工業污水
工(gong)(gong)業(ye)廢水(shui)(industrial wastewater),指工(gong)(gong)藝生(sheng)(sheng)產過(guo)程(cheng)中(zhong)(zhong)排(pai)出(chu)的(de)廢水(shui)和廢液,其(qi)中(zhong)(zhong)含(han)有隨水(shui)流失的(de)工(gong)(gong)業(ye)生(sheng)(sheng)產用料、中(zhong)(zhong)間產物、副產品以及生(sheng)(sheng)產過(guo)程(cheng)中(zhong)(zhong)產生(sheng)(sheng)的(de)污(wu)染物,是造(zao)成(cheng)環境(jing)污(wu)染,特別是水(shui)污(wu)染的(de)重要原因。工(gong)(gong)業(ye)廢水(shui)的(de)處理(li)雖(sui)然早在(zai)19世(shi)紀(ji)末已經開始(shi),但由于許多工(gong)(gong)業(ye)廢水(shui)成(cheng)分復雜,性質多變,仍有一些技(ji)術問題沒有完全解決。
基(ji)本分(fen)類
1、按受污染(ran)(ran)程度不同(tong),工業廢水(shui)可分為生產廢水(shui)及(ji)生產污水(shui)兩類。生產廢水(shui)是指在(zai)(zai)使用(yong)過程中(zhong)受到輕度污染(ran)(ran)或(huo)溫(wen)度增高(gao)的水(shui)(如(ru)設備(bei)冷卻(que)水(shui));生產污水(shui)是指在(zai)(zai)使用(yong)過程中(zhong)受到嚴(yan)(yan)重污染(ran)(ran)的水(shui),大多具有嚴(yan)(yan)重的危(wei)害性。
2、按(an)工業(ye)廢(fei)(fei)(fei)(fei)水(shui)(shui)(shui)(shui)中所(suo)含(han)主(zhu)要污染(ran)(ran)物(wu)(wu)的化學(xue)性(xing)質(zhi)分類,可分為含(han)無機(ji)(ji)污染(ran)(ran)物(wu)(wu)為主(zhu)的無機(ji)(ji)廢(fei)(fei)(fei)(fei)水(shui)(shui)(shui)(shui)、含(han)有機(ji)(ji)污染(ran)(ran)物(wu)(wu)為主(zhu)的有機(ji)(ji)廢(fei)(fei)(fei)(fei)水(shui)(shui)(shui)(shui)、兼含(han)有機(ji)(ji)物(wu)(wu)和無機(ji)(ji)物(wu)(wu)的混合(he)廢(fei)(fei)(fei)(fei)水(shui)(shui)(shui)(shui)、重金(jin)屬廢(fei)(fei)(fei)(fei)水(shui)(shui)(shui)(shui)、含(han)放射(she)性(xing)物(wu)(wu)質(zhi)的廢(fei)(fei)(fei)(fei)水(shui)(shui)(shui)(shui)和僅受熱污染(ran)(ran)的冷卻水(shui)(shui)(shui)(shui)。例如電鍍廢(fei)(fei)(fei)(fei)水(shui)(shui)(shui)(shui)和礦物(wu)(wu)加工過程(cheng)的廢(fei)(fei)(fei)(fei)水(shui)(shui)(shui)(shui)是無機(ji)(ji)廢(fei)(fei)(fei)(fei)水(shui)(shui)(shui)(shui),食品或石油加工過程(cheng)的廢(fei)(fei)(fei)(fei)水(shui)(shui)(shui)(shui)是有機(ji)(ji)廢(fei)(fei)(fei)(fei)水(shui)(shui)(shui)(shui)。
3、按(an)工業企業的產品和加工對象可分(fen)為造紙(zhi)廢水(shui)(shui)、紡(fang)織廢水(shui)(shui)、制(zhi)革廢水(shui)(shui)、農藥廢水(shui)(shui)、冶金廢水(shui)(shui)、煉油(you)廢水(shui)(shui)等(deng)。
4、按廢(fei)水中所含(han)污染物(wu)的(de)主要成(cheng)分(fen)可分(fen)為酸性(xing)廢(fei)水、堿性(xing)廢(fei)水、含(han)酚廢(fei)水、含(han)鉻廢(fei)水、含(han)有機磷廢(fei)水和放射性(xing)廢(fei)水等。
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