Industrial Water Reclamation and Reuse in India
Dr. Josef Lahnsteiner | VA TECH WABAG | Austria
Four Indian industrial water reuse cases are presented: ZLD in a coal gasification facility (reuse of brine in ash handling), reuse of petrochemical and refinery effluents as boiler makeup as well as reuse of municipal secondary effluent in the automotive supplying industry. As main topics, water reclamation processes, reuse applications, operating cost and brine disposal management are discussed.
The Dow Terneuzen 2025 water reuse concept – Incorporating over 20 years of industrial water reuse experience
Dr. Jochen Henkel | Dow DuPont | Germany
Marc Slagt | Dow Benelux BV | Netherlands
Prof. Dr. Niels Groot | Dow Benelux BV | Netherlands
The water reuse concept of the Dow Terneuzen site is worldwide recognized as a milestone project for industrial water applications. The original concept was implemented in the late 90s to expand the facility’s production capacity and driven by the limited freshwater availability in the region. It was time to review the concept and to incorporate the valuable lessons learned over the past two decades of operation.
The goal of the new concept foresees to maximize the reuse of the wastewater sources (municipal + industrial), to minimize/eliminate the current Biesbosch freshwater source and at the same time to enable future capacity increase by 20%.
The presentation will discuss the main challenges and limitations of the current concept. We will introduce a new concept that overcomes these limitations but at the same time maintains the level of redundancy, cost efficiency and increases the level of robustness.
However, the goal of the presentation will be to overcome the preconception that complex water layouts are difficult to operate and expensive. We will demonstrate that the true value of an enhanced and state of the art concept is only discovered with a different engineering mindset and if the boundary of the system is not limited to the water treatment but extended to the manufacturing/production site. Consequently, the success of such projects depends significantly on the willingness to cooperate and interchange knowledge beyond the typical and often limited scope of a water treatment plant.
Advanced RO for water reuse and brine concentration in Copper Smelter effluents
Carlos Echevarria | Cetaqua, Centro tecnológico del agua | Spain
The aim of the present study is to evaluate the influence of implementing flow reversal concept in reverse osmosis systems for water reuse as pre-concentration stage for ZLD implementation in Copper smelters. A 600 L/h permeate capacity pilot was employed to conduct a baseline trial as well and two additional flow reversal tests with flow reversal every 45 and 30 minutes.
Overall results from these tests indicate that it is technically feasible to achieve at least 75% recovery rates to the blend of the softened Copper smelter. Flow reversal has shown to supress scaling and improve RO performance when reversal times of 30 minutes or lower are applied.
By using the effectively undersaturated feed to sweep away the scale particles, extensive precipitation is prevented, achieving higher recoveries of water to be reused as well as lower volumes of brine to be processed in the downstream energy-intensive evaporator crystallizer.
Water Reseach Foundation’s Agricultural Water Reuse Research Efforts
Justin Mattingly | Water Research Foundation | United States
The WRF agricultural water reuse research portfolio includes fifteen projects covering topics in economics and policy, sustainable practices, and management approaches. Several research efforts are currently underway. This presentation will provide an overview of the ag program and latest information on the projects in progress.