Presentations by Justin Sutherland, PhD, PE
Matches: 14
Using a Pilot Study for Permitting a Design-Build Brackish Groundwater Desalination Plant
This presentation covers brackish groundwater desalinationa pilot study. The study consists of four phases to evaluate three RO membranes (Toray, Hydranautics, and Dow FilmTec), two RO recoveries (85 and 90%), and multiple pre-treatment options (acid/antiscalant, raw water storage, and granular media filters). Permitting an RO membrane facility u...
Treatment of Endocrine Disruptors & Pharmaceuticals through Membrane Process
The results within this report suggest that the discharge of reclaimed RO water may not deteriorate water quality of surface canals, and any of the three tested systems can be used to remove microconstituents and improve the quality of reclaimed water for surface water augmentation....
Effects of Pretreatment on RO Membranes During a Brackish Groundwater Desalination Pilot Study
The San Antonio Water System (SAWS) launched a feasibility assessment as part of its Brackish Groundwater Desalination (BGD) Project. The purpose of the assessment was to evaluate the potential of developing brackish groundwater (1,000 - 3,000 mg/l total dissolved solids) from the Lower Wilcox Aquifer as an additional water supply source to the exi...
Effects of Extended Operation and Air Leaks on RO Membranes During a Brackish Groundwater Desalination Pilot Study
The paper describes a pilot study at the San Antonio Water System to evaluate the performance of Reverse Osmosis treatment and pre?treatment options to meet the Texas Commission on Environmental Quality's (TCEQ) treated water quality requirements. This paper will present the results of the extended operation, air leak testing, and membrane autopsie...
Practical Alternatives to Demonstration-Scale Pilot Testing in Texas
This PowerPoint describes practical alternatives to Demonstration-Scale Pilot Testing in Texas....
Removing Radium with RO and Its Effects on Concentrate Disposal Pipeline Material
The San Antonio Water System (SAWS) is developing brackish groundwater supplies to enhance their available water supply options and help meet the growing water demand in the San Antonio, Texas area. The groundwater is characterized by 1,400 mg/L TDS, dissolved iron up to 0.7 mg/L, moderate silica (9 mg/L), pH 7.3, and 30øC temperature. In addition...
Mass-Transfer Modeling of RO Premeate Post-Treatment by Upflow Calcite Contactors
Reverse osmosis (RO) desalination may be used for desalination of brackish and saline waters, but the product water may have low concentrations of hardness and alkalinity, which may corrode infrastructure. Addition of pH, hardness, and alkalinity may be required to meet potable water guidelines. Upflow calcite contactors may be used instead of li...
Impact of Radium Removal on RO Treatment Residuals During a Demonstration-Scale Pilot Study
This paper is a case study from the City of San Angelo, Texas (COSA) that performance a demonstration-scale pilot study was developed to evaluate the performance of reverse osmosis for radium removal to meet the Texas Commission on Environmental Quality?s (TCEQ) treated water quality requirements. The pilot testing of the RO membranes has been com...
State Regulations and the Efficacy of Various Testing Methods for RO System Design
Normally membrane technologies are approved if they meet national and state drinking water regulations, but the flexibility and strictness of the approval process depends on the State. A key finding was the acknowledgement of the predictive value of computer models for regulatory approval of RO systems....
Using RO/NF Modeling and Testing Methods to Assess the Impact of Changing Water Quality
Discussion on RO modeling versus testing, with recommendations on when to select one or the other. Further discussion is presented on the limtiations of modeling vs testing, along with data requirements and testing guides for modeling and bench scale studies are presented....
Evaluating a Direct Integrity Monitor for RO Membranes in a Potable Reuse Application
The paper presented a study to demonstrate a method with which higher log removal values for virus can be confirmed using a more appropriately sized tracer compound. Currently RO installations at potable reuse facilities can only achieve a maximum of approximately 2-log virus removal credit based on online measurements of conductivity or total orga...
Evaluating the Impact of Pasteurization Pretreatment on Membrane Performance at the Venturawaterpure DPR Pilot Facility
The City of Ventura, CA has taken a proactive approach to further advancing potable reuse as an alternative water supply, with the VenturaWaterPure Demonstration Facility serving as a critical component for demonstrating technical and regulatory feasibility and public acceptance. The demonstration facility included pasteurization, ultrafiltration (...
Pressurized Ultrafiltration Membrane Performance at the Ventura, California Demonstration Plant
Severe drought over the last five years in California have forced municipalities to search for alternate sustainable sources of potable water. In January 2014, Governor Brown declared a drought state of emergency and directed state agencies to take all necessary actions to respond to drought conditions. Part of the series of actions were to invest ...
Identifying RO Pre-Treatment to Mitigate Both Membrane Fouling and Oxidation
This paper will present the RO performance results that lead to membrane fouling and oxidiation, the investigation of their causes, and the evaluation of the pre-treatment approach used to mitigate both for treating a variable blend of surface water sources....