DOI: 10.1016/j.watres.2018.10.086
Scopus记录号: 2-s2.0-85055900661
论文题名: Comparison between kinetics of autochthonous marine bacteria in activated sludge and granular sludge systems at different salinity and SRTs
作者: Corsino S.F. ; Capodici M. ; Di Pippo F. ; Tandoi V. ; Torregrossa M.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 425
结束页码: 437
语种: 英语
英文关键词: Activated sludge
; Aerobic granular sludge
; Autochthonous-halophilic bacteria
; Saline wastewater
; Shortcut nitrification
Scopus关键词: Activated sludge process
; Biomass
; Denitrification
; Granular materials
; Granulation
; Nitrification
; Nitrogen removal
; Nutrients
; Organic carbon
; Wastewater treatment
; Activated sludge
; Aerobic granular sludges
; Halophilic bacteria
; Saline wastewater
; Shortcut nitrification
; Aerobic bacteria
; ammonia
; carbon
; nitrite
; nitrogen
; organic carbon
; sodium chloride
; activated sludge
; ammonium compound
; bacterium
; biomass
; comparative advantage
; comparative study
; denitrification
; marine environment
; microbial activity
; nitrification
; organic carbon
; pollutant removal
; reaction kinetics
; salinity
; wastewater
; wastewater treatment
; activated sludge
; Article
; bacterial cell
; bound fraction
; carbon source
; chemical oxygen demand
; comparative study
; Cryomorphaceae
; denitrifying bacterium
; high throughput sequencing
; kinetics
; marine bacterium
; microbial biomass
; microbial community
; microbial diversity
; nitrifying bacterium
; nonhuman
; oxygen concentration
; oxygen diffusion
; priority journal
; Rhodobacteraceae
; salinity
; solids retention time
; species richness
; Cryomorphaceae
; Rhodobacteraceae
英文摘要: Biological nutrient removal performances and kinetics of autochthonous marine biomass in forms of activated sludge and aerobic granular sludge were investigated under different salinity and sludge retention time (SRT). Both the biomasses, cultivated from a fish-canning wastewater, were subjected to stepwise increases in salinity (+2 gNaCl L−1), from 30 gNaCl L−1 up to 50 gNaCl L−1 with the aim to evaluate the maximum potential in withstanding salinity by the autochthonous marine biomass. Microbial marine species belonging to the genus of Cryomorphaceae and of Rhodobacteraceae were found dominant in both the systems at the maximum salinity tested (50 gNaCl L−1). The organic carbon was removed with a yield of approximately 98%, irrespective of the salinity. Similarly, nitrogen removal occurred via nitritation-denitritation and was not affected by salinity. The ammonium utilization rate and the nitrite utilization rate were approximately of 3.60 mgNH4-N gVSS−1h−1 and 10.0 mgNO2-N gVSS−1h−1, respectively, indicating a high activity of nitrifying and denitrifying bacteria. The granulation process did not provide significant improvements in the nutrients removal process likely due to the stepwise salinity increase strategy. Biomass activity and performances resulted affected by long SRT (27 days) due to salt accumulation within the activated sludge flocs and granules. In contrast, a lower SRT (14 days) favoured the discharge of the granules and flocs with higher inert content, thereby enhancing the biomass renewing. The obtained results demonstrated that the use of autochthonous-halophilic bacteria represents a valuable solution for the treatment of high-strength carbon and nitrogen saline wastewater in a wide range of salinity. Besides, the stepwise increase in salinity and the operation at low SRT enabled high metabolic activity and to avoid excessive accumulation of salt within the biomass aggregates, limiting their physical destructuration due to the increase in loosely-bound exopolymers. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122202
Appears in Collections: 气候变化事实与影响
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作者单位: Dipartimento di Ingegneria Civile, Ambientale, Aerospaziale, dei Materiali, Università di Palermo, Viale delle Scienze Ed. 8, Palermo, 90128, Italy; IRSA-CNR Water Research Institute, National Research Council, Via Salaria km 29.300, Monterotondo, Rome, CP10 00015, Italy
Recommended Citation:
Corsino S.F.,Capodici M.,Di Pippo F.,et al. Comparison between kinetics of autochthonous marine bacteria in activated sludge and granular sludge systems at different salinity and SRTs[J]. Water Research,2019-01-01