Slightly Heavy Particle Fluidization for Low-Energy Wastewater Treatment
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Solution Overview
Problem
Current wastewater treatment technologies face inefficiencies due to high energy consumption and the need for suitable solid particles and dispersion methods in fluidization processes, particularly with heavy particles, which require large energy inputs.
Innovation Solution
A slightly heavy particle system for wastewater treatment that utilizes a contactor with a gas-liquid-solid three-phase region, where slightly heavy particles with densities close to that of the liquid are dispersed by gas injection, enhancing interphase contact and reducing energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heavy particles much denser than water are used as solid phase in fluidization systems, then the fluidization of particles can be maintained, but large energy consumption and high liquid reflux ratio are required
Solution Approach 1:
The patent changes the density parameter of the solid particles from heavy (much denser than water) to slightly heavy (density slightly higher than liquid). This parameter change allows the system to maintain fluidization with significantly reduced energy consumption and liquid reflux ratio, as the particles require less force to suspend and circulate in the liquid phase.
2Reliability
If heavy particles are used in fluidization wastewater treatment, then solid phase can be maintained, but suitable solid particles and dispersion means need to be found to save energy
Solution Approach 1:
The patent changes the density parameter of particles from heavy to slightly heavy, making them easier to disperse in liquid without requiring complex dispersion mechanisms. The slightly heavy particles naturally suspend and distribute more uniformly in the liquid phase, simplifying the overall system design and operation.
3Productivity
If traditional activated sludge process is used, then wastewater treatment can be performed, but treatment efficiency and organic load capacity are limited
Solution Approach 1:
The patent introduces slightly heavy particles as an intermediary carrier for microorganisms. These particles provide a large specific surface area that increases microorganism concentration in the system, thereby enhancing treatment efficiency and organic load capacity beyond what traditional activated sludge processes can achieve.
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 system increases microorganism concentration, improves treatment efficiency, reduces sludge yield, and minimizes energy consumption by uniformly dispersing slightly heavy particles in the liquid phase.
Implementation Method 1
The contactor includes a gas-liquid-solid three-phase region, and the gas-liquid-solid three-phase region includes gas phase, liquid phase, and solid phase. The liquid phase is the continuous phase and the solid phase is slightly heavy particles.
Implementation Method 2
due to the similar densities of solid and liquid, a slight disturbance of the gas flow is able to disperse the slightly heavy particles in the liquid
Implementation Method 3
The slightly heavy particles are able to carry microorganisms on their surfaces
Implementation Method 4
The density of the slightly heavy particles is higher than the density of the liquid. a slight disturbance of the gas flow is able to disperse the slightly heavy particles in the liquid
Data Source
AI summary
A slightly heavy particle system for wastewater treatment includes a contactor. The contactor includes a gas-liquid-solid three-phase region, and the gas-liquid-solid three-phase region includes gas phase, liquid phase, and solid phase. The liquid phase is the continuous phase and the solid phase is slightly heavy particles. The slightly heavy particles are able to carry some microorganisms on their surfaces at least, and the density of the slightly heavy particles is higher than the density of the liquid. The slightly heavy particle system applied in wastewater treatment can increase the concentration of microorganisms significantly, improve the ability to bear impact load, produce less sludge, and without sludge expansion. Meanwhile, suspending slightly heavy particles with the combined effect of gas and liquid is able to reduce energy consumption to a larger extent. Therefore, this system features with high efficiency and low energy consumption.