Various anaerobic processes have been explored for the energy-efficient treatment of municipal wastewater.However,dissolved methane in anaerobic effluent appears to be a barrier towards the energy and carbon neutralit...Various anaerobic processes have been explored for the energy-efficient treatment of municipal wastewater.However,dissolved methane in anaerobic effluent appears to be a barrier towards the energy and carbon neutrality of wastewater treatment.Although several dissolved methane recovery methods have been developed,their engineering feasibility and economic viability have not yet been assessed in a holistic manner.In this perspective,we thus intend to offer additional insights into the cost-benefit of dissolved methane recovery against its emission.展开更多
Eleven stations were occupied in the Tokyo-wan during a study on the distribution of methane in this eu trophic coastal environment in August of 1993. The principal features of the Observed methane included the follow...Eleven stations were occupied in the Tokyo-wan during a study on the distribution of methane in this eu trophic coastal environment in August of 1993. The principal features of the Observed methane included the following 6points: (1)Excess methane in the surface layer from 1. 5 times to greater than 25 times solubility equilibrium with the at mosphere. (2)The methane concentration in the upper ￣er displayed a maximum zone around Saution 5 and the secondhashest in bottom water at StationS 1 and 2, probably because there was the front resulting from the chemical processes.(3)Correlations between methane and other parameters exhibited correspondences and the methane distribution beingmainly controlled by physical processes. (4)In some stations, vertical profiles revealed associations between methane andChl a and the relationships between methane with Chl a or nitrite have shown good linear correlations. It is postulated thatsome methane is formed in situ (5)The calculated flux of methane across the air-sea interface was about 71 μmol/(m2· d). (6)Some methane might be produced along with the organic matter decomposition in bottom water. Others mightbe due to the methane fluxes into the bottom water from the anoxic sediment inside the bay, which are believed to be themain methane source.展开更多
文摘Various anaerobic processes have been explored for the energy-efficient treatment of municipal wastewater.However,dissolved methane in anaerobic effluent appears to be a barrier towards the energy and carbon neutrality of wastewater treatment.Although several dissolved methane recovery methods have been developed,their engineering feasibility and economic viability have not yet been assessed in a holistic manner.In this perspective,we thus intend to offer additional insights into the cost-benefit of dissolved methane recovery against its emission.
文摘Eleven stations were occupied in the Tokyo-wan during a study on the distribution of methane in this eu trophic coastal environment in August of 1993. The principal features of the Observed methane included the following 6points: (1)Excess methane in the surface layer from 1. 5 times to greater than 25 times solubility equilibrium with the at mosphere. (2)The methane concentration in the upper ￣er displayed a maximum zone around Saution 5 and the secondhashest in bottom water at StationS 1 and 2, probably because there was the front resulting from the chemical processes.(3)Correlations between methane and other parameters exhibited correspondences and the methane distribution beingmainly controlled by physical processes. (4)In some stations, vertical profiles revealed associations between methane andChl a and the relationships between methane with Chl a or nitrite have shown good linear correlations. It is postulated thatsome methane is formed in situ (5)The calculated flux of methane across the air-sea interface was about 71 μmol/(m2· d). (6)Some methane might be produced along with the organic matter decomposition in bottom water. Others mightbe due to the methane fluxes into the bottom water from the anoxic sediment inside the bay, which are believed to be themain methane source.
