Wastewater Purification Device Vertical Nitrification Denitrification
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Solution Overview
Problem
Current wastewater treatment systems for small and medium-sized communities require multiple stages and large installations to achieve effective nitrogen removal, leading to increased costs and complexity, especially due to the need for separate nitrification and denitrification processes in different environmental conditions.
Innovation Solution
A wastewater treatment device with a forced aeration system that supplies oxygen to both superimposed treatment stages, allowing for simultaneous nitrification and denitrification within a single structure, and promotes sludge mineralization by alternating aerobic and anoxic phases, thereby reducing the overall size of the treatment facility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate treatment stages are used for nitrification and denitrification, then nitrogen removal effectiveness is improved, but the land area and device complexity increase
Solution Approach 1:
The patent combines nitrification and denitrification processes into a single treatment stage by superimposing aerobic zones (for nitrification) and anoxic zones (for denitrification) within the same filter structure. This merging eliminates the need for separate treatment facilities while maintaining effective nitrogen removal through vertical integration of different oxygen conditions.
Solution Approach 2:
The patent transitions from horizontal separation of treatment stages to vertical superposition by stacking aerobic and anoxic zones in different elevation levels within the same footprint. This dimensional change allows multiple treatment functions to coexist in one location, reducing land area while preserving treatment effectiveness.
2Reliability
If multiple separate treatment stages are used for nitrification and denitrification, then nitrogen removal effectiveness is improved, but the installation cost increases
Solution Approach 1:
The patent combines nitrification and denitrification processes into a single treatment stage by superimposing aerobic zones (for nitrification) and anoxic zones (for denitrification) within the same filter structure. This merging eliminates the need for separate treatment facilities while maintaining effective nitrogen removal through vertical integration of different oxygen conditions.
3Reliability
If separate facilities are used for nitrification and denitrification, then the treatment process reliability is improved, but the land area required increases
Solution Approach 1:
The patent transitions from horizontal separation of treatment stages to vertical superposition by stacking aerobic and anoxic zones in different elevation levels within the same footprint. This dimensional change allows multiple treatment functions to coexist in one location, reducing land area while preserving treatment effectiveness.
4Productivity
If forced aeration is applied to accelerate sludge mineralization, then the treatment efficiency is improved, but the energy consumption increases
Solution Approach 1:
The patent implements periodic or intermittent aeration instead of continuous forced aeration. This allows the system to alternate between aerobic conditions (for sludge mineralization and nitrification) and anoxic conditions (for denitrification), reducing overall energy consumption while maintaining treatment efficiency through rhythmic oxygen supply.
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 configuration enables complete nitrogen treatment and sludge mineralization within a compact setup, reducing installation size and costs while maintaining effective pollution control, and also contributes to the elimination of pathogenic germs through horizontal flow and aeration.
Implementation Method 1
a forced aeration system, located at the bottom of the device, supplies oxygen to both superimposed treatment stages
Implementation Method 2
the oxygen rising to the surface promotes the mineralization of the sludge that accumulates on the surface of the planted filter
Implementation Method 3
the configuration of the treatment device according to the invention allows for alternating aerobic and anoxic phases in the second-stage filter(s), thus enabling the denitrification of nitrates
Implementation Method 4
the use of a forced aeration system in a wastewater treatment system comprising a horizontal flow stage contributes to at least the partial elimination of pathogens potentially present in the effluent to be treated
Data Source
Figure 1
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Figure 3~4
AI summary
The invention relates to a filtering-mass wastewater purification device (100) comprising a freely drained fixed culture first stage (101), placed directly above a water-saturated fixed-culture second stage (105), and a forced aeration system (110) extending under the second stage. The invention also relates to a wastewater treatment process, and also to a sludge mineralisation process, using such a purification device.