Modified Ceramsite Packing for Biomembrane Trickling Filter
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Solution Overview
Problem
Current biomembrane trickling filter technologies face challenges with low desulfurization efficiency, long biomembrane colonization times, and poor stability due to inadequate packing characteristics, such as high cost, low mechanical strength, and insufficient microorganism attachment on conventional inert packings like rock wool-compost and zeolite.
Innovation Solution
Chemically modified ceramsite packing is developed with enhanced specific surface area, porosity, and bio-affinity through acid impregnation, ultrasonic treatment, and high-temperature calcination, facilitating better immobilization of desulfurization microorganisms and improving biomembrane colonization, allowing for counter-current gas-liquid phase operation to enhance SO2 removal efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional inert packing (rock wool-compost, zeolite) is used in biomembrane trickling filter, then the structure is simple and cost is low, but the specific surface area is insufficient, mechanical strength is low, and microorganism attachment is poor leading to long colonization time
Solution Approach 1:
The patent applies parameter changes by chemically modifying the ceramsite packing surface through acid impregnation and high-temperature calcination. This changes the surface chemistry and physical properties of the packing, increasing specific surface area and creating favorable conditions for microorganism attachment, thereby accelerating biomembrane colonization while maintaining structural simplicity
Solution Approach 2:
The patent uses composite materials by combining ceramsite base material with metal salts (such as iron salts) through impregnation and calcination processes. This creates a composite packing material with enhanced surface area, improved mechanical strength, and increased bio-affinity, resolving the contradiction between simplicity and colonization speed
2Ease of manufacture
If conventional inert packing is used, then manufacturing cost is low, but mechanical strength and abrasion resistance are insufficient
Solution Approach 1:
The patent applies parameter changes through high-temperature calcination (500-800°C) of the impregnated ceramsite packing. This thermal treatment strengthens the packing structure, improves mechanical strength and abrasion resistance, while the acid impregnation process enhances surface properties without significantly increasing cost
Solution Approach 2:
The patent utilizes porous materials by maintaining and optimizing the porous structure of ceramsite packing. The porous characteristics provide high specific surface area and good permeability, while the chemical modification enhances the mechanical strength of the porous structure, resolving the contradiction between cost and strength
3Ease of operation
If conventional packing is used, then the system is simple to operate, but desulfurization efficiency is low due to insufficient microorganism attachment
Solution Approach 1:
The patent applies parameter changes by modifying the packing surface chemistry through acid impregnation and calcination, creating a surface with enhanced bio-affinity. This increases microorganism attachment and desulfurization efficiency while maintaining simple operation characteristics
Solution Approach 2:
The patent uses the successful bio-trickling filtration process model and applies it to modified ceramsite packing. The process remains simple to operate but the modified packing enhances microorganism attachment and desulfurization efficiency, resolving the contradiction between operational simplicity and treatment efficiency
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 modified ceramsite packing increases desulfurization efficiency, reduces biomembrane colonization time, and provides a stable, compact biomembrane, achieving high removal rates of sulfur dioxide from flue gas with reduced operational costs and environmental impact.
Implementation Method 1
According to the adsorption theory, the packing should be selected with large specific surface area, good bio-affinity... The modified ceramsite packing increases desulfurization efficiency... facilitating better immobilization of desulfurization microorganisms
Implementation Method 2
Chemically modified ceramsite packing is developed with enhanced specific surface area, porosity, and bio-affinity through acid impregnation, ultrasonic treatment, and high-temperature calcination
Implementation Method 3
Chemically modified ceramsite packing is developed with enhanced specific surface area, porosity, and bio-affinity through acid impregnation, ultrasonic treatment, and high-temperature calcination
Data Source
AI summary
A process of removing SO2 from a flue gas with a trickling filter using modified ceramsite packing is described. The biological flue gas desulfurization process includes: feeding the flue gas containing sulfur dioxide through the column bottom into the biomembrane trickling filter at certain temperature, contacting with the modified ceramsite biomembrane packing and purifying, which purified flue gas is discharged via the column top; and spraying the nutrient fluid rich in high concentration of the desulfurization strain through the top to the modified ceramsite biomembrane packing, thereby the sulfur-bearing pollution source in the flue gas is degraded, so as to discharge a purified flue gas satisfying the environmental requirements.