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The tubular type and plate-and-frame type are two conventional kinds of membrane modules used for collected human excreta treatment. However. such modules are hindered by high power consumption. blocking of the membrane by fiber components. the need for frequent cleaning and other such problems. Here, the authors investigated the performance and stability of a collected human excreta treatment plant utilizing rotary disk modules developed for the separation of highly concentrated liquid. As a result, it was found that, whether treating activated sludge or coagulated sludge, continuous operation over more than six months can be achieved at a low power consumption and without chemical cleaning. By this the authors have shown that rotary disk modules can be applied to the treatment of highly concentrated residential wastewater.

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