發(fā)布時(shí)間：2018-05-28 19:52

  本文選題：電吸附 + 活性碳纖維�。� 參考：《環(huán)境工程學(xué)報(bào)》2017年08期

【摘要】：乙酸是有機(jī)廢棄物厭氧消化產(chǎn)氫的重要代謝產(chǎn)物,去除乙酸對(duì)消除產(chǎn)物抑制,提高氫氣產(chǎn)率有重要作用,也是當(dāng)前的技術(shù)難點(diǎn)。首次將電吸附技術(shù)應(yīng)用于乙酸的去除,探討了該技術(shù)路線(xiàn)的可行性。以活性碳纖維為電極材料,考察了電壓、極板間距、流量和初始濃度等因素對(duì)電吸附去除乙酸的影響,并分析了吸附過(guò)程的等溫吸附特性和動(dòng)力學(xué)特性。結(jié)果表明,在電壓為0.9 V,極板間距1 cm,流量21.5 m L·min~(-1)時(shí),可將濃度為1.75 mmol·L~(-1)的乙酸溶液pH值由3.73升高至產(chǎn)氫菌的最適pH范圍4.5~5.5,去除率達(dá)到95%以上,電吸附消除乙酸積累是可行的;等溫吸附過(guò)程符合Freundlich方程;吸附過(guò)程符合一級(jí)反應(yīng)動(dòng)力學(xué)方程。研究結(jié)果對(duì)優(yōu)化厭氧消化產(chǎn)氫工藝有重要指導(dǎo)意義。
[Abstract]:Acetic acid is an important metabolite of hydrogen production in anaerobic digestion of organic waste. Removing acetic acid plays an important role in eliminating product inhibition and increasing hydrogen yield, which is also a technical difficulty at present. For the first time, the electroadsorption technology was applied to the removal of acetic acid, and the feasibility of this technique was discussed. The effects of voltage, plate spacing, flow rate and initial concentration on the removal of acetic acid by electroadsorption were investigated using activated carbon fiber as electrode material. The isothermal adsorption and kinetic characteristics of the adsorption process were analyzed. The results showed that the pH value of acetic acid solution with the concentration of 1.75 mmol / L ~ (-1) could be increased from 3.73 to 4.5 ~ (5) when the voltage was 0.9 V, the plate distance was 1 cm and the flow rate was 21. 5 mL 路min ~ (-1). The removal rate was over 95%. It was feasible to eliminate the accumulation of acetic acid by electroadsorption. The isothermal adsorption process accords with the Freundlich equation and the adsorption process accords with the first-order reaction kinetics equation. The results are of great significance for the optimization of anaerobic digestion process for hydrogen production.
【作者單位】： 泰山醫(yī)學(xué)院化工學(xué)院;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(21501130) 國(guó)家大學(xué)生創(chuàng)新計(jì)劃項(xiàng)目(20150439051) 泰安市科技發(fā)展計(jì)劃項(xiàng)目(2015GX2039)
【分類(lèi)號(hào)】：X781

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