Publication:
An integrated system for the bioremediation of wastewater containing xenobiotics and toxic metals

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Issued Date

2004

Resource Type

Article

File Type

application/pdf

ISSN

16180240

DOI

10.1002/elsc.200420041

Other identifier(s)

2-s2.0-4444331176

Rights Holder(s)

มหาวิทยาลัยศรีนครินทรวิโรฒ

Bibliographic Citation

Engineering in Life Sciences. Vol 4, No.4 (2004), p.354-357

Suggested Citation

Chuichulcherm S. An integrated system for the bioremediation of wastewater containing xenobiotics and toxic metals. Engineering in Life Sciences. Vol 4, No.4 (2004), p.354-357. doi:10.1002/elsc.200420041 Retrieved from: https://hdl.handle.net/20.500.14740/6396

Title

An integrated system for the bioremediation of wastewater containing xenobiotics and toxic metals

Author(s)

Chuichulcherm S.

Abstract

An integrated system for the biotreatment of acidic wastewaters containing both toxic metals and organics is presented. It consists of two bioprocess stages (i) an anaerobic, SRB stage (containing alkaline-tolerant sulfate-reducing bacteria) that at pH 8 (chosen to acclimatize the bacteria in the biomedium) produces high concentrations of total sulfide ions (more than 400 mg/L) which are added to the wastewater to precipitate the heavy metals out at pH 2 as metal sulfides, and (ii) an aerobic, acidophilic stage containing heterotrophic bacteria (WJB3) that degrade organic xenobiotics. The anaerobic system was comprised of a 4-L fluidized bed bioreactor with immobilized SRB, a mixing tank, and a precipitation tank. The effluent from the bioreactor with a high concentration of sulfide ions was fed into a mixing tank where model wastewaters containing toxic metals and phenol at pH 2 were also fed at increasing loading rates until free metal ions could be detected in the precipitation tank outlet. Then the effluent from the precipitation tank outlet was fed into a 2.5-L aerobic bioreactor in which phenol was degraded. In this research, 100% removal efficiencies were obtained with wastewaters containing more than 400 mg/L metal ions and 900 mg/L phenol at a 6-h HRT of the mixing tank. © 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Subject(s)

Heavy metal
 Metal ion
 Organic compound
 Phenol derivative
 Sulfide
 Xenobiotic agent
 Aerobic process
 Anaerobic process
 Biological treatment
 Bioremediation
 Pollutant removal
 Sulfate-reducing bacterium
 Toxic material
 Wastewater treatment
 Acclimatization
 Acidity
 Aerobic bacterium
 Alkalinity
 Article
 Bioreactor
 Bioremediation
 Chemical composition
 Chemical model
 Concentration (parameters)
 Controlled study
 Culture medium
 Effluent
 Fluidized bed reactor
 Immobilization
 Microbial degradation
 Nonhuman
 PH measurement
 Precipitation
 Research
 Sulfate reducing bacterium
 Tank
 Waste water management

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URI

https://hdl.handle.net/20.500.14740/6396

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Scopus: Year 1983-2021

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