在不同盐度影响下,研究了生物阴极微生物燃料电池(BCMFC)的脱氮除碳及产电性能,分析了COD和NH+4-N的降解动力学以及硝化反硝化酶的活性。结果表明:盐度为10%海水比例的BCMFC性能最佳,TN去除率为86.99%,COD去除率为99%,最大输出功率为2 5...在不同盐度影响下,研究了生物阴极微生物燃料电池(BCMFC)的脱氮除碳及产电性能,分析了COD和NH+4-N的降解动力学以及硝化反硝化酶的活性。结果表明:盐度为10%海水比例的BCMFC性能最佳,TN去除率为86.99%,COD去除率为99%,最大输出功率为2 520 m W/m3,内阻为151Ω;当盐度达到50%海水比例时,污染物去除率下降,输出功率减少至175 m W/m3,内阻增大了约9倍。10%海水比例时的COD降解和NH+4-N的去除动力学级数均为一级,且对应的反应速率常数最大,分别是盐度为70%海水比例的2.4倍和5倍;当盐度达到50%海水比例时,硝化反硝化酶的活性受到明显抑制。展开更多
Improving the production of methane, while maintaining a significant level of process stability, is the main challenge in the anaerobic digestion process. Recently, microbial electrolysis cell(MEC) has become a promis...Improving the production of methane, while maintaining a significant level of process stability, is the main challenge in the anaerobic digestion process. Recently, microbial electrolysis cell(MEC) has become a promising method for CO_2 reduction produced during anaerobic digestion(AD) and leads to minimize the cost of biogas upgrading technology. In this study, the MEC-AD coupled reactor was used to generate and utilize the endogenous hydrogen by employing biocompatible electrodeposited cobalt-phosphate as catalysts to improve the performance of stainless steel mesh and carbon cloth electrodes. In addition, the modified version of ADM1 model(ADM1 da) was used to simulate the process. The result indicated that the MEC-AD coupled reactor can improve the CH_4 yield and production rate significantly. The CH_4 yield was enhanced with an average of 48% higher than the control. The CH_4 production rate was also increased 1.65 times due to the utilization of endogenous hydrogen.The specific yield, flow rate, content of CH_4, and p H value were the variables that the model was best at predicting(with indexes of agreement: 0.960/0.941, 0.682/0.696, 0.881/0.865, and 0.764/0.743) of the process with SSmeshes 80/SS-meshes 200, respectively. Employing the catalyzed SS mesh cathode, in the MEC-AD coupled reactor, could be an effective approach to generate and facilitate the utilization of endogenous hydrogen in anaerobic digestion of CH_4 production technology, which is a promising and feasible method to scale up to the industrial level.展开更多
文摘在不同盐度影响下,研究了生物阴极微生物燃料电池(BCMFC)的脱氮除碳及产电性能,分析了COD和NH+4-N的降解动力学以及硝化反硝化酶的活性。结果表明:盐度为10%海水比例的BCMFC性能最佳,TN去除率为86.99%,COD去除率为99%,最大输出功率为2 520 m W/m3,内阻为151Ω;当盐度达到50%海水比例时,污染物去除率下降,输出功率减少至175 m W/m3,内阻增大了约9倍。10%海水比例时的COD降解和NH+4-N的去除动力学级数均为一级,且对应的反应速率常数最大,分别是盐度为70%海水比例的2.4倍和5倍;当盐度达到50%海水比例时,硝化反硝化酶的活性受到明显抑制。
基金Supported by the State Key Development Program for Basic Research of China(2013CB733501)the National Natural Science Foundation of China(21476106)+1 种基金the Natural Science Foundation of Jiangsu Province(BK20130062)the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)(PPZY2015A044)
文摘Improving the production of methane, while maintaining a significant level of process stability, is the main challenge in the anaerobic digestion process. Recently, microbial electrolysis cell(MEC) has become a promising method for CO_2 reduction produced during anaerobic digestion(AD) and leads to minimize the cost of biogas upgrading technology. In this study, the MEC-AD coupled reactor was used to generate and utilize the endogenous hydrogen by employing biocompatible electrodeposited cobalt-phosphate as catalysts to improve the performance of stainless steel mesh and carbon cloth electrodes. In addition, the modified version of ADM1 model(ADM1 da) was used to simulate the process. The result indicated that the MEC-AD coupled reactor can improve the CH_4 yield and production rate significantly. The CH_4 yield was enhanced with an average of 48% higher than the control. The CH_4 production rate was also increased 1.65 times due to the utilization of endogenous hydrogen.The specific yield, flow rate, content of CH_4, and p H value were the variables that the model was best at predicting(with indexes of agreement: 0.960/0.941, 0.682/0.696, 0.881/0.865, and 0.764/0.743) of the process with SSmeshes 80/SS-meshes 200, respectively. Employing the catalyzed SS mesh cathode, in the MEC-AD coupled reactor, could be an effective approach to generate and facilitate the utilization of endogenous hydrogen in anaerobic digestion of CH_4 production technology, which is a promising and feasible method to scale up to the industrial level.
