描述
近年來在城市污水處理的工藝中,投資少、運行靈活的SBR處理工藝得到廣泛的應(yīng)用。SBR(Sequencing Batch Reactor Activated Sludge Process)序批式活性污泥工藝早在1904年就被開發(fā),并取得了較好的效果,只是由于當(dāng)時的自動化水平和設(shè)備制造工藝的限制,所以沒有得到推廣應(yīng)用。而近年來隨著自動化技術(shù)及在線監(jiān)測技術(shù)的飛速發(fā)展,為SBR工藝的發(fā)展和應(yīng)用提供了前提條件,因為對污水處理工藝進行自動化監(jiān)測和實時控制是提高污水處理效率、降低處理能耗的關(guān)鍵,所以SBR工藝也是各種污水處理工藝中對自動化系統(tǒng)要求較高的一種工藝。SBR反應(yīng)過程主要是在生物反應(yīng)池內(nèi)進行的,該工藝主要由進水、曝氣、沉淀、排水和閑置等五個階段組成。SBR工藝的處理效果主要取決于其運行參數(shù),其中主要參數(shù)包括各反應(yīng)段時間以及曝氣強度。一般采用以PLC為核心的工藝過程自動監(jiān)控系統(tǒng),實時控制鼓風(fēng)機、水泵、電動閥等設(shè)備及各反應(yīng)段時間,使水質(zhì)達到國家規(guī)定的排放標(biāo)準(zhǔn)。
由此可見,SBR污水處理工藝是一個多參量(如液位、流量、壓力、生物指標(biāo)等)、多任務(wù)(如污水輸送、風(fēng)量控制、水泵的啟停等)、多設(shè)備(如格柵機、水泵、鼓風(fēng)機、閥門等)且具有隨機性、時變性和耦合性的復(fù)雜系統(tǒng)。因此,應(yīng)由穩(wěn)定可靠的數(shù)據(jù)信息交換網(wǎng)絡(luò)與綜合管理系統(tǒng)來進行自動化的管理,使之安全可靠地運行。
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