Industrial Wastewater
Responsible for managing your company's wastes? Then this publication is essential for you. Industrial Wastewater discusses relevant regulatory and legal issues, provides examples of real-world treatment options, and offers suggestions on minimizing waste and preventing pollution to help both your compliance record and your bottom line.
Volume 8, Number 5
October/November 2009
NEWS
Researcher Combines Light and Electrical Current To Remove Contaminants From Wastewater
Innovative treatment technique shows efficiency for removing nitrophenols
A new experimental approach for treating wastewater based on combining two advanced water purification methods has yielded very promising results. Aicheng Chen, an associate professor and Canada research chair of material and environmental chemistry at Lakehead University (Thunder Bay, Ontario, Canada) created a bifunctional electrode, which is coated with a photocatalyst on one side and an electrocatalyst on the reverse side. The goal is to simultaneously employ photochemical degradation, in which light and a photocatalyst break down pollutants, and electrochemical oxidation, in which electricity and an electrocatalyst remove contaminants.
According to Chen, the study demonstrated that when these two processes were combined, the treatment efficiency was much greater than either method alone.
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A Big Solution in a Small Package
Scientists discover that nanomaterials can remove dye from textile wastewater and are cheaply and easily reused adsorbents
In India and China, the textile industry represents a large portion of the national economy, as textiles are one of their prime exports. But textile production requires dye consumption, which raises the issue of how to properly dispose of the remaining dye postproduction. Insufficient treatment of wastewater from textile manufacturing plants could introduce toxic and hazardous byproducts to groundwater and surface water. Unfortunately, removing all dyes from industrial wastewater has proven to be a bit of a challenge.
Recently, scientists have begun to explore using nanotechnology to remove textile dyes from wastewater. In this story is a discussion of the research conducted by two groups of scientists in the area of nanotechnology and textile plant wastewater. The first group, composed of scientists from the Colorado School of Mines (Golden) and South-Central University of Nationalities (Wuhan, China), experimented with metal oxide nanosheets. The second team of researchers, at the Indian Institute of Technology (Madras), worked with patented nanocomposites.
FEATURES
What Would It Take?
Minnesota investigates the feasibility of statewide industrial water reuse
Deborah Manning and Patti Craddock
Noting the growing interest in water reuse, the Minnesota Legislature hired Metropolitan Council Environmental Services to answer key questions about the feasibility of using treated municipal wastewater as an industrial water supply. The Legislature anticipated that, if feasible, water reuse would slow aquifer depletion and provide a reliable, longterm, potentially less expensive source of nonpotable water for industries.
Completed in June 2007, the study, titled “Recycling Treated Municipal Wastewater for Industrial Water Use” answered the following questions:
* What are the current and future drivers for industrial reuse?
* Who are the industrial reuse stakeholders?
* What are the implementation issues involved?
A Powerful Challenge
Treatment plant upgrade aims to minimize electrical conductivity while nearly doubling capacity
James C. Young, Madan Arora, Lewis Nelson, and Richard Bono
Tulare, Calif., needed to upgrade its industrial wastewater treatment plant so it could handle nearly twice as much influent and more easily produce effluent suitable for irrigation and aquifer recharge. Among other challenges, the upgraded treatment system had to control pH while minimizing electrical conductivity. After evaluating various pH-control chemicals, the project team designed a new system that relied on nitrification and denitrification to keep effluent quality within discharge limits.
©2009 Water Environment Federation. All rights reserved.