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Characterization and single-stage de...

Singh, Ramnik,

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Characterization and single-stage denitrification anaerobic digestion of spent stream from the hydrolysis-fermentation-combustion process /

Record Type:	Electronic resources : Monograph/item
Title/Author:	Characterization and single-stage denitrification anaerobic digestion of spent stream from the hydrolysis-fermentation-combustion process // Ramnik Singh.
Author:	Singh, Ramnik,
Description:	1 electronic resource (118 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 61-08, Section: B.
Contained By:	Dissertations Abstracts International61-08B.
Subject:	Chemical engineering. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9943438
ISBN:	9780599451063

Characterization and single-stage denitrification anaerobic digestion of spent stream from the hydrolysis-fermentation-combustion process /
Singh, Ramnik,

Characterization and single-stage denitrification anaerobic digestion of spent stream from the hydrolysis-fermentation-combustion process /Ramnik Singh. - 1 electronic resource (118 pages)

Source: Dissertations Abstracts International, Volume: 61-08, Section: B.

The demand for ethanol as an oxygenate and octane booster in automobile fuel is growing. A number of processes are being investigated for conversion of biomass to ethanol. The Hydrolysis-Fermentation-Combustion (HFC) process for fuel ethanol production developed at the University of California Forest Products Laboratory, Richmond, California is at the stage of technology transfer following over two decades of research and development. This study addresses the technology to be used in treatment of spent streams to be discharged from this process. The treatment design combines a single stage denitrification and anaerobic digestion (SSDAD) for the biological treatment of a representative stream from this process. A typical spent stream contained a wide range of soluble organic materials including: unfermented sugars, components of the feedstocks solubilized in the hydrolysis, acid degradation products of carbohydrates, cleavage products of lignin, water-soluble extractives and phenolics, terpenes and other unfermented organic material, and nitrate ion from the nitric acid used as a catalyst in the hydrolysis reaction. Three sets of experiments were conducted in laboratory scale anaerobic digesters. Commonly available anaerobic sludge from local sewage treatment plants was used as a starter seed and was successfully acclimated to the high nitrate substrate leading to enrichment of denitrifiers. Necessary nutrients and trace elements were identified and supplied to satisfy the obligatory requirements of different groups of bacterial groups present. A major finding was the unique role of ammonium hydroxide in controlling pH leading to steady-state operation of the digester. At steady state operation the reduction in COD was 65%, the nitrate reduction was 88% and the nitrite reduction was 100%. Nitrate was reduced to safe nitrogen gas without buildup of any intermediate products. Organic material was converted to useful methane gas and carbon dioxide. The SSDAD system was shown to be effective in treating spent streams having high COD and nitrate concentrations.

English

ISBN: 9780599451063Subjects--Topical Terms:

560457
Chemical engineering.
Subjects--Index Terms:

Anaerobic

Characterization and single-stage denitrification anaerobic digestion of spent stream from the hydrolysis-fermentation-combustion process /
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100 1 $a Singh, Ramnik, $e author. $3 3815759
245 1 0 $a Characterization and single-stage denitrification anaerobic digestion of spent stream from the hydrolysis-fermentation-combustion process / $c Ramnik Singh.
264 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 1998
300 $a 1 electronic resource (118 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Dissertations Abstracts International, Volume: 61-08, Section: B.
500 $a Publisher info.: Dissertation/Thesis.
500 $a Advisors: Brink, David L.; Wilcox, W. Wayne.
502 $b Ph.D. $c University of California, Berkeley $d 1998.
520 $a The demand for ethanol as an oxygenate and octane booster in automobile fuel is growing. A number of processes are being investigated for conversion of biomass to ethanol. The Hydrolysis-Fermentation-Combustion (HFC) process for fuel ethanol production developed at the University of California Forest Products Laboratory, Richmond, California is at the stage of technology transfer following over two decades of research and development. This study addresses the technology to be used in treatment of spent streams to be discharged from this process. The treatment design combines a single stage denitrification and anaerobic digestion (SSDAD) for the biological treatment of a representative stream from this process. A typical spent stream contained a wide range of soluble organic materials including: unfermented sugars, components of the feedstocks solubilized in the hydrolysis, acid degradation products of carbohydrates, cleavage products of lignin, water-soluble extractives and phenolics, terpenes and other unfermented organic material, and nitrate ion from the nitric acid used as a catalyst in the hydrolysis reaction. Three sets of experiments were conducted in laboratory scale anaerobic digesters. Commonly available anaerobic sludge from local sewage treatment plants was used as a starter seed and was successfully acclimated to the high nitrate substrate leading to enrichment of denitrifiers. Necessary nutrients and trace elements were identified and supplied to satisfy the obligatory requirements of different groups of bacterial groups present. A major finding was the unique role of ammonium hydroxide in controlling pH leading to steady-state operation of the digester. At steady state operation the reduction in COD was 65%, the nitrate reduction was 88% and the nitrite reduction was 100%. Nitrate was reduced to safe nitrogen gas without buildup of any intermediate products. Organic material was converted to useful methane gas and carbon dioxide. The SSDAD system was shown to be effective in treating spent streams having high COD and nitrate concentrations.
546 $a English
590 $a School code: 0028
650 4 $a Chemical engineering. $3 560457
650 4 $a Wood. $3 540142
650 4 $a Technology. $3 531676
650 4 $a Energy. $3 876794
650 4 $a Wood sciences. $3 3168288
653 $a Anaerobic
653 $a Combustion
653 $a Denitrification
653 $a Hydrolysis-fermentation-combustion
653 $a Single-stage
653 $a Spent stream
690 $a 0542
690 $a 0746
690 $a 0791
710 2 $a University of California, Berkeley. $e degree granting institution. $3 3765948
720 1 $a Brink, David L. $e degree supervisor.
720 1 $a Wilcox, W. Wayne $e degree supervisor.
773 0 $t Dissertations Abstracts International $g 61-08B.
790 $a 0028
791 $a Ph.D.
792 $a 1998
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9943438