globalchange  > 气候变化事实与影响
DOI: 10.1016/j.watres.2018.12.008
Scopus记录号: 2-s2.0-85058795794
论文题名:
Elucidating the effects of starvation and reactivation on anaerobic sulfidogenic granular sludge: Reactor performance and granular sludge transformation
作者: Wang B.; Wu D.; Dai J.; Ekama G.A.; Hao X.; Chen G.-H.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 44
结束页码: 53
语种: 英语
英文关键词: Granular sludge ; Reactivation ; Sludge flotation ; Starvation ; Sulfidogenesis
Scopus关键词: Bacteria ; Biological water treatment ; Deterioration ; Flotation ; Granular materials ; Industrial water treatment ; Organic chemicals ; Sulfur compounds ; Wastewater treatment ; Biological waste water treatment ; Extra-cellular polymeric substances ; Granular sludge ; Municipal wastewater treatment ; Performance deterioration ; Reactivation ; Starvation ; Sulfidogenesis ; Chemical oxygen demand ; extracellular polymeric substance ; polymer ; sulfate ; unclassified drug ; anoxic conditions ; bacterium ; chemical oxygen demand ; granular medium ; performance assessment ; physicochemical property ; sludge ; sulfur compound ; transformation ; wastewater ; wastewater treatment ; anaerobic sulfidogenic granular sludge ; Article ; chemical oxygen demand ; degradation ; electron ; flotation ; hydrophobicity ; nonhuman ; permeability ; porosity ; priority journal ; sludge ; sulfate reducing bacterium ; waste component removal ; waste water management ; water flow
英文摘要: In biological wastewater treatment, the bacteria starvation always challenges the stability of system operation. Yet, the effects of starvation and possibility of reactivation are less understood for anaerobic sulfidogenic system. Sulfidogenic systems use sulfate as electron acceptor for organic chemical oxygen demand (COD) degradation, so it will encounter two kind of starvations: (i) complete stoppage of wastewater flow (named complete food starvation) and (ii) remaining organic COD but with very low level sulfate in the influent (named sulfate starvation). In this study, the relative long-term starvation (over 30-day) and subsequent reactivation were studied in two lab-scale continuous gas recirculation sulfate-reducing upflow sludge bed (CGR-SRUSB) reactors. It was observed that the complete food starvation and sulfate starvation decreased the COD removal rate (in the similar range of 60–65%) and the specific sulfidogenic activity (about 45% and 61% respectively), as well as increasing the sludge flotation potential (SFP) from <15% to 58% and 35% respectively. Moreover, the following restoration experiments proved that the perturbed systems could be reactivated within 10–15 days for both cases. The results of investigating the mechanisms showed the performance deterioration were highly attributed to the starvation-induced granular sludge transitions, with respect to the changing of sludge physico-chemical properties (permeability, porosity, hydrophobicity and viscocity) and microbial stuctures (sulfate-reducting bacteria and extracellular polymeric substances). The outcomes of this study can provide useful information for dealing with the prolonged starvation problems in sulfidogenesis-based systems in industrial and municipal wastewater treatment. © 2018 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122068
Appears in Collections:气候变化事实与影响

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作者单位: Department of Civil and Environmental Engineering, Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution (Hong Kong Branch), Water Technology Center, The Hong Kong University of Science and Technology, Hong Kong; Wastewater Treatment Laboratory, FYT Graduate School, Shenzhen Institute, The Hong Kong University of Science and TechnologyGuangdong, Hong Kong; Water Research Group, Department of Civil Engineering, University of Cape Town, Cape Town, South Africa; Sino-Dutch R&D Centre for Future Wastewater Treatment Technologies/Key Laboratory of Urban Stormwater System and Water Environment, Beijing University of Civil Engineering & Architecture, Beijing, 100044, China

Recommended Citation:
Wang B.,Wu D.,Dai J.,et al. Elucidating the effects of starvation and reactivation on anaerobic sulfidogenic granular sludge: Reactor performance and granular sludge transformation[J]. Water Research,2019-01-01
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