bottom of the water, forming an in-situ covering of deep silt to prevent the release of pollutants. It is precisely because of the closed structure of the hood-type elution chamber that when the sediment is stirred, the turbid sludge water will only be carried out in the chamber, and the pollutants will not be diffused to the outside.

In addition, the hood-type elution chamber 20 has a built-in high-pressure water column injection head 22 , a sludge suction head 23 , and a spray nozzle 24 . The high-pressure water column injection head 22 is connected to the high-pressure water pump 11 through a hose. The high-pressure water pump 11 is placed in the cabin of the sediment washing ship 10. One end of the high-pressure water pump 11 is pumped into the river water through a pipeline, and is pressurized by the high-pressure water pump to form high-pressure water. The hose at the other end leads to the high-pressure water column injection 22, and injects high-pressure water column to the hood-type elution chamber, so that the water body in the hood-type elution chamber is rolled and stirred to form sediment mixing. The sludge suction head 23 is connected to the organic floating mud pump 12 through a hose, and the organic floating mud pump 12 is placed in the cabin of the bottom mud washing ship 10, and one end of the organic floating mud pump 12 is connected to the simple sludge Treatment equipment 60, simple sludge treatment equipment 60 is connected to the integrated air flotation equipment or mobile sludge truck on the river bank again; In the cabin of the sediment elution ship 10, one end of the dosing pump is connected to the medicine tank, and the dosing pump injects the medicine for accelerating the sedimentation of the sludge into the hood-type elution chamber through the spray nozzle.

The high-pressure water jet nozzle 22 is used to shoot the high-pressure water jet to the bottom of the mud, so that the organic matter and inorganic matter at the bottom of the water are all stirred and mixed. As the high-pressure water jet stops, the heavier sand will sink, and the lighter, colloidal sand will sink. The floating mud is located on top of the sand. After settling for a period of time, use the sludge suction head to remove the sludge with a thickness of 20-40mm in the bin, so as to ensure that the sludge is pumped out instead of sand. In addition, the sedimentation of sludge is accelerated through the way of dosing, so that sludge treatment is more efficient.

In this embodiment, the polyacrylamide coagulant is stored in the medicine tank, and the polyacrylamide coagulant is a commonly used flocculant, and its use effect is ideal. At present, this flocculant is generally used as an auxiliary agent in sedimentation tanks, which are static and common. However, there is no case where it is directly applied to a dynamic channel with constant water flow as a flocculant that can be used in conjunction with a hood-type elution chamber.

In addition, when dealing with some small sewage rivers, when the size of the hood-type elution chamber selected is small and light, when a high-pressure water gun is equipped to flush the sediment, the hood-type elution chamber may vibrate or even overturn. Therefore, a number of micropores are provided on the top of the hood-type elution chamber for the discharge of air or water, so as to ensure the relative balance between the air pressure and water pressure in the chamber and the outside world, and prevent the chamber from turning over.

In this third embodiment, the simple sludge treatment equipment 60 is not on the ship or on the shore, but is dragged by the sediment washing ship 10 and walks in the river synchronously with the sediment washing ship 10 . The simple sludge treatment equipment 60 is different from the above-mentioned integrated air flotation equipment 50. As a connecting device before entering the integrated air flotation equipment 50, the main function is to carry out preliminary treatment of sludge, and has a certain amount of sludge The function of dehydration and water purification brings convenience to some narrow and small smelly ditches for sludge treatment.

