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Evaluation of sustainable removal of...

Makam, Roshan.

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Evaluation of sustainable removal of DOC in the subsurface: Implications for SAT.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Evaluation of sustainable removal of DOC in the subsurface: Implications for SAT./
Author:	Makam, Roshan.
Description:	105 p.
Notes:	Source: Dissertation Abstracts International, Volume: 66-06, Section: B, page: 3291.
Contained By:	Dissertation Abstracts International66-06B.
Subject:	Engineering, Civil. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3178260
ISBN:	9780542175770

Evaluation of sustainable removal of DOC in the subsurface: Implications for SAT.
Makam, Roshan.

Evaluation of sustainable removal of DOC in the subsurface: Implications for SAT. - 105 p.

Source: Dissertation Abstracts International, Volume: 66-06, Section: B, page: 3291.

Thesis (Ph.D.)--Arizona State University, 2005.

This research focused on determining the mechanistic rate-limiting step for the removal of DOC during SAT by evaluating the effects of (1) surface area, (2) mass transfer/diffusion, (3) microbial growth, and (4) substrate utilization. This research utilized mathematical relationships and experiments to determine the relative importance of surface area as compared to travel time under saturated conditions.

ISBN: 9780542175770Subjects--Topical Terms:

783781
Engineering, Civil.

Evaluation of sustainable removal of DOC in the subsurface: Implications for SAT.
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245 1 0 $a Evaluation of sustainable removal of DOC in the subsurface: Implications for SAT.
300 $a 105 p.
500 $a Source: Dissertation Abstracts International, Volume: 66-06, Section: B, page: 3291.
500 $a Adviser: Peter Fox.
502 $a Thesis (Ph.D.)--Arizona State University, 2005.
520 $a This research focused on determining the mechanistic rate-limiting step for the removal of DOC during SAT by evaluating the effects of (1) surface area, (2) mass transfer/diffusion, (3) microbial growth, and (4) substrate utilization. This research utilized mathematical relationships and experiments to determine the relative importance of surface area as compared to travel time under saturated conditions.
520 $a Dextran was chosen as the model compound to mimic the biodegradation of complex substrates such as high molecular weight DOC. From batch experiments, it was found that the hydrolysis of dextran followed a zero order kinetics with respect to substrate concentration.
520 $a Mathematical models were developed to determine the mechanistic rate limiting step for the removal of high molecular weight DOC. The generation of the models started simple and increased in complexity. The models were limited in predicting substrate removal based on various assumptions. External mass transfer resistance effects was ruled out from the rate limiting step based on percent substrate removal and ratio of time scales. The models supported surface area and microbial growth as key factors involved in the removal of substrate.
520 $a Four reactors consisting of two different particle sizes and two different flowrates were considered for the experimental investigation based on Peclet and Reynolds numbers. The reactors all showed similar dextran removal. The biomass determined at the end of the experimentation was found to be dependent on the particle size but independent of flux. The biomass varied by a factor of 3 for a corresponding 1/3rd change in particle surface area. Sections of the reactors were analyzed for kinetics. The kinetics were zero order with respect to substrate utilization. The rate for smaller particle size was found to be higher by a factor of 2 than that of higher particle size both from batch and column experiments. Similar amounts of dextran removal and from kinetics of both batch and column experiments can be explained by the production of exoenzymes to hydrolyze compounds such as dextran. (Abstract shortened by UMI.)
590 $a School code: 0010.
650 4 $a Engineering, Civil. $3 783781
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790 1 0 $a Fox, Peter, $e advisor
790 $a 0010
791 $a Ph.D.
792 $a 2005
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3178260