CN115974284A - A sewage treatment method based on ecological floating island coupling mud-water separation tank - Google Patents

Abstract

The invention discloses a sewage treatment method based on ecological floating island coupling mud-water separation pools, which comprises the following steps: building multiple mud-water separation pools, cultivating ecological floating islands, and finally building multiple ecological floating island coupling mud-water separation pools; The final sewage is injected into the ecological floating island coupling mud-water separation tank for mud-water separation; the settled sludge is collected by the sludge bucket at the bottom, and is discharged after collection for the next step of treatment. The clear water after the upper mud-water separation is diverted to the next treatment process . The present invention adopts the ecological floating island technology to organically couple the sedimentation tank, and at the same time creatively plant the floating island on the surface of the sedimentation tank, and use the huge root system of the aquatic plant as a filter to trap the floating mud that may float up from the bottom of the sedimentation tank, and the aquatic plants can quickly The growth effectively consumes the residual organic matter, ammonia nitrogen and total phosphorus in the water body, and plays the role of auxiliary degradation.

Description

A sewage treatment method based on ecological floating island coupling mud-water separation tank

technical field

The invention relates to the technical field of sewage treatment, in particular to a sewage treatment method based on an ecological floating island coupling mud-water separation tank.

Background technique

In the field of sewage treatment, the sedimentation tank after biological treatment is usually called the secondary sedimentation tank or the final sedimentation tank. The function of the secondary sedimentation tank is to separate mud and water, clarify the mixed solution, concentrate the sludge and return the separated sludge to the biological treatment Section, its effect is good or bad, directly affects the water quality of the effluent and the concentration of the return sludge. If the sedimentation and concentration effect is not good, the activated sludge suspended matter will increase in the effluent, thereby increasing the BOD mass concentration of the effluent; at the same time, the concentration of the returning sludge will also decrease, thereby reducing the concentration of the mixed solution in the aeration tank and affecting the purification effect . The main factors affecting the effect of the secondary settling tank are: the quality of the front-end sludge, the way of sedimentation, the auxiliary effect of coagulant and flocculant, etc. Among them, the way of precipitation plays a crucial role.

In the prior art, sedimentation treatment can be divided into three forms: 1. Natural sedimentation: solid particles in the water do not change in size, shape and density during the sedimentation process, such as pre-sedimentation for water with high sediment content, which belongs to Natural sedimentation; 2. Coagulation sedimentation: the precipitation process in which solid particles in water change size, shape and density due to mutual contact and coagulation is called coagulation sedimentation; The process of crystallization or deposition of impurities is called chemical precipitation. The three methods are used alone or in combination. However, the effect is always unsatisfactory, and there is still a large room for progress. To this end, we propose a sewage treatment method based on an ecological floating island coupling mud-water separation tank.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the existing defects, provide a sewage treatment method based on the ecological floating island coupling mud-water separation tank, adopt the ecological floating island technology to organically couple the sedimentation tank, and at the same time creatively plant the floating island to the sedimentation tank On the surface of the pool, the huge root system of aquatic plants is used as a filter to trap the floating mud that may float up from the bottom of the sedimentation tank. The rapid growth of aquatic plants can effectively consume the residual organic matter, ammonia nitrogen and total phosphorus in the water body, and play an auxiliary role in degradation. The problems in the background technology can be effectively solved.

In order to achieve the above object, the present invention provides the following technical solution: a sewage treatment method based on an ecological floating island coupling mud-water separation tank, comprising the following steps:

S1. Build multiple mud-water separation tanks, cultivate ecological floating islands, and finally build multiple ecological floating island-coupled mud-water separation tanks;

S2. Inject the biologically treated sewage into the ecological floating island coupling mud-water separation tank for mud-water separation, realize the precipitation of particulate matter in the sewage through the sedimentation component in the middle, and realize the decomposition of organic matter in the water body through the upper ecological floating island;

S3. The settled sludge is collected by the sludge hopper at the bottom, and then discharged for the next step of treatment. The clear water after the separation of the upper layer of mud and water is diverted to the next treatment process.

