Ecological Slope Protection with Filter Pool for Water Purification
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Solution Overview
Problem
China's water bodies face significant pollution from non-point source discharges, with high levels of nitrogen and phosphorus exceeding environmental capacity, leading to eutrophication and degraded water quality, necessitating effective methods for reducing basin sewage pollution.
Innovation Solution
A novel ecological slope protection system with a flexible mattress and an ecological filter pool, utilizing layered fillers and microorganisms, including earthworms and bacteria, to treat sewage and reduce eutrophication, integrated with aeration and modular design for efficient pollutant removal and biodiversity enhancement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional sewage treatment methods are used, then pollutant removal efficiency is improved, but land occupation and construction cost increase
Solution Approach 1:
The invention transitions from traditional horizontal land-based treatment to a vertical three-dimensional structure by extending the ecological slope protection body into the water body. This allows sewage treatment to occur in the vertical space along the riverbank, significantly reducing land occupation while maintaining treatment capacity through multi-layer filler arrangements and submerged treatment zones.
Solution Approach 2:
The ecological slope protection structure serves multiple functions simultaneously: it acts as both a slope protection engineering measure and a sewage treatment system. The same structure that prevents bank erosion also treats sewage through its filler layers and microbial communities, eliminating the need for separate treatment facilities and reducing overall land use.
2Productivity
If complex ecological treatment systems are constructed, then water purification efficiency is improved, but device complexity and maintenance difficulty increase
Solution Approach 1:
The treatment system is divided into distinct functional layers within the filler material, including organic filler layers for physical filtration, inorganic filler layers for chemical adsorption, and microbial layers for biological degradation. This segmentation allows each layer to perform its specific function efficiently while simplifying the overall system design and maintenance through modular construction.
Solution Approach 2:
The system utilizes natural ecological processes where microbial communities, plants, and fillers work together autonomously to purify sewage. The ecological filter pool creates a self-sustaining environment where organisms degrade pollutants and regenerate, reducing the need for complex mechanical systems and external maintenance interventions.
3Productivity
If aerobic treatment is enhanced, then organic pollutant removal is improved, but oxygen supply requirements and energy consumption increase
Solution Approach 1:
The system replaces mechanical aeration systems with natural oxygen transfer processes. Oxygen is supplied through diffusion from the air-water interface and root aeration from plants, eliminating the need for energy-consuming blowers or aerators while maintaining effective aerobic degradation of organic pollutants through naturally occurring microbial processes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively reduces pollutant levels, improves water quality, and is cost-effective with low land occupation and easy maintenance, achieving 50%-80% removal of suspended particulates, chemical oxygen demand, and 30%-70% removal of phosphorus and nitrogen, while promoting biodiversity.
Implementation Method 1
the filler layer is supported by the support layer 125; the sewage is introduced into the ecological filter pool 120 and treated by the filler layer to clean up pollutants therein
Implementation Method 2
an ecological water treatment system with microorganisms, plants, animals and fillers as main elements can be created, so that the denitrification and dephosphorization of sewage with high efficiency
Implementation Method 3
designed based on the ecological functions of earthworms such as swallowing organics, improving the water permeability and ventilation of soil
Implementation Method 4
the arrangement of the aeration pipe according to the present invention effectively solves the problem of oxygenation for the sewage in the ecological filter pool, and is beneficial for the survival of aerobic organisms in the sewage
Data Source
AI summary
An ecological slope protection has an efficient water purification function, built in a land-lake ecozone along the bank of a basin, wherein the body of the ecological slope protection extends into the water of the basin, and has a flexible mattress laid on the surface thereof; an ecological filter pool is provided below the flexible mattress and is isolated from the water of the basin by means of the pool body; the ecological filter pool is contained with a filler layer and a support layer, and the filler layer is supported by the support layer; the sewage pretreated via a sedimentation pool is introduced into the ecological filter pool and treated by the filler layer to clean up pollutants therein and reduce its eutrophication level; and the treated sewage is discharged from the ecological slope protection via the support layer and enters the basin.