Multi-Level Septic Filter with Inclined Settling Plates
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Solution Overview
Problem
Existing filtration systems for septic tank effluent have limited filtration levels, leading to frequent servicing and potential false alarms due to solids trapping issues, which increases maintenance costs and reduces the effectiveness of drainfield protection.
Innovation Solution
A multi-level filtration system with a separate weir wall and inclined settling plates, featuring multiple apertures that allow larger solids to settle back into the septic tank and additional apertures in the weir wall for increased filtration area, along with an alarm switch placement on the filtered side to prevent false alarms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a single-level filtration system is used, then the device complexity is reduced, but the service interval is shortened due to frequent clogging and the need for frequent servicing
Solution Approach 1:
The filtration system is divided into multiple levels with different aperture sizes. The first level has larger apertures that allow smaller particles to pass through, while the second level has smaller apertures that capture finer particles. This segmentation enables each level to handle different particle sizes, extending the service interval before clogging occurs.
Solution Approach 2:
The invention transitions from a single-plane filtration approach to a multi-level vertical arrangement. By stacking filtration levels at different heights within the cartridge, the system increases the effective filtration area and capacity without significantly increasing the horizontal footprint, thereby extending service intervals.
2Reliability
If the alarm switch is placed on the unfiltered side, then the detection is simpler, but false alarms occur due to solids attaching to the switch
Solution Approach 1:
The alarm switch is extracted from its conventional position on the unfiltered side and relocated to the downstream side of the filter cartridge. This extraction places the switch in an environment where effluent has already been filtered, removing the source of false alarms caused by solids accumulation while maintaining the alarm's detection function.
3Manufacturing precision
If multiple filters are installed in series to achieve fine filtration, then the filtration efficiency is improved, but the device complexity and cost increase
Solution Approach 1:
Multiple filtration levels that would traditionally require separate filter cartridges are merged into a single integrated cartridge design. The multi-level structure combines coarse and fine filtration stages within one unit, achieving the same filtration efficiency as multiple separate filters while reducing system complexity and cost.
Solution Approach 2:
The filter cartridge is designed to perform multiple filtration functions simultaneously at different levels. The same cartridge structure provides both coarse screening at the first level and fine filtration at the second level, making it a universal solution that replaces what would otherwise require multiple specialized filters.
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 design significantly extends the service interval of filters, reduces maintenance frequency, and enhances filtration efficiency, protecting drainfields from excessive solids while minimizing false alarms and maintenance costs.
Implementation Method 1
allows solid and semisolid masses larger in size than the apertures to settle on the inclined plates and then slough back into the septic tank
Implementation Method 2
Multi-level filter device... separating suspended solids in a liquid solution... filtering septic tank effluent
Data Source
AI summary
The present invention is directed to a method for filtering fluid, preferably effluent fluid in a septic system, by providing a staged, filtering array in an effluent flow path, the stages positioned in an orientation designed to maximize filtering capability in conjunction with predetermined aperture positions and dimensions.