CARY, N.C., Jan. 28, 2002 -- The city of Carmel, Ind., has selected the BioPasteur™ process by USFilter's Kruger Products to upgrade its wastewater treatment plant. The patented BioPasteur process, the first of its kind in the United States, will produce Class A biosolids allowing the city to use the plant's biosolids for beneficial reuse.
Dan Miller, of Jones & Henry Engineers, says, "The City of Carmel selected the BioPasteur process based upon the benefits the system provided and compatibility with existing facilities. The major benefits included: the production of a Class A biosolids desired by local farmers and soil blenders without increasing solid volumes, maximizing use of existing digester facilities, utilization of generated methane gas, and a simple process which fits well into the plant's existing footprint and operational scheme."
The BioPasteur process heats sludge to 158(F (70(C) for a minimum of one hour to provide pathogen destruction. The BioPasteur process consists of two main unit operations-a heat exchanger system and holding vessels. The process utilizes a traditional concentric pipe sludge heat exchanger unit which has been modified to permit the controlled heating of incoming unconditioned sludge and cooling of pasteurized sludge to the digester target temperature after it exits the pathogen reduction vessels. This recapturing of latent heat from hot sludge makes this process an energy-efficient way to achieve pathogen reduction.
The BioPasteur process is an extremely small-footprint process that can easily be placed ahead of an anaerobic digester system for the benefit of reducing pathogens to Class A levels. The BioPasteur process also alleviates any risk of pathogen short-circuiting.
As part of the WWTP's system upgrade, USFilter will work closely with the city of Carmel and Jones & Henry Engineers, Ltd. to customize the BioPasteur process to the plant's specifications. Jones & Henry has been working with the city of Carmel for over ten years and have been evaluating biosolids treatment systems for the last three years. Before deciding on the BioPasteur process, Jones & Henry and the city evaluated numerous Class A technologies that would allow for the beneficial reuse of the plant's biosolids. The project will be completed in the spring of 2003.
USFilter has developed a number of innovative technologies to help municipalities manage their biosolids. Technologies from digestion to pasteurization to composting turn wastewater residuals into high-quality Class A biosolids that are safe for land application. USFilter's cutting-edge Class A biosolids technologies and research, like the BioPasteur process, help communities across the country recycle material for return to the environment.
USFilter, a Vivendi Environnement company, is North America's largest water company providing comprehensive water and wastewater systems and services to commercial, industrial, municipal and residential customers. Vivendi Environnement (NYSE:VE), comprised of Vivendi Water (worldwide water products and services), Onyx (solid waste and industrial services), Dalkia (energy management), and Connex (transportation and logistics), is the largest environmental services company in the world with more than 215,000 employees in 100 countries and annual revenues of nearly $25 billion. Visit the company's web sites at www.usfilter.com or www.vivendienvironnement-finance.com.
