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再生(sheng)水是(shi)一種十分(fen)寶貴(gui)的(de)(de)水資源，水量大(da)、水質穩定、受季節(jie)和氣候影響(xiang)也很(hen)小。再生(sheng)水的(de)(de)使用(yong)方(fang)式很(hen)多，可以(yi)分(fen)為(wei)(wei)(wei)直接(jie)使用(yong)與間接(jie)使用(yong)兩(liang)種，直接(jie)使用(yong)又可以(yi)分(fen)為(wei)(wei)(wei)就地(di)使用(yong)與集中使用(yong)兩(liang)類(lei)。多數國家(jia)的(de)(de)再生(sheng)水以(yi)間接(jie)使用(yong)為(wei)(wei)(wei)主，主要(yao)用(yong)于農田灌(guan)溉；日本等少數國家(jia)的(de)(de)再生(sheng)水則以(yi)就地(di)使用(yong)為(wei)(wei)(wei)主，主要(yao)用(yong)于城市非(fei)飲用(yong)水。用(yong)于城市環境“水景觀(guan)”的(de)(de)環境用(yong)水是(shi)新趨勢。

再(zai)生水的用(yong)(yong)(yong)(yong)(yong)(yong)(yong)(yong)途(tu)很多，可(ke)以用(yong)(yong)(yong)(yong)(yong)(yong)(yong)(yong)于農田灌(guan)(guan)溉，對(dui)(dui)公(gong)園、校園、高(gao)速公(gong)路(lu)綠帶(dai)、高(gao)爾夫球場(chang)、公(gong)墓(mu)、綠帶(dai)和(he)(he)(he)住宅區等進行綠化，可(ke)以作(zuo)為(wei)工(gong)(gong)業(ye)上的冷(leng)卻(que)水和(he)(he)(he)鍋爐水工(gong)(gong)藝用(yong)(yong)(yong)(yong)(yong)(yong)(yong)(yong)水，再(zai)生水還可(ke)以用(yong)(yong)(yong)(yong)(yong)(yong)(yong)(yong)于大型建筑沖(chong)洗以及(ji)改善(shan)湖泊、池塘、沼澤地(di)，增大河水流量和(he)(he)(he)魚類養殖(zhi)等，還有消防(fang)、空調和(he)(he)(he)水沖(chong)廁等市政雜(za)用(yong)(yong)(yong)(yong)(yong)(yong)(yong)(yong)。根據中水利用(yong)(yong)(yong)(yong)(yong)(yong)(yong)(yong)的用(yong)(yong)(yong)(yong)(yong)(yong)(yong)(yong)途(tu)，可(ke)分為(wei)地(di)下水回灌(guan)(guan)用(yong)(yong)(yong)(yong)(yong)(yong)(yong)(yong)水，工(gong)(gong)業(ye)用(yong)(yong)(yong)(yong)(yong)(yong)(yong)(yong)水，農、林(lin)(lin)、牧業(ye)用(yong)(yong)(yong)(yong)(yong)(yong)(yong)(yong)水，城市非飲(yin)用(yong)(yong)(yong)(yong)(yong)(yong)(yong)(yong)水，景觀環(huan)境用(yong)(yong)(yong)(yong)(yong)(yong)(yong)(yong)水等五(wu)類。再(zai)生水用(yong)(yong)(yong)(yong)(yong)(yong)(yong)(yong)于地(di)下水回灌(guan)(guan)，可(ke)對(dui)(dui)地(di)下水源進行補給，能(neng)夠防(fang)治海水入侵(qin)和(he)(he)(he)地(di)面下降；再(zai)生水用(yong)(yong)(yong)(yong)(yong)(yong)(yong)(yong)于工(gong)(gong)業(ye)可(ke)作(zuo)為(wei)冷(leng)卻(que)用(yong)(yong)(yong)(yong)(yong)(yong)(yong)(yong)水、洗滌用(yong)(yong)(yong)(yong)(yong)(yong)(yong)(yong)水和(he)(he)(he)鍋爐用(yong)(yong)(yong)(yong)(yong)(yong)(yong)(yong)水等方面；再(zai)生水用(yong)(yong)(yong)(yong)(yong)(yong)(yong)(yong)于農、林(lin)(lin)、牧業(ye)用(yong)(yong)(yong)(yong)(yong)(yong)(yong)(yong)水可(ke)作(zuo)為(wei)糧食作(zuo)物(wu)(wu)、經濟作(zuo)物(wu)(wu)的灌(guan)(guan)溉、種植(zhi)與育(yu)苗(miao)、林(lin)(lin)木、觀賞植(zhi)物(wu)(wu)的灌(guan)(guan)溉、種植(zhi)與育(yu)苗(miao)、家(jia)畜和(he)(he)(he)家(jia)禽(qin)用(yong)(yong)(yong)(yong)(yong)(yong)(yong)(yong)水。

再(zai)生水一般(ban)情(qing)況下只能用于以上情(qing)況，達不到飲用標準，是不能喝的。