How do wastewater treatment plants work?
How does Sewage Treatment Plant work?
Q48 Process of sewage water treatment before it can be discharged into natural water bodies
Water Treatment Plant
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内部へ:先進的な廃水処理施設
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What is meant by activated sludge process?
Preliminary Treatment
ペーパータオルとカップを使って泥水から沈殿物を濾過する
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嫌気性消化の説明
Waste Water Treatment
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