| 摘要 |
<p>A method for taking care of nitrogen present in a liquid obtained by at least rough-filtrating a sludge comprises the steps of increasing the pH value of said liquid to be ‰¥ 10 by making additions thereto, withdrawal of ammonia gas from said liquid and conducting said ammonia gas into a solution containing calcium nitrate so as to form at least ammonium nitrate therein.</p> |
