Technical and Economic Evaluation of the Use of Variable Speed Pumps in the Backwashing of Rapid Sand Filters

Q: How can I download an article?

To download an article from SID, first log in to the site, search for the article title, and click on the 'Download Article' option.

Q: How can I download an ISI article?

To download an ISI article on SID, enter the keyword or article title in the search bar, view the relevant results, click on the desired article, and select the 'Download Article' option.

Q: How can I access the SID database?

To access the SID database, visit SID.ir, create an account, and log in to access scientific resources.

Q: Is downloading articles from SID free?

Some articles on SID are available for free, while others require payment. Details are specified on the article's page.

azodi sina; FAZELI MOJTABA

Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: WATER AND WASTEWATER Year:2017 | Volume:28 | Issue:4 Page(s): 58-69

Download Full-Text

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Persian Verion

View:

620

Download:

Cites:

Information Journal Paper

Title

Technical and Economic Evaluation of the Use of Variable Speed Pumps in the Backwashing of Rapid Sand Filters

Author(s)

azodi sina | FAZELI MOJTABA | Issue Writer Certificate

Keywords

Rapid Sand FilterQ1

BackwashQ2

RipeningQ1

Variable Speed PumpQ1

Optimum ExpansionQ1

Abstract

It is observed that physical changes in the filter as bed media size variation, nozzle breakage, or water temperature variations lead to changes in the Backwash regime throughout the year. The remedy proposed in this article is to use Variable Speed Pumps in order to maintain a constant and steady optimum regime. In this study, experiments were performed using a full-scale single-layer Rapid Sand Filter to find the optimum bed expansions of 7-8%. In addition, previous research has shown that air and Backwash water flows need to be slowly and gradually increased to the optimum design values in order to avoid sand boil. In a typical treatment plant, this is normally controlled by globe valves, which results in the waste of energy and variation in pump and blower pressures. Application of Variable Speed Pumps has the advantage that a constant pressure can be maintained throughout to yield an optimum Backwash regime. Variable Speed Pumps provide various Backwash regimes which enable design engineers and water plant operators to determine the Optimum Expansion in sand bed filters. This range of optimum bed expansion was found to lead to such improvements as shorter filter Ripening, reduced effluent turbidity to levels below 0. 3 NTU, conservation of Backwash water by up to 15‒ 20%, and savings in Backwash pump power consumption by up to 30-50%.

Cites

No record.

References

No record.

Cite

APA: Copy

azodi, sina, & FAZELI, MOJTABA. (2017). Technical and Economic Evaluation of the Use of Variable Speed Pumps in the Backwashing of Rapid Sand Filters. WATER AND WASTEWATER, 28(4 ), 58-69. SID. https://sid.ir/paper/104163/en

Vancouver: Copy

azodi sina, FAZELI MOJTABA. Technical and Economic Evaluation of the Use of Variable Speed Pumps in the Backwashing of Rapid Sand Filters. WATER AND WASTEWATER[Internet]. 2017;28(4 ):58-69. Available from: https://sid.ir/paper/104163/en

IEEE: Copy

sina azodi, and MOJTABA FAZELI, “Technical and Economic Evaluation of the Use of Variable Speed Pumps in the Backwashing of Rapid Sand Filters,” WATER AND WASTEWATER, vol. 28, no. 4 , pp. 58–69, 2017, [Online]. Available: https://sid.ir/paper/104163/en

Related Journal Papers