| CPC E03F 1/00 (2013.01) [E03F 5/10 (2013.01); E03F 3/04 (2013.01)] | 16 Claims |
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1. A sewage system comprising:
a first water branching device to which are connected a confluence pipe that introduces sewage, an intercepting pipe that drains sewage into a sewage treatment plant and a first discharge pipe, the first water branching device separating sewage coming from the confluence pipe into sewage to be drained into the intercepting pipe and sewage to be drained into the first discharge pipe; and
a second water branching device to which are connected the first discharge pipe, a second discharge pipe that discharges sewage into a public water body and an inflow pipe for a regulating reservoir, the inflow pipe being connected to the regulating reservoir that stores sewage, the second water branching device separating sewage coming from the first discharge pipe into sewage to be drained into the second discharge pipe and sewage to be drained into the inflow pipe for the regulating reservoir, wherein
the second water branching device includes a channel in which sewage coming from the first discharge pipe is drained into the second discharge pipe, a plurality of overflow weirs erected on at least one of both sides of the channel, a plurality of partitions each provided between each of the plurality of overflow weirs and between the overflow weir arranged downstream and the second discharge pipe, the plurality of partitions each including an orifice formed therein, and a plurality of regulating tanks demarcated by the plurality of overflow weirs and the plurality of partitions, and
the inflow pipe for a regulating reservoir introducing sewage overflowing the plurality of overflow weirs is connected below the plurality of regulating tanks.
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