Floating Wastewater Substrate Sheets for Framework-Free Treatment
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Solution Overview
Problem
Existing modular wastewater treatment systems require a framework for support, which adds weight, cost, and complexity, and have limitations in microbial habitat diversity and oxygen gradient provision, making them inefficient and difficult to maintain.
Innovation Solution
A floating treatment system with vertically positioned, flexible, high surface area substrate sheets that provide buoyancy and flexibility, allowing for easy replacement and supporting a variety of microbial species through an open weave structure and adjustable aeration, enabling simultaneous nitrification and denitrification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a framework is used to support substrate sheets in modular wastewater treatment systems, then the sheets are prevented from crumpling and sinking, but the system weight, cost, materials, and complexity increase
Solution Approach 1:
The substrate sheets are designed with low density material (density less than 1.0 g/cm³) that provides inherent buoyancy to counteract gravitational forces. This buoyant force prevents the sheets from sinking and crumpling, eliminating the need for supportive frameworks and reducing system complexity while maintaining reliability
Solution Approach 2:
The framework support structure is completely removed from the system. Instead of using a framework to hold the substrate sheets, the invention extracts this supportive function and replaces it with buoyant force generated by the low density substrate material itself, thereby simplifying the overall system
2Reliability
If substrate sheets are made stationary in modular wastewater treatment systems, then they are easier to secure, but biomass sloughing is slow because the mass is too great to be supported
Solution Approach 1:
The substrate sheets are designed to be flexible and movable rather than stationary. This flexibility allows the sheets to move freely in the water column, which facilitates faster biomass sloughing by reducing the mass accumulation that would otherwise slow down the sloughing process, while still maintaining secure positioning through buoyancy
3Ease of manufacture
If planar substrates are used in modular wastewater treatment systems, then they are simple in structure, but they provide limited protection for emerging microbial colonies and limited habitat diversity
Solution Approach 1:
The substrate structure transitions from a two-dimensional planar shape to a three-dimensional configuration. The substrate is formed into a shape that extends vertically and has an open weave structure, creating multiple dimensions of habitat space. This three-dimensional structure provides extensive protection for emerging microbial colonies and supports greater microbial diversity while remaining relatively simple to manufacture
4Ease of manufacture
If substrate sheets are positioned horizontally at the bottom of the water body, then installation is straightforward, but they cannot be easily moved or removed without draining or dredging
Solution Approach 1:
Instead of positioning the substrate sheets horizontally at the bottom of the water body, the invention inverts this approach by positioning the sheets vertically and allowing them to float. The low density substrate material provides buoyancy that enables easy movement and removal of individual sheets without requiring draining or dredging, while still maintaining simple installation procedures
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 facilitates efficient wastewater treatment by allowing for easy maintenance, increased microbial diversity, and stable operation without the need for a framework, enabling effective biomass sloughing and oxygen gradient creation.
Implementation Method 1
The substrate sheets are made of a low density material (density less than 1.0 g/cm³) that provides buoyancy to the sheets
Implementation Method 2
The open weave structure of the substrate allows gas, nutrients and food to diffuse
Implementation Method 3
At least one aerator releases air to the sheets via a plurality of spaced apart diffusers, thereby aerating substantially all regions of substantially all sheets
Data Source
AI summary
A treatment system of the present invention generally includes a floating support structure having an upper flotation assembly, a base assembly that secures the bottom edges of a plurality of low density sheets, and vertical frame members that connect the upper flotation assembly to the base assembly. The sheets are generally vertically oriented although able to flex and sway independently. Substantially all regions of substantially all sheets are aerated. The sheets are constructed of an open weave substrate that allows the diffusion of gas, nutrients and food, while protecting and serving as an attachment site for a variety of microbial colonies in both anoxic and aerobic zones. In use a system of the present invention is inserted into a wastewater reservoir, and aerated, for treatment of the wastewater.