Small Scale Direct Potable Reuse (DPR) Project for a Remote Area

• Published in: Water
• Main Authors: Zhang, Jianhua, Duke, Mikel, Northcott, Kathy, Packer, Michael, Allinson, Mayumi, Allinson, Graeme, Kadokami, Kiwao, Tan, Jace, Allard, Sebastian, Croué, Jean-Philippe, Knight, Adrian, Scales, Peter, Gray, Stephen
• Other Authors: Victoria University Melbourne, Veolia, Bendigo Water Treatment Plant, Bendigo 3555, Australian Antarctic Division (AAD), Australian Government, Department of the Environment and Energy, Univ Melbourne, Sch Chem, Melbourne, Vic 3010, Australia, Royal Melbourne Institute of Technology University (RMIT University), University of Kitakyushu (UKK), Curtin Water Quality Research Centre Curtin university (CWQRC), School of Molecular and Life Sciences Curtin University, Curtin University-Curtin University, Institut de chimie des milieux et matériaux de Poitiers UMR 7285 (IC2MP Poitiers ), Université de Poitiers = University of Poitiers (UP)-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS), University of Melbourne
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2017
• Subjects: potable water recycling; ceramic microfiltration; reverse osmosis; ozonation; disinfection by-products; [SDE]Environmental Sciences; Antarc*; Antarctica
• Online Access: https://univ-poitiers.hal.science/hal-04437216; https://doi.org/10.3390/w9020094

International audience An Advanced Water Treatment Plant (AWTP) for potable water recycling in Davis Station Antarctica was trialed using secondary effluent at Selfs Point in Hobart, Tasmania, for nine months. The trials demonstrated the reliability of performance of a seven barrier treatment process consisting of ozonation, ceramic microfiltration (MF), biologically activated carbon, reverse osmosis, ultra-violet disinfection, calcite contactor and chlorination. The seven treatment barriers were required to meet the high log removal values (LRV) required for pathogens in small systems during disease outbreak, and on-line verification of process performance was required for operation with infrequent operator attention. On-line verification of pathogen LRVs, a low turbidity filtrate of approximately 0.1 NTU (Nephelometric Turbidity Unit), no long-term fouling and no requirement for clean-in-place (CIP) was achieved with the ceramic MF. A pressure decay test was also reliably implemented on the reverse osmosis system to achieve a 2 LRV for protozoa, and this barrier required only 2-3 CIP treatments each year. The ozonation process achieved 2 LRV for bacteria and virus with no requirement for an ozone residual, provided the ozone dose was >11.7 mg/L. Extensive screening using multi-residue gas chromatography-mass spectrometry (GC-MS) and liquid chromatography-mass spectrometry (LC-MS) database methods that can screen for more than 1200 chemicals found that few chemicals pass through the barriers to the final product and rejected (discharge) water streams. The AWTP plant required 1.93 kWh/m(3) when operated in the mode required for Davis Station and was predicted to require 1.27 kWh/m(3) if scaled up to 10 ML/day. The AWTP will be shipped to Davis Station for further trials before possible implementation for water recycling. The process may have application in other small remote communities.