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Development of a computer model to p...

Schwartz, Gregory.

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Development of a computer model to predict oxygen, inorganic carbon and inorganic nitrogen concentrations in the partitioned aquaculture system.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Development of a computer model to predict oxygen, inorganic carbon and inorganic nitrogen concentrations in the partitioned aquaculture system./
作者:	Schwartz, Gregory.
面頁冊數:	296 p.
附註:	Source: Dissertation Abstracts International, Volume: 65-09, Section: B, page: 4762.
Contained By:	Dissertation Abstracts International65-09B.
標題:	Engineering, Environmental. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3146218
ISBN:	049606570X

Development of a computer model to predict oxygen, inorganic carbon and inorganic nitrogen concentrations in the partitioned aquaculture system.
Schwartz, Gregory.

Development of a computer model to predict oxygen, inorganic carbon and inorganic nitrogen concentrations in the partitioned aquaculture system. - 296 p.

Source: Dissertation Abstracts International, Volume: 65-09, Section: B, page: 4762.

Thesis (Ph.D.)--Clemson University, 2004.

A finite element, finite difference simulation model utilizing deterministic and empirical submodels capable of predicting time dependent dynamics of oxygen, inorganic carbon and inorganic nitrogen concentrations within Clemson University's Partitioned Aquaculture System (PAS) was developed, calibrated, and a sensitivity analysis was carried out. The model's dynamic behavior was calibrated and validated using three years of data (1999--2001) obtained from operation of a two-acre PAS unit and five years of data (1997--2001) from operation of six 1/3-acre PAS units.

ISBN: 049606570XSubjects--Topical Terms:

783782
Engineering, Environmental.

Development of a computer model to predict oxygen, inorganic carbon and inorganic nitrogen concentrations in the partitioned aquaculture system.
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245 1 0 $a Development of a computer model to predict oxygen, inorganic carbon and inorganic nitrogen concentrations in the partitioned aquaculture system.
300 $a 296 p.
500 $a Source: Dissertation Abstracts International, Volume: 65-09, Section: B, page: 4762.
500 $a Adviser: David E. Brune.
502 $a Thesis (Ph.D.)--Clemson University, 2004.
520 $a A finite element, finite difference simulation model utilizing deterministic and empirical submodels capable of predicting time dependent dynamics of oxygen, inorganic carbon and inorganic nitrogen concentrations within Clemson University's Partitioned Aquaculture System (PAS) was developed, calibrated, and a sensitivity analysis was carried out. The model's dynamic behavior was calibrated and validated using three years of data (1999--2001) obtained from operation of a two-acre PAS unit and five years of data (1997--2001) from operation of six 1/3-acre PAS units.
520 $a Calibration of system parameters revealed half saturation coefficients for light inhibition for photosynthesis (Ks PAR) and oxygen inhibition for sediment demand (Ks other). Ks PAR varied as a function of particulate organic carbon (POC) while Ks other may shift from a value of 4 to 8 for new ponds to a value of 0.5 to 1 for aged ponds.
520 $a System oxygen concentration, pH and total ammonia nitrogen (TAN) concentration was predicted at three feed levels, 150, 200 and 300 Lb/acre-day, for four secchi disk visibilities (SDV), 5, 10, 15 and 20 cm and four water column total alkalinities, 1.5, 2, 3 and 4 meq/L.
520 $a Predicted peak maximum oxygen concentrations in the algal raceway decrease as feed increases (from 150 to 300 Lb/A-day) and as SDV increases (from 5 cm to 20 cm). Simulated maximum oxygen output range from 21 to 27 mg/L with SDV of 5 cm falling to 17 to 19 mg/L with SDV of 20 cm for 150 Lb/A-day feed level, from 22 to 23 mg/L with SDV of 5 cm falling to 15 mg/L with SDV of 20 cm for 200 Lb/A-day feed level and 16 mg/L with SDV of 5 cm falling to 10 mg/L with SDV of 20 cm for 300 Lb/A-day. Daily minimum oxygen concentrations decrease slightly as feed level increases, from 2 to 4 mg/L at 150 Lb/A-day (5 and 20 cm SDV) to 1.5 and 3 mg/L at 200 Lb/A-day (5 and 20 cm SDV) to 0.5 and 1 mg/L at 300 Lb/A-day (5 and 20 cm SDV). Total alkalinity did not impact oxygen concentration unless the system was carbon limited. Examination of the oxygen mass balance suggested that net photosynthesis increased from 190,000 g 02/2A-dayat 20 cm to 280,000 g O2/2A-day at 5 cm SDV and that "other demand" increased from 110,000 g O2/2A-day (150 Lb/A-day feed) to 225,000 g O2/2A-day (300 Lb/A-day). Fish respiration values suggested that at high feed levels fish respiration was inhibited due to low dissolved oxygen. (Abstract shortened by UMI.)
590 $a School code: 0050.
650 4 $a Engineering, Environmental. $3 783782
650 4 $a Agriculture, Fisheries and Aquaculture. $3 1020913
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710 2 0 $a Clemson University. $3 997173
773 0 $t Dissertation Abstracts International $g 65-09B.
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