Water treatment

[CEST2019_00952] “LafargeHolcim's Greece (Heracles Group) journey to a Water Secure Future
by Rosario-Chan M., Koumenides C.

Water is considered a precious resource globally. It is not only a source of life, but is also essential in most manufacturing processes. The demand for water is growing and the competition for its use is intensifying. Water will require more management attention in the future as it is already considered a sustainability challenge. Although the construction material industry is not a large consumer of water compared to other industries, water is an essential resource in cement operations.

Session: 43, Room: A, at Sat, 09/07/2019 - 11:45 to 12:00
Oral presentation in Water treatment
[CEST2019_00963] Adsorption isotherm study of copper removal from aqueous solutions onto agricultural by-product.
by Kapsalaki K., Psychogiou M., Mitrogiannis D., Sgoubopoulou A.

Pollution by heavy metals is a serious global problem, both for the environment and for any form of life. There is a growing interest to find low cost agricultural by-products with high adsorption capacity for the removal of heavy metals. In the present study the adsorptive capacity of chemically modified rice husk was evaluated for the removal of copper ions from aqueous solutions. Equilibrium isothermal experiments were conducted and five mathematical models were used to investigate the adsorption isotherm.

Session: 43, Room: A, at Sat, 09/07/2019 - 12:00 to 12:15
Oral presentation in Water treatment
[CEST2019_00936] Application of dissolved air flotation (DAF) and liquid ferrate on mitigation of algal organic matter (AOM) during algal blooms
by Abdullah H., Alshahri A., Fortunato L., Leiknes T.

In the Middle East, Harmful algal blooms (HABs) are considered a major contributor to membrane biofouling in Seawater Reverse Osmosis desalination plants. The presence of HABs in the raw feed water leads to the increase of membrane fouling rate, the increase of chemical consumption, leading to a temporary plant shutdown. Effective pretreatment can reduce the amount of organic foulants reaching the RO membrane and alleviate the problem of flux decline during RO operation and increasing the membrane lifetime.

Session: 31, Room: A, at Fri, 09/06/2019 - 16:30 to 16:45
Oral presentation in Water treatment
[CEST2019_00897] Application of TPMS architectures in water technology: Amazing potential for cost and energy savings and reduced environmental impacts
by Arafat H.

Additive manufacturing, also known as three-dimensional (3D) printing, is a state of the art technology that has been gaining momentum in several applications including aerospace, automotive industry and the medical field. Recently, 3D printing has also gained attention as a promising fabrication pathway for key components of membrane-based systems for desalination and water treatment as well.

Session: 31, Room: A, at Fri, 09/06/2019 - 15:00 to 15:30
Oral presentation in Water treatment
[CEST2019_00908] Bio-Based phosphate functionalized activated carbon from Indian gooseberry seed shells for the efficient Copper(II) adsorption
by Mondal S., Majumder S.

Preparation of an efficient activated carbon for the removal of metal pollutants is a challenging research today. The characteristic features of an efficient phosphate functionalized activated carbon, synthesized by following chemical activation process followed by subsequent functionalization from Indian gooseberry seed shells for the copper (II) adsorption are reported. Indian gooseberry seed shells based activated carbon showed the BET surface area of 1359 m2/g, the adsorption capacity of 44.84 mg/g at 30 °C and at a pH value of 9.52.

Session: 43, Room: A, at Sat, 09/07/2019 - 12:51 to 12:54
Flash presentation in Water treatment
[CEST2019_00840] Microbiological treatment of water by cold plasma at atmospheric pressure
by Cubas A.L.V., Machado M.M., Santos J.R., Moecke E.H.S

Ensuring the world's population access to drinking water is one of the millennium's challenges, for although our planet is made up of 70% of water, poor distribution and water quality are problems that concern world leaders, being among the objectives of development 2030 agenda set by the ONU. The proposed work aimed at the microbiological treatment of water through cold plasma technology at atmospheric pressure, the control to confirm the efficiency of the treatment was through the analysis of thermotolerant coliforms.

