本文選題：聚丙烯酰胺　切入點(diǎn)：降解　出處：《東北石油大學(xué)》2015年碩士論文

【摘要】：聚丙烯酰胺已廣泛應(yīng)用于三次采油,導(dǎo)致油田產(chǎn)出水聚合物含量超標(biāo),對(duì)油田環(huán)境造成污染,因而對(duì)聚丙烯酰胺污水進(jìn)行處理具有重要意義。生物法降解聚丙烯酰胺具有成本低、二次污染小等優(yōu)點(diǎn),得到了研究人員廣泛關(guān)注。本文采用一種嵌套循環(huán)生物膜法處理含聚污水,構(gòu)建了內(nèi)循環(huán)嵌套外循環(huán)的雙循環(huán)模式,使得廢水在空間上交替流經(jīng)缺氧環(huán)境和好氧環(huán)境,以實(shí)現(xiàn)聚丙烯酰胺廢水有機(jī)物和氮素的有效去除。本文根據(jù)載體應(yīng)具備的性質(zhì),選擇合適載體,確定載體投加量,啟動(dòng)嵌套循環(huán)生物膜反應(yīng)器。研究好氧區(qū)聚丙烯酰胺濃度和水力停留時(shí)間(HRT)對(duì)聚丙烯酰胺廢水中有機(jī)物去除效率的影響。通過(guò)向進(jìn)水中加入輔酶前體維生素B族生長(zhǎng)因子和葡萄糖、淀粉、蛋白胨等碳源和氮源強(qiáng)化嵌套循環(huán)生物膜法對(duì)聚丙烯酰胺的去除效能。探討嵌套循環(huán)模式、進(jìn)水方式和內(nèi)循環(huán)表觀氣速與脫氮效能內(nèi)在關(guān)系。對(duì)載體進(jìn)行生物相觀察,對(duì)聚丙烯酰胺降解菌進(jìn)行篩選,并初步研究金屬離子對(duì)聚丙烯酰胺降解菌降解特性的影響。此外,研究嵌套循環(huán)生物膜法水動(dòng)力學(xué),并測(cè)定嵌套循環(huán)生物膜法生物動(dòng)力學(xué)系數(shù)。研究結(jié)果表明,經(jīng)60天馴化后,平均COD去除率達(dá)到70.37%。馴化期間在聚丙烯酰胺濃度升高初期,COD去除率逐漸下降,HRT24h時(shí),COD去除率隨HRT增大而升高,HRT24h后COD去除率趨于平穩(wěn),確定最佳HRT為24h。提高載體濃度可增大生物量,COD去除效能提高,B族維生素對(duì)聚丙烯酰胺去除率影響較小,葡萄糖和淀粉可使去除率分別提高7%和6%,蛋白胨對(duì)去除率影響較大,去除率可從60%提高到75%。氮素去除實(shí)驗(yàn)表明,采用從缺氧區(qū)進(jìn)水方式,在內(nèi)循環(huán)表觀氣速為0.003mg/L條件下,嵌套循環(huán)脫氮效率較高,氨氮去除率為85%,總氮去除率為33.3%。鏡檢結(jié)果顯示好氧區(qū)載體生物膜生物相結(jié)構(gòu)穩(wěn)定,生物膜由大量絲狀菌和少量細(xì)菌組成。分離篩選出兩株為桿狀革蘭氏陰性菌的聚丙烯酰胺降解菌P1和P2,并且金屬離子Mg2+和Zn2+對(duì)菌種生長(zhǎng)和PAM降解有促進(jìn)作用,但Mn2+對(duì)P1和P2有一定程度抑制作用。動(dòng)力學(xué)研究結(jié)果表明,好氧區(qū)基質(zhì)可在1min內(nèi)完成混合,為連續(xù)流完全混合型,外循環(huán)曝氣量與氣含率之間成線性關(guān)系,擬合方程為y=10.725x-0.504,外循環(huán)氣含率與循環(huán)流速的平方成類(lèi)線性關(guān)系。選定氣提管頂部處為最佳進(jìn)水口位置,建立水動(dòng)力學(xué)模型,解得最小臨界氣速為Ugr=0.76m/s。實(shí)驗(yàn)測(cè)定嵌套循環(huán)好氧區(qū)顆粒生物膜產(chǎn)率系數(shù)為Y=0.40645(mg/m3)/(mg/L PAM)。
[Abstract]:Polyacrylamide has been widely used in the extraction of three times, to exceed the standard of oilfield produced water polymer content, oil pollution to the environment, so it is of great significance for processing wastewater. The degradation of polyacrylamide polyacrylamide biological method has the advantages of low cost, small two pollution and other advantages, has been widely concerned by researchers. In this paper, a nested loop biofilm treatment of wastewater containing polymer, constructed in the nested loop outer loop double loop mode, so that waste water flows through the alternating aerobic anoxic environment in the space environment, to achieve effective removal of polyacrylamide wastewater organic matter and nitrogen. According to the nature of support should have the appropriate carrier, determine the carrier dosage, start the nested loop biofilm reactor. The aerobic zone of polyacrylamide concentration and hydraulic retention time (HRT) on the removal efficiency of organic compounds in wastewater of polyacrylamide The effect by adding coenzyme precursor B vitamins and growth factors to influent glucose, starch, peptone and efficiency of carbon source and nitrogen source to strengthen