CN118184077A

CN118184077A - A method for regulating algae phase dominated by diatoms

Info

Publication number: CN118184077A
Application number: CN202410527406.9A
Authority: CN
Inventors: 魏越波; 冯攀; 汪炜; 兰健群; 段馨雨; 万豪琰
Original assignee: Power China Jiangxi Hydropower Engineering Bureau Co ltd
Current assignee: Power China Jiangxi Hydropower Engineering Bureau Co ltd
Priority date: 2024-04-29
Filing date: 2024-04-29
Publication date: 2024-06-14
Anticipated expiration: 2044-04-29
Also published as: CN118184077B

Abstract

The invention discloses a method for regulating algae phase of diatom accounting for a main body, and relates to the technical field of river and lake water environment. Setting a flotation purification area, adding a flocculating agent, primarily precipitating massive impurities, and simultaneously adding an air floatation device in the area to enable floatable impurities to float and then dehydrating and removing the trash rack; setting a sedimentation promoting and purifying area, adding a flocculating agent to enable colloid particles to collide with each other to form flocculent coagulating sedimentation; an algae phase adjusting area is arranged, a carbon source is supplemented, denitrification is enhanced, total nitrogen is reduced, and growth of diatom is inhibited; the reinforced treatment area is arranged, the water body is purified by the reinforced floating island ecological wall, and the effect of purifying the water body is achieved by utilizing plankton to digest sewage and photosynthesis of plankton. The invention takes diatom as a main material, and inhibits the growth of diatom by treating water body, so that green algae becomes dominant population gradually.

Description

Algae phase adjusting method for diatom accounting for main body

Technical Field

The invention relates to the technical field of river and lake water environments, in particular to an algae phase adjusting method for diatom accounting for a main body.

Background

At present, the front lake water system is mainly yellow green in view of the water color of water bodies observed on site, except that the water bodies in the water bodies are yellow mud color caused by living water pumps, aeration, human factors and the like, the algae biomass detected at each sampling point is mainly diatom and green algae, and the algae biomass accords with the water color presented by the algae water, so that the algae is an important factor influencing the water color of the front lake water system. From the graph of the biomass ratio of green algae to diatom in the detection data, it is known that the growth of green algae and diatom is mutually inhibited, and the competition of diatom is greater than that of green algae in the front lake water system, which is the reason for the brown color of water. In better water quality, green algae should be more competitive than diatom algae, and only a clear water color will appear when green algae is more competitive (more ratio). Based on this, development of a method for regulating algae phase of diatom is needed.

Disclosure of Invention

Aiming at the defects existing in the prior art, the invention aims to provide the algae phase regulating method with diatom accounting for the main body, which can effectively improve water quality, regulate algae population, convert diatom advantage into green algae, eliminate water color and is easy to popularize and use.

In order to achieve the above object, the present invention is realized by the following technical scheme: the algae phase regulating method for the diatom accounting for the main body is realized through the following steps:

① And (3) flotation and purification: setting a first piece of area as a flotation purification area, adding a flocculating agent into a water inlet of a front lake adjusting pond, diffusing the flocculating agent under water flow flushing to primarily precipitate massive impurities, and simultaneously adding an air floatation device under the first piece of area to remove the floatable impurities through dehydration of a trash rack after floating;

② And (3) promoting sedimentation and purification: setting a second block area as a sedimentation promoting and purifying area, adding a flocculating agent to enable colloid particles to collide with each other to form flocculent coagulating sedimentation;

③ Setting an algae phase adjusting area, supplementing a carbon source, strengthening denitrification and reducing total nitrogen;

④ And a strengthening treatment area is arranged, and the water body is strengthened and purified through the floating island ecological wall.

Preferably, in the step ④, ecological communities on the ecological walls of the floating islands are utilized, and the effect of purifying the water body is achieved by utilizing plankton to digest sewage and photosynthesis of plankton.

Preferably, in the step ③, the algae phase adjusting area is provided with a submerged ecological purifying wall, so that the green algae competitiveness is enhanced and the growth of diatoms is inhibited.

Preferably, in the step ①, polyaluminium chloride PAC and polyacrylamide PAM are added into a flocculation reaction tank to be precipitated through a dosing device, after solid-liquid separation of the air floatation reaction tank, floating impurities are dehydrated and removed through a trash rack to a slag storage tank, and the slag is discharged by a slag discharge pump.

Preferably, the step ② is to periodically clean the formed flocculent precipitate and sludge, and pump the precipitate and sludge in the sedimentation-promoting tank to a sludge treatment point.

The invention has the beneficial effects that: the invention takes diatom as a main material, and inhibits the growth of diatom by treating water body, so that green algae becomes dominant population gradually.

Drawings

The invention is described in detail below with reference to the drawings and the detailed description;

FIG. 1 is a schematic illustration of the technical design of the present invention;

Fig. 2 is a schematic view of the process equipment arrangement of the present invention.

Description of the embodiments

The invention is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.

