本文選題：反滲透濃水 + 活性炭吸附�。� 參考：《太原理工大學(xué)》2013年碩士論文

【摘要】：與傳統(tǒng)的水處理工藝相比,反滲透技術(shù)有其獨(dú)特的優(yōu)點(diǎn)。隨著膜技術(shù)的研究和制造業(yè)的不斷發(fā)展,反滲透技術(shù)在海水和苦咸水淡化、純水和超純水、食品加工、城市供水和工業(yè)用水、工業(yè)廢水和城市污水的深度處理等領(lǐng)域都得到了廣泛的應(yīng)用,反滲透技術(shù)在未來(lái)水處理領(lǐng)域的應(yīng)用前景極其廣闊。反滲透技術(shù)產(chǎn)生清水的同時(shí)也產(chǎn)生了濃縮水,濃縮水對(duì)環(huán)境的影響越來(lái)越引起人們的重視。目前反滲透濃水的傳統(tǒng)處理方法有：直接和間接排放、綜合利用,但是這些方法都不能從根本上解決減少反滲透濃水的排放量,造成水資源的浪費(fèi)。為了減少反滲透濃水對(duì)環(huán)境的影響,研究反滲透濃水回收利用的新技術(shù)是反滲透濃水處理的發(fā)展趨勢(shì)。目前對(duì)于反滲透濃水的處理方法研究最多的是膜處理法,由于反滲透濃水中含有較高濃度的鹽和有機(jī)物,反滲透濃水中的鈣鎂等離子在膜法深度處理反滲透濃水中極其導(dǎo)致結(jié)垢,造成膜的污堵,濃水中的有機(jī)物也會(huì)造成膜的污染,使膜的透水率降低。因此在膜法處理之前應(yīng)對(duì)反滲透濃水進(jìn)行預(yù)處理,去除水中的有機(jī)物和鈣鎂等對(duì)膜不利的物質(zhì)。在閱讀大量文獻(xiàn)的基礎(chǔ)上,本課題太原市某食品加工廠鍋爐進(jìn)水反滲透濃水為研究對(duì)象,以研究經(jīng)濟(jì)可行的預(yù)處理工藝為目的,采用活性炭吸附法和軟化—混凝法對(duì)反滲透濃水進(jìn)行預(yù)處理,考察了單一工藝處理反滲透濃水的最佳處理?xiàng)l件和對(duì)各水質(zhì)指標(biāo)的影響,以及兩種工藝聯(lián)合對(duì)反滲透濃水的處理效果。 活性炭特有的孔隙結(jié)構(gòu),使其在水處理領(lǐng)域有著廣泛的應(yīng)用,活性炭對(duì)水中的有機(jī)物有著極強(qiáng)的吸附能力,能吸附傳統(tǒng)工藝無(wú)法去除的有機(jī)物。本論文選用粉末活性炭吸附反滲透濃水中的有機(jī)物,考察了活性炭投加量、pH值、吸附時(shí)間對(duì)COD去除率的影響。實(shí)驗(yàn)結(jié)果表明,活性炭投加量為100mg/L, pH值為6,吸附時(shí)間為40min時(shí),吸附效果最好,COD的去除率為52.62%。 對(duì)于反滲透濃水中的硬度和堿度,本論文采用軟化—混凝法去除。為了將濃水中的硬度和堿度降低至反滲透進(jìn)水水質(zhì)要求,軟化工藝采用石灰—純堿法,混凝劑選用聚合硫酸鐵和聚丙烯酰胺復(fù)合投加。在藥劑最佳投加量條件下：石灰投加量1250mg/L,純堿400mg/L,聚合硫酸鐵40mg/L,聚丙烯酰胺3mg/L,經(jīng)處理后出水水質(zhì)參數(shù)為總硬度和COD分別為160.77mg/L、43.31mg/L,濁度為1.59NTU。 采用活性炭吸附和軟化—混凝組合工藝對(duì)反滲透濃水進(jìn)行預(yù)處理,研究了兩種不同組合工藝對(duì)反滲透濃水的處理效果和活性炭吸附處理軟化—混凝出水的最佳反應(yīng)條件,實(shí)驗(yàn)結(jié)果表明軟化—混凝—活性炭工藝對(duì)反滲透濃水的處理效果較好,活性炭吸附的最佳反應(yīng)條件為活性炭投加量75mg/L, pH為6,吸附時(shí)間為30min。采用軟化—混凝—活性炭組合工藝在最佳條件下處理反滲透濃水,出水達(dá)到反滲透進(jìn)水水質(zhì)要求。
[Abstract]:Compared with the traditional water treatment process, reverse osmosis technology has its unique advantages. With the development of membrane technology and manufacturing industry, reverse osmosis technology has been used in desalination of seawater and brackish water, pure and ultra-pure water, food processing, urban water supply and industrial water, Industrial wastewater and advanced treatment of municipal wastewater have been widely used. Reverse osmosis technology has a very broad application prospect in the field of water treatment in the future. Reverse osmosis (RO) technology not only produces clear water but also condensed water. At present, the traditional treatment methods of reverse osmosis concentrated water are as follows: direct and indirect discharge, comprehensive utilization, but these methods can not fundamentally solve the problem of reducing the discharge of reverse osmosis concentrated water, resulting in waste of water resources. In order to reduce the impact of reverse osmosis (RO) concentrated water on the environment, it is the development trend of reverse osmosis (RO) concentrated water treatment to study the new technology of reverse osmosis (RO) concentrated water recovery and utilization. At present, membrane treatment is the most widely studied method for the treatment of concentrated reverse osmosis water. Because of the high concentration of salt and organic matter in the concentrated water of reverse osmosis, The plasma of calcium and magnesium in the thick water of reverse osmosis (RO) in the advanced treatment of the concentrated water of reverse