【摘要】：降解有機(jī)質(zhì)的電產(chǎn)甲烷(electromethanogenesis)技術(shù)在生物能(CH4)的生產(chǎn)、廢水處理、地下水和土壤(及沉積物)生物修復(fù)等領(lǐng)域有著巨大的發(fā)展?jié)摿�。尋找簡捷的方法獲取高活性的生物陰極是該技術(shù)當(dāng)前發(fā)展面臨的一個(gè)突出問題。以最有應(yīng)用潛力的單室無膜微生物電解池(SCMMEC)為反應(yīng)器,對以葡萄糖為可發(fā)酵物質(zhì)代表的SCMMEC陰極上生物膜的評估表明,可利用SCMMEC處理含葡萄糖的廢水來富集電活性生物陰極。當(dāng)外壓為0.8V時(shí),富集的2個(gè)生物陰極的電流密度可分別達(dá)到0.59A/m~2和0.62A/m~2。但該法獲得的生物陰極活性仍然比較低,是陰陽極中的電流限制電極。進(jìn)一步的介體影響評估表明,生物陰極的電活性不受溶液中可能存在的電子介體的影響。在低劑量緩沖鹽(6 mmol/L的磷酸鹽)下的長期運(yùn)行顯示,0.8V外壓下生物陰極的活性在62d和153d時(shí)持平,到275d時(shí)已有明顯下降。長期直流通電單向極化導(dǎo)致的離子濃縮,甚至鹽沉積,可能是生物陰極活性下降的主要原因。
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圖片說明：圖１陰極生物膜和參照電極的電壓掃描圖Ｆｉｇ．１ＶｏｌｔａｇｅｓｃａｎｓｗｉｔｈｃａｔｈｏｄｉｃｂｉｏｆｉｌｍｓａｎｄｉｎａｃｔｉｖａｔｅｄｃａｔｈｏｄｉｃｂｉｏｆｉｌｍｓｉｎｔｈｅＳＣＭＭＥＣ
[Abstract]:Electromethanogenic (electromethanogenesis) technology, which degrades organic matter, has great development potential in the fields of biological energy (CH4) production, wastewater treatment, groundwater and soil (and sediment) remediation and so on. Finding a simple method to obtain high activity biological cathode is a prominent problem in the current development of this technology. The biofilm on SCMMEC cathode represented by glucose as fermentable substance was evaluated by using (SCMMEC), which has the most potential application potential, to enrich the electroactive biological cathode by using SCMMEC to treat the wastewater containing glucose. When the external pressure is 0.8 V, the current densities of the enriched two biological cathodes can reach 0.59A/m~2 and 0.62 A 鈮，

本文編號：2510735