The EPA even recommends that restaurants utilize "reusable utensils, dinnerware, napkins and placemats" as a key tactic for Source Reduction. (*Decision-maker's Guide to Solid Waste Mgt, Vol. II" University of Wisconsin & EPA, 1995)
Dempsey’s Laundering Maximizes Conservation
Heat Reclaimer & Boiler Stack Economizer
Dempsey employs a sophisticated wastewater heat recovery system captures the heat from the process wastewater to preheat the incoming fresh water using a shell and tube heat reclaimer. This process can effectively preheat that water to within 5ºF of the dirty wastewater stream, thereby recovering up to 60% of the water heating energy required. Preheated fresh water then travels through a boiler stack economizer where boiler exhaust further preheats it. The hot gases are normally cooled to within 10 to 15 degrees of the incoming water temperature and amounts to a 10-20% energy recovery of the on-line boiler load. This system allows Dempsey to conserve natural gas that would otherwise be necessary to heat the incoming water.
The finishing equipment and process, adopted from successful European operations, use significantly less natural gas than older systems. In addition, steps were taken to ensure all electric motors are soft-start or variable speed and rated high efficiency, allowing Dempsey to conserve electricity.
Natural & Efficient Lighting
Dempsey’s physical facility incorporates “daylighting” using large windows and skylights, high efficiency lighting, a reflective white rubber membrane roof, high r-value insulation and computer-controlled heating and cooling equipment, allowing Dempsey to conserve electricity for lighting.
In 2011, Dempsey improved the efficiency of its lighting by replacing 200 high bay halogen lights with high efficiency T8 fluorescent lights. The T8 fixtures require about half the energy of the fixtures that were replaced.
Comprehensive Utility Management System
Dempsey's utility management system enables extensive metering and intelligent analysis of water, gas and electric data to minimize utility costs and optimize equipment utilization.
Delivery Efficiency. (We deliver “GREEN!”)
Dempsey utilizes Roadnet Territory Planner routing technology for route path optimization. This allows Dempsey to reduce miles driven, which means less fuel consumption and a smaller carbon footprint.
Dempsey also utilizes cutting-edge fleet management and optimization technology to minimize our carbon footprint. This system allows Dempsey to optimize fuel economy by reducing engine idle time, reducing speed, and by optimizing driving techniques such as rapid acceleration. With real-time alerts from the truck's engine computer, Dempsey is also able to identify vehicles that are not operating as efficiently as possible in between scheduled maintenance.
Continuous Batch Tunnel Washer (CBT)
Dempsey CBT Washers are designed to reduce water consumption by 50 percent compared to conventional systems through engineering efficiencies and water reuse, allowing Dempsey to conserve over 15 million gallons of water per year.
Dempsey reduces water, detergent and energy use by reclaiming light soil wash water and reusing it for the pre-wash of heavily soiled items. We reuse the hot, soapy wash water from very light soil items such as sheets and pillow cases and use it for the pre-wash rinses of heavily soiled items such as kitchen towels. This innovative reuse allows Dempsey to conserve more than 8 million gallons of water per year.
In an effort to reduce the dependence on natural steel resources and to preserve space in our landfills, Dempsey has intensified efforts to re-use at least 65% to 70% of garment hangers through its on-site customer reclaim programs. In a partnership with Allied Services, people with disabilities help reclaim used hangers for reuse. As of 2010, this program had diverted 608,000 lbs from landfills and avoided the equivalent carbon dioxide emissions of 168 cars annually.
Dempsey's production recycling program includes wood, plastic, cardboard, paper and metal. On average this program diverts over 30 tons of material each year from landfills for recycling.