Forest ecosystems may provide strong sources of nitrous oxide (N2O), which is important for atmospheric chemical and radiative properties. Nonetheless, our understanding of controls on forest N2O emissions is insufficient to narrow current flux estimates, which still are associated with great uncertainties. In this study, we have investigated the quantitative and qualitative relationships betwe...

In an attempt to reduce the threat of global warming, it has been proposed that the rise of atmospheric carbon dioxide concentrations be reduced by the ocean disposal of CO2 from the flue gases of fossil fuel-fired power plants. The release of large amounts of CO2 into mid or deep ocean waters will result in large plumes of acidified seawater with pH values ranging from 6 to 8. In an effort to ...

A membrane aerated biofilm reactor (MABR), in which O(2) was supplied from the bottom of the biofilm and NH(4)(+) and organic carbon were supplied from the biofilm surface, was operated at different organic carbon loading rates and intra-membrane air pressures to investigate the occurrence of simultaneous chemical oxygen demand (COD) removal, nitrification and denitrification. The spatial distr...

Nomenclature: SO2 dissolved oxygen, SS readily biodegradable substrate, SNH4 ammonium nitrogen, NH4+-N, SNO2 nitrite nitrogen, NO2−-N, SNO3 nitrate, NO3−-N, SN2 dinitrogen, N2, XNH aerobic ammonium oxidizers, XNO aerobic nitrite oxidizers, XAN Anammox bacteria, XH hetertrophic organisms, X inert particulate organic material, YNH yield coefficient of XNH, YNO yield coefficient of XNO, YAN yield ...

In this study, a photo-baffled reactor was operated to assess the performance of microalgal-nitrifying bacteria consortia in treating ammonia with its input concentration up 180 mg-N·L−1. The six-compartment reactor, total effective volume 3.2 L, run continuously for 350 days at 30 °C. Overall, 66 ± 11% removed nitrogen loading rate 0.083 0.011 kg-N·m−3·day−1. addition, long-term, stable partia...

This study examined the performances of Acorus calamus, Pontederia cordata, and Alisma plantagoaquatica in removing nitrogen (N) from farmland wastewater. P. cordata showed fastest rate N removal, followed by A. plantagoaquatica, whereas that calamus was slowest. achieving a greater TN reduction soil than calamus. demonstrated highest adsorption capacity, 32.6% 392.1% higher respectively. The p...