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NAWE has extensive experience in designing simple, low-cost, ecological systems to drive specific treatment reactions for our industrial clients. Our engineered wetland systems, in-situ phyto- and bioremediation systems and engineered soil-matrix biofilters help our customers achieve exceptional business and environmental results. NAWE's industrial clients fall into the following sectors.
Agriculture
As the agricultural industry looks for ways to reduce waste, minimize energy and water usage, maximize operational efficiency, and implement long-term environmental management strategies, the industry is turning to green solutions to help with these critical business issues. NAWE delivers evaluation, permits, design, and implementation services so that agriculture-based facilities can achieve their goals and maintain a competitive edge. NAWE has designed a number of successful projects using bioengineering solutions as well as engineered wetlands for the treatment of agricultural waste streams and conservation strategies.
Rahr Malting Company (Shakopee, Minnesota)
NAWE was responsible for developing numerical standards for point/nonpoint source effluent load trading and permit negotiations with the Minnesota Pollution Control Agency for the Rahr Malting Company. The resulting NPDES permit was the first point/nonpoint source trading agreement in Minnesota and the first trading agreement in the US to feature "hard" trades. Rahr Malting won the 1997 Minnesota Environmental Initiative Award for the permit, which has been featured on National Public Radio and in magazines such as Stormwater.
Feature article: Pollutant trading to improve riparian habitats
Christensen Farms (Renville County, Minnesota)
Christensen Farms owns and operates a number of hog farms in the Midwest. Like many concentrated animal feedlots, Christensen Farms reuses water at their facility. They contracted with NAWE to create a wetland-based tertiary treatment system to improve the quality of water for reuse. Four of the facilities were evaluated for the integration of a tertiary treatment system with the aim of reducing pollutant concentrations in the reuse stream. The final design resulted in supernatant from the anaerobic lagoon being routinely discharged to a pre-aeration cell for pretreatment. Afterwards, flow is introduced into a free-water surface wetland designed to polish the water and provide natural habitat for water fowl. Treated water is pumped from the wetlands and reused for barn washwater.
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