Water and wastewater reuse-POSTER SESSION

[CEST2019_00967] Adsorptive Removal of Marbofloxacin from Milk using Activated Carbons
by Ge X.Y., Wu Z.L.,Kunz W., Alessandro B., Carvotto G.

The present study aims to remove the residual marbofloxacin (MBX) from milk with activated carbons (ACs) in batch and flow systems to meet the maximum residue limits (MRLs, 0.075 µg mL-1). Different types (granular and powder) and amounts of ACs were studied. In batch mode, 50 mg of commercial granular AC (CGAC) with 1083 m2 g-1 of BET specific surface area exhibited the superior adsorption performance for 20 mL of 1 µg mL-1 MBX-spiked milk. 93.7% of removal efficiency (RE) and 0.063 µg mL-1 of MBX residue were achieved. In flow mode, 325 mL of 1 µg mL-1 MBX-spiked milk was efficiently purified through 500 mg CGAC in a glass column (1 cm ID) and 93.4% of RE and 0.066 µg mL-1 of MBX residue were attained at the end. The flow process can handle 1.6 times higher in volume than that in batch mode. In conclusion, antibiotics can be efficiently, economically and conveniently removed using ACs adsorption from milk, despite the presence of competition adsorption of impurities. The adsorption with flow mode paves the way for the removal of antibiotics in milk.

Saturday
Poster presentation in Water and wastewater reuse-POSTER SESSION
[CEST2019_00969] Design optimization of a polymeric nanofiltration membrane for olive mill wastewater valorization plus purification
by Ochando-Pulido J.M., Stoller M., Martínez-Férez A.

The core of this work was to model and optimize an environmentally friendly nanofiltration (NF) treatment process for two-phase olive mill wastewater (OMW) valorization throughout concentration and recovery of its phenolic fraction and the obtention of a purified permeate stream. A statistical multifactorial analysis was performed to quantify the potential complex conjugated effects of the input parameters. Quality standards to reuse the purified stream in irrigation or in-site discharge were checked. To the author’s knowledge, no previous work on the optimization and statistical modelling of membrane processes for OMW purification and valorization can be found up to the present. The optimized data are very relevant for the feasible scale-up of the proposed process, since the NF membrane was highly efficient at ambient temperature conditions and raw effluent pH. A permeate stream that could be reused for irrigation and a retantate stream concentrated in phenols (1315.7 mg/L) was provided.

Saturday
Poster presentation in Water and wastewater reuse-POSTER SESSION