本文選題：海綿鐵　切入點(diǎn)：SBR反應(yīng)器　出處：《蘭州交通大學(xué)》2015年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：隨著我國(guó)工業(yè)化及城鎮(zhèn)化進(jìn)度的推進(jìn),大量污水的未達(dá)標(biāo)排放直接導(dǎo)致了我國(guó)水體的嚴(yán)重污染。尤其是湖泊水庫(kù),絕大部分都處于富營(yíng)養(yǎng)化的狀態(tài),其中的主要的污染物指標(biāo)依然是COD、TN和TP。在眾多的水處理工藝中,SBR反應(yīng)器兼具均化池、初沉池、生化池、二沉池的功能于一身,運(yùn)行控制靈活、抗沖擊復(fù)合強(qiáng),是目前最應(yīng)用廣泛的生化處理工藝之一。然而,傳統(tǒng)SBR反應(yīng)器常存在污泥濃度低、只適用于中小水量、生物脫氮除磷效果不穩(wěn)定等缺陷。海綿鐵是一種比表面積大,含鐵量高的金屬多孔性載體,本課題將海綿鐵載體與傳統(tǒng)的SBR工藝相結(jié)合中,形成生物海綿鐵體系,充分發(fā)揮了SBR反應(yīng)器和海綿鐵載體的優(yōu)點(diǎn)。本課題以未加入海綿鐵的SBR反應(yīng)器為對(duì)照,另外同時(shí)設(shè)置了海綿鐵加量分別為40g/L、90g/L和150g/L的三組SBR反應(yīng)器,從以下幾個(gè)方面研究了海綿鐵的投加對(duì)SBR反應(yīng)器的影響:①海綿鐵投加量為40g/L、90g/L和150g/L時(shí)對(duì)SBR反應(yīng)器中COD、NH3-N、TN和TP去除效果的影響;②海綿鐵投加量為40g/L、90g/L和150g/L時(shí)對(duì)活性污泥中鐵含量、污泥絮體結(jié)構(gòu)、污泥性質(zhì)(MLSS、MLVSS、MLVSS/MLSS和SVI)的影響,對(duì)污泥TTC-DHA活性、污泥INT-ETS活性和鐵細(xì)菌數(shù)量的影響;③海綿鐵投加量為40g/L時(shí)對(duì)SBR反應(yīng)器硝化過(guò)程及反硝化過(guò)程的影響;④分別研究了以生活污水、乙酸鈉、乙酸鈉和葡萄糖混合碳源的和三種不同體系中K+和Mg2+表征生物除磷的可行性作用,并應(yīng)用于海綿鐵對(duì)SBR反應(yīng)器生物除磷性能影響的研究。以上研究的結(jié)果表明:(1)與普通SBR反應(yīng)器相比,海綿鐵加量為40g/L時(shí)反應(yīng)器COD去除效果最好,加量增加長(zhǎng)期運(yùn)行不利于COD的去除;加入海綿鐵后不利于SBR反應(yīng)器對(duì)NH3-N的去除,加量越多,去除效果越差;不同加量均對(duì)TN和TP的去除有促進(jìn)作用,加量為40g/L促進(jìn)作用最明顯。(2)海綿鐵加入后反應(yīng)器中的Fe(Ⅱ)、Fe(Ⅲ)和TFe濃度迅速增加并明顯高于未加入海綿鐵的SBR反應(yīng)器,Fe(Ⅲ)和TFe濃度與海綿鐵加量呈正比;海綿鐵加入后污泥絮體變密實(shí),顏色變深,粒徑變小,并且加量越大,絮體顏色越深、粒徑越小、絮體之間連接物越少;加入海綿鐵后反應(yīng)器的MLSS及MLVSS值均高于普通SBR反應(yīng)器,但MLVSS/MLSS和SVI值卻小于普通SBR反應(yīng)器,海綿鐵加量越多,SVI值越小;加入海綿鐵增強(qiáng)了污泥的TTC-DHA和INT-ETS活性;海綿鐵的加入可以刺激活性污泥中鐵細(xì)菌的生長(zhǎng),加量為90g/L時(shí)鐵細(xì)菌數(shù)量最多。(3)SBR反應(yīng)器中的硝化過(guò)程存在三個(gè)速率不同的階段,SBR反應(yīng)器和海綿鐵-SBR反應(yīng)器的最大硝化速率分別為0.947mg/(gMLVSS·h)和0.652mg/(gMLVSS·h),SBR反應(yīng)器硝化速率更高,完成硝化反應(yīng)的時(shí)間更短;海綿鐵-SBR反應(yīng)器的NNO??3生成速率明顯小于硝化速率,存在同時(shí)硝化反硝化現(xiàn)象,普通SBR反應(yīng)器不存在;海綿鐵-SBR反應(yīng)器反硝化過(guò)程分為3的不同速率的階段,最大反硝化速率為0.366mg/(gMLVSS·h)。(4)3種不同碳源體系中K+和Mg2+濃度的變化與PO43-濃度的變化基本一致,參與生物除磷的過(guò)程;△K/△P數(shù)值和△Mg/△P數(shù)值穩(wěn)定,可以作為表征生物除磷能力的參數(shù)。加入海綿鐵后SBR反應(yīng)器除磷過(guò)程中沒(méi)有出現(xiàn)對(duì)K+濃度的吸收,不存在聚磷菌的生物除磷作用,高濃度的鐵離子完全爭(zhēng)奪了聚磷菌的磷源,除磷主要依靠鐵離子的鐵鹽化學(xué)除磷。
[Abstract]:As China's industrialization and urbanization progress forward, a large number of sewage discharge is not directly led to the serious pollution of water body in our country. Especially in lakes and reservoirs, the vast majority are in the state of eutrophication, the main pollutant index which is still COD, TN and TP. in the water treatment process of many. All pool both SBR reactor, primary clarifier, biochemical pond, two sink the pond in a functional, flexible control and strong shock resistance compound, is currently the most widely used one of the biochemical process. However, the traditional SBR reactor has low sludge concentration, only suitable for small and medium-sized water removal effect of nitrogen and phosphorus instability and other defects. The sponge iron is a large surface area, metal containing porous carrier of high iron content, the SBR process of sponge iron carrier and the combination of the traditional and the formation of biological sponge iron system, give full play to the SBR reactor and the sea The advantages of sponge iron carrier. This paper did not join the SBR reactor of sponge iron were also set up at the same time the sponge iron was 40g/L respectively, three groups of SBR reactor 90g/L and 150g/L, from the following aspects of sponge iron dosage effect on SBR reactor: sponge iron cast with the dose of 40g/L, 90g/L and 150g/L of SBR reactor in COD, NH3-N, TN and TP removal effect; the dosage of sponge iron was 40g/L, 90g/L and 150g/L on the iron content in the activated sludge, sludge floc structure, sludge properties (MLSS, MLVSS, MLVSS/MLSS and SVI) effects on TTC-DHA activity, INT-ETS activity and the effect of sludge of iron bacteria; the sponge iron dosage effect on SBR process of nitrification and denitrification process 40g/L; 4 were studied by domestic sewage, sodium acetate, sodium acetate and glucose mixed carbon sources and three different systems in K+ 鍜孧g2+琛ㄥ緛鐢熺墿闄ょ７鐨勫彲琛屾，

本文編號(hào)：1605618