阅读说明：本技术 一种新型人工湿地运行方式及系统 (Novel constructed wetland operation mode and system ) 是由 严峰 于 2021-08-05 设计创作，主要内容包括：本发明涉及一种新型人工湿地运行方式及系统,包括以下步骤:(1)将污水进行过滤处理,去除水中悬浮颗粒；(2)将过滤后的污水进行曝气处理；(3)经过曝气处理的污水导入多级藻类反应塘中,在藻类反应塘的水面以下进行充氧操作,并提供光源保证藻类充分生长,吸收污水中的氮磷；(4)定期对藻类反应塘中的藻类和水生植物进行收割,收割后的藻类和水生植物与饵料混合作为饲料回收(5)对藻类反应塘中的出水进行消毒杀菌。利用藻类植物对营养元素的大量需求这一特性,对污水进行净化的同时,产出具有较大价值的藻类产品,既可以降低水处理成本,又可以增加生产副产品,实现污水处理中营养元素的资源化,是一种理想的水处理模式。(The invention relates to a novel artificial wetland operation mode and a system, comprising the following steps of (1) filtering sewage to remove suspended particles in the water; (2) carrying out aeration treatment on the filtered sewage; (3) introducing the sewage subjected to aeration treatment into a multi-stage algae reaction pond, carrying out oxygenation operation below the water surface of the algae reaction pond, providing a light source to ensure that algae grow fully and absorb nitrogen and phosphorus in the sewage; (4) the algae and the aquatic plants in the algae reaction pond are harvested regularly, and the harvested algae and the harvested aquatic plants are mixed with bait to be used as feed for recycling (5) the effluent in the algae reaction pond is disinfected and sterilized. By utilizing the characteristic that the algae plants have large demands on nutrient elements, the algae products with higher value are produced while the sewage is purified, so that the water treatment cost can be reduced, the production by-products can be increased, the resource utilization of the nutrient elements in the sewage treatment is realized, and the method is an ideal water treatment mode.)

1. A novel artificial wetland operation mode is characterized by comprising the following steps:

(1) filtering the sewage to remove suspended particles in the water;

(2) carrying out aeration treatment on the filtered sewage;

(3) introducing the sewage subjected to aeration treatment into a multi-stage algae reaction pond, carrying out oxygenation operation below the water surface of the algae reaction pond, providing a light source to ensure that algae grow fully and absorb nitrogen and phosphorus in the sewage;

(4) harvesting algae and aquatic plants in the algae reaction pond regularly, and mixing the harvested algae and aquatic plants with bait to be used as feed for recovery;

(5) and (4) disinfecting and sterilizing the effluent in the algae reaction pond.

2. The novel artificial wetland operation mode of claim 1, wherein the algae reaction pond is provided with an upper layer of aquatic plants and algae zone and/or a lower layer of aquatic plants and algae zone.

3. A novel constructed wetland system is characterized by comprising:

a suspended matter pretreatment system having a mechanical grate for filtering suspended matter;

a pretreatment homogenizing water tank, wherein an oxidation ditch and a sludge accumulation pump pit are arranged in the tank;

the multi-stage fixed algae pond is provided with a plurality of algae ponds connected in series, each algae pond is provided with an upper layer of aquatic plants and algae zone and/or a lower layer of aquatic plants and algae zone which are distributed up and down, and sewage flowing out of the pretreatment homogenization water tank flows into the corresponding algae pond step by step;

the algae harvester is arranged in the top of the algae pond in a guiding and sliding manner and is used for harvesting algae in the pond;

and the ultraviolet disinfection system is used for disinfecting the water leaving the multi-stage algae pond.

4. The novel constructed wetland system of claim 3, wherein the multistage algae pond comprises 3 primary algae ponds, secondary algae ponds, and tertiary algae ponds connected in series.

5. The novel constructed wetland system of claim 3, wherein the upper aquatic plant and algae zone is one or more of Eichhornia crassipes, Bombarus macrocephala, Amyda sinensis, Azalea sinensis, and Spirodela sophorae.

6. A novel artificial wetland system according to claim 3, wherein the lower aquatic plants and algae strips are one or more of eel grass, hornworts, watermifoil and hydrilla verticillata.

7. The novel constructed wetland system of claim 3, wherein the primary algae pond is completely implemented with a suspended plant system.

