| 摘要 |
<p>PURPOSE:To biologically treat toxic waste liq. and to reduce the treating cost by packing a first packing material having many small holes and a second packing material capable of eluting the trace elements useful for the utilization of anaerobes in an anaerobic treating vessel. CONSTITUTION:Anaerobes are generated, deposited,and propagated in the many small holes of the first packing material 3a in the anaerobic treating vessel 1. In this case, the trace elements useful for the action of anaerobes are gradually eluted from the second packing material 3b by the appropriate agitation of the packing materials 3a and 3b by an agitating means 4. As a result the toxic waste liq. (e.g., a waste developer used in large quantities in a semiconductor producing factory and having high toxicity) introduced into the anaerobic treating vessel 1 from an inlet 16 is biologically treated by the anaerobes excellently propagated. The water thus treated is discharged from the lower part of a hopper-like part 5 through an outlet 7.</p> |
