Sewage and treated water can be a heat source in urban area due to large heat capacity, thus recovery and reuse of its energy is one of the most desirable plans for the sewerage system.

由于热容大，污水及其处理后的水可以成为城区的一个热源，因此，人们非常希望在污水系统规划中回收和再利用这些热能。

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He added that sewerage upgrades carried out at pumping stations in 2001 were operating at peak capacity during the storm and that a stand-by pump had also been switched on.

BBC: Promise to act after flood damage