馬泉智1’2，向連城1，宋永會(huì)h，馮傳平2，錢鋒1
1．中國(guó)環(huán)境科學(xué)研究院城市水環(huán)境科技創(chuàng)新基地，北京100012  2．中國(guó)地質(zhì)大學(xué)(北京)水資源與環(huán)境學(xué)院，北京100083

摘要：分別選用無(wú)機(jī)絮凝劑聚合氯化鋁(PAC)、硫酸鐵(Fe2(SO4)3有機(jī)絮凝劑非離子聚丙烯酰胺(PAM)、陰離子聚丙烯酰胺(APAM)、陽(yáng)離子聚丙烯酰胺(CPAM)對(duì)畜禽糞便沼液進(jìn)行預(yù)處理，考察各物質(zhì)投加量對(duì)懸浮物(ss)的去除效果。結(jié)果表明，CPAM對(duì)ss的去除效果最好，當(dāng)沼液中的ss濃度為13 500 mg／L時(shí)，投加1．02 g／L(210 mL)的CPAM絮凝后，沼液中的ss濃度降為148 mg／L，SS去除率達(dá)98．9％。對(duì)絮凝后的水樣(PO43--P濃度為35 mg／L左右)進(jìn)行磷酸銨鎂(MAP)結(jié)晶處理，結(jié)果發(fā)現(xiàn)，當(dāng)Mg與P摩爾比為1：l，pH為9．5時(shí)PO43--P去除率最高；而當(dāng)Mg與P摩爾比為1．5～2：1，pH為10．0時(shí)PO43--P去除率最高。掃描電鏡(SEM)和x一射線衍射(XRD)分析表明，結(jié)晶產(chǎn)物為MAP。
    關(guān)鍵詞：畜禽糞便沼液；絮凝；磷回收；磷酸銨鎂(MAP)
    中圖分類號(hào)：X703．1 文獻(xiàn)標(biāo)識(shí)碼：A doi：10．3969／j．issn．1674-991X．2013．03．033

Technology Development of Flocculating Pretreatment of Livestock andPoultry Manure Slurry and of Phosphorus Recovery by MAP Crystallization
    MA Quan．zhil’2，XIANG Lian．cheng’，SONG Yong．huil，F(xiàn)ENG Chuan—pin92，QIAN Fen91
    1．Innovation Base of Urban Water Environmental Research，Chinese Research Academy of Environmental Sciences，Beijing 100012，China2．School of Water Resources and Environment，China University of Geoscienees Beijing，Beijing 100083，China
    Abstract：Flocculation was applied to the pretreatment of livestock and poultry manure fermenting slurry．Inorganic flocculants such as aluminium polychloride(PAC)and ferric sulfate(Fe2(S04)3)，organic flocculants such as nonionic polyacrylamide(PAM)，anionic polyaerylamide(APAM)and polyaerylamide(CPAM)were tested to remove suspended solid(SS)from the liquor．The results showed that CPAM was more efficient for SS removal than other flocculants．At SS of 13 500 mg／L，a CPAM dosage of 1．02 g／L could lower the SS to 148 mg／L，reaching a removal efficiency of 98．9％．After the flocculating pretreatment，the P043。一P concentration was around 35 mg／L，and magnesium ammonium phosphate(MAP)crystallization process was used to recover phosphorus．It showed that at Mg：P molar ratio of 1：1，the optimum pH was 9．5，at which the phosphate removal efficiency Was the highest；while at Mg：P molar ratios of 1．5-2：1，the optimum pH was 10．0．Scanning electron microscope (SEM)and X-ray diffraction(XRD)were employed to detect and analyze the crystallized product，and it showedthat the product was MAP．
    Key words：livestock and poultry manure fermenting slurry；flocculation；phosphorus recovery；magnesiumammonium phosphate(MAP)

我國(guó)畜禽養(yǎng)殖業(yè)發(fā)展迅猛，集約化、規(guī)�；�發(fā)展程度越來(lái)越大，畜禽養(yǎng)殖業(yè)大發(fā)展所帶來(lái)的環(huán)境污染問(wèn)題日益嚴(yán)重…。未經(jīng)處理的畜禽糞便和廢水直接排入環(huán)境，會(huì)對(duì)地表水、地下水、土壤和空氣造成嚴(yán)重的污染，特別是糞便中的氮、磷會(huì)造成水體的富營(yíng)養(yǎng)化。目前養(yǎng)殖廢水普遍采用的處理技術(shù)為厭氧發(fā)酵產(chǎn)沼氣處理工藝，畜禽糞便經(jīng)過(guò)厭氧發(fā)酵后仍然含高濃度有機(jī)污染物、氨氮和磷。

畜禽糞便沼液絮凝預(yù)處理及MAP法磷回收技術(shù)