Session: 43, Room: A, at Sat, 09/07/2019 - 12:48 to 12:51
Flash presentation in Water treatment
[CEST2019_00809] Reduction of Halogenated Organic Compounds in Water: Comparison of Available Reduction Systems based on Cu, Pd and ZVI
by Shee A., Kopinke F.-D., Mackenzie K.

Catalysts on the basis of copper (Cu) and the reducing agent borohydride (BH4-) have been successfully used for reduction of chlorinated aliphatics with low substitution degree which are usually resistant to zero-valent iron (ZVI) and hydrodehalogenation catalysts, such as Pd. Reactivity screening towards a broad spectrum of halogenated organic compounds (HOCs) helped to reveal the possible application areas of the Cu/BH4- system in water treatment compared to Pd and ZVI.

Session: 43, Room: A, at Sat, 09/07/2019 - 11:30 to 11:45
Oral presentation in Water treatment
[CEST2019_00751] Improving mycoremediation of acetaminophen: Effect of pH, nitrogen limitation, and co-cultivation
by Esterhuizen-Londt M., Behnam Sani S., Wang L.,Pflugmacher S.

Untreated pharmaceutical pollution and their possibly more toxic metabolites, resulting from outdated traditional wastewater treatment processes, end up in aquatic environments and are hazards to the ecosystem homeostasis. Biological wastewater remediation could supplement traditional methods and overcome the dumping of these biologically active compounds in the environment. Mycoremediation is especially promising due to the unspecific nature of fungi to decompose compounds through exoenzymes and the uptake of compounds as nutrients.

Session: 43, Room: A, at Sat, 09/07/2019 - 11:15 to 11:30
Oral presentation in Water treatment
[CEST2019_00771] Mixed Nanostructures / PES / RO Membrane for Water Desalination
by Shalaby M.S., Abdallah H., Shaban A.M., Chetty R., Kumar M.

Different nanomaterials graphene, zinc nanorode and zinc nanosephere were used in membrane preparation. Polyethersulphone as a main polymer was blended with nano-soultions of these nanomaterials. This Support layer was coated by a composite coating layer formed of polyvinylacohol and titanium dioxide nanotubes to provide strength and enhance hydrophilicity of such membranes. M2 (using graphene) provides highest permeate flux 30.6 L/m2.h due to its highest hydrophilicity, but it was lowest salt rejection 48.9% at feed concentration of 5000 ppm.

Session: 43, Room: A, at Sat, 09/07/2019 - 12:30 to 12:45
Oral presentation in Water treatment
[CEST2019_00660] Highly efficient anti-fouling electro-conductive membranes fabricated by reduced Graphene Oxide-Polyaniline (rGO-PANI) laminates
by Kaekooti A., Rastgar M., Sadrzadeh M.

As an obstacle against the widespread application of membranes in larger scales, fouling via different materials could cause a severe decline in water permeation. Herein, we fabricated a novel mechanically-stable electro-conductive membrane by simple pressure-assisted laminating of reduced Graphene Oxide-Polyaniline (rGO-PANI) suspension on the commercial polyethersulfone (PES) support layers. Field emission scanning electron microscopy (FESEM) and water contact angle measurements were used to characterize rGO-PANI membranes.

Session: 43, Room: A, at Sat, 09/07/2019 - 11:00 to 11:15
Oral presentation in Water treatment
[CEST2019_00663] Thermodynamic model for a reversible desalination cycle using polyelectrolyte hydrogels
by Rud O., Košovan P.

We propose a novel desalination scheme which employs the hydrogels as a tool to draw salt ions from a brine with low salinity to a brine with high salinity. As a driving force we use the fact that the volume of polyelectrolyte gel does depend on the surrounding salinity. While the salinity defines the gel volume in open system, i.e. in equilibrium with big aqueous solution bath, in closed system (in equilibrium with small bath) salinity is defined by the gel volume.

