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Application of anti-clogging Ecological Soil Sewage Treatment Process in Rural Domestic Sewage Treatment and Prospects

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Agricultural Biotechnology 2023年第3期12卷 95-96页

作者： Xingyu QI Qiuxia TAN Wuhan Jiangcheng Zeyuan Ecological Engineering Technology Co. Ltd.Wuhan 430000China Wuhan Kunjian Eco-Environmental Planning&Design Co. Ltd.Wuhan 430000China

[Objectives] By reasonable water distribution and air supply to soil, soil water permeability is maintained, and the nutrient conditions of degrading bacteria in soil are improved to effectively prevent soil clogging. [Methods] Through the innovation and improvement of traditional soil sewage treatment technology, the physical, chemical and biological characteristics of soil for sewage purification are utilized to enhance the pollutant decomposition ability of soil microorganisms and maintain soil water permeability.[Results] It has no secondary pollution, and can effectively remove pollutants such as COD_(Cr), TN, TP, NH_3-N, etc. in sewage. [Conclusions] The operation and maintenance cost is low, and the land can be reused, while water and nutrients can be restored to the land.

关键词： anti-clogging Ecological soil sewage treatment Pollutants

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Flow Behaviour Analysis and Experimental Investigation for Emitter Micro-channels

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Chinese Journal of Mechanical Engineering 2012年第4期25卷 729-737页

作者： WEI Zhengying CAO Meng LIU Xia TANG Yiping LU Bingheng State Key Lab for Manufacturing System Engineering Xi 'an Jiaotong University Xi 'an 710049 China

The existing research of the flow behavior in emitter micro-channels mainly focuses on the single-phase flow *** the recent micro-particle image velocimetry（PIV） experimental research on the flow characteristics in various micro-channels mainly focuses on the single-phase fluid ***,using an original-size emitter prototype to perform the experiments on the two-phase flow characteristics of the labyrinth channels is seldom *** this paper,the practical flow of water,mixed with sand escaped from filtering,in the labyrinth channel,is *** some research work on the clogging mechanism of the labyrinth channel＇s structure is *** fluid dynamics（CFD） analysis has been performed on liquid-solid two-phase flow in labyrinth-channel *** on flow visualization technology-micro-PIV,the flow in labyrinth channel has been photographed and *** path line graph and velocity vector graph are obtained through the post-treatment of experimental *** graphs agree well with CFD analysis results,so CFD analysis can be used in optimal design of labyrinth-channel *** the optimized anti-clogging structures of the rectangular channel and zigzag channel have been designed *** CFD numerical simulation and the micro-PIV experiments analysis on labyrinth-channel emitter,make the ＂black box＂ of the flow behavior in the emitter channel ***,the proposed research promotes an advanced method to evaluate the emitter＇s performance and can be used to conducting the optimal design of the labyrinth-channel emitters.

关键词： drip irrigation emitter labyrinth channel two-phase flow analysis anti-clogging micro-PIV

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Design of an active seed throwing and cleaning unit for pneumatic rice seed metering device

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International Journal of Agricultural and Biological Engineering 2018年第2期11卷 62-69页

作者： He Xing Zaiman Wang Xiwen Luo Ying Zang Wenwu Yang Minghua Zhang Yuexin Ma Key Laboratory of Key Technology on Agricultural Machine and Equipment Ministry of EducationSouth China Agricultural UniversityGuangzhou 510642China College of Engineering South China Agricultural UniversityGuangzhou 510642China

To address the clogging of the rice seed metering device after a long period of operation without affecting the precision of normal seeding,an active seed throwing and cleaning unit was designed based on the fact that magnets of the same pole were mutually *** working principle of the two devices was analysed theoretically,and a mechanical model was created according to the relationship between the repulsion forces of magnets and the spring forces of *** super hybrid rice Y-2 You 900 with 22.5%moisture content(wet basis)was used as the test *** whole factor experiments were carried out under different negative pressures,rotational speeds of the suction plates,and lengths of *** results indicated that under any test conditions,the active seed throwing and cleaning unit worked *** results of high-speed photography showed that the rate of seed cleaning was 100%.The results also showed that the optimal negative pressure was 0.8 *** probability of 1-3 seeds per hill for the seed metering device was approximately 95%under the optimal negative *** optimal length of the probe was found to be 2 *** average qualified rate of hill space was 96.04%under the optimal length of probe,the longer the length of the probe,the lower the qualified rate of hill *** also showed that an active seed throwing and cleaning unit could effectively avoid the hole clogging caused by the long-term operation and had no influence on the normal operation of the pneumatic rice seed metering *** active seed throwing and cleaning unit improved the stability of the seed metering device,and the research provided a reference for the optimal design of seed throwing and cleaning structures of the pneumatic rice seed metering device.

关键词： agricultural machinery seed metering device seed cleaning anti-clogging pneumatic seed metering precision seeder

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