"Sewage sludge" means sludge arising from urban effluent treatment plant and includes pretreatment waste, scourings and unstabilised sludge.
“下水道淤泥”，是指经城市污水处理厂产生的淤渣，包括预处理的废物、污垢和性质不稳定的淤泥。
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Ramesh says India has undertaken a 10-year program to ensure no untreated industrial effluent or urban sewage is released into the country's main river, the Ganges.