Publication:
Toxic compounds biodegradation and toxicity of high strength wastewater treated under elevated nitrogen concentration in the activated sludge and membrane bioreactor systems

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Issued Date

2017

Resource Type

Article

File Type

application/pdf

ISSN

489697

DOI

10.1016/j.scitotenv.2017.03.078

Other identifier(s)

2-s2.0-85015699429

Rights Holder(s)

มหาวิทยาลัยศรีนครินทรวิโรฒ

Bibliographic Citation

Science of the Total Environment. Vol 592, (2017), p.252-261

Suggested Citation

Boonnorat J., Boonapatcharoen N., Prachanurak P., Honda R., Phanwilai S. Toxic compounds biodegradation and toxicity of high strength wastewater treated under elevated nitrogen concentration in the activated sludge and membrane bioreactor systems. Science of the Total Environment. Vol 592, (2017), p.252-261. doi:10.1016/j.scitotenv.2017.03.078 Retrieved from: https://hdl.handle.net/20.500.14740/4098

Title

Toxic compounds biodegradation and toxicity of high strength wastewater treated under elevated nitrogen concentration in the activated sludge and membrane bioreactor systems

Author(s)

Boonnorat J.
 Boonapatcharoen N.
 Prachanurak P.
 Honda R.
 Phanwilai S.

Abstract

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.

Subject(s)

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

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URI

https://hdl.handle.net/20.500.14740/4098

Collections

Scopus: Year 1983-2021

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