Wastewater Reuse System with Dynamic Mode Switching
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Solution Overview
Problem
Municipal wastewater treatment systems become overloaded as population grows, leading to environmental pollution and wastage of potable water, while septic and advanced wastewater treatment systems face issues with soil conditions, rainfall, and lack of backup systems, resulting in inefficient water reuse and potential environmental hazards.
Innovation Solution
A wastewater treatment and reuse system that integrates with municipal, septic, or advanced wastewater treatment systems, allowing treated wastewater to be reused for irrigation and potentially recycled for toilet flushing, reducing the load on municipal systems and conserving water, while incorporating features like overflow diversion, disinfection, and monitoring systems to manage excess water and ensure safe reuse.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If municipal wastewater treatment systems are used to treat increasing population waste, then more wastewater can be treated, but the systems become overloaded and discharge inadequately treated wastewater into streams causing environmental pollution
Solution Approach 1:
The system changes the operational parameters of wastewater treatment by switching between municipal wastewater treatment system (MWS) operation during dry weather and septic system operation during wet weather or overflow conditions. This parameter change allows the system to adapt to varying flow conditions and prevent environmental pollution while maintaining treatment capacity.
Solution Approach 2:
The system dynamically switches between two wastewater treatment modes based on real-time conditions such as rainfall, soil saturation, and system capacity. The controller monitors conditions and automatically diverts wastewater between MWS and septic system, creating a dynamic adaptive system that prevents overload and environmental damage.
2Quantity of substance
If treated wastewater is discharged into streams from municipal systems, then wastewater treatment capacity is maintained, but potable water is wasted and environmental impact increases
Solution Approach 1:
Instead of discarding treated wastewater into streams, the system recovers and reuses it for irrigation purposes. The septic system treats wastewater locally and the controller directs the treated effluent to irrigation fields, transforming a waste disposal problem into a water recovery and reuse solution that conserves potable water.
Solution Approach 2:
The system provides self-service by using the property's own treated wastewater for irrigation needs, eliminating the need to discharge into streams and reducing dependence on potable water sources. The irrigation system automatically receives treated effluent from the septic system, creating a self-sustaining water cycle.
3Loss of substance
If septic systems are used for wastewater treatment, then potable water conservation is achieved, but the systems fail during heavy rain or soil saturation causing sewage to spill onto land
Solution Approach 1:
The system provides beforehand cushioning by having a backup municipal wastewater treatment system ready to receive overflow when the septic system becomes saturated during heavy rain. The controller monitors soil saturation and automatically diverts excess wastewater to the MWS, preventing sewage spills and land contamination while maintaining potable water conservation during normal operation.
Solution Approach 2:
The controller acts as an intermediary that mediates between the septic system and municipal wastewater treatment system, automatically switching operation modes based on environmental conditions. This intermediary manages the transition between systems, ensuring reliable wastewater disposal during heavy rain while maintaining the benefits of septic system operation during normal conditions.
4Object-affected harmful factors
If advanced wastewater treatment systems are used, then wastewater can be disinfected and safely discharged, but the systems still lack backup during soil saturation and require significant land area
Solution Approach 1:
The system segments the wastewater treatment function into two separate systems: the advanced wastewater treatment system for primary treatment and disinfection, and the septic system for additional treatment and irrigation reuse. This segmentation allows each system to operate within its optimal capacity and provides redundancy without requiring a single large-scale complex system.
Solution Approach 2:
The system achieves multi-functionality by using the same septic system for both wastewater treatment during normal conditions and as a backup during heavy rain, while the municipal system serves as both primary treatment and overflow recipient. This universal approach eliminates the need for dedicated backup infrastructure and reduces overall land requirements.
Data Source
AI summary
A wastewater reuse system has a wastewater treatment system connected to a dwelling for receiving wastewater therefrom. The wastewater treatment system has a pump tank with an outlet that can be connected to a central wastewater collection system and/or a re-use recipient of treated wastewater such as an irrigation system.