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【Objective】 This paper presents a new ultrasonic water meter for use in farmland irrigation management. It is waterproof, efficient and weather resistance. 【Method】 We study the modified materials of ultrasonic water meter transducer and the sealing structure by combining material modification with new water meter structure design. 【Result】 ①Using the adjustable angle transducer structure and the smooth inner cavity, the flow is stable. It reduces the impact of scaling at the bottom of the meter on the accuracy of the ultrasonic water meter and adapts to different installation conditions. ②A mechanical sealing structure is designed to resolve the problem that data measured from the traditional glue-sealed water meter is less repeatable for maintenance and utilization. It improves the service life, pressure stability and sealing performance of the water meter. ③The length of the ultrasonic water meter is significantly reduced by using the 80 mm short tube. Glass fiber plus nylon 66 process formula plasticizing production can greatly reduce the weight of the water meter, improve its weathering-resistance and production efficiency. 【Conclusion】 A new type of ultrasonic water meter with improved structure and material was developed. According to the “Drinking cold water Meter and hot Water Meter” standard (GB/T 778.4—2018), the accuracy of the water meter reached Level 1. It improves the reliability, weathering-resistance, installation convenience, while reducing production costs, both at significant level.

Despite growing attention has been paid to waste material gasification for high-efficiency energy conversion, the application of gasification technology in meat waste management is still limited. To fill this gap, this study designed two systems which evaluated the potential of using gasification technology to manage the poultry waste that has been exposed to highly pathogenic avian influenza (HPAI). Two systems are simulated by using Aspen plus combined with a one-dimensional kinetics control gasification model, and wood or dried poultry is selected as the feedstock for the gasifier. The results show that the energy efficiency of the poultry drying system (wood gasification) is 14.5%, which is 12% lower than that of the poultry gasification system when the poultry energy is accounted as energy input. Even though the economic analysis indicates the poultry elimination cost of the poultry gasification system is only 30 $/tonne lower than the poultry drying system, taking the absence of dried poultry burial into consideration, the poultry gasification system has development potentials. The sensitivity analysis shows that labor fee and variable factor has larger effects on the poultry elimination cost, while the uncertainty analysis determines the uncertainty level of the economic analysis results. [ABSTRACT FROM AUTHOR]