Removal of bis (2-ethylhexyl) phthalate from reject water in a nitrogen-removing sequencing batch reactor

Journal of Environmental Management
Sanna K MarttinenJukka A Rintala

Abstract

Reject water from sewage sludge processing may contain high concentrations of nutrients and organic pollutants and cause internal pollution load at a sewage treatment plant (STP) if circulated to the headworks of an STP. In the present study removal of nitrogen and bis (2-ethylhexyl) phthalate (DEHP) from reject water was studied in two sequencing batch reactors (SBRs) with different aerobic/anoxic periods during a 6-h total cycle period. Ammonia-nitrogen (NH(4)-N) was almost totally removed in both reactors, apparently by nitrification throughout the run, while denitrification declined with decreasing SCOD in the influent resulting in an increase in the effluent nitrate-nitrogen (NO(3)-N) concentration. DEHP removals from the water phases were above 95% in both reactors, while the average total removals were 36 and 42%, calculated on a mass basis. Much higher removals occurred in the experiment where one of the systems was spiked with a given amount of DEHP. The spiking experiment suggested that SBRs had the potential to remove DEHP biologically from reject water but that the removal was restricted by the poor bioavailability of DEHP as a result of sorption to solids. This study showed that SBR has the potential to cut the int...Continue Reading

References

Feb 25, 2003·Water Research·Sanna K MarttinenJukka A Rintala
Nov 1, 1995·Environmental Science & Technology·M Alexander

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Citations

Jul 2, 2008·Applied Microbiology and Biotechnology·Da-Wei LiangJianzhong He
Jul 17, 2012·Journal of Environmental Management·Mahmoud M Abdel daiemManuel Sánchez-Polo
Sep 20, 2016·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Gita SainiA A Kazmi
Feb 11, 2011·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Eduardo R LovatelIrajá N Filho

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