| 摘要 |
<p>Animal slurries obtained from excreta for example from pigs or other intensively reared farmyard animals can be malodourous by virtue of the emission of a range of malodourous or noxious gases including sulphides. The slurries are deodorised by a two-step process in which the slurry is first treated at a pH of over 6.5 with a suitable concentration of a peracid, particularly peracetic acid, and thereafter when the peracid has been substantially consumed, the slurry is acidified to a discharge pH of below 6.5, preferably 5 to 6.2. Disinfection of the slurry can be effected as well to an extent dependent on the peracid concentration selected.</p> |
