缺氧區(qū)好氧區(qū)容積比對a2o工藝反硝化除磷的影響-全文預(yù)覽
【正文】 , Barry Rabinowitz.Optimizing biological nutrient removal in anoxic zones[J]. WaterSciTechno,l 1999, 39 (6): 113118.[2] Bortone G, SaltarelliR,AlonsoV,et al. Biological anoxicphosphorus removal—the DEPHANOX process[J]. WaterSciTechno,l 1996, 34 (1): 119128.[3] Kuba T,Van LoosdrechtM CM,Heijnen J J. Phosphorusand nitrogen removal with minimal COD requirement byintegration of nitrification in a twosludge system [ J].WaterRes, 1996, 30(7): 17021710.[4] 王曉蓮,王淑瑩,彭永臻,等. A2O工藝中反硝化除磷及過量曝氣對生物除磷的影響[J].化工學(xué)報, 2005,56(8): 15651570.[5] APHA. Standard Methods for the Examination ofWaterand Wastewater [M ]. Washington: American PublicHealth Association, American Water Works AssociationandWaterEnvironmentFederation, 1992.[6] Yuan Zhiguo,Adrian Oehmen, Pernille Ingildsen. Controlof nitrate recirculation flow in predinitrification systems[J]. WaterSciTechno,l 2002, 45 (45): 2936.作者簡介:曹雪梅(1982 ), 女, 滿族, 遼寧開原人, 碩士研究生, 研究方向為污水脫氮除磷技術(shù)及其過程控制。③ 增加缺氧區(qū)與好氧區(qū)的容積比有利于降低曝氣能耗,減少運行費用,計算表明n為0. 60時的曝氣能耗要比n為0. 33時節(jié)省約15%。在3種容積比下A2/O系統(tǒng)的厭氧區(qū)平均出水COD濃度分別為661和60. 9 mg/L,平均COD去除率分別為82. 91%、83. 80%和84. 52%,而缺氧區(qū)對COD的平均去除率分別為5. 12%、6. 05%和7. 11%,且n值越大則缺氧區(qū)對COD的平均去除率越高,這是因為增加缺氧區(qū)的水力停留時間有利于反硝化反應(yīng)的進(jìn)行,進(jìn)而提高了對COD的去除率。2 試驗過程中,由于好氧段的溶解氧一直保持在2~3 mg/L,故未發(fā)生亞硝酸鹽積累,而且對氨氮的去除率幾乎達(dá)到10
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