“Industrial Water Reuse and Desalination”
Thursday, Nov. 6, 2014
Houston, Texas 77012
This Forum will explore the interaction between water and energy use in the process industries and the potential offered by new water management strategies and treatment technologies.
Erika Mancha, Team Lead, Innovative Water Technologies
Texas Water Development Board
What do the regional water planning bodies expect will be the role of alternative sources and water reuse in the future? The speaker will address the capabilities of today’s technology to meet these needs, the direction of research at the state and national level, and how industry can be part of the solution.
Steve Alt, Senior Water Membrane and Desalination Engineer, CH2M Hill
Reverse osmosis (RO) is widely used to desalt brackish water and seawater for drinking and industrial water production and to reclaim wastewater effluent for potable reuse and industrial use. A major impediment to additional implementation of desalination technologies is the lack of an independent tool to evaluate energy consumption and minimization of energy use. The speaker will present the results of this analysis, based on a tool developed for the Water Reuse Research Foundation. This tool assesses currently available and emerging Energy Recovery Devices (ERDs) for desalination systems, and evaluates commercially available ERDs for the treatment of brackish water, seawater, and wastewater effluent.
The presenter will provide an overview of the treatment and ERD technologies incorporated into the tool and present results from case studies using this evaluation approach. Performance metrics include energy consumption, operating costs, and life-cycle costs of these devices, and as well as the overall energy consumption, operating costs, and capital costs associated with the system.
Joseph Wong, Brown and Caldwell
Petrochemical and oil refining facilities use large quantities of water for cooling, process, boiler feed and other miscellaneous plant uses. Traditionally membrane processes such as reverse osmosis (RO) has been used only in boiler feed water treatment systems as pretreatment for deionization (DI) to reduce regeneration chemical costs for water supplies with relatively high total dissolved solids. Due to widespread water shortage in recent years and forecasted water supply effects due to climate change and population growth, water conservation and water reuse are becoming a necessity for these facilities throughout many parts of the world. The advent in membrane technologies, especially microfiltration (MF), ultrafiltration (UF) and RO, has made water reuse more technically and economically feasible over the last 15 years.
This presentation offers an overview of membrane applications in petroleum processing facilities and updates the list of reported worldwide membrane installations in these facilities for effluent treatment and reuse as of late 2014.
Tamim Popalzai, Technical Consultant, WorleyParsons
A new multi-billion dollar Chemical Facilities plant located in Lake Charles, Louisiana is designed to use MBR wastewater technology to treat its oily waste water and re-use the treated effluent combined with clean stormwater for cooling water make-up to reduce plant lifecycle costs.
The wastewater treatment plant (WWTP) at the Chemical Facilities Plant treats various wastewater streams from the plant such as oily process wastewater, non-oily process wastewater, potentially contaminated wastewater and contaminated condensate. All these streams are collected and mixed in an equalization tank. A MBR pilot test was conducted using a “similar” feed composition from existing plants in order to determine the treatment efficiency and effluent quality for re-use.
The treated MBR effluent is planned to be re-used for cooling water make-up in order to reduce plant lifecycle costs. Some of the important criteria for the cooling water make-up quality are TDS (total dissolved solids), hardness, TSS (total suspended solids), TOC (total organic carbon), COD (chemical oxygen demand), and biological activity. As a potential risk, adverse effects of these parameters are to be evaluated (by modelling) to ensure that the treated MBR effluent does not cause any fouling or scaling to the cooling towers as well as not negatively impact the cycles of concentrations. A high level cost evaluation was also conducted to determine the cost reductions in capital and operating expenditures for the cooling towers as a result of using treated effluent as a part of the make-up.
Funding for the Industrial Water Management Forum is provided by the State Energy Conservation Office of the Texas Comptroller of Public Accounts.