Textile Washer Water Reuse Control Using Selective Wastewater Sensing
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Solution Overview
Problem
Commercial textile cleaning facilities face significant water waste and inefficiency due to the high volumes of wastewater generated from textile washing processes, which is often not effectively recycled or reused, leading to environmental and economic challenges.
Innovation Solution
A water recycle and reuse system that includes sensors to analyze and selectively recycle wastewater by measuring characteristics such as turbidity, total suspended solids, and chemical composition, allowing for controlled delivery of treated water back to textile washers or disposal, using chemical and physical treatments like flocculants, dissolved air flotation, and membrane filtration systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If all wastewater is discarded after treatment, then water quality is maintained, but water waste increases significantly
Solution Approach 1:
The wastewater stream is segmented into multiple quality categories using sensors that measure turbidity, color, and chemical composition. The control system divides the wastewater flow into different recirculation paths based on quality level, with higher quality water recirculated to sensitive processes and lower quality water discarded or used in less sensitive applications. This segmentation allows maximum water recovery while maintaining quality requirements.
Solution Approach 2:
Real-time sensors continuously monitor wastewater characteristics including turbidity, color, and chemical composition. This feedback is fed to the control system which dynamically adjusts recirculation valve positions and pump operations to maintain water quality within specified thresholds while maximizing the volume of water recirculated back to the washing process.
2Loss of substance
If wastewater is recirculated without selective analysis, then water waste is reduced, but water quality deteriorates and staining occurs
Solution Approach 1:
Before wastewater is recirculated to the washing process, sensors perform preliminary analysis of its quality characteristics including color, turbidity, and chemical composition. Based on this preliminary assessment, the control system determines whether the water meets the quality thresholds required for recirculation to specific washing processes, preventing stained textiles from occurring in the first place.
Solution Approach 2:
Different recirculation paths are provided for wastewater of different quality levels. Higher quality wastewater is directed to recirculation paths serving sensitive washing processes where staining risk is critical, while lower quality wastewater is directed to less sensitive processes or discarded. This local quality matching ensures each recirculation application receives water of appropriate quality.
3Reliability
If comprehensive sensor analysis is implemented, then water quality control is improved, but system complexity increases
Solution Approach 1:
Complex manual water quality assessment and decision-making processes are replaced with automated sensor systems and control logic. Sensors continuously measure turbidity, color, and chemical composition, while the control system automatically processes this data and adjusts recirculation operations, eliminating the need for manual sampling and analysis while improving reliability.
Solution Approach 2:
The system monitors and controls multiple water quality parameters simultaneously (turbidity, color, chemical composition) and uses these parameter changes to dynamically adjust recirculation decisions. By establishing threshold values for each parameter, the system simplifies the control logic while maintaining comprehensive quality oversight through multi-parameter monitoring.
4Adaptability or versatility
If selective recirculation based on multiple parameters is used, then water quality suitability is optimized, but measurement and control difficulty increases
Solution Approach 1:
The sensor system and control logic are designed to handle multiple water quality parameters and recirculation decisions through a unified platform. The same sensor array and control system serve all recirculation paths and all washing processes, providing universal functionality that simplifies measurement and control despite the multi-parameter nature of the problem.
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 system enables the segregation and reuse of wastewater, reducing water waste, achieving significant environmental and economic benefits by recycling a portion of the water that would otherwise be discarded, while maintaining water quality suitable for textile washing processes.
Implementation Method 1
the turbidity or total suspended solids of the clarified water indicating the amount liberated soil in the water
Implementation Method 2
chemical treatments (e.g., addition of flocculants, chelating agents)
Implementation Method 3
processing in a dissolved air floatation system to remove particulates
Implementation Method 4
processing through a filtration system
Data Source
AI summary
A water recycle system may be implemented to analyze and selectively recycle wastewater generated by an industrial textile washer. In some examples, wastewater generated by the industrial textile washer undergoes various treatment processes, such as chemical treatments (e.g., addition of flocculants, chelating agents) and/or physical separation treatments (e.g., processing in a dissolved air floatation system to remove particulates). This can generate a clarified wastewater. One or more sensors can be positioned to measure characteristics of the clarified wastewater, such as the color of the clarified wastewater and corresponding tendency to stain textile articles if recycled to the washer. Based on measurements from the one or more sensors, the clarified wastewater can be recycled for reuse in the textile washer or, alternatively, discarded.