改良UCT分段進水脫氮除磷工藝性能及物料平衡

摘要：采用改良UCT分段進水試驗裝置研究了該工藝處理實際生活廢水的脫氮除磷性能,建立了該系統(tǒng)碳(COD)、氮、磷的物料衡算公式,并以穩(wěn)態(tài)條件下試驗數(shù)據(jù)為基礎(chǔ)分析評價了各指標的物料分布情況.結(jié)果表明,工藝出水水質(zhì)穩(wěn)定,抗沖擊負荷能力較強,平均出水COD、總氮、總磷含量分別為43.5、8.51、0.29 mg·L~(-1),滿足國家城鎮(zhèn)生活污水一級A排放標準.此外,根據(jù)建立的物料衡算公式及工藝各反應區(qū)污染物指標的轉(zhuǎn)化途徑分析發(fā)現(xiàn),高達67.1%的反硝化脫氮作用(包括缺氧反硝化和好氧同步硝化反硝化)是該工藝深度脫氮的根本原因;系統(tǒng)反硝化和釋磷過程利用的COD占總?cè)コ�量�?2.1%,體現(xiàn)了該工藝充分利用原水碳源的優(yōu)勢;氮素和COD的平衡率均高達99.8%,證明了所建立的公式的有效性.系統(tǒng)對磷的去除主要依賴于排放的剩余污泥,占總量的71.7%.Abstract：The removal of wastewater nutrients in the modified UCT step feed process was investigated when treating municipal wastewater.Based on experimental data under steady-state conditions, the equations for calculating material balances of COD, nitrogen and phosphate were established.These three material distributions in the system were also evaluated.The results indicated that with stable effluent quality and good capacity of resistance to shock load, the effluent concentrations of COD,TN and TP were 43.5, 8.51, 0.29 mg·L~(-1) on average, respectively, which the first level A discharge standard of pollutants for municipal wastewater treatment plant was met.Furthermore, according to calculation equations and transformation pathways of nutrients, it was found that approximately 67.1% of nitrogen was successfully removed during the denitrification process, including anoxic denitrification process and simultaneous nitrification and denitrification (SND) process, which greatly contributed to high nitrogen removal efficiency.COD consumed in the denitrification and phosphate release process accounted for 62.1%, which embodied the advantage of sufficient utilization of influent carbon sources.Both nitrogen and COD balance ratios were as high as 99.8%, which confirmed the validity of equations established.Phosphate removal was mainly achieved by the discharge of excess sludge, accounting for 71.7% of the total. 作者： 葛士建[1]彭永臻[1]張亮[2]王希明[1]王淑瑩[1] Author： GE Shijian[1]  PENG Yongzhen[1]  ZHANG Liang[2]  WANG Ximing[1]  WANG Shuying[1] 作者單位： 北京工業(yè)大學北京市水質(zhì)科學與水環(huán)境恢復重點實驗室,北京,100124哈爾濱工業(yè)大學城市水資源與水環(huán)境國家重點實驗室,黑龍江,哈爾濱,150090 期 刊： 化工學報   ISTICEIPKU Journal： CIESC JOURNAL 年，卷(期)： 2010, 61(4) 分類號： X703.1 關(guān)鍵詞： 分段進水    脫氮除磷    UCT    物料平衡    Keywords： step feed    nitrogen and phosphate removal    UCT    material balance    機標分類號： X70 X79 機標關(guān)鍵詞： 改良    分段進水    脫氮除磷性能    工藝性能    物料平衡    step    material balance    simultaneous nitrification    同步硝化反硝化    COD    high nitrogen removal    wastewater treatment    phosphate release    experimental data    物料衡算    effluent quality    抗沖擊負荷能力    transformation    excess sludge    系統(tǒng) 基金項目： 國家重大科技專項課題，北京市教委科技創(chuàng)新平臺項目，中韓環(huán)境共同技術(shù)研究項目

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