Referring to fig. 1-2, the present embodiment adopts the following technical scheme: the algae phase regulating method for the diatom accounting for the main body is realized through the following steps:

① And (3) flotation and purification: setting a first piece of area as a flotation purification area A, adding a flocculating agent into a water inlet of a front lake adjusting pond, diffusing the flocculating agent under water flow flushing to primarily precipitate massive impurities, and simultaneously adding an air floatation device 1 under the first piece of area to remove the floatable impurities through dehydration of a trash rack 2 after floating;

② And (3) promoting sedimentation and purification: setting a second block area as a sedimentation promoting and purifying area B, adding a flocculating agent to enable colloid particles to collide with each other to form flocculent coagulating sedimentation 3;

③ An algae phase adjusting area C is arranged, a carbon source is supplemented, denitrification is enhanced, total nitrogen is reduced, and green algae competitiveness is enhanced and diatom growth is inhibited by arranging a submerged ecological purifying wall 5 in the algae phase adjusting area;

④ The enhanced treatment area D is arranged, the water body is enhanced and purified through the floating island ecological wall 4, ecological communities on the floating island ecological wall 4 are utilized, and the effect of purifying the water body is achieved by utilizing plankton to absorb sewage and photosynthesis of phytoplankton.

It is noted that in the step ①, a flocculating agent is added into the flocculation reaction tank 7 to be precipitated by the chemical adding device 6, after the solid-liquid separation of the air floatation reaction tank 8, the floating impurities are dehydrated and removed by the trash rack 2 to the slag storage tank 9, and the slag is discharged by the slag discharge pump 10.

The flocculant adopts polyaluminum chloride PAC and polyacrylamide PAM, wherein the polyaluminum chloride PAC is used in coagulation and flocculation processes in water treatment, has strong flocculation capacity, can form large and compact floccules in a short time, is convenient for precipitation and filtration, and can effectively remove suspended matters, turbid matters and organic matters in water. The polyacrylamide PAM has good adsorptivity and precipitability, can adsorb suspended substances and colloid substances in water, so that the suspended substances and the colloid substances are aggregated into larger agglomerates, can promote the rapid precipitation of the suspended substances and the colloid substances, has good stability, is not easy to decompose, and can adapt to different water quality changes in a certain range. The polyaluminum chloride PAC and the polyacrylamide PAM are matched for use, so that the water treatment effect can be improved, the flocculation, precipitation and purification are combined with each other, the treatment efficiency is improved, and the water treatment device can be used for different water quality treatments.

In addition, the step ② is to periodically clean the flocculent precipitate 3 and the sludge, and connect the precipitate and the sludge in the sedimentation-promoting tank 11 to a sludge treatment point by a sludge discharge water pump 12.

The embodiment takes diatom as a main material, and the growth of the diatom is inhibited by treating the water body, so that the green algae becomes a dominant population gradually. The method adopts the flocculant to carry out flotation purification and sedimentation promotion purification, can effectively remove various suspended matters and impurities in water, reduces the turbidity of the water body, and can also effectively improve the transparency of the water body. The method also utilizes carbon source supplement to regulate algae phase so as to promote the growth and reproduction of green algae and reduce the quantity of diatom, thereby realizing the regulation of algae population. In addition, through the application of the floating island ecological wall, the water body can be purified in a strengthening way, organic matters and nutrient substances in the water can be decomposed effectively, and the eutrophication level in the water can be reduced, so that the effective improvement of the water quality can be realized.

The specific embodiment can find out the formation mechanism and influencing factors of the abnormal color of the front lake dry running water on one hand and establish algae phase regulating ecological engineering on the other hand through a series of steps of floatation, precipitation, algae phase regulation and strengthening treatment, and can digest pollutants in situ, regulate algae phases and improve water color. The method is suitable for water areas with slow water flow and serious accumulation of water pollutants, is also suitable for the situation that the competition of diatoms exceeds that of green algae due to silicon ions caused by water and soil loss, can effectively improve water quality, and can regulate algae population to transform the advantages of diatoms into green algae, so that the aim of eliminating water color is fulfilled, and the method has wide market application prospect.

The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The algae phase adjusting method for the diatom accounting for the main body is characterized by comprising the following steps of:

① And (3) flotation and purification: setting a first piece of area as a flotation purification area (A), adding a flocculating agent into a water inlet of a front lake adjusting pond, primarily precipitating massive impurities, and simultaneously adding an air floatation device (1) under the first piece of area to enable floatable impurities to float and then dehydrating and removing a trash rack (2);

② And (3) promoting sedimentation and purification: setting a second piece area as a sedimentation promoting and purifying area (B), and adding a flocculating agent to form flocculent coagulating sedimentation (3);

③ An algae phase adjusting area (C) is arranged, a carbon source is supplemented, and denitrification is enhanced to reduce total nitrogen;

④ And a strengthening treatment area (D) is arranged, and water is strengthened and purified through the floating island ecological wall (4).

2. The method for regulating the algal phase of diatom comprises the steps of claim 1, wherein the step ④ is to utilize ecological communities on the ecological walls (4) of the floating island and to utilize plankton to digest sewage and photosynthesis of phytoplankton to purify the water body.

3. The method for regulating algae phase of diatom comprises according to claim 1, wherein in step ③, algae phase regulating area is provided with a submerged ecological purifying wall (5), so as to enhance green algae competitiveness and inhibit diatom growth.

4. The algae phase adjusting method of the diatom comprises the steps of adding polyaluminium chloride PAC and polyacrylamide PAM into a flocculation reaction tank (7) through a dosing device (6) for precipitation, removing floating impurities through a trash rack (2) to a slag storage tank (9) after solid-liquid separation of an air floatation reaction tank (8), and discharging the floating impurities by a slag discharge pump (10).

5. The method according to claim 1, wherein the step ② is to periodically clean the flocculent precipitate (3) and sludge formed, and connect the precipitate and sludge in the sedimentation-promoting tank (11) to the sludge treatment point by a sludge discharge pump (12).