8. The novel constructed wetland system of any one of claims 3 to 7, wherein a barrier net for preventing plants from moving with water is arranged at intervals in each algae pond.

9. The novel artificial wetland system as claimed in any one of claims 3 to 7, wherein auxiliary illuminating lamps which are detachable in the up-down direction are arranged on the wall of the fixed algae pond.

10. The novel constructed wetland system of any one of claims 3 to 7, wherein the bottom of the algae pond is provided with an auxiliary oxygenation device.

Technical Field

The invention belongs to the field of sewage treatment, and particularly relates to a novel artificial wetland operation mode and a system.

Background

In the traditional sewage treatment process, nitrogen, phosphorus and the like are taken as pollution elements. In order to remove ammonia nitrogen in sewage, in the traditional sewage biochemical treatment process, the nitrification and denitrification principles are utilized to remove ammonia nitrogen in the sewageThe nutrient element ammonia nitrogen is converted into useless nitrogen to be released, and the carbon nitrogen ratio in the sewage is low (BOD/NH) in many times₃N), a large amount of organic substances such as methanol, glucose and the like have to be added artificially; in order to remove phosphorus, a sludge discharge method is adopted to transfer the surplus containing a large amount of phosphorus from sewage to surplus sludge, and the surplus sludge is mainly treated (incinerated, buried and the like). This treatment fails to utilize or eliminate these nutrients; fundamentally, the influence of phosphorus on the ecological environment cannot be eliminated.

Nitrogen and phosphorus in the sewage are pollutants from the perspective of conventional sewage treatment, are the main causes of water eutrophication, mass propagation of algae and water blackening and smelly, but are beneficial nutrient elements from the perspective of plant growth, and particularly can accelerate the growth of aquatic plants and algae.

According to the related literature, algae is an autotrophic organism, the growth of the algae has low requirement on nutrition in wastewater, and light energy is used as energy, and nutrient substances such as nitrogen, phosphorus and the like are utilized to synthesize complex organic matters. Therefore, the algae can reduce the content of nitrogen and phosphorus in the water body. The algae has fast growth speed, fast metabolism, fast adsorption and high purifying efficiency. Therefore, the purification of sewage by algae is becoming an important research direction in sewage treatment. In the prior art, patent document No. 2015103922481 discloses a method and an apparatus for treating sewage based on a water ecosystem, wherein the sewage is treated by a grid and a settling basin, then introduced into an algae reactor for reaction, then introduced into an algae-eating insect reactor, after reaction, algae-eating insects are separated, and finally the separated liquid is poured into an ecological treatment system containing aquatic animals, aquatic plants and microorganisms, and the treated sewage is discharged.

The above patent documents adopt the method of purifying water quality by algae-treating algae by algae eating algae, which has the following disadvantages: algae are not fully utilized; the decomposition and absorption rate of the algae in the reactor to nitrogen and phosphorus in the sewage cannot be ensured. Based on the above problems, a new wetland treatment system needs to be developed.

Disclosure of Invention

The invention provides a novel constructed wetland operation mode and a novel constructed wetland operation system, which aim to solve the problem that the decomposition rate of nitrogen and phosphorus in sewage treated by algae in the prior art cannot be ensured.

The novel artificial wetland operation mode adopts the following technical scheme: a novel artificial wetland operation mode comprises the following steps:

(1) filtering the sewage to remove suspended particles in the water;

(2) carrying out aeration treatment on the filtered sewage;

(3) introducing the sewage subjected to aeration treatment into a multi-stage algae reaction pond, carrying out oxygenation operation below the water surface of the algae reaction pond, and providing sufficient light source to ensure that the algae fully decompose nitrogen and phosphorus in the sewage;

(4) harvesting algae and aquatic plants in the algae reaction pond regularly, and mixing the harvested algae and aquatic plants with bait to be used as feed for recovery;

(5) and (4) disinfecting and sterilizing the effluent in the algae reaction pond.

As an improvement, an upper layer of aquatic plants and algae zone and/or a lower layer of aquatic plants and algae zone are arranged in the algae reaction pond.

