文章实验采用产酸相中温产甲烷相高温两相发酵工艺,逐步提高系统中有机负荷,以此研究产甲烷相中氨氮浓度的变化规律及其影响。结果表明:氨氮浓度随有机负荷的提高而增大,当有机负荷提高到7.3 g VS·L-1d-1时,氨氮浓度上升到5386 mg&...文章实验采用产酸相中温产甲烷相高温两相发酵工艺,逐步提高系统中有机负荷,以此研究产甲烷相中氨氮浓度的变化规律及其影响。结果表明:氨氮浓度随有机负荷的提高而增大,当有机负荷提高到7.3 g VS·L-1d-1时,氨氮浓度上升到5386 mg·L-1,容积产气率最高达4.1 L·L-1d-1,系统运行良好;当有机负荷达到7.7 g VS·L-1d-1时,氨氮浓度达到6144 mg·L-1,系统出现氨氮抑制;抑制解除后,系统可在有机负荷为3.4 g VS·L-1d-1,氨氮浓度为4586 mg·L-1的条件下稳定运行,容积产气率达到2.5 L·L-1d-1。实验结果还显示:在高浓度氨氮条件下可强化乙酸的代谢,但对丙酸和丁酸的效果不明显。展开更多
Conversion of green house CO2 into fuel gas in the presence of reducing agent sources that are Fe and Zn powder, as well as hydrogen ions supplier such as nitric and acetic acids by photo catalytic reduction with wate...Conversion of green house CO2 into fuel gas in the presence of reducing agent sources that are Fe and Zn powder, as well as hydrogen ions supplier such as nitric and acetic acids by photo catalytic reduction with water vapor on TiO2 has been studied. The photo reduction was carried out by batch technique, using a UV lamp with a wave length of 290-400 nm, as a photon source. The gasses produced from the photo reduction were determined by gas chromatography. The research results indicate that the photo reduction of CO2 has successfully produced methane as a dominant product. The presence of the metals in addition to be able to improve the methane yield, it is also able to induce ethylene formation. Meanwhile the acids can considerably enhance the methane yield without formation of ethylene. Furthermore, the enhancement is observed to be controlled by mass of the metals, and the acid concentrations. It is also found that Zn and HNO3 show stronger effect in the increasing CO2 photo reduction.展开更多
文摘文章实验采用产酸相中温产甲烷相高温两相发酵工艺,逐步提高系统中有机负荷,以此研究产甲烷相中氨氮浓度的变化规律及其影响。结果表明:氨氮浓度随有机负荷的提高而增大,当有机负荷提高到7.3 g VS·L-1d-1时,氨氮浓度上升到5386 mg·L-1,容积产气率最高达4.1 L·L-1d-1,系统运行良好;当有机负荷达到7.7 g VS·L-1d-1时,氨氮浓度达到6144 mg·L-1,系统出现氨氮抑制;抑制解除后,系统可在有机负荷为3.4 g VS·L-1d-1,氨氮浓度为4586 mg·L-1的条件下稳定运行,容积产气率达到2.5 L·L-1d-1。实验结果还显示:在高浓度氨氮条件下可强化乙酸的代谢,但对丙酸和丁酸的效果不明显。
文摘Conversion of green house CO2 into fuel gas in the presence of reducing agent sources that are Fe and Zn powder, as well as hydrogen ions supplier such as nitric and acetic acids by photo catalytic reduction with water vapor on TiO2 has been studied. The photo reduction was carried out by batch technique, using a UV lamp with a wave length of 290-400 nm, as a photon source. The gasses produced from the photo reduction were determined by gas chromatography. The research results indicate that the photo reduction of CO2 has successfully produced methane as a dominant product. The presence of the metals in addition to be able to improve the methane yield, it is also able to induce ethylene formation. Meanwhile the acids can considerably enhance the methane yield without formation of ethylene. Furthermore, the enhancement is observed to be controlled by mass of the metals, and the acid concentrations. It is also found that Zn and HNO3 show stronger effect in the increasing CO2 photo reduction.
