本文關(guān)鍵詞： 臭氧活性炭 微型生物 消毒副產(chǎn)物 AOC 炭濾池 砂濾池　出處：《華南理工大學(xué)》2013年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：常規(guī)凈水工藝處理難以解決飲用水源的微污染問(wèn)題，采用深度處理工藝，提供優(yōu)質(zhì)和安全的飲用水，以更好的與國(guó)際水質(zhì)標(biāo)準(zhǔn)接軌已經(jīng)成為我國(guó)供水行業(yè)的首要任務(wù)。臭氧活性炭（O_3-BAC）技術(shù)以其高效的去除污染物質(zhì)能力已經(jīng)逐漸得到推廣和應(yīng)用。然而，對(duì)于南方濕熱地區(qū)來(lái)說(shuō)，采用此種凈水工藝，就活性炭工藝出水的生物安全性來(lái)講，有許多等待解決和完善的問(wèn)題。 本研究依托國(guó)家“十一五”水專(zhuān)項(xiàng)課題，針對(duì)南方濕熱地區(qū)的水質(zhì)特征，在南方某采用O_3-BAC工藝的水廠內(nèi)進(jìn)行。并通過(guò)建立中試試驗(yàn)系統(tǒng)對(duì)工藝流程進(jìn)行改進(jìn)研究。本文首先考察傳統(tǒng)的后置O_3-BAC工藝的水質(zhì)安全性，針對(duì)現(xiàn)有工藝存在的問(wèn)題提出改善措施，提出中置O_3-BAC工藝并對(duì)此工藝進(jìn)行優(yōu)化研究。研究結(jié)果表明： （1）水廠采用的后置O_3-BAC工藝，對(duì)濁度、氨氮、CODMn值均有較好的去除效果，出水AOC含量低，消毒副產(chǎn)物也均未出現(xiàn)超標(biāo)現(xiàn)象，炭濾池出水濁度略高于砂濾池，出水中的顆粒物可能攜帶細(xì)菌等，存在微型生物泄露的現(xiàn)象。通過(guò)改用四段式的反沖洗方式，后臭氧投加至出水余臭氧0.1mg/L，采用液氯與臭氧聯(lián)合多點(diǎn)投加的方式進(jìn)行全流程消毒等優(yōu)化措施，出水水質(zhì)安全性得到一定改善。 （2）中試系統(tǒng)采用中置O_3-BAC工藝，將炭濾池置于砂濾池之前，并對(duì)炭濾池進(jìn)行曝氣。出水?dāng)?shù)據(jù)顯示，該工藝對(duì)有機(jī)物的去除率與水廠相當(dāng)，加銨試驗(yàn)表明中試工藝對(duì)氨氮有更高的去除率。砂濾池后置能減少出水微型生物數(shù)量，但依然能檢測(cè)到少量細(xì)菌和微型生物，且濁度雖滿足標(biāo)準(zhǔn)，但略高于后置O_3-BAC工藝出水。通過(guò)二次絮凝控制濁度至0.1NTU以下，采用雙層濾砂代替?zhèn)鹘y(tǒng)單層濾砂，根據(jù)具體水質(zhì)情況選擇合適的消毒方式，均有利于減少出水中的細(xì)菌、微型生物等。 （3）對(duì)于中置O_3-BAC工藝，預(yù)臭氧投加量宜控制在0.8mg/L以下，以防止氯酸鹽超標(biāo)，，臭氧聯(lián)合氯消毒雖可解決微型生物泄漏問(wèn)題，但是臭氧投加量超過(guò)1.0mg/L時(shí)，出水AOC大于100μg/L，對(duì)出水生物穩(wěn)定性造成危害，建議在微型生物高發(fā)期（尤其是耐氯性微型生物），后臭氧投加量1.0mg/L以下，再在砂濾池后加氯輔助消毒。
[Abstract]:Conventional water purification process is difficult to solve the problem of micro-pollution of drinking water source. Advanced treatment process is used to provide high quality and safe drinking water. To better conform to the international water quality standards has become the first task of water supply industry in China. The technology of ozone activated carbon and O3-BAChas been gradually popularized and applied with its ability to remove pollutants efficiently. However, for the humid and hot areas in the south, In terms of biological safety of effluent from activated carbon process, there are many problems waiting to be solved and perfected. This research relies on the national "11th five-year plan" water special project, aiming at the water quality characteristic of the southern humid and hot area, The process was improved by establishing a pilot test system. Firstly, the water quality safety of the traditional post-stack O _ 3-BAC process was investigated in this paper, which was carried out in a water plant in the south of China using the O _ S _ 3-BAC process, and a pilot test system was set up to study the improvement of the process. In view of the problems existing in the existing process, the improvement measures are put forward, and the process of middle Ostack _ 3-BAC is put forward and optimized. The results show that:. 1) in the later O3-BAC process adopted by the water plant, the turbidity, ammonia nitrogen and COD _ (mn) values are all well removed, the AOC content in effluent is low, the disinfection by-products are not in excess of the standard, and the turbidity of the effluent from the carbon filter is slightly higher than that of the sand filter. Particulates in the effluent may carry bacteria and so on, resulting in microbiological leakage. By switching to a four-stage backwash, After ozone was added to the effluent, 0.1 mg / L of residual ozone was added to the effluent, and the safety of the effluent water quality was improved to some extent by using liquid chlorine and ozone in combination with multi-point addition to carry out the whole process disinfection and other optimization measures. (2) the pilot system adopts the O _ (3-BAC) process, which places the carbon filter in front of the sand filter and aerates the carbon filter. The effluent data show that the removal rate of organic matter by this process is comparable to that of the water plant. The ammonium addition test showed that the pilot-scale process had a higher removal rate of ammonia nitrogen. The amount of micro-organisms in effluent could be reduced after the sand filter was placed, but a small amount of bacteria and micro-organisms could still be detected, and the turbidity met the standard. But it is a little higher than that of the later OSCO _ 3-BAC process. By controlling turbidity below 0.1NTU by secondary flocculation, using double-layer sand filter instead of traditional single-layer sand filter, and selecting appropriate disinfection method according to specific water quality, it is beneficial to reduce the bacteria in the effluent. A microorganism, etc. (3) for the in-situ O _ 3-BAC process, the pre-ozone dosage should be controlled below 0.8 mg / L to prevent chlorate from exceeding the standard. Although ozone combined with chlorine disinfection can solve the problem of micro-biological leakage, when the ozone dosage exceeds 1.0 mg / L, The effluent AOC is more than 100 渭 g / L, which is harmful to the biological stability of the effluent. It is suggested that the ozone dosage be below 1.0 mg / L at the high occurrence stage of microorganism (especially chlorine-tolerant microorganism), and then chlorine be added to the sand filter to assist disinfection.
【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類(lèi)號(hào)】：TU991.2

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