osmosis (RO) can cause fouling and fouling of the membrane, and the organic matter in the concentrated water will also cause the fouling of the membrane and decrease the water permeability of the membrane. Therefore, before membrane treatment, reverse osmosis concentrated water should be pretreated to remove organic matter, calcium and magnesium and other unfavorable substances. On the basis of reading a large number of documents, the subject of this paper is to study the influent reverse osmosis concentrated water of a food processing plant in Taiyuan, with the aim of studying the economical and feasible pretreatment process. Activated carbon adsorption method and softening coagulation method were used to pretreat the concentrated reverse osmosis water. The optimum treatment conditions and the effects on the water quality indexes of the single process were investigated. And the treatment effect of the two processes on reverse osmosis concentrated water. Activated carbon has been widely used in the field of water treatment due to its unique pore structure. Activated carbon has a strong adsorption capacity for organic matter in water and can adsorb organic matter which can not be removed by traditional technology. In this paper, the effects of the dosage of activated carbon and pH value, adsorption time on the removal rate of COD were investigated by using powdered activated carbon to adsorb organic matter in the concentrated water of reverse osmosis. The experimental results show that when the dosage of activated carbon is 100mg / L, pH value is 6, and adsorption time is 40min, the removal rate of COD is 52.62%. The hardness and basicity of the concentrated reverse osmosis water were removed by softening-coagulation method in this paper. In order to reduce the hardness and alkalinity of concentrated water to the requirement of reverse osmosis influent water, lime-soda method was adopted in the softening process, and the coagulant was mixed with polyferric sulfate and polyacrylamide. Under the optimum dosing conditions: lime 1250mg / L, soda 400 mg / L, polyferric sulfate 40mg / L, polyacrylamide 3mg / L, the total hardness and COD of treated effluent were 160.77 mg / L, 43.31 mg / L and 1.59 NTU, respectively. The pretreatment of reverse osmosis (RO) concentrated water with activated carbon adsorption and softening coagulation combination process was carried out. The treatment effect of two different combination processes on reverse osmosis concentrated water and the optimum reaction conditions of activated carbon adsorption treatment for softening and coagulating effluent were studied. The results showed that the softening-coagulation-activated carbon process was effective in treating the concentrated water from reverse osmosis. The optimum reaction conditions for activated carbon adsorption were as follows: the dosage of activated carbon was 75mg / L, pH was 6, and the adsorption time was 30min. The concentrated reverse osmosis water was treated by the combination of softening coagulation and activated carbon under the optimum conditions and the effluent reached the requirement of the influent water quality of reverse osmosis.
【學(xué)位授予單位】：太原理工大學(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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