Feb 11, 2011

Las Vegas Solids Dewatering Facility Wins Two Awards

Facility received awards from <i>ENR Southwest</i> and APWA-Nevada Section

CH2M HILL announced that the Clark County Water Reclamation District (CCWRD) Solids Dewatering Facility won Southwest Contractor’s Best of 2010 Award for Civil/Public Works in Nevada, and was named the American Public Works Assn. (APWA)-Nevada Section’s Project of the Year in the environmental category.

Southwest Contractor, now ENR Southwest, is an industry publication serving the southwest United States. The annual competition, now in its 13th year, recognizes construction and design excellence in several award categories. The awards were presented in Las Vegas in December at the Palace Station Hotel and Casino.

APWA is an international educational and professional association of public agencies, private sector companies and individuals dedicated to providing high quality public works goods and services. The APWA-Nevada Section Project of the Year award is given in three categories–transportation, structures and environmental–on the basis of service to the public, community need, intricacy of design, aesthetic consideration, difficulty of construction and other related criteria.

CH2M HILL provided the engineering and design services for the CCWRD Solids Dewatering Facility, which is located at CCWRD’s 150-million-gal-per-day treatment plant in Las Vegas. The work, for which MMC Inc. was the general contractor and Harris and Associates was construction manager, consisted of adding a sludge transfer pump station to pump primary and thickened waste activated sludge over a mile to the dewatering facility, two 376,000 gal sludge storage tanks, polymer and chemical mixing and feed systems, eight high-speed centrifuges each capable of handling up to 5,000 lb per hour of sludge, dewatered sludge storage and load out facilities and an extensive odor control system. The heavy industrial dewatering equipment and mechanical systems are housed in a complex four-story building that was designed with contemporary styling that blends in with the surroundings and masks the industrial nature of the facility.

The facility is designed to produce up to 180 dry tons of dewatered solids per day. Some unique features of the facility include:
&#149 High-level automation that allows the facility to operate 24 hours per day with minimal operational staff and during unmanned shifts;
&#149 Capability to dewater primary and thickened waste activated sludge separately or blended;
&#149 Polymer feed systems that allows for the use of two different polymers at the same time;
&#149 Fully automated and enclosed load out facility that allows trucks to load up in about five minutes and minimizes the potential for operational spills; and
&#149 Two-stage odor control systems to minimize odors inside and outside the building.