Biomass Deflocculation And Process Disturbances Exerted By Phenol Induced Transient Load Conditions

Turbidity and relatively high concentrations of polysaccharides (biopolymers), indicating deflocculation of suspended biomass, could be observed as a result of phenol supplied in transient load conditions. The importance of preliminary acclimation could be observed in terms of the phenol removal rat...

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Bibliographic Details
Published in:Water science and technology 1998-01, Vol.38 (8-9), p.105-112
Main Authors: Galil, N.I., Schwartz-Mittelman, A., Saroussi-Zohar, O.
Format: Article
Language:English
Subjects:
Acclimatization
Biodegradation
Biological and medical sciences
Biological treatment of waters
Biomass
Biopolymers
Biotechnology
Controlled release
Deflocculating
Deflocculation
Disturbances
Environment and pollution
Fundamental and applied biological sciences. Psychology
Industrial applications and implications. Economical aspects
Load
Oxygen uptake
phenol
Phenols
Polysaccharides
Reactors
Saccharides
suspended biomass
transient load
Turbidity
Wastewater treatment
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Summary:Turbidity and relatively high concentrations of polysaccharides (biopolymers), indicating deflocculation of suspended biomass, could be observed as a result of phenol supplied in transient load conditions. The importance of preliminary acclimation could be observed in terms of the phenol removal rates at relatively low transient loading of phenol, up to 500 mg/l. As shock intensity increased to 1,000 and 1,500 mg/l, the acclimated reactors did not show relevant differences when compared to either partially acclimated or onacclimated reactors. Transient load conditions created by phenol caused immediate reduction of the oxygen uptake rates and affected biomass respiration. Preliminary acclimation of the biomass indicated possible improvements of these influences, especially for phenol loads of up to 500 mg/l. The period following the application of phenol transient load was characterized by symptoms which could indicate that sorptiondesorption mechanisms are involved by biomass, in addition to biodegradation. Preliminary collection and temporary storage of concentrated phenolic wastewater streams followed by gradually controlled release to the treatment facilities would provide reasonable solutions for avoiding biomass deflocculation and process disturbances caused by transient load conditions.
ISSN:0273-1223
1996-9732
DOI:10.1016/S0273-1223(98)00683-0