本文選題：皂素廢水 + 鐵碳微電解�。� 參考：《陜西科技大學(xué)》2017年碩士論文

【摘要】：黃姜皂素廢水是一種高濃度、難降解的工業(yè)廢水,其組成比較復(fù)雜,廢水中糖分、有機(jī)物、氨氮含量較高。未降解的皂苷是含一種表面活性劑,皂素廢水具有酸度低、色度大、可生化性差等特點(diǎn),在處理過程中極易產(chǎn)生泡沫,處理難度較大。探索出一條經(jīng)濟(jì)實(shí)用的黃姜皂素預(yù)處理工藝對(duì)黃姜皂素廢水生物處理具有一定意義。本文在大量實(shí)驗(yàn)基礎(chǔ)上,以陜西省華縣某皂素生產(chǎn)廠家的廢水為原料,采用鐵碳微電解-Fenton氧化組合工藝的方法對(duì)皂素廢水進(jìn)行預(yù)處理研究,發(fā)現(xiàn)該工藝能顯著降低黃姜皂素廢水的COD值及色度,為黃姜皂素廢水的生物降解提供了保障。本文研究結(jié)果如下:(1)通過單因素實(shí)驗(yàn)及正交實(shí)驗(yàn)得出在鐵碳微電解階段最佳的反應(yīng)條件是:pH值為3、鐵碳微電解填料投加量為45g/100mL、反應(yīng)時(shí)間為120min、曝氣量控制在10-15mL/min。反應(yīng)結(jié)束后調(diào)節(jié)出水pH為9.0,廢水COD值從97000mg/L降至58006mg/L左右,COD去除率為40.2%,色度從11833度降至6248度,色度去除率為47.6%。除此之外還提高了廢水的可生化性,B/C值由0.27增至0.49。通過研究發(fā)現(xiàn)影響COD去除率主要因素依次為:反應(yīng)時(shí)間p H值曝氣量鐵碳填料投加量;影響色度去除率主要因素依次為:pH值曝氣量鐵碳填料投加量反應(yīng)時(shí)間。鐵碳微電解技術(shù)對(duì)皂素廢水有較好的處理效果。(2)根據(jù)單因素實(shí)驗(yàn)及正交實(shí)驗(yàn)得出經(jīng)微電解處理的皂素廢水在Fenton氧化工藝階段最佳的反應(yīng)條件是:pH值為3、2+Fe濃度為2500mg/L、雙氧水投加量為100mL/L、雙氧水投加的方式為多次投加、反應(yīng)時(shí)間為90min。反應(yīng)結(jié)束后調(diào)節(jié)出水p H為9.0,廢水COD值從97000mg/L降至9765mg/L左右,COD去除率達(dá)89.7%,色度從11833度降至1767度,色度去除率達(dá)84.5%,大幅度的提高了廢水的可生化性,B/C值升至0.63。影響COD去除率主要因素依次為:pH值2+Fe濃度雙氧水投加量反應(yīng)時(shí)間;影響色度去除率主要因素依次為:雙氧水投加量2+Fe濃度pH值反應(yīng)時(shí)間。鐵碳微電解技術(shù)與Fenton氧化工藝組合處理皂素廢水效果良好。(3)采用IR、UV、GPC、HPLC、TOC、GC-MS等譜圖分析手段研究了黃姜皂素廢水預(yù)處理前后有機(jī)物種類及數(shù)量的變化規(guī)律,證實(shí)預(yù)處理可明顯改善廢水水質(zhì)。經(jīng)過鐵碳微電解-Fenton氧化工藝組合對(duì)皂素廢水進(jìn)行預(yù)處理可大大提高廢水的可生化性,使其能達(dá)到可生化處理的要求。
[Abstract]:Zingiber saponin wastewater is a kind of industrial wastewater of high concentration and difficult to degrade. Its composition is complex, and the content of sugar, organic matter and ammonia nitrogen in the wastewater is high. The undegraded saponins contain a kind of surfactant. The saponin wastewater has the characteristics of low acidity, large color and poor biodegradability, so it is easy to produce foam in the treatment process, and the treatment is difficult. To explore an economical and practical pretreatment process of alpinia saponin has certain significance for the biological treatment of ginger saponin wastewater. Based on a large number of experiments, the pretreatment of saponin wastewater from a saponin factory in Huaxian County, Shaanxi Province, was studied by using the iron-carbon micro-electrolysis-Fenton oxidation process. It was found that this process could significantly reduce the COD value and chroma of the ginger saponin wastewater, which provided a guarantee for the biodegradation of the ginger saponin wastewater. The results are as follows: (1) by single factor experiment and orthogonal experiment, the optimum reaction conditions for iron / carbon microelectrolysis are as follows: the pH value is 3, the dosage of iron / carbon micro-electrolytic filler is 45g / 100mL, the reaction time is 120min, and the aeration rate is controlled at 10-15mL / min. At the end of the reaction, the pH of effluent was adjusted to 9. 0, the COD value of wastewater decreased from 97000mg/L to 58006mg/L about 40. 2%, the chromaticity decreased from 11833 to 6248 degrees, and the removal rate of chrominance was 47. 6%. In addition, the biodegradability of wastewater was increased from 0.27 to 0.49. It was found that the main factors affecting the removal rate of COD were: reaction time pH value of aeration amount of iron carbon filler dosage of iron carbon filler and the main factor of affecting the removal rate of chrominance of iron carbon filler was: proportion of iron and carbon filler amount of aeration at 1: ph value and reaction time of adding amount of iron carbon filler. Iron and carbon microelectrolysis technology has a better treatment effect on saponin wastewater. (2) according to the single factor experiment and orthogonal experiment, the optimum reaction condition of the saponin wastewater treated by microelectrolysis in the Fenton oxidation process stage is that the concentration of 3% pH value is 3n2Fe, which is the best reaction condition in the process of oxidation of saponin wastewater by microelectrolysis. The amount of hydrogen peroxide added is 100 mL / L, and the way hydrogen peroxide is added is multiple times. The reaction time is 90 min. At the end of the reaction, the pH of effluent was 9.0, the COD value of wastewater decreased from 97000mg/L to 9765mg/L about 89.7C, the chroma decreased from 11833 degrees to 1767 degrees, and the removal rate of chrominance reached 84.5%, which greatly improved the biodegradability of wastewater and the value of B / P C increased to 0.63. The main factors affecting the removal rate of COD were: the reaction time of hydrogen peroxide at the concentration of 2 Fe and the reaction time of the dosage of 2 Fe in hydrogen peroxide, and the main factors affecting the removal rate of chroma were: the dosage of hydrogen peroxide and the pH value of the concentration of 2 Fe. The combination of iron-carbon micro-electrolysis and Fenton oxidation process was used to treat saponin wastewater. It is proved that pretreatment can obviously improve the quality of wastewater. Pretreatment of saponin wastewater by iron-carbon micro-electrolysis-Fenton oxidation process can greatly improve the biodegradability of wastewater and make it meet the requirement of biodegradable treatment.
【學(xué)位授予單位】：陜西科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：X703

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本文編號(hào)：1974286