Calcium Phosphate Mineralization for Wastewater Stabilization
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Solution Overview
Problem
Current methods for removing heavy metals and antibiotics from wastewater are inefficient and unstable, posing risks to human health and the environment.
Innovation Solution
A method involving the slow mineralization of a calcium phosphate liquid precursor, coupled with a continuous flow of contaminants, using a packed column with a mixed solution containing calcium salt, phosphate, collagen, and polymer, to effectively solidify and remove heavy metals and antibiotics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional methods (chemical precipitation, ion exchange, adsorption, membrane filtration, electrochemical treatment) are used to remove heavy metals and antibiotics from wastewater, then some removal effect is achieved, but the methods are inefficient and unstable, failing to provide efficient and stable removal
Solution Approach 1:
The patent changes the physical-chemical parameters of the treatment system by using a packed column with controlled flow rates and incorporating a polymer-coated carrier material. The polymer coating (10-100 mg/L) modifies the surface properties to enhance adsorption capacity and stability, while the flow rate control (0.1-10 mL/min) optimizes contact time between contaminants and the mineralization interface, achieving both efficient and stable removal
Solution Approach 2:
The patent employs a composite material system consisting of calcium phosphate liquid precursor mixed with polymer (10-100 mg/L) and collagen (0.1-20 g/L) in a packed column. This composite structure creates multiple functional zones: the polymer provides adsorption sites, the calcium phosphate mineralization provides stable precipitation, and collagen offers structural support, collectively achieving superior and stable removal of heavy metals and antibiotics
2Productivity
If rapid mineralization of calcium phosphate is used to remove contaminants, then removal speed increases, but the stability and effectiveness of contaminant stabilization decreases
Solution Approach 1:
The patent introduces dynamic control of the mineralization process through controlled flow rates (0.1-10 mL/min) that allow the system to adapt to varying contaminant loads. The polymer coating dynamically adjusts adsorption capacity based on contaminant concentration, while the packed column structure provides continuous contact time, ensuring both rapid removal and stable stabilization of contaminants
Solution Approach 2:
The polymer acts as an intermediary substance between the calcium phosphate mineralization process and the contaminants. The polymer coating (10-100 mg/L) on the carrier material facilitates controlled mineralization by providing a structured interface that promotes stable precipitation while maintaining rapid contaminant uptake, thus mediating between speed and stability requirements
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 method achieves efficient and stable removal of heavy metals and antibiotics through adsorption and in-structure stabilization, reducing the risk of secondary pollution and providing a green, effective solution for wastewater treatment.
Implementation Method 1
The polymer induces local concentration of calcium and phosphate ions to form polymer-induced liquid precursor (PILP)
Implementation Method 2
slow mineralization of a calcium phosphate liquid precursor
Implementation Method 3
continuous flow of contaminants
Data Source
AI summary
A method for stabilizing heavy metals and antibiotics by coupling slow mineralization of a calcium phosphate liquid precursor with a continuous flow of contaminants is provided. In the method, a mixed solution containing a calcium salt, a phosphate, collagen and a polymer is pumped into a packed column with a wet packing method. To-be-treated sewage is pumped into the packed column, and heavy metals and antibiotics in the to-be-treated sewage are solidified and removed during mineralization of calcium phosphate.