每一次的循(xun)環再(zai)利用，不僅是(shi)對自然(ran)資(zi)源的一種保護(hu)，也是(shi)為減少浪費。在再(zai)生(sheng)水(shui)成(cheng)為“第二(er)水(shui)源”的成(cheng)功實踐推動下，相信各類廢(fei)棄(qi)物也有(you)望再(zai)次“上(shang)架”，成(cheng)為日常生(sheng)產生(sheng)活所需的“第二(er)資(zi)源”，無(wu)論(lun)是(shi)破磚頭(tou)還是(shi)舊電池(chi)，也不管是(shi)牛奶包裝還是(shi)廢(fei)棄(qi)手機。

再(zai)(zai)生水(shui)水(shui)量大、水(shui)質(zhi)穩定、受季節和氣候影響小，就所可取，是一(yi)種(zhong)十分寶貴(gui)的(de)水(shui)資源(yuan)。再(zai)(zai)生水(shui)使(shi)用(yong)(yong)方式很(hen)多(duo)，按(an)與(yu)(yu)用(yong)(yong)戶的(de)關系可分為(wei)直(zhi)接使(shi)用(yong)(yong)與(yu)(yu)間接使(shi)用(yong)(yong)，直(zhi)接使(shi)用(yong)(yong)又可以分為(wei)就地使(shi)用(yong)(yong)與(yu)(yu)集中使(shi)用(yong)(yong)。再(zai)(zai)生水(shui)的(de)用(yong)(yong)途(tu)也很(hen)多(duo)，可以用(yong)(yong)于農田灌溉(gai)、園林綠(lv)化（公園、校園、高速公路(lu)綠(lv)帶、高爾(er)夫球場、公墓、綠(lv)帶和住宅區等(deng)）、工(gong)業（冷卻(que)水(shui)、鍋爐水(shui)工(gong)藝(yi)用(yong)(yong)水(shui)）、大型建筑沖洗以及游(you)樂(le)與(yu)(yu)環境（改善湖泊、池塘、沼澤地，增大河水(shui)流(liu)量和魚類養殖等(deng)），還有消防、空調和水(shui)沖廁等(deng)市(shi)政(zheng)雜用(yong)(yong)。

目前，多數國家(jia)的(de)(de)再(zai)(zai)(zai)生(sheng)(sheng)(sheng)水(shui)(shui)(shui)(shui)主(zhu)要(yao)用(yong)(yong)(yong)(yong)(yong)(yong)(yong)于(yu)農田(tian)灌溉，以(yi)間接(jie)使(shi)(shi)(shi)(shi)(shi)(shi)用(yong)(yong)(yong)(yong)(yong)(yong)(yong)為(wei)主(zhu)；日(ri)本(ben)等(deng)少數國家(jia)的(de)(de)再(zai)(zai)(zai)生(sheng)(sheng)(sheng)水(shui)(shui)(shui)(shui)則主(zhu)要(yao)用(yong)(yong)(yong)(yong)(yong)(yong)(yong)于(yu)城(cheng)(cheng)市(shi)非飲用(yong)(yong)(yong)(yong)(yong)(yong)(yong)水(shui)(shui)(shui)(shui)，以(yi)就地使(shi)(shi)(shi)(shi)(shi)(shi)用(yong)(yong)(yong)(yong)(yong)(yong)(yong)為(wei)主(zhu)；新趨勢是用(yong)(yong)(yong)(yong)(yong)(yong)(yong)于(yu)城(cheng)(cheng)市(shi)環境“水(shui)(shui)(shui)(shui)景(jing)觀”的(de)(de)環境用(yong)(yong)(yong)(yong)(yong)(yong)(yong)水(shui)(shui)(shui)(shui)。依據(ju)水(shui)(shui)(shui)(shui)的(de)(de)再(zai)(zai)(zai)生(sheng)(sheng)(sheng)使(shi)(shi)(shi)(shi)(shi)(shi)用(yong)(yong)(yong)(yong)(yong)(yong)(yong)的(de)(de)規律(lv)性、我(wo)國污水(shui)(shui)(shui)(shui)再(zai)(zai)(zai)生(sheng)(sheng)(sheng)利(li)用(yong)(yong)(yong)(yong)(yong)(yong)(yong)的(de)(de)重要(yao)性、再(zai)(zai)(zai)生(sheng)(sheng)(sheng)水(shui)(shui)(shui)(shui)使(shi)(shi)(shi)(shi)(shi)(shi)用(yong)(yong)(yong)(yong)(yong)(yong)(yong)的(de)(de)經濟性和(he)價格的(de)(de)合(he)(he)理性，我(wo)們認(ren)為(wei)，我(wo)國現(xian)階(jie)段(duan)再(zai)(zai)(zai)生(sheng)(sheng)(sheng)水(shui)(shui)(shui)(shui)使(shi)(shi)(shi)(shi)(shi)(shi)用(yong)(yong)(yong)(yong)(yong)(yong)(yong)政策(ce)應(ying)是：再(zai)(zai)(zai)生(sheng)(sheng)(sheng)水(shui)(shui)(shui)(shui)的(de)(de)使(shi)(shi)(shi)(shi)(shi)(shi)用(yong)(yong)(yong)(yong)(yong)(yong)(yong)方式，直(zhi)(zhi)接(jie)使(shi)(shi)(shi)(shi)(shi)(shi)用(yong)(yong)(yong)(yong)(yong)(yong)(yong)與間接(jie)使(shi)(shi)(shi)(shi)(shi)(shi)用(yong)(yong)(yong)(yong)(yong)(yong)(yong)相結合(he)(he)，因(yin)地制宜(yi)；直(zhi)(zhi)接(jie)使(shi)(shi)(shi)(shi)(shi)(shi)用(yong)(yong)(yong)(yong)(yong)(yong)(yong)中，就地使(shi)(shi)(shi)(shi)(shi)(shi)用(yong)(yong)(yong)(yong)(yong)(yong)(yong)與集中使(shi)(shi)(shi)(shi)(shi)(shi)用(yong)(yong)(yong)(yong)(yong)(yong)(yong)相結合(he)(he)，因(yin)時制宜(yi)。再(zai)(zai)(zai)生(sheng)(sheng)(sheng)水(shui)(shui)(shui)(shui)的(de)(de)使(shi)(shi)(shi)(shi)(shi)(shi)用(yong)(yong)(yong)(yong)(yong)(yong)(yong)范(fan)圍，城(cheng)(cheng)市(shi)使(shi)(shi)(shi)(shi)(shi)(shi)用(yong)(yong)(yong)(yong)(yong)(yong)(yong)與農村(cun)使(shi)(shi)(shi)(shi)(shi)(shi)用(yong)(yong)(yong)(yong)(yong)(yong)(yong)相結合(he)(he)，以(yi)城(cheng)(cheng)市(shi)為(wei)先(xian)；城(cheng)(cheng)市(shi)使(shi)(shi)(shi)(shi)(shi)(shi)用(yong)(yong)(yong)(yong)(yong)(yong)(yong)中，工(gong)業(ye)使(shi)(shi)(shi)(shi)(shi)(shi)用(yong)(yong)(yong)(yong)(yong)(yong)(yong)與其他使(shi)(shi)(shi)(shi)(shi)(shi)用(yong)(yong)(yong)(yong)(yong)(yong)(yong)相結合(he)(he)，以(yi)工(gong)業(ye)使(shi)(shi)(shi)(shi)(shi)(shi)用(yong)(yong)(yong)(yong)(yong)(yong)(yong)為(wei)先(xian)；從持續發展的(de)(de)觀點看，再(zai)(zai)(zai)生(sheng)(sheng)(sheng)水(shui)(shui)(shui)(shui)應(ying)主(zhu)要(yao)用(yong)(yong)(yong)(yong)(yong)(yong)(yong)于(yu)地下(xia)水(shui)(shui)(shui)(shui)回(hui)灌。