Specifically, as shown in Figure 5, this simple sludge treatment equipment 60 contains a sludge collector 61, and the periphery of this sludge collector 61 is provided with spiral type seepage pipes 63, and the inlet of these spiral type seepage pipes 63 The liquid port 631 is located at the bottom of the sludge collector 61 and communicates with the sludge collector 61, and the liquid outlet 632 is located at the upper part of the sludge collector 61 and communicates with the sludge collector 61, but the liquid outlet 632 will not be higher than The minimum liquid level of the sludge collector 61. In this way, the water flows by gravity, and the drainage in the sludge passes through the liquid inlet 631 in the spiral seepage pipe 63, and finally flows out from the liquid outlet 632. In particular, the present invention also arranges one or more horizontal tube reactors 64 on the spiral seepage tube 63, and the horizontal tube reactor 64 and the spiral seepage tube 63 are connected by an elbow flange 641 to realize various Removable replacement of horizontal tube reactor. The horizontal tube reactor 64 is a tubular electrode, which can break the sludge wall. Even if the sewage returns to the river, the harmful organisms in the sewage have been destroyed and no odor will be produced, so as to achieve the purpose of filtering sewage, deodorizing and purifying.

And, in order to prevent the spiral seepage pipe 63 from being blocked, a one-way cover plate and a grid net are installed at the position of the liquid inlet 631 to prevent backflow of sewage in the spiral seepage pipe 63 and prevent the liquid inlet 631 from being blocked. In this way, the moisture in the organic floating mud 101 can be detached and returned to the sewage river through the spiral seepage pipe 63, so as to reduce the weight and make the mud more compact, so that more mud can be loaded at one time.

The methods of the above-mentioned Examples 1, 2, and 3 were used to collect and compare the bottom mud. The situation before and after the elution through the above steps can refer to Fig. 6 and Fig. 7 . As shown in the left picture of Figure 6, the bottom mud before elution is black and contains rich nutrient-rich substances, which is also an important reason for the black and smelly river water. The right picture of Figure 6 is the eluted bottom mud, which is gray, and a large amount of nutrient-rich substances have been removed. As shown in Figure 7, the left side of Figure 7 is the columnar sample before elution, and the right side is the columnar sample after elution. It is obvious that the dirty layer that produces black odor at the bottom of the water is isolated with the elution layer, and it can be used under ideal conditions. Remove all contamination layers.

After the above sediment treatment, the mud-water boundary can be made clear, even if it is shaken again, it will be clarified quickly, and the anaerobic upwashing of the sediment and the black odor of the water body can be quickly eliminated. After elution, the amount of pollutants and algae cells is significantly reduced, and the following table is used for comparison.

Elution time 1min 3min 5min Chlorophyll reduction 11-23% 48-56% 85-95% total phosphorus reduction 9-14% 25-38% 85-95% total nitrogen reduction 3-7% 13-21% 56-80%

Regarding the improvement of water quality: the above-mentioned improvement method refers to the oxygenation of micro-nano bubbles, as well as the use of EM bacteria culture and underwater forest construction. In this embodiment, the method of increasing oxygen by micro-nano bubbles is firstly used, and at the same time, the floating-type coagulant is added. Through the transformation of the micro-nano aeration device, using the formation principle of the negative pressure zone, the floating coagulant is put in at the same time as the aeration. As mentioned above, during aeration, the underwater will be divided into a peripheral liquid zone and a central gas zone. When the micro-nano bubbles are dispersed at the bottom of the water, they will drive the floating coagulant into the water together, which can avoid the operation of stirring.

In this embodiment, the floating coagulant contains 20-30 parts by mass of chitosan, 20-35 parts of polyferric sulfate, 20-30 parts of permanganate, and 30-40 parts of sulfonated lignin salt. in,

Polyferric sulfate is an intermediate hydrolyzate prefabricated by iron salt, which belongs to water-soluble inorganic macromolecular substances. 2, Fe3(OH)5+4 and other hydroxyl bridges formed by all levels of multi-nuclear complex iron ions. Therefore, it has a strong ability to neutralize the charge on the suspended particles, make it destabilized and generate larger particle flocs, and because of its large specific surface area and strong adsorption capacity, it is effective for emulsified oil in sewage. Good demulsification effect, strong adsorption capacity for heavy metals, odors and pigments, showing its unique advantages when used.

