Chlorine Dioxide Air Oxidation for Multi-Contaminant Removal
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Solution Overview
Problem
Existing methods for cleaning exhaust air from farm animal facilities are inefficient and costly, as they often require multiple processes to remove organic and inorganic substances and microorganisms, and existing systems are not easily adaptable to changing conditions or capable of simultaneous removal of multiple contaminants.
Innovation Solution
An oxidative process using an aqueous solution containing chlorine dioxide is employed, where the solution is continuously recycled and used to oxidize organic and inorganic substances and microorganisms in the air stream, effectively removing contaminants and allowing for easy conversion of existing systems to improve their effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate processes are used to remove different contaminants (ammonia, dust, odors, microorganisms), then removal effectiveness for each contaminant type is improved, but device complexity and cost increase
Solution Approach 1:
The patent combines multiple contaminant removal functions into a single oxidative treatment process using chlorine dioxide. The aqueous chlorine dioxide solution simultaneously oxidizes and removes organic substances, inorganic substances, and microorganisms that were previously requiring separate treatment processes, thereby simplifying the overall system while maintaining comprehensive removal effectiveness
Solution Approach 2:
The oxidative process using aqueous chlorine dioxide solution is designed to perform multiple functions simultaneously: removing organic substances, inorganic substances, and microorganisms. This multi-functional approach replaces the need for multiple specialized processes, reducing device complexity while achieving broad contaminant removal
2Reliability
If biological treatment is used to remove organic substances, then removal effectiveness is improved, but the system requires microorganism growth time and cannot be easily adapted to changing conditions
Solution Approach 1:
The patent replaces the biological treatment system with a chemical oxidative treatment using chlorine dioxide. This substitution eliminates the need for microorganism cultures and their associated startup time and maintenance requirements, while providing immediate and adaptable contaminant removal through chemical oxidation
Solution Approach 2:
The oxidative process allows for rapid adjustment of treatment effectiveness by modifying parameters such as chlorine dioxide concentration, contact time, and solution flow rate. This provides flexibility and adaptability to changing exhaust air conditions without the constraints of biological system acclimatization
3Power
If chlorite is treated in acidic medium to produce chlorine dioxide, then oxidation capability is improved, but pH adjustment requirements increase process complexity
Solution Approach 1:
The patent employs a pH buffer system that automatically maintains the required acidic pH range (2-6.95) for efficient chlorine dioxide generation from chlorite. The buffer solution self-regulates the pH without requiring continuous manual adjustment or complex control systems, thereby maintaining high oxidation capability while simplifying operational complexity
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 process effectively reduces or eliminates organic and inorganic substances and microorganisms from exhaust air, including dust and spores, while being cost-effective and safe, with chlorine dioxide's ability to oxidize poorly soluble substances and its easy degradability contributing to its effectiveness.
Implementation Method 1
the chlorine dioxide having oxidized organic substances and/or inorganic substances and/or microorganisms contained in the air stream
Data Source
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AI summary
The invention relates to an oxidative process for reducing or eliminating organic substances and/or inorganic substances and/or microorganisms in an air stream, comprising the following continuously performed steps: - generating an air stream comprising organic substances and/or inorganic substances and/or microorganisms, - producing an aqueous solution containing chlorine dioxide, - contacting the aqueous solution containing chlorine dioxide with the air stream, such that the chlorine dioxide oxidizes the organic substances and/or inorganic substances and/or microorganisms contained in the air stream and a chlorine dioxide-depleted aqueous solution is formed, wherein the ratio of the volume flow rate of the air stream in m³/h to the mass flow rate of the aqueous solution containing chlorine dioxide in g ClO₂/h is between 4 m³/g ClO₂ and 1000 m³/g ClO₂.and – at least partial recycling of the aqueous solution depleted of chlorine dioxide and use of the recycled aqueous solution as an aqueous medium in the production of the aqueous solution containing chlorine dioxide. The invention further relates to the use of an aqueous chlorite solution for the production of an aqueous solution containing chlorine dioxide in a continuous process and to an apparatus for carrying out a corresponding oxidative process.