CN-121990688-A - Reinforced modularized constructed wetland system and control method thereof

CN121990688ACN 121990688 ACN121990688 ACN 121990688ACN-121990688-A

Abstract

The application relates to the technical field of wetlands, in particular to an enhanced modularized constructed wetland system and a control method thereof, wherein the enhanced modularized constructed wetland system comprises a plurality of constructed wetland units which are connected in sequence; the two adjacent constructed wetland units are connected in a baffling way. The application forms a synergistic purification mechanism for effectively removing pollutants step by step through physical interception and adsorption of upper zeolite, continuous disturbance of aquatic organisms in light filler and ecological digestion of the bottom, and constructs a dynamic anti-blocking system together, thereby obviously delaying blocking of the filler layer and attenuation of hydraulic performance; meanwhile, the biological capturing device integrated in the system realizes directional regulation and recycling of biomass, solves the problem of easy unbalance of organisms in an ecological system, and finally, the system realizes the collaborative promotion of sewage treatment efficiency, long-term operation stability and ecological self-maintenance capability on the premise of not depending on external high-energy consumption equipment.

Inventors

WEI JUN
KONG LINGWEI
LI LING
CHENG SHUIPING
LI SILIANG
GENG LILI
Huang Senjun

Assignees

中国电建集团华东勘测设计研究院有限公司
西湖生态环境(杭州)有限公司

Dates

Publication Date: 20260508
Application Date: 20251118

Claims (10)

1. An enhanced modular constructed wetland system comprising: the system comprises a plurality of constructed wetland units, two adjacent constructed wetland units, a plurality of water treatment units and a plurality of water treatment units, wherein the constructed wetland units are sequentially connected; each constructed wetland unit comprises an upper layer filler zone, a middle layer functional zone and a bottom non-filler zone which are sequentially arranged from top to bottom, wherein a water permeable isolation layer is arranged between the upper layer filler zone and the middle layer functional zone; aquatic organisms are added into the middle layer functional area and the bottom non-filling area; The biological capturing device is arranged in the constructed wetland unit and is used for directionally attracting and quantitatively capturing the aquatic organisms in the middle-layer functional area and/or the bottom non-filling area through bait throwing.
2. The system of claim 1, wherein the biological capture device comprises: The first pipe fitting is vertically arranged and penetrates through the upper filler area and the water permeable isolation layer, and the lower end of the first pipe fitting extends to the bottom of the middle functional area; The second pipe fitting is horizontally arranged in the middle layer filling area and is communicated with the bottom of the first pipe fitting; And the catching pipe is detachably inserted into the first pipe fitting, and is used for directionally attracting and catching the aquatic organisms by throwing baits.
3. The system of claim 2, wherein the pipe wall of the second pipe is provided with a water inlet hole, and the bottom of the capturing pipe is provided with a plug with a through hole, and when the capturing pipe is inserted into the first pipe, the capturing pipe is communicated with the second pipe through the through hole.
4. The system of claim 2, wherein the opening ratio of the water inlets on the first tube and the tube is maintained at 20% -30%.
5. The system according to claim 1, wherein an openable and closable throwing port is provided at a position of the side wall of the constructed wetland unit corresponding to the middle-layer functional area, for throwing or replacing the aquatic organisms into or into the middle-layer functional area.
6. The system of claim 5, wherein the aquatic organisms include a first type of aquatic organisms that are dosed into the middle functional zone and a second type of aquatic organisms that are dosed into the non-packed zone.
7. The system of claim 1, further comprising a combination of plants including calamus, zizania, reed and zizania latifolia.
8. The system according to claim 2 or 3, wherein the non-filling area at the bottom of the constructed wetland unit is provided with a dissolved oxygen sensor, the system further comprises a water pump connected with a water source and/or an aeration device arranged in the wetland unit, and the dissolved oxygen sensor, the water pump and the aeration device are in signal connection with a control unit.
9. A control method of an enhanced modular constructed wetland system, wherein the method is applied to the system as claimed in any one of claims 1 to 8, and the method comprises: Obtaining a first dissolved oxygen concentration of the bottom non-packed region; And if the first dissolved oxygen concentration is smaller than a preset threshold value, increasing the opening of the water pump.
10. The method of claim 9, further comprising, after the step of increasing the opening of the water pump if the first dissolved oxygen concentration is less than a preset threshold: After a preset time delay, obtaining a second dissolved oxygen concentration of the bottom non-filling area; And if the second dissolved oxygen concentration is still greater than the preset threshold value, controlling the aeration device to increase the running power and/or reducing the opening of the water pump.

