![]() It was a heck of a lot better than putting it on gravel, because it absorbed a lot of the pesticide. It was the standard for six or seven years. “The Swedes applied the rinsate to the top of the biomix and let it seep through into the ground. They collected rinsate and applied it to the top of a simple hole in the ground filled with the biomix material. The Swedes were first to address the problem. Instead, if we capture that rinsate, contain it and treat it, we can make a significant impact on the contamination problem.” “It becomes quite a significant source of contamination. “That’s the worst situation for managing the site,” Braul says. Often, it’s fairly close to the well that supplies the water. This removes the organic matter that absorbs pesticides and allows the pesticide to leach through the soil zone. Often the topsoil is stripped off and replaced with gravel at the site where the farm sprayer is rinsed. It’s too much for the microorganisms to process. Two factors go into that: there’s a concentration of pesticides in one place, and a lot of water washing it down. With a little heat application at the right time, we are probably doubling the decomposition rate they’re getting in Europe.”Įuropean research found that half and up to 90 per cent of pesticide contamination in groundwater could be traced to the places where sprayers were rinsed, Braul says. We can get them up to almost 30 C at the end of May, so they can really start breaking down the pesticides. In a new biobed, we put heat tape at the bottom. Braul says, “Microorganisms like warm conditions.
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