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Modified extended aeration process for removal and recovery of cadmium from wastewaters
Author(s) -
Lowe William L.,
Gaudy Anthony F.
Publication year - 1989
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/bit.260340504
Subject(s) - sorption , aeration , activated sludge , biomass (ecology) , cadmium , population , acclimatization , heavy metals , organic matter , chemistry , reuse , metal , environmental chemistry , environmental science , pulp and paper industry , waste management , environmental engineering , sewage treatment , ecology , biology , adsorption , organic chemistry , demography , sociology , engineering
It has been reported in the literature that several microbial species have a considerable sorption capacity for heavy metals. Work herein reported, accomplished using a heterogeneous microbial population developed in a modified extended aeration activated sludge process, indicates sorption capabilities as good as, or better than, those for individual microbial species. The process herein described may have several advantages over pure or controlled culture processes and it offers the possibility for reuse of organic matter needed to regenerate metal‐sorbing biomass, as well as autodigestion of excess biomass. The work also indicates that acclimation to high levels of a specific heavy metal (Cd) does not confer acclimation to another heavy metal (Cu).