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高氨氮豬場(chǎng)廢水的亞硝酸型脫氮研究
摘要： 豬場(chǎng)廢水脫氮處理前一般要經(jīng)過厭氧消化處理,完全厭氧消化能去除廢水中大部分有機(jī)物,但這同時(shí)降低了廢水中的COD/NH+4-N(1～3).根據(jù)厭氧消化四階段理論,控制厭氧消化到水解或產(chǎn)乙酸階段,使廢水中的COD/NH+4-N維持在較高的水平(7～10).為后續(xù)脫氮處理創(chuàng)造條件.本實(shí)驗(yàn)對(duì)比分析了運(yùn)用缺氧/好氧SBR工藝處理這兩種COD/NH+4-N不同的廢水的脫氮效果,實(shí)驗(yàn)結(jié)果表明:兩者的脫氮過程都是通過短程硝化反硝化實(shí)現(xiàn)的,反應(yīng)器中的NH+4-N濃度和pH值是控制亞硝酸型硝化的重要因素,經(jīng)過部分厭氧消化的廢水由于保持了較高的COD/NH+4-N脫氮效果明顯好于完全厭氧消化廢水,NH+4-N去除率達(dá)到98%以上,但出水反硝化不完全,投加乙酸鈉后出水NO+4-N減少到10-20mg/L,投加量以275mg/L為宜. Abstract： Anaerobic digestion is commonly used to remove the organic matter from the piggery wastewater.Complete digestion can remove most of the organic matters in the wastewater,but this can also lower the COD/NH+4-N ratio(1 ～ 3).Based on the theory of two-step digestion,we can keep high COD/NH+4-N ratio(7 ～ 10)in the wastewater by stopping the digestion at the step of hydrolysis,which benefits the denitrification later.Anoxic/Aerobic SBR was used to treat these two kinds of wastewater.In the experiment nitrite nitrification/denitrification was found.The study results indicated that COD/NH+4-N ratio was an important factor for nitrogen removal.And the nitrogen removal of partly digested wastewater was more efficacious than that of the completely digested wastewater.Further more the effluent COD concentration was also lower. 作 者： 楊朝暉 高鋒 曾光明 謝更新 李晨 作者單位： 湖南大學(xué)環(huán)境科學(xué)與工程系,湖南,長(zhǎng)沙,410082 期 刊： 應(yīng)用基礎(chǔ)與工程科學(xué)學(xué)報(bào) ISTICEI Journal： JOURNAL OF BASIC SCIENCE AND ENGINEERING 年，卷(期)： 2004, 12(2) 分類號(hào)： X703.1 關(guān)鍵詞： 短程硝化反硝化 缺氧/好氧SBR 豬場(chǎng)廢水 消化 Keywords： nitrite nitrification/denitrification Anoxic/Aerobic SBR piggery wastewater digest【高氨氮豬場(chǎng)廢水的亞硝酸型脫氮研究】相關(guān)文章：
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