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High shear rotary membrane system en...

Bendick, John Adam.

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High shear rotary membrane system enhancements for naval wastewaters.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	High shear rotary membrane system enhancements for naval wastewaters./
作者:	Bendick, John Adam.
面頁冊數:	147 p.
附註:	Source: Dissertation Abstracts International, Volume: 74-09(E), Section: B.
Contained By:	Dissertation Abstracts International74-09B(E).
標題:	Environmental engineering. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3563302
ISBN:	9781303115325

High shear rotary membrane system enhancements for naval wastewaters.
Bendick, John Adam.

High shear rotary membrane system enhancements for naval wastewaters. - 147 p.

Source: Dissertation Abstracts International, Volume: 74-09(E), Section: B.

Thesis (Ph.D.)--University of Maryland, Baltimore County, 2013.

This item must not be sold to any third party vendors.

Navy ships are floating cities, requiring infrastructure and resources while generating various wastes: bilge water, black/graywater, industrial wastewaters and solid residuals. Treatment equipment selection is based not only on reliability, operational ease and cost but also on weight and cube. Current treatment systems would benefit from efficient solids removal; however, standard equipment has not been effective, necessitating developing improved technologies.

ISBN: 9781303115325Subjects--Topical Terms:

548583
Environmental engineering.

High shear rotary membrane system enhancements for naval wastewaters.
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100 1 $a Bendick, John Adam. $3 3175773
245 1 0 $a High shear rotary membrane system enhancements for naval wastewaters.
300 $a 147 p.
500 $a Source: Dissertation Abstracts International, Volume: 74-09(E), Section: B.
500 $a Adviser: Brian E. Reed.
502 $a Thesis (Ph.D.)--University of Maryland, Baltimore County, 2013.
506 $a This item must not be sold to any third party vendors.
520 $a Navy ships are floating cities, requiring infrastructure and resources while generating various wastes: bilge water, black/graywater, industrial wastewaters and solid residuals. Treatment equipment selection is based not only on reliability, operational ease and cost but also on weight and cube. Current treatment systems would benefit from efficient solids removal; however, standard equipment has not been effective, necessitating developing improved technologies.
520 $a Membranes systems simple operation and dependability fits shipboard requirements. The high shear rotary membrane system (HSR-MS) has shown a superior ability to remove contaminants and concentrate solids. However, low throughout confines the technology to applications without space limitations. The broad research goal seeks to overcome the throughput and space limitations allowing for shipboard HSR-MS implementation.
520 $a HSR-MS often operates at high rotation (o) to improve flux (J) by maximizing shear. However, an understanding of J, o, diameter (D), and pressure provides conflicting relationships. A higher o and larger D maximizes shear (increases J), but also increases rotationally induced backpressure (decreases J). This means membrane inner areas operate under the highest pressure and lowest shear; while membrane outer areas operate under the lowest pressure and highest shear (opposite of what is desired).
520 $a To improve HSR-MS performance, J and/or D must increase. Larger D discs require operation with lower o, leading to lost shear (decreased J). This work proposes employing continuous surface cleaning (CSC) and/or backpulsing (BP) to overcome reduced shear and lost J facilitating using larger D discs.
520 $a Results showed J was highly dependent on o and D. For every 100 rpm o increase, J increased by 26 L/m2-hr. Flow (Q) was more sensitive providing &sim;1% increase in Q per mm D increase. The outer membrane third provided ≥ 50% of the total Q, while the inner third provided &sim;15%. Both BP and CSC produced higher J, proving most beneficial at lower o. J improved by &sim;75% for o500 rpm as flow conditions shifted from laminar to turbulent. Membrane inner area J improved with CSC or BP, but the outer area still produced the bulk of overall flow (&sim;80%). Combing experimentally derived flux prediction models and BP/CSC flux improvements with commercially available membrane sizes show that larger D, slower o discs can provide a 25-50% HSR-MS disc count reduction.
590 $a School code: 0434.
650 4 $a Environmental engineering. $3 548583
650 4 $a Mechanical engineering. $3 649730
650 4 $a Naval engineering. $3 3173824
690 $a 0775
690 $a 0548
690 $a 0468
710 2 $a University of Maryland, Baltimore County. $b Engineering, Civil and Environmental. $3 1023738
773 0 $t Dissertation Abstracts International $g 74-09B(E).
790 $a 0434
791 $a Ph.D.
792 $a 2013
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3563302