assessing the sound frequency impact on the growth of dunaliella salina (green microalgae)

The use of physical signals is one of the new promising methods for enhancing the microalgae growth rate# in this experiment, the microalgae dunaliella salina was cultivated in modified johnson medium and nutrient deficiency conditions with the addition of a sound frequency of 200 hz# the aim of this study was to evaluate the effect of sound frequency on harsh and sub-optimal circumstances# the audible sound was continuously generated for microalgae culture on the 3th day after inoculation# the result showed that despite n-limited culture without sound frequency (17% reduction compared to the control), the n-limited culture with sound frequency experienced the highest growth rate almost 25% growth relative to the control#