Since the operating conditions are carefully adjusted to allow the pH of the water to remain below {HEAD ~ the pH level} normally required for precipitation, {TAIL ~ precipitation} of the pollutants occurs only onto and into the algal cell wall, and not into the water column as a whole 
Since the operating conditions are carefully adjusted to allow the pH of the water to remain below { HEAD ~ the pH level } normally required for precipitation , { TAIL ~ precipitation } of the pollutants occurs only onto and into the algal cell wall , and not into the water column as a whole
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH 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