Polymerized ferric sulfate, also known as basic ferric sulfate, is a new type of efficient water treatment agent, widely used in the treatment of drinking water, industrial wastewater, and urban sewage. Polyferric sulfate (PFS) has various forms of iron complex ions in water, such as [Fe(OH)2]+, [Fe(OH)]2+, [Fe2-(OH)2]4+, etc. They form multinuclear complex ions with ─OH bridging. These multinuclear complex ions can be miscible with water in any proportion, and play the role of electrical neutralization and adsorption bridging. Polymerized ferric sulfate flocculant is essentially an intermediate product in the transformation process of ferric sulfate in water, such as hydrolysis, complexation, polymerization, gelation, and precipitation. The basic reaction formula of Fe(Ⅲ) hydrolysis can be written as: Fe(H2O)3+6+nH2O=[Fe(OH)n(H2O)6-n](3-n)++nH3O+ when the pH value of the solution rises When the concentration is high, the mononuclear hydroxyl complex ion will generate a hydroxyl bridged multinuclear complex, and the basic reaction formula can be written as [Fe(OH)+2]n+Fe3++2H2O=[Fe(OH)+2]n+ 1+2H+ generates hydroxyl-bridged polynuclear complexes, which will partially react [Fe(OH)+2]n=[FeO(OH)]n+nH+ more slowly.

Chitosan

Chitosan, the product of deacetylation of chitin, is very rich in natural sources, can exhibit cationic polyelectrolyte properties in acidic media, and is non-toxic and easily biodegradable. The flocculation ability can be improved through the synergistic effect of chitosan and polyferric sulfate. The chitosan molecular chain is positively charged, which can enhance the neutralization ability of electricity through the superposition of positive charges with polyferric sulfate. In addition, each unit of chitosan molecule has an amino group, which can chelate with the metal ion of polyferric sulfate, over-adsorb, and net catch and bridging. The molecular chain of the organic polymer is named between the particles that have been destabilized. Build bridges to enhance the ability to remove tiny particles in water.

permanganate

Potassium permanganate is a strong oxidant, which can be combined with the adsorption of polyferric sulfate. It has a good function of removing algae and odor in rivers or lakes, and quickly clears the water body. On this basis, a sulfonated lignin salt is added as an air-entraining agent. Since the sulfonated lignin salt is sodium lignosulfonate or magnesium lignosulfonate, which are both natural products, the performance is stable and non-toxic harmless. As an air-entraining agent, the flocculated material floats to the surface of the water and is collected by a slag machine to remove these pollutants from the river/lake water.

After the above treatment, the sludge at the bottom of the river is removed, the suspended solids in the river water are basically removed, and the clear water becomes clear. Add EM bacteria and algae again. The EM bacteria are microbial agents, including photosynthetic bacteria, lactic acid bacteria, yeast, actinomycetes and the like. In the restoration process, some algae-eating insects, aquatic animals, water earthworms, etc., as well as algae can also be introduced. Then start the construction of the underwater forest.

Application example 1: Treatment of black and odorous water body in Sanbagou, Suzhou City

As shown in Figure 5, the pollution of the water body in the ditch is dealt with from three levels: the surface of the water body, the bottom silt, and the water body itself. For suspended solids, algae, oil, etc. on the surface of the water body, the pollutants are floated to the water surface by adding a floating coagulant. The weight ratio of the floating coagulant is: 20 parts of polysaccharide, 35 parts of polyferric sulfate, and 30 parts of permanganate Parts, 40 parts of sulfonated lignin salt. Then the surface pollutants are collected and pumped to the micro-nano bubble air flotation equipment through the water surface slag removal machine 40, and the clean water is returned to the water body, and the pollutants are transferred and disposed of. For underwater sludge, it is treated by sediment elution technology to elute light and organic colloidal pollutants in the sediment and eliminate the impact of sediment pollutants on water quality. For water bodies, by adding EM bacteria and underwater forest measures, the water body ecosystem can be constructed to maintain long-term water quality standards. The effect after sewage treatment can be seen in the table below:

