本文選題：卡拉膠壓榨水　切入點(diǎn)：絮凝劑　出處：《上海應(yīng)用技術(shù)學(xué)院》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：本論文根據(jù)卡拉膠廢水(卡拉膠壓榨水和第一次水洗液)現(xiàn)狀及卡拉膠廢水的來(lái)源和特點(diǎn),針對(duì)卡拉膠行業(yè)面臨的嚴(yán)峻形勢(shì)和挑戰(zhàn),了解工業(yè)廢水常用的處理技術(shù)。在此基礎(chǔ)上,研究了化學(xué)絮凝法對(duì)卡拉膠壓榨水和第一次水洗液的處理。從企業(yè)要求出發(fā),選擇簡(jiǎn)單可行的方法對(duì)壓榨水和第一次水洗液進(jìn)行處理研究,以期處理后的壓榨水可回用,第一次水洗液的出水水質(zhì)得到提高。本論文得出以下研究?jī)?nèi)容及結(jié)果：(1)對(duì)卡拉膠壓榨水的絮凝處理：采用聚合氯化鋁(PAC)作絮凝劑,考察絮凝劑添加量、溫度、pH、沉降時(shí)間對(duì)絮凝效果的影響；聚丙烯酰胺(PAM)作助凝劑與PAC復(fù)合使用,考察PAM、PAC添加量、溫度、pH對(duì)絮凝效果的影響。結(jié)果表明,PAC/PAM復(fù)合絮凝劑的使用可有效降低小分子卡拉膠的含量,提高絮凝效率,PAC添加量及水樣pH對(duì)處理效果影響較明顯。實(shí)驗(yàn)以卡拉膠的去除率和Al3+的殘留量為指標(biāo),確定了絮凝劑處理壓榨水的較佳試驗(yàn)工藝。結(jié)果顯示,PAC/PAM復(fù)合絮凝劑對(duì)卡拉膠壓榨水的處理效果普遍優(yōu)于PAC; PAC、PAM用量分別為2g/L、15mg/L, pH 5-8,溫度25-35℃,沉降時(shí)間30min,在上述條件下,小分子卡拉膠的去除率達(dá)到90.0%以上,Al3+殘留量小于0.2mg/L,水樣色澤接近蒸餾水,可回用于卡拉膠生產(chǎn)其他用水工段。(2)由于第一次水洗液水質(zhì)較復(fù)雜,高堿度、高色度、高COD、高氯等特點(diǎn),使得第一次水洗液處理難度較大。實(shí)驗(yàn)選用聚合氯化鋁(PAC)、聚合硫酸鋁鐵(PAFS)、聚合硫酸鐵(PFS)、AlCl3及殼聚糖(CTS)作為絮凝劑對(duì)廢水進(jìn)行處理,實(shí)驗(yàn)確定PAC、PFS、CTS三種作為絮凝劑；選擇四種不同類型聚丙烯酰胺(PAM)作助凝劑,結(jié)果顯示,分子量800萬(wàn)的陰離子型聚丙烯酰胺效果較好。實(shí)驗(yàn)過(guò)程中,由于第一次水洗液堿度很大,需經(jīng)過(guò)酸中和,然后進(jìn)行實(shí)驗(yàn)。實(shí)驗(yàn)以COD和色度去除率為指標(biāo),考察絮凝劑的種類、用量,助凝劑種類、用量及pH對(duì)絮凝效果的影響。結(jié)果顯示,混凝劑對(duì)第一次水洗液處理效果普遍優(yōu)于絮凝反應(yīng)。從實(shí)驗(yàn)結(jié)果也可得出,對(duì)于COD及色度較高的第一次水洗液絮凝的處理其添加量：PAC添加量為3.50g/L, PFS添加量為5.25g/L, PAM添加量為0.15g/L,待處理水樣pH為4-5左右,對(duì)COD及色度去除效果最佳,即COD去除率為73.70%,色度去除率為72.80%左右；對(duì)于高COD低色度的第一次水洗液而言,采用復(fù)合絮凝劑CTS/PAC/PAM對(duì)其處理效果最佳,在CTS添加量為0.10g/L, PAC添加量為3.50g/L, PAM添加量為0.20g/L,待處理水樣pH調(diào)節(jié)至7左右的條件下,該絮復(fù)合凝劑對(duì)第一次水洗液的處理效果最佳。在次條件下,COD去除率為54.20%左右,色度去除率為73.50%。綜上所述,PAC/PAM復(fù)合絮凝劑處理卡拉膠壓榨水,得到較好的處理效果,基本滿足企業(yè)要求。選擇合適的絮凝劑處理第一次水洗液得到較好的效果,提高出水水質(zhì)。
[Abstract]:This paper is based on the carrageenan wastewater (carrageenan squeezed water and first wash water) source and characteristics of the status quo and carrageenan wastewater, in view of the severe situation and challenges facing the industry understand the carrageenan, commonly used in industrial wastewater treatment technology. Based on the study of chemical flocculation of carrageenan squeezed water and the first washing liquid from the treatment. The requirements of the enterprise, choose the simple and feasible method for processing of squeezed water and the first washing solution, in order to handle after squeezing water can be reused, the first water washing solution can be improved. This paper draws the contents and results as follows: (1) flocculation squeezed water of carrageenan by polymerization aluminum chloride (PAC) flocculant, dosage of flocculant, pH, effects of temperature, sedimentation time effect on flocculation effect; polyacrylamide (PAM) as coagulant and PAC composite, PAM PAC study, Tim Dosage, temperature, the effect of pH on the flocculation effect. The results showed that PAC/PAM composite flocculant can effectively reduce the content