||Microbiological Characterization of Activated Sludge in a Wastewater Treatment Plant Chemically Modified for Phosphorous Removal.
Un, Richard F. ;
||Pennsylvania State Univ., University Park. Inst. for Research on Land and Water Resources.
||DI-14-31-0001-3238; OWRR-A-018-PA; 09654,; A-018-PA(1)
( Sewage treatment ;
Chemical removal(Sewage treatment)) ;
( Chemical removal(Sewage treatment) ;
( Microbiology ;
Activated sludge process) ;
Aluminum sulfates ;
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Combined chemical-biological wastewater treatment for simultaneous removal of organic matter and phosphorous is being attempted on a limited basis in full scale wastewater treatment plants. The study describes the first investigation involving the microbiology of a full scale combined chemical-biological wastewater treatment plant. One of the aeration basins was dosed with aluminum sulfate for the purpose of phosphorous removal. The other aeration basin (control) was operated in the conventional manner without alum addition. Results suggest the aluminum flocs formed in the chemical-biological treatment enmesh dispersed wastewater microorganisms, some of which are qualitatively unlike those indigenous to natural activated sludge.