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  本文關(guān)鍵詞：超濾工藝處理大伙房水源水試驗研究　出處：《沈陽建筑大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 混凝 超濾 膜污染 膜清洗 膜通量

【摘要】：隨著社會的發(fā)展和生活水平的不斷提高,人們對引用水的水質(zhì)的要求越來越高,常規(guī)水處理工藝的局限性日益凸顯。開發(fā)高效、健康的飲用水處理工藝已經(jīng)變得刻不容緩。超濾工藝作為第三代飲用水處理技術(shù)具有出水水質(zhì)穩(wěn)定性高、占地面積小、易于實現(xiàn)自動化操作等優(yōu)點而備受關(guān)注。本文針對大伙房水庫低溫低濁和汛期突發(fā)高濁時常規(guī)工藝難處理,出水水質(zhì)難達標的技術(shù)難題,采用超濾膜技術(shù)處理大伙房水源水,為將來撫順市現(xiàn)有水廠提標改造和新水廠建設(shè)提供技術(shù)依據(jù),也可為北方寒冷地區(qū)及以大伙房水源作為水源的凈水廠建設(shè)提供技術(shù)支撐。本文采用海南立升公司生產(chǎn)的內(nèi)壓式中空纖維超濾膜,對不同水質(zhì)期的大伙房水庫水進行中試研究,考察了不同水質(zhì)期超濾膜工藝對污染物的去除效果以及超濾膜的污染情況。試驗結(jié)果表明,在各個水質(zhì)期超濾膜系統(tǒng)出水的濁度1NTU的保障率達到了90%以上,原水水質(zhì)的變化和工藝的運行條件對出水的濁度沒有明顯的影響。超濾膜系統(tǒng)對微生物的去除效果非常好,去除率接近100%,但是在出水中偶爾能夠檢測到少量微生物的存在,可能因為部分膜絲的破損或是由于反洗的時候從產(chǎn)水箱帶入微生物的原因,因此需要對產(chǎn)水箱定期進行清潔消毒處理,在超濾系統(tǒng)中加入消毒工藝。超濾系統(tǒng)也能去除全部的藻類。在低溫低濁期采用超濾膜直接過濾原水,通過試驗發(fā)現(xiàn),對濁度的去除效果較好,但是對有機物的去除效果較差,而且膜污染增長較快。當采用混凝預(yù)處理之后,對有機物的去除效果有所提升,并且能夠緩解膜污染。在正常水質(zhì)期采用正交試驗設(shè)計方法確定了微絮凝-超濾工藝的最佳運行參數(shù)：處理水量2m3/h；過濾時間40min；加藥量5mg/L。并且確定了影響超濾膜污染的操作參數(shù)的主次順序依次為：處理水量,加藥量,過濾時間。通過正交試驗確定的最優(yōu)參數(shù)組合在污染物的去除效果上要優(yōu)于常規(guī)工藝。在夏季高濁期到來后,常規(guī)的處理工藝已經(jīng)不能保證出水水質(zhì)的穩(wěn)定性,表現(xiàn)最為明顯的是高濁度難以去除。該階段采用常規(guī)沉淀+微絮凝-超濾工藝,出水濁度在0.053～0.146NTU之間,平均值為0.066NTU,遠遠低于飲用水濁度1NTU的要求；對CODMn和UV254的去除率分別為60%和35%,要遠遠好于常規(guī)工藝的出水水質(zhì)。超濾工藝在面對高濁期水質(zhì)突然惡化的情況表現(xiàn)出了良好的穩(wěn)定性。
[Abstract]:With the development of society and the improvement of living standard, people are demanding more and more water quality, and the limitation of conventional water treatment technology is becoming more and more obvious. As the third generation of drinking water treatment technology, ultrafiltration process has high stability of effluent quality and small area. This paper aims at the technical problems of low temperature and low turbidity in Dahuofang Reservoir and difficult to deal with the conventional process in flood season and the quality of effluent is difficult to reach the standard. UF membrane technology is used to treat Dahuofang source water, which provides technical basis for the upgrading of existing water plants and the construction of new water plants in Fushun City in the future. It can also provide technical support for the construction of water purification plant in the cold area of northern China and the water source of Dahuofang. In this paper, the internal pressure hollow fiber ultrafiltration membrane produced by Hainan Lisheng Company is adopted. A pilot study was conducted on the water of Dahuofang Reservoir with different water quality periods. The removal efficiency of pollutants and the fouling of ultrafiltration membrane in different water quality periods were investigated. The turbidity 1 NTU of UF membrane effluent in each water quality period is more than 90%. The change of raw water quality and the operation conditions of the process have no obvious influence on the turbidity of effluent. The removal efficiency of microorganism by UF membrane system is very good, and the removal rate is close to 100%. However, the presence of a small number of microbes can occasionally be detected in the effluent, possibly due to the breakage of some of the filaments or the introduction of microbes from the water tank during backwash. Therefore, it is necessary to clean and disinfect the water tank regularly and add the disinfection technology to the ultrafiltration system. The ultrafiltration system can also remove all algae. In the low temperature and low turbidity period, UF membrane is used to filter the raw water directly. The results showed that the turbidity removal efficiency was better, but the removal efficiency of organic matter was poor, and membrane fouling increased rapidly. After coagulation pretreatment, the removal efficiency of organic matter was improved. The optimum operation parameters of micro-flocculation-ultrafiltration process were determined by orthogonal design method in the normal water quality period: the treated water quantity was 2 m3 / h; Filtration time 40 min; The dosage of 5 mg / L. And the order of the operation parameters affecting UF membrane fouling is as follows: treatment water quantity, dosage. Filtration time. The optimal parameter combination determined by orthogonal test is superior to the conventional process in the removal of pollutants. After the high turbidity period in summer, the conventional treatment process can not guarantee the stability of the effluent quality. The most obvious is that the high turbidity is difficult to be removed. In this stage, conventional precipitation micro-flocculation-ultrafiltration process is used. The turbidity of effluent is between 0.053 and 0.146 NTU, with an average of 0.066 NTU. It is far lower than the requirement of drinking water turbidity 1NTU; The removal rates of CODMn and UV254 were 60% and 35% respectively. The ultrafiltration process shows good stability in the face of sudden deterioration of water quality in high turbidity period.
【學(xué)位授予單位】：沈陽建筑大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU991.2

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