Fig. 60.
Fig. 61.
Fig. 62.
In both these methods it will be noticed that there is no outer effluent channel, and that the floor slopes from the circumference to the centre, where an effluent receiving chamber is constructed, from which an effluent discharge pipe leads to the next stage in the process. This is not quite so satisfactory as the arrangement shown in [Figs. 59] and [60], but it is the most convenient under the circumstances.