本文關(guān)鍵詞： 混凝 浮選 CCDAF 吸附 泡絮碰撞黏附 溶氣氣浮　出處：《化工學(xué)報(bào)》2016年12期 　論文類型：期刊論文

【摘要】：針對(duì)傳統(tǒng)溶氣氣浮(DAF)工藝中氣泡對(duì)絮體顆粒捕集、黏附效率低,泡絮體黏附不穩(wěn)定等問題,基于泡絮碰撞黏附理論,研發(fā)了集逆向流與同向流于一體的DAF工藝(CCDAF)。該工藝溶氣水分兩次投加,接觸室分為碰撞接觸室和黏附接觸室。試驗(yàn)結(jié)果表明,CCDAF工藝顯著提高了泡絮黏附效率和泡絮體穩(wěn)定性,對(duì)濁度、藻類平均去除率達(dá)到96.4%、96.50%,出水顆粒物以2~7μm粒徑為主。工藝主要去除大分子、疏水性有機(jī)物,CODMn、UV254、DOC平均去除率分別達(dá)到37.6%、46.3%和32.11%,CCDAF比同向流及逆向流DAF除污染效能更加顯著。泡絮黏附機(jī)理分析表明,CCDAF工藝逆向流碰撞區(qū)主導(dǎo)作用機(jī)制為碰撞黏附及共聚作用,同向流接觸區(qū)為碰撞黏附及網(wǎng)捕、包卷和架橋作用。
[Abstract]:In view of the traditional dissolved air flotation (DAF) process of bubble floc particle trapping, the adhesion efficiency is low, the bubble floc attachment instability problems, based on the theory of bubble floc collision developed in adhesion, reverse flow with the same to the DAF technology integrates (CCDAF). The process of water soluble gas in two dosage the room is divided into contact, contact chamber and adhesion contact chamber. The test results show that CCDAF technology improved the efficiency and stability of foam foam floc adhesion, flocs of turbidity, algae 96.50% average removal rate reached 96.4%, and the effluent particles with 2~7 m diameter. The main process of removal of hydrophobic organic molecules. CODMn, UV254, DOC, the average removal rate reached 37.6%, 46.3% and 32.11%, CCDAF than the same flow and reverse flow DAF pollution removal efficiency is more significant. Analysis of foam floc adhesion mechanism showed that the CCDAF technology of reverse flow collision area leading mechanism for the collision of adhesion and copolymerization, the same direction The flow contact area is the effect of collision and adhesion and net capture, wrapping and bridging.

【作者單位】： 山東建筑大學(xué)市政與環(huán)境工程學(xué)院;山東省綠色建筑協(xié)同創(chuàng)新中心;山東省城市供排水水質(zhì)監(jiān)測(cè)中心;北京工業(yè)大學(xué)建筑工程學(xué)院北京市水質(zhì)科學(xué)與水環(huán)境恢復(fù)工程重點(diǎn)實(shí)驗(yàn)室;
【基金】：山東省科技發(fā)展計(jì)劃項(xiàng)目(2014GSF120003) 住房和城鄉(xiāng)建設(shè)部科學(xué)技術(shù)項(xiàng)目計(jì)劃項(xiàng)目(2014-K5-026) 山東省自然科學(xué)基金項(xiàng)目(ZR2016EEM32) 山東建筑大學(xué)博士基金項(xiàng)目(XNBS1511)~~
【分類號(hào)】：TU991.2
【正文快照】： 水環(huán)境恢復(fù)工程重點(diǎn)實(shí)驗(yàn)室,北京100124)引言在給水處理領(lǐng)域,溶氣氣浮工藝(dissolved airflotation,DAF)已廣泛應(yīng)用于高藻、微污染水及低溫低濁水的處理[1-3]。氣浮接觸區(qū)是微氣泡與絮體顆粒混合、碰撞、黏附的主要場(chǎng)所,其運(yùn)行效果好壞直接影響著氣浮凈水效果的優(yōu)劣[4-6]。傳統(tǒng)，

本文編號(hào)：1486943