Pump Station Recirculation for Hydrogen Sulphide Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In sparsely populated regions, wastewater piping systems experience prolonged stagnation, leading to anaerobic degradation and the generation of hydrogen sulphide, causing corrosion and health hazards due to unpleasant odors and toxic gas emissions, which existing solutions fail to adequately address.
Innovation Solution
A pump station arrangement with a recirculation channel and gas sensors that measure harmful fluid content, recirculating wastewater to a pre-chamber where increased oxygen contact neutralizes hydrogen sulphide through reaction with microorganisms, preventing gas buildup and corrosion, and maintaining a hermetically sealed pre-chamber to control emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wastewater is transported through long piping in sparsely populated regions, then the pump station can serve scattered households, but the wastewater stagnates and generates hydrogen sulphide through anaerobic degradation
Solution Approach 1:
The patent introduces a pre-chamber where wastewater is temporarily stored and aerated before entering the pump sump. This preliminary aeration action supplies oxygen to the wastewater, preventing anaerobic degradation and hydrogen sulphide generation during the subsequent pump operation and transport.
2Stress or pressure
If pump stations are vented to the surrounding atmosphere, then pressure regulation is achieved, but hydrogen sulphide emissions cause unpleasant smells and corrosion
Solution Approach 1:
The patent creates an oxygen-rich atmosphere in the pre-chamber through continuous aeration. This modified atmosphere prevents anaerobic conditions and hydrogen sulphide formation. Additionally, the system includes corrosion protection measures for vent components exposed to the atmosphere.
3Reliability
If hydrogen sulphide concentrations increase in the pump sump, then harmful effects on maintenance staff and corrosion occur, but detecting and responding in time is difficult
Solution Approach 1:
The patent incorporates gas sensors that continuously monitor hydrogen sulphide concentrations in the pump sump. When the concentration exceeds a predetermined threshold, the system automatically activates the recirculation pump to transfer wastewater from the pump sump back to the pre-chamber for re-aeration, creating a closed-loop feedback control system that prevents harmful gas accumulation.
4Object-generated harmful factors
If chemical oxygen additives are used to prevent anaerobic degradation, then hydrogen sulphide generation is reduced, but additional chemicals and maintenance are required
Solution Approach 1:
The patent uses a recirculation system that automatically transfers wastewater from the pump sump back to the pre-chamber when hydrogen sulphide concentrations exceed thresholds. This self-regulating system eliminates the need for external chemical additives while maintaining prevention of anaerobic degradation through continuous oxygen supply in the pre-chamber.
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
Effectively reduces harmful gas concentrations below safety limits, preventing corrosion and health risks, while minimizing maintenance and odor emissions, ensuring a safer and more reliable wastewater transportation system.
Implementation Method 1
The pump station arrangement prevents different components present in the pump station to be subjected to corrosion... increased oxygen contact neutralizes hydrogen sulphide through reaction with microorganisms
Implementation Method 2
a pump sump having an outlet for effluent wastewater and an inlet that is in fluid communication with the outlet of the pre-chamber such that the wastewater is transported from the pre-chamber to the pump sump under the influence of gravity
Implementation Method 3
maintaining a hermetically sealed pre-chamber to control emissions
Data Source
AI summary
A pump station arrangement for removing harmful fluids from wastewater and a method for removing harmful fluids from wastewater in such a pump station arrangement. The pump station arrangement includes a pre-chamber, a pump sump, a recirculation channel extending from the pump sump to the pre-chamber, and a gas sensor arranged in the pump sump and configured to measure the content of harmful fluids in the form of gas in the pump sump. The pump station arrangement is configured to recirculate the wastewater via the recirculation channel from the pump sump to the pre-chamber if the measured content of harmful fluids in the form of gas in the pump sump exceed a predetermined value. Also disclosed is.