BOT as one kind of invest and financing mode in municipal construction, has been widely applied in the construction municipal sewage treatment plant, but lacks of completed rules and laws now.
BOT作为市政基础建设的一种投融资方式，已经开始广泛地运用在城市污水处理厂的建设中，但目前缺乏完善的法律法规。
Sewage sludge which mainly comes from the primary settling tank and discharge of surplus sludge is the deposit produced in each operating unit in municipal wastewater treatment plant.
城市污泥是城市污水处理厂经各级处理净化污水而产生的沉积物，主要来自初沉池和剩余污泥的排放。
There were anti-nitrification floating sludge, aged activated floating sludge and floating sludge from biological foam in the final settling basin of municipal second stage sewage treatment plant.
二级污水处理厂二沉池漂泥有反硝化漂泥、活性污泥老化漂泥、生物泡沫导致的漂泥。
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