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拒絕“污”！我們是認真的

2019-05-27 21:22來(lái)源：深圳水務(wù)

2 城市污水的處理

現代污水處理技術(shù)，按處理程度劃分，可分為一級、二級和三級處理工藝。

污水一級處理為預處理，應用物理方法，如篩濾、沉淀等去除污水中不溶解的懸浮固體和漂浮物質(zhì)。

污水二級處理主要是應用生物處理方法，即通過(guò)微生物的代謝作用進(jìn)行物質(zhì)轉化的過(guò)程，將污水中的各種復雜的有機物氧化降解為簡(jiǎn)單的物質(zhì)。處理后的污水一般能達到排效標準。

三級處理為深度處理，出水水質(zhì)較好，甚至能達到飲用水質(zhì)標準，但處理費用高。

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