Research and analysis

Biobeds: a practical and efficacious method of disposing of pesticide waste and washings

A collaborative project to design and evaluate a biological system, called a biobed, for the disposal of pesticides


Biobeds: A Practical and Efficacious Method of Disposing of Pesticide Waste and Washings - Technical Summary

This file may not be suitable for users of assistive technology. Request an accessible format.

If you use assistive technology (such as a screen reader) and need a version of this document in a more accessible format, please email Please tell us what format you need. It will help us if you say what assistive technology you use.


The project involved a combination of laboratory, semi- field and field studies which assessed the degradability and leachability of six pesticides that would normally be applied to a winter cereal crop. Two biobed systems were investigated, a lined system (with butyl liner) and an unlined system (without butyl liner). Studies indicated that biobeds can adsorb high concentrations of pesticide and subsequently degrade them. Whilst a proportion of the applied pesticide may leach (less than 0.2%), the amounts leached are likely to be small and similar to leachate from currently available systems (eg Sentinel). Field and semi-field studies showed that the ‘lined’ biobed system is prone to water-logging. The management of water is, therefore, an important factor in the working of the biobed and the current design for a ‘lined’ system is inadequate for the high volumes of waste generated on UK farms. Further studies are required to refine the current design and test it at the pilot stage.

Published 1 January 2001