Sludge Blanket Formation and Its Effects on Secondary Clarifier Performance

Peng, Weihua; Rigdon, John; Russell, G.L.

doi:10.1061/(asce)0733-9372(2007)133:7(758)

Cited by 2 publications

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“…after sodiumization roasting, so it is more economical and efficient to use water as the leaching agent. In 1912, Bleecker first published a patent on the sodium roasting‐water leaching process of vanadium extraction [134] . After continuous research by scientists, it has now become the world‘s main vanadium extraction process [36]…”

Section: Extraction and Recovery Of Vanadiummentioning

confidence: 99%

Will Vanadium‐Based Electrode Materials Become the Future Choice for Metal‐Ion Batteries?

et al. 2022

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Metal-ion batteries have emerged as promising candidates for energy storage system due to their unlimited resources and competitive price/performance ratio. Vanadium-based compounds have diverse oxidation states rendering various openframeworks for ions storage. To date, some vanadium-based polyanionic compounds have shown great potential as highperformance electrode materials. However, there has been a growing concern regarding the cost and environmental risk of vanadium. In this Review, all links in the industry chain of vanadium-based electrodes were comprehensively summarized, starting with an analysis of the resources, applications, and price fluctuation of vanadium. The manufacturing processes of the vanadium extraction and recovery technologies were discussed. Moreover, the commercial potentials of some typical electrode materials were critically appraised. Finally, the environmental impact and sustainability of the industry chain were evaluated. This critical Review will provide a clear vision of the prospects and challenges of developing vanadium-based electrode materials.

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Section: Extraction and Recovery Of Vanadiummentioning

confidence: 99%

Will Vanadium‐Based Electrode Materials Become the Future Choice for Metal‐Ion Batteries?

et al. 2022

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“…al, 1993). But, Peng et al (2007) also found that ESS could be low and stable as long as the sludge blanket level was lower than the critical level which is the maximum blanket level the clarifier can hold without losing a lot of solids. The WERF/CRTC protocol for evaluating secondary clarifier performance (Wahlberg, 2001) stated that a well-designed stress test is a good method to obtain data for establishing rating curves of operation parameters for the test clarifier.…”

Section: Introductionmentioning

confidence: 96%

Can Your Secondary Clarifiers Handle More Flow? - A Stress Test Can Tell

Peng¹,

Blagsvedt²,

Farnham³

et al. 2009

proc water environ fed

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Secondary clarifiers are a critical element in a wastewater treatment process. They provide an important gravity thickening function for the mixed liquor (ML) to produce thickened return biological solids to aeration basins and to prevent solids loss to the final effluent. For many wastewater treatment facilities, secondary clarifiers are often the bottle neck of the treatment system. The peak capacity of the clarifiers is impacted by many factors, such as system biomass inventory, ML settling characteristics, and clarifier physical geometry. In this paper, a sludge state point analysis was used for planning a clarifier stress test. Based on the results of the state point analysis, a series of hydraulic stress tests were successfully conducted which demonstrated the testing clarifiers had a capacity to handle two times the design peak flow without elevated secondary effluent total suspended solids if the system solids inventory was controlled at the desired level. The test results rationally matched the state point analysis prediction. The important conclusions from the stress tests can provide critical information for developing facility expansion plan and de-bottlenecking plant peak capacity, as well as for optimizing performance during peak wet weather operation.

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Sludge Blanket Formation and Its Effects on Secondary Clarifier Performance

Cited by 2 publications

References 0 publications

Will Vanadium‐Based Electrode Materials Become the Future Choice for Metal‐Ion Batteries?

Will Vanadium‐Based Electrode Materials Become the Future Choice for Metal‐Ion Batteries?

Can Your Secondary Clarifiers Handle More Flow? - A Stress Test Can Tell

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