Cost-Effective Design and Operation of Activated Sludge Aeration Systems using Process Modeling

Sawyer, Linda K.; Appleton, A.; Ross, Adam; Slezak, Lloyd; Bartlett, Jim; Grillo, Tim

doi:10.2175/193864708788809581

Cited by 1 publication

(1 citation statement)

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“…These tools have become very useful to better assess diurnal and seasonal variations in air demands and reduced air demand if aeration control systems are employed. Sawyer et al 2008 demonstrated significant cost savings by quantifying how often specific blower equipment will likely be in operation and employing smaller jockey blowers to lower the overall energy demand of a facility during its operational lifetime.…”

Section: Improvements In Aeration Control Systems and Online Instrumementioning

confidence: 99%

How Oversized Blower Designs Became an Industry Standard

Rauch-Williams¹,

Pretorious²,

Reardon³

2013

proc water environ fed

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The paper discusses how current practices for aeration system design for domestic wastewater facilities that can lead to oversized blowers. Oversized aeration blowers limit operational flexibility and prevent the optimization of power use. The conservative assumptions made by design engineers, facility owners, and state agencies during the design process often result in blowers whose capacity far exceeds that needed for nearly all operating conditions over the lifespan of the blowers. Too much air, or lack of ability to control air, is one of the most common problems in biological nutrient removal (BNR) processes. Consistently providing too much process air not only wastes power and increases operating cost, but it can compromise performance by increasing effluent concentrations of phosphorus, nitrogen and suspended solids. Aeration of activated sludge accounts for 40 to 60% of a conventional wastewater plant's total power requirements. To minimize energy costs in their facilities, owners need blowers and aeration systems that are able to supply just as much air as needed by the biological treatment process.

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Section: Improvements In Aeration Control Systems and Online Instrumementioning

confidence: 99%