Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4909944 | Journal of Water Process Engineering | 2016 | 9 Pages |
Abstract
Recently, some studies in the field of enhanced biological phosphorus removal (EBPR) have reported that anaerobic zone is not mandatory and EBPR could be accomplished under fully aerobic conditions. This study investigated the EBPR performance of a bacterial consortium in a fully aerobic continuous stirred tank reactor (CSTR) fed with synthetic wastewater containing molasses as the sole carbon source. Total phosphorus (TP) concentration in the feed was varied between 1.4 and 40Â mg/L. The results showed that TP removal efficiency was over 90% up to 20Â mg/L of influent TP concentration but decreased to 62% and 30% at 30 and 40Â mg/L of influent TP concentrations, respectively. TP removal efficiency was affected more by its own concentration in the influent. COD and NH4+-N removal efficiencies largely remained unaffected by different TP concentrations. Further investigations showed that TP was transformed to intracellular storage of polyphosphate (poly-P) with single stage aerobic process. The primarily reason for TP removal was the synergistic activity among the individual strains of phosphate solubilizing and accumulating microbes. Based on tracer studies, dead space in CSTR was found to range from 1.5-2.5%. The flow pattern in the CSTR was classified as completely mixed.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Dharmender Yadav, Vikas Pruthi, Pramod Kumar,