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Evaluation of wastewater solids and ...

Madge, Bethany Ann.

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Evaluation of wastewater solids and their relevance in ultraviolet disinfection.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Evaluation of wastewater solids and their relevance in ultraviolet disinfection./
Author:	Madge, Bethany Ann.
Description:	220 p.
Notes:	Major Professor: James N. Jensen.
Contained By:	Dissertation Abstracts International63-12B.
Subject:	Engineering, Environmental. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3076507
ISBN:	0493968598

Evaluation of wastewater solids and their relevance in ultraviolet disinfection.
Madge, Bethany Ann.

Evaluation of wastewater solids and their relevance in ultraviolet disinfection. - 220 p.

Major Professor: James N. Jensen.

Thesis (Ph.D.)--State University of New York at Buffalo, 2003.

The study data support two methods of pretreatment prior to UV disinfection. The benefits gained from using filtration and the blending technique as pretreatment methods were similar.

ISBN: 0493968598Subjects--Topical Terms:

783782
Engineering, Environmental.

Evaluation of wastewater solids and their relevance in ultraviolet disinfection.
LDR:03421nam 2200349 a 45 001 935012
005 20110509
008 110509s2003 eng d
020 $a 0493968598
035 $a (UnM)AAI3076507
035 $a AAI3076507
040 $a UnM $c UnM
100 1 $a Madge, Bethany Ann. $3 1258706
245 1 0 $a Evaluation of wastewater solids and their relevance in ultraviolet disinfection.
300 $a 220 p.
500 $a Major Professor: James N. Jensen.
500 $a Source: Dissertation Abstracts International, Volume: 63-12, Section: B, page: 6027.
502 $a Thesis (Ph.D.)--State University of New York at Buffalo, 2003.
520 $a The study data support two methods of pretreatment prior to UV disinfection. The benefits gained from using filtration and the blending technique as pretreatment methods were similar.
520 $a As ultraviolet radiation (UV) emerges as the primary alternative to chlorination in wastewater disinfection, the primary factors affecting UV disinfection efficiency must be investigated thoroughly. Research shows that the suspended solids content of wastewater has a major impact on UV disinfection efficiency. Yet attempts to correlate disinfection efficiency with common measurements of solids, such as TSS and turbidity, have not been successful.
520 $a This dissertation develops and employs a new method of evaluating wastewater solids and their relevance in ultraviolet wastewater disinfection. A fractionation technique was developed to separate particle-associated bacteria into small, medium, and large fractions based on particle size. A blending technique was incorporated to release bacteria from their particle associations. Wastewater from two wastewater treatment plants employing different treatment processes, pure oxygen activated sludge and rotating biological contactors, was used throughout the study.
520 $a The results of these techniques show that particle size is significant in UV disinfection efficiency. The small particle size fraction of the wastewater (<5 μm) consistently produced a faster rate of disinfection than the large fraction (>20 μm), with the whole unaltered sample in between the two extremes. The medium fraction disinfection rate was variable, but generally close to the small fraction. Tailing was observed only in the large fraction. Approximately one percent of the measurable bacteria in the large fraction contributed to tailing.
520 $a Evidence of particle shading was observed with only one wastewater. Evidence of particle shielding was observed with both wastewaters. The relative significance of particle shielding was almost double that of particle shading where both phenomena existed.
520 $a Reconstruction of the original sample's disinfection curve by a weighted addition of the three size fractions was largely successful over the log linear section of the dose-response curve. Reconstruction exercises using a correlation between the initial bacterial concentration of the large fraction and TSS to estimate the percent contribution of the large fraction also were largely successful.
590 $a School code: 0656.
650 4 $a Engineering, Environmental. $3 783782
650 4 $a Engineering, Sanitary and Municipal. $3 1018731
650 4 $a Environmental Sciences. $3 676987
690 $a 0554
690 $a 0768
690 $a 0775
710 2 0 $a State University of New York at Buffalo. $3 1017814
773 0 $t Dissertation Abstracts International $g 63-12B.
790 $a 0656
790 1 0 $a Jensen, James N., $e advisor
791 $a Ph.D.
792 $a 2003
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3076507