本文選題：新型納米絮凝劑 + SBR��； 參考：《合肥工業(yè)大學(xué)》2017年碩士論文

【摘要】：我國城市生活污水處理廠的出水水質(zhì)提升到一級A標(biāo)準(zhǔn)后,國內(nèi)很多污水處理工藝出水達(dá)不到該標(biāo)準(zhǔn),污水處理工藝的改革和創(chuàng)新迫在眉睫。本課題利用新型納米絮凝劑(Nanofloc)對SBR工藝進(jìn)行改進(jìn)研究,探究Nanofloc藥劑的理化性質(zhì)和自身性能,利用改進(jìn)后的Nanofloc-SBR工藝提升SBR反應(yīng)器的處理效率。通過對Nanofloc藥劑本身進(jìn)行研究分析,了解了 Nanofloc的理化性質(zhì),初步確定了 Nanofloc-SBR工藝參數(shù)。分析Nanofloc-SBR工藝,投加Nanofloc的反應(yīng)器運(yùn)行過程中污泥性能更加穩(wěn)定;對TN、氨氮的去除效果平均提升了 30%;對TP的去除效果平均提升了 45%。培養(yǎng)到20天以后,出水中的TP含量達(dá)到1mg/L以下;出水中COD、氨氮、TN的含量均達(dá)到一級A排放標(biāo)準(zhǔn)。Nanofloc對活性污泥的性狀存在較大的影響,Nanofloc的絮凝作用使活性污泥增長速率加快;有機(jī)物質(zhì)含量有所下降,投加Nanofloc污泥的MLVSS含量比未投加的少10%左右。Nanofloc的作用對顆粒污泥的形成有所阻礙。出水中Fe含量最高為210ug/L,低于集中式生活飲用地表水源地補(bǔ)充項(xiàng)目標(biāo)準(zhǔn)值的0.3mg/L,污泥中Fe含量最高為4660mg/kg。Nanofloc-SBR工藝處理市政污水時,投加Nanofloc反應(yīng)器對COD、TN、TP的去除效果比未投加Nanofloc反應(yīng)器分別提升10%、30%、50%左右。Nanofloc藥劑在化學(xué)輔助除磷、出水色度和濁度方面的作用比較明顯。投加Nanofloc藥劑能在較短的沉降時間內(nèi)保證活性污泥的沉降效果。未投加Nanofloc反應(yīng)器不能維持足夠量的活性污泥,對市政污水的處理效果較差。投加Nanofloc對活性污泥的性狀也會產(chǎn)生一定的影響,通過SEM照片可以觀察到兩組反應(yīng)器內(nèi)活性污泥中微生物種群的差異。利用中試大型設(shè)備進(jìn)行投加Nanofloc藥劑運(yùn)行SBR工藝,Nanofloc-SBR工藝的污泥快速沉降特點(diǎn)得到體現(xiàn),活性污泥的沉降時間為15min。Nanofloc-SBR中試反應(yīng)器對市政污水中COD、氨氮、TN、TP的去除率分別為90%、95%、65%、80%左右。隨著反應(yīng)器運(yùn)行時間的延長,反應(yīng)器的除磷效果日益增強(qiáng)。在Nanofloc的作用下,中試反應(yīng)器出水的色度和濁度比較低,出水中很少能夠觀察到細(xì)小的活性污泥絮體。
[Abstract]:After the effluent quality of domestic sewage treatment plant is raised to A standard, many domestic wastewater treatment processes can not reach this standard, so the reform and innovation of wastewater treatment process is urgent. In this paper, a new nanometer flocculant (Nanofloc) was used to improve SBR process, to explore the physicochemical properties and properties of Nanofloc, and to improve the treatment efficiency of SBR reactor by the improved Nanofloc-SBR process. The physicochemical properties of Nanofloc were studied and the technological parameters of Nanofloc-SBR were preliminarily determined by studying and analyzing Nanofloc medicament itself. By analyzing Nanofloc-SBR process, the sludge performance of the reactor added Nanofloc was more stable; the removal efficiency of TNN and TP were increased by 300.The removal efficiency of TP was increased by 45g on average. After 20 days of culture, the TP content in effluent was below 1 mg / L, the contents of CODand NH3-N TN in effluent were all up to the first class A discharge standard. Nanofloc had a great influence on the characteristics of activated sludge. The flocculation of Nanofloc accelerated the growth rate of activated sludge. The content of organic matter decreased, and the MLVSS content of Nanofloc sludge was about 10% less than that of unadded sludge. Nanofloc inhibited the formation of granular sludge. The highest Fe content in effluent is 210ugr / L, which is lower than 0.3 mg / L of the standard value of the supplementary project in the centralized drinking and living surface water source area, and the highest Fe content in sludge is 4660 mg / kg 路Nanofloc-SBR process for municipal wastewater treatment. Nanofloc reactor increased the removal efficiency of COD ~ (2 +) TNN _ (TP) by 10% ~ 30%, respectively. Nanofloc reagent played an important role in chemical assisted phosphorus removal, color and turbidity of effluent. The sedimentation effect of activated sludge can be ensured by adding Nanofloc agent in a short settling time. Without Nanofloc reactor, enough activated sludge could not be maintained, and the treatment effect of municipal sewage was poor. The effects of Nanofloc on the characteristics of activated sludge were also observed, and the difference of microbial population in activated sludge between the two groups could be observed by SEM. The characteristics of rapid sludge settlement in SBR process with Nanofloc-SBR process were demonstrated by using a pilot plant with Nanofloc agent. The settling time of activated sludge was 15 min. Nanofloc-SBR pilot-scale reactor could remove COD from municipal sewage, and the removal rate of NH3-TNTP was about 6580%, respectively. With the prolongation of the operation time of the reactor, the phosphorus removal effect of the reactor is increasing day by day. Under the action of Nanofloc, the chroma and turbidity of the effluent from the pilot reactor were relatively low, and the fine activated sludge floc was rarely observed in the effluent.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：X703

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