"Sewage sludge" means sludge arising from urban effluenttreatmentplant 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。
2
For the purposes of heading 38.25, "sewage sludge" means sludge arising from urban effluenttreatmentplant and includes pretreatment waste, scourings and unstabilised sludge.
This method had been adopted by mass effluenttreatmentplant, because it was low innocuity and cleanliness, had great degradation capacity, and can almost degrade all kinds of organic substance.