Three-Dimensional Electrode Coke Wastewater Treatment
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Solution Overview
Problem
Current methods for advanced treatment of coke wastewater, such as biofilm, coagulation, and advanced oxidation processes, face inefficiencies and high costs, particularly in achieving standards for COD, ammonia nitrogen, and chroma removal, with existing technologies struggling to stabilize treatment processes and manage environmental pollution effectively.
Innovation Solution
A method combining a three-dimensional fluidized bed electrode with coagulation using polysilicate ferric magnesium as a coagulant, where wastewater is treated with acidification, electrolysis, and subsequent coagulation, enhancing mass transfer and adsorption capabilities to achieve stable and efficient removal of pollutants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a biofilm process is adopted for advanced treatment, then treatment of organic substances is improved, but microbial growth becomes difficult, treatment efficiency becomes low and frequent backwash of packing materials is required
Solution Approach 1:
The patent replaces the biofilm process (biological system) with an electrochemical oxidation system using a three-dimensional electrode. This substitution eliminates the need for microbial growth while achieving effective degradation of organic substances through electrochemical reactions, thereby resolving the contradiction between treatment efficiency and microbial growth requirements.
2Ease of operation
If a coagulation method is widely used, then treatment process is simplified, but organic substances contained in the effluent have a strong polarity and conventional coagulant is unsatisfactory in treatment effect, thus the emission standards cannot be achieved
Solution Approach 1:
The patent changes the fundamental treatment parameter from chemical coagulation to electrochemical oxidation. By applying electrical current through a three-dimensional electrode system, the treatment mechanism shifts from relying on coagulant chemistry to electrochemical reactions that effectively degrade polar organic substances, thereby achieving emission standards while maintaining operational simplicity.
3Reliability
If active carbon is applied to advanced treatment of coke wastewater, then adsorption of organic substances is improved, but active carbon is high in costs, difficult in regeneration, and high in operating costs
Solution Approach 1:
The patent replaces the adsorption-based active carbon system with an electrochemical oxidation system. Instead of relying on physical adsorption that requires expensive, non-regenerable active carbon, the system uses electrochemical reactions to degrade organic substances in situ, thereby achieving effective treatment with significantly reduced material costs and improved regenerability through continuous operation.
4Reliability
If advanced oxidation process is applied, then treatment effect is excellent, but it is currently still focused on laboratory research stage and the operating costs are high
Solution Approach 1:
The patent segments the advanced oxidation process into a practical, scalable configuration using a three-dimensional electrode system. By dividing the treatment into electrochemical oxidation reactions occurring throughout a three-dimensional structure, the system achieves laboratory-level treatment effects while being adaptable to industrial-scale application, thereby reducing operating costs and improving feasibility for practical deployment.
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 method effectively achieves primary effluent standards for COD, ammonia nitrogen, and chroma, reducing environmental pollution while maintaining low operating costs and operational stability.
Implementation Method 1
a method combining a three-dimensional fluidized bed electrode with coagulation using polysilicate ferric magnesium as a coagulant, where wastewater is treated with acidification, electrolysis, and subsequent coagulation
Implementation Method 2
a method combining a three-dimensional fluidized bed electrode with coagulation using polysilicate ferric magnesium as a coagulant
Implementation Method 3
the coke wastewater is disposed by coal ash-lime for advanced adsorption treatment
Implementation Method 4
three-dimensional fluidized bed electrode
Data Source
AI summary
A method for treatment of coke wastewater, including (1) introducing wastewater into a regulating reservoir into which an acid liquor is added until the pH value of the wastewater ranges between about 5.5 and about 6.5; (2) introducing the wastewater into a three-dimensional electrode treatment device for electrolysis treatment; and (3) introducing the wastewater into a coagulation reaction tank into which an alkali liquor is added until the pH value of the wastewater ranges between 8 and 10, and as a coagulant polysilicate ferric magnesium is added into the wastewater for a hybrid reaction of between 5 and 15 mins; allowing the wastewater to flow into a sedimentation basin for plain sedimentation of between 4 and 6 hrs; and extracting a supernatant liquor to yield a processed effluent.