Further, the ecological floating island coupling mud-water separation tank includes a sedimentation tank, a storage basket, a water retaining assembly, a bracket and an inclined sedimentation piece, a bracket for providing support is provided in the middle of the sedimentation tank, and a Settling assembly, the settling assembly is installed obliquely, and the through holes for water circulation are evenly arranged on the support, and the upper support is provided on the upper part of the settling tank, and the two ends of the upper support are connected with the inner wall of the settling tank, and the upper support is provided with There are several water retaining components, and several storage baskets are arranged between adjacent water retaining components. The lower part and bottom of the storage baskets are hollowed out, and aquatic plants are arranged inside, and several sludge hoppers are arranged at the bottom of the sedimentation tank.

Further, one or more floating blocks are arranged between the storage baskets, and the floating blocks are used to isolate the storage baskets and prevent the storage baskets from approaching under the action of the water flow.

Further, the aquatic plants set in the storage basket are canna or orchid, and these aquatic plants have well-developed root systems, and the filter screen formed by interweaving the roots intercepts the floating mud that may float up from the bottom of the sedimentation tank.

Furthermore, the ecological floating islands composed of multiple upper brackets and storage baskets are displayed in the sedimentation tank, which are evenly distributed and the sedimentation effect is better.

Further, the water retaining component is a water retaining plate or an outlet weir, and the water retaining component effectively intercepts the floating objects dropped due to the growth of plants, reducing or preventing the floating objects from affecting the water quality. floating object.

Further, the settling component is set at 120-160 degrees to the horizontal plane, and the inclined setting is conducive to the impact of the water flow on the settling component to form a turbulent flow, so that the particles in the water flow collide with each other, and the small particles become large particles, and then settle down.

Further, the settling component is set at an angle of 135 degrees to the horizontal plane.

Further, the settling component is an inclined tube or an inclined plate.

Further, the bottom of the bracket is 1.0-1.5m away from the upper surface of the sludge hopper, leaving enough space for sufficient sedimentation.

Compared with the prior art, the beneficial effect of the present invention is that the sewage treatment method based on the ecological floating island coupling mud-water separation tank has the following advantages:

1. The present invention adopts the ecological floating island technology to organically couple the sedimentation tank, and at the same time creatively plant the floating island on the surface of the sedimentation tank. The huge root system of aquatic plants can be effectively used as a filter to trap the floating mud that may float up from the bottom of the sedimentation tank , the rapid growth of aquatic plants effectively consumes the residual organic matter, ammonia nitrogen and total phosphorus in the water body, and plays the role of auxiliary degradation;

2. The present invention arranges water retaining components around the ecological floating island, which effectively intercepts floating objects falling due to plant growth, and reduces or eliminates floating objects affecting water quality; setting sedimentation components facilitates the impact of water flow on the sedimentation components to form turbulent flow, which is convenient to use Particles in the water stream collide with each other, small particles become large particles, and then settle down.

3. The precipitation effect of the present invention is good, the wastewater treatment efficiency is 30% higher than that of other precipitation methods, and the cost is saved by about 35%.

Description of drawings

Fig. 1 is a structural schematic diagram of an ecological floating island coupling mud-water separation tank in the present invention.

In the figure: 1 sedimentation tank, 2 storage baskets, 3 upper brackets, 4 water retaining components, 5 brackets, 6 sedimentation components, 7 sludge hoppers.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Figure 1. This embodiment provides a technical solution: a sewage treatment method based on an ecological floating island coupling mud-water separation tank, including the following steps:

S1. Build multiple mud-water separation tanks, cultivate ecological floating islands, and finally build multiple ecological floating island-coupled mud-water separation tanks;

S2. Inject the biologically treated sewage into the ecological floating island coupling mud-water separation tank for mud-water separation, realize the precipitation of particulate matter in the sewage through the sedimentation component in the middle, and realize the decomposition of organic matter in the water body through the upper ecological floating island;

S3. The settled sludge is collected by the sludge hopper at the bottom, and then discharged for the next step of treatment. The clear water after the separation of the upper layer of mud and water is diverted to the next treatment process.

