Modular Bioelectrochemical Drainage Filter for Nitrogen Removal
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Solution Overview
Problem
Current drainage filter technologies (DFTs) are not sufficiently effective in reducing agricultural nutrient losses and require significant land and resources, while also producing negative side-effects such as increased water temperatures and greenhouse gas emissions, making them inefficient and costly to implement.
Innovation Solution
A modular drainage filter system that includes a bio electrochemical reactor (BER) with inlet sensors to regulate energy supply based on real-time data, allowing for efficient denitrification of agricultural drainage water and minimizing area requirements and emissions, powered by renewable energy sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If current drainage filter technologies (surface-flow constructed wetlands and woodchip-based biofilters) are implemented to reduce nutrient losses, then N-reduction is achieved, but large area requirements and high implementation costs occur
Solution Approach 1:
The patent replaces traditional mechanical/biological filtration systems (wetlands, woodchip biofilters) with an electrochemical system using a bio-electrochemical reactor. This substitution enables high-rate denitrification in a compact footprint by using electrochemical reactions driven by renewable energy, eliminating the need for large land areas while maintaining effective nitrogen removal.
Solution Approach 2:
The invention changes the operational parameters of the drainage filter by implementing real-time monitoring and dynamic control of energy input to the BER. By adjusting electrical energy parameters based on sensor data about water quality and flow conditions, the system optimizes denitrification efficiency and adapts to varying agricultural drainage conditions, achieving high N-reduction rates in a compact system.
2Loss of substance
If drainage filter technologies are implemented to reduce nutrient losses, then nitrogen removal is achieved, but negative side-effects occur (increased water temperatures, greenhouse gas emissions)
Solution Approach 1:
The patent converts the harmful greenhouse gas emissions and temperature increases associated with traditional DFTs into beneficial outcomes by using renewable energy sources (wind, solar, hydro) to power the BER. The electrochemical process eliminates anaerobic conditions that produce N2O and CH4, while the controlled energy input prevents excessive water heating, transforming potential harms into sustainable benefits.
Solution Approach 2:
The bio-electrochemical reactor creates a controlled environment that prevents the formation of harmful greenhouse gases. By maintaining specific electrochemical conditions and using renewable energy sources, the system eliminates the anaerobic environments that lead to N2O and CH4 production, effectively creating an 'inert' environment regarding greenhouse gas generation while maintaining effective denitrification.
3Loss of substance
If drainage filter technologies are implemented, then nitrogen removal is achieved, but low to medium N-reduction rates occur requiring larger areas
Solution Approach 1:
The patent replaces low-productivity biological filtration with high-rate electrochemical denitrification in the BER. This substitution enables rapid nitrogen removal by using electrical energy to drive denitrifying bacteria, achieving high N-reduction rates in a compact system without requiring large land areas.
Solution Approach 2:
The system ensures continuous and reliable cleaning of incoming agricultural drainage water through real-time monitoring and dynamic energy adjustment. Sensors continuously monitor water quality parameters, and the processing means continuously adjusts energy input to the BER to maintain optimal denitrification conditions, ensuring uninterrupted high-rate nitrogen removal even during periods of large flow rate variations.
4Loss of substance
If traditional DFTs are used, then nitrogen removal is achieved, but implementation restrictions and negative side-effects occur
Solution Approach 1:
The patent implements a dynamic system with real-time monitoring and control capabilities. Sensors continuously measure water quality and flow conditions, and the processing means dynamically adjusts energy input to the BER based on actual conditions. This dynamic adaptability allows the system to effectively handle varying agricultural drainage conditions while eliminating implementation restrictions associated with traditional DFTs.
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 high denitrification rates with reduced land use and costs, while minimizing negative environmental impacts by dynamically adjusting energy to the BER, optimizing energy use and reducing N2O emissions, and includes an ECC filter to prevent clogging and an oxidation step for improved water quality.
Implementation Method 1
at least one bio electrochemical reactor (BER) arranged to denitrify the ADW
Implementation Method 2
one or more inlet sensors arranged upstream the BER and processing means for determining the optimal energy provided to the BER based on the data from the one or more inlet sensors
Implementation Method 3
determining and regulating the energy provided to the BER based on the data from the inlet sensors
Data Source
AI summary
A modular drainage filter system for treatment of agricultural drainage water such as residual streams derived from agricultural activities is provided. The system has an inlet for receiving ADW, at least one bio electrochemical reactor arranged to denitrify the ADW and at least one outlet for expelling at least partly denitrified ADWT. The drainage filter system further includes one or more inlet sensors arranged upstream the BER and processing means for determining the optimal energy provided to the BER based on the data from the one or more inlet sensors thereby allowing effective operation of the drainage filter system.