本文選題：吸附絮凝 + 無機絮凝劑　； 參考：《昆明理工大學》2015年碩士論文

【摘要】：目前,環(huán)境受重金屬污染越來越嚴重,鉛對水環(huán)境的污染尤為突出。鉛及一些可溶性鉛鹽都含有毒性,受重金屬鉛離子污染的水體對生物體有著巨大的毒害作用。針對含鉛廢水的除去問題,我們決定采用化學絮凝沉淀與微生物吸附劑聯(lián)用的方法來處理。本文通過對五種混凝劑聚合氯化鋁、聚合氯化鐵、聚合硫酸鐵、硫化鈉、DTCR以及鋁鹽鐵鹽組合對不同進水鉛濃度的模擬廢水進行除鉛處理實驗,考察絮凝劑除鉛效果并進行對比,確定最終除鉛藥劑為無機組合絮凝劑PAC/PFS。接著對篩選出的耐鉛微生物吸附絮凝劑干菌對含鉛廢水的處理效果進行試驗研究,考察微生物絮凝劑對無機組合絮凝劑的助凝效果。結果如下：(1)通過絮凝劑的篩選,確定無機組合混凝劑PAC/PFS為最終的除鉛藥劑。(2)耐鉛微生物非活性吸附劑對鉛離子有著較強的吸附作用,實驗結果表明：溶液pH、絮凝劑投加量是影響該微生物非活性吸附劑的最主要的因素,而振蕩時間、溫度、搖床轉速等也對其除鉛效果產生一定的影響,但影響相對較小。(3)本實驗結果表明結合少量微生物干菌的使用,能夠提高無機組合絮凝劑對含鉛廢水的處理效果,降低無機組合混凝劑的投加量,并提高對含鉛廢水的處理效果。且微生物干菌對含鉛廢水的處理效果與PAC/PFS的比值沒有直接關系,也就是說無機組合-微生物絮凝劑聯(lián)合除鉛,PAC/PFS仍可以以任意比例組合。無機組合-微生物絮凝劑處理含鉛廢水時最佳pH值為6,最佳投加順序為先投加微生物絮凝劑后投加無機組合絮凝劑。
[Abstract]:At present, the environment is polluted by heavy metal more and more seriously, especially lead pollution to water environment. Lead and some soluble lead salts are toxic, and the water polluted by heavy metal lead ions has a great toxic effect on organisms. In view of the problem of removal of lead-containing wastewater, we have decided to use chemical flocculation precipitation and microbial adsorbent to treat it. In this paper, five coagulants, polyaluminium chloride, polyferric sulfate, sodium sulphide DTCR and aluminum salt iron salt, were used to treat simulated wastewater with different influent concentration of lead. The effect of flocculant on removing lead was investigated and compared. The final lead removal agent is the inorganic combined flocculant PAC / PFS. Then, the treatment effect of lead-tolerant microbial adsorptive flocculant dry bacteria on lead-containing wastewater was studied, and the effect of microbial flocculant on inorganic combined flocculant was investigated. The results were as follows: (1) through the selection of flocculants, the inorganic combined coagulant PAC/PFS was determined to be the ultimate lead removal agent. The results show that the pH of solution and the dosage of flocculant are the most important factors affecting the non-active adsorbent of the microorganism, and the oscillation time, temperature and rotating speed of shaking bed also have some effects on the removal of lead. The results showed that the treatment effect of inorganic combined flocculant on lead-containing wastewater could be improved and the dosage of inorganic composite coagulant could be reduced by combining with the use of a small amount of microbial dry bacteria. The treatment effect of lead-containing wastewater was improved. The treatment effect of microbial dry bacteria on lead-containing wastewater is not directly related to the ratio of PAC/PFS, that is to say, the combination of inorganic combination and microbial flocculant can still be combined with PAC- / PFS in any proportion. The optimum pH value of inorganic combination-microbial flocculant for treatment of lead-containing wastewater is 6, and the best addition order is to add microbial flocculant first and then inorganic combined flocculant.
【學位授予單位】：昆明理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：X751

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