Sedimentation tank 1, storage basket 2, upper bracket 3, water retaining component 4, bracket 5, sedimentation component 6, sludge bucket 7

As one of the embodiments, the ecological floating island coupling mud-water separation tank includes a sedimentation tank 1, a storage basket 2, a water retaining assembly 4, a bracket 5 and an inclined sedimentation piece 6, and the middle part of the sedimentation tank 1 is provided with a bracket 5 that provides support. A settling assembly 6 is arranged above the support 5, and the settling assembly 6 is arranged obliquely. Through holes for water circulation are evenly arranged on the support 5. An upper support 3 is arranged on the upper part of the settling tank 1, and the two ends of the upper support 3 are connected with the inner wall of the settling tank 1. The upper bracket 3 is provided with several water retaining components 4, and several storage baskets 2 are arranged between adjacent water retaining components 4. The lower part and the bottom of the storage basket 2 are hollowed out, and aquatic plants are arranged inside, and some sewage plants are arranged at the bottom of the sedimentation tank 1. mud bucket7.

Wherein, one or more floating blocks are arranged between the storage baskets 2, and the floating blocks are used to cut off the storage baskets 2 and prevent the storage baskets 2 from approaching under the action of the water flow.

As one of the embodiments, two floating blocks are arranged between the storage baskets 2 .

Wherein, the aquatic plants that are set in the storage basket 2 are cannas or orchids. These aquatic plants have well-developed root systems, and the filter screen formed by interweaving the roots intercepts the floating mud that may float up from the bottom of the sedimentation tank.

As one of the embodiments, the aquatic plants arranged in the storage basket 2 are cannas.

As one of the embodiments, the ecological floating islands composed of a plurality of upper brackets 3 and storage baskets 2 are arranged and distributed in the sedimentation tank 1, and the distribution is even and the sedimentation effect is better.

As one of the embodiments, ecological floating islands are distributed around the sedimentation tank 1 .

As one of the embodiments, the water retaining component 4 is a water retaining plate or a water outlet weir, and the water retaining component 4 effectively intercepts the floating objects falling due to the growth of plants, so as to reduce or prevent the floating objects from affecting the water quality, and the water retaining component 4 is conducive to collecting plants Grows floating objects that fall.

Among them, the settling component 6 is set at 120-160 degrees to the horizontal plane, and the inclined setting is conducive to the impact of the water flow on the settling component 6 to form a turbulent flow, which is convenient for the particles in the water flow to collide with each other, and the small particles become large particles, and then settle down.

As one of the embodiments, the settling component 6 is set at an angle of 135 degrees to the horizontal plane.

As one of the embodiments, the settling component 6 is an inclined tube or an inclined plate.

As one of the embodiments, the bottom of the support 5 is 1.0-1.5m away from the upper surface of the sludge hopper 7, leaving enough space to allow sufficient sedimentation.

The working principle of the sewage treatment method based on the ecological floating island coupling mud-water separation tank provided by the present invention is as follows: the present invention adopts the ecological floating island technology to organically couple the sedimentation tank, and at the same time creatively plant the floating island on the surface of the sedimentation tank, and place the basket 2. The upper bracket 3 and the water retaining component 4 constitute an ecological floating island. The ecological floating island aims at the eutrophic water quality and uses the principle of ecological engineering to degrade the content of COD, nitrogen and phosphorus in the water. It takes aquatic plants as the main body, uses the principle of soilless cultivation technology, uses polymer materials as the carrier and substrate, applies the symbiotic relationship between species, makes full use of the water body space niche and nutrient niche, so as to establish an efficient artificial ecosystem for Reduce the pollution load in water bodies. It can greatly improve the transparency of the water body, and at the same time, the water quality index has also been effectively improved, especially for the inhibition of algae. The main effect of ecological floating islands on water purification is to use the roots of plants to absorb eutrophication substances in the water, such as total phosphorus, ammonia nitrogen, organic matter, etc., so that the nutrients in the water body can be transferred, and the water body can be reduced due to closed or insufficient self-circulation. Odor and eutrophication of water body. Artificially enhanced aquatic plants such as ecological floating islands can effectively degrade pollutants in water, such as COD, ammonia nitrogen, total phosphorus, etc., and have the characteristics of low treatment cost.

