The effectiveness of chemical-free water treatment system combining fibre filters, ultrasound, and UV for fish farming on algal control

A chemical-free water treatment systemconsisting of fibre filters, ultrasound, and UV for fish farming was operatedin a fishpond to study its effect on the control of algae compared with a non-treated fishpond.

The results showed that ultrasonication causedefficient sedimentation of planktonic algae. The number of determined algal species was lower in the treated pond. The proportion of green algae and Cyanobacteria was higher in the non-treated pond, and diatoms were the predominant group of algae in the treated pond.

The successful control of algae using the chemical-free watertreatment system suggests that the Chem-free water treatment system can bea practical method to control algal bloom in fish farms.

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