Active Metal Filter Material for Aquaculture Water Purification
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Solution Overview
Problem
Current aquaculture water purification methods, including mechanical and biological filtration, and electrochemical treatments, face challenges such as high maintenance requirements, sensitivity to water parameters, and potential harm to organisms due to pH imbalance and material degradation.
Innovation Solution
A filter material comprising an active metal anode and an inactive metal or conductive non-metal cathode, with optional catalysts, acidifying agents, and sustained-release materials, designed to operate within the pH range of 6-8, which generates hydroxyl radicals for effective water treatment without external voltage or current, reducing material corrosion and maintaining water quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If micro-electrolysis technology is used to treat organic wastes, then oxidation and reduction effects are achieved, but pH continuously increases exceeding organism tolerance
Solution Approach 1:
The patent converts the harmful effect of hydroxyl radicals (which cause pH increase) into a beneficial effect by introducing them through Fenton reagent. The controlled introduction of H2O2 with Fe2+ catalyst generates hydroxyl radicals for oxidation while the acidifying agent compensates for pH increase, transforming the harmful uncontrolled pH rise into a controlled oxidation process that benefits treatment while protecting organisms.
Solution Approach 2:
The patent introduces Fenton reagent (H2O2 + Fe2+) as an intermediary substance to mediate the oxidation process. Instead of relying solely on micro-electrolysis which causes uncontrolled pH rise, the Fenton reagent provides controlled hydroxyl radical generation for organic waste oxidation, with the acidifying agent serving as another intermediary to balance pH levels and protect organisms.
2Productivity
If electrochemical method with carbon-based catalyst is used, then ammonia nitrogen is converted to nitrogen, but function is affected by dissolved oxygen requiring external current
Solution Approach 1:
The patent makes the filter material self-service by incorporating both the catalyst (Fe2+) and oxidant (H2O2) directly into the filter material structure. The Fenton reaction occurs autonomously within the filter material without requiring external current or dissolved oxygen, eliminating the complexity of electrochemical systems while maintaining ammonia nitrogen removal capability through self-sustained chemical reactions.
3Reliability
If mechanical filtration is used to remove pollutants, then water quality is maintained, but filter material must be periodically changed
Solution Approach 1:
The patent changes the chemical parameters of the filter material by incorporating Fenton reagent components (Fe2+ catalyst and H2O2 oxidant) that provide active oxidation capability. This transforms the filter material from a passive mechanical filtration medium with limited service life into an active chemical treatment medium that continuously generates oxidizing agents, thereby extending service life while maintaining water quality through both mechanical and chemical mechanisms.
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 filter material effectively reduces organic pollutants and maintains water quality over time, preventing organism harm and extending the service life by controlling pH and reducing hydroxyl radical consumption, while allowing for adjustable reaction rates and dissolved oxygen increase.
Implementation Method 1
a micro-electrolysis process currently uses iron and carbon as fillers in an acidic condition, in which iron acts as an anode and carbon acts as a cathode, to generate micro-current through numerous micro-current reactors formed between iron and carbon, so that organics can be oxidized and reduced under the action of micro-currents
Implementation Method 2
achieves the requirements for maintaining water quality by means of the adsorption of filter material or microbial action on the filter material
Data Source
AI summary
The present invention discloses a filter material for a culture system, and a preparation method and use thereof. The filter material comprises an anode material and a cathode material, wherein the anode material is an active metal, and the cathode material is an inactive metal or a conductive non-metal. The filter material can significantly improve the water quality in the culture system, be used for in-situ treatment of the water body in the culture system and be convenient to use. The filter material does not require additional application of voltage or current, and thus is safer. At the same time, the filter material has a long service life and does not need to be changed frequently. In addition, the preparation method of the filter material is simple, efficient, and environmentally friendly, and is advantageous for large-scale production.