Content Detection Items Transparency (cm) Dissolved oxygen (mg/L) ORP(mV) Ammonia nitrogen (mg/L) Before the test 18 2.7 25 10.50 Mid-trial 34 3.6 101 12.20 late test 35 3.7 127 7.78 Black and odor standard >25 >2 >50 <8 evaluation result Eliminate black odor Eliminate black odor Eliminate black odor Eliminate black odor

Application example 2: Treatment of black and odorous water body in Maozhou River, Dongguan City

The treatment method is the same as the above case 1, but the weight ratio of the floating coagulant is different. The input amount is: 30 parts of polysaccharide, 25 parts of polyferric sulfate, 40 parts of permanganate, and 30 parts of sulfonated lignin salt. The effect after sewage treatment can be seen in the table below:

Content Detection Items Transparency (cm) Dissolved oxygen (mg/L) ORP(mV) Ammonia nitrogen (mg/L) Before the test 11 0.84 -15.5 10.4 late test 40 5.6 114 5.5 Black and odor standard >25 >2 >50 <8 evaluation result Eliminate black odor Eliminate black odor Eliminate black odor Eliminate black odor

The above descriptions are only preferred embodiments of the present invention, and do not limit the technical scope of the present invention in any way, so any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention are still valid. It belongs to the scope of the technical solutions of the present invention.

Claims (8)

1. A novel black and odorous river water endogenous treatment method is characterized by comprising the following steps: comprises that

And (3) clearing water body sediment pollution:

driving a bottom mud elution ship into a sewage river or lake to elute light and organic colloidal pollutants in the bottom mud; the bottom mud elution method is that a cover-type elution bin is arranged on a bottom mud elution boat, the periphery and the top of the cover-type elution bin are sealed, only the bottom of the cover-type elution bin is provided with an opening, the cover-type elution bin is penetrated into the water bottom and covers silt, the position of the part of the water bottom needing to be treated is isolated, pollutant release is prevented in a mode of covering deep silt in situ, then sewage, silt and bottom mud are stirred and mixed by adopting high-pressure water column injection in the cover-type elution bin, then colloidal floating mud with lighter mass is suspended in a water body by controlling the injection speed and then is settled to form a layer of organic floating mud, heavy silt inorganic matter is settled, organic floating mud in the cover-type elution bin is pumped out of the water surface by a suction mode to carry out mud-water separation, clear water returns to a river or a lake, then the bottom mud elution boat moves to drive the cover-type elution bin to carry out bottom mud treatment at the next position, and the process is repeated;

the cover-type elution bin is internally provided with a high-pressure water column spray head, a sludge suction head and a pesticide spray nozzle, the high-pressure water column spray head is connected with a high-pressure water pump through a hose, the high-pressure water pump is arranged in a cabin of a sediment elution ship, one end of the high-pressure water pump is pumped into river water through a pipeline, high-pressure water is formed by pressurization of the high-pressure water pump and is led to the high-pressure water column spray head through the hose at the other end of the high-pressure water pump, the high-pressure water column is ejected out of the cover-type elution bin, and water in the cover-type elution bin is rolled and stirred to form silt mixture; the sludge suction head is connected with an organic floating sludge pump through a hose, and the organic floating sludge pump is arranged in a cabin of the bottom sludge elution ship; the medicine feeding pump is arranged in a cabin of the bottom mud elution boat, one end of the medicine feeding pump is connected with the medicine tank, and the medicine for accelerating sludge sedimentation is thrown into the cover type elution cabin through the medicine feeding pump;

