OUTLOOK, Wash. - A Battelle technology brought to the Northwest by researchers at the Department of Energys Pacific Northwest National Laboratory is transforming a waste lagoon into a waste treatment facility at a Washington state dairy.
The George DeRuyter Dairy in Outlook, Wash., has been outfitted since January with InStreem, a technology that enhances naturally occurring biological activity to clean waste lagoons. Henry Pate of Battelles Florida Marine Research Laboratory developed InStreem. Battelle also operates PNNL for DOE.
Lagoons traditionally have been used to store manure and liquid effluents from dairy herds. Wastes stored over the winter months are pumped onto fields in the spring where crops utilize the manures nutrients. However, more nutrients, such as nitrogen and phosphorous, may be applied to crops than can be used effectively.
InStreem is designed to use a dairys existing infrastructure to convert lagoons from waste storage facilities to facilities that solve waste problems, said John Jaksch, PNNL program manager for the project in the Pacific Northwest. In doing so, this technology addresses one of the dairy industrys most pressing issues.
Unlike conventional treatment methods, InStreem converts existing lagoons into extended aeration systems, establishing conditions favorable for both aerobic and anaerobic degradation of wastes.
The aerobic process is designed to remove excess nitrogen and the anaerobic process is designed to remove other nutrient constituents, such as phosphorous. InStreem maintains an oxygen deficit condition in the lagoon and does not over aerate, while still allowing nutrient reduction to take place and bacteria to work on reducing the manure sediments. One InStreem unit treats a lagoon 1 to 1 1-2 acres in size.
To date, the demonstration is exceeding Jakschs expectations. In three months, the depth of solids dropped from six feet to six inches, and that was
Contact: Dawn White
DOE/Pacific Northwest National Laboratory