城市污水二級(jí)硝化出水的離子交換脫氮除磷

摘要： 以城市污水二級(jí)硝化出水為原水,對(duì)比研究了3種強(qiáng)堿性陰離子交換樹(shù)脂(201×4、D296、D301T)動(dòng)態(tài)脫氮除磷情況,并以201×4樹(shù)脂為模式樹(shù)脂考察了樹(shù)脂活化方式(常規(guī)酸堿交替活化與NaCl再生液活化)、腐殖酸(HA)濃度(1.1,2.8和9.4 mg·l~(-1))對(duì)樹(shù)脂動(dòng)態(tài)脫氮除磷的影響.結(jié)果表明,3種樹(shù)脂都具有較好的脫氮除磷效果,達(dá)到TP穿透點(diǎn)(0.1 mg·l~(-1),去除率92%)時(shí),201×4樹(shù)脂具有最大的穿透體積(418 BV),但其對(duì)NO_3~--N的去除率(69%)明顯低于其它樹(shù)脂(97%-98%);3種樹(shù)脂對(duì)SO_4~(2-)和HA的去除率分別為97%-99%,71%-80%;常規(guī)酸堿活化使樹(shù)脂穿透體積較再生液活化僅提高了12%;超濾膜法和臭氧氧化法預(yù)處理對(duì)原水HA的去除率分別為27%和68%;原水HA濃度增加使樹(shù)脂穿透體積從28lBV降至239BV,同時(shí)NO_3~-去除率從80%上升至92%. Abstract： Simultaneous removal of nitrogen and phosphorous from municipal secondary nitrification effluent by ion exchange were investigated using 3 kinds of strong-base anion-exchange resins(201×4, D296, D301T)in a dynamic mode in a column reactor. Subsequently, the effects of resin activation methods (conventional acid-base alternate activation, NaCI regenerant activation), the concentration of humic acid(HA) (1.1, 2.8 and 9.4 mg· l~(-1)) on the dynamic adsorption performance of the 201 × 4 resin were also investigated. The following results were obtained: (1) All 3 resins showed excellent simultaneous phosphorus and nitrogen(nitrate) removal performance while 201 × 4 resin achieved the largest breakthrough volumes of 418 BV at a leakage level of 0.1 mg P ·l~(-1) and the lowest NO_3~--N removal efficiency(69%), and its SO_4~(2-) and HA removal amounted to 97%-99% and 71%-80% respectively. (2) The breakthrough volumes of 201 × 4 resin increased by only 12% using conventional acid-base alternate activation rather than NaC1 regenerant. (3) The HA removal efficiency were 27% and 68%, respectively when uhrafihration and ozonation were individually used as pretreatment procedure. With the increase in HA concentration in raw wastewater, breakthrough volumes decreased from 281BV to 239 BV and NO_3~--N removal efficiency increased from 80% to 92%. 作 者： 陳進(jìn)軍    王長(zhǎng)偉    韓蕙    鄭少奎    CHEN Jin-jun    WANG Chang-wei    HAN Hui    ZHENG Shao-kui   作者單位： 北京師范大學(xué)環(huán)境學(xué)院,水沙科學(xué)教育部重點(diǎn)實(shí)驗(yàn)室/水環(huán)境模擬國(guó)家重點(diǎn)實(shí)驗(yàn)室,北京,100875  期 刊： 環(huán)境化學(xué)  ISTICPKU   Journal： ENVIRONMENTAL CHEMISTRY  年，卷(期)： 2009, 28(6)  分類(lèi)號(hào)： X13  關(guān)鍵詞： 磷    離子交換    城市污水    氮.    Keywords： phosphorus    ion exchange    municipal sewage    nitrogen.   

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