Effect of Particle Sizes on Flow Fields and Biofilm Morphological Structures in Bioretention Cells

Wang Jinxi; Wang Yajun; Zhou Yuqin

doi:10.13961/j.cnki.stbctb.20200927.002

您当前的位置：

首页 >

文章列表页 >

Effect of Particle Sizes on Flow Fields and Biofilm Morphological Structures in Bioretention Cells

- Effect of Particle Sizes on Flow Fields and Biofilm Morphological Structures in Bioretention Cells
- Bulletin of Soiland Water Conservation Vol. 40, Issue 5, Pages: 134-140(2020)
- 作者机构：
  
  1. 兰州文理学院化工学院,甘肃,兰州,730000
  2. 兰州理工大学土木工程学院,甘肃,兰州,730050
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.20200927.002
  CLC： X502;X703
- Published：2020
- 稿件说明：
移动端阅览
Wang Jinxi, Wang Yajun, Zhou Yuqin. Effect of Particle Sizes on Flow Fields and Biofilm Morphological Structures in Bioretention Cells[J]. Bulletin of Soiland Water Conservation, 2020, 40(5): 134-140.
DOI：

Wang Jinxi, Wang Yajun, Zhou Yuqin. Effect of Particle Sizes on Flow Fields and Biofilm Morphological Structures in Bioretention Cells[J]. Bulletin of Soiland Water Conservation, 2020, 40(5): 134-140. DOI： 10.13961/j.cnki.stbctb.20200927.002.

摘要

[目的] 分析填料粒径对生物滞留池（BRC）渗透性能及微生物膜形态的作用机理，以期优选出适合生物滞留池填料层的颗粒粒径及相应填充的孔隙率。[方法] 采用数值模拟和试验实测相结合的方法，利用Fluent软件对BRC小尺度计算区域范围内的流场形态进行模拟，对6种粒径（0.5，1.0，2.0，4.0，6.0，8.0 mm）下的流线图、压力分布及变化图进行综合对比分析。为验证模拟结果的正确性，对不同颗粒粒径进行生物膜培养和运行，测定颗粒表面生物膜厚度。[结果] 平均粒径为0.5~1.0 mm时流场形态最好，可形成结构合理数量较多的小涡流，有利于水流渗透及物质传递的进行，实测生物膜也表明粒径为1.0 mm时，微生物膜生长最为均匀且生物量最大。[结论] 填料的粒径会影响BRC的运行效果，数值模拟可为实际粒径的选取提供参考。

Abstract

[Objective] The effect mechanism of packing particle sizes on the permeability of bioretention cells (BRC) and biofilm patterns was analyzed in order to optimize the particle size and corresponding filling porosity of the BRC packing layer.[Methods] By numerical simulation and experimental measurement methods

fluent software was employed to simulate and analyze the flow field pattern of BRC in the small-scale calculation zone. The streamline diagram

pressure distribution

and change diagram for six different sizes of granule particles (0.5

1.0

2.0

4.0

6.0

and 8.0 mm) were comprehensively compared. In order to verify the correctness of the simulation results

biofilms with different particle sizes were cultured and operated. The thickness of the biofilm on the particle surface was measured.[Results] When the average particle sizes were 0.5—1.0 mm

the flow field pattern was the best and a smaller eddy current with reasonable structure could be formed. This flow field was the most conducive to water infiltration and material transfer. The measured thickness of the biofilm also showed that when the particle size was 1.0 mm

the growth of the biofilm was the most uniform and the biomass was the largest.[Conclusion] The packing particle size will affect the operation effects of the BRC

and the numerical simulation can provide a reference selection of actual particle sizes in the BRC.

关键词

Keywords

references

Le Coustumer S, Fletcher T D, Deletic A, et al. The influence of design parameters on clogging of stormwater biofilters:A large-scale column study[J]. Water Research, 2012,46(20):6743-6752.

Read J, Wevill T, Fletcher T, et al. Variation among plant species in pollutant removal from stormwater in biofiltration systems[J]. Water Research, 2008,42(4/5):893-902.

Kandra H S, Deletic A, Mc Carthy D. Assessment of impact of filter design variables on clogging in stormwater filters[J]. Water Resources Management, 2014,28(7):1873-1885.

Blecken G T, Zinger Y, Deletic A, et al. Laboratory study on stormwater biofiltration:Nutrient and sediment removal in cold temperatures[J]. Journal of Hydrology, 2010,394(3/4):507-514.

Kandra H, Mc Carthy D, Deletic A. Assessment of the impact of stormwater characteristics on clogging in stormwater filters[J]. Water Resources Management, 2015,29(4):1031-1048.

Yong C, Mc Carthy D T, Deletic A. Predicting physical clogging of porous and permeable pavements[J]. Journal of Hydrology, 2013,481:48-55.

Gresch M, Armbruster M, Braun D,et al. Effects of aeration patterns on the flow field in wastewater aeration tanks[J]. Water Research, 2011,45(2):810-818.

孔德川,丁爱中,郑蕾,等. 分层式潜流人工湿地水力学特性数值模拟与分析[J]. 环境工程学报,2011,5(4):741-744.

王丽,王丽杰,王琳,等. 滤料粒径对BAF小尺度下流场形态及挂膜速度的影响[J]. 环境科学学报,2015,35(5):1426-1434.

De Boer R, Didwania A K. Two-phase flow and the capillarity phenomenon in porous solids:A continuum thermomechanical approach[J]. Transport in Porous Media, 2004,56(2):137-170.

张凯,王瑞金,吴立军. Fluent技术基础与应用实例(第2版)[M].北京:清华大学出版社,2010.

Payne E G I, Hatt B E, Deletic A, et al. Adoption Guidelines for Stormwater Biofiltration Systems[M]. Melbourne, Australia:Cooperative Research Centre for Water Sensitive Cities, 2015.

Nam J H, Kaviany M. Effective diffusivity and water-saturation distribution in single-and two-layer PEMFC diffusion medium[J]. International Journal of Heat and Mass Transfer, 2003,46(24):4595-4611.

Zhang Yuwen, Peng X, Conte I. Heat and mass transfer with condensation in non-saturated porous media[J]. Numerical Heat Transfer Part A-applications, 2007,52(12):1081-1100.

Views

782

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Impacts of climate， land use and ecological governance on water ecosystem services in Haihe River basin

Effectiveness evaluation of ecological product value realization in northwest China——An analysis of 29 typical cases

Spatiotemporal heterogeneity of ecosystem service value in typical estuarine deltas of China

Regional characteristics of soil moisture and nutrients under artificial forests in typical loess regions

Runoff and sediment yield characteristics of typical soil slopes in Xin’an River basin under different rainfall intensities and slope gradients

Related Author

No data

Related Institution

No data

⁰