水(shui)是人(ren)類(lei)生(sheng)(sheng)產和(he)生(sheng)(sheng)活(huo)不(bu)(bu)可缺少的(de)(de)自(zi)然資源，是生(sheng)(sheng)物賴以生(sheng)(sheng)存的(de)(de)環境資源，也(ye)是戰略性經濟資源。長(chang)期以來，人(ren)們按“開采—使用(yong)—排(pai)放”的(de)(de)方式(shi)使用(yong)水(shui)資源。當經濟和(he)社會不(bu)(bu)發達時，排(pai)入水(shui)體(ti)(ti)的(de)(de)總污染量較小，能被水(shui)體(ti)(ti)所稀釋自(zi)凈(jing)，使人(ren)們產生(sheng)(sheng)了水(shui)有用(yong)之不(bu)(bu)盡的(de)(de)錯(cuo)覺(jue)。但隨著人(ren)口的(de)(de)不(bu)(bu)斷(duan)增(zeng)加，工農業的(de)(de)迅速(su)發展，人(ren)民生(sheng)(sheng)活(huo)水(shui)平的(de)(de)逐步提高，對水(shui)的(de)(de)需要量與日俱(ju)增(zeng)，相應(ying)的(de)(de)城市污水(shui)的(de)(de)排(pai)放量也(ye)相應(ying)增(zeng)加，加上水(shui)資源的(de)(de)分(fen)布不(bu)(bu)均和(he)周期性干旱，使水(shui)資源緊缺和(he)水(shui)環境污染成為全世界的(de)(de)主要危機(ji)。

再生水(shui)(shui)(shui)(shui)是(shi)(shi)以城市污(wu)(wu)水(shui)(shui)(shui)(shui)為原水(shui)(shui)(shui)(shui)，通過人為處(chu)理而恢(hui)復其使用價值，成為可使用的(de)(de)水(shui)(shui)(shui)(shui)資(zi)源。再生水(shui)(shui)(shui)(shui)的(de)(de)水(shui)(shui)(shui)(shui)量和水(shui)(shui)(shui)(shui)質(zhi)取決(jue)于(yu)污(wu)(wu)水(shui)(shui)(shui)(shui)的(de)(de)再生能力(li)（即污(wu)(wu)水(shui)(shui)(shui)(shui)的(de)(de)社會(hui)(hui)再生能力(li)），也就是(shi)(shi)取決(jue)于(yu)社會(hui)(hui)經濟(ji)實力(li)和科學技(ji)術(shu)發展水(shui)(shui)(shui)(shui)平，是(shi)(shi)社會(hui)(hui)經濟(ji)投入的(de)(de)函數(shu)。因可再生的(de)(de)污(wu)(wu)水(shui)(shui)(shui)(shui)量是(shi)(shi)有限的(de)(de)，污(wu)(wu)水(shui)(shui)(shui)(shui)再生利用的(de)(de)社會(hui)(hui)能力(li)也是(shi)(shi)有限的(de)(de)。

上(shang)海泵(beng)業推薦產品(pin)：污(wu)水提(ti)升設備、污(wu)水提(ti)升器、潛污(wu)泵(beng)、排污(wu)泵(beng)