INVESTIGATIONS INTO THE USE OF STRAW TO CONTROL BLUE-GREEN
Report No FR0285
H A James
It has been demonstrated that decomposing barley straw inhibited the growth of a number of green algal species. However, there was no comparable evidence of a similar effect for blue-green algae. If such an effect could be shown, an appropriate means of dosing water bodies with the inhibitory factor would be desirable.
Decomposing barley straw can be used to control the growth of blue-green algae.
Work on the utility of a bankside digester system to produce the anti-algal agent(s) from barley straw, and to develop a suitable dosing system to treat large water bodies should continue, to allow the feasibility of this approach to be evaluated.
V RESUME OF CONTENTS
From laboratory experiments conducted with a toxin-producing strain of Microcystis aeruginosa, up to 95% inhibition of algal growth was achieved with as little as 2.7 g/m3 straw. Preliminary experiments with other strains of Microcystis aeruginosa produced similar results. Investigations with a prototype bankside digester for the remote production of the anti-algal factor(s) from barley straw, to determine the feasibility of controlling blue-green algal growth in large water bodies, have commenced.
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