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id="kmucqge" class="prodetail_ms"> <strong>產(chǎn)品描述：</strong>活性聚丙烯酰胺廠家好氧顆粒污泥是微生物在特定環(huán)境下自發(fā)凝聚、增殖而形成的生物顆粒，具有結(jié)構(gòu)緊密、沉降性能好、耐沖擊能力強、能承受較高有機負(fù)荷的特點[1, 2]。顆粒污泥結(jié)構(gòu)的特殊性還表現(xiàn)在，它能夠在1個顆粒內(nèi)同時保持多種氧濃度環(huán)境與營養(yǎng)環(huán)境，顆粒*的氧濃度梯度為各種微生物提供良好的生長條件，因而具有多種代謝活性，具有同步脫氮除磷的能力 </div> <p><span>發(fā)布時間：</span>2020-02-25</p> <p><span>瀏覽次數(shù)：</span>830</p> <div id="02wgqwm" class="product_btn"> <a href="/order.html" class="probtn1" rel="nofollow">在線詢價</a> <a href="/contact.html" class="probtn2" rel="nofollow">聯(lián)系我們</a> </div> </div> </div> <div id="2ku0m0u" class="pro_list"> <div id="uyyigks" class="pro_con"> <div id="k0seoum" class="pro_gs"> <div id="0eak0yq" class="gs_tit"><h3>產(chǎn)品概述</h3></div> <div id="gyiwe02" class="gs_text"> <p><strong>活性聚丙烯酰胺廠家</strong></p><p>聚丙烯酰胺產(chǎn)品簡介：<br /> <br /> 聚丙烯酰胺(Polyscrylamide)簡稱PAM，分陽離子、陰離子型、非離子型、兩性離子型，分子量從400-2000萬之間，產(chǎn)品外觀為白色粉末，易溶于水，溫度超過120℃時易分解。<br /> 產(chǎn)品性能：聚丙烯酰胺分子中具有陽性基團(-CONH2)，能與分散于溶液中的懸浮粒子吸附和架橋，有著*的絮凝作用，因此廣泛用于水處理以及冶金、造紙、石油、化工、紡織、選礦等領(lǐng)域。PAM用作污水處理，對水中有機物去除效率高，用量少，沉降速度快，制水成本低，是其它絮凝劑無法替代的產(chǎn)品。<br /> </p><p>好氧顆粒污泥是微生物在特定環(huán)境下自發(fā)凝聚、增殖而形成的生物顆粒，具有結(jié)構(gòu)緊密、沉降性能好、耐沖擊能力強、能承受較高有機負(fù)荷的特點[1, 2]。顆粒污泥結(jié)構(gòu)的特殊性還表現(xiàn)在，它能夠在1個顆粒內(nèi)同時保持多種氧濃度環(huán)境與營養(yǎng)環(huán)境，顆粒*的氧濃度梯度為各種微生物提供良好的生長條件，因而具有多種代謝活性，具有同步脫氮除磷的能力[3]。同時其在處理高濃度有機廢水、難降解廢水、有毒廢水[4]以及吸附重金屬[5]等方面也具有*的優(yōu)勢。目前好氧顆粒污泥是污水處理領(lǐng)域的研究熱點之一，在大量理論研究基礎(chǔ)上，研究者進行了好氧顆粒污泥處理實際污(廢)水的小試和中試，并取得較好的處理效果[6]。</p><p>　　1 好氧顆粒污泥形成機制</p><p><strong>活性聚丙烯酰胺廠家</strong></p><p>　　顆粒污泥的形成過程因培養(yǎng)污泥的種類及研究方法的不同而有所差異，目前*的模型包括以下4個步驟：(1)在重力、擴散力、熱力學(xué)作用力(如布朗運動)、細菌自身運動和水力剪切力等作用下，發(fā)生細菌間的相互碰撞以及細菌與固體表面的黏附，得到zui初的顆粒晶核;(2)在生物作用力(如離子鍵、氫鍵、細胞膜粘連溶融等)、物理作用力(如疏水作用、表面張力、范德華力、吸附架橋等)和化學(xué)作用力等的作用下，細胞間或細胞與固體懸浮物之間的連接會更加穩(wěn)定，因而使碰撞得到的微生物聚集顆粒晶核保持穩(wěn)定并進一步形成微生物聚集體;(3)在微生物、微生物分泌胞外多聚物(EPS)、菌群的生長與優(yōu)勢競爭等作用下，生物聚集體內(nèi)的微生物持續(xù)重復(fù)生長、繁殖、聚集，逐漸形成初生顆粒污泥;(4)在水力剪切力的強化作用下，初生顆粒污泥形成穩(wěn)定的三維空間結(jié)構(gòu)。M. Y. Chen等[7, 8]在SBR中用含 500 mg/L苯酚的合成廢水成功培養(yǎng)出好氧顆粒污泥，通過多色熒光原位雜交技術(shù)，檢測了剛接種的新鮮污泥和培養(yǎng)成熟的顆粒污泥的內(nèi)部結(jié)構(gòu)。熒光染色和CLSM都表明，微生物自凝聚是顆粒污泥形成的zui初步驟。聚合在一起的微生物在附著點分泌EPS并增殖使污泥生長，zui終形成顆粒污泥。</p><p> 聚丙烯酰胺分為：陰離子型、陽離子型、非離子型和兩性離子型。<br /> 陰離子聚丙烯酰胺主要用于生活生產(chǎn)用水，工業(yè)和城市污水處理。亦適用于氧化鋁制備過程中赤泥的絮凝沉淀及泥液分離。陽離子聚丙烯酰胺分子量偏高，主要用于水懸濁液和懸濁物的絮凝沉淀，酸性和偏酸性溶液含有有機懸濁物時絮凝是很困難的。在這種情況下，陽離子型聚丙烯酰胺能有效的進行絮凝沉淀，顯示其突出的性能。使用形態(tài)為0.1-0.2%水溶液，必須用Ph≤7的水配制，配成稀溶液后極易水解。應(yīng)隨配隨用或在當(dāng)天用完，不宜長時間存放。</p><p>　　2 好氧顆粒污泥形成與穩(wěn)定的影響因素</p><p>　　2.1 水力剪切力</p><p>　　一般認(rèn)為水力剪切力由機械攪拌或上升水流、氣流產(chǎn)生的液體流、空氣流和固相粒子間的摩擦引起，該剪切力的強度與好氧污泥顆?；^程密切相關(guān)。在較低的水力剪切力下形成的顆粒污泥結(jié)構(gòu)松散多孔，粒徑較大，強度差;較高的水力剪切力作用下形成的顆粒污泥光滑穩(wěn)定，結(jié)構(gòu)密實，機械強度高;但過高的水力剪切力容易導(dǎo)致顆粒失穩(wěn)解體。劉玉玲等[9]在表面氣體上升流速為1.06~1.77 cm/s的條件下，成功培養(yǎng)出性能良好的好氧顆粒污泥，控制表面氣體流速升高到5.3~7.08 cm/s時，培養(yǎng)過程中出現(xiàn)絮狀—部分顆粒化—絮狀的污泥形態(tài)，污泥zui終解體。Yao Chen等[10]運行4組SBR反應(yīng)器培養(yǎng)好氧顆粒污泥，表面氣速分別為0.8、1.6、2.4、3.2 cm/s，結(jié)果顯示在表面氣速為2.4、3.2 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