By control of {HEAD ~ such floway operating conditions} as {TAIL ~ water flow rate}, light level, intensity and wavelength, water surge rate, recirculation rate, and nutrient concentrations, the pH of the water adjacent the algal cell wall is caused to increase to a level at which the desired pollutants precipitate 
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By control of { HEAD ~ such floway operating conditions } as { TAIL ~ water flow rate } , light level , intensity and wavelength , water surge rate , recirculation rate , and nutrient concentrations , the pH of the water adjacent the algal cell wall is caused to increase to a level at which the desired pollutants precipitate
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH