Influence of micro/nanobubbles on clogging in drip irrigation systems

Li, Hao; Li, Hong; Qi-biao, Han; Huang, Xiuqiao; Jiang, Yue; Sun, Hang; Li, Hui

doi:10.1039/d0ra07782h

Cited by 11 publications

(8 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It can be seen from Fig. 8 that aeration improves the anti-clogging performance of the emitter, which is consistent with (Li et al 2020). The numerical simulation results show that the aeration increases the area of the high-speed mainstream area of the emitter, improves the carrying capacity of the suspended particles, and reduces the deposition probability of the suspended particles in the lowspeed area because the gas lls the low-speed area.…”

Section: Discussionsupporting

confidence: 85%

Effects of aeration on hydraulic and anti-clogging performance of subsurface drip irrigation emitters

Wang,

liu,

Zhang

et al. 2023

Preprint

View full text Add to dashboard Cite

The hydraulic and anti-clogging performance of drip irrigation emitters are crucial factors that determine irrigation quality. Subsurface aerated drip irrigation (SADI) has been shown to enhance plant growth and yield, but further investigation is needed to understand its effects on the hydraulic and anti-clogging performance of drip emitters. Thus, based on hydraulic performance tests, the flow rate of emitters was tested under various design nominal discharges (1.0, 1.35, 2.3 L·h-1), working heads (2, 4, 6, 8, 10, 12 m), aeration amounts (0, 0.3, 0.5, 0.7, 0.9 L·min-1) and soil depths (0, 15 cm). In addition, the influence of nominal discharges (ND), working heads (WH), aeration amounts (AA), and soil depths (SD) on the flow rate as well as the flow index were analyzed. Moreover, the relative discharge of emitters was tested by short-term clogging tests, and the influence of aeration on the anti-clogging performance of the emitter was analyzed. A three-phase flow simulation method, based on one-phase flow and two-phase flow, was employed to investigate the variations in velocity, gas concentration distribution, particle passing rate, and concentration distribution of particles in the flow channel after aeration. The results demonstrate that the effects of ND, WH, AA and SD on the flow rate of the emitter were extremely significant(P < 0.01). The influence of ND and SD on the flow index was significant (P < 0.05), while the influence of AA on the flow index was not significant(P > 0.05). In addition, the negative impact of subsurface outflow on the emitter under high-pressure conditions (10, 12 m) was significantly less than that under low-pressure conditions (2, 4 m). After aeration, the number of muddy water irrigation times increased, and the growth rates of high-speed mainstream areas after E1, E2, and E3 are 3%-10%, 20%-46%, and 7%-17%, respectively. The particle passing rates of E1, E2 and E3 increased by 10%, 9% and 4%, respectively. This study can provide a research basis for promoting and using subsurface aerated irrigation.

show abstract

Section: Discussionsupporting

confidence: 85%

Effects of aeration on hydraulic and anti-clogging performance of subsurface drip irrigation emitters

Wang,

liu,

Zhang

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…The performance of the emitter serves as a significant factor among others that affect the overall performance of the drip irrigation system [32]. The experimental outcome demonstrates that the mean change of flow ratio (Dra) and Christiansen uniformity coefficient (C u ) of drip irrigation system under the three feeding methods gradually decreased with the increase in the experimental time, which was consistent with the research results of Zhou Bo [33] and Li [21]. The decreasing trend of Dra of VAI and UVI is basically the same in the whole experiment period, which is higher than that of UVI only in the early stage of irrigation.…”

Section: Effects Of Aeration On Microbial Community Diversitysupporting

confidence: 85%

“…However, the clogging problem of the nozzle serves as the significant indexes among others restricting further development of drip irrigation technology. Based on the research of Li et al (2020), the use of aerated irrigation can delay the blockage of the emitter [21], which offers a new solution to the problem of the blockage of the emitter. However, that mechanism of the influence of aerated irrigation on the blockage of the emitter is still unclear and needs to be further studied.…”

Section: Introductionmentioning

confidence: 99%

Effect of Aeration on Blockage Regularity and Microbial Diversity of Blockage Substance in Drip Irrigation Emitter

et al. 2022

Agriculture

Self Cite

View full text Add to dashboard Cite

Aerated drip irrigation is rendered as a new water-saving irrigation method based on drip irrigation technology, which is endowed with the function of effectively alleviating the problem of rhizosphere hypoxia in crop soil, enhancing the utilization rate of water and fertilizer; as a result, it improves the harvest and quality of crops. However, clogged emitters are important indexes, among others, that pose an influence to the service effect and life duration of drip irrigation systems. At present, the working principle and mechanism of the influence of air feeding on the blockage of drip irrigation emitters remain unclear. Therefore, based on the two gas filling methods of the micro/nano bubble generator and Venturi injector, the dynamic change process for the average flow ratio of an air-filled drip irrigation emitter was studied by the method of emitter plugging test. 16S rRNA sequencing was used to analyze the microbial diversity of the emitter plugs. The results show that the air injection can pose influence on the clogging procedure of drip irrigation emitters, and more importantly, it makes the distribution of blocked emitters more uniform, thus improving the uniformity of the system. Different filling methods have different effects on the blockage of the emitter. Among them, the blockage time of drip irrigation system under the micro/nano aerated drip irrigation (MAI) mode is 5.73 times longer than that under unaerated drip irrigation (UVI), and similarly, Venturi gas drip irrigation (VAI) is close to that under UVI. The filling method changed the microbial diversity of the blockage in the emitter. Among them, the number of operational taxonomic unit (OTU) unique to MAI was 2.1 times that of UVI, and the number of OTU unique to VAI was 1.3 times that of UVI. Meanwhile, gas addition will inhibit the growth of Nitrospirae and Proteobacteria microbial communities and promote the growth of Firmicutes and Actinobacteria microbial communities. Furthermore, the increase in microbial extracellular polymer in the plugging material of the emitter was inhibited and the plugging process of the emitter was slowed down. The research results are of great significance in the disclosure of the clogging mechanism of drip irrigation emitter and constructing the green, anti-blockage technology of aerated drip irrigation.

show abstract

“…By creating a favorable environment for soil microbial communities in the crop's root zone [6,7], it ultimately accomplishes the objectives of water conservation, increased yields, and improved quality [8][9][10][11]. At the same time, the co-application of water, fertilizer, and air also has a significant inhibitory effect on the clogging process of drip irrigation emitters, which can extend the service life of drip irrigation systems [12,13].…”

Section: Introductionmentioning

confidence: 99%

Performance of a Drip Irrigation System under the Co-Application of Water, Fertilizer, and Air

Li,

Ma,

Zhang

et al. 2023

Horticulturae

Self Cite

View full text Add to dashboard Cite

The co-application of water, fertilizer, and air is a new water-saving irrigation method based on drip irrigation technology, which can effectively alleviate the phenomenon of soil rhizosphere hypoxia, improve water and fertilizer utilization efficiency, and inhibit the clogging of irrigation equipment in drip irrigation systems. The performance of drip irrigation systems is one of the important factors affecting the effectiveness of the co-application of water, fertilizer, and air. However, the impact of factors such as the aeration method, fertilization device, and working parameters on the performance of drip irrigation systems for the co-application of water, fertilizer, and air is still unclear. Therefore, based on two typical aeration methods, i.e., micro-nano and Venturi aeration, the performance of a drip irrigation system under the co-application of water, fertilizer, and air was studied by comparing and analyzing the effects of different aeration methods, working pressures of the drip irrigation system, and the pressure difference between the inlet and outlet of fertilizer irrigation on the spatial distribution uniformity of water, fertilizer, and air in the drip irrigation pipeline network. The results showed that the pressure difference between the inlet and outlet of fertilization irrigation had no significant impact on system performance, while the working pressure significantly affected system performance. Compared with the effective effect of Venturi aeration on system performance, micro-nano aeration can significantly affect drip irrigation system performance and effectively improve drip irrigation system performance. The micro-nano-aerated drip irrigation system with the co-application of water, fertilizer, and air under a working pressure of 0.1 MPa has better system performance. The research results are of great significance for revealing the mechanism underlying the impact of the co-application of water, fertilizer, and air on the performance of drip irrigation systems and constructing efficient drip irrigation technology for the co-application of water, fertilizer, and air.

show abstract

Influence of micro/nanobubbles on clogging in drip irrigation systems

Abstract: Drip emitter clogging is closely related to the presence of particulate matter, nutrients, organic matter and microorganisms in irrigation water and severely restricts the performance, service life and popularization of drip irrigation systems.

Cited by 11 publications

References 31 publications

Effects of aeration on hydraulic and anti-clogging performance of subsurface drip irrigation emitters

Effects of aeration on hydraulic and anti-clogging performance of subsurface drip irrigation emitters

Effect of Aeration on Blockage Regularity and Microbial Diversity of Blockage Substance in Drip Irrigation Emitter

Performance of a Drip Irrigation System under the Co-Application of Water, Fertilizer, and Air

Contact Info

Product

Resources

About