the nested loop biofilm removal of polyacrylamide. To investigate the nested loop mode, feeding mode and the inner circulation of superficial gas velocity and the nitrogen removal efficiency of biological internal relations. Observation of the carrier phase, the polyacrylamide degrading bacteria were screened, and a preliminary study on the effect of metal ions on the degradation of polyacrylamide degrading bacteria. In addition, research on nested loop biofilm water dynamics, and the determination of the nested loop biofilm kinetic coefficient. The results show that after 60 days of acclimation, the average removal rate of COD reached 70.37%. during the period of acclimation increased in the early COD removal rate of polyacrylamide concentration, decreased HRT24h, the removal rate of COD with HRT increased, HRT24h removal rate of COD tends to be stable, determined The best HRT can increase the biomass of 24h. to improve the carrier concentration, COD removal efficiency increased, vitamin B has little effect on the removal rate of polyacrylamide, glucose and starch can improve the removal rate of 7% and 6% respectively, peptone had great influence on the removal rate, the removal rate can be increased from 60% to 75%. The nitrogen removal experiments showed that using from anoxic influent modes, including circulating superficial gas velocity is 0.003mg/L, nested loops for higher efficiency of nitrogen removal, ammonia nitrogen removal rate was 85%, total nitrogen removal rate of 33.3%. microscopy results showed that the aerobic zone carrier biofilm structure, biological membranes are composed of a large number of filamentous bacteria and a small amount of bacteria isolated. Two strains of rod-shaped gram negative bacteria polyacrylamide degrading bacteria P1 and P2, and the metal ions Mg2+ and Zn2+ have positive effects on the growth and PAM degradation, but Mn2+ has a certain degree of inhibition of P1 and P2 dynamics. The results of the study show that aerobic zone matrix mixing can be completed within 1min for continuous flow completely mixed, circulating aeration and gas holdup between the linear equation is y=10.725x-0.504, circulating gas holdup and circulation velocity as the square of linear relation. The selected stripping tube at the top for the best position of the water inlet the establishment of water, kinetic model, solution of minimum critical gas velocity determination of nested loop aerobic granular biofilm yield coefficient of Ugr=0.76m/s. experiment Y=0.40645 (mg/m3) / (mg/L PAM).

【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：X741

【相似文獻(xiàn)】

相關(guān)博士學(xué)位論文 前1條

1 夏軍;數(shù)據(jù)局部性及其編譯優(yōu)化技術(shù)研究[D];國(guó)防科學(xué)技術(shù)大學(xué);2004年

相關(guān)碩士學(xué)位論文 前2條

1 馬冬;嵌套循環(huán)生物膜法降解含聚污水研究[D];東北石油大學(xué);2015年

2 劉陶剛;基于可重構(gòu)平臺(tái)的軟硬件代碼劃分技術(shù)研究[D];解放軍信息工程大學(xué);2010年

，

本文編號(hào)：1725496