| 摘要 |
Disclosed herein is an automatic filtering system, which continuously filters floating material contained in wastewater under automatic control, separately collects the floating material to eliminate the floating material, and continuously discharges filtered water having no floating material. The system includes two sand-type filters and two floating-material collecting tanks each having a pressure sensor which detects internal pressure. One filter and one collecting tank are operated alternately with the other filter and the other collecting tank. Thus, when a filtering performance of one filter is deteriorated, the other sand-type filter is operated. Water filtered by the other filter flows to a filter having a poor filtering performance, thus removing the floating material from the filter, therefore recovering the filtering performance of the filter. Meanwhile, backwashing water containing the floating material is delivered into one collecting tank, so that the floating material is filtered by a filtering net of the collecting tank, prior to being discharged to the outside. The filtered water having no floating material flows into wastewater treatment equipment. When a collecting performance of the filtering net of the collecting tank is deteriorated, the other collecting tank is used.
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