Electron Beam Soil Treatment for TPH Reduction
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Solution Overview
Problem
Current methods for treating petroleum and petroleum-derived compound (PPDC)-impacted solids are time-consuming and expensive, and lack efficient high-throughput and high-efficiency e-beam irradiation processes for remediating soil and sediments, as well as effective recycling or disposal of transformed gaseous hydrocarbons.
Innovation Solution
A system and method involving ex situ electron beam irradiation of PPDC-impacted solids, using multiple electron beam sources with controlled energy levels and dosages, combined with a gas driver for separating gases, and optional heating and amendments to enhance treatment efficiency, allowing for the transformation and separation of PPDCs from solids at low temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional methods (landfilling, bioremediation, combustion, thermal desorption) are used for treating PPDC-impacted solids, then treatment can be performed, but the process is time-consuming and expensive
Solution Approach 1:
The patent replaces conventional mechanical and thermal treatment systems with an electron beam irradiation system. The e-beam processing uses electromagnetic radiation to directly break down PPDC molecules in soil, eliminating the need for lengthy bioremediation processes or energy-intensive thermal desorption, thereby dramatically reducing treatment time while maintaining effectiveness
Solution Approach 2:
The patent changes the fundamental treatment parameter from thermal or biological processes to ionizing radiation (electron beams). By using controlled e-beam energy levels and dosages, the system achieves rapid PPDC transformation and removal, improving productivity without the time constraints of conventional methods
2Productivity
If e-beam irradiation is applied to PPDC-impacted solids, then treatment efficiency is improved, but there is no known method for high throughput processing or recycling of gaseous components
Solution Approach 1:
The patent segments the e-beam treatment process into multiple irradiation zones or passes, allowing high throughput processing by treating different portions of the soil stream sequentially or in parallel. This modular approach increases capacity while managing system complexity
Solution Approach 2:
The patent implements a gas recovery system that captures gaseous hydrocarbons produced during e-beam treatment. Instead of venting these gases, the system recovers and processes them, potentially converting them back to useful products or safely disposing of them, thereby adding value to the process and reducing overall complexity
3Reliability
If e-beam processing is used for PPDC treatment, then TPH removal is achieved, but there are no known methods for beneficial reuse of treated solids or disposal of transformed PPDC
Solution Approach 1:
The patent designs the e-beam treatment system to be universally applicable to various types of PPDC-impacted materials (soil, sediments, sludges). The same core technology can treat different contaminants and produce treated materials suitable for various reuse applications, thereby increasing adaptability while maintaining reliable TPH removal
Solution Approach 2:
The patent transforms the harmful PPDC contaminants into beneficial products through e-beam irradiation. The breakdown of petroleum compounds produces recoverable gases, liquids, and cleaned solids that can be reused or safely disposed of, converting the waste problem into a resource recovery opportunity
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
This approach enables high-efficiency transformation and separation of PPDCs, reducing Total Petroleum Hydrocarbons (TPH) content, improving conventional treatment processes, and facilitating environmentally sound recycling and disposal of gaseous compounds, while minimizing costs and operational complexity.
Implementation Method 1
e-beam processing can cause chemical and physical changes in various substances by exposure to ionizing radiation in the form of electrons with energies lower than about 10 MeV
Implementation Method 2
irradiating the PPDC-impacted solid material with at least one electron beam source
Implementation Method 3
utilizing a gas driver, e.g., a carrier gas flow from the bottom to the top of the reactor that assists with the removal gases produced during e-beam processing
Data Source
AI summary
The present invention is directed to a method for irradiating of solids containing petroleum or petroleum derived compounds (PPDCs), such as soils, oily sludge, drill cuttings, sediments, and non-commercial petroleum industry products, with electron beams in order to physically and/or chemically alter the composition of the PPDCs. The method includes the step of separating PPDC gas and liquids in the presence of a gas driver. Optionally, the method includes the steps of treating off-gases and applying one or more amendments to PPCD-impacted solid material pre-irradiation, post-irradiation, or during electron beam irradiation.