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Biological sulfate reduction in sulf...

Vahdati Nikzad, Atosa.

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Biological sulfate reduction in sulfate-rich industrial wastewaters by anaerobic fluidized-bed reactors: Effect of electron donors.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Biological sulfate reduction in sulfate-rich industrial wastewaters by anaerobic fluidized-bed reactors: Effect of electron donors./
Author:	Vahdati Nikzad, Atosa.
Description:	253 p.
Notes:	Adviser: Massoud Pirbazari.
Contained By:	Dissertation Abstracts International69-01B.
Subject:	Engineering, Environmental. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3291765
ISBN:	9780549389590

Biological sulfate reduction in sulfate-rich industrial wastewaters by anaerobic fluidized-bed reactors: Effect of electron donors.
Vahdati Nikzad, Atosa.

Biological sulfate reduction in sulfate-rich industrial wastewaters by anaerobic fluidized-bed reactors: Effect of electron donors. - 253 p.

Adviser: Massoud Pirbazari.

Thesis (Ph.D.)--University of Southern California, 2007.

High-sulfate wastewaters are a major problem in industry because they increase the total dissolved solid content and interfere with methanogenesis, resulting in a decrease in the production of methane, which is a valuable fuel. A large variety of industries, including pulp and paper production, molasses fermentation, seafood processing, potato-starch factories, and tanneries, that produce wastewaters with a high sulfate concentration, have major problems in discharging their wastewaters. The reason for this is that the discharge of industrial wastes into water bodies is governed by National Pollutant Discharge Elimination System (NPDES) program, which limits the amount of pollutants, especially chemical oxygen demand (COD), received by the surface waters. Unfortunately, high sulfate content in the wastewater limits the usage of anaerobic methanogenesis for COD reduction.

ISBN: 9780549389590Subjects--Topical Terms:

783782
Engineering, Environmental.

Biological sulfate reduction in sulfate-rich industrial wastewaters by anaerobic fluidized-bed reactors: Effect of electron donors.
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020 $a 9780549389590
035 $a (UMI)AAI3291765
035 $a AAI3291765
040 $a UMI $c UMI
100 1 $a Vahdati Nikzad, Atosa. $3 1262957
245 1 0 $a Biological sulfate reduction in sulfate-rich industrial wastewaters by anaerobic fluidized-bed reactors: Effect of electron donors.
300 $a 253 p.
500 $a Adviser: Massoud Pirbazari.
500 $a Source: Dissertation Abstracts International, Volume: 69-01, Section: B, page: 0587.
502 $a Thesis (Ph.D.)--University of Southern California, 2007.
520 $a High-sulfate wastewaters are a major problem in industry because they increase the total dissolved solid content and interfere with methanogenesis, resulting in a decrease in the production of methane, which is a valuable fuel. A large variety of industries, including pulp and paper production, molasses fermentation, seafood processing, potato-starch factories, and tanneries, that produce wastewaters with a high sulfate concentration, have major problems in discharging their wastewaters. The reason for this is that the discharge of industrial wastes into water bodies is governed by National Pollutant Discharge Elimination System (NPDES) program, which limits the amount of pollutants, especially chemical oxygen demand (COD), received by the surface waters. Unfortunately, high sulfate content in the wastewater limits the usage of anaerobic methanogenesis for COD reduction.
520 $a Biological sulfate reduction is an effective means of removing sulfate from wastewater. Sulfate-reducing bacteria can adjust effectively to different environments, and the production of biofilm protects the bacteria from the toxic environment. The ability of the bacteria to acclimate to different pH levels, along with the possibility of toxic metal precipitation by hydrogen sulfide, have made this method a very attractive treatment alternative for wastewaters containing heavy metals.
520 $a This research has investigated the effectiveness of biological reduction in the removal of high concentrations of sulfate from wastewater. An anaerobic fluidized bed reactor (FBR) with recycle was chosen, and thermodynamic and kinetic parameters were used to evaluate best electron donors. Completely mixed batch reactor (CMBR) studies with different electron donors were conducted to investigate the feasibility of biological reduction with each electron donor. In addition, the effects of pH, temperature and carbon to sulfur ratio on sulfate reduction have been evaluated in several CMBRs. The results of the batch biokinetic studies rationalized directly to the fluidized bed bioreactor studies to perform the biological sulfate reduction from wastewater with a high level (2000 mg/L) of sulfate.
520 $a High sulfate removal efficiencies, as high as 96%, were observed, without any inhibition by produced H2S. Production of hydrogen fuel from the by-products of the experiment is proposed as a promising technology. Anaerobic biofilters have been introduced for effective removal of H2S as well as an effective alternative for producing elemental sulfur from the produced H2S. Finally, the FBR systems not only mange to remove sulfate with very high efficiencies, but this method can have a significant financial return from production of valuable products including methane, hydrogen fuel, and elemental sulfur from the by-products of the system.
590 $a School code: 0208.
650 4 $a Engineering, Environmental. $3 783782
650 4 $a Engineering, Sanitary and Municipal. $3 1018731
690 $a 0554
690 $a 0775
710 2 0 $a University of Southern California. $b Engineering (Environmental Engineering): Doctor of Philosophy. $3 1262958
773 0 $t Dissertation Abstracts International $g 69-01B.
790 $a 0208
790 1 0 $a Pirbazari, Massoud, $e advisor
790 1 0 $a Shing, Katherine S. $e committee member
790 1 0 $a Yen, Teh Fu $e committee member
791 $a Ph.D.
792 $a 2007
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3291765