Nitrogen and Organics Removal during Riverbank Filtration along a Reclaimed Water Restored River in Beijing, China

Pan, Weiyan; Huang, Quanzhong

doi:10.3390/w10040491

Cited by 26 publications

(12 citation statements)

References 50 publications

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“…+ -N and NO 3 --N) from river water, particularly when water flows through the river-bed and groundwater aquifer to the pumping wells [22][23][24][25]. The performance of riverbank filtration in purification of water varies from one region to another because the contaminant removal efficiency of this filtration system depends on the local hydrogeology of aquifers, properties of unsaturated and saturated aquifers, climatic conditions, temperature and river water quality [41]. Other factors that affect the removal efficiency of organic and inorganic pollutants from river water are the redox chemistry, content of organic matter and biogeochemistry of riverbed sediments [42][43][44].…”

Section: Riverbank Filtrationmentioning

confidence: 99%

Remediation of Polluted River Water by Biological, Chemical, Ecological and Engineering Processes

Anawar

Chowdhury

2020

Sustainability

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Selection of appropriate river water treatment methods is important for the restoration of river ecosystems. An in-depth review of different river water treatment technologies has been carried out in this study. Among the physical-engineering processes, aeration is an effective, sustainable and popular technique which increases microbial activity and degrades organic pollutants. Other engineering techniques (water diversion, mechanical algae removal, hydraulic structures and dredging) are effective as well, but they are cost intensive and detrimental to river ecosystems. Riverbank filtration is a natural, slow and self-sustainable process which does not pose any adverse effects. Chemical treatments are criticised for their short-term solution, high cost and potential for secondary pollution. Ecological engineering-based techniques are preferable due to their high economic, environmental and ecological benefits, their ease of maintenance and the fact that they are free from secondary pollution. Constructed wetlands, microbial dosing, ecological floating beds and biofilms technologies are the most widely applicable ecological techniques, although some variabilities are observed in their performances. Constructed wetlands perform well under low hydraulic and pollutant loads. Sequential constructed wetland floating bed systems can overcome this limitation. Ecological floating beds are highly recommended for their low cost, high effectiveness and optimum plant growth facilities.

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Section: Riverbank Filtrationmentioning

confidence: 99%

Remediation of Polluted River Water by Biological, Chemical, Ecological and Engineering Processes

Anawar

Chowdhury

2020

Sustainability

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“…Successfully reclaimed water acquired after physical, chemical and biological treatments of domestic wastewater or municipal sewage must satisfy the national discharge standards [6]. However, successfully reclaimed water still contains nutrients, potentially hazardous compounds such as emerging contaminants, heavy metals and pathogens [7,8]. Therefore, the safety of water and the risk of eutrophication must be considered when utilizing reclaimed water.…”

Section: Introductionmentioning

confidence: 99%

Changes in Microbial Community Structures under Reclaimed Water Replenishment Conditions

Sun

Wang

et al. 2020

IJERPH

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Using reclaimed water as a resource for landscape water replenishment may alleviate the major problems of water resource shortages and water environment pollution. However, the safety of the reclaimed water and the risk of eutrophication caused by the reclaimed water replenishment are unclear to the public and to the research community. This study aimed to reveal the differences between natural water and reclaimed water and to discuss the rationality of reclaimed water replenishment from the perspective of microorganisms. The microbial community structures in natural water, reclaimed water and natural biofilms were analyzed, and the community succession was clarified along the ecological niches, water resources, fluidity and time using 16S rRNA gene amplicon sequencing. Primary biofilms without the original community were added to study the formation of microbial community structures under reclaimed water acclimation. The results showed that the difference caused by ecological niches was more than those caused by the fluidity of water and different water resources. No significant difference caused by the addition of reclaimed water was found in the microbial diversity and community structure. Based on the results of microbial analysis, reclaimed water replenishment is a feasible solution that can be used for supplying river water.

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“…Reducing the distance between wells and the river allows more surface water to be captured but weakens the purification effects of the RBF system. An increase in the drawdown will enable the extraction of more water, but it will also result in faster flow rates, which hinders the removal of pollutants (Pan, Huang, & Huang, ). However, once the pumping well is completed, and parameters such as well depth and spacing are fixed, drawdown is the only controllable factor affecting the water quantity and quality of the pumping well (Sapari, Azie, & Jusoh, ).…”

Section: Introductionmentioning

confidence: 99%

“…Hydrogeological parameters, such as hydraulic conductivity and hydraulic gradient, need to be determined by the pumping test. On the basis of the generalization of field hydrological conditions, an appropriate method is chosen to determine the parameters (Lautz & Siegel, ; Pan et al, ; Shankar, Eckert, Ojha, & König, ; Wang et al, ). However, the hydrochemical method is more extensively used.…”

Section: Introductionmentioning

confidence: 99%

The impact of well drawdowns on the mixing process of river water and groundwater and water quality in a riverside well field, Northeast China

Zhu

Zhai

et al. 2019

Hydrological Processes

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Riverbank filtration (RBF) has been widely used throughout the world as an effective means to regulate surface water and groundwater resources and pretreat raw water for municipal water supply. The quality of the water from a riverside well field and the mixing ratios of surface water and groundwater is primarily impacted by the hydrodynamic processes in the RBF system. The RBF system is largely controlled by the water exploiting system in addition to the natural hydrologic condition of the river–aquifer system. As one of the most important design parameters of the riverside well field, the drawdown of groundwater level greatly determines the water head differences between the river water and groundwater as well as the field flow net, which subsequently impacts the mixing of river water and groundwater and water quality significantly. This study aimed to improve the understanding of the mixing process between the surface water and groundwater and estimate the impact of the RBF on the mixing ratio of surface water–groundwater and water quality quantitatively. A set of field pumping tests with various groundwater level drawdowns were carried out independently and successively at a riverside field with a single pumping well near the Songhua River in Northeast China in August 2017. During these tests, the water levels and hydrochemical parameters of the Songhua River, the adjacent aquifer, and the pumping well were monitored. The dynamic mixing process of the river water and groundwater and water quality under various drawdown conditions were analysed systematically using analytical methods. The results obtained from Dupuit method and the Mirror Image method in conjunction with the Hydrochemical Tracing method showed that the pumping water directly from the river water reached 60% ± 10% after a steady flow net was established. The larger the proportion of the pumping water captured from the river, the better quality of the pumping water was, because the quality of the river water (only limited to some water quality parameters monitored which were minority) was better than that of the groundwater. The results also showed that total Fe, TDS, total hardness, CODMn, and K+ were relatively sensitive to the changes of groundwater drawdown, and their concentrations decreased with an increase in the groundwater drawdown. It can be concluded that both the mixing ratio of the surface water and the groundwater and the water quality of the riverside well field can be regulated through adjusting the designed drawdown of the groundwater level, which is helpful for the design and the optimization of the riverside well water intake engineering.

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Nitrogen and Organics Removal during Riverbank Filtration along a Reclaimed Water Restored River in Beijing, China

Cited by 26 publications

References 50 publications

Remediation of Polluted River Water by Biological, Chemical, Ecological and Engineering Processes

Remediation of Polluted River Water by Biological, Chemical, Ecological and Engineering Processes

Changes in Microbial Community Structures under Reclaimed Water Replenishment Conditions

The impact of well drawdowns on the mixing process of river water and groundwater and water quality in a riverside well field, Northeast China

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