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Phosphorus dynamics in anaerobically...

Gungor, Kerem.

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Phosphorus dynamics in anaerobically digested dairy manure.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Phosphorus dynamics in anaerobically digested dairy manure./
作者:	Gungor, Kerem.
面頁冊數:	130 p.
附註:	Adviser: K. G. Karthikeyan.
Contained By:	Dissertation Abstracts International67-09B.
標題:	Chemistry, Agricultural. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3234820
ISBN:	9780542887994

Phosphorus dynamics in anaerobically digested dairy manure.
Gungor, Kerem.

Phosphorus dynamics in anaerobically digested dairy manure. - 130 p.

Adviser: K. G. Karthikeyan.

Thesis (Ph.D.)--The University of Wisconsin - Madison, 2006.

The focus of this study was to investigate, using laboratory-scale batch and on-farm digesters, the effect of anaerobic digestion on the speciation and water-extractability of inorganic phosphorus (P) in dairy manure. Water extraction, equilibrium chemical modeling, and spectroscopic methods were employed to determine the nature of inorganic P solid phases. Water-extractable P (WEP), which refers to the percentage of total P (TP) released as dissolved reactive P (DRP) following water extraction, was used as a stability indicator of inorganic P solid phases.

ISBN: 9780542887994Subjects--Topical Terms:

1021829
Chemistry, Agricultural.

Phosphorus dynamics in anaerobically digested dairy manure.
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245 1 0 $a Phosphorus dynamics in anaerobically digested dairy manure.
300 $a 130 p.
500 $a Adviser: K. G. Karthikeyan.
500 $a Source: Dissertation Abstracts International, Volume: 67-09, Section: B, page: 5039.
502 $a Thesis (Ph.D.)--The University of Wisconsin - Madison, 2006.
520 $a The focus of this study was to investigate, using laboratory-scale batch and on-farm digesters, the effect of anaerobic digestion on the speciation and water-extractability of inorganic phosphorus (P) in dairy manure. Water extraction, equilibrium chemical modeling, and spectroscopic methods were employed to determine the nature of inorganic P solid phases. Water-extractable P (WEP), which refers to the percentage of total P (TP) released as dissolved reactive P (DRP) following water extraction, was used as a stability indicator of inorganic P solid phases.
520 $a Batch digestion of dairy manure showed that inoculum-to-substrate ratio (ISR) could influence WEP levels at low extractant (i.e., water)-to-manure ratios. Higher volatile solids (VS) destruction and lower WEP levels were obtained for the low ISR (0.3 g VS g-1 VS) batch digesters. Using a geochemical equilibrium model (Minegl+), struvite, dicalcium phosphate dihydrate (DCPD or brushite), dicalcium phosphate anhydrous (DCPA or monetite), octacalcium phosphate (OCP), and beta-tricalcium phosphate (beta-TCP) were determined as the probable inorganic P solid phases in the water extracts of raw and anaerobically digested manure.
520 $a Analysis of manure samples from six on-farm digesters in Wisconsin showed that effluent WEP was significantly (22 to 47%) lower than that of the influent. Chemical indicated that newberyite, struvite, DCPD, DCPA, and OCP were the probable inorganic P solid phases in both influent and effluent. Using x-ray powder diffraction, struvite was identified in both influent and effluent samples from a selected on-farm digester. Analysis of the P K-edge x-ray absorption near-edge structure (XANES) spectra revealed that Mg phosphates were the predominant solid phases in the on-farm digester samples; Ca phosphates were present at lower concentrations in both the influent and effluent samples.
520 $a The overall study results are strongly suggestive of struvite being the most predominant inorganic P solid phase in both raw and anaerobically digested dairy manure. Anaerobic digestion appears capable of increasing the stability of P-containing solid phases via destruction of organic solids, thereby decreasing the water extractability of manure P. Land application of anaerobically digested manure could lower P losses from agricultural fields at least in a short-term basis.
590 $a School code: 0262.
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650 4 $a Engineering, Environmental. $3 783782
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710 2 $a The University of Wisconsin - Madison. $3 626640
773 0 $t Dissertation Abstracts International $g 67-09B.
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