December 2012, Vol. 24, No.12

Transforming wastewater solids into ‘gold’ through incineration

Wastewater solids and biosolids may be the raw resources that fuel today’s dream — with a little help from incineration

Incincerator art James Rowan, James Welp, Patricia Scanlan, Gustavo Queiroz, and Lori Stone
Alchemists of the Middle Ages sought the magic of converting ordinary materials to gold. The alchemists of the 21st century seek something similar, but the new “gold” is energy — particularly green energy. Effective use of incineration to reduce the volume of wastewater solids updates the zero-energy aspirations of the modern alchemist, while sound science and engineering negate the need for magic. Energy production is feasible today with wastewater solids incineration. Read full article (login required) 


Arsenic removal for refinery wastewater

Comprehensive bench-scale testing identifies a promising combination of technologies for effluent pretreatment

arsenic art Timothy White and Paul Mueller
Preparing to meet updated regulatory discharge standards, a refinery hired a consulting firm to evaluate arsenic removal technologies for various discharge scenarios and to determine the most effective treatment for its particular refinery wastewater characteristics and current pretreatment system. Read full article (login required) 


Improving the culture

A yogurt producer pursues rapid deployment of a new pretreatment facility, facing obstacles along the way

culture art Nathan Zaugg and Huwei (Jack) Yu

Ideally, the establishment of the pretreatment relationship begins during the industrial facility’s planning stages. Both the discharger and receiving facility can agree on the establishment of appropriate discharge limits. Often, communities will make approval from the receiving wastewater treatment plant a condition of receipt of any building permit.

This is the case that a Utah yogurt-production facility faced. Due to the expanding yogurt market, the facility wanted to expand but was unable to do so without a new pretreatment plant. Read full article (login required) 


Operations Forum Features

Operations Challenge 2012

OC12_Logo Jennifer Fulcher with Steve Harrison
At the 25th annual competition, Virginia’s Terminal Velocity wins third Division 1 title and South Carolina’s ReWa Blackwater Bruisers debut as Division 2 champs; and teams talk about the perfect recipe for a winning team. Read full article (open access) 


24 hours to disaster

The creek’s rising, and the plant will be underwater

24 hours art William Jones and Peter LaMontagne

In late summer 2011, the Swatara Township Authority (Hummelstown, Pa.) was wrapping up a $25 million upgrade and expansion at its 24,000-m3/d (6.3-mgd) treatment plant located on Swatara Creek. The forecast called for rain; regional predictions were nothing out of the ordinary. But the local situation turned out to be not so routine.

Two moderate hurricanes were forecast to pass through the area. But it wasn’t until the second storm stalled over eastern Pennsylvania that plant managers realized what was coming. They had just 24 hours to prepare for a 350-year flood that would submerge the entire wet end of the plant. Read full article (login required)