ил, шлам, осадок
- activated sludge
- artificial sludge
- bulking sludge
- densified sludge
- dewatered sludge
- digested sludge
- dried sludge
- excess sludge
- primary sludge
- raw sludge
- recycle sludge
- return sludge
- secondary sludge
- surplus sludge
- swelled activated sludge
- thin sludge
- waste activated sludge