Abstract
The effect of ammonia removal by aeration during the cultivation of phytoplankton was investigated. The results obtained are as follows.
1) Ammonia removal by aeration was observed during the cultivation of Chlorella in domestic waste.
2) The decrease of total nitrogen concentration was mainly dependent on ammonia removal. Gaseous nitrogen release was not likely to occur during the cultivation.
3) The following equation was obtained for the rate of ammonia removal (R) :
R (%/hr) =3.38×10-11·P10.53·Q·e0.046T where R is temperature (°C), P is pH and Q is air volume per water volume per minute.
4) The rate of aeration is not enough to remove ammonia in outdoor ponds like oxidation pond. But more effective method of aeration will be able to release ammonia from water bodies.
