sludge accumulation

例句：

1. 1.The factory's wastewater treatment plant is responsible for the sludge accumulation in the nearby river.
   工厂的废水处理厂负责附近河流的污泥积累。
2. 2. The sludge accumulation in the lake has been a major concern for environmentalists.
   湖泊中的污泥积累一直是环保人士的一大关注点。
3. 3. To prevent sludge accumulation, the company regularly monitors and cleans its sewage systems.
   为了防止污泥积累，该公司定期监测并清理其污水系统。