Case Study
Case Study: Aeration Basin Air Flow Monitoring At A Stockholm Wastewater Plant
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Wastewater treatment plants use a number of different processes to remove pollutants from the wastewater before the water is released back into the environment. The activated sludge process is a biological treatment that uses large tanks divided into aeration basins. Compressed air delivers air to the aeration basins and a diffuser system distributes the air uniformly. The diffuser systems in turn supply air for microorganism growth and provide mixing of the suspended solids within each aeration basin. Micro-organisms decompose the biologically degradable organics in the wastewater and flocculate into a mass that settles along with the nonbiodegradable solids.
Because the aeration requires large amounts of compressed air, the cost of the compressed air becomes a big expense. It is also critical to manage the microorganism growth by controlling the amount of air that is supplied to the basins. Consequently, accurate control of the air flow is essential to the cost-effective operation and energy efficiency of an aeration basin system.
Challenge
At a wastewater treatment plant in Stockholm, Sweden, each aeration basin has several diffuser systems. Each diffuser system requires individual air flow monitoring and independent control. The air flow pipes leading to the diffusers typically do not have much straight run of pipe. This makes accurate measurement of the air flow more difficult. In addition, the air flow coming from the compressors is inconsistent. Compressors operate around the clock and the air flow demand changes throughout the day.
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Click Here To Download:
•Case Study: Aeration Basin Air Flow Monitoring At A Stockholm Wastewater Plant
SOURCE: Fluid Components International
