09.25.13 -- September's Most Popular Articles & News
Coagulation And Flocculation
Water is clarified through coagulation and flocculation where solids are removed by aggregating suspended particles that settle out of the water. This is used in treating industrial and municipal wastewater. It is also a first step in treating raw water for industrial use and in food and beverage processing. The optimum pH for the process is application-specific and is dependent upon the sample, the agents used, the desired clarity, and the end use. Learn more here.
A Q&A with Craig Correia, Festo Corporation
Without a doubt, automation in water/wastewater plant operations is a growing trend. It makes sense, given the need for accuracy and reliability in today’s regulatory environment, coupled with the reduced manpower attributable to short budgets and a retiring workforce. But many plants have done quite well with the status quo, so what’s to convince them to change? Even then, how does one get started, and what are the cost implications?
For more than 75 years, chlorine has been effectively used to disinfect drinking water, eliminating dangerous bacteria and toxic compounds. Water supply engineers and treatment facility operators are used to necessary risks and problems associated with chlorine disinfection in order to deliver safe water.
In late 2011, Yukon Nevada Gold contacted AdEdge Water Technologies, LLC to design, manufacture, and start up an arsenic removal system for the Ketza River Mine in Yukon, Canada. The site required arsenic treatment of the discharge water from the mine’s tailings pond.
Physical and chemical processes conventionally used to remove iron and manganese from groundwater (aeration plus filtration) led to the discovery of coincident biological phenomena. These were subsequently applied to enhance the performance of certain existing units and, especially, to serve as a basis for a new generation of biological treatment plants. This article illustrates a number of examples, selected from among nearly 200 existing facilities.