of small molecules of carrageenan, improve the flocculation efficiency, effect of adding amount of PAC and pH on the water treatment effect is obvious. The removal rate of carrageenan and Al3+ residues as the index to determine the flocculant processing squeezed water better test process. The results showed that PAC/PAM composite flocculant of carrageenan squeezed water treatment effect is better than PAC; PAC, PAM were 2g/L, 15mg/L, pH 5-8, temperature 25-35 C, the settling time of 30min, under the above conditions, the small molecule carrageenan removal rate reached more than 90%, Al3+ residual the amount is less than 0.2mg/L, water color close to the distilled water, can be used in other water carrageenan production section. (2) due to the first washing liquid quality is complex, high alkalinity, high chroma, high COD, high chlorine and other characteristics, so that the first time The washing liquid is difficult to treat. The experiment using poly aluminum chloride (PAC), poly aluminum ferric sulfate (PAFS), polyferric sulfate (PFS), AlCl3 (CTS) and chitosan as flocculant for wastewater treatment experiment to determine PAC, PFS, CTS three as flocculant; choose four different types of polyacrylamide (PAM) as a coagulant, showed better effect of anionic polyacrylamide with molecular weight of 8 million. During the experiment, the first water alkalinity, after acid neutralization, then experiments with the COD and color removal rate as the index, species, effects of the dosage of flocculant, coagulant type, dosage and effect of pH on the flocculation effect. The results showed that the coagulant on the treatment effect is better than the flocculation reaction first wash water. From the experimental results can also be obtained for the first time, treatment of washing solution flocculation COD and chroma of the higher the amount of PAC added: The amount of 3.50g/L, PFS dosage 5.25g/L, PAM dosage of 0.15g/L, to be treated water for about 4-5 of pH, COD and color removal effect is the best, the removal rate of COD is 73.70%, the color removal rate is about 72.80%; for the first time washing liquid of high COD and low chroma, using the composite flocculant CTS/PAC/PAM the best treatment effect, when the amount of CTS was 0.10g/L, PAC dosage of 3.50g/L, dosage of PAM was 0.20g/L, the pending water pH adjusted to about 7, the floc composite flocculant for the first time washing liquid treatment effect is the best. In this condition, the removal rate of COD is about 54.20%, the removal rate of chroma 73.50%. in PAC/PAM composite flocculant carrageenan squeezed water, get a good treatment effect, basically meet the requirements of enterprises. Choose a suitable flocculant first washing liquid has better effect and improve water quality.

【學(xué)位授予單位】：上海應(yīng)用技術(shù)學(xué)院
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：X792

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本文編號(hào)：1600920