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Nickel sorption by acclimatized activated sludge culture
Date
2003-08-01
Author
Arican, B
Yetiş, Ülkü
Metadata
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The sorption of Ni2+ by acclimatized activated sludge treating Ni2+ bearing wastewater was investigated using a once-through completely mixed tank reactor. The culture developed from sewage was acclimatized to 85.2 mumole/L Ni2+ influent concentration by stepwise increases, at a low dilution rate 0.11/h. Acclimation was found to enhance the sorptive capacity of the activated sludge. In fact, at all of the intermediate concentrations, percentage Ni2+ adsorbed by the biomass and also the sorptive capacity of the activated sludge drastically increased with an increase in the influent Ni2+ concentration. All influent Ni2+ concentrations were found to significantly stimulate the observed biomass yield of the culture over that observed in the base line. Experimental findings obtained at two other dilution rates; namely, 0.25/h and 0.45/h revealed that dilution rate is a significant operational parameter affecting the Ni2+ sorption characteristics of acclimatized activated sludge microorganisms. Considerable complexation of nickel and organic and inorganic ligands in the wastewater appeared to be responsible for a relatively lower Ni2+ sorption capacity.
Subject Keywords
Ecological Modelling
,
Waste Management and Disposal
,
Pollution
,
Water Science and Technology
URI
https://hdl.handle.net/11511/48148
Journal
WATER RESEARCH
DOI
https://doi.org/10.1016/s0043-1354(03)00209-4
Collections
Department of Environmental Engineering, Article
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B. Arican and Ü. Yetiş, “Nickel sorption by acclimatized activated sludge culture,”
WATER RESEARCH
, pp. 3508–3516, 2003, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/48148.