Session: 43, Room: A, at Sat, 09/07/2019 - 12:15 to 12:30
Oral presentation in Water treatment
[CEST2019_00601] Radiation-induced degradation products of 2-methyl isoborneol and geosmin: the role of different reactive species
by Christophoridis C., Pestana C.J., Kaloudis T., Lawton L., Hiskia A.

Gamma radiolysis can serve as an effective method for the degradation of organic water pollutants, due to the production of reactive species, oxidative (OH•, OOH•, O2•-) or reductive (eaq-, H•). The application of scavengers enables the selective production of these species. Our aim was to explore the effects of the radiolytically produced reactive species, on commonly occuring water taste and odour compounds (T&O), 2-methyl isoborneol (MIB) and geosmin (GSM).

Session: 43, Room: A, at Sat, 09/07/2019 - 12:45 to 12:48
Flash presentation in Water treatment
[CEST2019_00520] Evaluation of Photocatalytic Materials for Water Purification: Overview of the New CEN Standard Test
by Triantis T.M., Kaloudis T., Hiskia A.

TiO2 photocatalysis offers an attractive alternative to conventional water treatment technologies leading directly to the degradation of organic pollutants, compared to transferring them from one phase to another as in the case of membranes or activated carbon. There is an increasing interest on using photocatalysis for water treatment, rendering reliable evaluation of performance of the catalytic materials necessary. Methods for testing photocatalysts used in water treatment are generally not harmonized.

Session: 37, Room: A, at Sat, 09/07/2019 - 10:00 to 10:15
Oral presentation in Water treatment
[CEST2019_00532] Treatment of drinking water by UV/Cl2: a study of β-cyclocitral, a cyanobacterial taste & odor compound.
by Avagianos C., Antonopoulou M., Dimotikali D., Hiskia A., Kaloudis T.

Homogeneous photocatalytic processes are receiving increased interest with regards to drinking water treatment for emerging pollutants. Especially the UV/Cl2 technique has a potential for real large-scale applications as it can combine disinfection with chemical oxidation using processes that are more familiar and widely applied by water supplies.

Session: 37, Room: A, at Sat, 09/07/2019 - 10:15 to 10:30
Oral presentation in Water treatment
[CEST2019_00504] New generation of patterned membranes for water treatment
by Asad A., Sameoto D., Sadrzadeh M.

Membrane technology is an energy-efficient separation process that is expected to dominate the water treatment industry. However, the high vulnerability of membranes to fouling has limited the expansion of sustainable and energy-efficient membrane processes. Surface patterning has been proven to be an effective method to improve the performance of membranes by increasing the permeate flux and lowering the attachment of fouling materials on membrane surfaces.

Session: 31, Room: A, at Fri, 09/06/2019 - 16:15 to 16:30
Oral presentation in Water treatment
[CEST2019_00516] Pollutant Photo-NF Remediation of Agro-Water
by Romanos G., Falaras P., Athanasekou C., Katsaros F., Markellou E., Georgaki E., Kizis D., Karanasios E., Anagnostopoulos C.

We describe the deployment of a novel water purification technology, which was initially conceptualized in the context of a readily successful FP7 project (CLEAN WATER, Grant Agreement no 227017, 2009-2012) and is now in the progress of been upgraded and upscaled thanks to the grants awarded by a LIFE Environment and Resource Efficiency project (LIFE PureAgroH2O, LIFE17 ENV/GR/000387, 2018-2021).

Session: 37, Room: A, at Sat, 09/07/2019 - 09:30 to 09:45
Oral presentation in Water treatment
[CEST2019_00517] TiO2/CoFe2O4/Ag nanocomposites for photocatalytic reduction of water pollutants under UV and solar light
by Ibrahim I., Falaras P.

