本文選題：厭氧顆粒污泥 + 胞外聚合物　； 參考：《中國礦業(yè)大學》2017年碩士論文

【摘要】：厭氧技術在高濃度和難降解有機廢水的處理過程中有著重要的作用,厭氧污泥的顆�；菂捬醴磻鞲咝Ш头�(wěn)定運行的關鍵,但厭氧污泥顆�；俣嚷�,而成熟的厭氧顆粒污泥資源少,價格高。隨著其大規(guī)模的應用,研究經(jīng)濟且有效地厭氧顆粒污泥規(guī)模化培養(yǎng)技術,具有很強的實際意義和理論價值。本文以粒狀脫水污泥為最終接種污泥,主要研究了初始接種污泥種類和污泥脫水前不同物質的添加對厭氧顆粒污泥培養(yǎng)過程中顆粒穩(wěn)定性和活性的影響,并以中藥制藥廢水驗證了所培養(yǎng)顆粒的降解能力,需注意的是本研究中厭氧顆粒污泥不是由絮狀污泥或粒狀脫水污泥破碎后產(chǎn)生的絮狀污泥培養(yǎng)所得,而是由穩(wěn)定的粒狀脫水污泥直接轉化所得。首先研究了接種污泥種類對培養(yǎng)厭氧顆粒污泥的影響。所用三種接種污泥中,胞外聚合物(EPS)中的蛋白質(PN)/多糖(PS)比大小依次為厭氧污泥好氧污泥初步厭氧污泥,相應地PN/PS值越高的接種污泥所制備的顆粒穩(wěn)定性越高,而顆粒活性根據(jù)接種污泥表現(xiàn)為厭氧污泥初步厭氧污泥好氧污泥,且接種有厭氧污泥的顆粒,其COD去除率、產(chǎn)氣量和產(chǎn)氣中的CH4含量均顯著高于其它各組,但經(jīng)27d培養(yǎng)后顆�；钚在呌谝恢�,驗證了好氧性質的污泥作為接種污泥培養(yǎng)厭氧顆粒污泥的可行性。其次,研究了污泥脫水前不同物質的添加對培養(yǎng)厭氧顆粒污泥的影響。對于顆粒穩(wěn)定性提高方面:不在35℃下放置30min進一步降低粒狀脫水污泥含水率時,無機混凝劑和高離子度(50%)的陽離子聚丙烯酰胺(CPAM)可顯著提高顆粒穩(wěn)定性,而無機混凝中聚合氯化鋁(PAC)優(yōu)于聚合硫酸鐵(PFS)和聚合氯化鋁鐵(PAFC);在35℃下放置30min進一步降低粒狀脫水污泥含水率時,PAC無明顯效果,而CPAM可顯著提高顆粒穩(wěn)定性,分子量越大顆粒越穩(wěn)定,與離子度無明顯關系。對于顆�；钚蕴岣叻矫�:零件鐵(Fe0)可提高顆粒污泥的COD去除率和CH4含量,并促進EPS的分泌,單獨使用時對顆粒的穩(wěn)定性影響不大,但與PAC協(xié)同使用時對顆粒污泥穩(wěn)定性的促進作用優(yōu)于兩者單獨使用時;添加碳源能提高顆粒活性,但影響顆粒穩(wěn)定性,在100mg COD/g MLSS和200mg COD/g MLSS的添加量下,乙酸鈉對顆粒的穩(wěn)定性都起反效果,而淀粉表現(xiàn)為添加量少時可提高顆粒穩(wěn)定性,添加量多時損失量大于又添加乙酸鈉的。以粒狀脫水污泥培養(yǎng)厭氧顆粒污泥的過程中,顆粒內(nèi)部的EPS會經(jīng)歷先降低后上升的過程,最后變得多孔。培養(yǎng)過程中水力剪切力不能過低,150r/min條件下獲得的顆粒活性和穩(wěn)定性都不如165r/min培養(yǎng)的,且當厭氧瓶內(nèi)顆粒量過多時,因顆粒間的碰撞摩擦幾率變大顆粒損失量相應變多。此外,培養(yǎng)的顆粒污泥具有良好的儲存性,放置90d后仍有較好的活性和穩(wěn)定性。
[Abstract]:Anaerobic technology plays an important role in the treatment of high concentration and refractory organic wastewater. The granulation of anaerobic sludge is the key to the efficient and stable operation of anaerobic reactor, but the rate of anaerobic sludge granulation is slow. The mature anaerobic granular sludge resource is less and the price is high. With its large scale application, it is of great practical significance and theoretical value to study the scale culture technology of anaerobic granular sludge. In this paper, granular dewatered sludge was used as the final inoculation sludge. The effects of the types of initial inoculated sludge and the addition of different substances before sludge dewatering on the stability and activity of anaerobic granular sludge were studied. The degradation ability of the cultivated granules was verified by the traditional Chinese medicine pharmaceutical wastewater. It is important to note that the anaerobic granular sludge in this study is not obtained from the flocculation sludge or the flocculating sludge produced by the broken granular dewatered sludge. Instead, it is obtained from the direct conversion of stable granular dewatered sludge. Firstly, the effect of inoculation sludge on anaerobic granular sludge was studied. In the three kinds of inoculated sludge, the ratio of protein (PNN) and polysaccharide (PS) in extracellular polymer (EPS) was the primary anaerobic sludge of anaerobic sludge, and the higher the PN/PS value, the higher the stability of the granules. The COD removal rate, gas production and CH4 content in anaerobic sludge inoculated with anaerobic sludge were significantly higher than those in other groups, and the activity of granules was significantly higher than that of other groups according to the initial anaerobic sludge aerobic sludge inoculated with anaerobic sludge, and the COD removal rate, gas production and CH4 content in anaerobic sludge inoculated with anaerobic sludge were significantly higher than those in other groups. However, after 27 days of culture, the granular activity tended to be the same, which verified the feasibility of aerobic sludge as inoculation sludge to cultivate anaerobic granular sludge. Secondly, the effects of different substances on anaerobic granular sludge culture before dewatering were studied. As for the improvement of particle stability: when 30min is not placed at 35 鈩，

本文編號：1957048