本文選題：膜生物反應(yīng)器 + 進(jìn)水水質(zhì)��； 參考：《哈爾濱工業(yè)大學(xué)》2015年碩士論文

【摘要】：由于膜生物反應(yīng)器相比于其他污水處理工藝有很多優(yōu)點(diǎn),近年來關(guān)于膜生物反應(yīng)器的應(yīng)用得到很大推廣,然而在實(shí)際工程應(yīng)用中膜生物反應(yīng)器出現(xiàn)了很多問題,其中由于反應(yīng)器長(zhǎng)時(shí)間運(yùn)行產(chǎn)生的膜污染問題尤其嚴(yán)重。本實(shí)驗(yàn)從膜污染問題出發(fā),在其他研究成果基礎(chǔ)上,利用三組完全相同的膜生物反應(yīng)器重點(diǎn)研究了進(jìn)水水質(zhì)和運(yùn)行條件對(duì)膜污染的影響。在其他條件完全相同的情況下,向三組膜生物反應(yīng)器A.B.C中分別加入硝化出水,普通生活污水,普通生活污水+垃圾滲濾液水,三組反應(yīng)器連續(xù)運(yùn)行60天后發(fā)現(xiàn),膜生物反應(yīng)器對(duì)于水質(zhì)的處理效果有很大的區(qū)別,從對(duì)COD的去除效果來看,三組膜生物反應(yīng)器均能實(shí)現(xiàn)出水COD一級(jí)A標(biāo)準(zhǔn),但是只有膜生物反應(yīng)器B對(duì)COD的去除效果達(dá)到90%以上,從氨氮的去除效果來看,膜生物反應(yīng)器A對(duì)氨氮去除率能達(dá)到90%以上,且出水氨氮能達(dá)到一級(jí)A標(biāo)準(zhǔn),膜生物反應(yīng)B和C對(duì)氨氮去除效果在75%上下浮動(dòng),出水氨氮不能達(dá)一級(jí)A標(biāo)準(zhǔn),對(duì)于總氮和總磷的去除,三組反應(yīng)器均沒有明顯的處理效果。從膜污染方面考慮,跨膜壓差的增長(zhǎng)速率是膜生物反應(yīng)器CBA,同時(shí)SMP的含量分別是:C,33mg/l,B,15mg/l,A,10mg/l,EPS的含量分別是C,65mg/l,B,25mg/l,A,10mg/l。進(jìn)一步證明了SMP,EPS和膜污染存在很大的相關(guān)性。實(shí)驗(yàn)通過對(duì)比上清液和膜出水中的SMP發(fā)現(xiàn),出水SMP中的蛋白質(zhì)明顯小于上清液中的蛋白質(zhì)含量,說明蛋白質(zhì)在經(jīng)過膜組件時(shí)被膜系統(tǒng)截留,進(jìn)而會(huì)產(chǎn)生膜污染。實(shí)驗(yàn)還研究了運(yùn)行條件對(duì)膜污染的影響,通過向反應(yīng)器中投加鐵鹽和鋁鹽研究了化學(xué)藥劑對(duì)除磷效果和膜污染的影響,從本實(shí)驗(yàn)研究成果來看,推薦使用鐵鹽作為最佳除磷藥劑,鐵鹽的最佳投藥量是25mg/l,從膜污染情況來看,投加鋁鹽時(shí)膜污染速率是0.067kpa/d,投加鐵鹽時(shí)膜污染速率是0.8kpa/d,從SMP來看,鋁鹽的加入使得溶解性微生物產(chǎn)物的含量從7.5mg/l下降到5.0mg/l,而鐵鹽的加入使得溶解性微生物產(chǎn)物的含量從7.0mg/l下降到5.2mg/l�；瘜W(xué)藥劑對(duì)SMP的降低主要是通過降低SMP中的多糖含量來實(shí)現(xiàn)。通過研究曝氣強(qiáng)度和污泥齡對(duì)膜污染的影響發(fā)現(xiàn),根據(jù)反應(yīng)器的運(yùn)行條件,膜生物反應(yīng)器存在最佳的曝氣強(qiáng)度和最佳污泥齡,對(duì)于本實(shí)驗(yàn)而言,膜生物反應(yīng)器的最佳曝氣強(qiáng)度是0.06m3/h,最佳污泥齡是30天.通過一年的實(shí)驗(yàn)研究得出,SMP和EPS與膜污染有很大的關(guān)系,進(jìn)水水質(zhì)對(duì)膜污染影響嚴(yán)重。通過研究鐵鹽和鋁鹽對(duì)膜污染的影響發(fā)現(xiàn),鐵鹽和鋁鹽均能使膜污染速率降低,同時(shí)得出相對(duì)于不同的反應(yīng)器運(yùn)行條件MBR裝置存在一個(gè)最佳的曝氣強(qiáng)度和污泥齡。
[Abstract]:Because membrane bioreactor has many advantages compared with other wastewater treatment processes, the application of membrane bioreactor has been popularized in recent years. However, there are many problems in the practical application of membrane bioreactor. The membrane fouling caused by long-time operation of the reactor is especially serious. On the basis of other research results, three groups of identical membrane bioreactors were used to study the effects of influent water quality and operation conditions on membrane fouling. Under the same conditions, three groups of membrane bioreactor A.B.C were respectively added nitrified effluent, ordinary domestic sewage leachate water. After 60 days of continuous operation of the three groups of reactors, it was found that, The treatment effect of membrane bioreactor on water quality is very different. According to the removal effect of COD, all three groups of membrane bioreactor can achieve the first class A standard of effluent COD. However, only membrane