Energy Optimization and Management at 7 HRSD Wastewater Treatment Plants Lead to Large Energy Savings

Alito, Christina L.; Spalding, Stephanie; Reardon, Dave; Raike, Rick; Pressey, Sherman

doi:10.2175/193864715819558550

Cited by 1 publication

(1 citation statement)

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“…Figure 10 shows that aeration is the highest contributor in the overall energy demand, representing around 70%–75% of the total energy requirements, which is in accordance with existing knowledge (Alito et al. 2015; Rosso, Iranpour, & Stenstrom, 2005; WEF, 2009).…”

Section: Resultssupporting

confidence: 87%

Oxygen transfer and plant‐wide energy assessment of primary screening in WRRFs

Pasini

Garrido-Baserba

Ahmed

et al. 2020

Water Environment Research

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Primary screening is gaining interest as a method to achieve removal performances comparable to primary clarification while reducing the footprint and increasing operational elasticity. Aeration efficiency indicators in a pilot sequential batch reactor (SBR) and a full scale water resource recovery facility (WRRF) were investigated after the implementation of rotating belt filters/screens (RBF). To compare the impact between screened (350 μm) and nonscreened primary influent, two identical treatment lines were monitored using off‐gas and respirometric measurements. The study provides the first result on improved oxygen transfer efficiency due to primary screening. Consistent aeration efficiency improvements of 27% and 20% between screened and nonscreened were obtained at pilot and full scale, respectively. Changes in aeration efficiency and carbon redirection were integrated into a set of models to investigate the primary screening impact on the WRRF energy balance. While the plant‐wide assessment for different scenarios improved the energy balance up to 15%, a detailed comparative analysis between various treatment schemes gained insight into the advantages and limitations of the energetic sustainability of primary screening. Practitioner points Aeration efficiency improved 27% at pilot scale Aeration efficiency improved 20% at full scale. Use of primary screening can improve the energy balance up to 15 Assessment of advantages and limitations of primary screening.

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Section: Resultssupporting

confidence: 87%