Using the huge root system of aquatic plants as a filter to trap the floating mud that may float up from the bottom of the sedimentation tank, the rapid growth of aquatic plants can effectively consume the residual organic matter, ammonia nitrogen and total phosphorus in the water, and play an auxiliary role in degradation. A settling component 6 is arranged under the ecological floating island, which is beneficial for the impact of the water flow on the settling component to form turbulent flow, so that the particles in the water flow collide with each other, and the small particles become large particles, and then settle down. Due to the action of gravity, the particle sediment will be deposited in the sludge hopper 7, and at the same time, the sludge under the sludge hopper 7 will be naturally compressed due to the action of gravity. The invention has good precipitation effect, high sewage treatment efficiency and lower cost.

The above is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process conversion made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technologies fields, all of which are equally included in the scope of patent protection of the present invention.

Claims (9)

1. A sewage treatment method based on an ecological floating island coupling mud-water separation tank, characterized in that: Include the following steps: S1. Build multiple mud-water separation tanks, cultivate ecological floating islands, and finally build multiple ecological floating island-coupled mud-water separation tanks; S2. Inject the biologically treated sewage into the ecological floating island coupling mud-water separation tank for mud-water separation; S3. The settled sludge is collected by the sludge hopper at the bottom, and then discharged for the next step of treatment. The clear water after the separation of the upper layer of mud and water is diverted to the next treatment process. 2. A sewage treatment method based on an ecological floating island coupling mud-water separation tank according to claim 1, characterized in that: the ecological floating island coupling mud-water separation tank includes a sedimentation tank (1) and a storage basket (2) , a water retaining assembly (4), a bracket (5) and an inclined sedimentation piece (6), the middle part of the sedimentation tank (1) is provided with a bracket (5) that provides support, and the top of the bracket (5) is provided with a sedimentation component (6), the settling component (6) is arranged obliquely, and through holes for water circulation are evenly arranged on the support (5), and an upper support (3) is provided on the upper part of the settling tank (1), and the upper support (3) Both ends are connected to the inner wall of the sedimentation tank (1), and several water retaining components (4) are arranged on the upper bracket (3), and several storage baskets (2) are arranged between adjacent water retaining components (4) , the lower part and bottom of the storage basket (2) are hollowed out, and aquatic plants are arranged inside, and several sludge hoppers (7) are arranged at the bottom of the sedimentation tank (1). 3. A sewage treatment method based on an ecological floating island coupling mud-water separation tank according to claim 2, characterized in that: one or more floating blocks are arranged between the storage baskets (2). 4. A sewage treatment method based on an ecological floating island coupling mud-water separation tank according to claim 2, characterized in that: the aquatic plants arranged in the storage basket (2) are canna or orchid. 5. A sewage treatment method based on ecological floating island coupling mud-water separation tank according to claim 2, characterized in that: the ecological floating islands composed of a plurality of upper brackets (3) and storage baskets (2) are arranged and distributed in the sediment Inside the pool (1). 6. A sewage treatment method based on an ecological floating island coupling mud-water separation tank according to claim 2, characterized in that: the water retaining component (4) is a water retaining plate or an outlet weir. 7. A sewage treatment method based on an ecological floating island coupling mud-water separation tank according to claim 2, characterized in that: the settling component (6) is set at an angle of 120-160 degrees to the horizontal plane. 8. A sewage treatment method based on an ecological floating island coupling mud-water separation tank according to claim 7, characterized in that: the settling component (6) is set at an angle of 135 degrees to the horizontal plane. 9. A sewage treatment method based on an ecological floating island coupling mud-water separation tank according to claim 2, characterized in that: the settling component (6) is an inclined tube or an inclined plate.

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