Multi-Interface Water Governance for Cyanobacteria Control
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Solution Overview
Problem
Urban water bodies replenished with reclaimed water face eutrophication issues due to high nitrogen loads, leading to cyanobacterial blooms and environmental risks, requiring effective governance and restoration methods to improve ecological quality and reduce pollution loads.
Innovation Solution
A multi-interface governance and restoration method involving 'control for bottom' (sediment treatment), 'regulation for middle' (modified clay molecular sieve ecological base), and 'governance for top' (micropower biological-ecological coupled purification system) to manage sediment nutritive salts, inhibit algae growth, and enhance nitrogen and phosphorus removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If reclaimed water is used to replenish rivers and lakes, then water resource recycling is achieved and supply-demand contradiction is alleviated, but high nitrogen load causes eutrophication and cyanobacterial blooms
Solution Approach 1:
The patent divides the water body into multiple functional zones: ecological buffer zones with vegetation, treatment zones with artificial wetlands, and open water bodies. This segmentation allows reclaimed water to be treated progressively as it flows through different zones, reducing nitrogen load through plant uptake, microbial degradation, and sedimentation before reaching sensitive areas.
Solution Approach 2:
The patent introduces intermediary elements including aquatic vegetation (reeds, cattails, water hyacinth), microbial communities, and substrate materials (gravel, sand, soil) that mediate between the reclaimed water and the receiving water body. These intermediaries facilitate nitrogen removal through nitrification, denitrification, and plant absorption while maintaining ecological balance.
2Object-generated harmful factors
If traditional sediment dredging is performed, then pollutant removal is achieved, but large dredging amount and high treatment cost occur
Solution Approach 1:
The patent extracts pollutants from sediment in-situ using targeted methods such as electrochemical treatment, chemical oxidation, or biological remediation applied directly to contaminated sediment zones. This avoids the need to physically remove and transport large volumes of sediment, focusing instead on removing the harmful components while leaving the beneficial sediment structure intact.
Solution Approach 2:
The patent replaces mechanical dredging systems with in-situ treatment technologies including electrochemical cells, chemical injectors, and biological reactors that can treat sediment pollutants without physical removal. This substitution dramatically reduces the volume of material that needs to be handled while achieving comparable or superior pollutant removal efficiency.
3Object-generated harmful factors
If interface governance is implemented to control pollutant input, then water quality is improved, but system complexity increases
Solution Approach 1:
The patent merges multiple governance functions into integrated interface structures that simultaneously perform physical filtration, chemical treatment, and biological degradation. For example, artificial wetland interfaces combine substrate filtration zones, plant root zones for nutrient uptake, and microbial biofilm zones, achieving multiple pollutant removal mechanisms in a single integrated system rather than separate treatment stages.
Solution Approach 2:
The patent designs interface structures with multi-functionality: the same ecological buffer zone serves as a physical barrier to particulate pollutants, a chemical reactor for nutrient transformation, a biological habitat for pollutant-degrading organisms, and a hydrological transition zone. This multi-functionality reduces the number of separate治理 structures needed while enhancing overall effectiveness.
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 method effectively reduces algae dormancy and growth, improves water quality, and enhances ecosystem functions, reducing pollution loads and promoting sustainable water ecology, with cost savings in sediment dewatering and treatment.
Implementation Method 1
governance for top—reducing nitrogen and phosphorus nutrients of an air-water interface to control the reproduction and growth of the algae
Implementation Method 2
regulation for middle—regulating primary productivity in a water body to inhibit the recovery of the algae
Implementation Method 3
control for bottom—controlling the emission of sediment nutritive salts and the dormancy and recovery of algae
Data Source
AI summary
The present disclosure relates to water environment governance technology, and particularly discloses an urban river/lake water environment multi-interface governance and restoration method. The method is a multi-interface coordinated governance and restoration method based on “control for bottom, regulation for middle and governance for top”, including: “control for bottom”—controlling the emission of sediment nutritive salts and the dormancy and recovery of algae; “regulation for middle”—regulating primary productivity in a water body to inhibit the recovery of the algae; and “governance for top”—reducing nitrogen and phosphorus nutrients of an air-water interface to control the reproduction and growth of the algae. In the present disclosure, the water body governance and restoration technology based on interface coordination can effectively inhibit the outbreak of cyanobacteria and avoid extreme conditions in the ecosystem.