印染廢水處理與回用工程實(shí)例
印染廢水處理與回用工程實(shí)例
摘要：采用“混凝+ABR+活性污泥+機(jī)械過濾”處理某毛紡廠的印染廢水，出水COD在50mg/L以下，色度低于10倍，優(yōu)于《城鎮(zhèn)污水處理廠污染物排放標(biāo)準(zhǔn)》（GB18918-2002）一級A標(biāo)準(zhǔn)，同時(shí)出水回用于大中色降溫及大色染色工段，回用率60%以上，與改造前比，運(yùn)行費(fèi)用降低一半。
關(guān)鍵詞：印染廢水 ；回用；一級A ；排河
Abstract: Treating the printing and dyeing wastewater of A woolen mill with the” coagulation +activated sludge +ABR+ mechanical filtration “, the effluent COD is under 50mg/L, the chromaticity is less than 10 times, it is better than the” urban sewage treatment plant pollutant discharge standard” ( GB18918-2002) the level of A standard, at the same time ,the cooling water back is used in major cooling and large color dyeing process, the back rate is more than 60%, and compared with the transformation before, the operating cost is reduced to half.
Key words: printing and dyeing wastewater; reuse; level A; Pai River
中圖分類號：X505文獻(xiàn)標(biāo)識碼：A 文章編號：2095-2104（2012）
Abstract：The combined process of coagulating sedimentation, ABR, activated sludge and mechanical filtration is used to treat Hebei a woolen mill wastewater to achieve that the COD is below 50mg/L and color degree is low 10 times, which are better than the Standard A of “Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant” (GB18918-2002). In addition, the output water is reused for water production plants, and the level of wastewater reuse is more than 90%, the operation cost has been reduced by half after the improvement.
Key words：woolen mill wastewater，reused，Standard A, discharge into River
前言
印染行業(yè)是高耗水行業(yè)，據(jù)不完全統(tǒng)計(jì)，截止2005年，國內(nèi)印染行業(yè)每天排水量約450-500萬噸，且因其處理難度。同時(shí)，印染廢水經(jīng)處理后回用率僅7%，是所有工業(yè)廢水中最低的。隨著水資源短缺及水質(zhì)性缺水問題的日益突出，印染廢水的處理和回用日益受到重視。
河北某毛紡廠生產(chǎn)高檔防縮地毯紗，尾水達(dá)到《城鎮(zhèn)污水處理廠污染物排放標(biāo)準(zhǔn)》（GB18918-2002）一級A標(biāo)準(zhǔn)后可排河。同時(shí)，該企業(yè)生產(chǎn)用水取自地下水，而該地區(qū)為地下水超采區(qū)，水資源極其緊張。因此對其污水站進(jìn)行了改
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