bioreactor B has more than 90% COD removal efficiency. In view of ammonia nitrogen removal efficiency, membrane bioreactor A can remove more than 90% ammonia nitrogen, and effluent ammonia nitrogen can reach first class A standard. The removal efficiency of ammonia nitrogen by membrane biological reaction B and C was about 75%, and the ammonia nitrogen in effluent could not reach the first class A standard. The removal of total nitrogen and total phosphorus in the three groups of reactors had no obvious effect. Considering membrane fouling, the growth rate of transmembrane pressure difference is CBA, and the content of SMP is 15 mg / L 10 mg / L EPS, respectively. It is further proved that there is a great correlation between SMPP EPS and membrane fouling. By comparing the SMP in the supernatant and the effluent, it was found that the protein content in the effluent SMP was obviously lower than that in the supernatant, which indicated that the protein was intercepted by the membrane system when it passed through the membrane module, and then membrane fouling was produced. The effects of operation conditions on membrane fouling were also studied. The effects of chemical agents on phosphorus removal and membrane fouling were studied by adding iron salt and aluminum salt into the reactor. Iron salt is recommended as the best phosphorus removal agent. The best dosage of iron salt is 25 mg / l. According to the condition of membrane fouling, the membrane fouling rate is 0.067 kpa / d when aluminum salt is added, and 0.8 kpa / d when iron salt is added. From the view of SMP, The content of soluble microbial products decreased from 7.5mg/l to 5.0 mg / L with the addition of aluminum salt, while the content of dissolved microbial products decreased from 7.0mg/l to 5.2 mg / l with the addition of iron salt. The decrease of SMP by chemical agents is mainly achieved by reducing the content of polysaccharides in SMP. By studying the effects of aeration intensity and sludge age on membrane fouling, it is found that the membrane bioreactor has the best aeration intensity and the best sludge age according to the operating conditions of the reactor. The optimum aeration intensity of membrane bioreactor is 0.06 m3 / h and the optimum sludge age is 30 days. Through one year's experimental study, it is concluded that SMP and EPS have a great relationship with membrane fouling, and the influent water quality has a serious influence on membrane fouling. By studying the effect of iron salt and aluminum salt on membrane fouling, it is found that both iron salt and aluminum salt can reduce the membrane fouling rate, and at the same time, the optimum aeration intensity and sludge age of MBR plant under different operating conditions are obtained.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：X703.3

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本文編號(hào)：2077073