The novel artificial wetland system adopts the following technical scheme. A novel constructed wetland system comprising:

a suspended matter pretreatment system having a mechanical grate for filtering suspended matter;

a pretreatment homogenizing water tank, wherein an oxidation ditch and a sludge accumulation pump pit are arranged in the tank;

the multi-stage algae pond is provided with a plurality of algae ponds connected in series, each algae pond is provided with an upper layer of aquatic plants and algae belts and/or a lower layer of aquatic plants and algae belts which are distributed up and down, and sewage flowing out of the pretreatment homogenization water tank flows into the corresponding algae pond step by step;

the algae harvester is arranged in the algae pond in a guiding and sliding manner and is used for harvesting the algae in the pond;

and the ultraviolet disinfection system is used for disinfecting the water leaving the multi-stage algae pond.

As an improvement, the multi-stage algae pond comprises a first-stage algae pond, a second-stage algae pond and a third-stage algae pond which are connected in series.

As an improvement, the upper layer aquatic plant and algae zone is one or more of water hyacinth, giant knotweed, water turtle, azolla imbricata and duckweed.

As an improvement, the lower layer aquatic plants and the algae belts are one or more of tape grass, hornwort, watermifoil and hydrilla verticillata.

As an improvement, the first class algal pond employs a suspended plant system entirely as an improvement.

As an improvement, blocking nets for preventing plants from moving along with water are arranged in each algae pond at intervals.

As an improvement, an auxiliary illuminating lamp which can be disassembled along the up-down direction is arranged on the pool wall of the algae pool.

As an improvement, the bottom of the algae pond is provided with an auxiliary oxygenation device.

The invention has the beneficial effects that:

the invention provides a novel artificial wetland operation mode, which comprises the following steps of (1) filtering sewage to remove suspended particles in the sewage; (2) carrying out aeration treatment on the filtered sewage; (3) introducing the sewage subjected to aeration treatment into a multi-stage algae reaction pond, carrying out oxygenation operation below the water surface of the algae reaction pond, and providing a light source to ensure that algae fully grow and absorb and decompose nitrogen and phosphorus in the sewage; (4) the aquatic plants and the algae in the reaction pond are harvested at regular intervals, and the harvested aquatic plants, the algae and the bait are mixed to be used as feed for recycling (5) the effluent in the algae reaction pond is disinfected and sterilized. By utilizing the characteristic that the algae plants have large demands on nutrient elements, the algae products with higher value are produced while the sewage is purified, so that the water treatment cost can be reduced, the production by-products can be increased, the resource utilization of the nutrient elements in the sewage treatment is realized, and the method is an ideal water treatment mode.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a specific embodiment of a novel artificial wetland operation system of the invention;

fig. 2 is a sectional view of an embodiment of an algae pond of the novel constructed wetland operation system of the invention;

reference numerals:

1. the device comprises a pretreatment homogenizing water pool, 11, a sludge accumulation pump pit, 2, a first-stage algae pond, 21, an initial-end oxygenating device, 3, a second-stage algae pond, 31, a middle oxygenating device, 4, a third-stage algae pond, 41, a tail-end inflating device, 5, an algae harvester, 6, an auxiliary illuminating lamp, 7, an auxiliary oxygenating device, 8, water inlet, 9 and water outlet.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention can be embodied in many different forms than those herein described and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit and scope of the invention and, therefore, the invention is not to be limited to the embodiments set forth herein.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The embodiment of the novel artificial wetland operation mode comprises the following steps:

(1) filtering the sewage to remove suspended particles in the water; (2) carrying out aeration treatment on the filtered sewage; (3) introducing the sewage subjected to aeration treatment into a multi-stage algae reaction pond, carrying out oxygenation operation below the water surface of the algae reaction pond, and providing a light source to ensure that algae fully grow and absorb nitrogen and phosphorus in the sewage; (4) harvesting the aquatic plants and the algae in the reaction pond at regular intervals, and mixing the harvested aquatic plants and the algae with bait to be used as feed for recycling; (5) and (4) disinfecting and sterilizing the effluent in the algae reaction pond.

The algae is harvested regularly, so that a growth space can be provided for the new algae in time, nitrogen and phosphorus in the sewage are decomposed at an accelerated speed, and meanwhile, the harvested algae is used as a feed, so that a byproduct generated in sewage treatment is solved.

The algae reaction pond is provided with an upper layer of aquatic plants and algae zone and/or a lower layer of aquatic plants and algae zone.

The embodiment of the novel artificial wetland system comprises a suspended matter pretreatment system, a pretreatment homogenization water tank 1, a multistage algae pond, an algae harvester 5 and an ultraviolet disinfection system.

