combatting ageing
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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。
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.
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