电化学系统集成到产酸反应器中增强厌氧产酸：水力停留时间（HRT）的影响及细菌和嗜酸甲烷古菌的作用。
Enhancement of anaerobic acidogenesis by integrating an electrochemical system into an acidogenic reactor: effect of hydraulic retention times (HRT) and role of bacteria and acidophilic methanogenic Archaea.
机构信息
Key Laboratory of Industrial Ecology and Environmental Engineering (Dalian University of Technology), Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China; NUS Environmental Research Institute, National University of Singapore, 1 Create Way, Create Tower #15-02, Singapore 138602, Singapore.
Key Laboratory of Industrial Ecology and Environmental Engineering (Dalian University of Technology), Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
出版信息
Bioresour Technol. 2015 Mar;179:43-49. doi: 10.1016/j.biortech.2014.11.102. Epub 2014 Dec 6.
In this study, an acidogenic reactor packed with a pair of Fe-carbon electrodes (R1) was developed to enhance anaerobic acidogenesis of organic wastewater at short hydraulic retention times. The results indicated that the acidogenic efficiency was improved by settling a bio-electrochemical system. When hydraulic retention times decreased from 12 to 3h, R1 showed 18.9% more chemical oxygen demand removal and 13.8% more acidification efficiency. After cutting off the voltage of R1, the COD removal decreased by about 5%. Coupling of Fe(2+) leaching and electric field accelerated the hydrolysis of polysaccharide, relieving its accumulation in the sludge phase. Several acidophilic methanogenic Archaea such as Methanosarcina sp. were enriched in R1, which was favorable for consuming organic acids and preventing excessive pH decline. Thus, the developed acidogenic reactor with Fe-carbon electrodes is expected to be potentially effective and useful for wastewater treatment.
在这项研究中，开发了一种装有一对铁碳电极的产酸反应器（R1），以在短水力停留时间下增强有机废水的厌氧产酸作用。结果表明，沉降生物电化学系统提高了产酸效率。当水力停留时间从 12 小时减少到 3 小时时，R1 的化学需氧量去除率提高了 18.9%，酸化效率提高了 13.8%。切断 R1 的电压后，COD 去除率下降了约 5%。Fe(2+)浸出和电场的耦合加速了多糖的水解，缓解了其在污泥相中积累。在 R1 中富集了一些嗜酸性产甲烷古菌，如 Methanosarcina sp.，这有利于消耗有机酸并防止 pH 值过度下降。因此，开发的带有铁碳电极的产酸反应器有望在废水处理方面具有潜在的有效性和实用性。
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