Please use this identifier to cite or link to this item: https://ir.swu.ac.th/jspui/handle/123456789/13042
ชื่อเรื่อง: Toxic compounds biodegradation and toxicity of high strength wastewater treated under elevated nitrogen concentration in the activated sludge and membrane bioreactor systems
ผู้แต่ง: Boonnorat J.
Boonapatcharoen N.
Prachanurak P.
Honda R.
Phanwilai S.
Keywords: Activated sludge process
Bacteria
Biodegradation
Bioreactors
Efficiency
Effluents
Nitrification
Nitrogen
Nitrogen removal
Toxicity
Activated sludge
C/N ratio
High strength wastewater
Membrane bio reactor (MBR)
Membrane bioreactor system
Membrane bioreactor technology
Nitrogen concentrations
Toxic compounds
Wastewater treatment
4,4' isopropylidenediphenol
carbamazepine
carbon
di (ethylhexyl) phthalate
diclofenac
diethyltoluamide
nitrogen
phthalic acid
phthalic acid dibutyl ester
unclassified drug
nitrogen
activated sludge
biodegradation
bioreactor
concentration (composition)
membrane
nitrogen
toxic material
toxicity
wastewater treatment
activated sludge
adsorption
Agrobacterium
aquatic environment
Article
Bacillus
bacterial growth
biodegradation
Burkholderia
environmental impact assessment
fish
hydrophilicity
hydrophobicity
membrane reactor
microbial community
nitrifying bacterium
nonhuman
Oreochromis niloticus
population abundance
Pseudomonas
Rhodopseudomonas
species diversity
Sphingomonas
toxicity testing
waste component removal
waste water management
water pollution
animal
artificial membrane
bioreactor
chemistry
microbiology
sewage
toxicity
waste water
Bacteria (microorganisms)
Animals
Bioreactors
Carbon
Fishes
Membranes, Artificial
Nitrogen
Sewage
Toxicity Tests
Waste Disposal, Fluid
Waste Water
วันที่เผยแพร่: 2017
บทคัดย่อ: This research has assessed the removal efficiencies of toxic compounds in the high strength wastewater (the leachate and agriculture wastewater mixture) using the activated sludge (AS) and membrane bioreactor (MBR) technologies under two carbon to nitrogen (C/N) ratios (C/N 14 and 6) and two toxic compounds concentrations (8–396 μg/L and 1000 μg/L). In addition, the toxicity evaluations of the AS and MBR effluents to the aquatic environment were undertaken at five effluent dilution ratios (10, 20, 30, 50 and 70% v/v). The findings indicate that the AS treatment performance could be enhanced by the elevation of the nitrogen concentration. Specifically, the C/N 6 environment helps promote the bacterial growth, particularly heterotrophic nitrifying bacteria (HNB) and nitrifying bacteria (NB), which produce the enzymes crucial to the toxic compounds degradation. The improved biodegradation makes the effluents less toxic to the aquatic environment, as evidenced by the lower mortality rates of both experimental fish species raised in the nitrogen-elevated diluted AS effluents. On the other hand, the elevated nitrogen concentration minimally enhances the MBR treatment performance, given the fact that the MBR technology is in itself a biological treatment scheme with very high compounds removal capability. Despite its lower toxic compounds removal efficiency, the AS technology is simple, inexpensive and operationally-friendly, rendering the system more applicable to the treatment operation constrained by the financial, manpower and technological considerations. © 2017 Elsevier B.V.
URI: https://ir.swu.ac.th/jspui/handle/123456789/13042
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85015699429&doi=10.1016%2fj.scitotenv.2017.03.078&partnerID=40&md5=ba289363ebf03f53fda43c3944a2ff4e
ISSN: 489697
Appears in Collections:Scopus 1983-2021

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