Suspension pretreatment systems have mechanical grates for filtering the suspension, and specifically, mechanical grates include coarse and fine grates for treating excess suspension, reducing system turbidity, and facilitating light transmission.

The pretreatment homogenizing water tank 1 is internally provided with an oxidation ditch and a sludge accumulation pump pit and is used for carrying out aeration treatment on sewage.

The multi-stage algae pond is provided with a plurality of algae ponds which are connected in series, please refer to an arrow mark in figure 1, sewage flows in the algae ponds in an S-shaped flow direction, each algae pond is provided with an upper layer of aquatic plants and an algae zone and/or a lower layer of aquatic plants and algae zone which are distributed up and down, and sewage flowing out of the pretreatment homogenizing water tank 1 flows into the corresponding algae pond step by step; specifically, the multi-stage algae pond in the embodiment comprises 3 first-stage algae ponds 2, second-stage algae ponds 3 and third-stage algae ponds 4 which are connected in series; wherein the first class algae pond 2 completely adopts a suspended plant system.

The bottom of the algae pond is provided with an auxiliary oxygenation device, and specifically, in the facility example, a first-stage algae pond 2 is provided with an initial-end oxygenation device 21, a second-stage algae pond 3 is provided with a middle oxygenation device 31, and a third-stage algae pond 4 is provided with a tail-end aeration device 41. An auxiliary oxygen charging device is arranged to improve the dissolved oxygen in water and prevent the water body from smelling.

The algae harvester 5 is slidably guided in the algae pond and used for harvesting algae in the pond, specifically, a guide rail is arranged on a pond wall of the algae pond and used for driving the algae harvester 5 to do linear motion along the guide rail, the algae harvester 5 is the prior art in the field, and the structure and the principle are not described again.

And the ultraviolet disinfection system is used for disinfecting the water quality leaving the third-level algae pond 4, and meeting the requirements of three types of water and four types of water on the ground after disinfection.

In this embodiment, the upper aquatic plant and algae zone is one or more of Eichhornia crassipes, Daboea, Amyda sinensis, Azalea sinensis, and Spirodela robinifolius, and all of the above plants are free floating plants, and mainly have the effects of homogenizing water quality and pre-settling.

In this embodiment, the lower layer aquatic plant and algae zone are one or more of eel grass, goldfish algae, watermifoil algae and hydrilla verticillata, all of which belong to submerged plants, roots and stems of submerged aquatic plants are grown in mud, the whole plant is submerged, and flower stalks and flowers are exposed to the water only during flowering. Has developed ventilation tissue, and is favorable for gas exchange. The leaves are mostly long and narrow or filamentous, can absorb partial nutrients in water, and can normally grow and develop under the condition of underwater weak light. Because the submerged plants can absorb the nutrients in the water body, including nitrogen, phosphorus and the like, in the growing process. Aiming at eutrophic lakes and wetlands, excessive nutrient substances in the water body can be transferred in a mode of harvesting submerged plants in a planned way every year, and the method plays a positive role in relieving the eutrophication of the water body.

The first-stage algae pond 2 in the embodiment completely adopts a suspended plant system, and the second-stage algae pond 3 and the third-stage algae pond 4 are both provided with an upper layer of aquatic plants and algae belts and a lower layer of aquatic plants and algae belts; and blocking nets for preventing plants from moving along with water are arranged in each algae pond at intervals.

The bottom of the algae pond is provided with a plant attachment layer which comprises a sand stone layer, a sand soil layer and a gravel layer, and the plant attachment layer can provide attachments for the rhizomes of the submerged plants.

An auxiliary illuminating lamp 6 which can be disassembled along the up-down direction is arranged on the pool wall of the algae pool. The effective depth of the algae treatment system is improved by adopting low-voltage direct current.

The novel artificial wetland system provided by the invention also comprises a fishpond, wherein the fishpond is used for feeding the algae harvested by the rail-type harvester into fish in the fishpond; the novel artificial wetland system provided by the invention also comprises an ornamental plant pond, and the disinfected water is introduced into the ornamental plant pond, so that the artificial wetland is combined with the landscape water body, the design integrating natural action, artificial action and integration is developed, the design of the traditional sewage treatment plant type is avoided, the ecological treatment and the resource treatment of the water body are realized, and the sewage treatment process with green, sustainable development and low energy consumption is embodied.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.