Session 19 - Wastewater treatment

[CEST2019_00938] Performance evaluation of a flat sheet self-forming dynamic membrane (SFDM) for municipal wastewater treatment containing organic micropollutants
by Millanar-Marfa J.M.J., Borea L., Castrogiovanni F., Napodano P., Hasan S.W., De Luna M.D.G., Belgiorno V., Naddeo V.

Membrane bioreactors gained increasing interest due to its small footprint and high efficiency. Nonetheless, high capital and operational cost of MBR remains a challenge. With the aim to reduce MBR cost, this study used Dacron mesh to form a dynamic membrane that serves as a substitute to conventional membranes to treat municipal wastewater containing organic micropollutants (OMPs). The SFDM system obtained COD, NH4-N and PO4-P removal of 95%, 47% and 14%, respectively.

Session: 19, Room: A, at Fri, 09/06/2019 - 10:00 to 10:15
Oral presentation in Wastewater treatment
[CEST2019_00937] Novel Polyethersulfone (PES) Alpha-Zirconium Phosphate (α-ZrP) Ion Exchange Mixed Matrix Membranes for Effective Removal of Heavy Metals from Wastewater
by Abdulkarim E., Ibrahim Y., Hasan S., Naddeo V., Banat F.

In this study, novel polyethersulfone (PES) alpha-zirconium (α-ZrP) ion exchange mixed matrix membranes were fabricated via phase inversion method using nano-sized alpha-zirconium phosphate (α-ZrP-n) and polyvinylpyrrolidone (PVP) as dispersant nano-additives in the dope solution preparation. The impact of α-ZrP-n loading on the removal of Cu(II), Zn(II), and Ni(II) from wastewater effluent was studied by varying the α-ZrP-n concentrations from 0.1 up to 1 wt.% while fixing the PES concentration at 10 wt.%. The composite membranes surface morphology was characterized using scanning electron microscopy (SEM) and contact angle. The pure water flux was also determined under vacuum filtration while the removal of all heavy metals was carried out via the inductively coupled plasma - optical emission spectrometry (ICP-OES). The optimal results incorportaing 0.3 wt.% α-ZrP (i.e. Z-2 membrane) showed 98, 86, and 99% removal efficiency of Cu(II), Zn(II), and Ni(II); respectively, and a water flux of 3013.5 L/m2h (MH) that was higher than that reported using the pristine PES membrane (i.e. 985 LMH). These findings suggested that the use of α-ZrP nanoparticles in membranes offers significant potential in heavy metal removal with a considerable high water flux.

Session: 19, Room: A, at Fri, 09/06/2019 - 09:45 to 10:00
Oral presentation in Wastewater treatment
[CEST2019_00904] Systems Improvement And Energy Savings Program For The Existing Conventional Extended Aerobic Treatment Of Domestic Wastewater In Compliance Of DAO 2016-08 New General Effluent Regulations
by Maceda Ma., Cleofas O.

This is a system improvement and energy savings program for a Sewage Treatment Plant treating wastewater coming from a shopping mall operation. Wastewater from shopping mall is considered domestic wastewater, which needs a big volume of water, and produced big amount of wastewater. Generators of wastewater such as in this case, from shopping mall, is mandated to be responsible for the collection, treatment of wastewater, and the ultimate disposal of the treated wastewater, as well as the separated solids, in a manner that is safe, and within the new effluent regulations as provided under DENR Administrative Order No. 2016-08. Under this new effluent regulations which only takes effect on June 2016, shopping mall is now mandated to meet stringent parameters to comply, particularly on Nitrate, Phosphate, Ammonia and Surfactants. To comply the new general effluent regulations, there were innovative solutions and energy programs implemented, resulting of savings in water and energy.

Session: 19, Room: A, at Fri, 09/06/2019 - 09:30 to 09:45
Oral presentation in Wastewater treatment
[CEST2019_00806] Treatment of High Strength Industrial Wastewater utilizing Canna X generalis in a Simulated Vertical Flow Constructed Wetland Set-up
by Heidi A., Ballesteros F., Esguerra G.

In the Philippines, DENR has mandated the regulation of oil and grease, COD, and TSS for automotive parts manufacturers. Wastewaters from industries have varying pollution strength that requires efficient treatment systems of combined physical, biological, and chemical processes. However, these methods tend to be labor intensive and costly. Constructed wetlands have become a popular treatment method for industrial wastewater because of its simplicity requiring less technical expertise compared to other technologies. In this study, four vertical subsurface flow constructed wetlands composed of cylindrical drums with diameter of 30 cm and height of 90 cm were designed to treat industrial wastewater in parallel experiments. The four constructed wetland units had various set-ups (with & without Canna X Generalis, with & without zeolite, with & without air vent) to determine the effect of the treatment efficiency. Water quality samples were collected from each unit, and were analyzed for pH, ORP, TSS, COD, aluminum, oil and grease. The findings show that the constructed wetland with zeolite and air vents demonstrated higher removal efficiency in comparison to a constructed wetlands without these features. The removal efficiencies registered 93.35% and 90.67% for COD and TSS, respectively.

Session: 19, Room: A, at Fri, 09/06/2019 - 09:00 to 09:15
Oral presentation in Wastewater treatment
[CEST2019_00712] Nitrification inhibition test of salty wastewater containing Tetrakishydroxymethyl phosphonium sulphate (THPS), formaldehyde and methanol using salt-adapted nitrifying bacteria, an alternative test method to ISO method
by Chhetri R.K., Kokkoli A., Karvelas S., Andersen H.R.

Nitrification inhibition test is a standard method to test if the chemicals or samples received by wastewater treatment plants (WWTPs) are toxic to nitrifying bacteria in the wastewater treatment plant. Nitrification inhibition test based on ISO method ISO9509 or modified ISO9509 method (REFLAB method) cannot differentiate the toxicity between salt and toxicant in the sample, which is unrealistic for regulation of salty wastewaters that are treated in WWTPs with sufficient volume to dilute salts to harmless levels. To overcome the toxicity due to salinity to the nitrifying bacteria, salt-adapted nitrifying bacteria were grown on the Z400 MBBR carriers. The aim of this work was to validate and compare the nitrification inhibition of samples measured from salt-adapted nitrification inhibition test method (DTU method) with REFLAB method. The new salt-adapted nitrification inhibition test was validated by investigating the statistical uncertainty on the use of new test method with the existing REFLAB method.

Session: 19, Room: A, at Fri, 09/06/2019 - 10:15 to 10:30
Oral presentation in Wastewater treatment
[CEST2019_00405] Quality Improvement of collected rain water by elimination of micropollutants to sea site settlements with the use of new technologies
by Kollias P.S., Kollias V.P., Kollias S.

The continuous increase of water needs in sea site settlements, created the need to collect rain waters in order to use them, after their treatment to achieve the necessary quality improvement. To realize that we need at first to mark the water sources in the neighboring area of the serviced district, in order to collect the necessary water quantities, for the covering of the existing necessities. One part of the sustained pollution is removed from the water treatment installations but the rest remains in the natural medium. Further treatment includes the abstraction of pollutants by natural mechanisms, like biodegradation, photolyse, votalisation, adsorption, degradation, fixation from vegetables. Further water treatment will include addition of rain water coming from roofs and other waters from country side areas, when enough water quantities are available. The water will be treated with conventional methοds, in order to succeed the foreseen quality and finally get transferred to ZONES of REGECTION WITH SUITABLE VEFETATION (ZRV) for the elimination of micropollutants, as well as other pollutant traces.

Session: 19, Room: A, at Fri, 09/06/2019 - 09:15 to 09:30
Oral presentation in Wastewater treatment