| 摘要 |
An activated sludge system for the purification of wastewater includes a membrane reactor comprising: (i) an array of pairs of vertical membranes ( 14 ) parallel to each other, ( 5 ) the membranes being spaced apart from each other and being permeate to liquid but substantially impermeable to solid particles, (ii) liquid flow channels between the membranes ( 14 ) of each pair, (iii) a liquid-collecting channels communicating with the liquid-flow channels for receiving liquid which has permeated through the membranes ( 14 ), and (iv) gaseous fluid sparging ducts ( 5 ) allocated to and co-planar with the respective pairs of membranes ( 14 ) and extending substantially horizontally for introducing gaseous fluid into a mixture of the liquid and the solid particles about the array, so that the gaseous fluid rises through the gaps ( 8 ) among the outer major surfaces of the membranes ( 14 ), each of the ducts 5 having therealong only one row of sparge holes ( 6 ), those holes ( 6 ) being downwardty directed for emitting the gaseous fluid downwardty.
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