Description

Reinforced modularized constructed wetland system and control method thereof Technical Field The invention relates to the technical field of wetlands, in particular to an enhanced modular constructed wetland system and a control method thereof. Background As an ecological friendly sewage treatment technology, the constructed wetland is widely applied to the fields of polluted river and lake restoration, non-point source pollution control, advanced treatment of tail water of sewage plants and the like due to the advantages of low operation cost, simple management and the like. The modular constructed wetland (MMB-CWs) further improves the standardization degree and the site adaptability of the system, and is an important technical direction for realizing the 'low carbon-pollution reduction-synergy' cooperative target. However, the traditional and existing modularized artificial wetland still has a plurality of common technical bottlenecks in engineering practice, and the large-scale popularization and application of the traditional and existing modularized artificial wetland are restricted. First, insufficient resistance to clogging is a critical issue. After the system is operated for a long time, the porosity of the traditional filler (such as gravel and sand) is obviously reduced due to suspended matter deposition and excessive growth of biological films, so that the hydraulic conductivity is attenuated, dredging maintenance is frequent, and the operation cost is increased. Secondly, the system functions tend to be single, most designs focus on pollutant purification only, fail to effectively integrate the cooperative process of sewage purification-biological resource utilization, and lack economic output to realize wet-keeping. Thirdly, the difficulty of biological regulation is high, although benthonic organisms, fishes and other activities can strengthen mass transfer through disturbance, the lack of effective directional capture and biomass control design is easy to cause biomass runaway, and the purification efficiency is inhibited. In addition, the efficiency attenuation is obvious in a low-temperature environment, the reoxygenation capacity and the microbial activity of the system are reduced after plants wilt in winter, the removal rate of pollutants such as COD, total nitrogen and the like is obviously reduced by 20-30% in comparison with summer, and the operation stability is poor. To address the challenges described above, the prior art has mostly employed a single optimization strategy. For example, patent CN116332347B focuses on the optimal combination of packing layers to improve filtration performance, and patent CN214004197U attempts to introduce a single biological species for regulation. However, these schemes fail to systematically integrate the core elements of layered filler structure optimization, multi-species biological directional disturbance and capture, economic plant configuration, etc., forming a mechanism of synergistic reinforcement, so it is difficult to fundamentally solve systematic problems of blockage, single function, seasonal performance fluctuation, etc. Disclosure of Invention In view of the above, the present invention aims to provide an enhanced constructed wetland module system and a control method thereof, which can improve the pollutant purification efficiency and anti-blocking capability through the deep coupling of the structure and the ecological process, and realize the resource recovery and the low-carbon operation. In a first aspect, an embodiment of the present invention provides an enhanced modular constructed wetland system, including: The system comprises a plurality of constructed wetland units, two adjacent constructed wetland units, a plurality of water treatment units and a plurality of water treatment units, wherein the constructed wetland units are sequentially connected; Each constructed wetland unit comprises an upper layer filler zone, a middle layer functional zone and a bottom non-filler zone which are sequentially arranged from top to bottom, wherein a water permeable isolation layer is arranged between the upper layer filler zone and the middle layer functional zone; aquatic organisms are added into the middle layer functional area and the bottom non-filling area; the biological capturing device is arranged in the constructed wetland unit and is used for directionally attracting and quantitatively capturing aquatic organisms in the middle layer functional area and/or the bottom non-filling area through bait throwing. With reference to the first aspect, the biological capture apparatus includes: the first pipe fitting is vertically arranged and penetrates through the upper filler area and the water permeable isolation layer, and the lower end of the first pipe fitting extends to the bottom of the middle functional area; The second pipe fitting is horizontally arranged in the middle layer filling area and is communicated with the bottom of