库德拉检测了城市污水处理工厂的样本，并没有发现高难度的尿素。 但是曽有化粪池泄露污染切萨皮克湾和墨西哥湾。
Sewage-treatment plants tested as part of Kudela's study did not discharge much urea, but leaky septic tanks have been known to dump urea into the Chesapeake Bay and the Gulf of Mexico.
办公室污水通过一个化粪池连接至污水泵站。
One septic tank is foreseen for offices sewage network connecting to waste water pump station.
细菌和病毒等致病微生物广泛存在于化粪池、污水污泥、废水等源头。
Pathogens such as bacteria and viruses are widely spread in septic tanks, sewage sludge, wastewater and other sources.
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