Baffled duckweed pond system for treatment of agricultural drainage water containing pharmaceuticals.
The aim of the study is to assess the efficiency of a novel bioremediation system namely baffled duckweed pond (BDWP) system for the treatment of agricultural drainage water containing pharmaceuticals at different hydraulic retention times (HRTs). The removal efficiencies of acetaminophen (ACT), amoxicillin (AMX), and ampicillin (AMP) increased from 69.3 ± 8.6 to 87.3 ± 3.5%, from 52.9 ± 9.4 to 82.9 ± 5.2%, and from 55.3 ± 7.9 to 90.6 ± 2.8% at increasing the HRT from 6 to 8 days, respectively. However, ACT, AMX, and AMP removal efficiencies were slightly improved at increasing the HRT from 8 to 12 days. Diclofenac (DFC) removal efficiencies amounted to 56.6 ± 11.6, 55.7 ± 11.9, and 28.3 ± 12.9% at an HRTs of 12, 8, and 6 days, respectively. The results showed no relationship between the uptake/absorption of pharmaceuticals fractions and BOD5/chemical oxygen demand (COD) ratio except ACT where R2was 0.84. The effect of COD/N ratio on the removal efficiency of pharmaceuticals fractions was slight. Additional removal of pharmaceuticals fractions and nitrification occurred in carrier sponge media situated in the last compartment of the BDWP.
a Department of Environmental Engineering , Egypt-Japan University of Science and Technology (E-Just) , Alexandria , Egypt.
Doaa
D
Bassuney
a Department of Environmental Engineering , Egypt-Japan University of Science and Technology (E-Just) , Alexandria , Egypt.|b National Research Centre , Water Pollution Research Department , Giza , Egypt.
Ahmed
A
Tawfik
D001673:Biodegradation, Environmental; D019149:Bioreactors; D004364:Pharmaceutical Preparations; D061005:Ponds; D014865:Waste Disposal, Fluid; D014867:Water; D018508:Water Purification
D004364:Pharmaceutical Preparations; D014867:Water
HRT; agricultural drainage water; baffled duckweed pond system; carrier sponge; pharmaceuticals