名词
中文翻译：次级污泥
同义词：
['secondary wastewater', 'secondary effluent例句：1. The treatment plant produces secondary sludge as a byproduct.（处理厂作为副产品产生次级污泥。）']
例句：
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1. The treatment plant produces secondary sludge as a byproduct.
处理厂作为副产品产生次级污泥。
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2.The wastewater treatment process involves removing and treating secondary sludge.
废水处理过程包括去除和处理次级污泥。
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3.The secondary sludge is then pumped to the landfill for disposal.
次级污泥随后被泵送到垃圾填埋场进行处理。