| 摘要 |
PURPOSE: A method for eliminating phosphorus from sewage is provided to overcome the generation of sludge and to save costs required for installation, waste treatment, and chemical. CONSTITUTION: Seawater passes through a reverse osmosis membrane, and the pH value of remaining liquid is adjusted to be in a range between 9.0 and 10.5 such that the remaining liquid is crystallized to obtain crystals. The pH adjusting operation is implemented based on Ca(OH)_2, NaOH, NaCO, or KOH. The crystals are introduced into a phosphorus crystallizing device to eliminate phosphorus. The crystallizing operation is implemented by supplying carbon dioxide into a nano-bubbling device. The crystals include calcium or magnesium cations. |
