Lakshmidevi Rajendran, Gandhi Nagarajan Nagendra, Muthukumar Karuppan
Department of Chemical Engineering, Alagappa College of Technology, Anna University, Chennai, 600025, India.
Department of Chemical Engineering, National Institute of Technology, Tiruchirappalli, 620015, India.
Appl Biochem Biotechnol. 2020 Jun;191(2):852-866. doi: 10.1007/s12010-019-03160-5. Epub 2020 Jan 6.
We demonstrate the feasibility of algal lipid production and bioelectricity generation with concurrent treatment of municipal solid waste (MSW) leachate in a double-chamber algal-assisted microbial fuel cell (AAMFC). The cathode chamber was loaded with Synechococcus sp. and MSW leachate whereas anode chamber was loaded with anaerobic microflora. While treating 50% MSW leachate, highest power density (95.63 mW/m), current density (2.48 A/m), and biomass concentration (2.54 g/l) were observed. The algal growth in the cathode chamber increased the oxygen concentration from 5.5 to 8.6 mg/l. Secondly, we studied the influence of salinity in AAMFC performance. The addition of 30 mM NaCl with 50% leachate increased the power and current density to 110.92 mW/m and 5.169 A/m, respectively. It also increased the biomass concentration, protein, and lipid content. The analysis of fatty acid profile of algae confirmed the presence of palmitic acid, stearic acid, and linoleic acid. The proposed technique is effective for concurrent treatment of MSW leachate and power generation besides algal lipid production without external aeration.
我们展示了在双室藻类辅助微生物燃料电池（AAMFC）中同时处理城市固体废物（MSW）渗滤液来生产藻类脂质和生物电的可行性。阴极室装载了聚球藻属和MSW渗滤液，而阳极室装载了厌氧微生物群落。在处理50%的MSW渗滤液时，观察到最高功率密度（95.63 mW/m）、电流密度（2.48 A/m）和生物量浓度（2.54 g/l）。阴极室中的藻类生长使氧气浓度从5.5毫克/升增加到8.6毫克/升。其次，我们研究了盐度对AAMFC性能的影响。添加30 mM氯化钠和50%的渗滤液后，功率和电流密度分别增加到110.92 mW/m和5.169 A/m。它还增加了生物量浓度、蛋白质和脂质含量。藻类脂肪酸谱分析证实了棕榈酸、硬脂酸和亚油酸的存在。所提出的技术对于同时处理MSW渗滤液和发电以及在不进行外部曝气的情况下生产藻类脂质是有效的。
