| 释义 |
activated sludge noun[ U ] uk /ˌæk.tɪ.veɪ.tɪd ˈslʌdʒ/ us /ˌæk.tə.veɪ.t̬ɪd ˈslʌdʒ/ sewage(= waste matter such as water and human waste) that goes through a process using oxygen to encourage bacteria to break down the waste. This is then added to new sewage to help it break down more quickly: Activated sludge uses microorganisms to break down organic matter in wastewater. The sewage works is a conventionally laid-out, activated sludge plant. The bacteria formed typical activated sludge. Local environmental groups challenged a previous attempt to use activated sludge. A common problem encountered in the operation of activated sludge plants is when a portion of the sludge does not settle properly. SMART Vocabulary: related words and phrases Rubbish and waste anti-litter anti-littering debris dejunk dejunking garbage disposal gubbins high-level waste influent jetsam litter muck rubbish sewerage shavings skip diving slag spoil tat white elephant |