Bion Announces New Dairy Waste Treatment And Wetland System.

DENVER--(BUSINESS WIRE)--April 30, 1999--

Bion Environmental Technologies, Inc. (OTC BB: BION) announced today that it has signed a contract for the design, installation oversight, and operation of a Bion NMS(TM) animal waste treatment system for Plato Brook Farms, L.L.C. in Wyoming County, New York.

The system for this 1,600-cow dairy will biologically treat the waste generated in the dairy's freestall barns and milking parlor, converting the nutrients and other solids into the basic components of BionSoil(TM). The remaining liquid waste will be further treated in a polishing ecoreactor that utilizes patented naturally constructed wetland technology. The water produced by this phase of the process will be of sufficiently high quality that it can be reused or discharged under appropriately permitted conditions. This is the second Bion system in New York to use the polishing ecoreactor as a final step in producing clean water.

Jon Small, Bion Vice President of System Sales and Marketing, said: "We are very excited about the prospect of installing another Bion NMS with the final water polishing process to treat both the solid and liquid waste. These systems create an attractive wetland like environment, providing habitat for a variety of birds and wildlife at a time when wetland destruction is of such great concern in the United States. Being recognized as an environmental steward sensitive to the environmental impact of large scale farming is becoming attractive to an industry that has been much maligned recently."

The Company's patented biological treatment technology has now been in use in the dairy industry for eight years and has successfully treated the waste and odor problems associated with these and other large livestock operations at sixteen locations in five states. Small added, "We have significantly increased our sales efforts in both New York and the West Coast and this contract is further evidence of Bion's ability to market its systems to the livestock industry. With our proven track record and the increased regulatory pressure being directed at the livestock industry, we anticipate a significant increase in our system sales activity."

Bion Environmental Technologies, Inc., designs and operates advanced organic waste and wastewater treatment systems for a variety of industrial and agricultural applications. Bion systems rely on patented biological and engineering processes with construction and maintenance costs significantly less than traditional technologies. The Company's primary focus is the livestock industry, providing proven solutions to the nutrient and odor management problems associated with large dairy and hog farms. In almost all livestock applications, the waste is bioconverted into a nutrient-rich, organic material (BionSoil) which both Company and University sponsored growth studies have shown to have remarkable plant growth-enhancing characteristics. Research and test marketing indicates there is a substantial market for BionSoil products. The Company currently has offices in Colorado, New York, Florida, and North Carolina. Direct any inquiries to Jon Small at [phone] or Craig Scott, shareholder and broker relations at [phone].