Session 7 - Wastewater treatment

[CEST2019_00539] Characterization of activated carbon prepared from Aegina pistachio shells for Hg removal
by Karagianni E., Chatzitheodoridis E., Papassiopi N.

Preparation of activated carbon from agricultural bio-products is a promising way to produce useful adsorbents for Hg removal. In this study Aegina pistachio shells were used as raw materials and the activation was carried out by impregnation with ZnCl2 and heating at 750oC under N2 atmosphere. Three different levels of impregnation ratios (IR) were used for the chemical activation procedure, i.e. IR 1.0, 1.5 and 2.0 grams of ZnCl2 per gram of raw material.

Session: 7, Room: A, at Thu, 09/05/2019 - 12:15 to 12:30
Oral presentation in Wastewater treatment
[CEST2019_00483] Unbiodegradable soluble COD removal from industrial wastewater by a hybrid moving bed biofilm reactor
by Carucci A., Cappai G., Camedda C., Erby G., Puggioni G., Milia S.,Tocco G.

In this study, plastics industry wastewater (PIWW) characterized by high total and soluble chemical oxygen demand (tCOD and sCOD, up to ~2200 and ~1500 mg/L, respectively) and remarkable unbiodegradable soluble COD (usCOD, 508±224 mg/L, 31±14% of tCOD) concentrations was treated at laboratory scale using a hybrid moving bed biofilm reactor (MBBR). Interestingly, the MBBR showed average tCOD, sCOD and usCOD removal efficiencies of 26±6, 32±11 and 36±11%, respectively, which were comparable to those achieved by the coagulation/flocculation pre-treatment currently applied at full-scale.

Session: 7, Room: A, at Thu, 09/05/2019 - 12:00 to 12:15
Oral presentation in Wastewater treatment
[CEST2019_00337] Aerobic degradation of tetramethyl ammonium hydroxide (TMAH) from effluents of semiconductor industries: kinetic studies of laboratory and pilot experiments
by Innocenzi V., De Michelis I., Ippoiıto N.M., Mazziotti Di Celso G., Prisciandaro M., Veglio F.

Aerobic degradation of effluents contains tetramethylammonium hydroxide molecules (TMAH), coming from an electronic industry, was studied at laboratory and pilot scale. At the first, the preliminary experiments were conducted using a lab scale reactor inoculated with activated sludge coming from urban wastewater treatment. Several batches have been performed on real effluent, in which TMAH concentration was about 1800 mg/L. The results showed that after acclimation, the microorganisms removed 99% of TMAH in seven days.

Session: 7, Room: A, at Thu, 09/05/2019 - 11:30 to 11:45
Oral presentation in Wastewater treatment
[CEST2019_00356] Tuning of an advanced control system on a membrane process for tannery wastewater purification and chromium recovery purposes
by Marchetti A., Stoller M.

Tannery wastewater represent a hazard to the environment due to its high content of chromium. Conventional methods to purify this wastewater stream are available, but not capable to recover back chromium to the tannery process. Membranes appears to be a promising technology to achieve both targets of water purification and recycling of chromium.

Session: 7, Room: A, at Thu, 09/05/2019 - 11:45 to 12:00
Oral presentation in Wastewater treatment
[CEST2019_00245] Impregnated Resins as Novel Sorbents for Removal of Toxic Metal Ions from Aqueous Solutions
by Zawierucha I., Nowik-Zajac A.,Kozlowski C.

In this study the performance of impregnated resin was evaluated as the sorbent for the removal of lead ions from aqueous solutions. It was observed that the lead removal efficiency depends on the sorbent dose, initial concentration of metal ions, pH of water and the contact time. The results of batch experiments showed the highest removal efficiency of Pb(II) ions from water (>99%) at L:S = 100:1 for the following conditions: initial concentration of metal ions of 10 mg/dm3, pH = 6, and contact time of 60 min. The experimental equilibrium data were also described by sorption isotherms.

Session: 7, Room: A, at Thu, 09/05/2019 - 12:33 to 12:36
Flash presentation in Wastewater treatment
[CEST2019_00254] Removal of Toxic Metal Ions Through Polymer Inclusion Membranes Containing Macrocyclic Ligands as Carriers
by Nowik-Zajac A., Zawierucha I., Kozlowski C.

More strict environmental regulations on the discharge of toxic metals require developing various technologies for their removal from polluted streams. The separation of toxic metal ions using immobilized membranes with doped ligands, due to their high selectivity and removal efficiency, increased stability, and low energy requirements, is promising for improving the environmental quality. Cellulose triacetate-based polymer inclusion membranes (PIMs), with macrocyclic ligands as ion carriers, were studied for their ability to transport of toxic metal ions from aqueous solutions.

Session: 7, Room: A, at Thu, 09/05/2019 - 12:36 to 12:39
Flash presentation in Wastewater treatment
[CEST2019_00235] Monitoring Of Treated Domestic Waste Water Quality
by Poulli K., Rossidou E., Kozakou S., Michael N., Demetriou E., Christofidou M., Aletrari M.

Cyprus is experiencing severe water supply deficiency. Particularly in summer months the situation is aggravated mainly due to low precipitation, high evaporation and increased demands for irrigation and tourisms. The use of treated wastewaters for environmental purposes such as recharging aquifers, agricultural irrigation and municipal landscape is highly contributing in the scarcity problem. In Cyprus there are 8 large urban plants and 25 small community plants for domestic waste treatment.

Session: 7, Room: A, at Thu, 09/05/2019 - 12:30 to 12:33
Flash presentation in Wastewater treatment