| 摘要 |
Apparatus for moving alum sludge which comprises a device for collecting alum sludge from the bottom of a settling tank, moving the aqueous sludge to a pneumatic collector, closing off the collector, and pneumatically moving the sludge to a discharge pipe, and conducting the operation in tandem with a second, with appropriate means for interconnection of the two units, to permit discharge from one while the other is being filled with sludge.
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