Removal of micropollutants through a advanced biological wastewater treatment plant in a pilot-scale membrane plant (Uf, nf, ro) using

In this study, the levels and removal of micropollutants (MP) from raw wastewater and treated wastewater of advanced biological wastewater treatment plant (WWTP) with 200.000 m3/day capacity were investigated. In addition, MP levels and removals were investigated at the unit outputs of the pilot scale membrane plant consisting of ultrafiltration (UF), nanofiltration (NF) and reverse osmosis (RO) processes with 90 m3/day capacity fed with treated wastewater of the same WWTP. Phthalate ester group (BBP, DEHP, DnOP), PAH group (Benzo[b]fluoranthene, Benzo[k]fluoranthene, Benzo(a)pyrene, Indeno[1,2,3-cd]pyrene Benzo[g,h,i]perylene, fluoranthene, anthracene, naphthalene) and heavy metals (Cd, Pb, Hg, Ni) were monitored for 1 year. After extraction of FE and PAH samples, GC-MS and heavy metals were analyzed by ICP-MS. The highest MK concentrations in the crude wastewater were Nickel (19313 ng/L) from the heavy metal group and DEHP (9817.8 ng/L) from the FE group, while Benzo[k]fluoranthene (14.4 ng/L) and Benzo[g h,i] perylene (20.8 ng / L) from the PAH group was the lowest. For the FE group, the biological treatment process for BBP, DnOP and DEHP respectively was 19%, 44% and 82%, respectively. Physicochemical properties of PAHs affect the removal efficiencies of WWTPs. The removal efficiency of heavy metals by biological treatment was calculated as <55%. UF processes were found to be ineffective in MP removal with low removal efficiencies, the removal efficiency between NF and RO was similar in MP removal, so NF with lower initial investment and operating costs could be preferred.