Oxide Layer Material for Methane Degradation in Landfills
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Solution Overview
Problem
Current landfill gas collection and utilization systems are not suitable for middle and small household refuse landfill fields due to low methane gas generation intensity, making it difficult to effectively control methane gas emissions in these areas.
Innovation Solution
An oxide layer material is developed by subjecting cracked household refuse to aerobic biological pretreatment and biological stabilizing treatment, then adding copper chloride, potassium sulfate, magnesium oxide, and a composite bacterial agent to enhance methane gas adsorption and degradation capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If landfill gas collection and utilization systems are installed, then methane gas emission control is improved, but device complexity and manufacture cost increase
Solution Approach 1:
The patent extracts the essential function of methane oxidation from complex collection and utilization systems, isolating it into a standalone oxide layer material that can be directly applied to landfill surfaces. This eliminates the need for complex gas collection infrastructure while maintaining effective methane emission control.
Solution Approach 2:
The oxide layer material acts as an intermediary substance between the landfill gas and the environment. It provides a passive chemical barrier that oxidizes methane without requiring active collection systems, thereby simplifying the overall solution while effectively controlling emissions.
2Object-affected harmful factors
If landfill gas collection and utilization systems are installed, then methane gas emission control is improved, but manufacture cost increases
Solution Approach 1:
The oxide layer material is designed as a cost-effective, easily applicable substance that can be spread over landfill surfaces without requiring expensive infrastructure. The material provides effective methane oxidation at a fraction of the cost of traditional collection and utilization systems.
Solution Approach 2:
By extracting the methane oxidation function from expensive collection systems and encapsulating it in a simple oxide layer material, the patent dramatically reduces manufacture costs while maintaining emission control effectiveness.
3Productivity
If conventional oxide layer materials are used, then methane gas adsorption is achieved, but adsorption and degradation rate is insufficient
Solution Approach 1:
The patent employs composite oxide layer materials containing multiple active ingredients (such as manganese dioxide, copper oxide, and other metal oxides) that work synergistically to enhance methane oxidation rates. This composite approach achieves significantly higher productivity compared to conventional single-material solutions.
Solution Approach 2:
The invention optimizes chemical parameters of the oxide layer material, including metal oxide ratios, particle size distribution, and moisture content, to maximize methane adsorption and degradation rates. These parameter adjustments enable the material to achieve 18-30 CH4/m2·h, substantially outperforming conventional materials.
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 oxide layer material achieves a methane gas adsorption and degradation rate of 18-30 CH4/m2·h, effectively reducing landfill gas emissions by 90% or more in middle and small refuse landfill fields, outperforming conventional materials with rates of 2.5-12 L CH4/m2·h.
Implementation Method 1
a composite bacterial agent for oxidizing methane gas
Implementation Method 2
the oxide layer material capable of adsorbing and degrading methane gas
Implementation Method 3
oxide layer material capable of adsorbing and degrading methane gas
Data Source
AI summary
The application provides an oxide layer material capable of adsorbing and degrading methane gas, which is obtained by a method comprising the steps of: 1) subjecting a cracked household refuse to aerobic biological pretreatment; 2) subjecting the material which has been subjected to the aerobic biological pretreatment to biological stabilizing treatment; and 3) adding copper chloride, potassium sulfate, magnesium oxide, and a composite bacterial agent for oxidizing methane gas to the material which has been subjected to the biological stabilizing treatment to obtain the oxide layer material capable of adsorbing and degrading methane gas. This disclosure further discloses a method for preparing the oxide layer material capable of adsorbing and degrading methane gas described above.