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Copyright of Science Technology & Engineering is the property of Chinese Society of Technology Economics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Materiae Compositae Sinica is the property of Acta Materiea Compositae Sinica Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Hydrobiology is the property of Editorial Department of Journal of Hydrobiology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Materiae Compositae Sinica is the property of Acta Materiea Compositae Sinica Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Dalian Ocean University is the property of Journal of Dalian Ocean University Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Hydrobiology is the property of Editorial Department of Journal of Hydrobiology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The research status of nanofiltration technology to remove nitrate in water environment is reviewed. The mechanism of nitrate removal by nanofiltration membrane (including Donan effect, dielectric effect and steric hindrance effect） is introduced in detail, and the formation principle of its rejection mechanism is introduced. It focuses on the influencing factors of nanofiltration membrane in the process of nitrate rejection (nanofiltration membrane itself, pressure, temperature, salt concentration, pH and magnetic field, etc.） and analyzes in detail each influencing factor in the process of nitrate rejection by nanofiltration membrane. Finally, the retention mechanism and influencing factors of nanofiltration membranes are summarized. [ABSTRACT FROM AUTHOR]

The domestic nanofiltration membrane is used to remove nitrate ions in the water environment, and the factors affecting the retention performance and flux of the nanofiltration membrane，such as the concentration of the inlet liquid? the flow of concentrated water, the pressure? and the temperature are studied・ The results show that the increase in pressure is beneficial to increase the rejection rate and prod・ net water flux of the nanofiltration membrane, the optimal pressure is 0.7 MPa, and the rejection rate and product water flux can reach 75. 0% and 153.7 L/(m2 • h) ;Properly increasing the inlet water temperature can increase the rejection rate of the nanofiltration process, the best inlet water temperature is 39 ・ 3 °C ・ The feed concentration has a significant impact on the rejection process, the lower the feed concentration, the better the retention effect of the nanofiltration membrane. [ABSTRACT FROM AUTHOR]

Copyright of Applied Chemical Industry is the property of Shaanxi Research Design Insitute of Petroleum & Chemical Industry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The sources and characteristics of vegetable waste were discussed in the present study. The technical features, advantages, and disadvantages of different vegetable waste resource utilization modes, including aerobic composting of vegetable waste, association between "waste-fodder-fertilizer" and "waste-worm-fodder-fertilizer" planting and breeding, "waste-biochar-fertilizer" returning and soil amelioration, "waste-biogas-fertilizer" energy utilization, and "waste-mushroom-fertilizer" integrated utilization modes were analyzed. Furthermore, the limiting factors and development directions of the full utilization of vegetable waste were discussed. These can be provide a scientific basis for resource utilization of vegetable waste in China. [ABSTRACT FROM AUTHOR]