Separated pipes seen as answer to river pollution
Print Edition
SHANGHAI has begun separating rain and waste-water pipelines at older residential buildings that have been cited as a source for downtown river pollution.
Many residents in old residential buildings are found to have installed washing machines on balconies and discharging water from them into rain pipelines that link to nearby waterways, said Liu Xiaotao, deputy director with the Shanghai Water Authority.
Waste water from washing machines leads to excessive nitrogen and phosphorus materials in the rivers, which encourage algae growth and threatens water quality, Liu said.
China issued a revised construction drainage standard in 2010 to prohibit installing washing machines away from designated positions in residential apartments.
Nearly a third of old residential communities have been found discharging waste water into nearby rivers through the rain pipes in downtown Changning District, Shanghai Environmental Protection Bureau officials said.
The city government has begun separating the waste water and rain pipelines at older residential buildings during renovation projects, said Liu. A major separation campaign has been launched in downtown Changning and suburb Jiading districts, he added.
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