Misch Lehrer, Soilutions manager, examines finished compost at the south valley composting facility. Leftovers from Sandia鈥檚 café eventually become organic compost. Credit: Darrick Hurst
(麻豆淫院Org.com) -- At Sandia's largest cafeteria, a leftover burrito will be sent off to eventually help some backyard garden bloom. When someone leaves a bit of lunch behind at Thunderbird Caf茅, employees send it out for composting.
The composting program began in March 2010 as a pilot to divert food preparation waste and leftovers from the regular waste stream that is sent to Rio Rancho鈥檚 landfill to a local business that recycles food waste into usable (and sell-able) compost.
Except for a few initial burps, the program has been a success. 鈥淲e had problems at first with getting noncompostables separated, but it鈥檚 gotten better over time,鈥 caf茅 supervisor Steven Lassiter said.
The composting program won Sandia鈥檚 2011 Environmental Management Systems (EMS) Excellence Award for the Risk Mitigation/Environmental Protection category.
鈥淒uring the six-month pilot last year, the caf茅 diverted more than 15,000 pounds of wet food waste from going into the landfill,鈥 said Sandia/New Mexico鈥檚 recycling coordinator Sam McCord. 鈥淭hanks to the cafeteria staff鈥檚 successful adoption of the composting process and the great results, the program has been fully adopted this year,鈥 McCord said.
Sandia soon will divert more than one-third of Thunderbird Caf茅鈥檚 routine waste into the composting program, he said. Sandia uses revenue from recycling paper and other waste materials to pay for the composting project. One goal is to reduce the cost of refuse disposal at the cafeteria.
McCord also expects the program to expand into other food-service facilities at the Labs, such as the Tech Area 4 cafeteria, where bins are set up for diners to sort their biodegradable materials for composting. Because the Tech Area 4 cafeteria is smaller and requires less variety in its food packaging, it soon will begin using special compostable plates and utensils, McCord said.
Leftovers reborn as compost
In the Thunderbird Caf茅鈥檚 dishwashing and prep areas, caf茅 staff dispose of any plastic items in the regular trash. They then put food scraps and leftovers from dishes into bins lined with bags made from a compostable plant resin.
As the bags fill, they are deposited in special green bins outdoors. These bins are slightly smaller than the trash bins used by the City of Albuquerque for residential trash pickup, as food waste tends to be heavier. Even the bins themselves are recycled and still bear 鈥淢adison, Wisconsin鈥 logos on them, a leftover from where they began life as residential trash bins.
Representatives from food-waste recycler Soilutions pick up the bins twice a week (more if needed). The collected food goes to the Soilutions facility on Albuquerque鈥檚 far south side where it begins its metamorphosis.
When the bins arrive at Soilutions, all the materials are spread out on absorbent material to remove standing moisture. The materials are then combined in a large pile where workers mix them with drier, ground-up materials such as wood chips and straw.
鈥淪oilutions picks up anything that has been alive,鈥 said Misch Lehrer, Soilutions manager. They accept food waste from many area businesses and organizations, such as Whole Foods Market Inc., the Hyatt Regency Tamaya Resort &Spa, the University of New Mexico and Central New Mexico Community College, Lehrer said. Soilutions also accepts manure and straw from area farms, as well as dead and wilted flowers from local flower shops. Additionally, Soilutions harvests scraps from one-time events like the annual Pork 鈥楴 Brew event in Rio Rancho.
鈥淲e鈥檙e basically microbe farmers,鈥 Lehrer said. 鈥淲e provide ideal microbe conditions. We give microbes food, water and air and they do the work.鈥 Lehrer said the compost鈥檚 microbes double in number about every half hour. As they eat, they create carbon dioxide and heat.
According to Lehrer, the composting process takes quite a bit of time. 鈥淚t takes a year to a year and a half for food waste to break down completely into organic compost,鈥 he said. 鈥淔ood waste from the beginning of the pilot program is almost ready to help things grow this spring and summer.鈥
Pollution prevention
Foodwaste composting is only the most recent of Sandia鈥檚 many pollution prevention initiatives. 鈥淚t was an area that we had not taken on before,鈥 said Ralph Wrons, Sandia/New Mexico鈥檚 pollution prevention program coordinator
Wrons said that the program works toward a goal of recycling everything that can be recycled at Sandia. The program helps the Labs procure sustainable products and incorporate sustainable materials management into process and project design practice. Pollution prevention specialists assist the Labs in reducing the use/waste of potable water where alternatives exist. It also encourages Labs鈥 use of green chemistry principles to significantly reduce chemical purchases and reduce waste generation.
Additionally, the group uses days such as Earth Day to educate Sandia employees about sustainable home practices.
Provided by Sandia National Laboratories