| 摘要 |
<p>A method and plant for separation of an aqueous dispersion of particles into separated particles and aqueous solution involves using electrocoagulation treatment followed by removing the particles as a flocculated component, for example by settlement 15. The remaining clarified solution 17 is filtered and the pressure of the clarified solution is monitored at a location 52 prior to its passage through the filter 40. When the monitored pressure is greater than or equal to a predetermined value, the filter is cleaned by halting flow of the clarified solution through the filter, and sending a reverse flow of cleaning solution through the filter for a predetermined time to dislodge sediment deposited on the filters. After the pre-determined period of time, the flow of cleaning solution is stopped and the clarified solution is again allowed to flow through the filter. The filtered solution may be used as the cleaning solution. Suitably, the cleaning solution containing dislodged sediment may be mixed or blended with the aqueous dispersion prior to the entry of the aqueous dispersion into the settling tank.</p> |
