Sphingomonas sp. MD2 Biocover for Landfill Methane and Odor Decomposition
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Solution Overview
Problem
Current technologies are inefficient and costly for reducing methane and odor emissions from landfills, with existing odor management techniques not effectively addressing the root sources of odor and lacking economic viability for large-scale applications.
Innovation Solution
A novel Sphingomonas sp. MD2 strain is developed, capable of concurrently decomposing methane and odor-producing compounds, integrated into biocovers and biofilters with specific media and oxygen-releasing compounds to enhance decomposition efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional odor management techniques (deodorizers, biofilters) are used, then odor suppression is achieved, but treatment cost increases and efficiency decreases
Solution Approach 1:
The patent combines methane oxidation and odor removal functions into a single integrated system using Sphingomonas sp. MD2 strain. The microorganism simultaneously degrades methane and odor-producing compounds (hydrogen sulfide, methanethiol, dimethyl sulfide) in one biological process, eliminating the need for separate treatment systems and reducing overall treatment costs.
Solution Approach 2:
The Sphingomonas sp. MD2 strain performs multiple functions: it oxidizes methane as a carbon source while simultaneously removing various odor-producing compounds from the same waste stream. This multi-functional capability replaces multiple specialized treatment technologies, improving cost-effectiveness and operational efficiency.
2Object-generated harmful factors
If landfill gas capturing technology is applied, then methane reduction is achieved, but it is difficult to apply to inefficient landfills and low concentration emissions
Solution Approach 1:
The Sphingomonas sp. MD2 strain utilizes methane itself as a carbon source for growth and energy, automatically adapting to varying methane concentrations in the waste stream. This self-regulating biological process works effectively across different landfill types and emission concentrations without requiring external energy input or complex control systems.
Solution Approach 2:
The microorganism can adapt its metabolic parameters to handle different methane concentrations (0.5-10% v/v) and co-existing odor compounds. The biological degradation process dynamically adjusts to varying waste composition and emission rates, making the technology universally applicable from efficient to inefficient landfills.
3Ease of operation
If passive odor suppression methods are used, then implementation is simple, but root cause odor sources are not addressed
Solution Approach 1:
The technology converts harmful odor-producing compounds (hydrogen sulfide, methanethiol, dimethyl sulfide) into beneficial products through biological oxidation. The same microorganism that degrades methane also transforms odor compounds into harmless substances, simultaneously addressing both methane reduction and odor elimination at their source.
Solution Approach 2:
The Sphingomonas sp. MD2 strain performs preliminary degradation of odor-producing compounds during the methane oxidation process. By removing odor compounds at the source rather than treating them separately after emission, the system prevents odor problems before they occur, eliminating the need for post-emission suppression methods.
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 Sphingomonas sp. MD2 strain effectively reduces both methane and odor emissions, lowering treatment costs and improving land use efficiency, thereby contributing to national industrial competitiveness.
Implementation Method 1
aerobic decomposition of methane and other odor-producing compounds
Implementation Method 2
capable of aerobically decomposing methane and other odor-producing compounds
Data Source
Figure 1
Figure 2
Figure 3(a)~3(d)
AI summary
The present invention relates to a Sphingomonas sp. MD2 strain (KCTC 11845BP), a composition including the strain for decomposing methane or odor-producing compounds, a biocover or biofilter including the composition, a method for decomposing methane or odor-producing compounds using the composition, a system for decomposing methane or odor-producing compounds using the biocover or biofilter, and the use of the strain for decomposing methane or odor-producing compounds. According to the present invention, methane and odor can be effectively removed concurrently, and thus the cost required for the separate treatment of methane and odor can be reduced, and methane and odor-producing compounds in landfills or the like can be effectively decomposed.