污水處理中有污泥的5種原因及對(duì)策
1、沖擊負(fù)荷的存在
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SV：沉降緩慢 上清液彌漫性渾濁。 -
DO：同等曝氣DO明顯偏低 大約低30% -
污泥增長(zhǎng)：污泥增長(zhǎng)迅速 每天約20%增長(zhǎng)量。 -
F/M：F/M超過了0.5
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SV30：沉降速度加快（3min內(nèi)完成90%的過程）；活性污泥壓縮性增加（SV30低于8%）；沉降顏色過深（呈深棕色）。 -
DO： 曝氣減小 DO仍偏高 -
污泥增長(zhǎng)：較之前減少
3、活性污泥中毒
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SV：上清液渾濁, 污泥顏色暗淡 ,上清液始終處于渾濁狀態(tài)與沉降時(shí)間沒有關(guān)系。 -
DO：同等曝氣力度DO比平時(shí)高。 -
污泥增長(zhǎng)：新增的污泥不可見 ，MLSS呈下降趨勢(shì)?；钚晕勰酀舛认陆灯陂g正式活性污泥解體持續(xù)期 ，排水夾帶顆粒最為明顯， 消除有毒的或惰性物質(zhì)后通常一周能恢復(fù)正常。但是恢復(fù)期間因污泥增長(zhǎng)活性強(qiáng)排水仍夾帶顆粒物質(zhì)。
4、沉降過程中出現(xiàn)反硝化現(xiàn)象
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SV：活性污泥先沉降后上浮上浮活性污泥經(jīng)攪拌又會(huì)下沉。 -
DO： 缺氧狀態(tài)
5、曝氣過度
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SV： 整個(gè)沉降過程中，上清液內(nèi)的細(xì)小顆粒較多， 既有下沉的也有緩慢上浮的且顆粒間水體呈蒙朧的感覺。 -
DO：長(zhǎng)期高曝氣 （低負(fù)荷）
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