| 摘要 |
A membrane treatment plant having at least two stages (53), (69), (75) arranged serially is disclosed. Each stage (53), (69), (75) comprises at least four membrane units (55) arranged in parallel, with each membrane unit (55) having an inlet (57), a feed/concentrate outlet (59) and a permeate outlet (61). Each stage (53), (69), (75) has a common inlet header (51), (67), or (73) and a common outlet header (65), (71), or (77), with the common outlet header (65) (71) of an upstream stage connecting to has the common inlet header (67) (73) respectively of an immediately downstream stage. Each membrane unit (55) has an inlet flow control valve (93) connecting between its inlet (57) and the common inlet header of the stage in which it is located, and an outlet flow control valve (63) connecting between its outlet (59) and the common outlet header of the stage in which it is located. The inlet flow control valve (57) and outlet flow control valve (63) are operable to isolate the membrane unit (55) from its common inlet header and common outlet header to allow cleaning of said membrane unit to take place without disrupting operation of the remaining membrane treatment plant. A control system for the membrane treatment plant is also disclosed.
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