Phosphorus and nitrogen removal from water using steel slag in soil-based low-impact development systems

Chen, Ying-Chu

doi:10.1016/j.jwpe.2021.102385

Cited by 13 publications

(3 citation statements)

References 28 publications

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“…Although the TP removal efficiencies of the MSL system that utilized local red clay were lower than that of the MSL system using iron particles, using local red clay showed a higher removal efficiency of P per gram Fe, and effectively reduced the overall cost of the MSL system. Waste steelmaking slags have also been employed to replace iron particles in SMBs, and a more than 85% phosphorus removal efficiency has been reported [79]. However, the aforementioned studies focused on the influence of iron source on the removal of phosphorus; whether the change in iron source affected the community structure in the SMBs and thus impacted the removal performance of other pollutants, such as COD, BOD, and TN, was not mentioned.…”

Section: Change Of Iron Sourcementioning

confidence: 99%

Progress in Multi-Soil-Layering Systems for Wastewater Treatment

Ma,

Wu,

Feng

et al. 2024

Sustainability

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The use of decentralized wastewater treatment technologies is a reasonable solution for rural areas. As a decentralized treatment technology, the multi-soil-layering (MSL) system has recently drawn an increasing amount of attention owing to its merits, such as a high hydraulic load rate, small land area occupation, low probability of clogging, low investment, and low operation cost. This review summarizes the progress in MSL systems in the past decade, focusing on the directions of efforts for system optimization, the latest applications of MSL systems to various wastewater treatments, and the integration of MSL with other technologies. The great application potential of MSL systems is illustrated, and future research directions regarding better application of MSL systems are provided.

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Section: Change Of Iron Sourcementioning

confidence: 99%

Progress in Multi-Soil-Layering Systems for Wastewater Treatment

Ma,

Wu,

Feng

et al. 2024

Sustainability

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“…The results show that zeolite in permeable layers of soil is more useful for reducing pollutants than gravel. Also, the use of steel waste slag can increase the soil's ability to remove phosphorus and nitrogen from wastewater (Chen, 2021). Soil-based wetlands for the release of treated wastewater have gotten to be a prevalent strategy to diminish stream to surface waters as well as give extra treatment that can be exceptionally advantageous in evacuating phosphorus from wastewater (Morvannou et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Feasibility of Improving the Quality of Treated Wastewater Owing to Soil Improvement

Vanani,

Ostad-Ali-Askari

2024

SSRN Journal

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“…Regarding P removal mechanisms, Zhou et al [9] have reported that micropores on the surface of soil mixture blocks contribute to the adsorption of P, while Fe 3+ in these blocks can co-precipitate with Chen [10] concluded that P precipitation driven by liberated iron ions was the primary process rather than adsorption in the MSL system. In the same regard, it has been suggested that physic-chemical mechanisms, rather than microbiological activities, are key in the MSL system's P removal [9].…”

Section: Introductionmentioning

confidence: 99%

Total phosphorus removal in multi-soil-layering nature-based technology: Evaluation of influencing factors and prediction using data-driven methods

Sbahi

Mandi

Ouazzani

et al. 2022

Preprint

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Excess phosphorus (P) in wastewater can produce eutrophication, posing a serious risk to the safety of water resources and ecosystems. Therefore, effective pollutant removal including P from wastewater is the key strategy to save the environment and public health. Multi-soil-layering (MSL) is a promising nature-based technology that mainly relies on a soil mixture containing iron to remove P-pollution from wastewater. In the MSL influent, fourteen water quality indicators were measured, including pH, dissolved oxygen, total suspended solids, electrical conductivity, organic matter, nutrients, and coliform bacteria, to determine which ones have the strongest relationship with total phosphorus (TP) removal. The influence of hydraulic loading rate (HLR) and climatic variables (air temperature, rainfall, and evaporation) on the removal of TP was investigated. Four data-driven methods including multiple linear regression (MLR), k-nearest neighbors (KNN), random forest (RF), and neural network (NN) were conducted to predict TP removal at the MSL system outlet. In contrast to climatic variables, the results reveal that the HLR has a significant impact (p < 0.05) on TP removal (47% − 90%) in the MSL system. Furthermore, using a feature selection technique, the HLR, pH, PO43− and TP were suggested as the relevant input variables affecting TP removal in the MSL system, while an examination of accuracy shows that the RF model achieves good prediction accuracy (R2 = 0.93) and can help to understand MSL behavior for pollutants.

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Phosphorus and nitrogen removal from water using steel slag in soil-based low-impact development systems

Cited by 13 publications

References 28 publications

Progress in Multi-Soil-Layering Systems for Wastewater Treatment

Progress in Multi-Soil-Layering Systems for Wastewater Treatment

Feasibility of Improving the Quality of Treated Wastewater Owing to Soil Improvement

Total phosphorus removal in multi-soil-layering nature-based technology: Evaluation of influencing factors and prediction using data-driven methods

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