Mariculture Wastewater Nitrogen Phosphorus Removal System
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Solution Overview
Problem
Current mariculture wastewater treatment technologies face challenges in efficiently removing nitrogen and phosphorus, particularly due to high salinity, large discharge volumes, and stringent discharge standards, with existing methods being energy-intensive, requiring large areas, and having poor treatment efficacy and operational complexity.
Innovation Solution
An efficient nitrogen and phosphorus removal process system incorporating a physical filtering device, an efficient biological treatment unit with modified high-hydrophilic wear-resistant filler, flocculation sedimentation tank, sand filtering tank, and sludge tank, utilizing salt-tolerant nitrifying and denitrifying bacteria, and a lanthanum-containing directional Phoslock agent to enhance phosphorus removal, reducing sludge production and energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If physical treatment technology is used, then solid particles are removed, but nitrogen and phosphorus removal is insufficient
Solution Approach 1:
The treatment system is divided into multiple functional segments: physical filtering device for solid particle removal, biological treatment unit for nitrogen and phosphorus removal, flocculation sedimentation tank for further separation, and sand filtering tank for final filtration. Each segment handles specific aspects of treatment to achieve comprehensive purification.
Solution Approach 2:
The biological treatment unit uses composite filler material with specific properties (bulk density 0.8-1.2g/cm³, porosity 60-80%, surface area 200-500m²/g) that combines multiple characteristics to support microbial communities while maintaining structural integrity and facilitating mass transfer.
2Reliability
If electrochemical treatment technology is used, then treatment is achieved, but energy consumption is high and electrode passivation occurs
Solution Approach 1:
The patent replaces electrochemical treatment with a biological treatment system using microbial communities on specialized filler material. This substitution eliminates electrode passivation issues and significantly reduces energy consumption while maintaining effective nitrogen and phosphorus removal through biological processes.
3Reliability
If biological treatment technology using diatoms or unicellular algae is used, then purification is achieved, but application scenarios are limited and treatment effect is poor
Solution Approach 1:
The patent modifies the biological treatment approach by using a specially designed filler material with controlled physical parameters (bulk density 0.8-1.2g/cm³, porosity 60-80%, surface area 200-500m²/g) that supports diverse microbial communities. This enables the system to adapt to various mariculture wastewater conditions and achieve reliable treatment across different application scenarios.
4Reliability
If mangrove undercurrent wetland or ecological floating bed is used, then purification is achieved, but large land area is occupied and treatment speed is slow
Solution Approach 1:
The patent transitions from horizontal land-based treatment systems (wetlands, floating beds) to a vertical three-dimensional biological treatment unit. The specialized filler material provides extensive surface area for microbial attachment in a compact vertical configuration, achieving high purification efficiency in a small footprint with rapid treatment speed.
5Reliability
If activated sludge method is used, then treatment is achieved, but residence time is long, occupied area is large, and microbial agents are easily lost
Solution Approach 1:
The patent employs porous filler material with controlled porosity (60-80%) and high surface area (200-500m²/g) that provides extensive attachment surfaces for microbial communities. This porous structure retains microbes effectively, reduces required residence time, and compactes the system footprint compared to traditional activated sludge methods.
6Reliability
If existing microbial treatment method is used, then treatment is achieved, but it cannot meet first-class standard requirements in Discharge Requirements of Mariculture Water
Solution Approach 1:
The patent uses composite filler material with specifically engineered properties (bulk density 0.8-1.2g/cm³, porosity 60-80%, surface area 200-500m²/g) that creates an optimized environment for microbial communities. This enables the system to achieve first-class discharge standards for nitrogen (≤10mg/L), phosphorus (≤1mg/L), and other parameters, exceeding the capabilities of conventional microbial treatment methods.
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 achieves rapid biofilm formation, high nitrogen and phosphorus removal efficiency, low operational costs, and meets first-class discharge standards with reduced sludge yield and energy consumption, while being resistant to impact and simple to operate and maintain.
Implementation Method 1
utilizing salt-tolerant nitrifying and denitrifying bacteria
Implementation Method 2
utilizing salt-tolerant nitrifying and denitrifying bacteria
Implementation Method 3
a lanthanum-containing directional Phoslock agent to enhance phosphorus removal
Implementation Method 4
a lanthanum-containing directional Phoslock agent to enhance phosphorus removal
Implementation Method 5
a physical filtering device, an efficient biological treatment unit, flocculation sedimentation tank, a sand filtering tank
Implementation Method 6
flocculation sedimentation tank
Implementation Method 7
flocculation sedimentation tank
Data Source
AI summary
Disclosed is an efficient nitrogen and phosphorus removal process system for mariculture tail water treatment. The process system comprises a physical filtering device, an efficient biological treatment unit, a flocculation sedimentation tank, a sand filtering tank, a clean water tank and a sludge tank, wherein the physical filtering device, the efficient biological treatment unit, the flocculation sedimentation tank, the sand filtering tank and the clean water tank are sequentially connected; the physical filtering device, the efficient biological treatment unit, the flocculation sedimentation tank and the sand filtering tank are all connected with the sludge tank through pipelines, and the physical filtering device and the sand filtering tank are both connected with the clean water tank through pipelines. The efficient biological treatment unit is filled with a modified high-hydrophilic wear-resistant filler, and the whole system is provided with a carbon source, a flocculation agent and a directional Phoslock dosing device.