DOI: 10.1016/j.watres.2018.06.020
Scopus记录号: 2-s2.0-85049324724
论文题名: Worse than cell lysis: The resilience of Oscillatoria sp. during sludge storage in drinking water treatment
作者: Sun J. ; Xu H. ; Pei H. ; Jin Y. ; Li H. ; Ma C.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 142 起始页码: 405
结束页码: 414
语种: 英语
英文关键词: Cylindrospermopsin
; Geosmin
; Oscillatoria sp.
; PAFC
; Sludge storage
Scopus关键词: Algae
; Bacteria
; Chemical water treatment
; Chlorination
; Chlorine compounds
; Chlorophyll
; Coagulation
; Control systems
; Cytology
; Enzymes
; Phosphoric acid fuel cells (PAFC)
; Potable water
; Anoxic environment
; Cylindrospermopsin
; Environmental stress
; Geosmin
; Microcystis aeruginosa
; Oscillatoria sp
; Sludge storage
; Superoxide dismutase activities
; Cells
; chlorophyll a
; cylindrospermopsin
; drinking water
; ferric chloride
; ferrous ion
; geosmin
; malonaldehyde
; superoxide dismutase
; cell
; chlorophyll a
; coagulation
; control system
; cyanobacterium
; drinking water
; environmental stress
; enzyme activity
; growth rate
; metabolite
; organic compound
; plankton
; pollutant removal
; sludge
; water treatment
; Article
; bacterial cell
; cell viability
; controlled study
; Cylindrospermopsis raciborskii
; cytolysis
; environmental stress
; enzyme activity
; growth rate
; Microcystis aeruginosa
; nonhuman
; Oscillatoria
; priority journal
; sludge
; storage
; water treatment
; algae
; Cylindrospermopsis raciborskii
; Microcystis aeruginosa
; Oscillatoria sp.
英文摘要: Benthic Oscillatoria sp. may form dense surface blooms especially under eutrophic and calm conditions, which poses a threat to drinking water safety because it can produce toxic and odorous metabolites. This is the first study to investigate the effect of the conventional coagulant polyaluminium ferric chloride (PAFC) on removal of Oscillatoria sp., and the behavior of Oscillatoria sp. cells in sludges formed from different dosages of PAFC (control, optimum, and overdose system) during storage was also studied. Oscillatoria sp. cells can be removed efficiently by coagulation of PAFC. The adverse environmental stresses of sludge, such as lack of light and anoxic environment, decrease cell viability and induce the increase of superoxide dismutase activity (SOD) and malondialdehyde content (MDA) in Oscillatoria sp. cells during the first 4 days. Because Oscillatoria sp. can adapt to the low-light and hypoxic circumstances in sludge gradually, the cells regrow with prolonged storage time. Compared to planktonic Microcystis aeruginosa and Cylindrospermopsis raciborskii, regrowth of Oscillatoria sp. during storage may present a bigger threat, even though Microcystis aeruginosa and Cylindrospermopsis raciborskii cells will be damaged and release toxic compounds. Growth rates of algae in coagulated systems were lower than that in control system because of the restriction of flocs. It is worth noting that the chlorophyll a level was increased by a factor of 3.5 in the optimal-dose system, and worse, the overdose system increased by a factor of 6 in chlorophyll a after 8 d storage due to the benefit of higher Fe levels. Concentrations of extracellular geosmin and cylindrospermopsin also increased during storage, especially after 4 d, and varied in the following sequence for a given storage duration: control system > overdose system > optimum system. Overall, due to decrease of SOD and MDA in Oscillatoria sp. cells after 4 d storage, algae cells regrew rapidly, especially in overdose system. Hence, sludge should be treated within 4 d and excess PAFC dosing should be avoided. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112620
Appears in Collections: 气候减缓与适应
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作者单位: School of Environmental Science and Engineering, Shandong University, Jinan, 250100, China; Shandong Provincial Engineering Center on Environmental Science and Technology, Jinan, 250061, China
Recommended Citation:
Sun J.,Xu H.,Pei H.,et al. Worse than cell lysis: The resilience of Oscillatoria sp. during sludge storage in drinking water treatment[J]. Water Research,2018-01-01,142