Microbial population structures in activated sludge before and after the application of synthetic polymer
Journal Title: International Journal of Environmental Science and Technology - Year 2007, Vol 4, Issue 1
Abstract
Since Juang (2005) has found that the sludge settleability became much worse and the flocs displayed as pin flocs in only a few days after the addition of synthetic polymer was halted, it is hypothesized that the shift of microbial population in activated sludge before and after the addition of synthetic polymer might have occurred. Therefore, the identification of microbial population in the activated sludge of a lab-scaled continuous-flow type of treatment reactor was conducted at different phases of this study. The results of this study showed that the presence of synthetic polymer inhibited the growth of dominant bacteria and floc-formers in activated sludge, but gave a competitive advantage of growth to some other bacteria. The addition of synthetic polymer has caused the shift of microbial population and affected the growth of floc-formers in activated sludge. It took more than one month for the population structure of predominant microorganisms in activated sludge to return more closely to the initial population structure.
Authors and Affiliations
D. F. Juang, L. J. Chiou
Keywords
Related Articles
- EP ID EP133993
- DOI -
- Views 109
- Downloads 0
Alteration of macroinvertebrate community in tropical aquatic systems in relation to sediment redox potential and overlaying water quality
Limnological studies in two tropical Indian aquatic habitats showed that macroinvertebrate communities have greater diversity than other biotic communities present there. Sediment redox potential is found to be an import...
Genotypic and environmental interaction in advanced lines of rice under salt-affected soils of Punjab
Sixteen genotypes developed through hybridization and mutation breeding techniques were evaluated during the year 2003-04 on nine locations covering most of the area of Punjab province including Faisalabad, Toba Tek Sing...
Influence of dissolved oxygen concentration and aeration time on nitrite accumulation in partial nitrification process<br />
This study investigated the influence of dissolved oxygen concentration and aeration time on nitrification and nitrite accumulation in an attempt to optimize the recently developed biological-partial-nitritation process...
Effect of exo-polysaccharides producing bacterial inoculation on growth of roots of wheat (Triticum aestivum L.) plants grown in a salt-affected soil
Effect of soil salinity on physico-chemical and biological properties renders the salt-affected soils unsuitable for soil microbial processes and growth of the crop plants. Soil aggregation around roots of the plants is...
Bioaccumulation of Cu, Zn and Ni from the wastewater by treated Nasturtium officinale
Aquatic plants are well known in accumulating and in concentrating heavy metals. In this study, several physiological responses of aquatic vascular plant, Nasturtium officinale (watercress), which were elevated concentra...