| 摘要 |
The invention relates to a method for the purification of effluent, in particular, effluent from the paper industry, comprising the following method steps: a) aerobic purification of the effluent using activated sludge in an activated sludge tank (1), b) settling of at least a part of the effluent/activated sludge mixture exiting the activated sludge tank (1) in a settling tank (2), c) separation of a part of the effluent/activated sludge mixture exiting the settling tank in a separating device (3) and d) recycling of at least a part of the activated sludge separated off in steps b) and/or c) into the activated sludge tank (1).
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