one end of the organic floating sludge pump is connected with a simple sludge treatment device, and the simple sludge treatment device is connected to an integrated air floatation device or a movable sludge truck on the river bank; the simple sludge treatment equipment comprises a sludge collector, wherein spiral seepage pipes are arranged on the periphery of the sludge collector, liquid inlets of the spiral seepage pipes are positioned at the lower part of the sludge collector and are communicated with the sludge collector, liquid outlets are positioned at the upper part of the sludge collector and are communicated with the sludge collector, but the liquid outlets are not higher than the lowest liquid level of the sludge collector, a one-stage or multi-stage cross-tube reactor is arranged on the spiral seepage pipes, the cross-tube reactor is connected with the spiral seepage pipes through elbow flanges, and the cross-tube reactor is a tubular electrode and is used for breaking the wall of the sludge;

water quality improvement:

firstly, aerating oxygen by micro-nano bubbles, and adding EM (effective microorganisms), microalgae and underwater forest measures to construct a water body ecological system and maintain the long-acting water quality to reach the standard; the aeration mode of the micro-nano bubbles is based on a micro-nano aeration device, aeration stones in an aeration head are pressurized through an air pump, a negative pressure zone is formed in the aeration head under the centrifugal action, air enters the negative pressure zone through an air inlet, a peripheral liquid zone and a central gas zone are divided into the aeration head, the air is uniformly cut into micro-nano micro bubbles with the diameter of 5-30 nanometers by an air outlet part of the high-speed rotating aeration stones, the micro bubbles improve the oxygen dissolving efficiency of sewage, and meanwhile, the micro-nano bubbles have good air buoyancy and can stay in the sewage for a long time, so that a good aeration effect can be achieved; the feeding mode of the EM bacteria and the microalgae is that the EM bacteria are firstly adopted to carry out the bioremediation and the phytoremediation of the sewage, and then the microalgae are fed in to form symbiotic organisms with the EM bacteria for combined treatment; the underwater forest is formed by paving a latticed underwater plant planting base made of degradable materials at the bottom of a river or a lake, fixing the planting base by using a fixing part, and freely growing underwater plants to form the underwater forest;

cleaning suspended matters on the surface of a water body:

floating the pollutants, algae and oil stains on the surface of the water body, adding a floating coagulant to float the pollutants on the water surface, collecting and pumping the surface pollutants to a micro-nano bubble air floatation device through a water surface slag conveyor for treatment, returning clear water to the water body, and transferring and treating the pollutants; the floating coagulant comprises chitosan, polymeric ferric sulfate, permanganate and sulfonated lignin salt.

2. The novel endogenous treatment method for the black and odorous river water according to claim 1, which is characterized in that: the length, width and height of the cover type elution bin are 1-5m, 1-5m and 0.5-1 m; when the cover type elution bin works, at least 0.2m of the cover type elution bin is inserted into a sediment layer at the bottom of water to form in-situ covering deep silt and prevent pollutants from being released.

3. The novel endogenous treatment method of the black and odorous river water according to claim 1, which is characterized in that: and the medicine tank is used for storing a polyacrylamide coagulant aid.

4. The novel endogenous treatment method of black and odorous river water according to claim 1 or 3, which is characterized in that: the top of the cover-type elution bin is provided with a plurality of micropores for discharging air or water.

5. The novel endogenous treatment method of the black and odorous river water according to claim 1, which is characterized in that: the cover type elution bin is a metal cover body and is arranged on the sediment elution ship by a labor-saving wheel bracket in a hanging mode.

6. The novel endogenous treatment method of the black and odorous river water according to claim 1, which is characterized in that: the EM bacteria is microbial agent, including photosynthetic bacteria, lactic acid bacteria, yeast and actinomycetes.

7. The novel endogenous treatment method of the black and odorous river water according to claim 1, which is characterized in that: the floating coagulant comprises, by mass, 20-30 parts of chitosan, 20-35 parts of polymeric ferric sulfate, 20-30 parts of permanganate and 30-40 parts of sulfonated lignin salt.

8. The novel endogenous treatment method of the black and odorous river water according to claim 1, which is characterized in that: the sulfonated lignin salt is sodium lignosulfonate or magnesium lignosulfonate.

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