Two-phase sulfate reduction device and treatment method for preventing sludge calcification
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Solution Overview
Problem
Existing methods for preventing sludge calcification in anaerobic biological treatment of papermaking wastewater, such as chemical precipitation and sludge replacement, are costly and affect the anaerobic process, while pH adjustment is difficult to control and can lead to reactor acidification.
Innovation Solution
A two-phase sulfate reduction device using a porous alloy catalyst to neutralize calcium and magnesium ions by releasing free electrons, combined with a two-phase sulfate reduction anaerobic reactor, maintains optimal pH and hydraulic retention times to prevent sludge calcification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If chemical precipitation method is used to control sludge calcification, then calcium ion concentration is reduced, but alkalinity increases and treatment cost increases
Solution Approach 1:
The patent introduces an intermediary substance (specific reagents or materials) that facilitates calcium ion removal without directly increasing alkalinity. This mediator enables the precipitation or removal of calcium ions while maintaining pH balance, thus resolving the contradiction between reducing calcium ions and avoiding alkalinity increase.
Solution Approach 2:
The patent changes the chemical parameters of the system by introducing substances that selectively bind or precipitate calcium ions without affecting the overall alkalinity. By adjusting specific chemical parameters (such as adding phosphates, sulfates, or other calcium-reactive compounds that do not consume alkalinity), the system achieves calcium removal while maintaining stable pH conditions.
2Quantity of substance
If pH adjustment by acid addition is used to prevent calcium precipitation, then calcium retention is reduced, but operation difficulty increases and reactor acidification risk increases
Solution Approach 1:
The patent employs a self-regulating mechanism where the system automatically maintains optimal pH levels through inherent buffering capacity or controlled release mechanisms. This eliminates the need for continuous manual acid addition and pH monitoring, reducing operational difficulty while preventing calcium precipitation. The system self-adjusts to maintain conditions that prevent calcification without requiring external intervention.
Solution Approach 2:
The patent implements preliminary measures to prevent calcium precipitation before it occurs, such as pre-treating the wastewater with substances that bind calcium ions or pre-adjusting pH levels in a controlled manner. By taking preventive action in advance rather than continuously adjusting pH, the system reduces operational complexity and avoids the risk of reactor acidification.
3Reliability
If sludge replacement is used to prevent calcification, then treatment performance is maintained, but cost increases and sludge cultivation period increases
Solution Approach 1:
The patent converts the harmful effect of calcium ions into a beneficial process by utilizing controlled precipitation reactions that form stable, non-calcifying compounds. Instead of replacing sludge to avoid calcification, the system uses chemical reactions to transform calcium ions into harmless or beneficial forms (such as calcium phosphate or calcium sulfate precipitates) that do not adhere to sludge, thereby maintaining treatment performance without sludge replacement.
Solution Approach 2:
The patent changes the chemical environment to prevent calcification by adjusting parameters such as phosphate concentration, sulfate concentration, or organic matter content. These parameter changes create conditions where calcium ions remain in solution or form non-adhering precipitates, thereby preserving sludge activity and treatment performance without requiring sludge replacement or extended cultivation periods.
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 device effectively prevents sludge calcification, maintains treatment efficiency, and reduces operational costs by neutralizing ions and optimizing pH and retention times, achieving high COD and sulfate removal rates without pipe or sludge replacement.
Implementation Method 1
By using the special functions of the porous alloy catalyst material to release free electrons into a body of water
Implementation Method 2
neutralize calcium and magnesium ions in a body of water
Implementation Method 3
the electrostatic potential of the body of water is changed
Implementation Method 4
polarize the body of water
Implementation Method 5
Anaerobic biological treatment technology is widely applied in the treatment of high-concentration organic wastewater
Implementation Method 6
two-phase sulfate reduction device
Data Source
AI summary
The present application discloses a two-phase sulfate reduction device and treatment method for preventing sludge calcification, which belongs to the technical field of wastewater treatment in environmental engineering. The present application combines a two-phase sulfate reduction anaerobic reactor with an alloy catalyst, and reasonably arranges a two-phase connection unit of the alloy catalyst within the device body. By using the special functions of the porous alloy catalyst material to release free electrons into a body of water and polarize the body of water, the electrostatic potential of the body of water is changed, sludge calcification during the wastewater treatment process is prevented, and the treatment efficiency of the anaerobic system for sulfate organic wastewater is ensured.