In this study, the concentration of TP in the influent was much lower compared to other reports, which is the reason for the low removal rate.
Significant lag-times can be achieved for very low removal rates d R. The time to switch between N1 and N2 metabolism also depends on the rate k ub with which the repressor and P2 dissociate.
In general, the slope of the concentration-discharge curve for PE samples is more positive for compounds with high removal efficiencies (including CAF, CAND, COP, SIT, CHO) than for compounds with low removal efficiencies (BEP, GAL, BPA, TBEP).
In the literature, various removal rates are described for the biological removal of both ibuprofen and diclofenac; for example, diclofenac showed low removal rates (21.8 ± 28.5%) in a pilot-scale membrane bioreactor, whereas ibuprofen showed a removal of 99.1 ± 1.8% [ 14].
As for Cd2+ and Zn2+, low removal percentage was achieved by S limestone sample, but Z sample, considered as pure limestone samples, was not able to remove measurable amounts of Cd2+ and Zn2+.
Flocculation tests using iron salts as well as aluminium salts as coagulants showed very low removal rates for the amines.
The low removal efficiency for the ketones by CR20L shows that both physisorption (cf AC) and chemisorption mechanisms are poor for ketones using this adsorbent.
In terms of the organic pollutants, under the conditions conducted the electrokinetic-flushing treatment, low removal efficiency for phenanthrene (29%) and pyrene (19%) was achieved.
This review compares MBR and conventional activated sludge (CAS) for wastewater treatment and discusses problems arising from the presence of emerging micropollutants, such as the low removal efficiency for certain types of compounds.
MnO2 catalysts are important for low-temperature removal of air pollutants.
