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Comparison of temperature-phased, tw...

Schmit, Kathryn Healy.

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Comparison of temperature-phased, two phase, and single stage anaerobic co-digestion of municipal solid waste and primary wastewater solids.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Comparison of temperature-phased, two phase, and single stage anaerobic co-digestion of municipal solid waste and primary wastewater solids./
Author:	Schmit, Kathryn Healy.
Description:	134 p.
Notes:	Major Professor: Timothy G. Ellis.
Contained By:	Dissertation Abstracts International59-11B.
Subject:	Engineering, Civil. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9911638
ISBN:	9780599099128

Comparison of temperature-phased, two phase, and single stage anaerobic co-digestion of municipal solid waste and primary wastewater solids.
Schmit, Kathryn Healy.

Comparison of temperature-phased, two phase, and single stage anaerobic co-digestion of municipal solid waste and primary wastewater solids. - 134 p.

Major Professor: Timothy G. Ellis.

Thesis (Ph.D.)--Iowa State University, 1998.

The objective of this research was to evaluate the application of the temperature-phased process for the co-digestion of the organic fraction of municipal solid waste (OFMSW) and primary wastewater solids (PS) and to compare the process performance with both two phase and single stage anaerobic digestion. The temperature-phased (TPAD) and two phase (2P) processes both consisted of a thermophilic reactor operated at 55°C followed by a mesophilic reactor operated at 35°C. The pH of the thermophilic stage of the 2P system was controlled at 5.6, while the thermophilic stage of the TPAD system was operated at a neutral pH range. The single stage system (SS) was a single reactor operated at 35°C.

ISBN: 9780599099128Subjects--Topical Terms:

783781
Engineering, Civil.

Comparison of temperature-phased, two phase, and single stage anaerobic co-digestion of municipal solid waste and primary wastewater solids.
LDR:03189nam 2200325 a 45 001 973277
005 20110928
008 110928s1998 eng d
020 $a 9780599099128
035 $a (UMI)AAI9911638
035 $a AAI9911638
040 $a UMI $c UMI
100 1 $a Schmit, Kathryn Healy. $3 1297231
245 1 0 $a Comparison of temperature-phased, two phase, and single stage anaerobic co-digestion of municipal solid waste and primary wastewater solids.
300 $a 134 p.
500 $a Major Professor: Timothy G. Ellis.
500 $a Source: Dissertation Abstracts International, Volume: 59-11, Section: B, page: 6014.
502 $a Thesis (Ph.D.)--Iowa State University, 1998.
520 $a The objective of this research was to evaluate the application of the temperature-phased process for the co-digestion of the organic fraction of municipal solid waste (OFMSW) and primary wastewater solids (PS) and to compare the process performance with both two phase and single stage anaerobic digestion. The temperature-phased (TPAD) and two phase (2P) processes both consisted of a thermophilic reactor operated at 55°C followed by a mesophilic reactor operated at 35°C. The pH of the thermophilic stage of the 2P system was controlled at 5.6, while the thermophilic stage of the TPAD system was operated at a neutral pH range. The single stage system (SS) was a single reactor operated at 35°C.
520 $a The experiment was conducted by incrementally increasing the OFMSW percentage in the feed from 0, 20, 40, 60 to 80 percent. The performance of both the TPAD and 2P systems were greater than the SS system when the feed contained 60 and 80 percent OFMSW, due to increasing hydrolysis limitations. The TPAD, 2P, and SS systems had maximum methane yields of 0.42, 0.34, and 0.37 L/g VS fed, respectively. Maintaining syntrophic relationships between acidogenic, acetogenic, and methanogenic bacteria in the first stage of the TPAD system led to superior system performance when feeding 0, 20, and 40 percent OFMSW as compared to the both 2P and SS systems. The superior performance was characterized from VS removal and methane production. When the OFMSW content of the feed was 60 and 80 percent, the difference between the performance of the TPAD and 2P systems was less evident.
520 $a Hydrolysis rates were determined from particulate chemical oxygen demand (PCOD) in operating temperature-phased and two phase systems. Methanogenic first-order rates were determined using batch tests with inocula from operating TPAD and 2P systems. The first stage of the TPAD system had higher hydrolysis rates than the first stage of the 2P system at all conditions tested. The temperature phased system had specific hydrolysis rates ranging from 0.048 to 0.285 g PCOD/g VS.d. The two phase system had specific hydrolysis rates ranging from 0.063 to 0.190 g PCOD/g VS.d.
590 $a School code: 0097.
650 4 $a Engineering, Civil. $3 783781
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 0543
690 $a 0554
690 $a 0768
690 $a 0775
710 2 0 $a Iowa State University. $3 1017855
773 0 $t Dissertation Abstracts International $g 59-11B.
790 $a 0097
790 1 0 $a Ellis, Timothy G., $e advisor
791 $a Ph.D.
792 $a 1998
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9911638