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首頁> 外文學(xué)位 >Enlevement de la DCO d'une eau usee synthetique dans un reacteur tubulaire biologique (RTB).
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Enlevement de la DCO d'une eau usee synthetique dans un reacteur tubulaire biologique (RTB).

機(jī)譯：在生物管式反應(yīng)器（RTB）中從合成廢水中去除COD。

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摘要

This research project was aimed at describing the treatment process and more specifically, the removal of COD, in a Tubular Biological Reactor (TBR). The particular configuration of the reactor allowed for a nearly perfect plugflow and the development of a pressure gradient in the first half of the tube; a maximum pressure of 22,6 mm of water was recorded at 57,4 m from the inlet.; Soluble COD removal followed a zero-order reaction in the first half of the tube and a first-order reaction thereafter. The affluent mean soluble substrate concentration was 204 mg/L and that of the effluent was 15 mg/L at its greatest. This represented a removal efficiency of over 92%. Total COD removal seemed to evolve in a similar pattern to that of soluble COD. The affluent's average total COD concentration during the entire study was 309 mg/L and that of the effluent usually varied between 4 mg/L and 20 mg/L, but could sometimes reach 50 mg/L. A temporary overload of 500 mg/L total COD could be absorbed by the reactor's biomass without exceeding 30 mg/L total COD at the effluent.; A cyclical pattern of slime build up and sloughing lasting an average of 2,3 days was observed. This cycle, induced by the rapid growth of the biomass in the first half of the tube, acted as a natural control mechanisms of slime thickness. The average sludge production during a 2-day period was 98,3 mg SS/g total COD removed; 50% of which was purged in only 5 hours.; Organic nitrogen removal efficiency was 82%. Its concentration at the affluent was almost the same as that of nitrates at the effluent. An over-production of nitrates and a subsequent denitrification were measured in the first half of the tube. This phenomenon was attributed to the activity of fungi capable of heterotrophic nitrification.; The role of fungi in wastewater treatment is poorly known. However, there seems to exist a symbiosis between fungi and facultative anaerobic bacteria in the first half of the tube resulting in an improved removal efficiency of soluble COD by the aerobic biomass in the second half of the tube, thus explaining the behaviour of the TBR. (Abstract shortened by UMI.)
機(jī)譯：該研究項(xiàng)目旨在描述管狀生物反應(yīng)器（TBR）中的處理過程，更具體地說是COD的去除。反應(yīng)器的特殊配置可實(shí)現(xiàn)近乎完美的活塞流，并在管的前半部分形成壓力梯度。在距入口57.4 m處記錄到最大水壓為22.6 mm。可溶性COD的去除是在試管的前半部分進(jìn)行零階反應(yīng)，然后進(jìn)行一階反應(yīng)。富集的平均可溶性底物濃度為204 mg / L，流出物的最大濃度為15 mg / L。這表示去除效率超過92％?？侰OD去除似乎以與可溶性COD相似的方式演變。在整個(gè)研究過程中，富裕者的平均總COD濃度為309 mg / L，流出物的平均總COD濃度通常在4 mg / L和20 mg / L之間變化，但有時(shí)可能達(dá)到50 mg / L。反應(yīng)器的生物量可以吸收500 mg / L的總COD暫時(shí)超載，而出水處的總COD不會(huì)超過30 mg / L。觀察到粘液堆積和脫落的周期性模式，平均持續(xù)2,3天。該循環(huán)是由試管前半部分中生物量的快速增長(zhǎng)引起的，它是粘液厚度的自然控制機(jī)制。 2天期間的平均污泥產(chǎn)量為98.3 mg SS / g去除的總COD；僅在5個(gè)小時(shí)內(nèi)清除了其中的50％；有機(jī)氮去除效率為82％。它在富裕處的濃度與流出物中硝酸鹽的濃度幾乎相同。在試管的前半部分測(cè)量到硝酸鹽的過量生產(chǎn)和隨后的反硝化作用。這種現(xiàn)象歸因于能夠異養(yǎng)硝化的真菌的活性。真菌在廢水處理中的作用鮮為人知。但是，在試管的前半部分似乎存在真菌和兼性厭氧細(xì)菌之間的共生關(guān)系，導(dǎo)致試管的后半部分中的好氧生物質(zhì)對(duì)可溶性COD的去除效率提高，從而解釋了TBR的行為。 （摘要由UMI縮短。）

著錄項(xiàng)

  • 作者

    Roy, Nicole A.;

  • 作者單位

    Ecole Polytechnique, Montreal (Canada).;

  • 授予單位 Ecole Polytechnique, Montreal (Canada).;
  • 學(xué)科 Engineering Civil.
  • 學(xué)位 Ph.D.
  • 年度 1992
  • 頁碼 227 p.
  • 總頁數(shù) 227
  • 原文格式 PDF
  • 正文語種 eng
  • 中圖分類 建筑科學(xué);
  • 關(guān)鍵詞

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