Novel ternary catalysts TiO2/CoFe2O4/Ag with variable ferrite content were synthesized, characterized and used for the photocatalytic reduction of Cr+6 pollutant, under UV and visible light illumination. Both TiO2 and CoFe2O4 were synthesized using the sol-gel method followed by hydrothermal treatment to prepare TiO2/CoFe2O4 (TCF) composite. Silver nanoparticles were successfully loaded on the surface of TCF to get three different composites, named as Ag/TCF. The crystal structure of the composites was analyzed by application of physicochemical characterization techniques.

Session: 37, Room: A, at Sat, 09/07/2019 - 09:45 to 10:00
Oral presentation in Water treatment
[CEST2019_00437] Susceptibility of Algal Toxins to Advanced Oxidation Processes
by Dionysiou D., Duan X., Kong M.

Harmful algal blooms (HABs) occur more frequently and severely in recent years due to the climate change and increasing nutrient inputs, causing higher potential for the algal toxins to enter drinking water supplies. When HABs formation is intensive, conventional water treatment is insufficient to remove those toxins, so that further advanced technologies are necessary to be added.

Session: 37, Room: A, at Sat, 09/07/2019 - 09:00 to 09:30
Oral presentation in Water treatment
[CEST2019_00171] Water quality control of Aposelemis Dam Reservoir
by Gyparakis S., Diamadopoulos E.

The aim of this study is to check the vertical water quality profile of Aposelemis Reservoir. The water quality was studied in nine (9) different water reservoir depth points: S9: 0 m, S8: 02 m, S7: 03 m, S6: 05 m, S5: 07 m, S4: 09 m, S3: 10 m, S2: 13 m and S1: 15 m. A sudden change in the temperature of the water was observed at the water depth of 7 m (thermocline phenomenon) and a change in pH (from pH> 8 to pH <7.5) at the depth of 3 m. A sharp increase in metal concentration was identified in greater water depth, as well as prevalent the soluble form of them (Mn, Fe, etc.).

Session: 31, Room: A, at Fri, 09/06/2019 - 15:30 to 15:45
Oral presentation in Water treatment
[CEST2019_00175] Monitoring of the main operational parameters of Aposelemis Water Treatment Plant (WTP)
by Gyparakis S., Diamadopoulos E.

The purpose of this study is to present the annual monitoring data of the main water quality operational parameters of Aposelemis Water Treatment Plant (WTP). The main quality parameters studied are: turbidity, pH, suspended solids, conductivity, manganese (Mn), coliform bacteria, Escherichia Coli and Clostridium Perfringens of the untreated and treated surface water of the Aposelemis reservoir. There is a seasonal variation in the turbidity and in the microbiological parameters of WTP incoming water. The Suspended Solids fluctuation follows the entry water turbidity fluctuation.

Session: 31, Room: A, at Fri, 09/06/2019 - 16:45 to 17:00
Oral presentation in Water treatment
[CEST2019_00162] Polyethersulfone/Polyamide11Cost Effective, Antifouling- Nanofiltration Blend Membrane
by Abdallah H., Shalaby M.S., Alanezi A.A., Shaban A.M.

Nanofiltration membranes (NF) are considered and used extensively in seawater softening, food, textile, and mining industries for the removal of di-and multi-valents to increase RO lifetime by decreasing fouling rates, and chemical cleaning intervals. In this work, blend membranes of polyethersulfone and polyamide11 were prepared by phase inversion process. The membranes were characterized by scanning electron microscopy (SEM),pore size distribution, mechanical properties and membranes performance.

Session: 31, Room: A, at Fri, 09/06/2019 - 16:00 to 16:15
Oral presentation in Water treatment
[CEST2019_00062] Potential of Using Real-time OiW Monitoring for Control of Produced Water Treatment in Offshore Oil & Gas Production
by Zhenyu Y., Durdevic P., Jespersen S., Hansen D.S.

From the process control point of view, any reliable and online Oil-in-Water (OiW) measurement could provoke a brand new control paradigm for produced water treatment. However, the real-time OiW monitoring is still an open and ad-hoc situation in recent decades.

Session: 31, Room: A, at Fri, 09/06/2019 - 15:45 to 16:00
Oral presentation in Water treatment