Presentations by Ufuk Erdal, PhD, PE
Matches: 14
An Integrated Approach to Water Reclamation Facility Design
Discusses a decision model to determine the best treatment process for the City of Oxnard, CA's groundwater recharge process utilizing secondary effluent....
Rejection Capabilities of RO Membrane to Notification Level Chemicals and Selected Endocrine Disrupting Chemicals
Rejection capabilities of Reverse Osmosis (RO) membranes to Total Dissolved Solids (TDS), physical and aggregate and conventional contaminants (i.e., total nitrogen, total organic carbon) have been well demonstrated through pilot and full-scale RO operations. The information regarding rejection capabilities of RO to non-regulated compounds such as ...
Using State of Art Approaches to Manage Concentrate Streams - A Case Study
The City of Santa Maria, CA needed to increase it's water production from groundwater wells in order to meet the city's demand. However, increasing TDS concentrations have forced the city to use RO or EDR in the treatment train. Both of these options have a brine byproduct that the city wants to minimize. The city compared 10 brine minimization and...
Combined Desktop and Bench-Scale Study to Identify Most Suitable Water Stabilization Option
The paper describes desktop evaluations coupled with bench-scale testing to select the right approach for water stabliziation in a post treatment mode based on empirical data rather than assumptions. The study findings are useful for agencies who are looking for Reverse osmosis permeate post-stabilization approaches that produce a low particulate t...
Innovative and Developmental Desalination Technologies, Where are we now?
This paper will summarize application area(s), where and when the technologies have been tested or implemented (if applicable), testing results, state of development, and implementability potential of the technologies in next 5 years. The information presented in this paper will provide a great value for agencies, researchers and consultants who ar...
A Comprehensive Bench Scale Study to Evaluate Chloramine Stability and DBP Formation in Distribution System Carrying Blended Stream of Desalinated and Treated Surface Waters
The information presented in this paper provides a great value for agencies and consultants who are considering use of seawater desalination as a means to supplement current water supplies and plan to introduce desalinated seawater into their existing distribution system. Testing methodology and outcomes of the study are provided....
Evaluation of Virus Removal Capabilities of Membrane Bioreactor (MBR) Systems in a Full Scale Water Reclamation Facility in Nevada
Many water utilities ask why stringent UV disinfection requirements are in place since reclaimed water pathogen limits are mainly met through MBR alone. The energy use and associated cost for UV disinfection may be an impetus for some facilities to contemplate turning their UV reactors down to a lower operating dose setting without compromising reg...
A Novel Application of the Tertiary Membrane Bioreactor Technology for Water Reuse - A Comprehensive Pilot Testing
Membrane bioreactors (MBRs) combine secondary treatment and solids separation in one system that produces high quality effluent with virtually free of solids. Coupled with widely used biological nutrient removal (BNR) technology, MBR can meet stringent effluent total nitrogen (TN) and total phosphorus (TP) limits, especially where site space limita...
Virus Removal Capabilities of an MBR System in a Full-Scale Water Reclamation Facility
The paper portion of this file discusses a pilot ceramic membrane at El Toro CA Water Recycling Plant. The PowerPoint portion of this file discusses the virus removal capability of a polymer based MBR water reclamaion system at City of Henderson NV which uses a municipal wasterwater source....
Status of Potable Reuse in California: History, Regulations and Projects
This paper provides a historical perspective on how the groundwater recharge regulations have evolved and type of projects implemented over the time in California and highlight current status of Indirect Potable Reuses via surface water augmentation and direct potable reuse regulations....
Is Ozone Pretreatment Best Approach for Improving MF/UF Productivity?
This paper describes a detailed assesment and comparison of a 2 MGD pressurized microfiltration facility that treats secondary effluent from a non-nitrifying facility with or without ozone treatment. The results should aid designers of similar facilities as to use or not use ozone as a pretreatment....
Can MBR Replace MF/UF in a Potable Reuse Train-Implementation Concerns?
Indirect potable reuse (IPR) projects via groundwater injections in California utilizing full advanced treatment require MF/UF, RO and UV advanced oxidation to meet pathogen, TOC, trace organic and other requirements specified in the most recent groundwater recharge regulations (California Department of Public Health, 2014). The main functions of M...
How Can We Meet Pathogen LRV Requirements in Potable Reuse Projects If MBR Does Not Get Any Pathogen Credits?
This paper summarizes cost effective and proven approaches/methods to get similar pathogen credits when MBR replaces MF/UF in potable reuse trains. The findings of this paper are highly valuable for agencies, regulatory agencies, consultants and individuals who are involving in potable reuse projects and or helping developing a frame work for fort...
High Recovery RO - Challenges to Meet Stringent Nitrogen Limits in Reservoir Augmentation Indirect Potable Reuse Projects
Reducing RO concentrate flows generated from RO based advanced treatment facilities has become a major interest of agencies located in inland areas where surface discharges may not be possible. To meet this objective, many agencies are considering incorporating a high recovery RO concept into the AWTF design. However, depending upon nature of secon...