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

The role of algae in disinfection pr...

Liu, Lei.

FindBook

Google Book

Amazon

博客來

The role of algae in disinfection processes in wastewater stabilization ponds.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The role of algae in disinfection processes in wastewater stabilization ponds./
作者:	Liu, Lei.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2018,
面頁冊數:	289 p.
附註:	Source: Dissertation Abstracts International, Volume: 76-02C.
Contained By:	Dissertation Abstracts International76-02C.
標題:	Civil engineering. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10799595

The role of algae in disinfection processes in wastewater stabilization ponds.
Liu, Lei.

The role of algae in disinfection processes in wastewater stabilization ponds. - Ann Arbor : ProQuest Dissertations & Theses, 2018 - 289 p.

Source: Dissertation Abstracts International, Volume: 76-02C.

Thesis (Ph.D.)--Queen's University (Canada), 2018.

This thesis is an investigation of pathogen removal in wastewater stabilization ponds (WSPs). WSPs are sustainable alternatives to conventional wastewater treatment, requiring minimal energy input and low costs. They have the capability to effectively attenuate nutrients as well as pathogenic microorganisms. Disinfection in WSPs is a complex process, which can be influenced by a number of mechanisms and environmental factors, such as pH, dissolved oxygen (DO) and temperature. Due to long retention time in these systems, algal activities are often expected during warm seasons. Their presence may have effects on the complex interaction between biological communities and water chemistry. This thesis aimed to assess the role of algae in disinfection in WSP systems. Two algae (Mougeotia sp. and Hydrodicty sp.) that were collected from the Amherstview WSP were noted to increase both pH and DO when cultivated under laboratory conditions. This finding was corroborated by the multivariate statistical analysis where the correlation relationships between a wide range of water quality parameters (pH, DO, temperature, chlorophyll, phycocyanin, Escherichia coli (E. coli), total coliforms (TC), Enterococci, Clostridium perfringens (C. perfringens), ammonium, nitrate, total nitrogen, phosphate total phosphorus and COD) were investigated. As such, the presence of algae is believed to contribute to the high pH and DO levels in the WSP system. The inactivation of E. coli and total coliforms were found to increase with increasing pH. Intermediate DO level (8.6 mg/L) appeared to support the survival of both E. coli and total coliforms, while both high and low DO levels (20 mg/L and 1 mg/L, respectively) could facilitate their removal and inactivation. This would suggest that the presence of algae leading to high pH and DO could potentially promote the removal of E. coli, total coliforms and Enterococci. Two additional indicator organisms (Enterococci and C. perfringens) showed different inactivation trends compared to traditional indicator organisms (E. coli, fecal coliforms or TC). C. perfringens were tolerant to the pH, DO and temperature ranges investigated. They exhibited weaker correlations with both E. coli and TC. This finding suggested that Enterococci and C. perfringens can be proposed as potential indicator organisms.Subjects--Topical Terms:

860360
Civil engineering.

The role of algae in disinfection processes in wastewater stabilization ponds.
LDR:03276nmm a2200289 4500 001 2162169
005 20180927111922.5
008 190424s2018 ||||||||||||||||| ||eng d
035 $a (MiAaPQ)AAI10799595
035 $a (MiAaPQ)QueensUCan197423863
035 $a AAI10799595
040 $a MiAaPQ $c MiAaPQ
100 1 $a Liu, Lei. $3 1280843
245 1 4 $a The role of algae in disinfection processes in wastewater stabilization ponds.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2018
300 $a 289 p.
500 $a Source: Dissertation Abstracts International, Volume: 76-02C.
500 $a Advisers: Geof Hall; Pascale Champagne.
502 $a Thesis (Ph.D.)--Queen's University (Canada), 2018.
520 $a This thesis is an investigation of pathogen removal in wastewater stabilization ponds (WSPs). WSPs are sustainable alternatives to conventional wastewater treatment, requiring minimal energy input and low costs. They have the capability to effectively attenuate nutrients as well as pathogenic microorganisms. Disinfection in WSPs is a complex process, which can be influenced by a number of mechanisms and environmental factors, such as pH, dissolved oxygen (DO) and temperature. Due to long retention time in these systems, algal activities are often expected during warm seasons. Their presence may have effects on the complex interaction between biological communities and water chemistry. This thesis aimed to assess the role of algae in disinfection in WSP systems. Two algae (Mougeotia sp. and Hydrodicty sp.) that were collected from the Amherstview WSP were noted to increase both pH and DO when cultivated under laboratory conditions. This finding was corroborated by the multivariate statistical analysis where the correlation relationships between a wide range of water quality parameters (pH, DO, temperature, chlorophyll, phycocyanin, Escherichia coli (E. coli), total coliforms (TC), Enterococci, Clostridium perfringens (C. perfringens), ammonium, nitrate, total nitrogen, phosphate total phosphorus and COD) were investigated. As such, the presence of algae is believed to contribute to the high pH and DO levels in the WSP system. The inactivation of E. coli and total coliforms were found to increase with increasing pH. Intermediate DO level (8.6 mg/L) appeared to support the survival of both E. coli and total coliforms, while both high and low DO levels (20 mg/L and 1 mg/L, respectively) could facilitate their removal and inactivation. This would suggest that the presence of algae leading to high pH and DO could potentially promote the removal of E. coli, total coliforms and Enterococci. Two additional indicator organisms (Enterococci and C. perfringens) showed different inactivation trends compared to traditional indicator organisms (E. coli, fecal coliforms or TC). C. perfringens were tolerant to the pH, DO and temperature ranges investigated. They exhibited weaker correlations with both E. coli and TC. This finding suggested that Enterococci and C. perfringens can be proposed as potential indicator organisms.
590 $a School code: 0283.
650 4 $a Civil engineering. $3 860360
650 4 $a Environmental engineering. $3 548583
690 $a 0543
690 $a 0775
710 2 $a Queen's University (Canada). $3 1017786
773 0 $t Dissertation Abstracts International $g 76-02C.
790 $a 0283
791 $a Ph.D.
792 $a 2018
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10799595