Kinetic analysis of enhanced biological phosphorus removal in a hybrid integrated fixed film activated sludge process

Abstract

Hybrid integrated fixed film activated sludge is a promising process for the enhancement of nitrification, denitrification and phosphorus removal in conventional activated sludge systems that can be used for upgrading biological nutrient removal, particularly when they have space limitations or need modifications that will require large monetary expenses. In this research, successful implementation of hybrid integrated fixed film activated sludge process at temperate zone wastewater treatment facilities has been studied by the placement of fixed film media into aerobic, anaerobic and anoxic zones. The primary objective of this study was to investigate the incorporation of enhanced biological phosphorus removal into hybrid integrated fixed film activated sludge systems and study the interactions between the fixed biomass and the mixed liquor suspended solids with respect to substrate competition and nutrient removal efficiencies. A pilot-scale anaerobic-anoxic-oxic configuration system was used. The system was operated at different mean cell residence times and influent chemical oxygen demand/total phosphorus ratios and with split influent flows. The experimental results confirmed that enhanced biological phosphorus removal could be incorporated successfully into hybrid integrated fixed film activated sludge system, but the redistribution of biomass resulting from the integration of fixed film media and the competition of organic substrate between enhanced biological phosphorus removal and denitrification would affect performances. Also, kinetic analysis of the reactor with regarding to phosphorus removal has been studied with different kinetic models and consequently the modified Stover-Kincannon kinetic model has been chosen for modeling studies and experimental data analysis of the hybrid integrated fixed film activated sludge reactor.

Effect of sludge pretreatment on the performance of anaerobic/ anoxic/ oxic membrane bioreactor treating domestic wastewater

“…The expense for the treatment of the excess sludge has been estimated to be as much as 50-60 % of the total expense of wastewater treatment plant (Nowak, 2006;Hooshyari et al, 2009;Pasztor et al, 2009;Zhang et al, 2009). Recently various sludge disintegration techniques have attracted attentions as promising alternatives to reduce sludge production.…”

Comparing new perspective of hybrid approach and conventional kinetic modelling techniques of a submerged biofilm reactor performance

“…The biofilm structure comprises cell clusters, pores, and extracellular polymeric substances (EPS) [2]. The submerged biofilm bioreactor configuration has been extensively used for treatment of carbonaceous pollutants as well as nitrogen and phosphorus matters [3]. High sludge retention time in biofilm bioreactor can cause coexistence of nitrifier and obligate heterotrophic aerobes in the outer layers of biofilm [4].…”

Accuracy assessment of moderate resolution image spectroradiometer products for dust storms in semiarid environment

“…Deposit of SPM is another environmental effect especially when SPM is deposited onto soil. When a high amount of SPM is deposited, due to their chemical composition, they may influence nutrient balance and acidity of soil (Herut et al, 2001;Yun et al, 2002;Odabasi et al, 2002;Hooshyari et al, 2009). The high amount of SPM in the air is a major problem in most parts of Asia.…”