本文關(guān)鍵詞：水力停留時間對分置式厭氧膜生物反應(yīng)器污泥混合液性質(zhì)和膜污染的影響研究　出處：《西安建筑科技大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 厭氧膜生物反應(yīng)器 啤酒廢水 水力停留時間 污泥混合液性質(zhì) 膜污染

【摘要】：厭氧膜生物反應(yīng)器(Anaerobic Membrane Bioreactor,AnMBR)是將厭氧生物處理技術(shù)與膜分離技術(shù)有效結(jié)合的一種新型、高效、穩(wěn)定的污水處理工藝,實(shí)現(xiàn)了水力停留時間(HRT)和污泥停留時間(SRT)的完全分離,具有甲烷轉(zhuǎn)化率高、污泥齡長、污泥產(chǎn)率低、污泥濃度高、耐沖擊負(fù)荷強(qiáng)、占地面積小、工藝設(shè)備集中以及易于自動化控制等特點(diǎn),是極具潛力的厭氧處理技術(shù)。目前,隨著厭氧生物處理技術(shù)和膜分離技術(shù)的日益成熟,已有一些學(xué)者針對分置式及一體式AnMBR的操作條件和膜污染狀況進(jìn)行研究,但仍未有一致的結(jié)論。本文以西安市漢斯啤酒廠廢水為小試分置式AnMBR進(jìn)水,探究該反應(yīng)器的最佳運(yùn)行工況及HRT對污泥混合液性質(zhì)和膜污染的影響,嘗試為通過控制HRT實(shí)現(xiàn)AnMBR工藝優(yōu)化和控制膜污染提供參考。主要研究成果如下:(1)在啟動階段,An MBR運(yùn)行良好。控制反應(yīng)器溫度在35±2℃,HRT為48 h,進(jìn)水COD濃度在1000~3000 mg/L的條件下,僅17天就完成了反應(yīng)器的啟動。系統(tǒng)對COD的去除率在83.33~96.94%之間,反應(yīng)器內(nèi)各項(xiàng)指標(biāo)均處于合理的范圍內(nèi)。但是系統(tǒng)基本不具備脫氮除磷效果。(2)在穩(wěn)定運(yùn)行階段,HRT為40 h時,有機(jī)負(fù)荷(OLR)為2.24 kgCOD/(m3·d),污泥負(fù)荷(F/M)為0.58 kgCOD/(kgMLVSS·d)的條件下,系統(tǒng)可以獲得較好的處理效果和較低的膜污染速率,確定此工況為最佳運(yùn)行條件。(3)HRT在40~16 h之間逐漸縮短時,產(chǎn)生較高的OLR和F/M,影響了厭氧微生物的代謝活動,使胞外聚合物(EPS)、微生物代謝產(chǎn)物(SMP)和污泥粒徑增加;EPS和SMP中的蛋白質(zhì)及污泥粒徑對泥餅層阻力(Rc)的影響較大,它們的增加促使膜面濾餅層形成,增加Rc,繼而增加膜過濾阻力(Rt),導(dǎo)致跨膜壓差(TMP)快速增長,加快了膜污染的進(jìn)程。(4)HRT對厭氧膜生物反應(yīng)器污泥混合液性質(zhì)和膜污染進(jìn)程有著重要的影響,通過優(yōu)化HRT可以便于保障處理效果和控制膜污染。
[Abstract]:Anaerobic Membrane Bioreactor. AnMBR is a new efficient and stable wastewater treatment process which combines anaerobic biological treatment technology with membrane separation technology. The complete separation of HRT (HRT) and SRT (sludge retention time) was realized, with high methane conversion, long sludge age, low sludge yield, high sludge concentration and strong shock resistance. With the advantages of small area, centralized process equipment and easy automatic control, it is a potential anaerobic treatment technology. At present, with the development of anaerobic biological treatment technology and membrane separation technology, the technology of anaerobic biological treatment and membrane separation is becoming more and more mature. Some scholars have studied the operating conditions and membrane fouling of split and integrated AnMBR. However, there is still no consistent conclusion. In this paper, the wastewater from Hans brewery in Xi'an City was used as the inlet water of separate AnMBR to investigate the optimal operation condition of the reactor and the effect of HRT on the properties of sludge mixture and membrane fouling. This paper attempts to provide a reference for AnMBR process optimization and membrane fouling control by controlling HRT. The main research results are as follows: 1) in the start-up stage. An MBR was operated well under the conditions of controlling the reactor temperature at 35 鹵2 鈩，

本文編號：1419542