Effects of hydraulic load on pollutant distribution and grassland purification efficiency in rural domestic sewage utilization

Su Chuangjian; Wang Dayang; Shu Yan; Yu Zhenjiang; Chen Zhihua; Pan Zhendong; Lin Zhangwen

doi:10.13961/j.cnki.stbctb.2025.01.001

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Effects of hydraulic load on pollutant distribution and grassland purification efficiency in rural domestic sewage utilization

- Effects of hydraulic load on pollutant distribution and grassland purification efficiency in rural domestic sewage utilization
- Bulletin of Soiland Water Conservation Vol. 45, Issue 1, Pages: 1-9(2025)
- 作者机构：
  
  1. 广东省环境科学研究院,广东,广州,510000
  2. 广州市增城排水有限公司,广东,广州,511300
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2025.01.001
  CLC： X52;X799.3
- Published：2025
- 稿件说明：
移动端阅览
Su Chuangjian, Wang Dayang, Shu Yan, et al. Effects of hydraulic load on pollutant distribution and grassland purification efficiency in rural domestic sewage utilization[J]. Bulletin of Soiland Water Conservation, 2025, 45(1): 1-9.
DOI：

Su Chuangjian, Wang Dayang, Shu Yan, et al. Effects of hydraulic load on pollutant distribution and grassland purification efficiency in rural domestic sewage utilization[J]. Bulletin of Soiland Water Conservation, 2025, 45(1): 1-9. DOI： 10.13961/j.cnki.stbctb.2025.01.001.

摘要

[目的

]

探究草地消纳利用农村生活污水过程中污染物分布规律，为农村生活污水资源化利用的风险防控提供科学参考。[方法

]

考察草地消纳利用农村生活污水过程中水力负荷对土壤溶液和土壤污染物分布的影响，分析不同深度土壤溶液和土壤污染物变化规律，并进一步通过Pearson相关系数探讨水力负荷与土壤溶液和土壤污染物之间的关联性及影响程度。[结果

]

①随着水力负荷由0.005 m

/(m

·d)逐渐增加至0.05 m

/(m

·d)，草地中出现NH

-N和NO

-N富集现象，而且NO

-N反硝化性能不佳是制约草地脱氮速率的限速步骤。②水力负荷与土壤NH

-N含量之间具有良好的正相关性，相关性系数高达0.94。[结论

]

草地消纳利用农村生活污水过程中应合理分配水力负荷，做好环境风险管控。

Abstract

[Objective] The pollutants distribution during grassland digestion and utilization of rural domestic sewage was explored in order to provide a scientific reference for risk prevention and control in the resource utilization of rural domestic sewage. [Methods] This study investigated the effects of hydraulic load on soil solution and soil pollutant distribution during the grassland digestion and utilization of rural domestic sewage. It also analyzed the variations in soil solution and soil pollutants at different depths and explored the correlation among hydraulic load

soil solution

adn soil pollutants using the Pearson correlation coefficient. [Results] ① As the hydraulic load increased gradually from 0.005 m3/(m2·d) to 0.05 m3/(m2·d)

an accumulation of NH+4-N and NO-3-N was observed in the grassland. The poor denitrification performance of NO-3-N was identified as the limiting step restricting the denitrification rate of the grassland. ② The hydraulic load showed a strong positive correlation with the NH+4-N content in the soil

with a correlation coefficient of 0.94. [Conclusion] During the grassland digestion and utilization of rural domestic sewage

it is necessary to distribute the hydraulic load rationally and control the environmental risks.

关键词

Keywords

references

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