| DOI: | 10.1016/j.watres.2018.08.029
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| Scopus记录号: | 2-s2.0-85051825686
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| 论文题名: | Phagotrophic microalgae production from waste activated sludge under non-sterile conditions |
| 作者: | Xiao S.; Ju L.-K.
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| 刊名: | Water Research
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| ISSN: | 431354
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| 出版年: | 2018
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| 卷: | 145 | | 起始页码: | 190
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| 结束页码: | 197
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| 语种: | 英语
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| 英文关键词: | Alkaline treatment
; Microalgae production
; Nutrient recovery
; Phagotrophic algae
; Ultrasonication
; Waste activated sludge
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| Scopus关键词: | Algae
; Alkalinity
; Energy efficiency
; Growth kinetics
; Microorganisms
; Waste treatment
; Alkaline treatment
; Micro-algae
; Nutrient recovery
; Ultra-sonication
; Waste activated sludges
; Growth rate
; activated sludge
; alkalinization
; bacterium
; growth rate
; microalga
; nutrient
; phagotrophy
; reaction kinetics
; recovery method
; substrate
; ultrasonics
; activated sludge
; algal growth
; Article
; bacterial cell wall
; cell growth
; clinical assessment
; concentration process
; dry weight
; flocculation
; growth rate
; nonhuman
; Ochromonas
; Ochromonas danica
; outcome assessment
; pH
; prey
; priority journal
; solid
; ultrasound
; volatile solid
; waste activated sludge
; waste management
; algae
; Ochromonas danica
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| 英文摘要: | In this study waste activated sludge (WAS) was sonicated to release bacteria-sized volatile solids (VS) from flocs, after initial pH adjustment to 10 for higher energy efficiency. The released VS supported growth of phagotrophic alga Ochromonas danica. Initial-rate growth experiments confirmed the Monod-type kinetics but the specific cell growth rate, μ correlated with the prey-to-predator ratio, i.e., the ratio of (fed VS concentration)-to-(initial O. danica concentration), significantly better than with the VS alone, as the typical Monod dependency on soluble substrates. The best-fit kinetics had the following parameters: μmax = 0.198 h−1 and KM = 1.056 (g-VS/g-algae). Post-sonication reflocculation could render particles too large to ingest by O. danica; therefore, pH and VS effects on reflocculation were investigated. Batch cultivations were then conducted in fermentors at pH 5, under nonsterile conditions. Algae number reached 8.86 × 1010 L−1 after 20 h, corresponding to ∼2.3 g/L dry-weight and volumetric algae productivity of 2.8 g/L-day. VS reduction was 38%, giving an O. danica VS yield of 44.5%. The ultrasonication-algae process can be used to produce algae while achieving at least partial WAS treatment. © 2018 Elsevier Ltd |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/112439
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Department of Chemical and Biomolecular Engineering, The University of Akron, Akron, OH 44325, United States
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| Recommended Citation: | |
Xiao S.,Ju L.-K.. Phagotrophic microalgae production from waste activated sludge under non-sterile conditions[J]. Water Research,2018-01-01,145
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