東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

Nutrient and Bacterial Contamination...

Douglas, Ceilidh,

FindBook

Google Book

Amazon

博客來

Nutrient and Bacterial Contamination Assessment and Filtration Media Selection for Dairy Cattle Drinking Water Treatment /

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Nutrient and Bacterial Contamination Assessment and Filtration Media Selection for Dairy Cattle Drinking Water Treatment // Ceilidh Douglas.
作者:	Douglas, Ceilidh,
面頁冊數:	1 electronic resource (103 pages)
附註:	Source: Masters Abstracts International, Volume: 86-04.
Contained By:	Masters Abstracts International86-04.
標題:	Environmental engineering. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31561948
ISBN:	9798384483342

Nutrient and Bacterial Contamination Assessment and Filtration Media Selection for Dairy Cattle Drinking Water Treatment /
Douglas, Ceilidh,

Nutrient and Bacterial Contamination Assessment and Filtration Media Selection for Dairy Cattle Drinking Water Treatment /Ceilidh Douglas. - 1 electronic resource (103 pages)

Source: Masters Abstracts International, Volume: 86-04.

Nitrate and bacterial groundwater pollution from dairy farms and surrounding croplands is a large and growing problem not only for surrounding ecosystems, but also for the health of the cattle consuming this untreated water if present at high enough levels. Point-of-use filtration methods could provide a low-cost means of removing such contaminants to within acceptable levels, but experimentation is needed to identify acceptable media and optimal treatment designs.This thesis is divided into four main chapters; the first chapter presents an introduction to the issue, pollutant health implications, and existing treatment options within a comprehensive literature review. The second chapter aims to assess the prevalence of nitrate and bacteria levels in dairy cattle water troughs throughout several dairy farms in central California. The purpose of the second chapter is to determine whether contaminant levels are within recommended levels as well as to identify the predominant source of each contamination to inform future design aspects of a treatment system. The third chapter aims to assess different commercially available, natural media for their ability to remove nitrate and bacteria through various column filtration and batch adsorption experiments. The fourth chapter outlines preliminary field-scale experiments conducted to assess removal potential at higher flow rates as well as identifies ways to further optimize for contaminant removal.While there are no set regulations for levels of either pollutant for dairy cattle water consumption, the general recommendation of 44 ppm NO3- was exceeded in 47% of the 62 troughs, and 89% of the 44 troughs analyzed for bacterial levels exceeded the recommended 15 CFU/100 mL total coliform count for adult cattle. These results suggest a significant portion of troughs would benefit from nitrate and bacteria reduction, and when alternative water sources are unavailable, column filtration may provide a sufficient treatment option. Of the filter media tested at lab scale, powdered activated carbon (PAC) provided the highest removal efficiency and adsorption capacity for both contaminants, but the high pressure required as well as its susceptibility to reduced long-term efficiency suggests that multi-media column filtration with PAC may improve the viability for a small-scale cattle drinking water filtration treatment system. Granular activated charcoal (GAC), which has larger particle size and lower surface area was found to achieve the second highest removal rate for both contaminants with lower pressure requirements, so column filtration with mixed media including both PAC and GAC is proposed and tested at field scale. While further optimization is required for the proposed treatment system, it offers a low cost and easily implementable treatment option for improving dairy cattle drinking water in troughs.

English

ISBN: 9798384483342Subjects--Topical Terms:

548583
Environmental engineering.
Subjects--Index Terms:

Adsorption capacity

Nutrient and Bacterial Contamination Assessment and Filtration Media Selection for Dairy Cattle Drinking Water Treatment /
LDR:04318nmm a22004333i 4500 001 2435740
005 20251029060339.5
006 m o d
007 cr|nu||||||||
008 261011s2024 miu||||||m |||||||eng d
020 $a 9798384483342
035 $a (MiAaPQD)AAI31561948
035 $a AAI31561948
040 $a MiAaPQD $b eng $c MiAaPQD $e rda
100 1 $a Douglas, Ceilidh, $e author. $3 3826150
245 1 0 $a Nutrient and Bacterial Contamination Assessment and Filtration Media Selection for Dairy Cattle Drinking Water Treatment / $c Ceilidh Douglas.
264 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2024
300 $a 1 electronic resource (103 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: Masters Abstracts International, Volume: 86-04.
500 $a Advisors: Pandey, Pramod Committee members: Kisekka, Isaya; Sun, Gang.
502 $b M.S. $c University of California, Davis $d 2024.
520 $a Nitrate and bacterial groundwater pollution from dairy farms and surrounding croplands is a large and growing problem not only for surrounding ecosystems, but also for the health of the cattle consuming this untreated water if present at high enough levels. Point-of-use filtration methods could provide a low-cost means of removing such contaminants to within acceptable levels, but experimentation is needed to identify acceptable media and optimal treatment designs.This thesis is divided into four main chapters; the first chapter presents an introduction to the issue, pollutant health implications, and existing treatment options within a comprehensive literature review. The second chapter aims to assess the prevalence of nitrate and bacteria levels in dairy cattle water troughs throughout several dairy farms in central California. The purpose of the second chapter is to determine whether contaminant levels are within recommended levels as well as to identify the predominant source of each contamination to inform future design aspects of a treatment system. The third chapter aims to assess different commercially available, natural media for their ability to remove nitrate and bacteria through various column filtration and batch adsorption experiments. The fourth chapter outlines preliminary field-scale experiments conducted to assess removal potential at higher flow rates as well as identifies ways to further optimize for contaminant removal.While there are no set regulations for levels of either pollutant for dairy cattle water consumption, the general recommendation of 44 ppm NO3- was exceeded in 47% of the 62 troughs, and 89% of the 44 troughs analyzed for bacterial levels exceeded the recommended 15 CFU/100 mL total coliform count for adult cattle. These results suggest a significant portion of troughs would benefit from nitrate and bacteria reduction, and when alternative water sources are unavailable, column filtration may provide a sufficient treatment option. Of the filter media tested at lab scale, powdered activated carbon (PAC) provided the highest removal efficiency and adsorption capacity for both contaminants, but the high pressure required as well as its susceptibility to reduced long-term efficiency suggests that multi-media column filtration with PAC may improve the viability for a small-scale cattle drinking water filtration treatment system. Granular activated charcoal (GAC), which has larger particle size and lower surface area was found to achieve the second highest removal rate for both contaminants with lower pressure requirements, so column filtration with mixed media including both PAC and GAC is proposed and tested at field scale. While further optimization is required for the proposed treatment system, it offers a low cost and easily implementable treatment option for improving dairy cattle drinking water in troughs.
546 $a English
590 $a School code: 0029
650 4 $a Environmental engineering. $3 548583
650 4 $a Agricultural engineering. $3 3168406
650 4 $a Environmental science. $3 677245
650 4 $a Nutrition. $3 517777
653 $a Adsorption capacity
653 $a Bacteria
653 $a Dairy cattle
653 $a Water treatment
690 $a 0539
690 $a 0775
690 $a 0768
690 $a 0570
710 2 $a University of California, Davis. $b Biological Systems Engineering. $e degree granting institution. $3 3818627
720 1 $a Pandey, Pramod $e degree supervisor.
773 0 $t Masters Abstracts International $g 86-04.
790 $a 0029
791 $a M.S.
792 $a 2024
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31561948